1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2011, 2016 by Delphix. All rights reserved. 24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 25 * Copyright 2014 Josef "Jeff" Sipek <jeffpc@josefsipek.net> 26 * Copyright 2020 Joyent, Inc. 27 * Copyright 2022 Oxide Computer Company 28 * Copyright 2022 MNX Cloud, Inc. 29 */ 30 /* 31 * Copyright (c) 2010, Intel Corporation. 32 * All rights reserved. 33 */ 34 /* 35 * Portions Copyright 2009 Advanced Micro Devices, Inc. 36 */ 37 38 /* 39 * CPU Identification logic 40 * 41 * The purpose of this file and its companion, cpuid_subr.c, is to help deal 42 * with the identification of CPUs, their features, and their topologies. More 43 * specifically, this file helps drive the following: 44 * 45 * 1. Enumeration of features of the processor which are used by the kernel to 46 * determine what features to enable or disable. These may be instruction set 47 * enhancements or features that we use. 48 * 49 * 2. Enumeration of instruction set architecture (ISA) additions that userland 50 * will be told about through the auxiliary vector. 51 * 52 * 3. Understanding the physical topology of the CPU such as the number of 53 * caches, how many cores it has, whether or not it supports symmetric 54 * multi-processing (SMT), etc. 55 * 56 * ------------------------ 57 * CPUID History and Basics 58 * ------------------------ 59 * 60 * The cpuid instruction was added by Intel roughly around the time that the 61 * original Pentium was introduced. The purpose of cpuid was to tell in a 62 * programmatic fashion information about the CPU that previously was guessed 63 * at. For example, an important part of cpuid is that we can know what 64 * extensions to the ISA exist. If you use an invalid opcode you would get a 65 * #UD, so this method allows a program (whether a user program or the kernel) 66 * to determine what exists without crashing or getting a SIGILL. Of course, 67 * this was also during the era of the clones and the AMD Am5x86. The vendor 68 * name shows up first in cpuid for a reason. 69 * 70 * cpuid information is broken down into ranges called a 'leaf'. Each leaf puts 71 * unique values into the registers %eax, %ebx, %ecx, and %edx and each leaf has 72 * its own meaning. The different leaves are broken down into different regions: 73 * 74 * [ 0, 7fffffff ] This region is called the 'basic' 75 * region. This region is generally defined 76 * by Intel, though some of the original 77 * portions have different meanings based 78 * on the manufacturer. These days, Intel 79 * adds most new features to this region. 80 * AMD adds non-Intel compatible 81 * information in the third, extended 82 * region. Intel uses this for everything 83 * including ISA extensions, CPU 84 * features, cache information, topology, 85 * and more. 86 * 87 * There is a hole carved out of this 88 * region which is reserved for 89 * hypervisors. 90 * 91 * [ 40000000, 4fffffff ] This region, which is found in the 92 * middle of the previous region, is 93 * explicitly promised to never be used by 94 * CPUs. Instead, it is used by hypervisors 95 * to communicate information about 96 * themselves to the operating system. The 97 * values and details are unique for each 98 * hypervisor. 99 * 100 * [ 80000000, ffffffff ] This region is called the 'extended' 101 * region. Some of the low leaves mirror 102 * parts of the basic leaves. This region 103 * has generally been used by AMD for 104 * various extensions. For example, AMD- 105 * specific information about caches, 106 * features, and topology are found in this 107 * region. 108 * 109 * To specify a range, you place the desired leaf into %eax, zero %ebx, %ecx, 110 * and %edx, and then issue the cpuid instruction. At the first leaf in each of 111 * the ranges, one of the primary things returned is the maximum valid leaf in 112 * that range. This allows for discovery of what range of CPUID is valid. 113 * 114 * The CPUs have potentially surprising behavior when using an invalid leaf or 115 * unimplemented leaf. If the requested leaf is within the valid basic or 116 * extended range, but is unimplemented, then %eax, %ebx, %ecx, and %edx will be 117 * set to zero. However, if you specify a leaf that is outside of a valid range, 118 * then instead it will be filled with the last valid _basic_ leaf. For example, 119 * if the maximum basic value is on leaf 0x3, then issuing a cpuid for leaf 4 or 120 * an invalid extended leaf will return the information for leaf 3. 121 * 122 * Some leaves are broken down into sub-leaves. This means that the value 123 * depends on both the leaf asked for in %eax and a secondary register. For 124 * example, Intel uses the value in %ecx on leaf 7 to indicate a sub-leaf to get 125 * additional information. Or when getting topology information in leaf 0xb, the 126 * initial value in %ecx changes which level of the topology that you are 127 * getting information about. 128 * 129 * cpuid values are always kept to 32 bits regardless of whether or not the 130 * program is in 64-bit mode. When executing in 64-bit mode, the upper 131 * 32 bits of the register are always set to zero so that way the values are the 132 * same regardless of execution mode. 133 * 134 * ---------------------- 135 * Identifying Processors 136 * ---------------------- 137 * 138 * We can identify a processor in two steps. The first step looks at cpuid leaf 139 * 0. Leaf 0 contains the processor's vendor information. This is done by 140 * putting a 12 character string in %ebx, %ecx, and %edx. On AMD, it is 141 * 'AuthenticAMD' and on Intel it is 'GenuineIntel'. 142 * 143 * From there, a processor is identified by a combination of three different 144 * values: 145 * 146 * 1. Family 147 * 2. Model 148 * 3. Stepping 149 * 150 * Each vendor uses the family and model to uniquely identify a processor. The 151 * way that family and model are changed depends on the vendor. For example, 152 * Intel has been using family 0x6 for almost all of their processor since the 153 * Pentium Pro/Pentium II era, often called the P6. The model is used to 154 * identify the exact processor. Different models are often used for the client 155 * (consumer) and server parts. Even though each processor often has major 156 * architectural differences, they still are considered the same family by 157 * Intel. 158 * 159 * On the other hand, each major AMD architecture generally has its own family. 160 * For example, the K8 is family 0x10, Bulldozer 0x15, and Zen 0x17. Within it 161 * the model number is used to help identify specific processors. As AMD's 162 * product lines have expanded, they have started putting a mixed bag of 163 * processors into the same family, with each processor under a single 164 * identifying banner (e.g., Milan, Cezanne) using a range of model numbers. We 165 * refer to each such collection as a processor family, distinct from cpuid 166 * family. Importantly, each processor family has a BIOS and Kernel Developer's 167 * Guide (BKDG, older parts) or Processor Programming Reference (PPR) that 168 * defines the processor family's non-architectural features. In general, we'll 169 * use "family" here to mean the family number reported by the cpuid instruction 170 * and distinguish the processor family from it where appropriate. 171 * 172 * The stepping is used to refer to a revision of a specific microprocessor. The 173 * term comes from equipment used to produce masks that are used to create 174 * integrated circuits. 175 * 176 * The information is present in leaf 1, %eax. In technical documentation you 177 * will see the terms extended model and extended family. The original family, 178 * model, and stepping fields were each 4 bits wide. If the values in either 179 * are 0xf, then one is to consult the extended model and extended family, which 180 * take previously reserved bits and allow for a larger number of models and add 181 * 0xf to them. 182 * 183 * When we process this information, we store the full family, model, and 184 * stepping in the struct cpuid_info members cpi_family, cpi_model, and 185 * cpi_step, respectively. Whenever you are performing comparisons with the 186 * family, model, and stepping, you should use these members and not the raw 187 * values from cpuid. If you must use the raw values from cpuid directly, you 188 * must make sure that you add the extended model and family to the base model 189 * and family. 190 * 191 * In general, we do not use information about the family, model, and stepping 192 * to determine whether or not a feature is present; that is generally driven by 193 * specific leaves. However, when something we care about on the processor is 194 * not considered 'architectural' meaning that it is specific to a set of 195 * processors and not promised in the architecture model to be consistent from 196 * generation to generation, then we will fall back on this information. The 197 * most common cases where this comes up is when we have to workaround errata in 198 * the processor, are dealing with processor-specific features such as CPU 199 * performance counters, or we want to provide additional information for things 200 * such as fault management. 201 * 202 * While processors also do have a brand string, which is the name that people 203 * are familiar with when buying the processor, they are not meant for 204 * programmatic consumption. That is what the family, model, and stepping are 205 * for. 206 * 207 * We use the x86_chiprev_t to encode a combination of vendor, processor family, 208 * and stepping(s) that refer to a single or very closely related set of silicon 209 * implementations; while there are sometimes more specific ways to learn of the 210 * presence or absence of a particular erratum or workaround, one may generally 211 * assume that all processors of the same chiprev have the same errata and we 212 * have chosen to represent them this way precisely because that is how AMD 213 * groups them in their revision guides (errata documentation). The processor 214 * family (x86_processor_family_t) may be extracted from the chiprev if that 215 * level of detail is not needed. Processor families are considered unordered 216 * but revisions within a family may be compared for either an exact match or at 217 * least as recent as a reference revision. See the chiprev_xxx() functions 218 * below. 219 * 220 * Similarly, each processor family implements a particular microarchitecture, 221 * which itself may have multiple revisions. In general, non-architectural 222 * features are specific to a processor family, but some may exist across 223 * families containing cores that implement the same microarchitectural revision 224 * (and, such cores share common bugs, too). We provide utility routines 225 * analogous to those for extracting and comparing chiprevs for 226 * microarchitectures as well; see the uarch_xxx() functions. 227 * 228 * Both chiprevs and uarchrevs are defined in x86_archext.h and both are at 229 * present used and available only for AMD and AMD-like processors. 230 * 231 * ------------ 232 * CPUID Passes 233 * ------------ 234 * 235 * As part of performing feature detection, we break this into several different 236 * passes. There used to be a pass 0 that was done from assembly in locore.s to 237 * support processors that have a missing or broken cpuid instruction (notably 238 * certain Cyrix processors) but those were all 32-bit processors which are no 239 * longer supported. Passes are no longer numbered explicitly to make it easier 240 * to break them up or move them around as needed; however, they still have a 241 * well-defined execution ordering enforced by the definition of cpuid_pass_t in 242 * x86_archext.h. The external interface to execute a cpuid pass or determine 243 * whether a pass has been completed consists of cpuid_execpass() and 244 * cpuid_checkpass() respectively. The passes now, in that execution order, 245 * are as follows: 246 * 247 * PRELUDE This pass does not have any dependencies on system 248 * setup; in particular, unlike all subsequent passes it is 249 * guaranteed not to require PCI config space access. It 250 * sets the flag indicating that the processor we are 251 * running on supports the cpuid instruction, which all 252 * 64-bit processors do. This would also be the place to 253 * add any other basic state that is required later on and 254 * can be learned without dependencies. 255 * 256 * IDENT Determine which vendor manufactured the CPU, the family, 257 * model, and stepping information, and compute basic 258 * identifying tags from those values. This is done first 259 * so that machine-dependent code can control the features 260 * the cpuid instruction will report during subsequent 261 * passes if needed, and so that any intervening 262 * machine-dependent code that needs basic identity will 263 * have it available. This includes synthesised 264 * identifiers such as chiprev and uarchrev as well as the 265 * values obtained directly from cpuid. Prior to executing 266 * this pass, machine-depedent boot code is responsible for 267 * ensuring that the PCI configuration space access 268 * functions have been set up and, if necessary, that 269 * determine_platform() has been called. 270 * 271 * BASIC This is the primary pass and is responsible for doing a 272 * large number of different things: 273 * 274 * 1. Gathering a large number of feature flags to 275 * determine which features the CPU support and which 276 * indicate things that we need to do other work in the OS 277 * to enable. Features detected this way are added to the 278 * x86_featureset which can be queried to 279 * determine what we should do. This includes processing 280 * all of the basic and extended CPU features that we care 281 * about. 282 * 283 * 2. Determining the CPU's topology. This includes 284 * information about how many cores and threads are present 285 * in the package. It also is responsible for figuring out 286 * which logical CPUs are potentially part of the same core 287 * and what other resources they might share. For more 288 * information see the 'Topology' section. 289 * 290 * 3. Determining the set of CPU security-specific features 291 * that we need to worry about and determine the 292 * appropriate set of workarounds. 293 * 294 * Pass 1 on the boot CPU occurs before KMDB is started. 295 * 296 * EXTENDED The second pass is done after startup(). Here, we check 297 * other miscellaneous features. Most of this is gathering 298 * additional basic and extended features that we'll use in 299 * later passes or for debugging support. 300 * 301 * DYNAMIC The third pass occurs after the kernel memory allocator 302 * has been fully initialized. This gathers information 303 * where we might need dynamic memory available for our 304 * uses. This includes several varying width leaves that 305 * have cache information and the processor's brand string. 306 * 307 * RESOLVE The fourth and final normal pass is performed after the 308 * kernel has brought most everything online. This is 309 * invoked from post_startup(). In this pass, we go through 310 * the set of features that we have enabled and turn that 311 * into the hardware auxiliary vector features that 312 * userland receives. This is used by userland, primarily 313 * by the run-time link-editor (RTLD), though userland 314 * software could also refer to it directly. 315 * 316 * The function that performs a pass is currently assumed to be infallible, and 317 * all existing implementation are. This simplifies callers by allowing 318 * cpuid_execpass() to return void. Similarly, implementers do not need to check 319 * for a NULL CPU argument; the current CPU's cpu_t is substituted if necessary. 320 * Both of these assumptions can be relaxed if needed by future developments. 321 * Tracking of completed states is handled by cpuid_execpass(). It is programmer 322 * error to attempt to execute a pass before all previous passes have been 323 * completed on the specified CPU, or to request cpuid information before the 324 * pass that captures it has been executed. These conditions can be tested 325 * using cpuid_checkpass(). 326 * 327 * The Microcode Pass 328 * 329 * After a microcode update, we do a selective rescan of the cpuid leaves to 330 * determine what features have changed. Microcode updates can provide more 331 * details about security related features to deal with issues like Spectre and 332 * L1TF. On occasion, vendors have violated their contract and removed bits. 333 * However, we don't try to detect that because that puts us in a situation that 334 * we really can't deal with. As such, the only thing we rescan are security 335 * related features today. See cpuid_pass_ucode(). This pass may be run in a 336 * different sequence on APs and therefore is not part of the sequential order; 337 * It is invoked directly instead of by cpuid_execpass() and its completion 338 * status cannot be checked by cpuid_checkpass(). This could be integrated with 339 * a more complex dependency mechanism if warranted by future developments. 340 * 341 * All of the passes are run on all CPUs. However, for the most part we only 342 * care about what the boot CPU says about this information and use the other 343 * CPUs as a rough guide to sanity check that we have the same feature set. 344 * 345 * We do not support running multiple logical CPUs with disjoint, let alone 346 * different, feature sets. 347 * 348 * ------------------ 349 * Processor Topology 350 * ------------------ 351 * 352 * One of the important things that we need to do is to understand the topology 353 * of the underlying processor. When we say topology in this case, we're trying 354 * to understand the relationship between the logical CPUs that the operating 355 * system sees and the underlying physical layout. Different logical CPUs may 356 * share different resources which can have important consequences for the 357 * performance of the system. For example, they may share caches, execution 358 * units, and more. 359 * 360 * The topology of the processor changes from generation to generation and 361 * vendor to vendor. Along with that, different vendors use different 362 * terminology, and the operating system itself uses occasionally overlapping 363 * terminology. It's important to understand what this topology looks like so 364 * one can understand the different things that we try to calculate and 365 * determine. 366 * 367 * To get started, let's talk about a little bit of terminology that we've used 368 * so far, is used throughout this file, and is fairly generic across multiple 369 * vendors: 370 * 371 * CPU 372 * A central processing unit (CPU) refers to a logical and/or virtual 373 * entity that the operating system can execute instructions on. The 374 * underlying resources for this CPU may be shared between multiple 375 * entities; however, to the operating system it is a discrete unit. 376 * 377 * PROCESSOR and PACKAGE 378 * 379 * Generally, when we use the term 'processor' on its own, we are referring 380 * to the physical entity that one buys and plugs into a board. However, 381 * because processor has been overloaded and one might see it used to mean 382 * multiple different levels, we will instead use the term 'package' for 383 * the rest of this file. The term package comes from the electrical 384 * engineering side and refers to the physical entity that encloses the 385 * electronics inside. Strictly speaking the package can contain more than 386 * just the CPU, for example, on many processors it may also have what's 387 * called an 'integrated graphical processing unit (GPU)'. Because the 388 * package can encapsulate multiple units, it is the largest physical unit 389 * that we refer to. 390 * 391 * SOCKET 392 * 393 * A socket refers to unit on a system board (generally the motherboard) 394 * that can receive a package. A single package, or processor, is plugged 395 * into a single socket. A system may have multiple sockets. Often times, 396 * the term socket is used interchangeably with package and refers to the 397 * electrical component that has plugged in, and not the receptacle itself. 398 * 399 * CORE 400 * 401 * A core refers to the physical instantiation of a CPU, generally, with a 402 * full set of hardware resources available to it. A package may contain 403 * multiple cores inside of it or it may just have a single one. A 404 * processor with more than one core is often referred to as 'multi-core'. 405 * In illumos, we will use the feature X86FSET_CMP to refer to a system 406 * that has 'multi-core' processors. 407 * 408 * A core may expose a single logical CPU to the operating system, or it 409 * may expose multiple CPUs, which we call threads, defined below. 410 * 411 * Some resources may still be shared by cores in the same package. For 412 * example, many processors will share the level 3 cache between cores. 413 * Some AMD generations share hardware resources between cores. For more 414 * information on that see the section 'AMD Topology'. 415 * 416 * THREAD and STRAND 417 * 418 * In this file, generally a thread refers to a hardware resources and not 419 * the operating system's logical abstraction. A thread is always exposed 420 * as an independent logical CPU to the operating system. A thread belongs 421 * to a specific core. A core may have more than one thread. When that is 422 * the case, the threads that are part of the same core are often referred 423 * to as 'siblings'. 424 * 425 * When multiple threads exist, this is generally referred to as 426 * simultaneous multi-threading (SMT). When Intel introduced this in their 427 * processors they called it hyper-threading (HT). When multiple threads 428 * are active in a core, they split the resources of the core. For example, 429 * two threads may share the same set of hardware execution units. 430 * 431 * The operating system often uses the term 'strand' to refer to a thread. 432 * This helps disambiguate it from the software concept. 433 * 434 * CHIP 435 * 436 * Unfortunately, the term 'chip' is dramatically overloaded. At its most 437 * base meaning, it is used to refer to a single integrated circuit, which 438 * may or may not be the only thing in the package. In illumos, when you 439 * see the term 'chip' it is almost always referring to the same thing as 440 * the 'package'. However, many vendors may use chip to refer to one of 441 * many integrated circuits that have been placed in the package. As an 442 * example, see the subsequent definition. 443 * 444 * To try and keep things consistent, we will only use chip when referring 445 * to the entire integrated circuit package, with the exception of the 446 * definition of multi-chip module (because it is in the name) and use the 447 * term 'die' when we want the more general, potential sub-component 448 * definition. 449 * 450 * DIE 451 * 452 * A die refers to an integrated circuit. Inside of the package there may 453 * be a single die or multiple dies. This is sometimes called a 'chip' in 454 * vendor's parlance, but in this file, we use the term die to refer to a 455 * subcomponent. 456 * 457 * MULTI-CHIP MODULE 458 * 459 * A multi-chip module (MCM) refers to putting multiple distinct chips that 460 * are connected together in the same package. When a multi-chip design is 461 * used, generally each chip is manufactured independently and then joined 462 * together in the package. For example, on AMD's Zen microarchitecture 463 * (family 0x17), the package contains several dies (the second meaning of 464 * chip from above) that are connected together. 465 * 466 * CACHE 467 * 468 * A cache is a part of the processor that maintains copies of recently 469 * accessed memory. Caches are split into levels and then into types. 470 * Commonly there are one to three levels, called level one, two, and 471 * three. The lower the level, the smaller it is, the closer it is to the 472 * execution units of the CPU, and the faster it is to access. The layout 473 * and design of the cache come in many different flavors, consult other 474 * resources for a discussion of those. 475 * 476 * Caches are generally split into two types, the instruction and data 477 * cache. The caches contain what their names suggest, the instruction 478 * cache has executable program text, while the data cache has all other 479 * memory that the processor accesses. As of this writing, data is kept 480 * coherent between all of the caches on x86, so if one modifies program 481 * text before it is executed, that will be in the data cache, and the 482 * instruction cache will be synchronized with that change when the 483 * processor actually executes those instructions. This coherency also 484 * covers the fact that data could show up in multiple caches. 485 * 486 * Generally, the lowest level caches are specific to a core. However, the 487 * last layer cache is shared between some number of cores. The number of 488 * CPUs sharing this last level cache is important. This has implications 489 * for the choices that the scheduler makes, as accessing memory that might 490 * be in a remote cache after thread migration can be quite expensive. 491 * 492 * Sometimes, the word cache is abbreviated with a '$', because in US 493 * English the word cache is pronounced the same as cash. So L1D$ refers to 494 * the L1 data cache, and L2$ would be the L2 cache. This will not be used 495 * in the rest of this theory statement for clarity. 496 * 497 * MEMORY CONTROLLER 498 * 499 * The memory controller is a component that provides access to DRAM. Each 500 * memory controller can access a set number of DRAM channels. Each channel 501 * can have a number of DIMMs (sticks of memory) associated with it. A 502 * given package may have more than one memory controller. The association 503 * of the memory controller to a group of cores is important as it is 504 * cheaper to access memory on the controller that you are associated with. 505 * 506 * NUMA 507 * 508 * NUMA or non-uniform memory access, describes a way that systems are 509 * built. On x86, any processor core can address all of the memory in the 510 * system. However, When using multiple sockets or possibly within a 511 * multi-chip module, some of that memory is physically closer and some of 512 * it is further. Memory that is further away is more expensive to access. 513 * Consider the following image of multiple sockets with memory: 514 * 515 * +--------+ +--------+ 516 * | DIMM A | +----------+ +----------+ | DIMM D | 517 * +--------+-+ | | | | +-+------+-+ 518 * | DIMM B |=======| Socket 0 |======| Socket 1 |=======| DIMM E | 519 * +--------+-+ | | | | +-+------+-+ 520 * | DIMM C | +----------+ +----------+ | DIMM F | 521 * +--------+ +--------+ 522 * 523 * In this example, Socket 0 is closer to DIMMs A-C while Socket 1 is 524 * closer to DIMMs D-F. This means that it is cheaper for socket 0 to 525 * access DIMMs A-C and more expensive to access D-F as it has to go 526 * through Socket 1 to get there. The inverse is true for Socket 1. DIMMs 527 * D-F are cheaper than A-C. While the socket form is the most common, when 528 * using multi-chip modules, this can also sometimes occur. For another 529 * example of this that's more involved, see the AMD topology section. 530 * 531 * 532 * Intel Topology 533 * -------------- 534 * 535 * Most Intel processors since Nehalem, (as of this writing the current gen 536 * is Skylake / Cannon Lake) follow a fairly similar pattern. The CPU portion of 537 * the package is a single monolithic die. MCMs currently aren't used. Most 538 * parts have three levels of caches, with the L3 cache being shared between 539 * all of the cores on the package. The L1/L2 cache is generally specific to 540 * an individual core. The following image shows at a simplified level what 541 * this looks like. The memory controller is commonly part of something called 542 * the 'Uncore', that used to be separate physical chips that were not a part of 543 * the package, but are now part of the same chip. 544 * 545 * +-----------------------------------------------------------------------+ 546 * | Package | 547 * | +-------------------+ +-------------------+ +-------------------+ | 548 * | | Core | | Core | | Core | | 549 * | | +--------+ +---+ | | +--------+ +---+ | | +--------+ +---+ | | 550 * | | | Thread | | L | | | | Thread | | L | | | | Thread | | L | | | 551 * | | +--------+ | 1 | | | +--------+ | 1 | | | +--------+ | 1 | | | 552 * | | +--------+ | | | | +--------+ | | | | +--------+ | | | | 553 * | | | Thread | | | | | | Thread | | | | | | Thread | | | | | 554 * | | +--------+ +---+ | | +--------+ +---+ | | +--------+ +---+ | | 555 * | | +--------------+ | | +--------------+ | | +--------------+ | | 556 * | | | L2 Cache | | | | L2 Cache | | | | L2 Cache | | | 557 * | | +--------------+ | | +--------------+ | | +--------------+ | | 558 * | +-------------------+ +-------------------+ +-------------------+ | 559 * | +-------------------------------------------------------------------+ | 560 * | | Shared L3 Cache | | 561 * | +-------------------------------------------------------------------+ | 562 * | +-------------------------------------------------------------------+ | 563 * | | Memory Controller | | 564 * | +-------------------------------------------------------------------+ | 565 * +-----------------------------------------------------------------------+ 566 * 567 * A side effect of this current architecture is that what we care about from a 568 * scheduling and topology perspective, is simplified. In general we care about 569 * understanding which logical CPUs are part of the same core and socket. 570 * 571 * To determine the relationship between threads and cores, Intel initially used 572 * the identifier in the advanced programmable interrupt controller (APIC). They 573 * also added cpuid leaf 4 to give additional information about the number of 574 * threads and CPUs in the processor. With the addition of x2apic (which 575 * increased the number of addressable logical CPUs from 8-bits to 32-bits), an 576 * additional cpuid topology leaf 0xB was added. 577 * 578 * AMD Topology 579 * ------------ 580 * 581 * When discussing AMD topology, we want to break this into three distinct 582 * generations of topology. There's the basic topology that has been used in 583 * family 0xf+ (Opteron, Athlon64), there's the topology that was introduced 584 * with family 0x15 (Bulldozer), and there's the topology that was introduced 585 * with family 0x17 (Zen), evolved more dramatically in Zen 2 (still family 586 * 0x17), and tweaked slightly in Zen 3 (family 19h). AMD also has some 587 * additional terminology that's worth talking about. 588 * 589 * Until the introduction of family 0x17 (Zen), AMD did not implement something 590 * that they considered SMT. Whether or not the AMD processors have SMT 591 * influences many things including scheduling and reliability, availability, 592 * and serviceability (RAS) features. 593 * 594 * NODE 595 * 596 * AMD uses the term node to refer to a die that contains a number of cores 597 * and I/O resources. Depending on the processor family and model, more 598 * than one node can be present in the package. When there is more than one 599 * node this indicates a multi-chip module. Usually each node has its own 600 * access to memory and I/O devices. This is important and generally 601 * different from the corresponding Intel Nehalem-Skylake+ processors. As a 602 * result, we track this relationship in the operating system. 603 * 604 * In processors with an L3 cache, the L3 cache is generally shared across 605 * the entire node, though the way this is carved up varies from generation 606 * to generation. 607 * 608 * BULLDOZER 609 * 610 * Starting with the Bulldozer family (0x15) and continuing until the 611 * introduction of the Zen microarchitecture, AMD introduced the idea of a 612 * compute unit. In a compute unit, two traditional cores share a number of 613 * hardware resources. Critically, they share the FPU, L1 instruction 614 * cache, and the L2 cache. Several compute units were then combined inside 615 * of a single node. Because the integer execution units, L1 data cache, 616 * and some other resources were not shared between the cores, AMD never 617 * considered this to be SMT. 618 * 619 * ZEN 620 * 621 * The Zen family (0x17) uses a multi-chip module (MCM) design, the module 622 * is called Zeppelin. These modules are similar to the idea of nodes used 623 * previously. Each of these nodes has two DRAM channels which all of the 624 * cores in the node can access uniformly. These nodes are linked together 625 * in the package, creating a NUMA environment. 626 * 627 * The Zeppelin die itself contains two different 'core complexes'. Each 628 * core complex consists of four cores which each have two threads, for a 629 * total of 8 logical CPUs per complex. Unlike other generations, 630 * where all the logical CPUs in a given node share the L3 cache, here each 631 * core complex has its own shared L3 cache. 632 * 633 * A further thing that we need to consider is that in some configurations, 634 * particularly with the Threadripper line of processors, not every die 635 * actually has its memory controllers wired up to actual memory channels. 636 * This means that some cores have memory attached to them and others 637 * don't. 638 * 639 * To put Zen in perspective, consider the following images: 640 * 641 * +--------------------------------------------------------+ 642 * | Core Complex | 643 * | +-------------------+ +-------------------+ +---+ | 644 * | | Core +----+ | | Core +----+ | | | | 645 * | | +--------+ | L2 | | | +--------+ | L2 | | | | | 646 * | | | Thread | +----+ | | | Thread | +----+ | | | | 647 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | L | | 648 * | | | Thread | |L1| | | | Thread | |L1| | | 3 | | 649 * | | +--------+ +--+ | | +--------+ +--+ | | | | 650 * | +-------------------+ +-------------------+ | C | | 651 * | +-------------------+ +-------------------+ | a | | 652 * | | Core +----+ | | Core +----+ | | c | | 653 * | | +--------+ | L2 | | | +--------+ | L2 | | | h | | 654 * | | | Thread | +----+ | | | Thread | +----+ | | e | | 655 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | | | 656 * | | | Thread | |L1| | | | Thread | |L1| | | | | 657 * | | +--------+ +--+ | | +--------+ +--+ | | | | 658 * | +-------------------+ +-------------------+ +---+ | 659 * | | 660 * +--------------------------------------------------------+ 661 * 662 * This first image represents a single Zen core complex that consists of four 663 * cores. 664 * 665 * 666 * +--------------------------------------------------------+ 667 * | Zeppelin Die | 668 * | +--------------------------------------------------+ | 669 * | | I/O Units (PCIe, SATA, USB, etc.) | | 670 * | +--------------------------------------------------+ | 671 * | HH | 672 * | +-----------+ HH +-----------+ | 673 * | | | HH | | | 674 * | | Core |==========| Core | | 675 * | | Complex |==========| Complex | | 676 * | | | HH | | | 677 * | +-----------+ HH +-----------+ | 678 * | HH | 679 * | +--------------------------------------------------+ | 680 * | | Memory Controller | | 681 * | +--------------------------------------------------+ | 682 * | | 683 * +--------------------------------------------------------+ 684 * 685 * This image represents a single Zeppelin Die. Note how both cores are 686 * connected to the same memory controller and I/O units. While each core 687 * complex has its own L3 cache as seen in the first image, they both have 688 * uniform access to memory. 689 * 690 * 691 * PP PP 692 * PP PP 693 * +----------PP---------------------PP---------+ 694 * | PP PP | 695 * | +-----------+ +-----------+ | 696 * | | | | | | 697 * MMMMMMMMM| Zeppelin |==========| Zeppelin |MMMMMMMMM 698 * MMMMMMMMM| Die |==========| Die |MMMMMMMMM 699 * | | | | | | 700 * | +-----------+ooo ...+-----------+ | 701 * | HH ooo ... HH | 702 * | HH oo.. HH | 703 * | HH ..oo HH | 704 * | HH ... ooo HH | 705 * | +-----------+... ooo+-----------+ | 706 * | | | | | | 707 * MMMMMMMMM| Zeppelin |==========| Zeppelin |MMMMMMMMM 708 * MMMMMMMMM| Die |==========| Die |MMMMMMMMM 709 * | | | | | | 710 * | +-----------+ +-----------+ | 711 * | PP PP | 712 * +----------PP---------------------PP---------+ 713 * PP PP 714 * PP PP 715 * 716 * This image represents a single Zen package. In this example, it has four 717 * Zeppelin dies, though some configurations only have a single one. In this 718 * example, each die is directly connected to the next. Also, each die is 719 * represented as being connected to memory by the 'M' character and connected 720 * to PCIe devices and other I/O, by the 'P' character. Because each Zeppelin 721 * die is made up of two core complexes, we have multiple different NUMA 722 * domains that we care about for these systems. 723 * 724 * ZEN 2 725 * 726 * Zen 2 changes things in a dramatic way from Zen 1. Whereas in Zen 1 727 * each Zeppelin Die had its own I/O die, that has been moved out of the 728 * core complex in Zen 2. The actual core complex looks pretty similar, but 729 * now the die actually looks much simpler: 730 * 731 * +--------------------------------------------------------+ 732 * | Zen 2 Core Complex Die HH | 733 * | HH | 734 * | +-----------+ HH +-----------+ | 735 * | | | HH | | | 736 * | | Core |==========| Core | | 737 * | | Complex |==========| Complex | | 738 * | | | HH | | | 739 * | +-----------+ HH +-----------+ | 740 * | HH | 741 * | HH | 742 * +--------------------------------------------------------+ 743 * 744 * From here, when we add the central I/O die, this changes things a bit. 745 * Each die is connected to the I/O die, rather than trying to interconnect 746 * them directly. The following image takes the same Zen 1 image that we 747 * had earlier and shows what it looks like with the I/O die instead: 748 * 749 * PP PP 750 * PP PP 751 * +---------------------PP----PP---------------------+ 752 * | PP PP | 753 * | +-----------+ PP PP +-----------+ | 754 * | | | PP PP | | | 755 * | | Zen 2 | +-PP----PP-+ | Zen 2 | | 756 * | | Die _| | PP PP | |_ Die | | 757 * | | |o|oooo| |oooo|o| | | 758 * | +-----------+ | | +-----------+ | 759 * | | I/O | | 760 * MMMMMMMMMMMMMMMMMMMMMMMMMM Die MMMMMMMMMMMMMMMMMMMMMMMMMM 761 * MMMMMMMMMMMMMMMMMMMMMMMMMM MMMMMMMMMMMMMMMMMMMMMMMMMM 762 * | | | | 763 * MMMMMMMMMMMMMMMMMMMMMMMMMM MMMMMMMMMMMMMMMMMMMMMMMMMM 764 * MMMMMMMMMMMMMMMMMMMMMMMMMM MMMMMMMMMMMMMMMMMMMMMMMMMM 765 * | | | | 766 * | +-----------+ | | +-----------+ | 767 * | | |o|oooo| PP PP |oooo|o| | | 768 * | | Zen 2 -| +-PP----PP-+ |- Zen 2 | | 769 * | | Die | PP PP | Die | | 770 * | | | PP PP | | | 771 * | +-----------+ PP PP +-----------+ | 772 * | PP PP | 773 * +---------------------PP----PP---------------------+ 774 * PP PP 775 * PP PP 776 * 777 * The above has four core complex dies installed, though the Zen 2 EPYC 778 * and ThreadRipper parts allow for up to eight, while the Ryzen parts 779 * generally only have one to two. The more notable difference here is how 780 * everything communicates. Note that memory and PCIe come out of the 781 * central die. This changes the way that one die accesses a resource. It 782 * basically always has to go to the I/O die, where as in Zen 1 it may have 783 * satisfied it locally. In general, this ends up being a better strategy 784 * for most things, though it is possible to still treat everything in four 785 * distinct NUMA domains with each Zen 2 die slightly closer to some memory 786 * and PCIe than otherwise. This also impacts the 'amdzen' nexus driver as 787 * now there is only one 'node' present. 788 * 789 * ZEN 3 790 * 791 * From an architectural perspective, Zen 3 is a much smaller change from 792 * Zen 2 than Zen 2 was from Zen 1, though it makes up for most of that in 793 * its microarchitectural changes. The biggest thing for us is how the die 794 * changes. In Zen 1 and Zen 2, each core complex still had its own L3 795 * cache. However, in Zen 3, the L3 is now shared between the entire core 796 * complex die and is no longer partitioned between each core complex. This 797 * means that all cores on the die can share the same L3 cache. Otherwise, 798 * the general layout of the overall package with various core complexes 799 * and an I/O die stays the same. Here's what the Core Complex Die looks 800 * like in a bit more detail: 801 * 802 * +-------------------------------------------------+ 803 * | Zen 3 Core Complex Die | 804 * | +-------------------+ +-------------------+ | 805 * | | Core +----+ | | Core +----+ | | 806 * | | +--------+ | L2 | | | +--------+ | L2 | | | 807 * | | | Thread | +----+ | | | Thread | +----+ | | 808 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | 809 * | | | Thread | |L1| | | | Thread | |L1| | | 810 * | | +--------+ +--+ | | +--------+ +--+ | | 811 * | +-------------------+ +-------------------+ | 812 * | +-------------------+ +-------------------+ | 813 * | | Core +----+ | | Core +----+ | | 814 * | | +--------+ | L2 | | | +--------+ | L2 | | | 815 * | | | Thread | +----+ | | | Thread | +----+ | | 816 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | 817 * | | | Thread | |L1| | | | Thread | |L1| | | 818 * | | +--------+ +--+ | | +--------+ +--+ | | 819 * | +-------------------+ +-------------------+ | 820 * | | 821 * | +--------------------------------------------+ | 822 * | | L3 Cache | | 823 * | +--------------------------------------------+ | 824 * | | 825 * | +-------------------+ +-------------------+ | 826 * | | Core +----+ | | Core +----+ | | 827 * | | +--------+ | L2 | | | +--------+ | L2 | | | 828 * | | | Thread | +----+ | | | Thread | +----+ | | 829 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | 830 * | | | Thread | |L1| | | | Thread | |L1| | | 831 * | | +--------+ +--+ | | +--------+ +--+ | | 832 * | +-------------------+ +-------------------+ | 833 * | +-------------------+ +-------------------+ | 834 * | | Core +----+ | | Core +----+ | | 835 * | | +--------+ | L2 | | | +--------+ | L2 | | | 836 * | | | Thread | +----+ | | | Thread | +----+ | | 837 * | | +--------+-+ +--+ | | +--------+-+ +--+ | | 838 * | | | Thread | |L1| | | | Thread | |L1| | | 839 * | | +--------+ +--+ | | +--------+ +--+ | | 840 * | +-------------------+ +-------------------+ | 841 * +-------------------------------------------------+ 842 * 843 * While it is not pictured, there are connections from the die to the 844 * broader data fabric and additional functional blocks to support that 845 * communication and coherency. 846 * 847 * CPUID LEAVES 848 * 849 * There are a few different CPUID leaves that we can use to try and understand 850 * the actual state of the world. As part of the introduction of family 0xf, AMD 851 * added CPUID leaf 0x80000008. This leaf tells us the number of logical 852 * processors that are in the system. Because families before Zen didn't have 853 * SMT, this was always the number of cores that were in the system. However, it 854 * should always be thought of as the number of logical threads to be consistent 855 * between generations. In addition we also get the size of the APIC ID that is 856 * used to represent the number of logical processors. This is important for 857 * deriving topology information. 858 * 859 * In the Bulldozer family, AMD added leaf 0x8000001E. The information varies a 860 * bit between Bulldozer and later families, but it is quite useful in 861 * determining the topology information. Because this information has changed 862 * across family generations, it's worth calling out what these mean 863 * explicitly. The registers have the following meanings: 864 * 865 * %eax The APIC ID. The entire register is defined to have a 32-bit 866 * APIC ID, even though on systems without x2apic support, it will 867 * be limited to 8 bits. 868 * 869 * %ebx On Bulldozer-era systems this contains information about the 870 * number of cores that are in a compute unit (cores that share 871 * resources). It also contains a per-package compute unit ID that 872 * identifies which compute unit the logical CPU is a part of. 873 * 874 * On Zen-era systems this instead contains the number of threads 875 * per core and the ID of the core that the logical CPU is a part 876 * of. Note, this ID is unique only to the package, it is not 877 * globally unique across the entire system. 878 * 879 * %ecx This contains the number of nodes that exist in the package. It 880 * also contains an ID that identifies which node the logical CPU 881 * is a part of. 882 * 883 * Finally, we also use cpuid leaf 0x8000001D to determine information about the 884 * cache layout to determine which logical CPUs are sharing which caches. 885 * 886 * illumos Topology 887 * ---------------- 888 * 889 * Based on the above we synthesize the information into several different 890 * variables that we store in the 'struct cpuid_info'. We'll go into the details 891 * of what each member is supposed to represent and their uniqueness. In 892 * general, there are two levels of uniqueness that we care about. We care about 893 * an ID that is globally unique. That means that it will be unique across all 894 * entities in the system. For example, the default logical CPU ID is globally 895 * unique. On the other hand, there is some information that we only care about 896 * being unique within the context of a single package / socket. Here are the 897 * variables that we keep track of and their meaning. 898 * 899 * Several of the values that are asking for an identifier, with the exception 900 * of cpi_apicid, are allowed to be synthetic. 901 * 902 * 903 * cpi_apicid 904 * 905 * This is the value of the CPU's APIC id. This should be the full 32-bit 906 * ID if the CPU is using the x2apic. Otherwise, it should be the 8-bit 907 * APIC ID. This value is globally unique between all logical CPUs across 908 * all packages. This is usually required by the APIC. 909 * 910 * cpi_chipid 911 * 912 * This value indicates the ID of the package that the logical CPU is a 913 * part of. This value is allowed to be synthetic. It is usually derived by 914 * taking the CPU's APIC ID and determining how many bits are used to 915 * represent CPU cores in the package. All logical CPUs that are part of 916 * the same package must have the same value. 917 * 918 * cpi_coreid 919 * 920 * This represents the ID of a CPU core. Two logical CPUs should only have 921 * the same cpi_coreid value if they are part of the same core. These 922 * values may be synthetic. On systems that support SMT, this value is 923 * usually derived from the APIC ID, otherwise it is often synthetic and 924 * just set to the value of the cpu_id in the cpu_t. 925 * 926 * cpi_pkgcoreid 927 * 928 * This is similar to the cpi_coreid in that logical CPUs that are part of 929 * the same core should have the same ID. The main difference is that these 930 * values are only required to be unique to a given socket. 931 * 932 * cpi_clogid 933 * 934 * This represents the logical ID of a logical CPU. This value should be 935 * unique within a given socket for each logical CPU. This is allowed to be 936 * synthetic, though it is usually based off of the CPU's apic ID. The 937 * broader system expects that logical CPUs that have are part of the same 938 * core have contiguous numbers. For example, if there were two threads per 939 * core, then the core IDs divided by two should be the same and the first 940 * modulus two should be zero and the second one. For example, IDs 4 and 5 941 * indicate two logical CPUs that are part of the same core. But IDs 5 and 942 * 6 represent two logical CPUs that are part of different cores. 943 * 944 * While it is common for the cpi_coreid and the cpi_clogid to be derived 945 * from the same source, strictly speaking, they don't have to be and the 946 * two values should be considered logically independent. One should not 947 * try to compare a logical CPU's cpi_coreid and cpi_clogid to determine 948 * some kind of relationship. While this is tempting, we've seen cases on 949 * AMD family 0xf where the system's cpu id is not related to its APIC ID. 950 * 951 * cpi_ncpu_per_chip 952 * 953 * This value indicates the total number of logical CPUs that exist in the 954 * physical package. Critically, this is not the number of logical CPUs 955 * that exist for just the single core. 956 * 957 * This value should be the same for all logical CPUs in the same package. 958 * 959 * cpi_ncore_per_chip 960 * 961 * This value indicates the total number of physical CPU cores that exist 962 * in the package. The system compares this value with cpi_ncpu_per_chip to 963 * determine if simultaneous multi-threading (SMT) is enabled. When 964 * cpi_ncpu_per_chip equals cpi_ncore_per_chip, then there is no SMT and 965 * the X86FSET_HTT feature is not set. If this value is greater than one, 966 * than we consider the processor to have the feature X86FSET_CMP, to 967 * indicate that there is support for more than one core. 968 * 969 * This value should be the same for all logical CPUs in the same package. 970 * 971 * cpi_procnodes_per_pkg 972 * 973 * This value indicates the number of 'nodes' that exist in the package. 974 * When processors are actually a multi-chip module, this represents the 975 * number of such modules that exist in the package. Currently, on Intel 976 * based systems this member is always set to 1. 977 * 978 * This value should be the same for all logical CPUs in the same package. 979 * 980 * cpi_procnodeid 981 * 982 * This value indicates the ID of the node that the logical CPU is a part 983 * of. All logical CPUs that are in the same node must have the same value 984 * here. This value must be unique across all of the packages in the 985 * system. On Intel based systems, this is currently set to the value in 986 * cpi_chipid because there is only one node. 987 * 988 * cpi_cores_per_compunit 989 * 990 * This value indicates the number of cores that are part of a compute 991 * unit. See the AMD topology section for this. This member only has real 992 * meaning currently for AMD Bulldozer family processors. For all other 993 * processors, this should currently be set to 1. 994 * 995 * cpi_compunitid 996 * 997 * This indicates the compute unit that the logical CPU belongs to. For 998 * processors without AMD Bulldozer-style compute units this should be set 999 * to the value of cpi_coreid. 1000 * 1001 * cpi_ncpu_shr_last_cache 1002 * 1003 * This indicates the number of logical CPUs that are sharing the same last 1004 * level cache. This value should be the same for all CPUs that are sharing 1005 * that cache. The last cache refers to the cache that is closest to memory 1006 * and furthest away from the CPU. 1007 * 1008 * cpi_last_lvl_cacheid 1009 * 1010 * This indicates the ID of the last cache that the logical CPU uses. This 1011 * cache is often shared between multiple logical CPUs and is the cache 1012 * that is closest to memory and furthest away from the CPU. This value 1013 * should be the same for a group of logical CPUs only if they actually 1014 * share the same last level cache. IDs should not overlap between 1015 * packages. 1016 * 1017 * cpi_ncore_bits 1018 * 1019 * This indicates the number of bits that are required to represent all of 1020 * the cores in the system. As cores are derived based on their APIC IDs, 1021 * we aren't guaranteed a run of APIC IDs starting from zero. It's OK for 1022 * this value to be larger than the actual number of IDs that are present 1023 * in the system. This is used to size tables by the CMI framework. It is 1024 * only filled in for Intel and AMD CPUs. 1025 * 1026 * cpi_nthread_bits 1027 * 1028 * This indicates the number of bits required to represent all of the IDs 1029 * that cover the logical CPUs that exist on a given core. It's OK for this 1030 * value to be larger than the actual number of IDs that are present in the 1031 * system. This is used to size tables by the CMI framework. It is 1032 * only filled in for Intel and AMD CPUs. 1033 * 1034 * ----------- 1035 * Hypervisors 1036 * ----------- 1037 * 1038 * If trying to manage the differences between vendors wasn't bad enough, it can 1039 * get worse thanks to our friend hardware virtualization. Hypervisors are given 1040 * the ability to interpose on all cpuid instructions and change them to suit 1041 * their purposes. In general, this is necessary as the hypervisor wants to be 1042 * able to present a more uniform set of features or not necessarily give the 1043 * guest operating system kernel knowledge of all features so it can be 1044 * more easily migrated between systems. 1045 * 1046 * When it comes to trying to determine topology information, this can be a 1047 * double edged sword. When a hypervisor doesn't actually implement a cpuid 1048 * leaf, it'll often return all zeros. Because of that, you'll often see various 1049 * checks scattered about fields being non-zero before we assume we can use 1050 * them. 1051 * 1052 * When it comes to topology information, the hypervisor is often incentivized 1053 * to lie to you about topology. This is because it doesn't always actually 1054 * guarantee that topology at all. The topology path we take in the system 1055 * depends on how the CPU advertises itself. If it advertises itself as an Intel 1056 * or AMD CPU, then we basically do our normal path. However, when they don't 1057 * use an actual vendor, then that usually turns into multiple one-core CPUs 1058 * that we enumerate that are often on different sockets. The actual behavior 1059 * depends greatly on what the hypervisor actually exposes to us. 1060 * 1061 * -------------------- 1062 * Exposing Information 1063 * -------------------- 1064 * 1065 * We expose CPUID information in three different forms in the system. 1066 * 1067 * The first is through the x86_featureset variable. This is used in conjunction 1068 * with the is_x86_feature() function. This is queried by x86-specific functions 1069 * to determine which features are or aren't present in the system and to make 1070 * decisions based upon them. For example, users of this include everything from 1071 * parts of the system dedicated to reliability, availability, and 1072 * serviceability (RAS), to making decisions about how to handle security 1073 * mitigations, to various x86-specific drivers. General purpose or 1074 * architecture independent drivers should never be calling this function. 1075 * 1076 * The second means is through the auxiliary vector. The auxiliary vector is a 1077 * series of tagged data that the kernel passes down to a user program when it 1078 * begins executing. This information is used to indicate to programs what 1079 * instruction set extensions are present. For example, information about the 1080 * CPU supporting the machine check architecture (MCA) wouldn't be passed down 1081 * since user programs cannot make use of it. However, things like the AVX 1082 * instruction sets are. Programs use this information to make run-time 1083 * decisions about what features they should use. As an example, the run-time 1084 * link-editor (rtld) can relocate different functions depending on the hardware 1085 * support available. 1086 * 1087 * The final form is through a series of accessor functions that all have the 1088 * form cpuid_get*. This is used by a number of different subsystems in the 1089 * kernel to determine more detailed information about what we're running on, 1090 * topology information, etc. Some of these subsystems include processor groups 1091 * (uts/common/os/pg.c.), CPU Module Interface (uts/i86pc/os/cmi.c), ACPI, 1092 * microcode, and performance monitoring. These functions all ASSERT that the 1093 * CPU they're being called on has reached a certain cpuid pass. If the passes 1094 * are rearranged, then this needs to be adjusted. 1095 * 1096 * ----------------------------------------------- 1097 * Speculative Execution CPU Side Channel Security 1098 * ----------------------------------------------- 1099 * 1100 * With the advent of the Spectre and Meltdown attacks which exploit speculative 1101 * execution in the CPU to create side channels there have been a number of 1102 * different attacks and corresponding issues that the operating system needs to 1103 * mitigate against. The following list is some of the common, but not 1104 * exhaustive, set of issues that we know about and have done some or need to do 1105 * more work in the system to mitigate against: 1106 * 1107 * - Spectre v1 1108 * - swapgs (Spectre v1 variant) 1109 * - Spectre v2 1110 * - Meltdown (Spectre v3) 1111 * - Rogue Register Read (Spectre v3a) 1112 * - Speculative Store Bypass (Spectre v4) 1113 * - ret2spec, SpectreRSB 1114 * - L1 Terminal Fault (L1TF) 1115 * - Microarchitectural Data Sampling (MDS) 1116 * 1117 * Each of these requires different sets of mitigations and has different attack 1118 * surfaces. For the most part, this discussion is about protecting the kernel 1119 * from non-kernel executing environments such as user processes and hardware 1120 * virtual machines. Unfortunately, there are a number of user vs. user 1121 * scenarios that exist with these. The rest of this section will describe the 1122 * overall approach that the system has taken to address these as well as their 1123 * shortcomings. Unfortunately, not all of the above have been handled today. 1124 * 1125 * SPECTRE v2, ret2spec, SpectreRSB 1126 * 1127 * The second variant of the spectre attack focuses on performing branch target 1128 * injection. This generally impacts indirect call instructions in the system. 1129 * There are three different ways to mitigate this issue that are commonly 1130 * described today: 1131 * 1132 * 1. Using Indirect Branch Restricted Speculation (IBRS). 1133 * 2. Using Retpolines and RSB Stuffing 1134 * 3. Using Enhanced Indirect Branch Restricted Speculation (eIBRS) 1135 * 1136 * IBRS uses a feature added to microcode to restrict speculation, among other 1137 * things. This form of mitigation has not been used as it has been generally 1138 * seen as too expensive and requires reactivation upon various transitions in 1139 * the system. 1140 * 1141 * As a less impactful alternative to IBRS, retpolines were developed by 1142 * Google. These basically require one to replace indirect calls with a specific 1143 * trampoline that will cause speculation to fail and break the attack. 1144 * Retpolines require compiler support. We always build with retpolines in the 1145 * external thunk mode. This means that a traditional indirect call is replaced 1146 * with a call to one of the __x86_indirect_thunk_<reg> functions. A side effect 1147 * of this is that all indirect function calls are performed through a register. 1148 * 1149 * We have to use a common external location of the thunk and not inline it into 1150 * the callsite so that way we can have a single place to patch these functions. 1151 * As it turns out, we currently have two different forms of retpolines that 1152 * exist in the system: 1153 * 1154 * 1. A full retpoline 1155 * 2. A no-op version 1156 * 1157 * The first one is used in the general case. Historically, there was an 1158 * AMD-specific optimized retopoline variant that was based around using a 1159 * serializing lfence instruction; however, in March 2022 it was announced that 1160 * this was actually still vulnerable to Spectre v2 and therefore we no longer 1161 * use it and it is no longer available in the system. 1162 * 1163 * The third form described above is the most curious. It turns out that the way 1164 * that retpolines are implemented is that they rely on how speculation is 1165 * performed on a 'ret' instruction. Intel has continued to optimize this 1166 * process (which is partly why we need to have return stack buffer stuffing, 1167 * but more on that in a bit) and in processors starting with Cascade Lake 1168 * on the server side, it's dangerous to rely on retpolines. Instead, a new 1169 * mechanism has been introduced called Enhanced IBRS (eIBRS). 1170 * 1171 * Unlike IBRS, eIBRS is designed to be enabled once at boot and left on each 1172 * physical core. However, if this is the case, we don't want to use retpolines 1173 * any more. Therefore if eIBRS is present, we end up turning each retpoline 1174 * function (called a thunk) into a jmp instruction. This means that we're still 1175 * paying the cost of an extra jump to the external thunk, but it gives us 1176 * flexibility and the ability to have a single kernel image that works across a 1177 * wide variety of systems and hardware features. 1178 * 1179 * Unfortunately, this alone is insufficient. First, Skylake systems have 1180 * additional speculation for the Return Stack Buffer (RSB) which is used to 1181 * return from call instructions which retpolines take advantage of. However, 1182 * this problem is not just limited to Skylake and is actually more pernicious. 1183 * The SpectreRSB paper introduces several more problems that can arise with 1184 * dealing with this. The RSB can be poisoned just like the indirect branch 1185 * predictor. This means that one needs to clear the RSB when transitioning 1186 * between two different privilege domains. Some examples include: 1187 * 1188 * - Switching between two different user processes 1189 * - Going between user land and the kernel 1190 * - Returning to the kernel from a hardware virtual machine 1191 * 1192 * Mitigating this involves combining a couple of different things. The first is 1193 * SMEP (supervisor mode execution protection) which was introduced in Ivy 1194 * Bridge. When an RSB entry refers to a user address and we're executing in the 1195 * kernel, speculation through it will be stopped when SMEP is enabled. This 1196 * protects against a number of the different cases that we would normally be 1197 * worried about such as when we enter the kernel from user land. 1198 * 1199 * To prevent against additional manipulation of the RSB from other contexts 1200 * such as a non-root VMX context attacking the kernel we first look to 1201 * enhanced IBRS. When eIBRS is present and enabled, then there should be 1202 * nothing else that we need to do to protect the kernel at this time. 1203 * 1204 * Unfortunately, eIBRS or not, we need to manually overwrite the contents of 1205 * the return stack buffer. We do this through the x86_rsb_stuff() function. 1206 * Currently this is employed on context switch and vmx_exit. The 1207 * x86_rsb_stuff() function is disabled only when mitigations in general are. 1208 * 1209 * If SMEP is not present, then we would have to stuff the RSB every time we 1210 * transitioned from user mode to the kernel, which isn't very practical right 1211 * now. 1212 * 1213 * To fully protect user to user and vmx to vmx attacks from these classes of 1214 * issues, we would also need to allow them to opt into performing an Indirect 1215 * Branch Prediction Barrier (IBPB) on switch. This is not currently wired up. 1216 * 1217 * By default, the system will enable RSB stuffing and the required variant of 1218 * retpolines and store that information in the x86_spectrev2_mitigation value. 1219 * This will be evaluated after a microcode update as well, though it is 1220 * expected that microcode updates will not take away features. This may mean 1221 * that a late loaded microcode may not end up in the optimal configuration 1222 * (though this should be rare). 1223 * 1224 * Currently we do not build kmdb with retpolines or perform any additional side 1225 * channel security mitigations for it. One complication with kmdb is that it 1226 * requires its own retpoline thunks and it would need to adjust itself based on 1227 * what the kernel does. The threat model of kmdb is more limited and therefore 1228 * it may make more sense to investigate using prediction barriers as the whole 1229 * system is only executing a single instruction at a time while in kmdb. 1230 * 1231 * SPECTRE v1, v4 1232 * 1233 * The v1 and v4 variants of spectre are not currently mitigated in the 1234 * system and require other classes of changes to occur in the code. 1235 * 1236 * SPECTRE v1 (SWAPGS VARIANT) 1237 * 1238 * The class of Spectre v1 vulnerabilities aren't all about bounds checks, but 1239 * can generally affect any branch-dependent code. The swapgs issue is one 1240 * variant of this. If we are coming in from userspace, we can have code like 1241 * this: 1242 * 1243 * cmpw $KCS_SEL, REGOFF_CS(%rsp) 1244 * je 1f 1245 * movq $0, REGOFF_SAVFP(%rsp) 1246 * swapgs 1247 * 1: 1248 * movq %gs:CPU_THREAD, %rax 1249 * 1250 * If an attacker can cause a mis-speculation of the branch here, we could skip 1251 * the needed swapgs, and use the /user/ %gsbase as the base of the %gs-based 1252 * load. If subsequent code can act as the usual Spectre cache gadget, this 1253 * would potentially allow KPTI bypass. To fix this, we need an lfence prior to 1254 * any use of the %gs override. 1255 * 1256 * The other case is also an issue: if we're coming into a trap from kernel 1257 * space, we could mis-speculate and swapgs the user %gsbase back in prior to 1258 * using it. AMD systems are not vulnerable to this version, as a swapgs is 1259 * serializing with respect to subsequent uses. But as AMD /does/ need the other 1260 * case, and the fix is the same in both cases (an lfence at the branch target 1261 * 1: in this example), we'll just do it unconditionally. 1262 * 1263 * Note that we don't enable user-space "wrgsbase" via CR4_FSGSBASE, making it 1264 * harder for user-space to actually set a useful %gsbase value: although it's 1265 * not clear, it might still be feasible via lwp_setprivate(), though, so we 1266 * mitigate anyway. 1267 * 1268 * MELTDOWN 1269 * 1270 * Meltdown, or spectre v3, allowed a user process to read any data in their 1271 * address space regardless of whether or not the page tables in question 1272 * allowed the user to have the ability to read them. The solution to meltdown 1273 * is kernel page table isolation. In this world, there are two page tables that 1274 * are used for a process, one in user land and one in the kernel. To implement 1275 * this we use per-CPU page tables and switch between the user and kernel 1276 * variants when entering and exiting the kernel. For more information about 1277 * this process and how the trampolines work, please see the big theory 1278 * statements and additional comments in: 1279 * 1280 * - uts/i86pc/ml/kpti_trampolines.s 1281 * - uts/i86pc/vm/hat_i86.c 1282 * 1283 * While Meltdown only impacted Intel systems and there are also Intel systems 1284 * that have Meltdown fixed (called Rogue Data Cache Load), we always have 1285 * kernel page table isolation enabled. While this may at first seem weird, an 1286 * important thing to remember is that you can't speculatively read an address 1287 * if it's never in your page table at all. Having user processes without kernel 1288 * pages present provides us with an important layer of defense in the kernel 1289 * against any other side channel attacks that exist and have yet to be 1290 * discovered. As such, kernel page table isolation (KPTI) is always enabled by 1291 * default, no matter the x86 system. 1292 * 1293 * L1 TERMINAL FAULT 1294 * 1295 * L1 Terminal Fault (L1TF) takes advantage of an issue in how speculative 1296 * execution uses page table entries. Effectively, it is two different problems. 1297 * The first is that it ignores the not present bit in the page table entries 1298 * when performing speculative execution. This means that something can 1299 * speculatively read the listed physical address if it's present in the L1 1300 * cache under certain conditions (see Intel's documentation for the full set of 1301 * conditions). Secondly, this can be used to bypass hardware virtualization 1302 * extended page tables (EPT) that are part of Intel's hardware virtual machine 1303 * instructions. 1304 * 1305 * For the non-hardware virtualized case, this is relatively easy to deal with. 1306 * We must make sure that all unmapped pages have an address of zero. This means 1307 * that they could read the first 4k of physical memory; however, we never use 1308 * that first page in the operating system and always skip putting it in our 1309 * memory map, even if firmware tells us we can use it in our memory map. While 1310 * other systems try to put extra metadata in the address and reserved bits, 1311 * which led to this being problematic in those cases, we do not. 1312 * 1313 * For hardware virtual machines things are more complicated. Because they can 1314 * construct their own page tables, it isn't hard for them to perform this 1315 * attack against any physical address. The one wrinkle is that this physical 1316 * address must be in the L1 data cache. Thus Intel added an MSR that we can use 1317 * to flush the L1 data cache. We wrap this up in the function 1318 * spec_uarch_flush(). This function is also used in the mitigation of 1319 * microarchitectural data sampling (MDS) discussed later on. Kernel based 1320 * hypervisors such as KVM or bhyve are responsible for performing this before 1321 * entering the guest. 1322 * 1323 * Because this attack takes place in the L1 cache, there's another wrinkle 1324 * here. The L1 cache is shared between all logical CPUs in a core in most Intel 1325 * designs. This means that when a thread enters a hardware virtualized context 1326 * and flushes the L1 data cache, the other thread on the processor may then go 1327 * ahead and put new data in it that can be potentially attacked. While one 1328 * solution is to disable SMT on the system, another option that is available is 1329 * to use a feature for hardware virtualization called 'SMT exclusion'. This 1330 * goes through and makes sure that if a HVM is being scheduled on one thread, 1331 * then the thing on the other thread is from the same hardware virtual machine. 1332 * If an interrupt comes in or the guest exits to the broader system, then the 1333 * other SMT thread will be kicked out. 1334 * 1335 * L1TF can be fully mitigated by hardware. If the RDCL_NO feature is set in the 1336 * architecture capabilities MSR (MSR_IA32_ARCH_CAPABILITIES), then we will not 1337 * perform L1TF related mitigations. 1338 * 1339 * MICROARCHITECTURAL DATA SAMPLING 1340 * 1341 * Microarchitectural data sampling (MDS) is a combination of four discrete 1342 * vulnerabilities that are similar issues affecting various parts of the CPU's 1343 * microarchitectural implementation around load, store, and fill buffers. 1344 * Specifically it is made up of the following subcomponents: 1345 * 1346 * 1. Microarchitectural Store Buffer Data Sampling (MSBDS) 1347 * 2. Microarchitectural Fill Buffer Data Sampling (MFBDS) 1348 * 3. Microarchitectural Load Port Data Sampling (MLPDS) 1349 * 4. Microarchitectural Data Sampling Uncacheable Memory (MDSUM) 1350 * 1351 * To begin addressing these, Intel has introduced another feature in microcode 1352 * called MD_CLEAR. This changes the verw instruction to operate in a different 1353 * way. This allows us to execute the verw instruction in a particular way to 1354 * flush the state of the affected parts. The L1TF L1D flush mechanism is also 1355 * updated when this microcode is present to flush this state. 1356 * 1357 * Primarily we need to flush this state whenever we transition from the kernel 1358 * to a less privileged context such as user mode or an HVM guest. MSBDS is a 1359 * little bit different. Here the structures are statically sized when a logical 1360 * CPU is in use and resized when it goes to sleep. Therefore, we also need to 1361 * flush the microarchitectural state before the CPU goes idles by calling hlt, 1362 * mwait, or another ACPI method. To perform these flushes, we call 1363 * x86_md_clear() at all of these transition points. 1364 * 1365 * If hardware enumerates RDCL_NO, indicating that it is not vulnerable to L1TF, 1366 * then we change the spec_uarch_flush() function to point to x86_md_clear(). If 1367 * MDS_NO has been set, then this is fully mitigated and x86_md_clear() becomes 1368 * a no-op. 1369 * 1370 * Unfortunately, with this issue hyperthreading rears its ugly head. In 1371 * particular, everything we've discussed above is only valid for a single 1372 * thread executing on a core. In the case where you have hyper-threading 1373 * present, this attack can be performed between threads. The theoretical fix 1374 * for this is to ensure that both threads are always in the same security 1375 * domain. This means that they are executing in the same ring and mutually 1376 * trust each other. Practically speaking, this would mean that a system call 1377 * would have to issue an inter-processor interrupt (IPI) to the other thread. 1378 * Rather than implement this, we recommend that one disables hyper-threading 1379 * through the use of psradm -aS. 1380 * 1381 * TSX ASYNCHRONOUS ABORT 1382 * 1383 * TSX Asynchronous Abort (TAA) is another side-channel vulnerability that 1384 * behaves like MDS, but leverages Intel's transactional instructions as another 1385 * vector. Effectively, when a transaction hits one of these cases (unmapped 1386 * page, various cache snoop activity, etc.) then the same data can be exposed 1387 * as in the case of MDS. This means that you can attack your twin. 1388 * 1389 * Intel has described that there are two different ways that we can mitigate 1390 * this problem on affected processors: 1391 * 1392 * 1) We can use the same techniques used to deal with MDS. Flushing the 1393 * microarchitectural buffers and disabling hyperthreading will mitigate 1394 * this in the same way. 1395 * 1396 * 2) Using microcode to disable TSX. 1397 * 1398 * Now, most processors that are subject to MDS (as in they don't have MDS_NO in 1399 * the IA32_ARCH_CAPABILITIES MSR) will not receive microcode to disable TSX. 1400 * That's OK as we're already doing all such mitigations. On the other hand, 1401 * processors with MDS_NO are all supposed to receive microcode updates that 1402 * enumerate support for disabling TSX. In general, we'd rather use this method 1403 * when available as it doesn't require disabling hyperthreading to be 1404 * effective. Currently we basically are relying on microcode for processors 1405 * that enumerate MDS_NO. 1406 * 1407 * The microcode features are enumerated as part of the IA32_ARCH_CAPABILITIES. 1408 * When bit 7 (IA32_ARCH_CAP_TSX_CTRL) is present, then we are given two 1409 * different powers. The first allows us to cause all transactions to 1410 * immediately abort. The second gives us a means of disabling TSX completely, 1411 * which includes removing it from cpuid. If we have support for this in 1412 * microcode during the first cpuid pass, then we'll disable TSX completely such 1413 * that user land never has a chance to observe the bit. However, if we are late 1414 * loading the microcode, then we must use the functionality to cause 1415 * transactions to automatically abort. This is necessary for user land's sake. 1416 * Once a program sees a cpuid bit, it must not be taken away. 1417 * 1418 * We track whether or not we should do this based on what cpuid pass we're in. 1419 * Whenever we hit cpuid_scan_security() on the boot CPU and we're still on pass 1420 * 1 of the cpuid logic, then we can completely turn off TSX. Notably this 1421 * should happen twice. Once in the normal cpuid_pass_basic() code and then a 1422 * second time after we do the initial microcode update. As a result we need to 1423 * be careful in cpuid_apply_tsx() to only use the MSR if we've loaded a 1424 * suitable microcode on the current CPU (which happens prior to 1425 * cpuid_pass_ucode()). 1426 * 1427 * If TAA has been fixed, then it will be enumerated in IA32_ARCH_CAPABILITIES 1428 * as TAA_NO. In such a case, we will still disable TSX: it's proven to be an 1429 * unfortunate feature in a number of ways, and taking the opportunity to 1430 * finally be able to turn it off is likely to be of benefit in the future. 1431 * 1432 * SUMMARY 1433 * 1434 * The following table attempts to summarize the mitigations for various issues 1435 * and what's done in various places: 1436 * 1437 * - Spectre v1: Not currently mitigated 1438 * - swapgs: lfences after swapgs paths 1439 * - Spectre v2: Retpolines/RSB Stuffing or eIBRS if HW support 1440 * - Meltdown: Kernel Page Table Isolation 1441 * - Spectre v3a: Updated CPU microcode 1442 * - Spectre v4: Not currently mitigated 1443 * - SpectreRSB: SMEP and RSB Stuffing 1444 * - L1TF: spec_uarch_flush, SMT exclusion, requires microcode 1445 * - MDS: x86_md_clear, requires microcode, disabling SMT 1446 * - TAA: x86_md_clear and disabling SMT OR microcode and disabling TSX 1447 * 1448 * The following table indicates the x86 feature set bits that indicate that a 1449 * given problem has been solved or a notable feature is present: 1450 * 1451 * - RDCL_NO: Meltdown, L1TF, MSBDS subset of MDS 1452 * - MDS_NO: All forms of MDS 1453 * - TAA_NO: TAA 1454 */ 1455 1456 #include <sys/types.h> 1457 #include <sys/archsystm.h> 1458 #include <sys/x86_archext.h> 1459 #include <sys/kmem.h> 1460 #include <sys/systm.h> 1461 #include <sys/cmn_err.h> 1462 #include <sys/sunddi.h> 1463 #include <sys/sunndi.h> 1464 #include <sys/cpuvar.h> 1465 #include <sys/processor.h> 1466 #include <sys/sysmacros.h> 1467 #include <sys/pg.h> 1468 #include <sys/fp.h> 1469 #include <sys/controlregs.h> 1470 #include <sys/bitmap.h> 1471 #include <sys/auxv_386.h> 1472 #include <sys/memnode.h> 1473 #include <sys/pci_cfgspace.h> 1474 #include <sys/comm_page.h> 1475 #include <sys/mach_mmu.h> 1476 #include <sys/ucode.h> 1477 #include <sys/tsc.h> 1478 #include <sys/kobj.h> 1479 #include <sys/asm_misc.h> 1480 1481 #ifdef __xpv 1482 #include <sys/hypervisor.h> 1483 #else 1484 #include <sys/ontrap.h> 1485 #endif 1486 1487 uint_t x86_vendor = X86_VENDOR_IntelClone; 1488 uint_t x86_type = X86_TYPE_OTHER; 1489 uint_t x86_clflush_size = 0; 1490 1491 #if defined(__xpv) 1492 int x86_use_pcid = 0; 1493 int x86_use_invpcid = 0; 1494 #else 1495 int x86_use_pcid = -1; 1496 int x86_use_invpcid = -1; 1497 #endif 1498 1499 typedef enum { 1500 X86_SPECTREV2_RETPOLINE, 1501 X86_SPECTREV2_ENHANCED_IBRS, 1502 X86_SPECTREV2_DISABLED 1503 } x86_spectrev2_mitigation_t; 1504 1505 uint_t x86_disable_spectrev2 = 0; 1506 static x86_spectrev2_mitigation_t x86_spectrev2_mitigation = 1507 X86_SPECTREV2_RETPOLINE; 1508 1509 /* 1510 * The mitigation status for TAA: 1511 * X86_TAA_NOTHING -- no mitigation available for TAA side-channels 1512 * X86_TAA_DISABLED -- mitigation disabled via x86_disable_taa 1513 * X86_TAA_MD_CLEAR -- MDS mitigation also suffices for TAA 1514 * X86_TAA_TSX_FORCE_ABORT -- transactions are forced to abort 1515 * X86_TAA_TSX_DISABLE -- force abort transactions and hide from CPUID 1516 * X86_TAA_HW_MITIGATED -- TSX potentially active but H/W not TAA-vulnerable 1517 */ 1518 typedef enum { 1519 X86_TAA_NOTHING, 1520 X86_TAA_DISABLED, 1521 X86_TAA_MD_CLEAR, 1522 X86_TAA_TSX_FORCE_ABORT, 1523 X86_TAA_TSX_DISABLE, 1524 X86_TAA_HW_MITIGATED 1525 } x86_taa_mitigation_t; 1526 1527 uint_t x86_disable_taa = 0; 1528 static x86_taa_mitigation_t x86_taa_mitigation = X86_TAA_NOTHING; 1529 1530 uint_t pentiumpro_bug4046376; 1531 1532 uchar_t x86_featureset[BT_SIZEOFMAP(NUM_X86_FEATURES)]; 1533 1534 static char *x86_feature_names[NUM_X86_FEATURES] = { 1535 "lgpg", 1536 "tsc", 1537 "msr", 1538 "mtrr", 1539 "pge", 1540 "de", 1541 "cmov", 1542 "mmx", 1543 "mca", 1544 "pae", 1545 "cv8", 1546 "pat", 1547 "sep", 1548 "sse", 1549 "sse2", 1550 "htt", 1551 "asysc", 1552 "nx", 1553 "sse3", 1554 "cx16", 1555 "cmp", 1556 "tscp", 1557 "mwait", 1558 "sse4a", 1559 "cpuid", 1560 "ssse3", 1561 "sse4_1", 1562 "sse4_2", 1563 "1gpg", 1564 "clfsh", 1565 "64", 1566 "aes", 1567 "pclmulqdq", 1568 "xsave", 1569 "avx", 1570 "vmx", 1571 "svm", 1572 "topoext", 1573 "f16c", 1574 "rdrand", 1575 "x2apic", 1576 "avx2", 1577 "bmi1", 1578 "bmi2", 1579 "fma", 1580 "smep", 1581 "smap", 1582 "adx", 1583 "rdseed", 1584 "mpx", 1585 "avx512f", 1586 "avx512dq", 1587 "avx512pf", 1588 "avx512er", 1589 "avx512cd", 1590 "avx512bw", 1591 "avx512vl", 1592 "avx512fma", 1593 "avx512vbmi", 1594 "avx512_vpopcntdq", 1595 "avx512_4vnniw", 1596 "avx512_4fmaps", 1597 "xsaveopt", 1598 "xsavec", 1599 "xsaves", 1600 "sha", 1601 "umip", 1602 "pku", 1603 "ospke", 1604 "pcid", 1605 "invpcid", 1606 "ibrs", 1607 "ibpb", 1608 "stibp", 1609 "ssbd", 1610 "ssbd_virt", 1611 "rdcl_no", 1612 "ibrs_all", 1613 "rsba", 1614 "ssb_no", 1615 "stibp_all", 1616 "flush_cmd", 1617 "l1d_vmentry_no", 1618 "fsgsbase", 1619 "clflushopt", 1620 "clwb", 1621 "monitorx", 1622 "clzero", 1623 "xop", 1624 "fma4", 1625 "tbm", 1626 "avx512_vnni", 1627 "amd_pcec", 1628 "md_clear", 1629 "mds_no", 1630 "core_thermal", 1631 "pkg_thermal", 1632 "tsx_ctrl", 1633 "taa_no", 1634 "ppin", 1635 "vaes", 1636 "vpclmulqdq", 1637 "lfence_serializing", 1638 "gfni", 1639 "avx512_vp2intersect", 1640 "avx512_bitalg", 1641 "avx512_vbmi2", 1642 "avx512_bf16" 1643 }; 1644 1645 boolean_t 1646 is_x86_feature(void *featureset, uint_t feature) 1647 { 1648 ASSERT(feature < NUM_X86_FEATURES); 1649 return (BT_TEST((ulong_t *)featureset, feature)); 1650 } 1651 1652 void 1653 add_x86_feature(void *featureset, uint_t feature) 1654 { 1655 ASSERT(feature < NUM_X86_FEATURES); 1656 BT_SET((ulong_t *)featureset, feature); 1657 } 1658 1659 void 1660 remove_x86_feature(void *featureset, uint_t feature) 1661 { 1662 ASSERT(feature < NUM_X86_FEATURES); 1663 BT_CLEAR((ulong_t *)featureset, feature); 1664 } 1665 1666 boolean_t 1667 compare_x86_featureset(void *setA, void *setB) 1668 { 1669 /* 1670 * We assume that the unused bits of the bitmap are always zero. 1671 */ 1672 if (memcmp(setA, setB, BT_SIZEOFMAP(NUM_X86_FEATURES)) == 0) { 1673 return (B_TRUE); 1674 } else { 1675 return (B_FALSE); 1676 } 1677 } 1678 1679 void 1680 print_x86_featureset(void *featureset) 1681 { 1682 uint_t i; 1683 1684 for (i = 0; i < NUM_X86_FEATURES; i++) { 1685 if (is_x86_feature(featureset, i)) { 1686 cmn_err(CE_CONT, "?x86_feature: %s\n", 1687 x86_feature_names[i]); 1688 } 1689 } 1690 } 1691 1692 /* Note: This is the maximum size for the CPU, not the size of the structure. */ 1693 static size_t xsave_state_size = 0; 1694 uint64_t xsave_bv_all = (XFEATURE_LEGACY_FP | XFEATURE_SSE); 1695 boolean_t xsave_force_disable = B_FALSE; 1696 extern int disable_smap; 1697 1698 /* 1699 * This is set to platform type we are running on. 1700 */ 1701 static int platform_type = -1; 1702 1703 #if !defined(__xpv) 1704 /* 1705 * Variable to patch if hypervisor platform detection needs to be 1706 * disabled (e.g. platform_type will always be HW_NATIVE if this is 0). 1707 */ 1708 int enable_platform_detection = 1; 1709 #endif 1710 1711 /* 1712 * monitor/mwait info. 1713 * 1714 * size_actual and buf_actual are the real address and size allocated to get 1715 * proper mwait_buf alignement. buf_actual and size_actual should be passed 1716 * to kmem_free(). Currently kmem_alloc() and mwait happen to both use 1717 * processor cache-line alignment, but this is not guarantied in the furture. 1718 */ 1719 struct mwait_info { 1720 size_t mon_min; /* min size to avoid missed wakeups */ 1721 size_t mon_max; /* size to avoid false wakeups */ 1722 size_t size_actual; /* size actually allocated */ 1723 void *buf_actual; /* memory actually allocated */ 1724 uint32_t support; /* processor support of monitor/mwait */ 1725 }; 1726 1727 /* 1728 * xsave/xrestor info. 1729 * 1730 * This structure contains HW feature bits and the size of the xsave save area. 1731 * Note: the kernel declares a fixed size (AVX_XSAVE_SIZE) structure 1732 * (xsave_state) to describe the xsave layout. However, at runtime the 1733 * per-lwp xsave area is dynamically allocated based on xsav_max_size. The 1734 * xsave_state structure simply represents the legacy layout of the beginning 1735 * of the xsave area. 1736 */ 1737 struct xsave_info { 1738 uint32_t xsav_hw_features_low; /* Supported HW features */ 1739 uint32_t xsav_hw_features_high; /* Supported HW features */ 1740 size_t xsav_max_size; /* max size save area for HW features */ 1741 size_t ymm_size; /* AVX: size of ymm save area */ 1742 size_t ymm_offset; /* AVX: offset for ymm save area */ 1743 size_t bndregs_size; /* MPX: size of bndregs save area */ 1744 size_t bndregs_offset; /* MPX: offset for bndregs save area */ 1745 size_t bndcsr_size; /* MPX: size of bndcsr save area */ 1746 size_t bndcsr_offset; /* MPX: offset for bndcsr save area */ 1747 size_t opmask_size; /* AVX512: size of opmask save */ 1748 size_t opmask_offset; /* AVX512: offset for opmask save */ 1749 size_t zmmlo_size; /* AVX512: size of zmm 256 save */ 1750 size_t zmmlo_offset; /* AVX512: offset for zmm 256 save */ 1751 size_t zmmhi_size; /* AVX512: size of zmm hi reg save */ 1752 size_t zmmhi_offset; /* AVX512: offset for zmm hi reg save */ 1753 }; 1754 1755 1756 /* 1757 * These constants determine how many of the elements of the 1758 * cpuid we cache in the cpuid_info data structure; the 1759 * remaining elements are accessible via the cpuid instruction. 1760 */ 1761 1762 #define NMAX_CPI_STD 8 /* eax = 0 .. 7 */ 1763 #define NMAX_CPI_EXTD 0x1f /* eax = 0x80000000 .. 0x8000001e */ 1764 1765 /* 1766 * See the big theory statement for a more detailed explanation of what some of 1767 * these members mean. 1768 */ 1769 struct cpuid_info { 1770 uint_t cpi_pass; /* last pass completed */ 1771 /* 1772 * standard function information 1773 */ 1774 uint_t cpi_maxeax; /* fn 0: %eax */ 1775 char cpi_vendorstr[13]; /* fn 0: %ebx:%ecx:%edx */ 1776 uint_t cpi_vendor; /* enum of cpi_vendorstr */ 1777 1778 uint_t cpi_family; /* fn 1: extended family */ 1779 uint_t cpi_model; /* fn 1: extended model */ 1780 uint_t cpi_step; /* fn 1: stepping */ 1781 chipid_t cpi_chipid; /* fn 1: %ebx: Intel: chip # */ 1782 /* AMD: package/socket # */ 1783 uint_t cpi_brandid; /* fn 1: %ebx: brand ID */ 1784 int cpi_clogid; /* fn 1: %ebx: thread # */ 1785 uint_t cpi_ncpu_per_chip; /* fn 1: %ebx: logical cpu count */ 1786 uint8_t cpi_cacheinfo[16]; /* fn 2: intel-style cache desc */ 1787 uint_t cpi_ncache; /* fn 2: number of elements */ 1788 uint_t cpi_ncpu_shr_last_cache; /* fn 4: %eax: ncpus sharing cache */ 1789 id_t cpi_last_lvl_cacheid; /* fn 4: %eax: derived cache id */ 1790 uint_t cpi_cache_leaf_size; /* Number of cache elements */ 1791 /* Intel fn: 4, AMD fn: 8000001d */ 1792 struct cpuid_regs **cpi_cache_leaves; /* Acual leaves from above */ 1793 struct cpuid_regs cpi_std[NMAX_CPI_STD]; /* 0 .. 7 */ 1794 struct cpuid_regs cpi_sub7[1]; /* Leaf 7, sub-leaf 1 */ 1795 /* 1796 * extended function information 1797 */ 1798 uint_t cpi_xmaxeax; /* fn 0x80000000: %eax */ 1799 char cpi_brandstr[49]; /* fn 0x8000000[234] */ 1800 uint8_t cpi_pabits; /* fn 0x80000006: %eax */ 1801 uint8_t cpi_vabits; /* fn 0x80000006: %eax */ 1802 uint8_t cpi_fp_amd_save; /* AMD: FP error pointer save rqd. */ 1803 struct cpuid_regs cpi_extd[NMAX_CPI_EXTD]; /* 0x800000XX */ 1804 1805 id_t cpi_coreid; /* same coreid => strands share core */ 1806 int cpi_pkgcoreid; /* core number within single package */ 1807 uint_t cpi_ncore_per_chip; /* AMD: fn 0x80000008: %ecx[7-0] */ 1808 /* Intel: fn 4: %eax[31-26] */ 1809 1810 /* 1811 * These values represent the number of bits that are required to store 1812 * information about the number of cores and threads. 1813 */ 1814 uint_t cpi_ncore_bits; 1815 uint_t cpi_nthread_bits; 1816 /* 1817 * supported feature information 1818 */ 1819 uint32_t cpi_support[6]; 1820 #define STD_EDX_FEATURES 0 1821 #define AMD_EDX_FEATURES 1 1822 #define TM_EDX_FEATURES 2 1823 #define STD_ECX_FEATURES 3 1824 #define AMD_ECX_FEATURES 4 1825 #define STD_EBX_FEATURES 5 1826 /* 1827 * Synthesized information, where known. 1828 */ 1829 x86_chiprev_t cpi_chiprev; /* See X86_CHIPREV_* in x86_archext.h */ 1830 const char *cpi_chiprevstr; /* May be NULL if chiprev unknown */ 1831 uint32_t cpi_socket; /* Chip package/socket type */ 1832 x86_uarchrev_t cpi_uarchrev; /* Microarchitecture and revision */ 1833 1834 struct mwait_info cpi_mwait; /* fn 5: monitor/mwait info */ 1835 uint32_t cpi_apicid; 1836 uint_t cpi_procnodeid; /* AMD: nodeID on HT, Intel: chipid */ 1837 uint_t cpi_procnodes_per_pkg; /* AMD: # of nodes in the package */ 1838 /* Intel: 1 */ 1839 uint_t cpi_compunitid; /* AMD: ComputeUnit ID, Intel: coreid */ 1840 uint_t cpi_cores_per_compunit; /* AMD: # of cores in the ComputeUnit */ 1841 1842 struct xsave_info cpi_xsave; /* fn D: xsave/xrestor info */ 1843 }; 1844 1845 1846 static struct cpuid_info cpuid_info0; 1847 1848 /* 1849 * These bit fields are defined by the Intel Application Note AP-485 1850 * "Intel Processor Identification and the CPUID Instruction" 1851 */ 1852 #define CPI_FAMILY_XTD(cpi) BITX((cpi)->cpi_std[1].cp_eax, 27, 20) 1853 #define CPI_MODEL_XTD(cpi) BITX((cpi)->cpi_std[1].cp_eax, 19, 16) 1854 #define CPI_TYPE(cpi) BITX((cpi)->cpi_std[1].cp_eax, 13, 12) 1855 #define CPI_FAMILY(cpi) BITX((cpi)->cpi_std[1].cp_eax, 11, 8) 1856 #define CPI_STEP(cpi) BITX((cpi)->cpi_std[1].cp_eax, 3, 0) 1857 #define CPI_MODEL(cpi) BITX((cpi)->cpi_std[1].cp_eax, 7, 4) 1858 1859 #define CPI_FEATURES_EDX(cpi) ((cpi)->cpi_std[1].cp_edx) 1860 #define CPI_FEATURES_ECX(cpi) ((cpi)->cpi_std[1].cp_ecx) 1861 #define CPI_FEATURES_XTD_EDX(cpi) ((cpi)->cpi_extd[1].cp_edx) 1862 #define CPI_FEATURES_XTD_ECX(cpi) ((cpi)->cpi_extd[1].cp_ecx) 1863 #define CPI_FEATURES_7_0_EBX(cpi) ((cpi)->cpi_std[7].cp_ebx) 1864 #define CPI_FEATURES_7_0_ECX(cpi) ((cpi)->cpi_std[7].cp_ecx) 1865 #define CPI_FEATURES_7_0_EDX(cpi) ((cpi)->cpi_std[7].cp_edx) 1866 #define CPI_FEATURES_7_1_EAX(cpi) ((cpi)->cpi_sub7[0].cp_eax) 1867 1868 #define CPI_BRANDID(cpi) BITX((cpi)->cpi_std[1].cp_ebx, 7, 0) 1869 #define CPI_CHUNKS(cpi) BITX((cpi)->cpi_std[1].cp_ebx, 15, 7) 1870 #define CPI_CPU_COUNT(cpi) BITX((cpi)->cpi_std[1].cp_ebx, 23, 16) 1871 #define CPI_APIC_ID(cpi) BITX((cpi)->cpi_std[1].cp_ebx, 31, 24) 1872 1873 #define CPI_MAXEAX_MAX 0x100 /* sanity control */ 1874 #define CPI_XMAXEAX_MAX 0x80000100 1875 #define CPI_FN4_ECX_MAX 0x20 /* sanity: max fn 4 levels */ 1876 #define CPI_FNB_ECX_MAX 0x20 /* sanity: max fn B levels */ 1877 1878 /* 1879 * Function 4 (Deterministic Cache Parameters) macros 1880 * Defined by Intel Application Note AP-485 1881 */ 1882 #define CPI_NUM_CORES(regs) BITX((regs)->cp_eax, 31, 26) 1883 #define CPI_NTHR_SHR_CACHE(regs) BITX((regs)->cp_eax, 25, 14) 1884 #define CPI_FULL_ASSOC_CACHE(regs) BITX((regs)->cp_eax, 9, 9) 1885 #define CPI_SELF_INIT_CACHE(regs) BITX((regs)->cp_eax, 8, 8) 1886 #define CPI_CACHE_LVL(regs) BITX((regs)->cp_eax, 7, 5) 1887 #define CPI_CACHE_TYPE(regs) BITX((regs)->cp_eax, 4, 0) 1888 #define CPI_CPU_LEVEL_TYPE(regs) BITX((regs)->cp_ecx, 15, 8) 1889 1890 #define CPI_CACHE_WAYS(regs) BITX((regs)->cp_ebx, 31, 22) 1891 #define CPI_CACHE_PARTS(regs) BITX((regs)->cp_ebx, 21, 12) 1892 #define CPI_CACHE_COH_LN_SZ(regs) BITX((regs)->cp_ebx, 11, 0) 1893 1894 #define CPI_CACHE_SETS(regs) BITX((regs)->cp_ecx, 31, 0) 1895 1896 #define CPI_PREFCH_STRIDE(regs) BITX((regs)->cp_edx, 9, 0) 1897 1898 1899 /* 1900 * A couple of shorthand macros to identify "later" P6-family chips 1901 * like the Pentium M and Core. First, the "older" P6-based stuff 1902 * (loosely defined as "pre-Pentium-4"): 1903 * P6, PII, Mobile PII, PII Xeon, PIII, Mobile PIII, PIII Xeon 1904 */ 1905 #define IS_LEGACY_P6(cpi) ( \ 1906 cpi->cpi_family == 6 && \ 1907 (cpi->cpi_model == 1 || \ 1908 cpi->cpi_model == 3 || \ 1909 cpi->cpi_model == 5 || \ 1910 cpi->cpi_model == 6 || \ 1911 cpi->cpi_model == 7 || \ 1912 cpi->cpi_model == 8 || \ 1913 cpi->cpi_model == 0xA || \ 1914 cpi->cpi_model == 0xB) \ 1915 ) 1916 1917 /* A "new F6" is everything with family 6 that's not the above */ 1918 #define IS_NEW_F6(cpi) ((cpi->cpi_family == 6) && !IS_LEGACY_P6(cpi)) 1919 1920 /* Extended family/model support */ 1921 #define IS_EXTENDED_MODEL_INTEL(cpi) (cpi->cpi_family == 0x6 || \ 1922 cpi->cpi_family >= 0xf) 1923 1924 /* 1925 * Info for monitor/mwait idle loop. 1926 * 1927 * See cpuid section of "Intel 64 and IA-32 Architectures Software Developer's 1928 * Manual Volume 2A: Instruction Set Reference, A-M" #25366-022US, November 1929 * 2006. 1930 * See MONITOR/MWAIT section of "AMD64 Architecture Programmer's Manual 1931 * Documentation Updates" #33633, Rev 2.05, December 2006. 1932 */ 1933 #define MWAIT_SUPPORT (0x00000001) /* mwait supported */ 1934 #define MWAIT_EXTENSIONS (0x00000002) /* extenstion supported */ 1935 #define MWAIT_ECX_INT_ENABLE (0x00000004) /* ecx 1 extension supported */ 1936 #define MWAIT_SUPPORTED(cpi) ((cpi)->cpi_std[1].cp_ecx & CPUID_INTC_ECX_MON) 1937 #define MWAIT_INT_ENABLE(cpi) ((cpi)->cpi_std[5].cp_ecx & 0x2) 1938 #define MWAIT_EXTENSION(cpi) ((cpi)->cpi_std[5].cp_ecx & 0x1) 1939 #define MWAIT_SIZE_MIN(cpi) BITX((cpi)->cpi_std[5].cp_eax, 15, 0) 1940 #define MWAIT_SIZE_MAX(cpi) BITX((cpi)->cpi_std[5].cp_ebx, 15, 0) 1941 /* 1942 * Number of sub-cstates for a given c-state. 1943 */ 1944 #define MWAIT_NUM_SUBC_STATES(cpi, c_state) \ 1945 BITX((cpi)->cpi_std[5].cp_edx, c_state + 3, c_state) 1946 1947 /* 1948 * XSAVE leaf 0xD enumeration 1949 */ 1950 #define CPUID_LEAFD_2_YMM_OFFSET 576 1951 #define CPUID_LEAFD_2_YMM_SIZE 256 1952 1953 /* 1954 * Common extended leaf names to cut down on typos. 1955 */ 1956 #define CPUID_LEAF_EXT_0 0x80000000 1957 #define CPUID_LEAF_EXT_8 0x80000008 1958 #define CPUID_LEAF_EXT_1d 0x8000001d 1959 #define CPUID_LEAF_EXT_1e 0x8000001e 1960 1961 /* 1962 * Functions we consune from cpuid_subr.c; don't publish these in a header 1963 * file to try and keep people using the expected cpuid_* interfaces. 1964 */ 1965 extern uint32_t _cpuid_skt(uint_t, uint_t, uint_t, uint_t); 1966 extern const char *_cpuid_sktstr(uint_t, uint_t, uint_t, uint_t); 1967 extern x86_chiprev_t _cpuid_chiprev(uint_t, uint_t, uint_t, uint_t); 1968 extern const char *_cpuid_chiprevstr(uint_t, uint_t, uint_t, uint_t); 1969 extern x86_uarchrev_t _cpuid_uarchrev(uint_t, uint_t, uint_t, uint_t); 1970 extern uint_t _cpuid_vendorstr_to_vendorcode(char *); 1971 1972 /* 1973 * Apply up various platform-dependent restrictions where the 1974 * underlying platform restrictions mean the CPU can be marked 1975 * as less capable than its cpuid instruction would imply. 1976 */ 1977 #if defined(__xpv) 1978 static void 1979 platform_cpuid_mangle(uint_t vendor, uint32_t eax, struct cpuid_regs *cp) 1980 { 1981 switch (eax) { 1982 case 1: { 1983 uint32_t mcamask = DOMAIN_IS_INITDOMAIN(xen_info) ? 1984 0 : CPUID_INTC_EDX_MCA; 1985 cp->cp_edx &= 1986 ~(mcamask | 1987 CPUID_INTC_EDX_PSE | 1988 CPUID_INTC_EDX_VME | CPUID_INTC_EDX_DE | 1989 CPUID_INTC_EDX_SEP | CPUID_INTC_EDX_MTRR | 1990 CPUID_INTC_EDX_PGE | CPUID_INTC_EDX_PAT | 1991 CPUID_AMD_EDX_SYSC | CPUID_INTC_EDX_SEP | 1992 CPUID_INTC_EDX_PSE36 | CPUID_INTC_EDX_HTT); 1993 break; 1994 } 1995 1996 case 0x80000001: 1997 cp->cp_edx &= 1998 ~(CPUID_AMD_EDX_PSE | 1999 CPUID_INTC_EDX_VME | CPUID_INTC_EDX_DE | 2000 CPUID_AMD_EDX_MTRR | CPUID_AMD_EDX_PGE | 2001 CPUID_AMD_EDX_PAT | CPUID_AMD_EDX_PSE36 | 2002 CPUID_AMD_EDX_SYSC | CPUID_INTC_EDX_SEP | 2003 CPUID_AMD_EDX_TSCP); 2004 cp->cp_ecx &= ~CPUID_AMD_ECX_CMP_LGCY; 2005 break; 2006 default: 2007 break; 2008 } 2009 2010 switch (vendor) { 2011 case X86_VENDOR_Intel: 2012 switch (eax) { 2013 case 4: 2014 /* 2015 * Zero out the (ncores-per-chip - 1) field 2016 */ 2017 cp->cp_eax &= 0x03fffffff; 2018 break; 2019 default: 2020 break; 2021 } 2022 break; 2023 case X86_VENDOR_AMD: 2024 case X86_VENDOR_HYGON: 2025 switch (eax) { 2026 2027 case 0x80000001: 2028 cp->cp_ecx &= ~CPUID_AMD_ECX_CR8D; 2029 break; 2030 2031 case CPUID_LEAF_EXT_8: 2032 /* 2033 * Zero out the (ncores-per-chip - 1) field 2034 */ 2035 cp->cp_ecx &= 0xffffff00; 2036 break; 2037 default: 2038 break; 2039 } 2040 break; 2041 default: 2042 break; 2043 } 2044 } 2045 #else 2046 #define platform_cpuid_mangle(vendor, eax, cp) /* nothing */ 2047 #endif 2048 2049 /* 2050 * Some undocumented ways of patching the results of the cpuid 2051 * instruction to permit running Solaris 10 on future cpus that 2052 * we don't currently support. Could be set to non-zero values 2053 * via settings in eeprom. 2054 */ 2055 2056 uint32_t cpuid_feature_ecx_include; 2057 uint32_t cpuid_feature_ecx_exclude; 2058 uint32_t cpuid_feature_edx_include; 2059 uint32_t cpuid_feature_edx_exclude; 2060 2061 /* 2062 * Allocate space for mcpu_cpi in the machcpu structure for all non-boot CPUs. 2063 */ 2064 void 2065 cpuid_alloc_space(cpu_t *cpu) 2066 { 2067 /* 2068 * By convention, cpu0 is the boot cpu, which is set up 2069 * before memory allocation is available. All other cpus get 2070 * their cpuid_info struct allocated here. 2071 */ 2072 ASSERT(cpu->cpu_id != 0); 2073 ASSERT(cpu->cpu_m.mcpu_cpi == NULL); 2074 cpu->cpu_m.mcpu_cpi = 2075 kmem_zalloc(sizeof (*cpu->cpu_m.mcpu_cpi), KM_SLEEP); 2076 } 2077 2078 void 2079 cpuid_free_space(cpu_t *cpu) 2080 { 2081 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2082 int i; 2083 2084 ASSERT(cpi != NULL); 2085 ASSERT(cpi != &cpuid_info0); 2086 2087 /* 2088 * Free up any cache leaf related dynamic storage. The first entry was 2089 * cached from the standard cpuid storage, so we should not free it. 2090 */ 2091 for (i = 1; i < cpi->cpi_cache_leaf_size; i++) 2092 kmem_free(cpi->cpi_cache_leaves[i], sizeof (struct cpuid_regs)); 2093 if (cpi->cpi_cache_leaf_size > 0) 2094 kmem_free(cpi->cpi_cache_leaves, 2095 cpi->cpi_cache_leaf_size * sizeof (struct cpuid_regs *)); 2096 2097 kmem_free(cpi, sizeof (*cpi)); 2098 cpu->cpu_m.mcpu_cpi = NULL; 2099 } 2100 2101 #if !defined(__xpv) 2102 /* 2103 * Determine the type of the underlying platform. This is used to customize 2104 * initialization of various subsystems (e.g. TSC). determine_platform() must 2105 * only ever be called once to prevent two processors from seeing different 2106 * values of platform_type. Must be called before cpuid_pass_ident(), the 2107 * earliest consumer to execute; the identification pass will call 2108 * synth_amd_info() to compute the chiprev, which in turn calls get_hwenv(). 2109 */ 2110 void 2111 determine_platform(void) 2112 { 2113 struct cpuid_regs cp; 2114 uint32_t base; 2115 uint32_t regs[4]; 2116 char *hvstr = (char *)regs; 2117 2118 ASSERT(platform_type == -1); 2119 2120 platform_type = HW_NATIVE; 2121 2122 if (!enable_platform_detection) 2123 return; 2124 2125 /* 2126 * If Hypervisor CPUID bit is set, try to determine hypervisor 2127 * vendor signature, and set platform type accordingly. 2128 * 2129 * References: 2130 * http://lkml.org/lkml/2008/10/1/246 2131 * http://kb.vmware.com/kb/1009458 2132 */ 2133 cp.cp_eax = 0x1; 2134 (void) __cpuid_insn(&cp); 2135 if ((cp.cp_ecx & CPUID_INTC_ECX_HV) != 0) { 2136 cp.cp_eax = 0x40000000; 2137 (void) __cpuid_insn(&cp); 2138 regs[0] = cp.cp_ebx; 2139 regs[1] = cp.cp_ecx; 2140 regs[2] = cp.cp_edx; 2141 regs[3] = 0; 2142 if (strcmp(hvstr, HVSIG_XEN_HVM) == 0) { 2143 platform_type = HW_XEN_HVM; 2144 return; 2145 } 2146 if (strcmp(hvstr, HVSIG_VMWARE) == 0) { 2147 platform_type = HW_VMWARE; 2148 return; 2149 } 2150 if (strcmp(hvstr, HVSIG_KVM) == 0) { 2151 platform_type = HW_KVM; 2152 return; 2153 } 2154 if (strcmp(hvstr, HVSIG_BHYVE) == 0) { 2155 platform_type = HW_BHYVE; 2156 return; 2157 } 2158 if (strcmp(hvstr, HVSIG_MICROSOFT) == 0) 2159 platform_type = HW_MICROSOFT; 2160 } else { 2161 /* 2162 * Check older VMware hardware versions. VMware hypervisor is 2163 * detected by performing an IN operation to VMware hypervisor 2164 * port and checking that value returned in %ebx is VMware 2165 * hypervisor magic value. 2166 * 2167 * References: http://kb.vmware.com/kb/1009458 2168 */ 2169 vmware_port(VMWARE_HVCMD_GETVERSION, regs); 2170 if (regs[1] == VMWARE_HVMAGIC) { 2171 platform_type = HW_VMWARE; 2172 return; 2173 } 2174 } 2175 2176 /* 2177 * Check Xen hypervisor. In a fully virtualized domain, 2178 * Xen's pseudo-cpuid function returns a string representing the 2179 * Xen signature in %ebx, %ecx, and %edx. %eax contains the maximum 2180 * supported cpuid function. We need at least a (base + 2) leaf value 2181 * to do what we want to do. Try different base values, since the 2182 * hypervisor might use a different one depending on whether Hyper-V 2183 * emulation is switched on by default or not. 2184 */ 2185 for (base = 0x40000000; base < 0x40010000; base += 0x100) { 2186 cp.cp_eax = base; 2187 (void) __cpuid_insn(&cp); 2188 regs[0] = cp.cp_ebx; 2189 regs[1] = cp.cp_ecx; 2190 regs[2] = cp.cp_edx; 2191 regs[3] = 0; 2192 if (strcmp(hvstr, HVSIG_XEN_HVM) == 0 && 2193 cp.cp_eax >= (base + 2)) { 2194 platform_type &= ~HW_NATIVE; 2195 platform_type |= HW_XEN_HVM; 2196 return; 2197 } 2198 } 2199 } 2200 2201 int 2202 get_hwenv(void) 2203 { 2204 ASSERT(platform_type != -1); 2205 return (platform_type); 2206 } 2207 2208 int 2209 is_controldom(void) 2210 { 2211 return (0); 2212 } 2213 2214 #else 2215 2216 int 2217 get_hwenv(void) 2218 { 2219 return (HW_XEN_PV); 2220 } 2221 2222 int 2223 is_controldom(void) 2224 { 2225 return (DOMAIN_IS_INITDOMAIN(xen_info)); 2226 } 2227 2228 #endif /* __xpv */ 2229 2230 /* 2231 * Make sure that we have gathered all of the CPUID leaves that we might need to 2232 * determine topology. We assume that the standard leaf 1 has already been done 2233 * and that xmaxeax has already been calculated. 2234 */ 2235 static void 2236 cpuid_gather_amd_topology_leaves(cpu_t *cpu) 2237 { 2238 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2239 2240 if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8) { 2241 struct cpuid_regs *cp; 2242 2243 cp = &cpi->cpi_extd[8]; 2244 cp->cp_eax = CPUID_LEAF_EXT_8; 2245 (void) __cpuid_insn(cp); 2246 platform_cpuid_mangle(cpi->cpi_vendor, CPUID_LEAF_EXT_8, cp); 2247 } 2248 2249 if (is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2250 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e) { 2251 struct cpuid_regs *cp; 2252 2253 cp = &cpi->cpi_extd[0x1e]; 2254 cp->cp_eax = CPUID_LEAF_EXT_1e; 2255 (void) __cpuid_insn(cp); 2256 } 2257 } 2258 2259 /* 2260 * Get the APIC ID for this processor. If Leaf B is present and valid, we prefer 2261 * it to everything else. If not, and we're on an AMD system where 8000001e is 2262 * valid, then we use that. Othewrise, we fall back to the default value for the 2263 * APIC ID in leaf 1. 2264 */ 2265 static uint32_t 2266 cpuid_gather_apicid(struct cpuid_info *cpi) 2267 { 2268 /* 2269 * Leaf B changes based on the arguments to it. Beacuse we don't cache 2270 * it, we need to gather it again. 2271 */ 2272 if (cpi->cpi_maxeax >= 0xB) { 2273 struct cpuid_regs regs; 2274 struct cpuid_regs *cp; 2275 2276 cp = ®s; 2277 cp->cp_eax = 0xB; 2278 cp->cp_edx = cp->cp_ebx = cp->cp_ecx = 0; 2279 (void) __cpuid_insn(cp); 2280 2281 if (cp->cp_ebx != 0) { 2282 return (cp->cp_edx); 2283 } 2284 } 2285 2286 if ((cpi->cpi_vendor == X86_VENDOR_AMD || 2287 cpi->cpi_vendor == X86_VENDOR_HYGON) && 2288 is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2289 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e) { 2290 return (cpi->cpi_extd[0x1e].cp_eax); 2291 } 2292 2293 return (CPI_APIC_ID(cpi)); 2294 } 2295 2296 /* 2297 * For AMD processors, attempt to calculate the number of chips and cores that 2298 * exist. The way that we do this varies based on the generation, because the 2299 * generations themselves have changed dramatically. 2300 * 2301 * If cpuid leaf 0x80000008 exists, that generally tells us the number of cores. 2302 * However, with the advent of family 17h (Zen) it actually tells us the number 2303 * of threads, so we need to look at leaf 0x8000001e if available to determine 2304 * its value. Otherwise, for all prior families, the number of enabled cores is 2305 * the same as threads. 2306 * 2307 * If we do not have leaf 0x80000008, then we assume that this processor does 2308 * not have anything. AMD's older CPUID specification says there's no reason to 2309 * fall back to leaf 1. 2310 * 2311 * In some virtualization cases we will not have leaf 8000001e or it will be 2312 * zero. When that happens we assume the number of threads is one. 2313 */ 2314 static void 2315 cpuid_amd_ncores(struct cpuid_info *cpi, uint_t *ncpus, uint_t *ncores) 2316 { 2317 uint_t nthreads, nthread_per_core; 2318 2319 nthreads = nthread_per_core = 1; 2320 2321 if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8) { 2322 nthreads = BITX(cpi->cpi_extd[8].cp_ecx, 7, 0) + 1; 2323 } else if ((cpi->cpi_std[1].cp_edx & CPUID_INTC_EDX_HTT) != 0) { 2324 nthreads = CPI_CPU_COUNT(cpi); 2325 } 2326 2327 /* 2328 * For us to have threads, and know about it, we have to be at least at 2329 * family 17h and have the cpuid bit that says we have extended 2330 * topology. 2331 */ 2332 if (cpi->cpi_family >= 0x17 && 2333 is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2334 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e) { 2335 nthread_per_core = BITX(cpi->cpi_extd[0x1e].cp_ebx, 15, 8) + 1; 2336 } 2337 2338 *ncpus = nthreads; 2339 *ncores = nthreads / nthread_per_core; 2340 } 2341 2342 /* 2343 * Seed the initial values for the cores and threads for an Intel based 2344 * processor. These values will be overwritten if we detect that the processor 2345 * supports CPUID leaf 0xb. 2346 */ 2347 static void 2348 cpuid_intel_ncores(struct cpuid_info *cpi, uint_t *ncpus, uint_t *ncores) 2349 { 2350 /* 2351 * Only seed the number of physical cores from the first level leaf 4 2352 * information. The number of threads there indicate how many share the 2353 * L1 cache, which may or may not have anything to do with the number of 2354 * logical CPUs per core. 2355 */ 2356 if (cpi->cpi_maxeax >= 4) { 2357 *ncores = BITX(cpi->cpi_std[4].cp_eax, 31, 26) + 1; 2358 } else { 2359 *ncores = 1; 2360 } 2361 2362 if ((cpi->cpi_std[1].cp_edx & CPUID_INTC_EDX_HTT) != 0) { 2363 *ncpus = CPI_CPU_COUNT(cpi); 2364 } else { 2365 *ncpus = *ncores; 2366 } 2367 } 2368 2369 static boolean_t 2370 cpuid_leafB_getids(cpu_t *cpu) 2371 { 2372 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2373 struct cpuid_regs regs; 2374 struct cpuid_regs *cp; 2375 2376 if (cpi->cpi_maxeax < 0xB) 2377 return (B_FALSE); 2378 2379 cp = ®s; 2380 cp->cp_eax = 0xB; 2381 cp->cp_edx = cp->cp_ebx = cp->cp_ecx = 0; 2382 2383 (void) __cpuid_insn(cp); 2384 2385 /* 2386 * Check CPUID.EAX=0BH, ECX=0H:EBX is non-zero, which 2387 * indicates that the extended topology enumeration leaf is 2388 * available. 2389 */ 2390 if (cp->cp_ebx != 0) { 2391 uint32_t x2apic_id = 0; 2392 uint_t coreid_shift = 0; 2393 uint_t ncpu_per_core = 1; 2394 uint_t chipid_shift = 0; 2395 uint_t ncpu_per_chip = 1; 2396 uint_t i; 2397 uint_t level; 2398 2399 for (i = 0; i < CPI_FNB_ECX_MAX; i++) { 2400 cp->cp_eax = 0xB; 2401 cp->cp_ecx = i; 2402 2403 (void) __cpuid_insn(cp); 2404 level = CPI_CPU_LEVEL_TYPE(cp); 2405 2406 if (level == 1) { 2407 x2apic_id = cp->cp_edx; 2408 coreid_shift = BITX(cp->cp_eax, 4, 0); 2409 ncpu_per_core = BITX(cp->cp_ebx, 15, 0); 2410 } else if (level == 2) { 2411 x2apic_id = cp->cp_edx; 2412 chipid_shift = BITX(cp->cp_eax, 4, 0); 2413 ncpu_per_chip = BITX(cp->cp_ebx, 15, 0); 2414 } 2415 } 2416 2417 /* 2418 * cpi_apicid is taken care of in cpuid_gather_apicid. 2419 */ 2420 cpi->cpi_ncpu_per_chip = ncpu_per_chip; 2421 cpi->cpi_ncore_per_chip = ncpu_per_chip / 2422 ncpu_per_core; 2423 cpi->cpi_chipid = x2apic_id >> chipid_shift; 2424 cpi->cpi_clogid = x2apic_id & ((1 << chipid_shift) - 1); 2425 cpi->cpi_coreid = x2apic_id >> coreid_shift; 2426 cpi->cpi_pkgcoreid = cpi->cpi_clogid >> coreid_shift; 2427 cpi->cpi_procnodeid = cpi->cpi_chipid; 2428 cpi->cpi_compunitid = cpi->cpi_coreid; 2429 2430 if (coreid_shift > 0 && chipid_shift > coreid_shift) { 2431 cpi->cpi_nthread_bits = coreid_shift; 2432 cpi->cpi_ncore_bits = chipid_shift - coreid_shift; 2433 } 2434 2435 return (B_TRUE); 2436 } else { 2437 return (B_FALSE); 2438 } 2439 } 2440 2441 static void 2442 cpuid_intel_getids(cpu_t *cpu, void *feature) 2443 { 2444 uint_t i; 2445 uint_t chipid_shift = 0; 2446 uint_t coreid_shift = 0; 2447 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2448 2449 /* 2450 * There are no compute units or processor nodes currently on Intel. 2451 * Always set these to one. 2452 */ 2453 cpi->cpi_procnodes_per_pkg = 1; 2454 cpi->cpi_cores_per_compunit = 1; 2455 2456 /* 2457 * If cpuid Leaf B is present, use that to try and get this information. 2458 * It will be the most accurate for Intel CPUs. 2459 */ 2460 if (cpuid_leafB_getids(cpu)) 2461 return; 2462 2463 /* 2464 * In this case, we have the leaf 1 and leaf 4 values for ncpu_per_chip 2465 * and ncore_per_chip. These represent the largest power of two values 2466 * that we need to cover all of the IDs in the system. Therefore, we use 2467 * those values to seed the number of bits needed to cover information 2468 * in the case when leaf B is not available. These values will probably 2469 * be larger than required, but that's OK. 2470 */ 2471 cpi->cpi_nthread_bits = ddi_fls(cpi->cpi_ncpu_per_chip); 2472 cpi->cpi_ncore_bits = ddi_fls(cpi->cpi_ncore_per_chip); 2473 2474 for (i = 1; i < cpi->cpi_ncpu_per_chip; i <<= 1) 2475 chipid_shift++; 2476 2477 cpi->cpi_chipid = cpi->cpi_apicid >> chipid_shift; 2478 cpi->cpi_clogid = cpi->cpi_apicid & ((1 << chipid_shift) - 1); 2479 2480 if (is_x86_feature(feature, X86FSET_CMP)) { 2481 /* 2482 * Multi-core (and possibly multi-threaded) 2483 * processors. 2484 */ 2485 uint_t ncpu_per_core = 0; 2486 2487 if (cpi->cpi_ncore_per_chip == 1) 2488 ncpu_per_core = cpi->cpi_ncpu_per_chip; 2489 else if (cpi->cpi_ncore_per_chip > 1) 2490 ncpu_per_core = cpi->cpi_ncpu_per_chip / 2491 cpi->cpi_ncore_per_chip; 2492 /* 2493 * 8bit APIC IDs on dual core Pentiums 2494 * look like this: 2495 * 2496 * +-----------------------+------+------+ 2497 * | Physical Package ID | MC | HT | 2498 * +-----------------------+------+------+ 2499 * <------- chipid --------> 2500 * <------- coreid ---------------> 2501 * <--- clogid --> 2502 * <------> 2503 * pkgcoreid 2504 * 2505 * Where the number of bits necessary to 2506 * represent MC and HT fields together equals 2507 * to the minimum number of bits necessary to 2508 * store the value of cpi->cpi_ncpu_per_chip. 2509 * Of those bits, the MC part uses the number 2510 * of bits necessary to store the value of 2511 * cpi->cpi_ncore_per_chip. 2512 */ 2513 for (i = 1; i < ncpu_per_core; i <<= 1) 2514 coreid_shift++; 2515 cpi->cpi_coreid = cpi->cpi_apicid >> coreid_shift; 2516 cpi->cpi_pkgcoreid = cpi->cpi_clogid >> coreid_shift; 2517 } else if (is_x86_feature(feature, X86FSET_HTT)) { 2518 /* 2519 * Single-core multi-threaded processors. 2520 */ 2521 cpi->cpi_coreid = cpi->cpi_chipid; 2522 cpi->cpi_pkgcoreid = 0; 2523 } else { 2524 /* 2525 * Single-core single-thread processors. 2526 */ 2527 cpi->cpi_coreid = cpu->cpu_id; 2528 cpi->cpi_pkgcoreid = 0; 2529 } 2530 cpi->cpi_procnodeid = cpi->cpi_chipid; 2531 cpi->cpi_compunitid = cpi->cpi_coreid; 2532 } 2533 2534 /* 2535 * Historically, AMD has had CMP chips with only a single thread per core. 2536 * However, starting in family 17h (Zen), this has changed and they now have 2537 * multiple threads. Our internal core id needs to be a unique value. 2538 * 2539 * To determine the core id of an AMD system, if we're from a family before 17h, 2540 * then we just use the cpu id, as that gives us a good value that will be 2541 * unique for each core. If instead, we're on family 17h or later, then we need 2542 * to do something more complicated. CPUID leaf 0x8000001e can tell us 2543 * how many threads are in the system. Based on that, we'll shift the APIC ID. 2544 * We can't use the normal core id in that leaf as it's only unique within the 2545 * socket, which is perfect for cpi_pkgcoreid, but not us. 2546 */ 2547 static id_t 2548 cpuid_amd_get_coreid(cpu_t *cpu) 2549 { 2550 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2551 2552 if (cpi->cpi_family >= 0x17 && 2553 is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2554 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e) { 2555 uint_t nthreads = BITX(cpi->cpi_extd[0x1e].cp_ebx, 15, 8) + 1; 2556 if (nthreads > 1) { 2557 VERIFY3U(nthreads, ==, 2); 2558 return (cpi->cpi_apicid >> 1); 2559 } 2560 } 2561 2562 return (cpu->cpu_id); 2563 } 2564 2565 /* 2566 * IDs on AMD is a more challenging task. This is notable because of the 2567 * following two facts: 2568 * 2569 * 1. Before family 0x17 (Zen), there was no support for SMT and there was 2570 * also no way to get an actual unique core id from the system. As such, we 2571 * synthesize this case by using cpu->cpu_id. This scheme does not, 2572 * however, guarantee that sibling cores of a chip will have sequential 2573 * coreids starting at a multiple of the number of cores per chip - that is 2574 * usually the case, but if the APIC IDs have been set up in a different 2575 * order then we need to perform a few more gymnastics for the pkgcoreid. 2576 * 2577 * 2. In families 0x15 and 16x (Bulldozer and co.) the cores came in groups 2578 * called compute units. These compute units share the L1I cache, L2 cache, 2579 * and the FPU. To deal with this, a new topology leaf was added in 2580 * 0x8000001e. However, parts of this leaf have different meanings 2581 * once we get to family 0x17. 2582 */ 2583 2584 static void 2585 cpuid_amd_getids(cpu_t *cpu, uchar_t *features) 2586 { 2587 int i, first_half, coreidsz; 2588 uint32_t nb_caps_reg; 2589 uint_t node2_1; 2590 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2591 struct cpuid_regs *cp; 2592 2593 /* 2594 * Calculate the core id (this comes from hardware in family 0x17 if it 2595 * hasn't been stripped by virtualization). We always set the compute 2596 * unit id to the same value. Also, initialize the default number of 2597 * cores per compute unit and nodes per package. This will be 2598 * overwritten when we know information about a particular family. 2599 */ 2600 cpi->cpi_coreid = cpuid_amd_get_coreid(cpu); 2601 cpi->cpi_compunitid = cpi->cpi_coreid; 2602 cpi->cpi_cores_per_compunit = 1; 2603 cpi->cpi_procnodes_per_pkg = 1; 2604 2605 /* 2606 * To construct the logical ID, we need to determine how many APIC IDs 2607 * are dedicated to the cores and threads. This is provided for us in 2608 * 0x80000008. However, if it's not present (say due to virtualization), 2609 * then we assume it's one. This should be present on all 64-bit AMD 2610 * processors. It was added in family 0xf (Hammer). 2611 */ 2612 if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8) { 2613 coreidsz = BITX((cpi)->cpi_extd[8].cp_ecx, 15, 12); 2614 2615 /* 2616 * In AMD parlance chip is really a node while illumos 2617 * uses chip as equivalent to socket/package. 2618 */ 2619 if (coreidsz == 0) { 2620 /* Use legacy method */ 2621 for (i = 1; i < cpi->cpi_ncore_per_chip; i <<= 1) 2622 coreidsz++; 2623 if (coreidsz == 0) 2624 coreidsz = 1; 2625 } 2626 } else { 2627 /* Assume single-core part */ 2628 coreidsz = 1; 2629 } 2630 cpi->cpi_clogid = cpi->cpi_apicid & ((1 << coreidsz) - 1); 2631 2632 /* 2633 * The package core ID varies depending on the family. While it may be 2634 * tempting to use the CPUID_LEAF_EXT_1e %ebx core id, unfortunately, 2635 * this value is the core id in the given node. For non-virtualized 2636 * family 17h, we need to take the logical core id and shift off the 2637 * threads like we do when getting the core id. Otherwise, we can use 2638 * the clogid as is. When family 17h is virtualized, the clogid should 2639 * be sufficient as if we don't have valid data in the leaf, then we 2640 * won't think we have SMT, in which case the cpi_clogid should be 2641 * sufficient. 2642 */ 2643 if (cpi->cpi_family >= 0x17 && 2644 is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2645 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e && 2646 cpi->cpi_extd[0x1e].cp_ebx != 0) { 2647 uint_t nthreads = BITX(cpi->cpi_extd[0x1e].cp_ebx, 15, 8) + 1; 2648 if (nthreads > 1) { 2649 VERIFY3U(nthreads, ==, 2); 2650 cpi->cpi_pkgcoreid = cpi->cpi_clogid >> 1; 2651 } else { 2652 cpi->cpi_pkgcoreid = cpi->cpi_clogid; 2653 } 2654 } else { 2655 cpi->cpi_pkgcoreid = cpi->cpi_clogid; 2656 } 2657 2658 /* 2659 * Obtain the node ID and compute unit IDs. If we're on family 0x15 2660 * (bulldozer) or newer, then we can derive all of this from leaf 2661 * CPUID_LEAF_EXT_1e. Otherwise, the method varies by family. 2662 */ 2663 if (is_x86_feature(x86_featureset, X86FSET_TOPOEXT) && 2664 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1e) { 2665 cp = &cpi->cpi_extd[0x1e]; 2666 2667 cpi->cpi_procnodes_per_pkg = BITX(cp->cp_ecx, 10, 8) + 1; 2668 cpi->cpi_procnodeid = BITX(cp->cp_ecx, 7, 0); 2669 2670 /* 2671 * For Bulldozer-era CPUs, recalculate the compute unit 2672 * information. 2673 */ 2674 if (cpi->cpi_family >= 0x15 && cpi->cpi_family < 0x17) { 2675 cpi->cpi_cores_per_compunit = 2676 BITX(cp->cp_ebx, 15, 8) + 1; 2677 cpi->cpi_compunitid = BITX(cp->cp_ebx, 7, 0) + 2678 (cpi->cpi_ncore_per_chip / 2679 cpi->cpi_cores_per_compunit) * 2680 (cpi->cpi_procnodeid / 2681 cpi->cpi_procnodes_per_pkg); 2682 } 2683 } else if (cpi->cpi_family == 0xf || cpi->cpi_family >= 0x11) { 2684 cpi->cpi_procnodeid = (cpi->cpi_apicid >> coreidsz) & 7; 2685 } else if (cpi->cpi_family == 0x10) { 2686 /* 2687 * See if we are a multi-node processor. 2688 * All processors in the system have the same number of nodes 2689 */ 2690 nb_caps_reg = pci_getl_func(0, 24, 3, 0xe8); 2691 if ((cpi->cpi_model < 8) || BITX(nb_caps_reg, 29, 29) == 0) { 2692 /* Single-node */ 2693 cpi->cpi_procnodeid = BITX(cpi->cpi_apicid, 5, 2694 coreidsz); 2695 } else { 2696 2697 /* 2698 * Multi-node revision D (2 nodes per package 2699 * are supported) 2700 */ 2701 cpi->cpi_procnodes_per_pkg = 2; 2702 2703 first_half = (cpi->cpi_pkgcoreid <= 2704 (cpi->cpi_ncore_per_chip/2 - 1)); 2705 2706 if (cpi->cpi_apicid == cpi->cpi_pkgcoreid) { 2707 /* We are BSP */ 2708 cpi->cpi_procnodeid = (first_half ? 0 : 1); 2709 } else { 2710 2711 /* We are AP */ 2712 /* NodeId[2:1] bits to use for reading F3xe8 */ 2713 node2_1 = BITX(cpi->cpi_apicid, 5, 4) << 1; 2714 2715 nb_caps_reg = 2716 pci_getl_func(0, 24 + node2_1, 3, 0xe8); 2717 2718 /* 2719 * Check IntNodeNum bit (31:30, but bit 31 is 2720 * always 0 on dual-node processors) 2721 */ 2722 if (BITX(nb_caps_reg, 30, 30) == 0) 2723 cpi->cpi_procnodeid = node2_1 + 2724 !first_half; 2725 else 2726 cpi->cpi_procnodeid = node2_1 + 2727 first_half; 2728 } 2729 } 2730 } else { 2731 cpi->cpi_procnodeid = 0; 2732 } 2733 2734 cpi->cpi_chipid = 2735 cpi->cpi_procnodeid / cpi->cpi_procnodes_per_pkg; 2736 2737 cpi->cpi_ncore_bits = coreidsz; 2738 cpi->cpi_nthread_bits = ddi_fls(cpi->cpi_ncpu_per_chip / 2739 cpi->cpi_ncore_per_chip); 2740 } 2741 2742 static void 2743 spec_uarch_flush_noop(void) 2744 { 2745 } 2746 2747 /* 2748 * When microcode is present that mitigates MDS, this wrmsr will also flush the 2749 * MDS-related micro-architectural state that would normally happen by calling 2750 * x86_md_clear(). 2751 */ 2752 static void 2753 spec_uarch_flush_msr(void) 2754 { 2755 wrmsr(MSR_IA32_FLUSH_CMD, IA32_FLUSH_CMD_L1D); 2756 } 2757 2758 /* 2759 * This function points to a function that will flush certain 2760 * micro-architectural state on the processor. This flush is used to mitigate 2761 * two different classes of Intel CPU vulnerabilities: L1TF and MDS. This 2762 * function can point to one of three functions: 2763 * 2764 * - A noop which is done because we either are vulnerable, but do not have 2765 * microcode available to help deal with a fix, or because we aren't 2766 * vulnerable. 2767 * 2768 * - spec_uarch_flush_msr which will issue an L1D flush and if microcode to 2769 * mitigate MDS is present, also perform the equivalent of the MDS flush; 2770 * however, it only flushes the MDS related micro-architectural state on the 2771 * current hyperthread, it does not do anything for the twin. 2772 * 2773 * - x86_md_clear which will flush the MDS related state. This is done when we 2774 * have a processor that is vulnerable to MDS, but is not vulnerable to L1TF 2775 * (RDCL_NO is set). 2776 */ 2777 void (*spec_uarch_flush)(void) = spec_uarch_flush_noop; 2778 2779 static void 2780 cpuid_update_md_clear(cpu_t *cpu, uchar_t *featureset) 2781 { 2782 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2783 2784 /* 2785 * While RDCL_NO indicates that one of the MDS vulnerabilities (MSBDS) 2786 * has been fixed in hardware, it doesn't cover everything related to 2787 * MDS. Therefore we can only rely on MDS_NO to determine that we don't 2788 * need to mitigate this. 2789 */ 2790 if (cpi->cpi_vendor != X86_VENDOR_Intel || 2791 is_x86_feature(featureset, X86FSET_MDS_NO)) { 2792 return; 2793 } 2794 2795 if (is_x86_feature(featureset, X86FSET_MD_CLEAR)) { 2796 const uint8_t nop = NOP_INSTR; 2797 uint8_t *md = (uint8_t *)x86_md_clear; 2798 2799 *md = nop; 2800 } 2801 2802 membar_producer(); 2803 } 2804 2805 static void 2806 cpuid_update_l1d_flush(cpu_t *cpu, uchar_t *featureset) 2807 { 2808 boolean_t need_l1d, need_mds; 2809 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2810 2811 /* 2812 * If we're not on Intel or we've mitigated both RDCL and MDS in 2813 * hardware, then there's nothing left for us to do for enabling the 2814 * flush. We can also go ahead and say that SMT exclusion is 2815 * unnecessary. 2816 */ 2817 if (cpi->cpi_vendor != X86_VENDOR_Intel || 2818 (is_x86_feature(featureset, X86FSET_RDCL_NO) && 2819 is_x86_feature(featureset, X86FSET_MDS_NO))) { 2820 extern int smt_exclusion; 2821 smt_exclusion = 0; 2822 spec_uarch_flush = spec_uarch_flush_noop; 2823 membar_producer(); 2824 return; 2825 } 2826 2827 /* 2828 * The locations where we need to perform an L1D flush are required both 2829 * for mitigating L1TF and MDS. When verw support is present in 2830 * microcode, then the L1D flush will take care of doing that as well. 2831 * However, if we have a system where RDCL_NO is present, but we don't 2832 * have MDS_NO, then we need to do a verw (x86_md_clear) and not a full 2833 * L1D flush. 2834 */ 2835 if (!is_x86_feature(featureset, X86FSET_RDCL_NO) && 2836 is_x86_feature(featureset, X86FSET_FLUSH_CMD) && 2837 !is_x86_feature(featureset, X86FSET_L1D_VM_NO)) { 2838 need_l1d = B_TRUE; 2839 } else { 2840 need_l1d = B_FALSE; 2841 } 2842 2843 if (!is_x86_feature(featureset, X86FSET_MDS_NO) && 2844 is_x86_feature(featureset, X86FSET_MD_CLEAR)) { 2845 need_mds = B_TRUE; 2846 } else { 2847 need_mds = B_FALSE; 2848 } 2849 2850 if (need_l1d) { 2851 spec_uarch_flush = spec_uarch_flush_msr; 2852 } else if (need_mds) { 2853 spec_uarch_flush = x86_md_clear; 2854 } else { 2855 /* 2856 * We have no hardware mitigations available to us. 2857 */ 2858 spec_uarch_flush = spec_uarch_flush_noop; 2859 } 2860 membar_producer(); 2861 } 2862 2863 /* 2864 * We default to enabling RSB mitigations. 2865 * 2866 * NOTE: We used to skip RSB mitigations with eIBRS, but developments around 2867 * post-barrier RSB guessing suggests we should enable RSB mitigations always 2868 * unless specifically instructed not to. 2869 */ 2870 static void 2871 cpuid_patch_rsb(x86_spectrev2_mitigation_t mit) 2872 { 2873 const uint8_t ret = RET_INSTR; 2874 uint8_t *stuff = (uint8_t *)x86_rsb_stuff; 2875 2876 switch (mit) { 2877 case X86_SPECTREV2_DISABLED: 2878 *stuff = ret; 2879 break; 2880 default: 2881 break; 2882 } 2883 } 2884 2885 static void 2886 cpuid_patch_retpolines(x86_spectrev2_mitigation_t mit) 2887 { 2888 const char *thunks[] = { "_rax", "_rbx", "_rcx", "_rdx", "_rdi", 2889 "_rsi", "_rbp", "_r8", "_r9", "_r10", "_r11", "_r12", "_r13", 2890 "_r14", "_r15" }; 2891 const uint_t nthunks = ARRAY_SIZE(thunks); 2892 const char *type; 2893 uint_t i; 2894 2895 if (mit == x86_spectrev2_mitigation) 2896 return; 2897 2898 switch (mit) { 2899 case X86_SPECTREV2_RETPOLINE: 2900 type = "gen"; 2901 break; 2902 case X86_SPECTREV2_ENHANCED_IBRS: 2903 case X86_SPECTREV2_DISABLED: 2904 type = "jmp"; 2905 break; 2906 default: 2907 panic("asked to updated retpoline state with unknown state!"); 2908 } 2909 2910 for (i = 0; i < nthunks; i++) { 2911 uintptr_t source, dest; 2912 int ssize, dsize; 2913 char sourcebuf[64], destbuf[64]; 2914 2915 (void) snprintf(destbuf, sizeof (destbuf), 2916 "__x86_indirect_thunk%s", thunks[i]); 2917 (void) snprintf(sourcebuf, sizeof (sourcebuf), 2918 "__x86_indirect_thunk_%s%s", type, thunks[i]); 2919 2920 source = kobj_getelfsym(sourcebuf, NULL, &ssize); 2921 dest = kobj_getelfsym(destbuf, NULL, &dsize); 2922 VERIFY3U(source, !=, 0); 2923 VERIFY3U(dest, !=, 0); 2924 VERIFY3S(dsize, >=, ssize); 2925 bcopy((void *)source, (void *)dest, ssize); 2926 } 2927 } 2928 2929 static void 2930 cpuid_enable_enhanced_ibrs(void) 2931 { 2932 uint64_t val; 2933 2934 val = rdmsr(MSR_IA32_SPEC_CTRL); 2935 val |= IA32_SPEC_CTRL_IBRS; 2936 wrmsr(MSR_IA32_SPEC_CTRL, val); 2937 } 2938 2939 /* 2940 * Determine how we should mitigate TAA or if we need to. Regardless of TAA, if 2941 * we can disable TSX, we do so. 2942 * 2943 * This determination is done only on the boot CPU, potentially after loading 2944 * updated microcode. 2945 */ 2946 static void 2947 cpuid_update_tsx(cpu_t *cpu, uchar_t *featureset) 2948 { 2949 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 2950 2951 VERIFY(cpu->cpu_id == 0); 2952 2953 if (cpi->cpi_vendor != X86_VENDOR_Intel) { 2954 x86_taa_mitigation = X86_TAA_HW_MITIGATED; 2955 return; 2956 } 2957 2958 if (x86_disable_taa) { 2959 x86_taa_mitigation = X86_TAA_DISABLED; 2960 return; 2961 } 2962 2963 /* 2964 * If we do not have the ability to disable TSX, then our only 2965 * mitigation options are in hardware (TAA_NO), or by using our existing 2966 * MDS mitigation as described above. The latter relies upon us having 2967 * configured MDS mitigations correctly! This includes disabling SMT if 2968 * we want to cross-CPU-thread protection. 2969 */ 2970 if (!is_x86_feature(featureset, X86FSET_TSX_CTRL)) { 2971 /* 2972 * It's not clear whether any parts will enumerate TAA_NO 2973 * *without* TSX_CTRL, but let's mark it as such if we see this. 2974 */ 2975 if (is_x86_feature(featureset, X86FSET_TAA_NO)) { 2976 x86_taa_mitigation = X86_TAA_HW_MITIGATED; 2977 return; 2978 } 2979 2980 if (is_x86_feature(featureset, X86FSET_MD_CLEAR) && 2981 !is_x86_feature(featureset, X86FSET_MDS_NO)) { 2982 x86_taa_mitigation = X86_TAA_MD_CLEAR; 2983 } else { 2984 x86_taa_mitigation = X86_TAA_NOTHING; 2985 } 2986 return; 2987 } 2988 2989 /* 2990 * We have TSX_CTRL, but we can only fully disable TSX if we're early 2991 * enough in boot. 2992 * 2993 * Otherwise, we'll fall back to causing transactions to abort as our 2994 * mitigation. TSX-using code will always take the fallback path. 2995 */ 2996 if (cpi->cpi_pass < 4) { 2997 x86_taa_mitigation = X86_TAA_TSX_DISABLE; 2998 } else { 2999 x86_taa_mitigation = X86_TAA_TSX_FORCE_ABORT; 3000 } 3001 } 3002 3003 /* 3004 * As mentioned, we should only touch the MSR when we've got a suitable 3005 * microcode loaded on this CPU. 3006 */ 3007 static void 3008 cpuid_apply_tsx(x86_taa_mitigation_t taa, uchar_t *featureset) 3009 { 3010 uint64_t val; 3011 3012 switch (taa) { 3013 case X86_TAA_TSX_DISABLE: 3014 if (!is_x86_feature(featureset, X86FSET_TSX_CTRL)) 3015 return; 3016 val = rdmsr(MSR_IA32_TSX_CTRL); 3017 val |= IA32_TSX_CTRL_CPUID_CLEAR | IA32_TSX_CTRL_RTM_DISABLE; 3018 wrmsr(MSR_IA32_TSX_CTRL, val); 3019 break; 3020 case X86_TAA_TSX_FORCE_ABORT: 3021 if (!is_x86_feature(featureset, X86FSET_TSX_CTRL)) 3022 return; 3023 val = rdmsr(MSR_IA32_TSX_CTRL); 3024 val |= IA32_TSX_CTRL_RTM_DISABLE; 3025 wrmsr(MSR_IA32_TSX_CTRL, val); 3026 break; 3027 case X86_TAA_HW_MITIGATED: 3028 case X86_TAA_MD_CLEAR: 3029 case X86_TAA_DISABLED: 3030 case X86_TAA_NOTHING: 3031 break; 3032 } 3033 } 3034 3035 static void 3036 cpuid_scan_security(cpu_t *cpu, uchar_t *featureset) 3037 { 3038 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 3039 x86_spectrev2_mitigation_t v2mit; 3040 3041 if ((cpi->cpi_vendor == X86_VENDOR_AMD || 3042 cpi->cpi_vendor == X86_VENDOR_HYGON) && 3043 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8) { 3044 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_IBPB) 3045 add_x86_feature(featureset, X86FSET_IBPB); 3046 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_IBRS) 3047 add_x86_feature(featureset, X86FSET_IBRS); 3048 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_STIBP) 3049 add_x86_feature(featureset, X86FSET_STIBP); 3050 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_STIBP_ALL) 3051 add_x86_feature(featureset, X86FSET_STIBP_ALL); 3052 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_SSBD) 3053 add_x86_feature(featureset, X86FSET_SSBD); 3054 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_VIRT_SSBD) 3055 add_x86_feature(featureset, X86FSET_SSBD_VIRT); 3056 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_SSB_NO) 3057 add_x86_feature(featureset, X86FSET_SSB_NO); 3058 /* 3059 * Don't enable enhanced IBRS unless we're told that we should 3060 * prefer it and it has the same semantics as Intel. This is 3061 * split into two bits rather than a single one. 3062 */ 3063 if ((cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_PREFER_IBRS) && 3064 (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_IBRS_ALL)) { 3065 add_x86_feature(featureset, X86FSET_IBRS_ALL); 3066 } 3067 3068 } else if (cpi->cpi_vendor == X86_VENDOR_Intel && 3069 cpi->cpi_maxeax >= 7) { 3070 struct cpuid_regs *ecp; 3071 ecp = &cpi->cpi_std[7]; 3072 3073 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_MD_CLEAR) { 3074 add_x86_feature(featureset, X86FSET_MD_CLEAR); 3075 } 3076 3077 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_SPEC_CTRL) { 3078 add_x86_feature(featureset, X86FSET_IBRS); 3079 add_x86_feature(featureset, X86FSET_IBPB); 3080 } 3081 3082 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_STIBP) { 3083 add_x86_feature(featureset, X86FSET_STIBP); 3084 } 3085 3086 /* 3087 * Don't read the arch caps MSR on xpv where we lack the 3088 * on_trap(). 3089 */ 3090 #ifndef __xpv 3091 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_ARCH_CAPS) { 3092 on_trap_data_t otd; 3093 3094 /* 3095 * Be paranoid and assume we'll get a #GP. 3096 */ 3097 if (!on_trap(&otd, OT_DATA_ACCESS)) { 3098 uint64_t reg; 3099 3100 reg = rdmsr(MSR_IA32_ARCH_CAPABILITIES); 3101 if (reg & IA32_ARCH_CAP_RDCL_NO) { 3102 add_x86_feature(featureset, 3103 X86FSET_RDCL_NO); 3104 } 3105 if (reg & IA32_ARCH_CAP_IBRS_ALL) { 3106 add_x86_feature(featureset, 3107 X86FSET_IBRS_ALL); 3108 } 3109 if (reg & IA32_ARCH_CAP_RSBA) { 3110 add_x86_feature(featureset, 3111 X86FSET_RSBA); 3112 } 3113 if (reg & IA32_ARCH_CAP_SKIP_L1DFL_VMENTRY) { 3114 add_x86_feature(featureset, 3115 X86FSET_L1D_VM_NO); 3116 } 3117 if (reg & IA32_ARCH_CAP_SSB_NO) { 3118 add_x86_feature(featureset, 3119 X86FSET_SSB_NO); 3120 } 3121 if (reg & IA32_ARCH_CAP_MDS_NO) { 3122 add_x86_feature(featureset, 3123 X86FSET_MDS_NO); 3124 } 3125 if (reg & IA32_ARCH_CAP_TSX_CTRL) { 3126 add_x86_feature(featureset, 3127 X86FSET_TSX_CTRL); 3128 } 3129 if (reg & IA32_ARCH_CAP_TAA_NO) { 3130 add_x86_feature(featureset, 3131 X86FSET_TAA_NO); 3132 } 3133 } 3134 no_trap(); 3135 } 3136 #endif /* !__xpv */ 3137 3138 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_SSBD) 3139 add_x86_feature(featureset, X86FSET_SSBD); 3140 3141 if (ecp->cp_edx & CPUID_INTC_EDX_7_0_FLUSH_CMD) 3142 add_x86_feature(featureset, X86FSET_FLUSH_CMD); 3143 } 3144 3145 /* 3146 * Take care of certain mitigations on the non-boot CPU. The boot CPU 3147 * will have already run this function and determined what we need to 3148 * do. This gives us a hook for per-HW thread mitigations such as 3149 * enhanced IBRS, or disabling TSX. 3150 */ 3151 if (cpu->cpu_id != 0) { 3152 if (x86_spectrev2_mitigation == X86_SPECTREV2_ENHANCED_IBRS) { 3153 cpuid_enable_enhanced_ibrs(); 3154 } 3155 3156 cpuid_apply_tsx(x86_taa_mitigation, featureset); 3157 return; 3158 } 3159 3160 /* 3161 * Go through and initialize various security mechanisms that we should 3162 * only do on a single CPU. This includes Spectre V2, L1TF, MDS, and 3163 * TAA. 3164 */ 3165 3166 /* 3167 * By default we've come in with retpolines enabled. Check whether we 3168 * should disable them or enable enhanced IBRS. RSB stuffing is enabled 3169 * by default, but disabled if we are using enhanced IBRS. Note, we do 3170 * not allow the use of AMD optimized retpolines as it was disclosed by 3171 * AMD in March 2022 that they were still vulnerable. Prior to that 3172 * point, we used them. 3173 */ 3174 if (x86_disable_spectrev2 != 0) { 3175 v2mit = X86_SPECTREV2_DISABLED; 3176 } else if (is_x86_feature(featureset, X86FSET_IBRS_ALL)) { 3177 cpuid_enable_enhanced_ibrs(); 3178 v2mit = X86_SPECTREV2_ENHANCED_IBRS; 3179 } else { 3180 v2mit = X86_SPECTREV2_RETPOLINE; 3181 } 3182 3183 cpuid_patch_retpolines(v2mit); 3184 cpuid_patch_rsb(v2mit); 3185 x86_spectrev2_mitigation = v2mit; 3186 membar_producer(); 3187 3188 /* 3189 * We need to determine what changes are required for mitigating L1TF 3190 * and MDS. If the CPU suffers from either of them, then SMT exclusion 3191 * is required. 3192 * 3193 * If any of these are present, then we need to flush u-arch state at 3194 * various points. For MDS, we need to do so whenever we change to a 3195 * lesser privilege level or we are halting the CPU. For L1TF we need to 3196 * flush the L1D cache at VM entry. When we have microcode that handles 3197 * MDS, the L1D flush also clears the other u-arch state that the 3198 * md_clear does. 3199 */ 3200 3201 /* 3202 * Update whether or not we need to be taking explicit action against 3203 * MDS. 3204 */ 3205 cpuid_update_md_clear(cpu, featureset); 3206 3207 /* 3208 * Determine whether SMT exclusion is required and whether or not we 3209 * need to perform an l1d flush. 3210 */ 3211 cpuid_update_l1d_flush(cpu, featureset); 3212 3213 /* 3214 * Determine what our mitigation strategy should be for TAA and then 3215 * also apply TAA mitigations. 3216 */ 3217 cpuid_update_tsx(cpu, featureset); 3218 cpuid_apply_tsx(x86_taa_mitigation, featureset); 3219 } 3220 3221 /* 3222 * Setup XFeature_Enabled_Mask register. Required by xsave feature. 3223 */ 3224 void 3225 setup_xfem(void) 3226 { 3227 uint64_t flags = XFEATURE_LEGACY_FP; 3228 3229 ASSERT(is_x86_feature(x86_featureset, X86FSET_XSAVE)); 3230 3231 if (is_x86_feature(x86_featureset, X86FSET_SSE)) 3232 flags |= XFEATURE_SSE; 3233 3234 if (is_x86_feature(x86_featureset, X86FSET_AVX)) 3235 flags |= XFEATURE_AVX; 3236 3237 if (is_x86_feature(x86_featureset, X86FSET_AVX512F)) 3238 flags |= XFEATURE_AVX512; 3239 3240 set_xcr(XFEATURE_ENABLED_MASK, flags); 3241 3242 xsave_bv_all = flags; 3243 } 3244 3245 static void 3246 cpuid_basic_topology(cpu_t *cpu, uchar_t *featureset) 3247 { 3248 struct cpuid_info *cpi; 3249 3250 cpi = cpu->cpu_m.mcpu_cpi; 3251 3252 if (cpi->cpi_vendor == X86_VENDOR_AMD || 3253 cpi->cpi_vendor == X86_VENDOR_HYGON) { 3254 cpuid_gather_amd_topology_leaves(cpu); 3255 } 3256 3257 cpi->cpi_apicid = cpuid_gather_apicid(cpi); 3258 3259 /* 3260 * Before we can calculate the IDs that we should assign to this 3261 * processor, we need to understand how many cores and threads it has. 3262 */ 3263 switch (cpi->cpi_vendor) { 3264 case X86_VENDOR_Intel: 3265 cpuid_intel_ncores(cpi, &cpi->cpi_ncpu_per_chip, 3266 &cpi->cpi_ncore_per_chip); 3267 break; 3268 case X86_VENDOR_AMD: 3269 case X86_VENDOR_HYGON: 3270 cpuid_amd_ncores(cpi, &cpi->cpi_ncpu_per_chip, 3271 &cpi->cpi_ncore_per_chip); 3272 break; 3273 default: 3274 /* 3275 * If we have some other x86 compatible chip, it's not clear how 3276 * they would behave. The most common case is virtualization 3277 * today, though there are also 64-bit VIA chips. Assume that 3278 * all we can get is the basic Leaf 1 HTT information. 3279 */ 3280 if ((cpi->cpi_std[1].cp_edx & CPUID_INTC_EDX_HTT) != 0) { 3281 cpi->cpi_ncore_per_chip = 1; 3282 cpi->cpi_ncpu_per_chip = CPI_CPU_COUNT(cpi); 3283 } 3284 break; 3285 } 3286 3287 /* 3288 * Based on the calculated number of threads and cores, potentially 3289 * assign the HTT and CMT features. 3290 */ 3291 if (cpi->cpi_ncore_per_chip > 1) { 3292 add_x86_feature(featureset, X86FSET_CMP); 3293 } 3294 3295 if (cpi->cpi_ncpu_per_chip > 1 && 3296 cpi->cpi_ncpu_per_chip != cpi->cpi_ncore_per_chip) { 3297 add_x86_feature(featureset, X86FSET_HTT); 3298 } 3299 3300 /* 3301 * Now that has been set up, we need to go through and calculate all of 3302 * the rest of the parameters that exist. If we think the CPU doesn't 3303 * have either SMT (HTT) or CMP, then we basically go through and fake 3304 * up information in some way. The most likely case for this is 3305 * virtualization where we have a lot of partial topology information. 3306 */ 3307 if (!is_x86_feature(featureset, X86FSET_HTT) && 3308 !is_x86_feature(featureset, X86FSET_CMP)) { 3309 /* 3310 * This is a single core, single-threaded processor. 3311 */ 3312 cpi->cpi_procnodes_per_pkg = 1; 3313 cpi->cpi_cores_per_compunit = 1; 3314 cpi->cpi_compunitid = 0; 3315 cpi->cpi_chipid = -1; 3316 cpi->cpi_clogid = 0; 3317 cpi->cpi_coreid = cpu->cpu_id; 3318 cpi->cpi_pkgcoreid = 0; 3319 if (cpi->cpi_vendor == X86_VENDOR_AMD || 3320 cpi->cpi_vendor == X86_VENDOR_HYGON) { 3321 cpi->cpi_procnodeid = BITX(cpi->cpi_apicid, 3, 0); 3322 } else { 3323 cpi->cpi_procnodeid = cpi->cpi_chipid; 3324 } 3325 } else { 3326 switch (cpi->cpi_vendor) { 3327 case X86_VENDOR_Intel: 3328 cpuid_intel_getids(cpu, featureset); 3329 break; 3330 case X86_VENDOR_AMD: 3331 case X86_VENDOR_HYGON: 3332 cpuid_amd_getids(cpu, featureset); 3333 break; 3334 default: 3335 /* 3336 * In this case, it's hard to say what we should do. 3337 * We're going to model them to the OS as single core 3338 * threads. We don't have a good identifier for them, so 3339 * we're just going to use the cpu id all on a single 3340 * chip. 3341 * 3342 * This case has historically been different from the 3343 * case above where we don't have HTT or CMP. While they 3344 * could be combined, we've opted to keep it separate to 3345 * minimize the risk of topology changes in weird cases. 3346 */ 3347 cpi->cpi_procnodes_per_pkg = 1; 3348 cpi->cpi_cores_per_compunit = 1; 3349 cpi->cpi_chipid = 0; 3350 cpi->cpi_coreid = cpu->cpu_id; 3351 cpi->cpi_clogid = cpu->cpu_id; 3352 cpi->cpi_pkgcoreid = cpu->cpu_id; 3353 cpi->cpi_procnodeid = cpi->cpi_chipid; 3354 cpi->cpi_compunitid = cpi->cpi_coreid; 3355 break; 3356 } 3357 } 3358 } 3359 3360 /* 3361 * Gather relevant CPU features from leaf 6 which covers thermal information. We 3362 * always gather leaf 6 if it's supported; however, we only look for features on 3363 * Intel systems as AMD does not currently define any of the features we look 3364 * for below. 3365 */ 3366 static void 3367 cpuid_basic_thermal(cpu_t *cpu, uchar_t *featureset) 3368 { 3369 struct cpuid_regs *cp; 3370 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 3371 3372 if (cpi->cpi_maxeax < 6) { 3373 return; 3374 } 3375 3376 cp = &cpi->cpi_std[6]; 3377 cp->cp_eax = 6; 3378 cp->cp_ebx = cp->cp_ecx = cp->cp_edx = 0; 3379 (void) __cpuid_insn(cp); 3380 platform_cpuid_mangle(cpi->cpi_vendor, 6, cp); 3381 3382 if (cpi->cpi_vendor != X86_VENDOR_Intel) { 3383 return; 3384 } 3385 3386 if ((cp->cp_eax & CPUID_INTC_EAX_DTS) != 0) { 3387 add_x86_feature(featureset, X86FSET_CORE_THERMAL); 3388 } 3389 3390 if ((cp->cp_eax & CPUID_INTC_EAX_PTM) != 0) { 3391 add_x86_feature(featureset, X86FSET_PKG_THERMAL); 3392 } 3393 } 3394 3395 /* 3396 * This is used when we discover that we have AVX support in cpuid. This 3397 * proceeds to scan for the rest of the AVX derived features. 3398 */ 3399 static void 3400 cpuid_basic_avx(cpu_t *cpu, uchar_t *featureset) 3401 { 3402 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 3403 3404 /* 3405 * If we don't have AVX, don't bother with most of this. 3406 */ 3407 if ((cpi->cpi_std[1].cp_ecx & CPUID_INTC_ECX_AVX) == 0) 3408 return; 3409 3410 add_x86_feature(featureset, X86FSET_AVX); 3411 3412 /* 3413 * Intel says we can't check these without also 3414 * checking AVX. 3415 */ 3416 if (cpi->cpi_std[1].cp_ecx & CPUID_INTC_ECX_F16C) 3417 add_x86_feature(featureset, X86FSET_F16C); 3418 3419 if (cpi->cpi_std[1].cp_ecx & CPUID_INTC_ECX_FMA) 3420 add_x86_feature(featureset, X86FSET_FMA); 3421 3422 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_BMI1) 3423 add_x86_feature(featureset, X86FSET_BMI1); 3424 3425 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_BMI2) 3426 add_x86_feature(featureset, X86FSET_BMI2); 3427 3428 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX2) 3429 add_x86_feature(featureset, X86FSET_AVX2); 3430 3431 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_VAES) 3432 add_x86_feature(featureset, X86FSET_VAES); 3433 3434 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_VPCLMULQDQ) 3435 add_x86_feature(featureset, X86FSET_VPCLMULQDQ); 3436 3437 /* 3438 * The rest of the AVX features require AVX512. Do not check them unless 3439 * it is present. 3440 */ 3441 if ((cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512F) == 0) 3442 return; 3443 add_x86_feature(featureset, X86FSET_AVX512F); 3444 3445 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512DQ) 3446 add_x86_feature(featureset, X86FSET_AVX512DQ); 3447 3448 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512IFMA) 3449 add_x86_feature(featureset, X86FSET_AVX512FMA); 3450 3451 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512PF) 3452 add_x86_feature(featureset, X86FSET_AVX512PF); 3453 3454 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512ER) 3455 add_x86_feature(featureset, X86FSET_AVX512ER); 3456 3457 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512CD) 3458 add_x86_feature(featureset, X86FSET_AVX512CD); 3459 3460 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512BW) 3461 add_x86_feature(featureset, X86FSET_AVX512BW); 3462 3463 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_AVX512VL) 3464 add_x86_feature(featureset, X86FSET_AVX512VL); 3465 3466 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_AVX512VBMI) 3467 add_x86_feature(featureset, X86FSET_AVX512VBMI); 3468 3469 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_AVX512VBMI2) 3470 add_x86_feature(featureset, X86FSET_AVX512_VBMI2); 3471 3472 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_AVX512VNNI) 3473 add_x86_feature(featureset, X86FSET_AVX512VNNI); 3474 3475 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_AVX512BITALG) 3476 add_x86_feature(featureset, X86FSET_AVX512_BITALG); 3477 3478 if (cpi->cpi_std[7].cp_ecx & CPUID_INTC_ECX_7_0_AVX512VPOPCDQ) 3479 add_x86_feature(featureset, X86FSET_AVX512VPOPCDQ); 3480 3481 if (cpi->cpi_std[7].cp_edx & CPUID_INTC_EDX_7_0_AVX5124NNIW) 3482 add_x86_feature(featureset, X86FSET_AVX512NNIW); 3483 3484 if (cpi->cpi_std[7].cp_edx & CPUID_INTC_EDX_7_0_AVX5124FMAPS) 3485 add_x86_feature(featureset, X86FSET_AVX512FMAPS); 3486 3487 /* 3488 * More features here are in Leaf 7, subleaf 1. Don't bother checking if 3489 * we don't need to. 3490 */ 3491 if (cpi->cpi_std[7].cp_eax < 1) 3492 return; 3493 3494 if (cpi->cpi_sub7[0].cp_eax & CPUID_INTC_EAX_7_1_AVX512_BF16) 3495 add_x86_feature(featureset, X86FSET_AVX512_BF16); 3496 } 3497 3498 /* 3499 * PPIN is the protected processor inventory number. On AMD this is an actual 3500 * feature bit. However, on Intel systems we need to read the platform 3501 * information MSR if we're on a specific model. 3502 */ 3503 #if !defined(__xpv) 3504 static void 3505 cpuid_basic_ppin(cpu_t *cpu, uchar_t *featureset) 3506 { 3507 on_trap_data_t otd; 3508 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 3509 3510 switch (cpi->cpi_vendor) { 3511 case X86_VENDOR_AMD: 3512 /* 3513 * This leaf will have already been gathered in the topology 3514 * functions. 3515 */ 3516 if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8) { 3517 if (cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_PPIN) { 3518 add_x86_feature(featureset, X86FSET_PPIN); 3519 } 3520 } 3521 break; 3522 case X86_VENDOR_Intel: 3523 if (cpi->cpi_family != 6) 3524 break; 3525 switch (cpi->cpi_model) { 3526 case INTC_MODEL_IVYBRIDGE_XEON: 3527 case INTC_MODEL_HASWELL_XEON: 3528 case INTC_MODEL_BROADWELL_XEON: 3529 case INTC_MODEL_BROADWELL_XEON_D: 3530 case INTC_MODEL_SKYLAKE_XEON: 3531 case INTC_MODEL_ICELAKE_XEON: 3532 if (!on_trap(&otd, OT_DATA_ACCESS)) { 3533 uint64_t value; 3534 3535 value = rdmsr(MSR_PLATFORM_INFO); 3536 if ((value & MSR_PLATFORM_INFO_PPIN) != 0) { 3537 add_x86_feature(featureset, 3538 X86FSET_PPIN); 3539 } 3540 } 3541 no_trap(); 3542 break; 3543 default: 3544 break; 3545 } 3546 break; 3547 default: 3548 break; 3549 } 3550 } 3551 #endif /* ! __xpv */ 3552 3553 static void 3554 cpuid_pass_prelude(cpu_t *cpu, void *arg) 3555 { 3556 uchar_t *featureset = (uchar_t *)arg; 3557 3558 /* 3559 * We don't run on any processor that doesn't have cpuid, and could not 3560 * possibly have arrived here. 3561 */ 3562 add_x86_feature(featureset, X86FSET_CPUID); 3563 } 3564 3565 static void 3566 cpuid_pass_ident(cpu_t *cpu, void *arg __unused) 3567 { 3568 struct cpuid_info *cpi; 3569 struct cpuid_regs *cp; 3570 3571 /* 3572 * We require that virtual/native detection be complete and that PCI 3573 * config space access has been set up; at present there is no reliable 3574 * way to determine the latter. 3575 */ 3576 #if !defined(__xpv) 3577 ASSERT3S(platform_type, !=, -1); 3578 #endif /* !__xpv */ 3579 3580 cpi = cpu->cpu_m.mcpu_cpi; 3581 ASSERT(cpi != NULL); 3582 3583 cp = &cpi->cpi_std[0]; 3584 cp->cp_eax = 0; 3585 cpi->cpi_maxeax = __cpuid_insn(cp); 3586 { 3587 uint32_t *iptr = (uint32_t *)cpi->cpi_vendorstr; 3588 *iptr++ = cp->cp_ebx; 3589 *iptr++ = cp->cp_edx; 3590 *iptr++ = cp->cp_ecx; 3591 *(char *)&cpi->cpi_vendorstr[12] = '\0'; 3592 } 3593 3594 cpi->cpi_vendor = _cpuid_vendorstr_to_vendorcode(cpi->cpi_vendorstr); 3595 x86_vendor = cpi->cpi_vendor; /* for compatibility */ 3596 3597 /* 3598 * Limit the range in case of weird hardware 3599 */ 3600 if (cpi->cpi_maxeax > CPI_MAXEAX_MAX) 3601 cpi->cpi_maxeax = CPI_MAXEAX_MAX; 3602 if (cpi->cpi_maxeax < 1) 3603 return; 3604 3605 cp = &cpi->cpi_std[1]; 3606 cp->cp_eax = 1; 3607 (void) __cpuid_insn(cp); 3608 3609 /* 3610 * Extract identifying constants for easy access. 3611 */ 3612 cpi->cpi_model = CPI_MODEL(cpi); 3613 cpi->cpi_family = CPI_FAMILY(cpi); 3614 3615 if (cpi->cpi_family == 0xf) 3616 cpi->cpi_family += CPI_FAMILY_XTD(cpi); 3617 3618 /* 3619 * Beware: AMD uses "extended model" iff base *FAMILY* == 0xf. 3620 * Intel, and presumably everyone else, uses model == 0xf, as 3621 * one would expect (max value means possible overflow). Sigh. 3622 */ 3623 3624 switch (cpi->cpi_vendor) { 3625 case X86_VENDOR_Intel: 3626 if (IS_EXTENDED_MODEL_INTEL(cpi)) 3627 cpi->cpi_model += CPI_MODEL_XTD(cpi) << 4; 3628 break; 3629 case X86_VENDOR_AMD: 3630 if (CPI_FAMILY(cpi) == 0xf) 3631 cpi->cpi_model += CPI_MODEL_XTD(cpi) << 4; 3632 break; 3633 case X86_VENDOR_HYGON: 3634 cpi->cpi_model += CPI_MODEL_XTD(cpi) << 4; 3635 break; 3636 default: 3637 if (cpi->cpi_model == 0xf) 3638 cpi->cpi_model += CPI_MODEL_XTD(cpi) << 4; 3639 break; 3640 } 3641 3642 cpi->cpi_step = CPI_STEP(cpi); 3643 cpi->cpi_brandid = CPI_BRANDID(cpi); 3644 3645 /* 3646 * Synthesize chip "revision" and socket type 3647 */ 3648 cpi->cpi_chiprev = _cpuid_chiprev(cpi->cpi_vendor, cpi->cpi_family, 3649 cpi->cpi_model, cpi->cpi_step); 3650 cpi->cpi_chiprevstr = _cpuid_chiprevstr(cpi->cpi_vendor, 3651 cpi->cpi_family, cpi->cpi_model, cpi->cpi_step); 3652 cpi->cpi_socket = _cpuid_skt(cpi->cpi_vendor, cpi->cpi_family, 3653 cpi->cpi_model, cpi->cpi_step); 3654 cpi->cpi_uarchrev = _cpuid_uarchrev(cpi->cpi_vendor, cpi->cpi_family, 3655 cpi->cpi_model, cpi->cpi_step); 3656 } 3657 3658 static void 3659 cpuid_pass_basic(cpu_t *cpu, void *arg) 3660 { 3661 uchar_t *featureset = (uchar_t *)arg; 3662 uint32_t mask_ecx, mask_edx; 3663 struct cpuid_info *cpi; 3664 struct cpuid_regs *cp; 3665 int xcpuid; 3666 #if !defined(__xpv) 3667 extern int idle_cpu_prefer_mwait; 3668 #endif 3669 3670 cpi = cpu->cpu_m.mcpu_cpi; 3671 ASSERT(cpi != NULL); 3672 3673 if (cpi->cpi_maxeax < 1) 3674 return; 3675 3676 /* 3677 * This was filled during the identification pass. 3678 */ 3679 cp = &cpi->cpi_std[1]; 3680 3681 /* 3682 * *default* assumptions: 3683 * - believe %edx feature word 3684 * - ignore %ecx feature word 3685 * - 32-bit virtual and physical addressing 3686 */ 3687 mask_edx = 0xffffffff; 3688 mask_ecx = 0; 3689 3690 cpi->cpi_pabits = cpi->cpi_vabits = 32; 3691 3692 switch (cpi->cpi_vendor) { 3693 case X86_VENDOR_Intel: 3694 if (cpi->cpi_family == 5) 3695 x86_type = X86_TYPE_P5; 3696 else if (IS_LEGACY_P6(cpi)) { 3697 x86_type = X86_TYPE_P6; 3698 pentiumpro_bug4046376 = 1; 3699 /* 3700 * Clear the SEP bit when it was set erroneously 3701 */ 3702 if (cpi->cpi_model < 3 && cpi->cpi_step < 3) 3703 cp->cp_edx &= ~CPUID_INTC_EDX_SEP; 3704 } else if (IS_NEW_F6(cpi) || cpi->cpi_family == 0xf) { 3705 x86_type = X86_TYPE_P4; 3706 /* 3707 * We don't currently depend on any of the %ecx 3708 * features until Prescott, so we'll only check 3709 * this from P4 onwards. We might want to revisit 3710 * that idea later. 3711 */ 3712 mask_ecx = 0xffffffff; 3713 } else if (cpi->cpi_family > 0xf) 3714 mask_ecx = 0xffffffff; 3715 /* 3716 * We don't support MONITOR/MWAIT if leaf 5 is not available 3717 * to obtain the monitor linesize. 3718 */ 3719 if (cpi->cpi_maxeax < 5) 3720 mask_ecx &= ~CPUID_INTC_ECX_MON; 3721 break; 3722 case X86_VENDOR_IntelClone: 3723 default: 3724 break; 3725 case X86_VENDOR_AMD: 3726 #if defined(OPTERON_ERRATUM_108) 3727 if (cpi->cpi_family == 0xf && cpi->cpi_model == 0xe) { 3728 cp->cp_eax = (0xf0f & cp->cp_eax) | 0xc0; 3729 cpi->cpi_model = 0xc; 3730 } else 3731 #endif 3732 if (cpi->cpi_family == 5) { 3733 /* 3734 * AMD K5 and K6 3735 * 3736 * These CPUs have an incomplete implementation 3737 * of MCA/MCE which we mask away. 3738 */ 3739 mask_edx &= ~(CPUID_INTC_EDX_MCE | CPUID_INTC_EDX_MCA); 3740 3741 /* 3742 * Model 0 uses the wrong (APIC) bit 3743 * to indicate PGE. Fix it here. 3744 */ 3745 if (cpi->cpi_model == 0) { 3746 if (cp->cp_edx & 0x200) { 3747 cp->cp_edx &= ~0x200; 3748 cp->cp_edx |= CPUID_INTC_EDX_PGE; 3749 } 3750 } 3751 3752 /* 3753 * Early models had problems w/ MMX; disable. 3754 */ 3755 if (cpi->cpi_model < 6) 3756 mask_edx &= ~CPUID_INTC_EDX_MMX; 3757 } 3758 3759 /* 3760 * For newer families, SSE3 and CX16, at least, are valid; 3761 * enable all 3762 */ 3763 if (cpi->cpi_family >= 0xf) 3764 mask_ecx = 0xffffffff; 3765 /* 3766 * We don't support MONITOR/MWAIT if leaf 5 is not available 3767 * to obtain the monitor linesize. 3768 */ 3769 if (cpi->cpi_maxeax < 5) 3770 mask_ecx &= ~CPUID_INTC_ECX_MON; 3771 3772 #if !defined(__xpv) 3773 /* 3774 * AMD has not historically used MWAIT in the CPU's idle loop. 3775 * Pre-family-10h Opterons do not have the MWAIT instruction. We 3776 * know for certain that in at least family 17h, per AMD, mwait 3777 * is preferred. Families in-between are less certain. 3778 */ 3779 if (cpi->cpi_family < 0x17) { 3780 idle_cpu_prefer_mwait = 0; 3781 } 3782 #endif 3783 3784 break; 3785 case X86_VENDOR_HYGON: 3786 /* Enable all for Hygon Dhyana CPU */ 3787 mask_ecx = 0xffffffff; 3788 break; 3789 case X86_VENDOR_TM: 3790 /* 3791 * workaround the NT workaround in CMS 4.1 3792 */ 3793 if (cpi->cpi_family == 5 && cpi->cpi_model == 4 && 3794 (cpi->cpi_step == 2 || cpi->cpi_step == 3)) 3795 cp->cp_edx |= CPUID_INTC_EDX_CX8; 3796 break; 3797 case X86_VENDOR_Centaur: 3798 /* 3799 * workaround the NT workarounds again 3800 */ 3801 if (cpi->cpi_family == 6) 3802 cp->cp_edx |= CPUID_INTC_EDX_CX8; 3803 break; 3804 case X86_VENDOR_Cyrix: 3805 /* 3806 * We rely heavily on the probing in locore 3807 * to actually figure out what parts, if any, 3808 * of the Cyrix cpuid instruction to believe. 3809 */ 3810 switch (x86_type) { 3811 case X86_TYPE_CYRIX_486: 3812 mask_edx = 0; 3813 break; 3814 case X86_TYPE_CYRIX_6x86: 3815 mask_edx = 0; 3816 break; 3817 case X86_TYPE_CYRIX_6x86L: 3818 mask_edx = 3819 CPUID_INTC_EDX_DE | 3820 CPUID_INTC_EDX_CX8; 3821 break; 3822 case X86_TYPE_CYRIX_6x86MX: 3823 mask_edx = 3824 CPUID_INTC_EDX_DE | 3825 CPUID_INTC_EDX_MSR | 3826 CPUID_INTC_EDX_CX8 | 3827 CPUID_INTC_EDX_PGE | 3828 CPUID_INTC_EDX_CMOV | 3829 CPUID_INTC_EDX_MMX; 3830 break; 3831 case X86_TYPE_CYRIX_GXm: 3832 mask_edx = 3833 CPUID_INTC_EDX_MSR | 3834 CPUID_INTC_EDX_CX8 | 3835 CPUID_INTC_EDX_CMOV | 3836 CPUID_INTC_EDX_MMX; 3837 break; 3838 case X86_TYPE_CYRIX_MediaGX: 3839 break; 3840 case X86_TYPE_CYRIX_MII: 3841 case X86_TYPE_VIA_CYRIX_III: 3842 mask_edx = 3843 CPUID_INTC_EDX_DE | 3844 CPUID_INTC_EDX_TSC | 3845 CPUID_INTC_EDX_MSR | 3846 CPUID_INTC_EDX_CX8 | 3847 CPUID_INTC_EDX_PGE | 3848 CPUID_INTC_EDX_CMOV | 3849 CPUID_INTC_EDX_MMX; 3850 break; 3851 default: 3852 break; 3853 } 3854 break; 3855 } 3856 3857 #if defined(__xpv) 3858 /* 3859 * Do not support MONITOR/MWAIT under a hypervisor 3860 */ 3861 mask_ecx &= ~CPUID_INTC_ECX_MON; 3862 /* 3863 * Do not support XSAVE under a hypervisor for now 3864 */ 3865 xsave_force_disable = B_TRUE; 3866 3867 #endif /* __xpv */ 3868 3869 if (xsave_force_disable) { 3870 mask_ecx &= ~CPUID_INTC_ECX_XSAVE; 3871 mask_ecx &= ~CPUID_INTC_ECX_AVX; 3872 mask_ecx &= ~CPUID_INTC_ECX_F16C; 3873 mask_ecx &= ~CPUID_INTC_ECX_FMA; 3874 } 3875 3876 /* 3877 * Now we've figured out the masks that determine 3878 * which bits we choose to believe, apply the masks 3879 * to the feature words, then map the kernel's view 3880 * of these feature words into its feature word. 3881 */ 3882 cp->cp_edx &= mask_edx; 3883 cp->cp_ecx &= mask_ecx; 3884 3885 /* 3886 * apply any platform restrictions (we don't call this 3887 * immediately after __cpuid_insn here, because we need the 3888 * workarounds applied above first) 3889 */ 3890 platform_cpuid_mangle(cpi->cpi_vendor, 1, cp); 3891 3892 /* 3893 * In addition to ecx and edx, Intel and AMD are storing a bunch of 3894 * instruction set extensions in leaf 7's ebx, ecx, and edx. Note, leaf 3895 * 7 has sub-leaves determined by ecx. 3896 */ 3897 if (cpi->cpi_maxeax >= 7) { 3898 struct cpuid_regs *ecp; 3899 ecp = &cpi->cpi_std[7]; 3900 ecp->cp_eax = 7; 3901 ecp->cp_ecx = 0; 3902 (void) __cpuid_insn(ecp); 3903 3904 /* 3905 * If XSAVE has been disabled, just ignore all of the 3906 * extended-save-area dependent flags here. By removing most of 3907 * the leaf 7, sub-leaf 0 flags, that will ensure tha we don't 3908 * end up looking at additional xsave dependent leaves right 3909 * now. 3910 */ 3911 if (xsave_force_disable) { 3912 ecp->cp_ebx &= ~CPUID_INTC_EBX_7_0_BMI1; 3913 ecp->cp_ebx &= ~CPUID_INTC_EBX_7_0_BMI2; 3914 ecp->cp_ebx &= ~CPUID_INTC_EBX_7_0_AVX2; 3915 ecp->cp_ebx &= ~CPUID_INTC_EBX_7_0_MPX; 3916 ecp->cp_ebx &= ~CPUID_INTC_EBX_7_0_ALL_AVX512; 3917 ecp->cp_ecx &= ~CPUID_INTC_ECX_7_0_ALL_AVX512; 3918 ecp->cp_edx &= ~CPUID_INTC_EDX_7_0_ALL_AVX512; 3919 ecp->cp_ecx &= ~CPUID_INTC_ECX_7_0_VAES; 3920 ecp->cp_ecx &= ~CPUID_INTC_ECX_7_0_VPCLMULQDQ; 3921 ecp->cp_ecx &= ~CPUID_INTC_ECX_7_0_GFNI; 3922 } 3923 3924 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_SMEP) 3925 add_x86_feature(featureset, X86FSET_SMEP); 3926 3927 /* 3928 * We check disable_smap here in addition to in startup_smap() 3929 * to ensure CPUs that aren't the boot CPU don't accidentally 3930 * include it in the feature set and thus generate a mismatched 3931 * x86 feature set across CPUs. 3932 */ 3933 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_SMAP && 3934 disable_smap == 0) 3935 add_x86_feature(featureset, X86FSET_SMAP); 3936 3937 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_RDSEED) 3938 add_x86_feature(featureset, X86FSET_RDSEED); 3939 3940 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_ADX) 3941 add_x86_feature(featureset, X86FSET_ADX); 3942 3943 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_FSGSBASE) 3944 add_x86_feature(featureset, X86FSET_FSGSBASE); 3945 3946 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_CLFLUSHOPT) 3947 add_x86_feature(featureset, X86FSET_CLFLUSHOPT); 3948 3949 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_INVPCID) 3950 add_x86_feature(featureset, X86FSET_INVPCID); 3951 3952 if (ecp->cp_ecx & CPUID_INTC_ECX_7_0_UMIP) 3953 add_x86_feature(featureset, X86FSET_UMIP); 3954 if (ecp->cp_ecx & CPUID_INTC_ECX_7_0_PKU) 3955 add_x86_feature(featureset, X86FSET_PKU); 3956 if (ecp->cp_ecx & CPUID_INTC_ECX_7_0_OSPKE) 3957 add_x86_feature(featureset, X86FSET_OSPKE); 3958 if (ecp->cp_ecx & CPUID_INTC_ECX_7_0_GFNI) 3959 add_x86_feature(featureset, X86FSET_GFNI); 3960 3961 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_CLWB) 3962 add_x86_feature(featureset, X86FSET_CLWB); 3963 3964 if (cpi->cpi_vendor == X86_VENDOR_Intel) { 3965 if (ecp->cp_ebx & CPUID_INTC_EBX_7_0_MPX) 3966 add_x86_feature(featureset, X86FSET_MPX); 3967 } 3968 3969 /* 3970 * If we have subleaf 1 available, grab and store that. This is 3971 * used for more AVX and related features. 3972 */ 3973 if (ecp->cp_eax >= 1) { 3974 struct cpuid_regs *c71; 3975 c71 = &cpi->cpi_sub7[0]; 3976 c71->cp_eax = 7; 3977 c71->cp_ecx = 1; 3978 (void) __cpuid_insn(c71); 3979 } 3980 } 3981 3982 /* 3983 * fold in overrides from the "eeprom" mechanism 3984 */ 3985 cp->cp_edx |= cpuid_feature_edx_include; 3986 cp->cp_edx &= ~cpuid_feature_edx_exclude; 3987 3988 cp->cp_ecx |= cpuid_feature_ecx_include; 3989 cp->cp_ecx &= ~cpuid_feature_ecx_exclude; 3990 3991 if (cp->cp_edx & CPUID_INTC_EDX_PSE) { 3992 add_x86_feature(featureset, X86FSET_LARGEPAGE); 3993 } 3994 if (cp->cp_edx & CPUID_INTC_EDX_TSC) { 3995 add_x86_feature(featureset, X86FSET_TSC); 3996 } 3997 if (cp->cp_edx & CPUID_INTC_EDX_MSR) { 3998 add_x86_feature(featureset, X86FSET_MSR); 3999 } 4000 if (cp->cp_edx & CPUID_INTC_EDX_MTRR) { 4001 add_x86_feature(featureset, X86FSET_MTRR); 4002 } 4003 if (cp->cp_edx & CPUID_INTC_EDX_PGE) { 4004 add_x86_feature(featureset, X86FSET_PGE); 4005 } 4006 if (cp->cp_edx & CPUID_INTC_EDX_CMOV) { 4007 add_x86_feature(featureset, X86FSET_CMOV); 4008 } 4009 if (cp->cp_edx & CPUID_INTC_EDX_MMX) { 4010 add_x86_feature(featureset, X86FSET_MMX); 4011 } 4012 if ((cp->cp_edx & CPUID_INTC_EDX_MCE) != 0 && 4013 (cp->cp_edx & CPUID_INTC_EDX_MCA) != 0) { 4014 add_x86_feature(featureset, X86FSET_MCA); 4015 } 4016 if (cp->cp_edx & CPUID_INTC_EDX_PAE) { 4017 add_x86_feature(featureset, X86FSET_PAE); 4018 } 4019 if (cp->cp_edx & CPUID_INTC_EDX_CX8) { 4020 add_x86_feature(featureset, X86FSET_CX8); 4021 } 4022 if (cp->cp_ecx & CPUID_INTC_ECX_CX16) { 4023 add_x86_feature(featureset, X86FSET_CX16); 4024 } 4025 if (cp->cp_edx & CPUID_INTC_EDX_PAT) { 4026 add_x86_feature(featureset, X86FSET_PAT); 4027 } 4028 if (cp->cp_edx & CPUID_INTC_EDX_SEP) { 4029 add_x86_feature(featureset, X86FSET_SEP); 4030 } 4031 if (cp->cp_edx & CPUID_INTC_EDX_FXSR) { 4032 /* 4033 * In our implementation, fxsave/fxrstor 4034 * are prerequisites before we'll even 4035 * try and do SSE things. 4036 */ 4037 if (cp->cp_edx & CPUID_INTC_EDX_SSE) { 4038 add_x86_feature(featureset, X86FSET_SSE); 4039 } 4040 if (cp->cp_edx & CPUID_INTC_EDX_SSE2) { 4041 add_x86_feature(featureset, X86FSET_SSE2); 4042 } 4043 if (cp->cp_ecx & CPUID_INTC_ECX_SSE3) { 4044 add_x86_feature(featureset, X86FSET_SSE3); 4045 } 4046 if (cp->cp_ecx & CPUID_INTC_ECX_SSSE3) { 4047 add_x86_feature(featureset, X86FSET_SSSE3); 4048 } 4049 if (cp->cp_ecx & CPUID_INTC_ECX_SSE4_1) { 4050 add_x86_feature(featureset, X86FSET_SSE4_1); 4051 } 4052 if (cp->cp_ecx & CPUID_INTC_ECX_SSE4_2) { 4053 add_x86_feature(featureset, X86FSET_SSE4_2); 4054 } 4055 if (cp->cp_ecx & CPUID_INTC_ECX_AES) { 4056 add_x86_feature(featureset, X86FSET_AES); 4057 } 4058 if (cp->cp_ecx & CPUID_INTC_ECX_PCLMULQDQ) { 4059 add_x86_feature(featureset, X86FSET_PCLMULQDQ); 4060 } 4061 4062 if (cpi->cpi_std[7].cp_ebx & CPUID_INTC_EBX_7_0_SHA) 4063 add_x86_feature(featureset, X86FSET_SHA); 4064 4065 if (cp->cp_ecx & CPUID_INTC_ECX_XSAVE) { 4066 add_x86_feature(featureset, X86FSET_XSAVE); 4067 4068 /* We only test AVX & AVX512 when there is XSAVE */ 4069 cpuid_basic_avx(cpu, featureset); 4070 } 4071 } 4072 4073 if (cp->cp_ecx & CPUID_INTC_ECX_PCID) { 4074 add_x86_feature(featureset, X86FSET_PCID); 4075 } 4076 4077 if (cp->cp_ecx & CPUID_INTC_ECX_X2APIC) { 4078 add_x86_feature(featureset, X86FSET_X2APIC); 4079 } 4080 if (cp->cp_edx & CPUID_INTC_EDX_DE) { 4081 add_x86_feature(featureset, X86FSET_DE); 4082 } 4083 #if !defined(__xpv) 4084 if (cp->cp_ecx & CPUID_INTC_ECX_MON) { 4085 4086 /* 4087 * We require the CLFLUSH instruction for erratum workaround 4088 * to use MONITOR/MWAIT. 4089 */ 4090 if (cp->cp_edx & CPUID_INTC_EDX_CLFSH) { 4091 cpi->cpi_mwait.support |= MWAIT_SUPPORT; 4092 add_x86_feature(featureset, X86FSET_MWAIT); 4093 } else { 4094 extern int idle_cpu_assert_cflush_monitor; 4095 4096 /* 4097 * All processors we are aware of which have 4098 * MONITOR/MWAIT also have CLFLUSH. 4099 */ 4100 if (idle_cpu_assert_cflush_monitor) { 4101 ASSERT((cp->cp_ecx & CPUID_INTC_ECX_MON) && 4102 (cp->cp_edx & CPUID_INTC_EDX_CLFSH)); 4103 } 4104 } 4105 } 4106 #endif /* __xpv */ 4107 4108 if (cp->cp_ecx & CPUID_INTC_ECX_VMX) { 4109 add_x86_feature(featureset, X86FSET_VMX); 4110 } 4111 4112 if (cp->cp_ecx & CPUID_INTC_ECX_RDRAND) 4113 add_x86_feature(featureset, X86FSET_RDRAND); 4114 4115 /* 4116 * Only need it first time, rest of the cpus would follow suit. 4117 * we only capture this for the bootcpu. 4118 */ 4119 if (cp->cp_edx & CPUID_INTC_EDX_CLFSH) { 4120 add_x86_feature(featureset, X86FSET_CLFSH); 4121 x86_clflush_size = (BITX(cp->cp_ebx, 15, 8) * 8); 4122 } 4123 if (is_x86_feature(featureset, X86FSET_PAE)) 4124 cpi->cpi_pabits = 36; 4125 4126 if (cpi->cpi_maxeax >= 0xD && !xsave_force_disable) { 4127 struct cpuid_regs r, *ecp; 4128 4129 ecp = &r; 4130 ecp->cp_eax = 0xD; 4131 ecp->cp_ecx = 1; 4132 ecp->cp_edx = ecp->cp_ebx = 0; 4133 (void) __cpuid_insn(ecp); 4134 4135 if (ecp->cp_eax & CPUID_INTC_EAX_D_1_XSAVEOPT) 4136 add_x86_feature(featureset, X86FSET_XSAVEOPT); 4137 if (ecp->cp_eax & CPUID_INTC_EAX_D_1_XSAVEC) 4138 add_x86_feature(featureset, X86FSET_XSAVEC); 4139 if (ecp->cp_eax & CPUID_INTC_EAX_D_1_XSAVES) 4140 add_x86_feature(featureset, X86FSET_XSAVES); 4141 } 4142 4143 /* 4144 * Work on the "extended" feature information, doing 4145 * some basic initialization to be used in the extended pass. 4146 */ 4147 xcpuid = 0; 4148 switch (cpi->cpi_vendor) { 4149 case X86_VENDOR_Intel: 4150 /* 4151 * On KVM we know we will have proper support for extended 4152 * cpuid. 4153 */ 4154 if (IS_NEW_F6(cpi) || cpi->cpi_family >= 0xf || 4155 (get_hwenv() == HW_KVM && cpi->cpi_family == 6 && 4156 (cpi->cpi_model == 6 || cpi->cpi_model == 2))) 4157 xcpuid++; 4158 break; 4159 case X86_VENDOR_AMD: 4160 if (cpi->cpi_family > 5 || 4161 (cpi->cpi_family == 5 && cpi->cpi_model >= 1)) 4162 xcpuid++; 4163 break; 4164 case X86_VENDOR_Cyrix: 4165 /* 4166 * Only these Cyrix CPUs are -known- to support 4167 * extended cpuid operations. 4168 */ 4169 if (x86_type == X86_TYPE_VIA_CYRIX_III || 4170 x86_type == X86_TYPE_CYRIX_GXm) 4171 xcpuid++; 4172 break; 4173 case X86_VENDOR_HYGON: 4174 case X86_VENDOR_Centaur: 4175 case X86_VENDOR_TM: 4176 default: 4177 xcpuid++; 4178 break; 4179 } 4180 4181 if (xcpuid) { 4182 cp = &cpi->cpi_extd[0]; 4183 cp->cp_eax = CPUID_LEAF_EXT_0; 4184 cpi->cpi_xmaxeax = __cpuid_insn(cp); 4185 } 4186 4187 if (cpi->cpi_xmaxeax & CPUID_LEAF_EXT_0) { 4188 4189 if (cpi->cpi_xmaxeax > CPI_XMAXEAX_MAX) 4190 cpi->cpi_xmaxeax = CPI_XMAXEAX_MAX; 4191 4192 switch (cpi->cpi_vendor) { 4193 case X86_VENDOR_Intel: 4194 case X86_VENDOR_AMD: 4195 case X86_VENDOR_HYGON: 4196 if (cpi->cpi_xmaxeax < 0x80000001) 4197 break; 4198 cp = &cpi->cpi_extd[1]; 4199 cp->cp_eax = 0x80000001; 4200 (void) __cpuid_insn(cp); 4201 4202 if (cpi->cpi_vendor == X86_VENDOR_AMD && 4203 cpi->cpi_family == 5 && 4204 cpi->cpi_model == 6 && 4205 cpi->cpi_step == 6) { 4206 /* 4207 * K6 model 6 uses bit 10 to indicate SYSC 4208 * Later models use bit 11. Fix it here. 4209 */ 4210 if (cp->cp_edx & 0x400) { 4211 cp->cp_edx &= ~0x400; 4212 cp->cp_edx |= CPUID_AMD_EDX_SYSC; 4213 } 4214 } 4215 4216 platform_cpuid_mangle(cpi->cpi_vendor, 0x80000001, cp); 4217 4218 /* 4219 * Compute the additions to the kernel's feature word. 4220 */ 4221 if (cp->cp_edx & CPUID_AMD_EDX_NX) { 4222 add_x86_feature(featureset, X86FSET_NX); 4223 } 4224 4225 /* 4226 * Regardless whether or not we boot 64-bit, 4227 * we should have a way to identify whether 4228 * the CPU is capable of running 64-bit. 4229 */ 4230 if (cp->cp_edx & CPUID_AMD_EDX_LM) { 4231 add_x86_feature(featureset, X86FSET_64); 4232 } 4233 4234 /* 1 GB large page - enable only for 64 bit kernel */ 4235 if (cp->cp_edx & CPUID_AMD_EDX_1GPG) { 4236 add_x86_feature(featureset, X86FSET_1GPG); 4237 } 4238 4239 if ((cpi->cpi_vendor == X86_VENDOR_AMD || 4240 cpi->cpi_vendor == X86_VENDOR_HYGON) && 4241 (cpi->cpi_std[1].cp_edx & CPUID_INTC_EDX_FXSR) && 4242 (cp->cp_ecx & CPUID_AMD_ECX_SSE4A)) { 4243 add_x86_feature(featureset, X86FSET_SSE4A); 4244 } 4245 4246 /* 4247 * It's really tricky to support syscall/sysret in 4248 * the i386 kernel; we rely on sysenter/sysexit 4249 * instead. In the amd64 kernel, things are -way- 4250 * better. 4251 */ 4252 if (cp->cp_edx & CPUID_AMD_EDX_SYSC) { 4253 add_x86_feature(featureset, X86FSET_ASYSC); 4254 } 4255 4256 /* 4257 * While we're thinking about system calls, note 4258 * that AMD processors don't support sysenter 4259 * in long mode at all, so don't try to program them. 4260 */ 4261 if (x86_vendor == X86_VENDOR_AMD || 4262 x86_vendor == X86_VENDOR_HYGON) { 4263 remove_x86_feature(featureset, X86FSET_SEP); 4264 } 4265 4266 if (cp->cp_edx & CPUID_AMD_EDX_TSCP) { 4267 add_x86_feature(featureset, X86FSET_TSCP); 4268 } 4269 4270 if (cp->cp_ecx & CPUID_AMD_ECX_SVM) { 4271 add_x86_feature(featureset, X86FSET_SVM); 4272 } 4273 4274 if (cp->cp_ecx & CPUID_AMD_ECX_TOPOEXT) { 4275 add_x86_feature(featureset, X86FSET_TOPOEXT); 4276 } 4277 4278 if (cp->cp_ecx & CPUID_AMD_ECX_PCEC) { 4279 add_x86_feature(featureset, X86FSET_AMD_PCEC); 4280 } 4281 4282 if (cp->cp_ecx & CPUID_AMD_ECX_XOP) { 4283 add_x86_feature(featureset, X86FSET_XOP); 4284 } 4285 4286 if (cp->cp_ecx & CPUID_AMD_ECX_FMA4) { 4287 add_x86_feature(featureset, X86FSET_FMA4); 4288 } 4289 4290 if (cp->cp_ecx & CPUID_AMD_ECX_TBM) { 4291 add_x86_feature(featureset, X86FSET_TBM); 4292 } 4293 4294 if (cp->cp_ecx & CPUID_AMD_ECX_MONITORX) { 4295 add_x86_feature(featureset, X86FSET_MONITORX); 4296 } 4297 break; 4298 default: 4299 break; 4300 } 4301 4302 /* 4303 * Get CPUID data about processor cores and hyperthreads. 4304 */ 4305 switch (cpi->cpi_vendor) { 4306 case X86_VENDOR_Intel: 4307 if (cpi->cpi_maxeax >= 4) { 4308 cp = &cpi->cpi_std[4]; 4309 cp->cp_eax = 4; 4310 cp->cp_ecx = 0; 4311 (void) __cpuid_insn(cp); 4312 platform_cpuid_mangle(cpi->cpi_vendor, 4, cp); 4313 } 4314 /*FALLTHROUGH*/ 4315 case X86_VENDOR_AMD: 4316 case X86_VENDOR_HYGON: 4317 if (cpi->cpi_xmaxeax < CPUID_LEAF_EXT_8) 4318 break; 4319 cp = &cpi->cpi_extd[8]; 4320 cp->cp_eax = CPUID_LEAF_EXT_8; 4321 (void) __cpuid_insn(cp); 4322 platform_cpuid_mangle(cpi->cpi_vendor, CPUID_LEAF_EXT_8, 4323 cp); 4324 4325 /* 4326 * AMD uses ebx for some extended functions. 4327 */ 4328 if (cpi->cpi_vendor == X86_VENDOR_AMD || 4329 cpi->cpi_vendor == X86_VENDOR_HYGON) { 4330 /* 4331 * While we're here, check for the AMD "Error 4332 * Pointer Zero/Restore" feature. This can be 4333 * used to setup the FP save handlers 4334 * appropriately. 4335 */ 4336 if (cp->cp_ebx & CPUID_AMD_EBX_ERR_PTR_ZERO) { 4337 cpi->cpi_fp_amd_save = 0; 4338 } else { 4339 cpi->cpi_fp_amd_save = 1; 4340 } 4341 4342 if (cp->cp_ebx & CPUID_AMD_EBX_CLZERO) { 4343 add_x86_feature(featureset, 4344 X86FSET_CLZERO); 4345 } 4346 } 4347 4348 /* 4349 * Virtual and physical address limits from 4350 * cpuid override previously guessed values. 4351 */ 4352 cpi->cpi_pabits = BITX(cp->cp_eax, 7, 0); 4353 cpi->cpi_vabits = BITX(cp->cp_eax, 15, 8); 4354 break; 4355 default: 4356 break; 4357 } 4358 4359 /* 4360 * Get CPUID data about TSC Invariance in Deep C-State. 4361 */ 4362 switch (cpi->cpi_vendor) { 4363 case X86_VENDOR_Intel: 4364 case X86_VENDOR_AMD: 4365 case X86_VENDOR_HYGON: 4366 if (cpi->cpi_maxeax >= 7) { 4367 cp = &cpi->cpi_extd[7]; 4368 cp->cp_eax = 0x80000007; 4369 cp->cp_ecx = 0; 4370 (void) __cpuid_insn(cp); 4371 } 4372 break; 4373 default: 4374 break; 4375 } 4376 } 4377 4378 /* 4379 * cpuid_basic_ppin assumes that cpuid_basic_topology has already been 4380 * run and thus gathered some of its dependent leaves. 4381 */ 4382 cpuid_basic_topology(cpu, featureset); 4383 cpuid_basic_thermal(cpu, featureset); 4384 #if !defined(__xpv) 4385 cpuid_basic_ppin(cpu, featureset); 4386 #endif 4387 4388 if (cpi->cpi_vendor == X86_VENDOR_AMD || 4389 cpi->cpi_vendor == X86_VENDOR_HYGON) { 4390 if (cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_8 && 4391 cpi->cpi_extd[8].cp_ebx & CPUID_AMD_EBX_ERR_PTR_ZERO) { 4392 /* Special handling for AMD FP not necessary. */ 4393 cpi->cpi_fp_amd_save = 0; 4394 } else { 4395 cpi->cpi_fp_amd_save = 1; 4396 } 4397 } 4398 4399 /* 4400 * Check (and potentially set) if lfence is serializing. 4401 * This is useful for accurate rdtsc measurements and AMD retpolines. 4402 */ 4403 if ((cpi->cpi_vendor == X86_VENDOR_AMD || 4404 cpi->cpi_vendor == X86_VENDOR_HYGON) && 4405 is_x86_feature(featureset, X86FSET_SSE2)) { 4406 /* 4407 * The AMD white paper Software Techniques For Managing 4408 * Speculation on AMD Processors details circumstances for when 4409 * lfence instructions are serializing. 4410 * 4411 * On family 0xf and 0x11, it is inherently so. On family 0x10 4412 * and later (excluding 0x11), a bit in the DE_CFG MSR 4413 * determines the lfence behavior. Per that whitepaper, AMD has 4414 * committed to supporting that MSR on all later CPUs. 4415 */ 4416 if (cpi->cpi_family == 0xf || cpi->cpi_family == 0x11) { 4417 add_x86_feature(featureset, X86FSET_LFENCE_SER); 4418 } else if (cpi->cpi_family >= 0x10) { 4419 #if !defined(__xpv) 4420 uint64_t val; 4421 4422 /* 4423 * Be careful when attempting to enable the bit, and 4424 * verify that it was actually set in case we are 4425 * running in a hypervisor which is less than faithful 4426 * about its emulation of this feature. 4427 */ 4428 on_trap_data_t otd; 4429 if (!on_trap(&otd, OT_DATA_ACCESS)) { 4430 val = rdmsr(MSR_AMD_DE_CFG); 4431 val |= AMD_DE_CFG_LFENCE_DISPATCH; 4432 wrmsr(MSR_AMD_DE_CFG, val); 4433 val = rdmsr(MSR_AMD_DE_CFG); 4434 } else { 4435 val = 0; 4436 } 4437 no_trap(); 4438 4439 if ((val & AMD_DE_CFG_LFENCE_DISPATCH) != 0) { 4440 add_x86_feature(featureset, X86FSET_LFENCE_SER); 4441 } 4442 #endif 4443 } 4444 } else if (cpi->cpi_vendor == X86_VENDOR_Intel && 4445 is_x86_feature(featureset, X86FSET_SSE2)) { 4446 /* 4447 * Documentation and other OSes indicate that lfence is always 4448 * serializing on Intel CPUs. 4449 */ 4450 add_x86_feature(featureset, X86FSET_LFENCE_SER); 4451 } 4452 4453 4454 /* 4455 * Check the processor leaves that are used for security features. 4456 */ 4457 cpuid_scan_security(cpu, featureset); 4458 } 4459 4460 /* 4461 * Make copies of the cpuid table entries we depend on, in 4462 * part for ease of parsing now, in part so that we have only 4463 * one place to correct any of it, in part for ease of 4464 * later export to userland, and in part so we can look at 4465 * this stuff in a crash dump. 4466 */ 4467 4468 static void 4469 cpuid_pass_extended(cpu_t *cpu, void *_arg __unused) 4470 { 4471 uint_t n, nmax; 4472 int i; 4473 struct cpuid_regs *cp; 4474 uint8_t *dp; 4475 uint32_t *iptr; 4476 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 4477 4478 if (cpi->cpi_maxeax < 1) 4479 return; 4480 4481 if ((nmax = cpi->cpi_maxeax + 1) > NMAX_CPI_STD) 4482 nmax = NMAX_CPI_STD; 4483 /* 4484 * (We already handled n == 0 and n == 1 in the basic pass) 4485 */ 4486 for (n = 2, cp = &cpi->cpi_std[2]; n < nmax; n++, cp++) { 4487 /* 4488 * leaves 6 and 7 were handled in the basic pass 4489 */ 4490 if (n == 6 || n == 7) 4491 continue; 4492 4493 cp->cp_eax = n; 4494 4495 /* 4496 * CPUID function 4 expects %ecx to be initialized 4497 * with an index which indicates which cache to return 4498 * information about. The OS is expected to call function 4 4499 * with %ecx set to 0, 1, 2, ... until it returns with 4500 * EAX[4:0] set to 0, which indicates there are no more 4501 * caches. 4502 * 4503 * Here, populate cpi_std[4] with the information returned by 4504 * function 4 when %ecx == 0, and do the rest in a later pass 4505 * when dynamic memory allocation becomes available. 4506 * 4507 * Note: we need to explicitly initialize %ecx here, since 4508 * function 4 may have been previously invoked. 4509 */ 4510 if (n == 4) 4511 cp->cp_ecx = 0; 4512 4513 (void) __cpuid_insn(cp); 4514 platform_cpuid_mangle(cpi->cpi_vendor, n, cp); 4515 switch (n) { 4516 case 2: 4517 /* 4518 * "the lower 8 bits of the %eax register 4519 * contain a value that identifies the number 4520 * of times the cpuid [instruction] has to be 4521 * executed to obtain a complete image of the 4522 * processor's caching systems." 4523 * 4524 * How *do* they make this stuff up? 4525 */ 4526 cpi->cpi_ncache = sizeof (*cp) * 4527 BITX(cp->cp_eax, 7, 0); 4528 if (cpi->cpi_ncache == 0) 4529 break; 4530 cpi->cpi_ncache--; /* skip count byte */ 4531 4532 /* 4533 * Well, for now, rather than attempt to implement 4534 * this slightly dubious algorithm, we just look 4535 * at the first 15 .. 4536 */ 4537 if (cpi->cpi_ncache > (sizeof (*cp) - 1)) 4538 cpi->cpi_ncache = sizeof (*cp) - 1; 4539 4540 dp = cpi->cpi_cacheinfo; 4541 if (BITX(cp->cp_eax, 31, 31) == 0) { 4542 uint8_t *p = (void *)&cp->cp_eax; 4543 for (i = 1; i < 4; i++) 4544 if (p[i] != 0) 4545 *dp++ = p[i]; 4546 } 4547 if (BITX(cp->cp_ebx, 31, 31) == 0) { 4548 uint8_t *p = (void *)&cp->cp_ebx; 4549 for (i = 0; i < 4; i++) 4550 if (p[i] != 0) 4551 *dp++ = p[i]; 4552 } 4553 if (BITX(cp->cp_ecx, 31, 31) == 0) { 4554 uint8_t *p = (void *)&cp->cp_ecx; 4555 for (i = 0; i < 4; i++) 4556 if (p[i] != 0) 4557 *dp++ = p[i]; 4558 } 4559 if (BITX(cp->cp_edx, 31, 31) == 0) { 4560 uint8_t *p = (void *)&cp->cp_edx; 4561 for (i = 0; i < 4; i++) 4562 if (p[i] != 0) 4563 *dp++ = p[i]; 4564 } 4565 break; 4566 4567 case 3: /* Processor serial number, if PSN supported */ 4568 break; 4569 4570 case 4: /* Deterministic cache parameters */ 4571 break; 4572 4573 case 5: /* Monitor/Mwait parameters */ 4574 { 4575 size_t mwait_size; 4576 4577 /* 4578 * check cpi_mwait.support which was set in 4579 * cpuid_pass_basic() 4580 */ 4581 if (!(cpi->cpi_mwait.support & MWAIT_SUPPORT)) 4582 break; 4583 4584 /* 4585 * Protect ourself from insane mwait line size. 4586 * Workaround for incomplete hardware emulator(s). 4587 */ 4588 mwait_size = (size_t)MWAIT_SIZE_MAX(cpi); 4589 if (mwait_size < sizeof (uint32_t) || 4590 !ISP2(mwait_size)) { 4591 #if DEBUG 4592 cmn_err(CE_NOTE, "Cannot handle cpu %d mwait " 4593 "size %ld", cpu->cpu_id, (long)mwait_size); 4594 #endif 4595 break; 4596 } 4597 4598 cpi->cpi_mwait.mon_min = (size_t)MWAIT_SIZE_MIN(cpi); 4599 cpi->cpi_mwait.mon_max = mwait_size; 4600 if (MWAIT_EXTENSION(cpi)) { 4601 cpi->cpi_mwait.support |= MWAIT_EXTENSIONS; 4602 if (MWAIT_INT_ENABLE(cpi)) 4603 cpi->cpi_mwait.support |= 4604 MWAIT_ECX_INT_ENABLE; 4605 } 4606 break; 4607 } 4608 default: 4609 break; 4610 } 4611 } 4612 4613 /* 4614 * XSAVE enumeration 4615 */ 4616 if (cpi->cpi_maxeax >= 0xD) { 4617 struct cpuid_regs regs; 4618 boolean_t cpuid_d_valid = B_TRUE; 4619 4620 cp = ®s; 4621 cp->cp_eax = 0xD; 4622 cp->cp_edx = cp->cp_ebx = cp->cp_ecx = 0; 4623 4624 (void) __cpuid_insn(cp); 4625 4626 /* 4627 * Sanity checks for debug 4628 */ 4629 if ((cp->cp_eax & XFEATURE_LEGACY_FP) == 0 || 4630 (cp->cp_eax & XFEATURE_SSE) == 0) { 4631 cpuid_d_valid = B_FALSE; 4632 } 4633 4634 cpi->cpi_xsave.xsav_hw_features_low = cp->cp_eax; 4635 cpi->cpi_xsave.xsav_hw_features_high = cp->cp_edx; 4636 cpi->cpi_xsave.xsav_max_size = cp->cp_ecx; 4637 4638 /* 4639 * If the hw supports AVX, get the size and offset in the save 4640 * area for the ymm state. 4641 */ 4642 if (cpi->cpi_xsave.xsav_hw_features_low & XFEATURE_AVX) { 4643 cp->cp_eax = 0xD; 4644 cp->cp_ecx = 2; 4645 cp->cp_edx = cp->cp_ebx = 0; 4646 4647 (void) __cpuid_insn(cp); 4648 4649 if (cp->cp_ebx != CPUID_LEAFD_2_YMM_OFFSET || 4650 cp->cp_eax != CPUID_LEAFD_2_YMM_SIZE) { 4651 cpuid_d_valid = B_FALSE; 4652 } 4653 4654 cpi->cpi_xsave.ymm_size = cp->cp_eax; 4655 cpi->cpi_xsave.ymm_offset = cp->cp_ebx; 4656 } 4657 4658 /* 4659 * If the hw supports MPX, get the size and offset in the 4660 * save area for BNDREGS and BNDCSR. 4661 */ 4662 if (cpi->cpi_xsave.xsav_hw_features_low & XFEATURE_MPX) { 4663 cp->cp_eax = 0xD; 4664 cp->cp_ecx = 3; 4665 cp->cp_edx = cp->cp_ebx = 0; 4666 4667 (void) __cpuid_insn(cp); 4668 4669 cpi->cpi_xsave.bndregs_size = cp->cp_eax; 4670 cpi->cpi_xsave.bndregs_offset = cp->cp_ebx; 4671 4672 cp->cp_eax = 0xD; 4673 cp->cp_ecx = 4; 4674 cp->cp_edx = cp->cp_ebx = 0; 4675 4676 (void) __cpuid_insn(cp); 4677 4678 cpi->cpi_xsave.bndcsr_size = cp->cp_eax; 4679 cpi->cpi_xsave.bndcsr_offset = cp->cp_ebx; 4680 } 4681 4682 /* 4683 * If the hw supports AVX512, get the size and offset in the 4684 * save area for the opmask registers and zmm state. 4685 */ 4686 if (cpi->cpi_xsave.xsav_hw_features_low & XFEATURE_AVX512) { 4687 cp->cp_eax = 0xD; 4688 cp->cp_ecx = 5; 4689 cp->cp_edx = cp->cp_ebx = 0; 4690 4691 (void) __cpuid_insn(cp); 4692 4693 cpi->cpi_xsave.opmask_size = cp->cp_eax; 4694 cpi->cpi_xsave.opmask_offset = cp->cp_ebx; 4695 4696 cp->cp_eax = 0xD; 4697 cp->cp_ecx = 6; 4698 cp->cp_edx = cp->cp_ebx = 0; 4699 4700 (void) __cpuid_insn(cp); 4701 4702 cpi->cpi_xsave.zmmlo_size = cp->cp_eax; 4703 cpi->cpi_xsave.zmmlo_offset = cp->cp_ebx; 4704 4705 cp->cp_eax = 0xD; 4706 cp->cp_ecx = 7; 4707 cp->cp_edx = cp->cp_ebx = 0; 4708 4709 (void) __cpuid_insn(cp); 4710 4711 cpi->cpi_xsave.zmmhi_size = cp->cp_eax; 4712 cpi->cpi_xsave.zmmhi_offset = cp->cp_ebx; 4713 } 4714 4715 if (is_x86_feature(x86_featureset, X86FSET_XSAVE)) { 4716 xsave_state_size = 0; 4717 } else if (cpuid_d_valid) { 4718 xsave_state_size = cpi->cpi_xsave.xsav_max_size; 4719 } else { 4720 /* Broken CPUID 0xD, probably in HVM */ 4721 cmn_err(CE_WARN, "cpu%d: CPUID.0xD returns invalid " 4722 "value: hw_low = %d, hw_high = %d, xsave_size = %d" 4723 ", ymm_size = %d, ymm_offset = %d\n", 4724 cpu->cpu_id, cpi->cpi_xsave.xsav_hw_features_low, 4725 cpi->cpi_xsave.xsav_hw_features_high, 4726 (int)cpi->cpi_xsave.xsav_max_size, 4727 (int)cpi->cpi_xsave.ymm_size, 4728 (int)cpi->cpi_xsave.ymm_offset); 4729 4730 if (xsave_state_size != 0) { 4731 /* 4732 * This must be a non-boot CPU. We cannot 4733 * continue, because boot cpu has already 4734 * enabled XSAVE. 4735 */ 4736 ASSERT(cpu->cpu_id != 0); 4737 cmn_err(CE_PANIC, "cpu%d: we have already " 4738 "enabled XSAVE on boot cpu, cannot " 4739 "continue.", cpu->cpu_id); 4740 } else { 4741 /* 4742 * If we reached here on the boot CPU, it's also 4743 * almost certain that we'll reach here on the 4744 * non-boot CPUs. When we're here on a boot CPU 4745 * we should disable the feature, on a non-boot 4746 * CPU we need to confirm that we have. 4747 */ 4748 if (cpu->cpu_id == 0) { 4749 remove_x86_feature(x86_featureset, 4750 X86FSET_XSAVE); 4751 remove_x86_feature(x86_featureset, 4752 X86FSET_AVX); 4753 remove_x86_feature(x86_featureset, 4754 X86FSET_F16C); 4755 remove_x86_feature(x86_featureset, 4756 X86FSET_BMI1); 4757 remove_x86_feature(x86_featureset, 4758 X86FSET_BMI2); 4759 remove_x86_feature(x86_featureset, 4760 X86FSET_FMA); 4761 remove_x86_feature(x86_featureset, 4762 X86FSET_AVX2); 4763 remove_x86_feature(x86_featureset, 4764 X86FSET_MPX); 4765 remove_x86_feature(x86_featureset, 4766 X86FSET_AVX512F); 4767 remove_x86_feature(x86_featureset, 4768 X86FSET_AVX512DQ); 4769 remove_x86_feature(x86_featureset, 4770 X86FSET_AVX512PF); 4771 remove_x86_feature(x86_featureset, 4772 X86FSET_AVX512ER); 4773 remove_x86_feature(x86_featureset, 4774 X86FSET_AVX512CD); 4775 remove_x86_feature(x86_featureset, 4776 X86FSET_AVX512BW); 4777 remove_x86_feature(x86_featureset, 4778 X86FSET_AVX512VL); 4779 remove_x86_feature(x86_featureset, 4780 X86FSET_AVX512FMA); 4781 remove_x86_feature(x86_featureset, 4782 X86FSET_AVX512VBMI); 4783 remove_x86_feature(x86_featureset, 4784 X86FSET_AVX512VNNI); 4785 remove_x86_feature(x86_featureset, 4786 X86FSET_AVX512VPOPCDQ); 4787 remove_x86_feature(x86_featureset, 4788 X86FSET_AVX512NNIW); 4789 remove_x86_feature(x86_featureset, 4790 X86FSET_AVX512FMAPS); 4791 remove_x86_feature(x86_featureset, 4792 X86FSET_VAES); 4793 remove_x86_feature(x86_featureset, 4794 X86FSET_VPCLMULQDQ); 4795 remove_x86_feature(x86_featureset, 4796 X86FSET_GFNI); 4797 remove_x86_feature(x86_featureset, 4798 X86FSET_AVX512_VP2INT); 4799 remove_x86_feature(x86_featureset, 4800 X86FSET_AVX512_BITALG); 4801 remove_x86_feature(x86_featureset, 4802 X86FSET_AVX512_VBMI2); 4803 remove_x86_feature(x86_featureset, 4804 X86FSET_AVX512_BF16); 4805 4806 xsave_force_disable = B_TRUE; 4807 } else { 4808 VERIFY(is_x86_feature(x86_featureset, 4809 X86FSET_XSAVE) == B_FALSE); 4810 } 4811 } 4812 } 4813 } 4814 4815 4816 if ((cpi->cpi_xmaxeax & CPUID_LEAF_EXT_0) == 0) 4817 return; 4818 4819 if ((nmax = cpi->cpi_xmaxeax - CPUID_LEAF_EXT_0 + 1) > NMAX_CPI_EXTD) 4820 nmax = NMAX_CPI_EXTD; 4821 /* 4822 * Copy the extended properties, fixing them as we go. 4823 * (We already handled n == 0 and n == 1 in the basic pass) 4824 */ 4825 iptr = (void *)cpi->cpi_brandstr; 4826 for (n = 2, cp = &cpi->cpi_extd[2]; n < nmax; cp++, n++) { 4827 cp->cp_eax = CPUID_LEAF_EXT_0 + n; 4828 (void) __cpuid_insn(cp); 4829 platform_cpuid_mangle(cpi->cpi_vendor, CPUID_LEAF_EXT_0 + n, 4830 cp); 4831 switch (n) { 4832 case 2: 4833 case 3: 4834 case 4: 4835 /* 4836 * Extract the brand string 4837 */ 4838 *iptr++ = cp->cp_eax; 4839 *iptr++ = cp->cp_ebx; 4840 *iptr++ = cp->cp_ecx; 4841 *iptr++ = cp->cp_edx; 4842 break; 4843 case 5: 4844 switch (cpi->cpi_vendor) { 4845 case X86_VENDOR_AMD: 4846 /* 4847 * The Athlon and Duron were the first 4848 * parts to report the sizes of the 4849 * TLB for large pages. Before then, 4850 * we don't trust the data. 4851 */ 4852 if (cpi->cpi_family < 6 || 4853 (cpi->cpi_family == 6 && 4854 cpi->cpi_model < 1)) 4855 cp->cp_eax = 0; 4856 break; 4857 default: 4858 break; 4859 } 4860 break; 4861 case 6: 4862 switch (cpi->cpi_vendor) { 4863 case X86_VENDOR_AMD: 4864 /* 4865 * The Athlon and Duron were the first 4866 * AMD parts with L2 TLB's. 4867 * Before then, don't trust the data. 4868 */ 4869 if (cpi->cpi_family < 6 || 4870 (cpi->cpi_family == 6 && 4871 cpi->cpi_model < 1)) 4872 cp->cp_eax = cp->cp_ebx = 0; 4873 /* 4874 * AMD Duron rev A0 reports L2 4875 * cache size incorrectly as 1K 4876 * when it is really 64K 4877 */ 4878 if (cpi->cpi_family == 6 && 4879 cpi->cpi_model == 3 && 4880 cpi->cpi_step == 0) { 4881 cp->cp_ecx &= 0xffff; 4882 cp->cp_ecx |= 0x400000; 4883 } 4884 break; 4885 case X86_VENDOR_Cyrix: /* VIA C3 */ 4886 /* 4887 * VIA C3 processors are a bit messed 4888 * up w.r.t. encoding cache sizes in %ecx 4889 */ 4890 if (cpi->cpi_family != 6) 4891 break; 4892 /* 4893 * model 7 and 8 were incorrectly encoded 4894 * 4895 * xxx is model 8 really broken? 4896 */ 4897 if (cpi->cpi_model == 7 || 4898 cpi->cpi_model == 8) 4899 cp->cp_ecx = 4900 BITX(cp->cp_ecx, 31, 24) << 16 | 4901 BITX(cp->cp_ecx, 23, 16) << 12 | 4902 BITX(cp->cp_ecx, 15, 8) << 8 | 4903 BITX(cp->cp_ecx, 7, 0); 4904 /* 4905 * model 9 stepping 1 has wrong associativity 4906 */ 4907 if (cpi->cpi_model == 9 && cpi->cpi_step == 1) 4908 cp->cp_ecx |= 8 << 12; 4909 break; 4910 case X86_VENDOR_Intel: 4911 /* 4912 * Extended L2 Cache features function. 4913 * First appeared on Prescott. 4914 */ 4915 default: 4916 break; 4917 } 4918 break; 4919 default: 4920 break; 4921 } 4922 } 4923 } 4924 4925 static const char * 4926 intel_cpubrand(const struct cpuid_info *cpi) 4927 { 4928 int i; 4929 4930 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 4931 4932 switch (cpi->cpi_family) { 4933 case 5: 4934 return ("Intel Pentium(r)"); 4935 case 6: 4936 switch (cpi->cpi_model) { 4937 uint_t celeron, xeon; 4938 const struct cpuid_regs *cp; 4939 case 0: 4940 case 1: 4941 case 2: 4942 return ("Intel Pentium(r) Pro"); 4943 case 3: 4944 case 4: 4945 return ("Intel Pentium(r) II"); 4946 case 6: 4947 return ("Intel Celeron(r)"); 4948 case 5: 4949 case 7: 4950 celeron = xeon = 0; 4951 cp = &cpi->cpi_std[2]; /* cache info */ 4952 4953 for (i = 1; i < 4; i++) { 4954 uint_t tmp; 4955 4956 tmp = (cp->cp_eax >> (8 * i)) & 0xff; 4957 if (tmp == 0x40) 4958 celeron++; 4959 if (tmp >= 0x44 && tmp <= 0x45) 4960 xeon++; 4961 } 4962 4963 for (i = 0; i < 2; i++) { 4964 uint_t tmp; 4965 4966 tmp = (cp->cp_ebx >> (8 * i)) & 0xff; 4967 if (tmp == 0x40) 4968 celeron++; 4969 else if (tmp >= 0x44 && tmp <= 0x45) 4970 xeon++; 4971 } 4972 4973 for (i = 0; i < 4; i++) { 4974 uint_t tmp; 4975 4976 tmp = (cp->cp_ecx >> (8 * i)) & 0xff; 4977 if (tmp == 0x40) 4978 celeron++; 4979 else if (tmp >= 0x44 && tmp <= 0x45) 4980 xeon++; 4981 } 4982 4983 for (i = 0; i < 4; i++) { 4984 uint_t tmp; 4985 4986 tmp = (cp->cp_edx >> (8 * i)) & 0xff; 4987 if (tmp == 0x40) 4988 celeron++; 4989 else if (tmp >= 0x44 && tmp <= 0x45) 4990 xeon++; 4991 } 4992 4993 if (celeron) 4994 return ("Intel Celeron(r)"); 4995 if (xeon) 4996 return (cpi->cpi_model == 5 ? 4997 "Intel Pentium(r) II Xeon(tm)" : 4998 "Intel Pentium(r) III Xeon(tm)"); 4999 return (cpi->cpi_model == 5 ? 5000 "Intel Pentium(r) II or Pentium(r) II Xeon(tm)" : 5001 "Intel Pentium(r) III or Pentium(r) III Xeon(tm)"); 5002 default: 5003 break; 5004 } 5005 default: 5006 break; 5007 } 5008 5009 /* BrandID is present if the field is nonzero */ 5010 if (cpi->cpi_brandid != 0) { 5011 static const struct { 5012 uint_t bt_bid; 5013 const char *bt_str; 5014 } brand_tbl[] = { 5015 { 0x1, "Intel(r) Celeron(r)" }, 5016 { 0x2, "Intel(r) Pentium(r) III" }, 5017 { 0x3, "Intel(r) Pentium(r) III Xeon(tm)" }, 5018 { 0x4, "Intel(r) Pentium(r) III" }, 5019 { 0x6, "Mobile Intel(r) Pentium(r) III" }, 5020 { 0x7, "Mobile Intel(r) Celeron(r)" }, 5021 { 0x8, "Intel(r) Pentium(r) 4" }, 5022 { 0x9, "Intel(r) Pentium(r) 4" }, 5023 { 0xa, "Intel(r) Celeron(r)" }, 5024 { 0xb, "Intel(r) Xeon(tm)" }, 5025 { 0xc, "Intel(r) Xeon(tm) MP" }, 5026 { 0xe, "Mobile Intel(r) Pentium(r) 4" }, 5027 { 0xf, "Mobile Intel(r) Celeron(r)" }, 5028 { 0x11, "Mobile Genuine Intel(r)" }, 5029 { 0x12, "Intel(r) Celeron(r) M" }, 5030 { 0x13, "Mobile Intel(r) Celeron(r)" }, 5031 { 0x14, "Intel(r) Celeron(r)" }, 5032 { 0x15, "Mobile Genuine Intel(r)" }, 5033 { 0x16, "Intel(r) Pentium(r) M" }, 5034 { 0x17, "Mobile Intel(r) Celeron(r)" } 5035 }; 5036 uint_t btblmax = sizeof (brand_tbl) / sizeof (brand_tbl[0]); 5037 uint_t sgn; 5038 5039 sgn = (cpi->cpi_family << 8) | 5040 (cpi->cpi_model << 4) | cpi->cpi_step; 5041 5042 for (i = 0; i < btblmax; i++) 5043 if (brand_tbl[i].bt_bid == cpi->cpi_brandid) 5044 break; 5045 if (i < btblmax) { 5046 if (sgn == 0x6b1 && cpi->cpi_brandid == 3) 5047 return ("Intel(r) Celeron(r)"); 5048 if (sgn < 0xf13 && cpi->cpi_brandid == 0xb) 5049 return ("Intel(r) Xeon(tm) MP"); 5050 if (sgn < 0xf13 && cpi->cpi_brandid == 0xe) 5051 return ("Intel(r) Xeon(tm)"); 5052 return (brand_tbl[i].bt_str); 5053 } 5054 } 5055 5056 return (NULL); 5057 } 5058 5059 static const char * 5060 amd_cpubrand(const struct cpuid_info *cpi) 5061 { 5062 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 5063 5064 switch (cpi->cpi_family) { 5065 case 5: 5066 switch (cpi->cpi_model) { 5067 case 0: 5068 case 1: 5069 case 2: 5070 case 3: 5071 case 4: 5072 case 5: 5073 return ("AMD-K5(r)"); 5074 case 6: 5075 case 7: 5076 return ("AMD-K6(r)"); 5077 case 8: 5078 return ("AMD-K6(r)-2"); 5079 case 9: 5080 return ("AMD-K6(r)-III"); 5081 default: 5082 return ("AMD (family 5)"); 5083 } 5084 case 6: 5085 switch (cpi->cpi_model) { 5086 case 1: 5087 return ("AMD-K7(tm)"); 5088 case 0: 5089 case 2: 5090 case 4: 5091 return ("AMD Athlon(tm)"); 5092 case 3: 5093 case 7: 5094 return ("AMD Duron(tm)"); 5095 case 6: 5096 case 8: 5097 case 10: 5098 /* 5099 * Use the L2 cache size to distinguish 5100 */ 5101 return ((cpi->cpi_extd[6].cp_ecx >> 16) >= 256 ? 5102 "AMD Athlon(tm)" : "AMD Duron(tm)"); 5103 default: 5104 return ("AMD (family 6)"); 5105 } 5106 default: 5107 break; 5108 } 5109 5110 if (cpi->cpi_family == 0xf && cpi->cpi_model == 5 && 5111 cpi->cpi_brandid != 0) { 5112 switch (BITX(cpi->cpi_brandid, 7, 5)) { 5113 case 3: 5114 return ("AMD Opteron(tm) UP 1xx"); 5115 case 4: 5116 return ("AMD Opteron(tm) DP 2xx"); 5117 case 5: 5118 return ("AMD Opteron(tm) MP 8xx"); 5119 default: 5120 return ("AMD Opteron(tm)"); 5121 } 5122 } 5123 5124 return (NULL); 5125 } 5126 5127 static const char * 5128 cyrix_cpubrand(struct cpuid_info *cpi, uint_t type) 5129 { 5130 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 5131 5132 switch (type) { 5133 case X86_TYPE_CYRIX_6x86: 5134 return ("Cyrix 6x86"); 5135 case X86_TYPE_CYRIX_6x86L: 5136 return ("Cyrix 6x86L"); 5137 case X86_TYPE_CYRIX_6x86MX: 5138 return ("Cyrix 6x86MX"); 5139 case X86_TYPE_CYRIX_GXm: 5140 return ("Cyrix GXm"); 5141 case X86_TYPE_CYRIX_MediaGX: 5142 return ("Cyrix MediaGX"); 5143 case X86_TYPE_CYRIX_MII: 5144 return ("Cyrix M2"); 5145 case X86_TYPE_VIA_CYRIX_III: 5146 return ("VIA Cyrix M3"); 5147 default: 5148 /* 5149 * Have another wild guess .. 5150 */ 5151 if (cpi->cpi_family == 4 && cpi->cpi_model == 9) 5152 return ("Cyrix 5x86"); 5153 else if (cpi->cpi_family == 5) { 5154 switch (cpi->cpi_model) { 5155 case 2: 5156 return ("Cyrix 6x86"); /* Cyrix M1 */ 5157 case 4: 5158 return ("Cyrix MediaGX"); 5159 default: 5160 break; 5161 } 5162 } else if (cpi->cpi_family == 6) { 5163 switch (cpi->cpi_model) { 5164 case 0: 5165 return ("Cyrix 6x86MX"); /* Cyrix M2? */ 5166 case 5: 5167 case 6: 5168 case 7: 5169 case 8: 5170 case 9: 5171 return ("VIA C3"); 5172 default: 5173 break; 5174 } 5175 } 5176 break; 5177 } 5178 return (NULL); 5179 } 5180 5181 /* 5182 * This only gets called in the case that the CPU extended 5183 * feature brand string (0x80000002, 0x80000003, 0x80000004) 5184 * aren't available, or contain null bytes for some reason. 5185 */ 5186 static void 5187 fabricate_brandstr(struct cpuid_info *cpi) 5188 { 5189 const char *brand = NULL; 5190 5191 switch (cpi->cpi_vendor) { 5192 case X86_VENDOR_Intel: 5193 brand = intel_cpubrand(cpi); 5194 break; 5195 case X86_VENDOR_AMD: 5196 brand = amd_cpubrand(cpi); 5197 break; 5198 case X86_VENDOR_Cyrix: 5199 brand = cyrix_cpubrand(cpi, x86_type); 5200 break; 5201 case X86_VENDOR_NexGen: 5202 if (cpi->cpi_family == 5 && cpi->cpi_model == 0) 5203 brand = "NexGen Nx586"; 5204 break; 5205 case X86_VENDOR_Centaur: 5206 if (cpi->cpi_family == 5) 5207 switch (cpi->cpi_model) { 5208 case 4: 5209 brand = "Centaur C6"; 5210 break; 5211 case 8: 5212 brand = "Centaur C2"; 5213 break; 5214 case 9: 5215 brand = "Centaur C3"; 5216 break; 5217 default: 5218 break; 5219 } 5220 break; 5221 case X86_VENDOR_Rise: 5222 if (cpi->cpi_family == 5 && 5223 (cpi->cpi_model == 0 || cpi->cpi_model == 2)) 5224 brand = "Rise mP6"; 5225 break; 5226 case X86_VENDOR_SiS: 5227 if (cpi->cpi_family == 5 && cpi->cpi_model == 0) 5228 brand = "SiS 55x"; 5229 break; 5230 case X86_VENDOR_TM: 5231 if (cpi->cpi_family == 5 && cpi->cpi_model == 4) 5232 brand = "Transmeta Crusoe TM3x00 or TM5x00"; 5233 break; 5234 case X86_VENDOR_NSC: 5235 case X86_VENDOR_UMC: 5236 default: 5237 break; 5238 } 5239 if (brand) { 5240 (void) strcpy((char *)cpi->cpi_brandstr, brand); 5241 return; 5242 } 5243 5244 /* 5245 * If all else fails ... 5246 */ 5247 (void) snprintf(cpi->cpi_brandstr, sizeof (cpi->cpi_brandstr), 5248 "%s %d.%d.%d", cpi->cpi_vendorstr, cpi->cpi_family, 5249 cpi->cpi_model, cpi->cpi_step); 5250 } 5251 5252 /* 5253 * This routine is called just after kernel memory allocation 5254 * becomes available on cpu0, and as part of mp_startup() on 5255 * the other cpus. 5256 * 5257 * Fixup the brand string, and collect any information from cpuid 5258 * that requires dynamically allocated storage to represent. 5259 */ 5260 5261 static void 5262 cpuid_pass_dynamic(cpu_t *cpu, void *_arg __unused) 5263 { 5264 int i, max, shft, level, size; 5265 struct cpuid_regs regs; 5266 struct cpuid_regs *cp; 5267 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 5268 5269 /* 5270 * Deterministic cache parameters 5271 * 5272 * Intel uses leaf 0x4 for this, while AMD uses leaf 0x8000001d. The 5273 * values that are present are currently defined to be the same. This 5274 * means we can use the same logic to parse it as long as we use the 5275 * appropriate leaf to get the data. If you're updating this, make sure 5276 * you're careful about which vendor supports which aspect. 5277 * 5278 * Take this opportunity to detect the number of threads sharing the 5279 * last level cache, and construct a corresponding cache id. The 5280 * respective cpuid_info members are initialized to the default case of 5281 * "no last level cache sharing". 5282 */ 5283 cpi->cpi_ncpu_shr_last_cache = 1; 5284 cpi->cpi_last_lvl_cacheid = cpu->cpu_id; 5285 5286 if ((cpi->cpi_maxeax >= 4 && cpi->cpi_vendor == X86_VENDOR_Intel) || 5287 ((cpi->cpi_vendor == X86_VENDOR_AMD || 5288 cpi->cpi_vendor == X86_VENDOR_HYGON) && 5289 cpi->cpi_xmaxeax >= CPUID_LEAF_EXT_1d && 5290 is_x86_feature(x86_featureset, X86FSET_TOPOEXT))) { 5291 uint32_t leaf; 5292 5293 if (cpi->cpi_vendor == X86_VENDOR_Intel) { 5294 leaf = 4; 5295 } else { 5296 leaf = CPUID_LEAF_EXT_1d; 5297 } 5298 5299 /* 5300 * Find the # of elements (size) returned by the leaf and along 5301 * the way detect last level cache sharing details. 5302 */ 5303 bzero(®s, sizeof (regs)); 5304 cp = ®s; 5305 for (i = 0, max = 0; i < CPI_FN4_ECX_MAX; i++) { 5306 cp->cp_eax = leaf; 5307 cp->cp_ecx = i; 5308 5309 (void) __cpuid_insn(cp); 5310 5311 if (CPI_CACHE_TYPE(cp) == 0) 5312 break; 5313 level = CPI_CACHE_LVL(cp); 5314 if (level > max) { 5315 max = level; 5316 cpi->cpi_ncpu_shr_last_cache = 5317 CPI_NTHR_SHR_CACHE(cp) + 1; 5318 } 5319 } 5320 cpi->cpi_cache_leaf_size = size = i; 5321 5322 /* 5323 * Allocate the cpi_cache_leaves array. The first element 5324 * references the regs for the corresponding leaf with %ecx set 5325 * to 0. This was gathered in cpuid_pass_extended(). 5326 */ 5327 if (size > 0) { 5328 cpi->cpi_cache_leaves = 5329 kmem_alloc(size * sizeof (cp), KM_SLEEP); 5330 if (cpi->cpi_vendor == X86_VENDOR_Intel) { 5331 cpi->cpi_cache_leaves[0] = &cpi->cpi_std[4]; 5332 } else { 5333 cpi->cpi_cache_leaves[0] = &cpi->cpi_extd[0x1d]; 5334 } 5335 5336 /* 5337 * Allocate storage to hold the additional regs 5338 * for the leaf, %ecx == 1 .. cpi_cache_leaf_size. 5339 * 5340 * The regs for the leaf, %ecx == 0 has already 5341 * been allocated as indicated above. 5342 */ 5343 for (i = 1; i < size; i++) { 5344 cp = cpi->cpi_cache_leaves[i] = 5345 kmem_zalloc(sizeof (regs), KM_SLEEP); 5346 cp->cp_eax = leaf; 5347 cp->cp_ecx = i; 5348 5349 (void) __cpuid_insn(cp); 5350 } 5351 } 5352 /* 5353 * Determine the number of bits needed to represent 5354 * the number of CPUs sharing the last level cache. 5355 * 5356 * Shift off that number of bits from the APIC id to 5357 * derive the cache id. 5358 */ 5359 shft = 0; 5360 for (i = 1; i < cpi->cpi_ncpu_shr_last_cache; i <<= 1) 5361 shft++; 5362 cpi->cpi_last_lvl_cacheid = cpi->cpi_apicid >> shft; 5363 } 5364 5365 /* 5366 * Now fixup the brand string 5367 */ 5368 if ((cpi->cpi_xmaxeax & CPUID_LEAF_EXT_0) == 0) { 5369 fabricate_brandstr(cpi); 5370 } else { 5371 5372 /* 5373 * If we successfully extracted a brand string from the cpuid 5374 * instruction, clean it up by removing leading spaces and 5375 * similar junk. 5376 */ 5377 if (cpi->cpi_brandstr[0]) { 5378 size_t maxlen = sizeof (cpi->cpi_brandstr); 5379 char *src, *dst; 5380 5381 dst = src = (char *)cpi->cpi_brandstr; 5382 src[maxlen - 1] = '\0'; 5383 /* 5384 * strip leading spaces 5385 */ 5386 while (*src == ' ') 5387 src++; 5388 /* 5389 * Remove any 'Genuine' or "Authentic" prefixes 5390 */ 5391 if (strncmp(src, "Genuine ", 8) == 0) 5392 src += 8; 5393 if (strncmp(src, "Authentic ", 10) == 0) 5394 src += 10; 5395 5396 /* 5397 * Now do an in-place copy. 5398 * Map (R) to (r) and (TM) to (tm). 5399 * The era of teletypes is long gone, and there's 5400 * -really- no need to shout. 5401 */ 5402 while (*src != '\0') { 5403 if (src[0] == '(') { 5404 if (strncmp(src + 1, "R)", 2) == 0) { 5405 (void) strncpy(dst, "(r)", 3); 5406 src += 3; 5407 dst += 3; 5408 continue; 5409 } 5410 if (strncmp(src + 1, "TM)", 3) == 0) { 5411 (void) strncpy(dst, "(tm)", 4); 5412 src += 4; 5413 dst += 4; 5414 continue; 5415 } 5416 } 5417 *dst++ = *src++; 5418 } 5419 *dst = '\0'; 5420 5421 /* 5422 * Finally, remove any trailing spaces 5423 */ 5424 while (--dst > cpi->cpi_brandstr) 5425 if (*dst == ' ') 5426 *dst = '\0'; 5427 else 5428 break; 5429 } else 5430 fabricate_brandstr(cpi); 5431 } 5432 } 5433 5434 typedef struct { 5435 uint32_t avm_av; 5436 uint32_t avm_feat; 5437 } av_feat_map_t; 5438 5439 /* 5440 * These arrays are used to map features that we should add based on x86 5441 * features that are present. As a large number depend on kernel features, 5442 * rather than rechecking and clearing CPUID everywhere, we simply map these. 5443 * There is an array of these for each hwcap word. Some features aren't tracked 5444 * in the kernel x86 featureset and that's ok. They will not show up in here. 5445 */ 5446 static const av_feat_map_t x86fset_to_av1[] = { 5447 { AV_386_CX8, X86FSET_CX8 }, 5448 { AV_386_SEP, X86FSET_SEP }, 5449 { AV_386_AMD_SYSC, X86FSET_ASYSC }, 5450 { AV_386_CMOV, X86FSET_CMOV }, 5451 { AV_386_FXSR, X86FSET_SSE }, 5452 { AV_386_SSE, X86FSET_SSE }, 5453 { AV_386_SSE2, X86FSET_SSE2 }, 5454 { AV_386_SSE3, X86FSET_SSE3 }, 5455 { AV_386_CX16, X86FSET_CX16 }, 5456 { AV_386_TSCP, X86FSET_TSCP }, 5457 { AV_386_AMD_SSE4A, X86FSET_SSE4A }, 5458 { AV_386_SSSE3, X86FSET_SSSE3 }, 5459 { AV_386_SSE4_1, X86FSET_SSE4_1 }, 5460 { AV_386_SSE4_2, X86FSET_SSE4_2 }, 5461 { AV_386_AES, X86FSET_AES }, 5462 { AV_386_PCLMULQDQ, X86FSET_PCLMULQDQ }, 5463 { AV_386_XSAVE, X86FSET_XSAVE }, 5464 { AV_386_AVX, X86FSET_AVX }, 5465 { AV_386_VMX, X86FSET_VMX }, 5466 { AV_386_AMD_SVM, X86FSET_SVM } 5467 }; 5468 5469 static const av_feat_map_t x86fset_to_av2[] = { 5470 { AV_386_2_F16C, X86FSET_F16C }, 5471 { AV_386_2_RDRAND, X86FSET_RDRAND }, 5472 { AV_386_2_BMI1, X86FSET_BMI1 }, 5473 { AV_386_2_BMI2, X86FSET_BMI2 }, 5474 { AV_386_2_FMA, X86FSET_FMA }, 5475 { AV_386_2_AVX2, X86FSET_AVX2 }, 5476 { AV_386_2_ADX, X86FSET_ADX }, 5477 { AV_386_2_RDSEED, X86FSET_RDSEED }, 5478 { AV_386_2_AVX512F, X86FSET_AVX512F }, 5479 { AV_386_2_AVX512DQ, X86FSET_AVX512DQ }, 5480 { AV_386_2_AVX512IFMA, X86FSET_AVX512FMA }, 5481 { AV_386_2_AVX512PF, X86FSET_AVX512PF }, 5482 { AV_386_2_AVX512ER, X86FSET_AVX512ER }, 5483 { AV_386_2_AVX512CD, X86FSET_AVX512CD }, 5484 { AV_386_2_AVX512BW, X86FSET_AVX512BW }, 5485 { AV_386_2_AVX512VL, X86FSET_AVX512VL }, 5486 { AV_386_2_AVX512VBMI, X86FSET_AVX512VBMI }, 5487 { AV_386_2_AVX512VPOPCDQ, X86FSET_AVX512VPOPCDQ }, 5488 { AV_386_2_SHA, X86FSET_SHA }, 5489 { AV_386_2_FSGSBASE, X86FSET_FSGSBASE }, 5490 { AV_386_2_CLFLUSHOPT, X86FSET_CLFLUSHOPT }, 5491 { AV_386_2_CLWB, X86FSET_CLWB }, 5492 { AV_386_2_MONITORX, X86FSET_MONITORX }, 5493 { AV_386_2_CLZERO, X86FSET_CLZERO }, 5494 { AV_386_2_AVX512_VNNI, X86FSET_AVX512VNNI }, 5495 { AV_386_2_VPCLMULQDQ, X86FSET_VPCLMULQDQ }, 5496 { AV_386_2_VAES, X86FSET_VAES }, 5497 { AV_386_2_GFNI, X86FSET_GFNI }, 5498 { AV_386_2_AVX512_VP2INT, X86FSET_AVX512_VP2INT }, 5499 { AV_386_2_AVX512_BITALG, X86FSET_AVX512_BITALG } 5500 }; 5501 5502 static const av_feat_map_t x86fset_to_av3[] = { 5503 { AV_386_3_AVX512_VBMI2, X86FSET_AVX512_VBMI2 }, 5504 { AV_386_3_AVX512_BF16, X86FSET_AVX512_BF16 } 5505 }; 5506 5507 /* 5508 * This routine is called out of bind_hwcap() much later in the life 5509 * of the kernel (post_startup()). The job of this routine is to resolve 5510 * the hardware feature support and kernel support for those features into 5511 * what we're actually going to tell applications via the aux vector. 5512 * 5513 * Most of the aux vector is derived from the x86_featureset array vector where 5514 * a given feature indicates that an aux vector should be plumbed through. This 5515 * allows the kernel to use one tracking mechanism for these based on whether or 5516 * not it has the required hardware support (most often xsave). Most newer 5517 * features are added there in case we need them in the kernel. Otherwise, 5518 * features are evaluated based on looking at the cpuid features that remain. If 5519 * you find yourself wanting to clear out cpuid features for some reason, they 5520 * should instead be driven by the feature set so we have a consistent view. 5521 */ 5522 5523 static void 5524 cpuid_pass_resolve(cpu_t *cpu, void *arg) 5525 { 5526 uint_t *hwcap_out = (uint_t *)arg; 5527 struct cpuid_info *cpi; 5528 uint_t hwcap_flags = 0, hwcap_flags_2 = 0, hwcap_flags_3 = 0; 5529 5530 cpi = cpu->cpu_m.mcpu_cpi; 5531 5532 for (uint_t i = 0; i < ARRAY_SIZE(x86fset_to_av1); i++) { 5533 if (is_x86_feature(x86_featureset, 5534 x86fset_to_av1[i].avm_feat)) { 5535 hwcap_flags |= x86fset_to_av1[i].avm_av; 5536 } 5537 } 5538 5539 for (uint_t i = 0; i < ARRAY_SIZE(x86fset_to_av2); i++) { 5540 if (is_x86_feature(x86_featureset, 5541 x86fset_to_av2[i].avm_feat)) { 5542 hwcap_flags_2 |= x86fset_to_av2[i].avm_av; 5543 } 5544 } 5545 5546 for (uint_t i = 0; i < ARRAY_SIZE(x86fset_to_av3); i++) { 5547 if (is_x86_feature(x86_featureset, 5548 x86fset_to_av3[i].avm_feat)) { 5549 hwcap_flags_3 |= x86fset_to_av3[i].avm_av; 5550 } 5551 } 5552 5553 /* 5554 * From here on out we're working through features that don't have 5555 * corresponding kernel feature flags for various reasons that are 5556 * mostly just due to the historical implementation. 5557 */ 5558 if (cpi->cpi_maxeax >= 1) { 5559 uint32_t *edx = &cpi->cpi_support[STD_EDX_FEATURES]; 5560 uint32_t *ecx = &cpi->cpi_support[STD_ECX_FEATURES]; 5561 5562 *edx = CPI_FEATURES_EDX(cpi); 5563 *ecx = CPI_FEATURES_ECX(cpi); 5564 5565 /* 5566 * [no explicit support required beyond x87 fp context] 5567 */ 5568 if (!fpu_exists) 5569 *edx &= ~(CPUID_INTC_EDX_FPU | CPUID_INTC_EDX_MMX); 5570 5571 /* 5572 * Now map the supported feature vector to things that we 5573 * think userland will care about. 5574 */ 5575 if (*ecx & CPUID_INTC_ECX_MOVBE) 5576 hwcap_flags |= AV_386_MOVBE; 5577 5578 if (*ecx & CPUID_INTC_ECX_POPCNT) 5579 hwcap_flags |= AV_386_POPCNT; 5580 if (*edx & CPUID_INTC_EDX_FPU) 5581 hwcap_flags |= AV_386_FPU; 5582 if (*edx & CPUID_INTC_EDX_MMX) 5583 hwcap_flags |= AV_386_MMX; 5584 if (*edx & CPUID_INTC_EDX_TSC) 5585 hwcap_flags |= AV_386_TSC; 5586 } 5587 5588 /* 5589 * Check a few miscellaneous features. 5590 */ 5591 if (cpi->cpi_xmaxeax < 0x80000001) 5592 goto resolve_done; 5593 5594 switch (cpi->cpi_vendor) { 5595 uint32_t *edx, *ecx; 5596 5597 case X86_VENDOR_Intel: 5598 /* 5599 * Seems like Intel duplicated what we necessary 5600 * here to make the initial crop of 64-bit OS's work. 5601 * Hopefully, those are the only "extended" bits 5602 * they'll add. 5603 */ 5604 /*FALLTHROUGH*/ 5605 5606 case X86_VENDOR_AMD: 5607 case X86_VENDOR_HYGON: 5608 edx = &cpi->cpi_support[AMD_EDX_FEATURES]; 5609 ecx = &cpi->cpi_support[AMD_ECX_FEATURES]; 5610 5611 *edx = CPI_FEATURES_XTD_EDX(cpi); 5612 *ecx = CPI_FEATURES_XTD_ECX(cpi); 5613 5614 /* 5615 * [no explicit support required beyond 5616 * x87 fp context and exception handlers] 5617 */ 5618 if (!fpu_exists) 5619 *edx &= ~(CPUID_AMD_EDX_MMXamd | 5620 CPUID_AMD_EDX_3DNow | CPUID_AMD_EDX_3DNowx); 5621 5622 /* 5623 * Now map the supported feature vector to 5624 * things that we think userland will care about. 5625 */ 5626 if (*edx & CPUID_AMD_EDX_MMXamd) 5627 hwcap_flags |= AV_386_AMD_MMX; 5628 if (*edx & CPUID_AMD_EDX_3DNow) 5629 hwcap_flags |= AV_386_AMD_3DNow; 5630 if (*edx & CPUID_AMD_EDX_3DNowx) 5631 hwcap_flags |= AV_386_AMD_3DNowx; 5632 5633 switch (cpi->cpi_vendor) { 5634 case X86_VENDOR_AMD: 5635 case X86_VENDOR_HYGON: 5636 if (*ecx & CPUID_AMD_ECX_AHF64) 5637 hwcap_flags |= AV_386_AHF; 5638 if (*ecx & CPUID_AMD_ECX_LZCNT) 5639 hwcap_flags |= AV_386_AMD_LZCNT; 5640 break; 5641 5642 case X86_VENDOR_Intel: 5643 if (*ecx & CPUID_AMD_ECX_LZCNT) 5644 hwcap_flags |= AV_386_AMD_LZCNT; 5645 /* 5646 * Aarrgh. 5647 * Intel uses a different bit in the same word. 5648 */ 5649 if (*ecx & CPUID_INTC_ECX_AHF64) 5650 hwcap_flags |= AV_386_AHF; 5651 break; 5652 default: 5653 break; 5654 } 5655 break; 5656 5657 default: 5658 break; 5659 } 5660 5661 resolve_done: 5662 if (hwcap_out != NULL) { 5663 hwcap_out[0] = hwcap_flags; 5664 hwcap_out[1] = hwcap_flags_2; 5665 hwcap_out[2] = hwcap_flags_3; 5666 } 5667 } 5668 5669 5670 /* 5671 * Simulate the cpuid instruction using the data we previously 5672 * captured about this CPU. We try our best to return the truth 5673 * about the hardware, independently of kernel support. 5674 */ 5675 uint32_t 5676 cpuid_insn(cpu_t *cpu, struct cpuid_regs *cp) 5677 { 5678 struct cpuid_info *cpi; 5679 struct cpuid_regs *xcp; 5680 5681 if (cpu == NULL) 5682 cpu = CPU; 5683 cpi = cpu->cpu_m.mcpu_cpi; 5684 5685 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_DYNAMIC)); 5686 5687 /* 5688 * CPUID data is cached in two separate places: cpi_std for standard 5689 * CPUID leaves , and cpi_extd for extended CPUID leaves. 5690 */ 5691 if (cp->cp_eax <= cpi->cpi_maxeax && cp->cp_eax < NMAX_CPI_STD) { 5692 xcp = &cpi->cpi_std[cp->cp_eax]; 5693 } else if (cp->cp_eax >= CPUID_LEAF_EXT_0 && 5694 cp->cp_eax <= cpi->cpi_xmaxeax && 5695 cp->cp_eax < CPUID_LEAF_EXT_0 + NMAX_CPI_EXTD) { 5696 xcp = &cpi->cpi_extd[cp->cp_eax - CPUID_LEAF_EXT_0]; 5697 } else { 5698 /* 5699 * The caller is asking for data from an input parameter which 5700 * the kernel has not cached. In this case we go fetch from 5701 * the hardware and return the data directly to the user. 5702 */ 5703 return (__cpuid_insn(cp)); 5704 } 5705 5706 cp->cp_eax = xcp->cp_eax; 5707 cp->cp_ebx = xcp->cp_ebx; 5708 cp->cp_ecx = xcp->cp_ecx; 5709 cp->cp_edx = xcp->cp_edx; 5710 return (cp->cp_eax); 5711 } 5712 5713 boolean_t 5714 cpuid_checkpass(const cpu_t *const cpu, const cpuid_pass_t pass) 5715 { 5716 return (cpu != NULL && cpu->cpu_m.mcpu_cpi != NULL && 5717 cpu->cpu_m.mcpu_cpi->cpi_pass >= pass); 5718 } 5719 5720 int 5721 cpuid_getbrandstr(cpu_t *cpu, char *s, size_t n) 5722 { 5723 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_DYNAMIC)); 5724 5725 return (snprintf(s, n, "%s", cpu->cpu_m.mcpu_cpi->cpi_brandstr)); 5726 } 5727 5728 int 5729 cpuid_is_cmt(cpu_t *cpu) 5730 { 5731 if (cpu == NULL) 5732 cpu = CPU; 5733 5734 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5735 5736 return (cpu->cpu_m.mcpu_cpi->cpi_chipid >= 0); 5737 } 5738 5739 /* 5740 * AMD and Intel both implement the 64-bit variant of the syscall 5741 * instruction (syscallq), so if there's -any- support for syscall, 5742 * cpuid currently says "yes, we support this". 5743 * 5744 * However, Intel decided to -not- implement the 32-bit variant of the 5745 * syscall instruction, so we provide a predicate to allow our caller 5746 * to test that subtlety here. 5747 * 5748 * XXPV Currently, 32-bit syscall instructions don't work via the hypervisor, 5749 * even in the case where the hardware would in fact support it. 5750 */ 5751 /*ARGSUSED*/ 5752 int 5753 cpuid_syscall32_insn(cpu_t *cpu) 5754 { 5755 ASSERT(cpuid_checkpass((cpu == NULL ? CPU : cpu), CPUID_PASS_BASIC)); 5756 5757 #if !defined(__xpv) 5758 if (cpu == NULL) 5759 cpu = CPU; 5760 5761 /*CSTYLED*/ 5762 { 5763 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 5764 5765 if ((cpi->cpi_vendor == X86_VENDOR_AMD || 5766 cpi->cpi_vendor == X86_VENDOR_HYGON) && 5767 cpi->cpi_xmaxeax >= 0x80000001 && 5768 (CPI_FEATURES_XTD_EDX(cpi) & CPUID_AMD_EDX_SYSC)) 5769 return (1); 5770 } 5771 #endif 5772 return (0); 5773 } 5774 5775 int 5776 cpuid_getidstr(cpu_t *cpu, char *s, size_t n) 5777 { 5778 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 5779 5780 static const char fmt[] = 5781 "x86 (%s %X family %d model %d step %d clock %d MHz)"; 5782 static const char fmt_ht[] = 5783 "x86 (chipid 0x%x %s %X family %d model %d step %d clock %d MHz)"; 5784 5785 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5786 5787 if (cpuid_is_cmt(cpu)) 5788 return (snprintf(s, n, fmt_ht, cpi->cpi_chipid, 5789 cpi->cpi_vendorstr, cpi->cpi_std[1].cp_eax, 5790 cpi->cpi_family, cpi->cpi_model, 5791 cpi->cpi_step, cpu->cpu_type_info.pi_clock)); 5792 return (snprintf(s, n, fmt, 5793 cpi->cpi_vendorstr, cpi->cpi_std[1].cp_eax, 5794 cpi->cpi_family, cpi->cpi_model, 5795 cpi->cpi_step, cpu->cpu_type_info.pi_clock)); 5796 } 5797 5798 const char * 5799 cpuid_getvendorstr(cpu_t *cpu) 5800 { 5801 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5802 return ((const char *)cpu->cpu_m.mcpu_cpi->cpi_vendorstr); 5803 } 5804 5805 uint_t 5806 cpuid_getvendor(cpu_t *cpu) 5807 { 5808 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5809 return (cpu->cpu_m.mcpu_cpi->cpi_vendor); 5810 } 5811 5812 uint_t 5813 cpuid_getfamily(cpu_t *cpu) 5814 { 5815 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5816 return (cpu->cpu_m.mcpu_cpi->cpi_family); 5817 } 5818 5819 uint_t 5820 cpuid_getmodel(cpu_t *cpu) 5821 { 5822 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5823 return (cpu->cpu_m.mcpu_cpi->cpi_model); 5824 } 5825 5826 uint_t 5827 cpuid_get_ncpu_per_chip(cpu_t *cpu) 5828 { 5829 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5830 return (cpu->cpu_m.mcpu_cpi->cpi_ncpu_per_chip); 5831 } 5832 5833 uint_t 5834 cpuid_get_ncore_per_chip(cpu_t *cpu) 5835 { 5836 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5837 return (cpu->cpu_m.mcpu_cpi->cpi_ncore_per_chip); 5838 } 5839 5840 uint_t 5841 cpuid_get_ncpu_sharing_last_cache(cpu_t *cpu) 5842 { 5843 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_EXTENDED)); 5844 return (cpu->cpu_m.mcpu_cpi->cpi_ncpu_shr_last_cache); 5845 } 5846 5847 id_t 5848 cpuid_get_last_lvl_cacheid(cpu_t *cpu) 5849 { 5850 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_EXTENDED)); 5851 return (cpu->cpu_m.mcpu_cpi->cpi_last_lvl_cacheid); 5852 } 5853 5854 uint_t 5855 cpuid_getstep(cpu_t *cpu) 5856 { 5857 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5858 return (cpu->cpu_m.mcpu_cpi->cpi_step); 5859 } 5860 5861 uint_t 5862 cpuid_getsig(struct cpu *cpu) 5863 { 5864 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5865 return (cpu->cpu_m.mcpu_cpi->cpi_std[1].cp_eax); 5866 } 5867 5868 uint32_t 5869 cpuid_getchiprev(struct cpu *cpu) 5870 { 5871 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5872 return (cpu->cpu_m.mcpu_cpi->cpi_chiprev); 5873 } 5874 5875 const char * 5876 cpuid_getchiprevstr(struct cpu *cpu) 5877 { 5878 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5879 return (cpu->cpu_m.mcpu_cpi->cpi_chiprevstr); 5880 } 5881 5882 uint32_t 5883 cpuid_getsockettype(struct cpu *cpu) 5884 { 5885 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5886 return (cpu->cpu_m.mcpu_cpi->cpi_socket); 5887 } 5888 5889 const char * 5890 cpuid_getsocketstr(cpu_t *cpu) 5891 { 5892 static const char *socketstr = NULL; 5893 struct cpuid_info *cpi; 5894 5895 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_IDENT)); 5896 cpi = cpu->cpu_m.mcpu_cpi; 5897 5898 /* Assume that socket types are the same across the system */ 5899 if (socketstr == NULL) 5900 socketstr = _cpuid_sktstr(cpi->cpi_vendor, cpi->cpi_family, 5901 cpi->cpi_model, cpi->cpi_step); 5902 5903 5904 return (socketstr); 5905 } 5906 5907 x86_uarchrev_t 5908 cpuid_getuarchrev(cpu_t *cpu) 5909 { 5910 return (cpu->cpu_m.mcpu_cpi->cpi_uarchrev); 5911 } 5912 5913 int 5914 cpuid_get_chipid(cpu_t *cpu) 5915 { 5916 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5917 5918 if (cpuid_is_cmt(cpu)) 5919 return (cpu->cpu_m.mcpu_cpi->cpi_chipid); 5920 return (cpu->cpu_id); 5921 } 5922 5923 id_t 5924 cpuid_get_coreid(cpu_t *cpu) 5925 { 5926 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5927 return (cpu->cpu_m.mcpu_cpi->cpi_coreid); 5928 } 5929 5930 int 5931 cpuid_get_pkgcoreid(cpu_t *cpu) 5932 { 5933 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5934 return (cpu->cpu_m.mcpu_cpi->cpi_pkgcoreid); 5935 } 5936 5937 int 5938 cpuid_get_clogid(cpu_t *cpu) 5939 { 5940 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5941 return (cpu->cpu_m.mcpu_cpi->cpi_clogid); 5942 } 5943 5944 int 5945 cpuid_get_cacheid(cpu_t *cpu) 5946 { 5947 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5948 return (cpu->cpu_m.mcpu_cpi->cpi_last_lvl_cacheid); 5949 } 5950 5951 uint_t 5952 cpuid_get_procnodeid(cpu_t *cpu) 5953 { 5954 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5955 return (cpu->cpu_m.mcpu_cpi->cpi_procnodeid); 5956 } 5957 5958 uint_t 5959 cpuid_get_procnodes_per_pkg(cpu_t *cpu) 5960 { 5961 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5962 return (cpu->cpu_m.mcpu_cpi->cpi_procnodes_per_pkg); 5963 } 5964 5965 uint_t 5966 cpuid_get_compunitid(cpu_t *cpu) 5967 { 5968 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5969 return (cpu->cpu_m.mcpu_cpi->cpi_compunitid); 5970 } 5971 5972 uint_t 5973 cpuid_get_cores_per_compunit(cpu_t *cpu) 5974 { 5975 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5976 return (cpu->cpu_m.mcpu_cpi->cpi_cores_per_compunit); 5977 } 5978 5979 uint32_t 5980 cpuid_get_apicid(cpu_t *cpu) 5981 { 5982 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 5983 if (cpu->cpu_m.mcpu_cpi->cpi_maxeax < 1) { 5984 return (UINT32_MAX); 5985 } else { 5986 return (cpu->cpu_m.mcpu_cpi->cpi_apicid); 5987 } 5988 } 5989 5990 void 5991 cpuid_get_addrsize(cpu_t *cpu, uint_t *pabits, uint_t *vabits) 5992 { 5993 struct cpuid_info *cpi; 5994 5995 if (cpu == NULL) 5996 cpu = CPU; 5997 cpi = cpu->cpu_m.mcpu_cpi; 5998 5999 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 6000 6001 if (pabits) 6002 *pabits = cpi->cpi_pabits; 6003 if (vabits) 6004 *vabits = cpi->cpi_vabits; 6005 } 6006 6007 size_t 6008 cpuid_get_xsave_size() 6009 { 6010 return (MAX(cpuid_info0.cpi_xsave.xsav_max_size, 6011 sizeof (struct xsave_state))); 6012 } 6013 6014 /* 6015 * Return true if the CPUs on this system require 'pointer clearing' for the 6016 * floating point error pointer exception handling. In the past, this has been 6017 * true for all AMD K7 & K8 CPUs, although newer AMD CPUs have been changed to 6018 * behave the same as Intel. This is checked via the CPUID_AMD_EBX_ERR_PTR_ZERO 6019 * feature bit and is reflected in the cpi_fp_amd_save member. 6020 */ 6021 boolean_t 6022 cpuid_need_fp_excp_handling() 6023 { 6024 return (cpuid_info0.cpi_vendor == X86_VENDOR_AMD && 6025 cpuid_info0.cpi_fp_amd_save != 0); 6026 } 6027 6028 /* 6029 * Returns the number of data TLB entries for a corresponding 6030 * pagesize. If it can't be computed, or isn't known, the 6031 * routine returns zero. If you ask about an architecturally 6032 * impossible pagesize, the routine will panic (so that the 6033 * hat implementor knows that things are inconsistent.) 6034 */ 6035 uint_t 6036 cpuid_get_dtlb_nent(cpu_t *cpu, size_t pagesize) 6037 { 6038 struct cpuid_info *cpi; 6039 uint_t dtlb_nent = 0; 6040 6041 if (cpu == NULL) 6042 cpu = CPU; 6043 cpi = cpu->cpu_m.mcpu_cpi; 6044 6045 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 6046 6047 /* 6048 * Check the L2 TLB info 6049 */ 6050 if (cpi->cpi_xmaxeax >= 0x80000006) { 6051 struct cpuid_regs *cp = &cpi->cpi_extd[6]; 6052 6053 switch (pagesize) { 6054 6055 case 4 * 1024: 6056 /* 6057 * All zero in the top 16 bits of the register 6058 * indicates a unified TLB. Size is in low 16 bits. 6059 */ 6060 if ((cp->cp_ebx & 0xffff0000) == 0) 6061 dtlb_nent = cp->cp_ebx & 0x0000ffff; 6062 else 6063 dtlb_nent = BITX(cp->cp_ebx, 27, 16); 6064 break; 6065 6066 case 2 * 1024 * 1024: 6067 if ((cp->cp_eax & 0xffff0000) == 0) 6068 dtlb_nent = cp->cp_eax & 0x0000ffff; 6069 else 6070 dtlb_nent = BITX(cp->cp_eax, 27, 16); 6071 break; 6072 6073 default: 6074 panic("unknown L2 pagesize"); 6075 /*NOTREACHED*/ 6076 } 6077 } 6078 6079 if (dtlb_nent != 0) 6080 return (dtlb_nent); 6081 6082 /* 6083 * No L2 TLB support for this size, try L1. 6084 */ 6085 if (cpi->cpi_xmaxeax >= 0x80000005) { 6086 struct cpuid_regs *cp = &cpi->cpi_extd[5]; 6087 6088 switch (pagesize) { 6089 case 4 * 1024: 6090 dtlb_nent = BITX(cp->cp_ebx, 23, 16); 6091 break; 6092 case 2 * 1024 * 1024: 6093 dtlb_nent = BITX(cp->cp_eax, 23, 16); 6094 break; 6095 default: 6096 panic("unknown L1 d-TLB pagesize"); 6097 /*NOTREACHED*/ 6098 } 6099 } 6100 6101 return (dtlb_nent); 6102 } 6103 6104 /* 6105 * Return 0 if the erratum is not present or not applicable, positive 6106 * if it is, and negative if the status of the erratum is unknown. 6107 * 6108 * See "Revision Guide for AMD Athlon(tm) 64 and AMD Opteron(tm) 6109 * Processors" #25759, Rev 3.57, August 2005 6110 */ 6111 int 6112 cpuid_opteron_erratum(cpu_t *cpu, uint_t erratum) 6113 { 6114 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 6115 uint_t eax; 6116 6117 /* 6118 * Bail out if this CPU isn't an AMD CPU, or if it's 6119 * a legacy (32-bit) AMD CPU. 6120 */ 6121 if (cpi->cpi_vendor != X86_VENDOR_AMD || 6122 cpi->cpi_family == 4 || cpi->cpi_family == 5 || 6123 cpi->cpi_family == 6) { 6124 return (0); 6125 } 6126 6127 eax = cpi->cpi_std[1].cp_eax; 6128 6129 #define SH_B0(eax) (eax == 0xf40 || eax == 0xf50) 6130 #define SH_B3(eax) (eax == 0xf51) 6131 #define B(eax) (SH_B0(eax) || SH_B3(eax)) 6132 6133 #define SH_C0(eax) (eax == 0xf48 || eax == 0xf58) 6134 6135 #define SH_CG(eax) (eax == 0xf4a || eax == 0xf5a || eax == 0xf7a) 6136 #define DH_CG(eax) (eax == 0xfc0 || eax == 0xfe0 || eax == 0xff0) 6137 #define CH_CG(eax) (eax == 0xf82 || eax == 0xfb2) 6138 #define CG(eax) (SH_CG(eax) || DH_CG(eax) || CH_CG(eax)) 6139 6140 #define SH_D0(eax) (eax == 0x10f40 || eax == 0x10f50 || eax == 0x10f70) 6141 #define DH_D0(eax) (eax == 0x10fc0 || eax == 0x10ff0) 6142 #define CH_D0(eax) (eax == 0x10f80 || eax == 0x10fb0) 6143 #define D0(eax) (SH_D0(eax) || DH_D0(eax) || CH_D0(eax)) 6144 6145 #define SH_E0(eax) (eax == 0x20f50 || eax == 0x20f40 || eax == 0x20f70) 6146 #define JH_E1(eax) (eax == 0x20f10) /* JH8_E0 had 0x20f30 */ 6147 #define DH_E3(eax) (eax == 0x20fc0 || eax == 0x20ff0) 6148 #define SH_E4(eax) (eax == 0x20f51 || eax == 0x20f71) 6149 #define BH_E4(eax) (eax == 0x20fb1) 6150 #define SH_E5(eax) (eax == 0x20f42) 6151 #define DH_E6(eax) (eax == 0x20ff2 || eax == 0x20fc2) 6152 #define JH_E6(eax) (eax == 0x20f12 || eax == 0x20f32) 6153 #define EX(eax) (SH_E0(eax) || JH_E1(eax) || DH_E3(eax) || \ 6154 SH_E4(eax) || BH_E4(eax) || SH_E5(eax) || \ 6155 DH_E6(eax) || JH_E6(eax)) 6156 6157 #define DR_AX(eax) (eax == 0x100f00 || eax == 0x100f01 || eax == 0x100f02) 6158 #define DR_B0(eax) (eax == 0x100f20) 6159 #define DR_B1(eax) (eax == 0x100f21) 6160 #define DR_BA(eax) (eax == 0x100f2a) 6161 #define DR_B2(eax) (eax == 0x100f22) 6162 #define DR_B3(eax) (eax == 0x100f23) 6163 #define RB_C0(eax) (eax == 0x100f40) 6164 6165 switch (erratum) { 6166 case 1: 6167 return (cpi->cpi_family < 0x10); 6168 case 51: /* what does the asterisk mean? */ 6169 return (B(eax) || SH_C0(eax) || CG(eax)); 6170 case 52: 6171 return (B(eax)); 6172 case 57: 6173 return (cpi->cpi_family <= 0x11); 6174 case 58: 6175 return (B(eax)); 6176 case 60: 6177 return (cpi->cpi_family <= 0x11); 6178 case 61: 6179 case 62: 6180 case 63: 6181 case 64: 6182 case 65: 6183 case 66: 6184 case 68: 6185 case 69: 6186 case 70: 6187 case 71: 6188 return (B(eax)); 6189 case 72: 6190 return (SH_B0(eax)); 6191 case 74: 6192 return (B(eax)); 6193 case 75: 6194 return (cpi->cpi_family < 0x10); 6195 case 76: 6196 return (B(eax)); 6197 case 77: 6198 return (cpi->cpi_family <= 0x11); 6199 case 78: 6200 return (B(eax) || SH_C0(eax)); 6201 case 79: 6202 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax) || EX(eax)); 6203 case 80: 6204 case 81: 6205 case 82: 6206 return (B(eax)); 6207 case 83: 6208 return (B(eax) || SH_C0(eax) || CG(eax)); 6209 case 85: 6210 return (cpi->cpi_family < 0x10); 6211 case 86: 6212 return (SH_C0(eax) || CG(eax)); 6213 case 88: 6214 return (B(eax) || SH_C0(eax)); 6215 case 89: 6216 return (cpi->cpi_family < 0x10); 6217 case 90: 6218 return (B(eax) || SH_C0(eax) || CG(eax)); 6219 case 91: 6220 case 92: 6221 return (B(eax) || SH_C0(eax)); 6222 case 93: 6223 return (SH_C0(eax)); 6224 case 94: 6225 return (B(eax) || SH_C0(eax) || CG(eax)); 6226 case 95: 6227 return (B(eax) || SH_C0(eax)); 6228 case 96: 6229 return (B(eax) || SH_C0(eax) || CG(eax)); 6230 case 97: 6231 case 98: 6232 return (SH_C0(eax) || CG(eax)); 6233 case 99: 6234 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax)); 6235 case 100: 6236 return (B(eax) || SH_C0(eax)); 6237 case 101: 6238 case 103: 6239 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax)); 6240 case 104: 6241 return (SH_C0(eax) || CG(eax) || D0(eax)); 6242 case 105: 6243 case 106: 6244 case 107: 6245 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax)); 6246 case 108: 6247 return (DH_CG(eax)); 6248 case 109: 6249 return (SH_C0(eax) || CG(eax) || D0(eax)); 6250 case 110: 6251 return (D0(eax) || EX(eax)); 6252 case 111: 6253 return (CG(eax)); 6254 case 112: 6255 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax) || EX(eax)); 6256 case 113: 6257 return (eax == 0x20fc0); 6258 case 114: 6259 return (SH_E0(eax) || JH_E1(eax) || DH_E3(eax)); 6260 case 115: 6261 return (SH_E0(eax) || JH_E1(eax)); 6262 case 116: 6263 return (SH_E0(eax) || JH_E1(eax) || DH_E3(eax)); 6264 case 117: 6265 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax)); 6266 case 118: 6267 return (SH_E0(eax) || JH_E1(eax) || SH_E4(eax) || BH_E4(eax) || 6268 JH_E6(eax)); 6269 case 121: 6270 return (B(eax) || SH_C0(eax) || CG(eax) || D0(eax) || EX(eax)); 6271 case 122: 6272 return (cpi->cpi_family < 0x10 || cpi->cpi_family == 0x11); 6273 case 123: 6274 return (JH_E1(eax) || BH_E4(eax) || JH_E6(eax)); 6275 case 131: 6276 return (cpi->cpi_family < 0x10); 6277 case 6336786: 6278 6279 /* 6280 * Test for AdvPowerMgmtInfo.TscPStateInvariant 6281 * if this is a K8 family or newer processor. We're testing for 6282 * this 'erratum' to determine whether or not we have a constant 6283 * TSC. 6284 * 6285 * Our current fix for this is to disable the C1-Clock ramping. 6286 * However, this doesn't work on newer processor families nor 6287 * does it work when virtualized as those devices don't exist. 6288 */ 6289 if (cpi->cpi_family >= 0x12 || get_hwenv() != HW_NATIVE) { 6290 return (0); 6291 } 6292 6293 if (CPI_FAMILY(cpi) == 0xf) { 6294 struct cpuid_regs regs; 6295 regs.cp_eax = 0x80000007; 6296 (void) __cpuid_insn(®s); 6297 return (!(regs.cp_edx & 0x100)); 6298 } 6299 return (0); 6300 case 147: 6301 /* 6302 * This erratum (K8 #147) is not present on family 10 and newer. 6303 */ 6304 if (cpi->cpi_family >= 0x10) { 6305 return (0); 6306 } 6307 return (((((eax >> 12) & 0xff00) + (eax & 0xf00)) | 6308 (((eax >> 4) & 0xf) | ((eax >> 12) & 0xf0))) < 0xf40); 6309 6310 case 6671130: 6311 /* 6312 * check for processors (pre-Shanghai) that do not provide 6313 * optimal management of 1gb ptes in its tlb. 6314 */ 6315 return (cpi->cpi_family == 0x10 && cpi->cpi_model < 4); 6316 6317 case 298: 6318 return (DR_AX(eax) || DR_B0(eax) || DR_B1(eax) || DR_BA(eax) || 6319 DR_B2(eax) || RB_C0(eax)); 6320 6321 case 721: 6322 return (cpi->cpi_family == 0x10 || cpi->cpi_family == 0x12); 6323 6324 default: 6325 return (-1); 6326 6327 } 6328 } 6329 6330 /* 6331 * Determine if specified erratum is present via OSVW (OS Visible Workaround). 6332 * Return 1 if erratum is present, 0 if not present and -1 if indeterminate. 6333 */ 6334 int 6335 osvw_opteron_erratum(cpu_t *cpu, uint_t erratum) 6336 { 6337 struct cpuid_info *cpi; 6338 uint_t osvwid; 6339 static int osvwfeature = -1; 6340 uint64_t osvwlength; 6341 6342 6343 cpi = cpu->cpu_m.mcpu_cpi; 6344 6345 /* confirm OSVW supported */ 6346 if (osvwfeature == -1) { 6347 osvwfeature = cpi->cpi_extd[1].cp_ecx & CPUID_AMD_ECX_OSVW; 6348 } else { 6349 /* assert that osvw feature setting is consistent on all cpus */ 6350 ASSERT(osvwfeature == 6351 (cpi->cpi_extd[1].cp_ecx & CPUID_AMD_ECX_OSVW)); 6352 } 6353 if (!osvwfeature) 6354 return (-1); 6355 6356 osvwlength = rdmsr(MSR_AMD_OSVW_ID_LEN) & OSVW_ID_LEN_MASK; 6357 6358 switch (erratum) { 6359 case 298: /* osvwid is 0 */ 6360 osvwid = 0; 6361 if (osvwlength <= (uint64_t)osvwid) { 6362 /* osvwid 0 is unknown */ 6363 return (-1); 6364 } 6365 6366 /* 6367 * Check the OSVW STATUS MSR to determine the state 6368 * of the erratum where: 6369 * 0 - fixed by HW 6370 * 1 - BIOS has applied the workaround when BIOS 6371 * workaround is available. (Or for other errata, 6372 * OS workaround is required.) 6373 * For a value of 1, caller will confirm that the 6374 * erratum 298 workaround has indeed been applied by BIOS. 6375 * 6376 * A 1 may be set in cpus that have a HW fix 6377 * in a mixed cpu system. Regarding erratum 298: 6378 * In a multiprocessor platform, the workaround above 6379 * should be applied to all processors regardless of 6380 * silicon revision when an affected processor is 6381 * present. 6382 */ 6383 6384 return (rdmsr(MSR_AMD_OSVW_STATUS + 6385 (osvwid / OSVW_ID_CNT_PER_MSR)) & 6386 (1ULL << (osvwid % OSVW_ID_CNT_PER_MSR))); 6387 6388 default: 6389 return (-1); 6390 } 6391 } 6392 6393 static const char assoc_str[] = "associativity"; 6394 static const char line_str[] = "line-size"; 6395 static const char size_str[] = "size"; 6396 6397 static void 6398 add_cache_prop(dev_info_t *devi, const char *label, const char *type, 6399 uint32_t val) 6400 { 6401 char buf[128]; 6402 6403 /* 6404 * ndi_prop_update_int() is used because it is desirable for 6405 * DDI_PROP_HW_DEF and DDI_PROP_DONTSLEEP to be set. 6406 */ 6407 if (snprintf(buf, sizeof (buf), "%s-%s", label, type) < sizeof (buf)) 6408 (void) ndi_prop_update_int(DDI_DEV_T_NONE, devi, buf, val); 6409 } 6410 6411 /* 6412 * Intel-style cache/tlb description 6413 * 6414 * Standard cpuid level 2 gives a randomly ordered 6415 * selection of tags that index into a table that describes 6416 * cache and tlb properties. 6417 */ 6418 6419 static const char l1_icache_str[] = "l1-icache"; 6420 static const char l1_dcache_str[] = "l1-dcache"; 6421 static const char l2_cache_str[] = "l2-cache"; 6422 static const char l3_cache_str[] = "l3-cache"; 6423 static const char itlb4k_str[] = "itlb-4K"; 6424 static const char dtlb4k_str[] = "dtlb-4K"; 6425 static const char itlb2M_str[] = "itlb-2M"; 6426 static const char itlb4M_str[] = "itlb-4M"; 6427 static const char dtlb4M_str[] = "dtlb-4M"; 6428 static const char dtlb24_str[] = "dtlb0-2M-4M"; 6429 static const char itlb424_str[] = "itlb-4K-2M-4M"; 6430 static const char itlb24_str[] = "itlb-2M-4M"; 6431 static const char dtlb44_str[] = "dtlb-4K-4M"; 6432 static const char sl1_dcache_str[] = "sectored-l1-dcache"; 6433 static const char sl2_cache_str[] = "sectored-l2-cache"; 6434 static const char itrace_str[] = "itrace-cache"; 6435 static const char sl3_cache_str[] = "sectored-l3-cache"; 6436 static const char sh_l2_tlb4k_str[] = "shared-l2-tlb-4k"; 6437 6438 static const struct cachetab { 6439 uint8_t ct_code; 6440 uint8_t ct_assoc; 6441 uint16_t ct_line_size; 6442 size_t ct_size; 6443 const char *ct_label; 6444 } intel_ctab[] = { 6445 /* 6446 * maintain descending order! 6447 * 6448 * Codes ignored - Reason 6449 * ---------------------- 6450 * 40H - intel_cpuid_4_cache_info() disambiguates l2/l3 cache 6451 * f0H/f1H - Currently we do not interpret prefetch size by design 6452 */ 6453 { 0xe4, 16, 64, 8*1024*1024, l3_cache_str}, 6454 { 0xe3, 16, 64, 4*1024*1024, l3_cache_str}, 6455 { 0xe2, 16, 64, 2*1024*1024, l3_cache_str}, 6456 { 0xde, 12, 64, 6*1024*1024, l3_cache_str}, 6457 { 0xdd, 12, 64, 3*1024*1024, l3_cache_str}, 6458 { 0xdc, 12, 64, ((1*1024*1024)+(512*1024)), l3_cache_str}, 6459 { 0xd8, 8, 64, 4*1024*1024, l3_cache_str}, 6460 { 0xd7, 8, 64, 2*1024*1024, l3_cache_str}, 6461 { 0xd6, 8, 64, 1*1024*1024, l3_cache_str}, 6462 { 0xd2, 4, 64, 2*1024*1024, l3_cache_str}, 6463 { 0xd1, 4, 64, 1*1024*1024, l3_cache_str}, 6464 { 0xd0, 4, 64, 512*1024, l3_cache_str}, 6465 { 0xca, 4, 0, 512, sh_l2_tlb4k_str}, 6466 { 0xc0, 4, 0, 8, dtlb44_str }, 6467 { 0xba, 4, 0, 64, dtlb4k_str }, 6468 { 0xb4, 4, 0, 256, dtlb4k_str }, 6469 { 0xb3, 4, 0, 128, dtlb4k_str }, 6470 { 0xb2, 4, 0, 64, itlb4k_str }, 6471 { 0xb0, 4, 0, 128, itlb4k_str }, 6472 { 0x87, 8, 64, 1024*1024, l2_cache_str}, 6473 { 0x86, 4, 64, 512*1024, l2_cache_str}, 6474 { 0x85, 8, 32, 2*1024*1024, l2_cache_str}, 6475 { 0x84, 8, 32, 1024*1024, l2_cache_str}, 6476 { 0x83, 8, 32, 512*1024, l2_cache_str}, 6477 { 0x82, 8, 32, 256*1024, l2_cache_str}, 6478 { 0x80, 8, 64, 512*1024, l2_cache_str}, 6479 { 0x7f, 2, 64, 512*1024, l2_cache_str}, 6480 { 0x7d, 8, 64, 2*1024*1024, sl2_cache_str}, 6481 { 0x7c, 8, 64, 1024*1024, sl2_cache_str}, 6482 { 0x7b, 8, 64, 512*1024, sl2_cache_str}, 6483 { 0x7a, 8, 64, 256*1024, sl2_cache_str}, 6484 { 0x79, 8, 64, 128*1024, sl2_cache_str}, 6485 { 0x78, 8, 64, 1024*1024, l2_cache_str}, 6486 { 0x73, 8, 0, 64*1024, itrace_str}, 6487 { 0x72, 8, 0, 32*1024, itrace_str}, 6488 { 0x71, 8, 0, 16*1024, itrace_str}, 6489 { 0x70, 8, 0, 12*1024, itrace_str}, 6490 { 0x68, 4, 64, 32*1024, sl1_dcache_str}, 6491 { 0x67, 4, 64, 16*1024, sl1_dcache_str}, 6492 { 0x66, 4, 64, 8*1024, sl1_dcache_str}, 6493 { 0x60, 8, 64, 16*1024, sl1_dcache_str}, 6494 { 0x5d, 0, 0, 256, dtlb44_str}, 6495 { 0x5c, 0, 0, 128, dtlb44_str}, 6496 { 0x5b, 0, 0, 64, dtlb44_str}, 6497 { 0x5a, 4, 0, 32, dtlb24_str}, 6498 { 0x59, 0, 0, 16, dtlb4k_str}, 6499 { 0x57, 4, 0, 16, dtlb4k_str}, 6500 { 0x56, 4, 0, 16, dtlb4M_str}, 6501 { 0x55, 0, 0, 7, itlb24_str}, 6502 { 0x52, 0, 0, 256, itlb424_str}, 6503 { 0x51, 0, 0, 128, itlb424_str}, 6504 { 0x50, 0, 0, 64, itlb424_str}, 6505 { 0x4f, 0, 0, 32, itlb4k_str}, 6506 { 0x4e, 24, 64, 6*1024*1024, l2_cache_str}, 6507 { 0x4d, 16, 64, 16*1024*1024, l3_cache_str}, 6508 { 0x4c, 12, 64, 12*1024*1024, l3_cache_str}, 6509 { 0x4b, 16, 64, 8*1024*1024, l3_cache_str}, 6510 { 0x4a, 12, 64, 6*1024*1024, l3_cache_str}, 6511 { 0x49, 16, 64, 4*1024*1024, l3_cache_str}, 6512 { 0x48, 12, 64, 3*1024*1024, l2_cache_str}, 6513 { 0x47, 8, 64, 8*1024*1024, l3_cache_str}, 6514 { 0x46, 4, 64, 4*1024*1024, l3_cache_str}, 6515 { 0x45, 4, 32, 2*1024*1024, l2_cache_str}, 6516 { 0x44, 4, 32, 1024*1024, l2_cache_str}, 6517 { 0x43, 4, 32, 512*1024, l2_cache_str}, 6518 { 0x42, 4, 32, 256*1024, l2_cache_str}, 6519 { 0x41, 4, 32, 128*1024, l2_cache_str}, 6520 { 0x3e, 4, 64, 512*1024, sl2_cache_str}, 6521 { 0x3d, 6, 64, 384*1024, sl2_cache_str}, 6522 { 0x3c, 4, 64, 256*1024, sl2_cache_str}, 6523 { 0x3b, 2, 64, 128*1024, sl2_cache_str}, 6524 { 0x3a, 6, 64, 192*1024, sl2_cache_str}, 6525 { 0x39, 4, 64, 128*1024, sl2_cache_str}, 6526 { 0x30, 8, 64, 32*1024, l1_icache_str}, 6527 { 0x2c, 8, 64, 32*1024, l1_dcache_str}, 6528 { 0x29, 8, 64, 4096*1024, sl3_cache_str}, 6529 { 0x25, 8, 64, 2048*1024, sl3_cache_str}, 6530 { 0x23, 8, 64, 1024*1024, sl3_cache_str}, 6531 { 0x22, 4, 64, 512*1024, sl3_cache_str}, 6532 { 0x0e, 6, 64, 24*1024, l1_dcache_str}, 6533 { 0x0d, 4, 32, 16*1024, l1_dcache_str}, 6534 { 0x0c, 4, 32, 16*1024, l1_dcache_str}, 6535 { 0x0b, 4, 0, 4, itlb4M_str}, 6536 { 0x0a, 2, 32, 8*1024, l1_dcache_str}, 6537 { 0x08, 4, 32, 16*1024, l1_icache_str}, 6538 { 0x06, 4, 32, 8*1024, l1_icache_str}, 6539 { 0x05, 4, 0, 32, dtlb4M_str}, 6540 { 0x04, 4, 0, 8, dtlb4M_str}, 6541 { 0x03, 4, 0, 64, dtlb4k_str}, 6542 { 0x02, 4, 0, 2, itlb4M_str}, 6543 { 0x01, 4, 0, 32, itlb4k_str}, 6544 { 0 } 6545 }; 6546 6547 static const struct cachetab cyrix_ctab[] = { 6548 { 0x70, 4, 0, 32, "tlb-4K" }, 6549 { 0x80, 4, 16, 16*1024, "l1-cache" }, 6550 { 0 } 6551 }; 6552 6553 /* 6554 * Search a cache table for a matching entry 6555 */ 6556 static const struct cachetab * 6557 find_cacheent(const struct cachetab *ct, uint_t code) 6558 { 6559 if (code != 0) { 6560 for (; ct->ct_code != 0; ct++) 6561 if (ct->ct_code <= code) 6562 break; 6563 if (ct->ct_code == code) 6564 return (ct); 6565 } 6566 return (NULL); 6567 } 6568 6569 /* 6570 * Populate cachetab entry with L2 or L3 cache-information using 6571 * cpuid function 4. This function is called from intel_walk_cacheinfo() 6572 * when descriptor 0x49 is encountered. It returns 0 if no such cache 6573 * information is found. 6574 */ 6575 static int 6576 intel_cpuid_4_cache_info(struct cachetab *ct, struct cpuid_info *cpi) 6577 { 6578 uint32_t level, i; 6579 int ret = 0; 6580 6581 for (i = 0; i < cpi->cpi_cache_leaf_size; i++) { 6582 level = CPI_CACHE_LVL(cpi->cpi_cache_leaves[i]); 6583 6584 if (level == 2 || level == 3) { 6585 ct->ct_assoc = 6586 CPI_CACHE_WAYS(cpi->cpi_cache_leaves[i]) + 1; 6587 ct->ct_line_size = 6588 CPI_CACHE_COH_LN_SZ(cpi->cpi_cache_leaves[i]) + 1; 6589 ct->ct_size = ct->ct_assoc * 6590 (CPI_CACHE_PARTS(cpi->cpi_cache_leaves[i]) + 1) * 6591 ct->ct_line_size * 6592 (cpi->cpi_cache_leaves[i]->cp_ecx + 1); 6593 6594 if (level == 2) { 6595 ct->ct_label = l2_cache_str; 6596 } else if (level == 3) { 6597 ct->ct_label = l3_cache_str; 6598 } 6599 ret = 1; 6600 } 6601 } 6602 6603 return (ret); 6604 } 6605 6606 /* 6607 * Walk the cacheinfo descriptor, applying 'func' to every valid element 6608 * The walk is terminated if the walker returns non-zero. 6609 */ 6610 static void 6611 intel_walk_cacheinfo(struct cpuid_info *cpi, 6612 void *arg, int (*func)(void *, const struct cachetab *)) 6613 { 6614 const struct cachetab *ct; 6615 struct cachetab des_49_ct, des_b1_ct; 6616 uint8_t *dp; 6617 int i; 6618 6619 if ((dp = cpi->cpi_cacheinfo) == NULL) 6620 return; 6621 for (i = 0; i < cpi->cpi_ncache; i++, dp++) { 6622 /* 6623 * For overloaded descriptor 0x49 we use cpuid function 4 6624 * if supported by the current processor, to create 6625 * cache information. 6626 * For overloaded descriptor 0xb1 we use X86_PAE flag 6627 * to disambiguate the cache information. 6628 */ 6629 if (*dp == 0x49 && cpi->cpi_maxeax >= 0x4 && 6630 intel_cpuid_4_cache_info(&des_49_ct, cpi) == 1) { 6631 ct = &des_49_ct; 6632 } else if (*dp == 0xb1) { 6633 des_b1_ct.ct_code = 0xb1; 6634 des_b1_ct.ct_assoc = 4; 6635 des_b1_ct.ct_line_size = 0; 6636 if (is_x86_feature(x86_featureset, X86FSET_PAE)) { 6637 des_b1_ct.ct_size = 8; 6638 des_b1_ct.ct_label = itlb2M_str; 6639 } else { 6640 des_b1_ct.ct_size = 4; 6641 des_b1_ct.ct_label = itlb4M_str; 6642 } 6643 ct = &des_b1_ct; 6644 } else { 6645 if ((ct = find_cacheent(intel_ctab, *dp)) == NULL) { 6646 continue; 6647 } 6648 } 6649 6650 if (func(arg, ct) != 0) { 6651 break; 6652 } 6653 } 6654 } 6655 6656 /* 6657 * (Like the Intel one, except for Cyrix CPUs) 6658 */ 6659 static void 6660 cyrix_walk_cacheinfo(struct cpuid_info *cpi, 6661 void *arg, int (*func)(void *, const struct cachetab *)) 6662 { 6663 const struct cachetab *ct; 6664 uint8_t *dp; 6665 int i; 6666 6667 if ((dp = cpi->cpi_cacheinfo) == NULL) 6668 return; 6669 for (i = 0; i < cpi->cpi_ncache; i++, dp++) { 6670 /* 6671 * Search Cyrix-specific descriptor table first .. 6672 */ 6673 if ((ct = find_cacheent(cyrix_ctab, *dp)) != NULL) { 6674 if (func(arg, ct) != 0) 6675 break; 6676 continue; 6677 } 6678 /* 6679 * .. else fall back to the Intel one 6680 */ 6681 if ((ct = find_cacheent(intel_ctab, *dp)) != NULL) { 6682 if (func(arg, ct) != 0) 6683 break; 6684 continue; 6685 } 6686 } 6687 } 6688 6689 /* 6690 * A cacheinfo walker that adds associativity, line-size, and size properties 6691 * to the devinfo node it is passed as an argument. 6692 */ 6693 static int 6694 add_cacheent_props(void *arg, const struct cachetab *ct) 6695 { 6696 dev_info_t *devi = arg; 6697 6698 add_cache_prop(devi, ct->ct_label, assoc_str, ct->ct_assoc); 6699 if (ct->ct_line_size != 0) 6700 add_cache_prop(devi, ct->ct_label, line_str, 6701 ct->ct_line_size); 6702 add_cache_prop(devi, ct->ct_label, size_str, ct->ct_size); 6703 return (0); 6704 } 6705 6706 6707 static const char fully_assoc[] = "fully-associative?"; 6708 6709 /* 6710 * AMD style cache/tlb description 6711 * 6712 * Extended functions 5 and 6 directly describe properties of 6713 * tlbs and various cache levels. 6714 */ 6715 static void 6716 add_amd_assoc(dev_info_t *devi, const char *label, uint_t assoc) 6717 { 6718 switch (assoc) { 6719 case 0: /* reserved; ignore */ 6720 break; 6721 default: 6722 add_cache_prop(devi, label, assoc_str, assoc); 6723 break; 6724 case 0xff: 6725 add_cache_prop(devi, label, fully_assoc, 1); 6726 break; 6727 } 6728 } 6729 6730 static void 6731 add_amd_tlb(dev_info_t *devi, const char *label, uint_t assoc, uint_t size) 6732 { 6733 if (size == 0) 6734 return; 6735 add_cache_prop(devi, label, size_str, size); 6736 add_amd_assoc(devi, label, assoc); 6737 } 6738 6739 static void 6740 add_amd_cache(dev_info_t *devi, const char *label, 6741 uint_t size, uint_t assoc, uint_t lines_per_tag, uint_t line_size) 6742 { 6743 if (size == 0 || line_size == 0) 6744 return; 6745 add_amd_assoc(devi, label, assoc); 6746 /* 6747 * Most AMD parts have a sectored cache. Multiple cache lines are 6748 * associated with each tag. A sector consists of all cache lines 6749 * associated with a tag. For example, the AMD K6-III has a sector 6750 * size of 2 cache lines per tag. 6751 */ 6752 if (lines_per_tag != 0) 6753 add_cache_prop(devi, label, "lines-per-tag", lines_per_tag); 6754 add_cache_prop(devi, label, line_str, line_size); 6755 add_cache_prop(devi, label, size_str, size * 1024); 6756 } 6757 6758 static void 6759 add_amd_l2_assoc(dev_info_t *devi, const char *label, uint_t assoc) 6760 { 6761 switch (assoc) { 6762 case 0: /* off */ 6763 break; 6764 case 1: 6765 case 2: 6766 case 4: 6767 add_cache_prop(devi, label, assoc_str, assoc); 6768 break; 6769 case 6: 6770 add_cache_prop(devi, label, assoc_str, 8); 6771 break; 6772 case 8: 6773 add_cache_prop(devi, label, assoc_str, 16); 6774 break; 6775 case 0xf: 6776 add_cache_prop(devi, label, fully_assoc, 1); 6777 break; 6778 default: /* reserved; ignore */ 6779 break; 6780 } 6781 } 6782 6783 static void 6784 add_amd_l2_tlb(dev_info_t *devi, const char *label, uint_t assoc, uint_t size) 6785 { 6786 if (size == 0 || assoc == 0) 6787 return; 6788 add_amd_l2_assoc(devi, label, assoc); 6789 add_cache_prop(devi, label, size_str, size); 6790 } 6791 6792 static void 6793 add_amd_l2_cache(dev_info_t *devi, const char *label, 6794 uint_t size, uint_t assoc, uint_t lines_per_tag, uint_t line_size) 6795 { 6796 if (size == 0 || assoc == 0 || line_size == 0) 6797 return; 6798 add_amd_l2_assoc(devi, label, assoc); 6799 if (lines_per_tag != 0) 6800 add_cache_prop(devi, label, "lines-per-tag", lines_per_tag); 6801 add_cache_prop(devi, label, line_str, line_size); 6802 add_cache_prop(devi, label, size_str, size * 1024); 6803 } 6804 6805 static void 6806 amd_cache_info(struct cpuid_info *cpi, dev_info_t *devi) 6807 { 6808 struct cpuid_regs *cp; 6809 6810 if (cpi->cpi_xmaxeax < 0x80000005) 6811 return; 6812 cp = &cpi->cpi_extd[5]; 6813 6814 /* 6815 * 4M/2M L1 TLB configuration 6816 * 6817 * We report the size for 2M pages because AMD uses two 6818 * TLB entries for one 4M page. 6819 */ 6820 add_amd_tlb(devi, "dtlb-2M", 6821 BITX(cp->cp_eax, 31, 24), BITX(cp->cp_eax, 23, 16)); 6822 add_amd_tlb(devi, "itlb-2M", 6823 BITX(cp->cp_eax, 15, 8), BITX(cp->cp_eax, 7, 0)); 6824 6825 /* 6826 * 4K L1 TLB configuration 6827 */ 6828 6829 switch (cpi->cpi_vendor) { 6830 uint_t nentries; 6831 case X86_VENDOR_TM: 6832 if (cpi->cpi_family >= 5) { 6833 /* 6834 * Crusoe processors have 256 TLB entries, but 6835 * cpuid data format constrains them to only 6836 * reporting 255 of them. 6837 */ 6838 if ((nentries = BITX(cp->cp_ebx, 23, 16)) == 255) 6839 nentries = 256; 6840 /* 6841 * Crusoe processors also have a unified TLB 6842 */ 6843 add_amd_tlb(devi, "tlb-4K", BITX(cp->cp_ebx, 31, 24), 6844 nentries); 6845 break; 6846 } 6847 /*FALLTHROUGH*/ 6848 default: 6849 add_amd_tlb(devi, itlb4k_str, 6850 BITX(cp->cp_ebx, 31, 24), BITX(cp->cp_ebx, 23, 16)); 6851 add_amd_tlb(devi, dtlb4k_str, 6852 BITX(cp->cp_ebx, 15, 8), BITX(cp->cp_ebx, 7, 0)); 6853 break; 6854 } 6855 6856 /* 6857 * data L1 cache configuration 6858 */ 6859 6860 add_amd_cache(devi, l1_dcache_str, 6861 BITX(cp->cp_ecx, 31, 24), BITX(cp->cp_ecx, 23, 16), 6862 BITX(cp->cp_ecx, 15, 8), BITX(cp->cp_ecx, 7, 0)); 6863 6864 /* 6865 * code L1 cache configuration 6866 */ 6867 6868 add_amd_cache(devi, l1_icache_str, 6869 BITX(cp->cp_edx, 31, 24), BITX(cp->cp_edx, 23, 16), 6870 BITX(cp->cp_edx, 15, 8), BITX(cp->cp_edx, 7, 0)); 6871 6872 if (cpi->cpi_xmaxeax < 0x80000006) 6873 return; 6874 cp = &cpi->cpi_extd[6]; 6875 6876 /* Check for a unified L2 TLB for large pages */ 6877 6878 if (BITX(cp->cp_eax, 31, 16) == 0) 6879 add_amd_l2_tlb(devi, "l2-tlb-2M", 6880 BITX(cp->cp_eax, 15, 12), BITX(cp->cp_eax, 11, 0)); 6881 else { 6882 add_amd_l2_tlb(devi, "l2-dtlb-2M", 6883 BITX(cp->cp_eax, 31, 28), BITX(cp->cp_eax, 27, 16)); 6884 add_amd_l2_tlb(devi, "l2-itlb-2M", 6885 BITX(cp->cp_eax, 15, 12), BITX(cp->cp_eax, 11, 0)); 6886 } 6887 6888 /* Check for a unified L2 TLB for 4K pages */ 6889 6890 if (BITX(cp->cp_ebx, 31, 16) == 0) { 6891 add_amd_l2_tlb(devi, "l2-tlb-4K", 6892 BITX(cp->cp_eax, 15, 12), BITX(cp->cp_eax, 11, 0)); 6893 } else { 6894 add_amd_l2_tlb(devi, "l2-dtlb-4K", 6895 BITX(cp->cp_eax, 31, 28), BITX(cp->cp_eax, 27, 16)); 6896 add_amd_l2_tlb(devi, "l2-itlb-4K", 6897 BITX(cp->cp_eax, 15, 12), BITX(cp->cp_eax, 11, 0)); 6898 } 6899 6900 add_amd_l2_cache(devi, l2_cache_str, 6901 BITX(cp->cp_ecx, 31, 16), BITX(cp->cp_ecx, 15, 12), 6902 BITX(cp->cp_ecx, 11, 8), BITX(cp->cp_ecx, 7, 0)); 6903 } 6904 6905 /* 6906 * There are two basic ways that the x86 world describes it cache 6907 * and tlb architecture - Intel's way and AMD's way. 6908 * 6909 * Return which flavor of cache architecture we should use 6910 */ 6911 static int 6912 x86_which_cacheinfo(struct cpuid_info *cpi) 6913 { 6914 switch (cpi->cpi_vendor) { 6915 case X86_VENDOR_Intel: 6916 if (cpi->cpi_maxeax >= 2) 6917 return (X86_VENDOR_Intel); 6918 break; 6919 case X86_VENDOR_AMD: 6920 /* 6921 * The K5 model 1 was the first part from AMD that reported 6922 * cache sizes via extended cpuid functions. 6923 */ 6924 if (cpi->cpi_family > 5 || 6925 (cpi->cpi_family == 5 && cpi->cpi_model >= 1)) 6926 return (X86_VENDOR_AMD); 6927 break; 6928 case X86_VENDOR_HYGON: 6929 return (X86_VENDOR_AMD); 6930 case X86_VENDOR_TM: 6931 if (cpi->cpi_family >= 5) 6932 return (X86_VENDOR_AMD); 6933 /*FALLTHROUGH*/ 6934 default: 6935 /* 6936 * If they have extended CPU data for 0x80000005 6937 * then we assume they have AMD-format cache 6938 * information. 6939 * 6940 * If not, and the vendor happens to be Cyrix, 6941 * then try our-Cyrix specific handler. 6942 * 6943 * If we're not Cyrix, then assume we're using Intel's 6944 * table-driven format instead. 6945 */ 6946 if (cpi->cpi_xmaxeax >= 0x80000005) 6947 return (X86_VENDOR_AMD); 6948 else if (cpi->cpi_vendor == X86_VENDOR_Cyrix) 6949 return (X86_VENDOR_Cyrix); 6950 else if (cpi->cpi_maxeax >= 2) 6951 return (X86_VENDOR_Intel); 6952 break; 6953 } 6954 return (-1); 6955 } 6956 6957 void 6958 cpuid_set_cpu_properties(void *dip, processorid_t cpu_id, 6959 struct cpuid_info *cpi) 6960 { 6961 dev_info_t *cpu_devi; 6962 int create; 6963 6964 cpu_devi = (dev_info_t *)dip; 6965 6966 /* device_type */ 6967 (void) ndi_prop_update_string(DDI_DEV_T_NONE, cpu_devi, 6968 "device_type", "cpu"); 6969 6970 /* reg */ 6971 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 6972 "reg", cpu_id); 6973 6974 /* cpu-mhz, and clock-frequency */ 6975 if (cpu_freq > 0) { 6976 long long mul; 6977 6978 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 6979 "cpu-mhz", cpu_freq); 6980 if ((mul = cpu_freq * 1000000LL) <= INT_MAX) 6981 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 6982 "clock-frequency", (int)mul); 6983 } 6984 6985 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 6986 6987 /* vendor-id */ 6988 (void) ndi_prop_update_string(DDI_DEV_T_NONE, cpu_devi, 6989 "vendor-id", cpi->cpi_vendorstr); 6990 6991 if (cpi->cpi_maxeax == 0) { 6992 return; 6993 } 6994 6995 /* 6996 * family, model, and step 6997 */ 6998 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 6999 "family", CPI_FAMILY(cpi)); 7000 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7001 "cpu-model", CPI_MODEL(cpi)); 7002 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7003 "stepping-id", CPI_STEP(cpi)); 7004 7005 /* type */ 7006 switch (cpi->cpi_vendor) { 7007 case X86_VENDOR_Intel: 7008 create = 1; 7009 break; 7010 default: 7011 create = 0; 7012 break; 7013 } 7014 if (create) 7015 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7016 "type", CPI_TYPE(cpi)); 7017 7018 /* ext-family */ 7019 switch (cpi->cpi_vendor) { 7020 case X86_VENDOR_Intel: 7021 case X86_VENDOR_AMD: 7022 create = cpi->cpi_family >= 0xf; 7023 break; 7024 case X86_VENDOR_HYGON: 7025 create = 1; 7026 break; 7027 default: 7028 create = 0; 7029 break; 7030 } 7031 if (create) 7032 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7033 "ext-family", CPI_FAMILY_XTD(cpi)); 7034 7035 /* ext-model */ 7036 switch (cpi->cpi_vendor) { 7037 case X86_VENDOR_Intel: 7038 create = IS_EXTENDED_MODEL_INTEL(cpi); 7039 break; 7040 case X86_VENDOR_AMD: 7041 create = CPI_FAMILY(cpi) == 0xf; 7042 break; 7043 case X86_VENDOR_HYGON: 7044 create = 1; 7045 break; 7046 default: 7047 create = 0; 7048 break; 7049 } 7050 if (create) 7051 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7052 "ext-model", CPI_MODEL_XTD(cpi)); 7053 7054 /* generation */ 7055 switch (cpi->cpi_vendor) { 7056 case X86_VENDOR_AMD: 7057 case X86_VENDOR_HYGON: 7058 /* 7059 * AMD K5 model 1 was the first part to support this 7060 */ 7061 create = cpi->cpi_xmaxeax >= 0x80000001; 7062 break; 7063 default: 7064 create = 0; 7065 break; 7066 } 7067 if (create) 7068 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7069 "generation", BITX((cpi)->cpi_extd[1].cp_eax, 11, 8)); 7070 7071 /* brand-id */ 7072 switch (cpi->cpi_vendor) { 7073 case X86_VENDOR_Intel: 7074 /* 7075 * brand id first appeared on Pentium III Xeon model 8, 7076 * and Celeron model 8 processors and Opteron 7077 */ 7078 create = cpi->cpi_family > 6 || 7079 (cpi->cpi_family == 6 && cpi->cpi_model >= 8); 7080 break; 7081 case X86_VENDOR_AMD: 7082 create = cpi->cpi_family >= 0xf; 7083 break; 7084 case X86_VENDOR_HYGON: 7085 create = 1; 7086 break; 7087 default: 7088 create = 0; 7089 break; 7090 } 7091 if (create && cpi->cpi_brandid != 0) { 7092 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7093 "brand-id", cpi->cpi_brandid); 7094 } 7095 7096 /* chunks, and apic-id */ 7097 switch (cpi->cpi_vendor) { 7098 /* 7099 * first available on Pentium IV and Opteron (K8) 7100 */ 7101 case X86_VENDOR_Intel: 7102 create = IS_NEW_F6(cpi) || cpi->cpi_family >= 0xf; 7103 break; 7104 case X86_VENDOR_AMD: 7105 create = cpi->cpi_family >= 0xf; 7106 break; 7107 case X86_VENDOR_HYGON: 7108 create = 1; 7109 break; 7110 default: 7111 create = 0; 7112 break; 7113 } 7114 if (create) { 7115 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7116 "chunks", CPI_CHUNKS(cpi)); 7117 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7118 "apic-id", cpi->cpi_apicid); 7119 if (cpi->cpi_chipid >= 0) { 7120 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7121 "chip#", cpi->cpi_chipid); 7122 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7123 "clog#", cpi->cpi_clogid); 7124 } 7125 } 7126 7127 /* cpuid-features */ 7128 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7129 "cpuid-features", CPI_FEATURES_EDX(cpi)); 7130 7131 7132 /* cpuid-features-ecx */ 7133 switch (cpi->cpi_vendor) { 7134 case X86_VENDOR_Intel: 7135 create = IS_NEW_F6(cpi) || cpi->cpi_family >= 0xf; 7136 break; 7137 case X86_VENDOR_AMD: 7138 create = cpi->cpi_family >= 0xf; 7139 break; 7140 case X86_VENDOR_HYGON: 7141 create = 1; 7142 break; 7143 default: 7144 create = 0; 7145 break; 7146 } 7147 if (create) 7148 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7149 "cpuid-features-ecx", CPI_FEATURES_ECX(cpi)); 7150 7151 /* ext-cpuid-features */ 7152 switch (cpi->cpi_vendor) { 7153 case X86_VENDOR_Intel: 7154 case X86_VENDOR_AMD: 7155 case X86_VENDOR_HYGON: 7156 case X86_VENDOR_Cyrix: 7157 case X86_VENDOR_TM: 7158 case X86_VENDOR_Centaur: 7159 create = cpi->cpi_xmaxeax >= 0x80000001; 7160 break; 7161 default: 7162 create = 0; 7163 break; 7164 } 7165 if (create) { 7166 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7167 "ext-cpuid-features", CPI_FEATURES_XTD_EDX(cpi)); 7168 (void) ndi_prop_update_int(DDI_DEV_T_NONE, cpu_devi, 7169 "ext-cpuid-features-ecx", CPI_FEATURES_XTD_ECX(cpi)); 7170 } 7171 7172 /* 7173 * Brand String first appeared in Intel Pentium IV, AMD K5 7174 * model 1, and Cyrix GXm. On earlier models we try and 7175 * simulate something similar .. so this string should always 7176 * same -something- about the processor, however lame. 7177 */ 7178 (void) ndi_prop_update_string(DDI_DEV_T_NONE, cpu_devi, 7179 "brand-string", cpi->cpi_brandstr); 7180 7181 /* 7182 * Finally, cache and tlb information 7183 */ 7184 switch (x86_which_cacheinfo(cpi)) { 7185 case X86_VENDOR_Intel: 7186 intel_walk_cacheinfo(cpi, cpu_devi, add_cacheent_props); 7187 break; 7188 case X86_VENDOR_Cyrix: 7189 cyrix_walk_cacheinfo(cpi, cpu_devi, add_cacheent_props); 7190 break; 7191 case X86_VENDOR_AMD: 7192 amd_cache_info(cpi, cpu_devi); 7193 break; 7194 default: 7195 break; 7196 } 7197 } 7198 7199 struct l2info { 7200 int *l2i_csz; 7201 int *l2i_lsz; 7202 int *l2i_assoc; 7203 int l2i_ret; 7204 }; 7205 7206 /* 7207 * A cacheinfo walker that fetches the size, line-size and associativity 7208 * of the L2 cache 7209 */ 7210 static int 7211 intel_l2cinfo(void *arg, const struct cachetab *ct) 7212 { 7213 struct l2info *l2i = arg; 7214 int *ip; 7215 7216 if (ct->ct_label != l2_cache_str && 7217 ct->ct_label != sl2_cache_str) 7218 return (0); /* not an L2 -- keep walking */ 7219 7220 if ((ip = l2i->l2i_csz) != NULL) 7221 *ip = ct->ct_size; 7222 if ((ip = l2i->l2i_lsz) != NULL) 7223 *ip = ct->ct_line_size; 7224 if ((ip = l2i->l2i_assoc) != NULL) 7225 *ip = ct->ct_assoc; 7226 l2i->l2i_ret = ct->ct_size; 7227 return (1); /* was an L2 -- terminate walk */ 7228 } 7229 7230 /* 7231 * AMD L2/L3 Cache and TLB Associativity Field Definition: 7232 * 7233 * Unlike the associativity for the L1 cache and tlb where the 8 bit 7234 * value is the associativity, the associativity for the L2 cache and 7235 * tlb is encoded in the following table. The 4 bit L2 value serves as 7236 * an index into the amd_afd[] array to determine the associativity. 7237 * -1 is undefined. 0 is fully associative. 7238 */ 7239 7240 static int amd_afd[] = 7241 {-1, 1, 2, -1, 4, -1, 8, -1, 16, -1, 32, 48, 64, 96, 128, 0}; 7242 7243 static void 7244 amd_l2cacheinfo(struct cpuid_info *cpi, struct l2info *l2i) 7245 { 7246 struct cpuid_regs *cp; 7247 uint_t size, assoc; 7248 int i; 7249 int *ip; 7250 7251 if (cpi->cpi_xmaxeax < 0x80000006) 7252 return; 7253 cp = &cpi->cpi_extd[6]; 7254 7255 if ((i = BITX(cp->cp_ecx, 15, 12)) != 0 && 7256 (size = BITX(cp->cp_ecx, 31, 16)) != 0) { 7257 uint_t cachesz = size * 1024; 7258 assoc = amd_afd[i]; 7259 7260 ASSERT(assoc != -1); 7261 7262 if ((ip = l2i->l2i_csz) != NULL) 7263 *ip = cachesz; 7264 if ((ip = l2i->l2i_lsz) != NULL) 7265 *ip = BITX(cp->cp_ecx, 7, 0); 7266 if ((ip = l2i->l2i_assoc) != NULL) 7267 *ip = assoc; 7268 l2i->l2i_ret = cachesz; 7269 } 7270 } 7271 7272 int 7273 getl2cacheinfo(cpu_t *cpu, int *csz, int *lsz, int *assoc) 7274 { 7275 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 7276 struct l2info __l2info, *l2i = &__l2info; 7277 7278 l2i->l2i_csz = csz; 7279 l2i->l2i_lsz = lsz; 7280 l2i->l2i_assoc = assoc; 7281 l2i->l2i_ret = -1; 7282 7283 switch (x86_which_cacheinfo(cpi)) { 7284 case X86_VENDOR_Intel: 7285 intel_walk_cacheinfo(cpi, l2i, intel_l2cinfo); 7286 break; 7287 case X86_VENDOR_Cyrix: 7288 cyrix_walk_cacheinfo(cpi, l2i, intel_l2cinfo); 7289 break; 7290 case X86_VENDOR_AMD: 7291 amd_l2cacheinfo(cpi, l2i); 7292 break; 7293 default: 7294 break; 7295 } 7296 return (l2i->l2i_ret); 7297 } 7298 7299 #if !defined(__xpv) 7300 7301 uint32_t * 7302 cpuid_mwait_alloc(cpu_t *cpu) 7303 { 7304 uint32_t *ret; 7305 size_t mwait_size; 7306 7307 ASSERT(cpuid_checkpass(CPU, CPUID_PASS_EXTENDED)); 7308 7309 mwait_size = CPU->cpu_m.mcpu_cpi->cpi_mwait.mon_max; 7310 if (mwait_size == 0) 7311 return (NULL); 7312 7313 /* 7314 * kmem_alloc() returns cache line size aligned data for mwait_size 7315 * allocations. mwait_size is currently cache line sized. Neither 7316 * of these implementation details are guarantied to be true in the 7317 * future. 7318 * 7319 * First try allocating mwait_size as kmem_alloc() currently returns 7320 * correctly aligned memory. If kmem_alloc() does not return 7321 * mwait_size aligned memory, then use mwait_size ROUNDUP. 7322 * 7323 * Set cpi_mwait.buf_actual and cpi_mwait.size_actual in case we 7324 * decide to free this memory. 7325 */ 7326 ret = kmem_zalloc(mwait_size, KM_SLEEP); 7327 if (ret == (uint32_t *)P2ROUNDUP((uintptr_t)ret, mwait_size)) { 7328 cpu->cpu_m.mcpu_cpi->cpi_mwait.buf_actual = ret; 7329 cpu->cpu_m.mcpu_cpi->cpi_mwait.size_actual = mwait_size; 7330 *ret = MWAIT_RUNNING; 7331 return (ret); 7332 } else { 7333 kmem_free(ret, mwait_size); 7334 ret = kmem_zalloc(mwait_size * 2, KM_SLEEP); 7335 cpu->cpu_m.mcpu_cpi->cpi_mwait.buf_actual = ret; 7336 cpu->cpu_m.mcpu_cpi->cpi_mwait.size_actual = mwait_size * 2; 7337 ret = (uint32_t *)P2ROUNDUP((uintptr_t)ret, mwait_size); 7338 *ret = MWAIT_RUNNING; 7339 return (ret); 7340 } 7341 } 7342 7343 void 7344 cpuid_mwait_free(cpu_t *cpu) 7345 { 7346 if (cpu->cpu_m.mcpu_cpi == NULL) { 7347 return; 7348 } 7349 7350 if (cpu->cpu_m.mcpu_cpi->cpi_mwait.buf_actual != NULL && 7351 cpu->cpu_m.mcpu_cpi->cpi_mwait.size_actual > 0) { 7352 kmem_free(cpu->cpu_m.mcpu_cpi->cpi_mwait.buf_actual, 7353 cpu->cpu_m.mcpu_cpi->cpi_mwait.size_actual); 7354 } 7355 7356 cpu->cpu_m.mcpu_cpi->cpi_mwait.buf_actual = NULL; 7357 cpu->cpu_m.mcpu_cpi->cpi_mwait.size_actual = 0; 7358 } 7359 7360 void 7361 patch_tsc_read(int flag) 7362 { 7363 size_t cnt; 7364 7365 switch (flag) { 7366 case TSC_NONE: 7367 cnt = &_no_rdtsc_end - &_no_rdtsc_start; 7368 (void) memcpy((void *)tsc_read, (void *)&_no_rdtsc_start, cnt); 7369 break; 7370 case TSC_RDTSC_LFENCE: 7371 cnt = &_tsc_lfence_end - &_tsc_lfence_start; 7372 (void) memcpy((void *)tsc_read, 7373 (void *)&_tsc_lfence_start, cnt); 7374 break; 7375 case TSC_TSCP: 7376 cnt = &_tscp_end - &_tscp_start; 7377 (void) memcpy((void *)tsc_read, (void *)&_tscp_start, cnt); 7378 break; 7379 default: 7380 /* Bail for unexpected TSC types. (TSC_NONE covers 0) */ 7381 cmn_err(CE_PANIC, "Unrecogized TSC type: %d", flag); 7382 break; 7383 } 7384 tsc_type = flag; 7385 } 7386 7387 int 7388 cpuid_deep_cstates_supported(void) 7389 { 7390 struct cpuid_info *cpi; 7391 struct cpuid_regs regs; 7392 7393 ASSERT(cpuid_checkpass(CPU, CPUID_PASS_BASIC)); 7394 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 7395 7396 cpi = CPU->cpu_m.mcpu_cpi; 7397 7398 switch (cpi->cpi_vendor) { 7399 case X86_VENDOR_Intel: 7400 if (cpi->cpi_xmaxeax < 0x80000007) 7401 return (0); 7402 7403 /* 7404 * Does TSC run at a constant rate in all C-states? 7405 */ 7406 regs.cp_eax = 0x80000007; 7407 (void) __cpuid_insn(®s); 7408 return (regs.cp_edx & CPUID_TSC_CSTATE_INVARIANCE); 7409 7410 default: 7411 return (0); 7412 } 7413 } 7414 7415 #endif /* !__xpv */ 7416 7417 void 7418 post_startup_cpu_fixups(void) 7419 { 7420 #ifndef __xpv 7421 /* 7422 * Some AMD processors support C1E state. Entering this state will 7423 * cause the local APIC timer to stop, which we can't deal with at 7424 * this time. 7425 */ 7426 if (cpuid_getvendor(CPU) == X86_VENDOR_AMD) { 7427 on_trap_data_t otd; 7428 uint64_t reg; 7429 7430 if (!on_trap(&otd, OT_DATA_ACCESS)) { 7431 reg = rdmsr(MSR_AMD_INT_PENDING_CMP_HALT); 7432 /* Disable C1E state if it is enabled by BIOS */ 7433 if ((reg >> AMD_ACTONCMPHALT_SHIFT) & 7434 AMD_ACTONCMPHALT_MASK) { 7435 reg &= ~(AMD_ACTONCMPHALT_MASK << 7436 AMD_ACTONCMPHALT_SHIFT); 7437 wrmsr(MSR_AMD_INT_PENDING_CMP_HALT, reg); 7438 } 7439 } 7440 no_trap(); 7441 } 7442 #endif /* !__xpv */ 7443 } 7444 7445 void 7446 enable_pcid(void) 7447 { 7448 if (x86_use_pcid == -1) 7449 x86_use_pcid = is_x86_feature(x86_featureset, X86FSET_PCID); 7450 7451 if (x86_use_invpcid == -1) { 7452 x86_use_invpcid = is_x86_feature(x86_featureset, 7453 X86FSET_INVPCID); 7454 } 7455 7456 if (!x86_use_pcid) 7457 return; 7458 7459 /* 7460 * Intel say that on setting PCIDE, it immediately starts using the PCID 7461 * bits; better make sure there's nothing there. 7462 */ 7463 ASSERT((getcr3() & MMU_PAGEOFFSET) == PCID_NONE); 7464 7465 setcr4(getcr4() | CR4_PCIDE); 7466 } 7467 7468 /* 7469 * Setup necessary registers to enable XSAVE feature on this processor. 7470 * This function needs to be called early enough, so that no xsave/xrstor 7471 * ops will execute on the processor before the MSRs are properly set up. 7472 * 7473 * Current implementation has the following assumption: 7474 * - cpuid_pass_basic() is done, so that X86 features are known. 7475 * - fpu_probe() is done, so that fp_save_mech is chosen. 7476 */ 7477 void 7478 xsave_setup_msr(cpu_t *cpu) 7479 { 7480 ASSERT(cpuid_checkpass(cpu, CPUID_PASS_BASIC)); 7481 ASSERT(fp_save_mech == FP_XSAVE); 7482 ASSERT(is_x86_feature(x86_featureset, X86FSET_XSAVE)); 7483 7484 /* Enable OSXSAVE in CR4. */ 7485 setcr4(getcr4() | CR4_OSXSAVE); 7486 /* 7487 * Update SW copy of ECX, so that /dev/cpu/self/cpuid will report 7488 * correct value. 7489 */ 7490 cpu->cpu_m.mcpu_cpi->cpi_std[1].cp_ecx |= CPUID_INTC_ECX_OSXSAVE; 7491 setup_xfem(); 7492 } 7493 7494 /* 7495 * Starting with the Westmere processor the local 7496 * APIC timer will continue running in all C-states, 7497 * including the deepest C-states. 7498 */ 7499 int 7500 cpuid_arat_supported(void) 7501 { 7502 struct cpuid_info *cpi; 7503 struct cpuid_regs regs; 7504 7505 ASSERT(cpuid_checkpass(CPU, CPUID_PASS_BASIC)); 7506 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 7507 7508 cpi = CPU->cpu_m.mcpu_cpi; 7509 7510 switch (cpi->cpi_vendor) { 7511 case X86_VENDOR_Intel: 7512 /* 7513 * Always-running Local APIC Timer is 7514 * indicated by CPUID.6.EAX[2]. 7515 */ 7516 if (cpi->cpi_maxeax >= 6) { 7517 regs.cp_eax = 6; 7518 (void) cpuid_insn(NULL, ®s); 7519 return (regs.cp_eax & CPUID_INTC_EAX_ARAT); 7520 } else { 7521 return (0); 7522 } 7523 default: 7524 return (0); 7525 } 7526 } 7527 7528 /* 7529 * Check support for Intel ENERGY_PERF_BIAS feature 7530 */ 7531 int 7532 cpuid_iepb_supported(struct cpu *cp) 7533 { 7534 struct cpuid_info *cpi = cp->cpu_m.mcpu_cpi; 7535 struct cpuid_regs regs; 7536 7537 ASSERT(cpuid_checkpass(cp, CPUID_PASS_BASIC)); 7538 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 7539 7540 if (!(is_x86_feature(x86_featureset, X86FSET_MSR))) { 7541 return (0); 7542 } 7543 7544 /* 7545 * Intel ENERGY_PERF_BIAS MSR is indicated by 7546 * capability bit CPUID.6.ECX.3 7547 */ 7548 if ((cpi->cpi_vendor != X86_VENDOR_Intel) || (cpi->cpi_maxeax < 6)) 7549 return (0); 7550 7551 regs.cp_eax = 0x6; 7552 (void) cpuid_insn(NULL, ®s); 7553 return (regs.cp_ecx & CPUID_INTC_ECX_PERFBIAS); 7554 } 7555 7556 /* 7557 * Check support for TSC deadline timer 7558 * 7559 * TSC deadline timer provides a superior software programming 7560 * model over local APIC timer that eliminates "time drifts". 7561 * Instead of specifying a relative time, software specifies an 7562 * absolute time as the target at which the processor should 7563 * generate a timer event. 7564 */ 7565 int 7566 cpuid_deadline_tsc_supported(void) 7567 { 7568 struct cpuid_info *cpi = CPU->cpu_m.mcpu_cpi; 7569 struct cpuid_regs regs; 7570 7571 ASSERT(cpuid_checkpass(CPU, CPUID_PASS_BASIC)); 7572 ASSERT(is_x86_feature(x86_featureset, X86FSET_CPUID)); 7573 7574 switch (cpi->cpi_vendor) { 7575 case X86_VENDOR_Intel: 7576 if (cpi->cpi_maxeax >= 1) { 7577 regs.cp_eax = 1; 7578 (void) cpuid_insn(NULL, ®s); 7579 return (regs.cp_ecx & CPUID_DEADLINE_TSC); 7580 } else { 7581 return (0); 7582 } 7583 default: 7584 return (0); 7585 } 7586 } 7587 7588 #if !defined(__xpv) 7589 /* 7590 * Patch in versions of bcopy for high performance Intel Nhm processors 7591 * and later... 7592 */ 7593 void 7594 patch_memops(uint_t vendor) 7595 { 7596 size_t cnt, i; 7597 caddr_t to, from; 7598 7599 if ((vendor == X86_VENDOR_Intel) && 7600 is_x86_feature(x86_featureset, X86FSET_SSE4_2)) { 7601 cnt = &bcopy_patch_end - &bcopy_patch_start; 7602 to = &bcopy_ck_size; 7603 from = &bcopy_patch_start; 7604 for (i = 0; i < cnt; i++) { 7605 *to++ = *from++; 7606 } 7607 } 7608 } 7609 #endif /* !__xpv */ 7610 7611 /* 7612 * We're being asked to tell the system how many bits are required to represent 7613 * the various thread and strand IDs. While it's tempting to derive this based 7614 * on the values in cpi_ncore_per_chip and cpi_ncpu_per_chip, that isn't quite 7615 * correct. Instead, this needs to be based on the number of bits that the APIC 7616 * allows for these different configurations. We only update these to a larger 7617 * value if we find one. 7618 */ 7619 void 7620 cpuid_get_ext_topo(cpu_t *cpu, uint_t *core_nbits, uint_t *strand_nbits) 7621 { 7622 struct cpuid_info *cpi; 7623 7624 VERIFY(cpuid_checkpass(CPU, CPUID_PASS_BASIC)); 7625 cpi = cpu->cpu_m.mcpu_cpi; 7626 7627 if (cpi->cpi_ncore_bits > *core_nbits) { 7628 *core_nbits = cpi->cpi_ncore_bits; 7629 } 7630 7631 if (cpi->cpi_nthread_bits > *strand_nbits) { 7632 *strand_nbits = cpi->cpi_nthread_bits; 7633 } 7634 } 7635 7636 void 7637 cpuid_pass_ucode(cpu_t *cpu, uchar_t *fset) 7638 { 7639 struct cpuid_info *cpi = cpu->cpu_m.mcpu_cpi; 7640 struct cpuid_regs cp; 7641 7642 /* 7643 * Reread the CPUID portions that we need for various security 7644 * information. 7645 */ 7646 if (cpi->cpi_vendor == X86_VENDOR_Intel) { 7647 /* 7648 * Check if we now have leaf 7 available to us. 7649 */ 7650 if (cpi->cpi_maxeax < 7) { 7651 bzero(&cp, sizeof (cp)); 7652 cp.cp_eax = 0; 7653 cpi->cpi_maxeax = __cpuid_insn(&cp); 7654 if (cpi->cpi_maxeax < 7) 7655 return; 7656 } 7657 7658 bzero(&cp, sizeof (cp)); 7659 cp.cp_eax = 7; 7660 cp.cp_ecx = 0; 7661 (void) __cpuid_insn(&cp); 7662 cpi->cpi_std[7] = cp; 7663 } else if (cpi->cpi_vendor == X86_VENDOR_AMD || 7664 cpi->cpi_vendor == X86_VENDOR_HYGON) { 7665 /* No xcpuid support */ 7666 if (cpi->cpi_family < 5 || 7667 (cpi->cpi_family == 5 && cpi->cpi_model < 1)) 7668 return; 7669 7670 if (cpi->cpi_xmaxeax < CPUID_LEAF_EXT_8) { 7671 bzero(&cp, sizeof (cp)); 7672 cp.cp_eax = CPUID_LEAF_EXT_0; 7673 cpi->cpi_xmaxeax = __cpuid_insn(&cp); 7674 if (cpi->cpi_xmaxeax < CPUID_LEAF_EXT_8) { 7675 return; 7676 } 7677 } 7678 7679 bzero(&cp, sizeof (cp)); 7680 cp.cp_eax = CPUID_LEAF_EXT_8; 7681 (void) __cpuid_insn(&cp); 7682 platform_cpuid_mangle(cpi->cpi_vendor, CPUID_LEAF_EXT_8, &cp); 7683 cpi->cpi_extd[8] = cp; 7684 } else { 7685 /* 7686 * Nothing to do here. Return an empty set which has already 7687 * been zeroed for us. 7688 */ 7689 return; 7690 } 7691 cpuid_scan_security(cpu, fset); 7692 } 7693 7694 /* ARGSUSED */ 7695 static int 7696 cpuid_post_ucodeadm_xc(xc_arg_t arg0, xc_arg_t arg1, xc_arg_t arg2) 7697 { 7698 uchar_t *fset; 7699 boolean_t first_pass = (boolean_t)arg1; 7700 7701 fset = (uchar_t *)(arg0 + sizeof (x86_featureset) * CPU->cpu_id); 7702 if (first_pass && CPU->cpu_id != 0) 7703 return (0); 7704 if (!first_pass && CPU->cpu_id == 0) 7705 return (0); 7706 cpuid_pass_ucode(CPU, fset); 7707 7708 return (0); 7709 } 7710 7711 /* 7712 * After a microcode update where the version has changed, then we need to 7713 * rescan CPUID. To do this we check every CPU to make sure that they have the 7714 * same microcode. Then we perform a cross call to all such CPUs. It's the 7715 * caller's job to make sure that no one else can end up doing an update while 7716 * this is going on. 7717 * 7718 * We assume that the system is microcode capable if we're called. 7719 */ 7720 void 7721 cpuid_post_ucodeadm(void) 7722 { 7723 uint32_t rev; 7724 int i; 7725 struct cpu *cpu; 7726 cpuset_t cpuset; 7727 void *argdata; 7728 uchar_t *f0; 7729 7730 argdata = kmem_zalloc(sizeof (x86_featureset) * NCPU, KM_SLEEP); 7731 7732 mutex_enter(&cpu_lock); 7733 cpu = cpu_get(0); 7734 rev = cpu->cpu_m.mcpu_ucode_info->cui_rev; 7735 CPUSET_ONLY(cpuset, 0); 7736 for (i = 1; i < max_ncpus; i++) { 7737 if ((cpu = cpu_get(i)) == NULL) 7738 continue; 7739 7740 if (cpu->cpu_m.mcpu_ucode_info->cui_rev != rev) { 7741 panic("post microcode update CPU %d has differing " 7742 "microcode revision (%u) from CPU 0 (%u)", 7743 i, cpu->cpu_m.mcpu_ucode_info->cui_rev, rev); 7744 } 7745 CPUSET_ADD(cpuset, i); 7746 } 7747 7748 /* 7749 * We do the cross calls in two passes. The first pass is only for the 7750 * boot CPU. The second pass is for all of the other CPUs. This allows 7751 * the boot CPU to go through and change behavior related to patching or 7752 * whether or not Enhanced IBRS needs to be enabled and then allow all 7753 * other CPUs to follow suit. 7754 */ 7755 kpreempt_disable(); 7756 xc_sync((xc_arg_t)argdata, B_TRUE, 0, CPUSET2BV(cpuset), 7757 cpuid_post_ucodeadm_xc); 7758 xc_sync((xc_arg_t)argdata, B_FALSE, 0, CPUSET2BV(cpuset), 7759 cpuid_post_ucodeadm_xc); 7760 kpreempt_enable(); 7761 7762 /* 7763 * OK, now look at each CPU and see if their feature sets are equal. 7764 */ 7765 f0 = argdata; 7766 for (i = 1; i < max_ncpus; i++) { 7767 uchar_t *fset; 7768 if (!CPU_IN_SET(cpuset, i)) 7769 continue; 7770 7771 fset = (uchar_t *)((uintptr_t)argdata + 7772 sizeof (x86_featureset) * i); 7773 7774 if (!compare_x86_featureset(f0, fset)) { 7775 panic("Post microcode update CPU %d has " 7776 "differing security feature (%p) set from CPU 0 " 7777 "(%p), not appending to feature set", i, 7778 (void *)fset, (void *)f0); 7779 } 7780 } 7781 7782 mutex_exit(&cpu_lock); 7783 7784 for (i = 0; i < NUM_X86_FEATURES; i++) { 7785 cmn_err(CE_CONT, "?post-ucode x86_feature: %s\n", 7786 x86_feature_names[i]); 7787 if (is_x86_feature(f0, i)) { 7788 add_x86_feature(x86_featureset, i); 7789 } 7790 } 7791 kmem_free(argdata, sizeof (x86_featureset) * NCPU); 7792 } 7793 7794 typedef void (*cpuid_pass_f)(cpu_t *, void *); 7795 7796 typedef struct cpuid_pass_def { 7797 cpuid_pass_t cpd_pass; 7798 cpuid_pass_f cpd_func; 7799 } cpuid_pass_def_t; 7800 7801 /* 7802 * See block comment at the top; note that cpuid_pass_ucode is not a pass in the 7803 * normal sense and should not appear here. 7804 */ 7805 static const cpuid_pass_def_t cpuid_pass_defs[] = { 7806 { CPUID_PASS_PRELUDE, cpuid_pass_prelude }, 7807 { CPUID_PASS_IDENT, cpuid_pass_ident }, 7808 { CPUID_PASS_BASIC, cpuid_pass_basic }, 7809 { CPUID_PASS_EXTENDED, cpuid_pass_extended }, 7810 { CPUID_PASS_DYNAMIC, cpuid_pass_dynamic }, 7811 { CPUID_PASS_RESOLVE, cpuid_pass_resolve }, 7812 }; 7813 7814 void 7815 cpuid_execpass(cpu_t *cp, cpuid_pass_t pass, void *arg) 7816 { 7817 VERIFY3S(pass, !=, CPUID_PASS_NONE); 7818 7819 if (cp == NULL) 7820 cp = CPU; 7821 7822 /* 7823 * Space statically allocated for BSP, ensure pointer is set 7824 */ 7825 if (cp->cpu_id == 0 && cp->cpu_m.mcpu_cpi == NULL) 7826 cp->cpu_m.mcpu_cpi = &cpuid_info0; 7827 7828 ASSERT(cpuid_checkpass(cp, pass - 1)); 7829 7830 for (uint_t i = 0; i < ARRAY_SIZE(cpuid_pass_defs); i++) { 7831 if (cpuid_pass_defs[i].cpd_pass == pass) { 7832 cpuid_pass_defs[i].cpd_func(cp, arg); 7833 cp->cpu_m.mcpu_cpi->cpi_pass = pass; 7834 return; 7835 } 7836 } 7837 7838 panic("unable to execute invalid cpuid pass %d on cpu%d\n", 7839 pass, cp->cpu_id); 7840 } 7841 7842 /* 7843 * Extract the processor family from a chiprev. Processor families are not the 7844 * same as cpuid families; see comments above and in x86_archext.h. 7845 */ 7846 x86_processor_family_t 7847 chiprev_family(const x86_chiprev_t cr) 7848 { 7849 return ((x86_processor_family_t)_X86_CHIPREV_FAMILY(cr)); 7850 } 7851 7852 /* 7853 * A chiprev matches its template if the vendor and family are identical and the 7854 * revision of the chiprev matches one of the bits set in the template. Callers 7855 * may bitwise-OR together chiprevs of the same vendor and family to form the 7856 * template, or use the _ANY variant. It is not possible to match chiprevs of 7857 * multiple vendors or processor families with a single call. Note that this 7858 * function operates on processor families, not cpuid families. 7859 */ 7860 boolean_t 7861 chiprev_matches(const x86_chiprev_t cr, const x86_chiprev_t template) 7862 { 7863 return (_X86_CHIPREV_VENDOR(cr) == _X86_CHIPREV_VENDOR(template) && 7864 _X86_CHIPREV_FAMILY(cr) == _X86_CHIPREV_FAMILY(template) && 7865 (_X86_CHIPREV_REV(cr) & _X86_CHIPREV_REV(template)) != 0); 7866 } 7867 7868 /* 7869 * A chiprev is at least min if the vendor and family are identical and the 7870 * revision of the chiprev is at least as recent as that of min. Processor 7871 * families are considered unordered and cannot be compared using this function. 7872 * Note that this function operates on processor families, not cpuid families. 7873 * Use of the _ANY chiprev variant with this function is not useful; it will 7874 * always return B_FALSE if the _ANY variant is supplied as the minimum 7875 * revision. To determine only whether a chiprev is of a given processor 7876 * family, test the return value of chiprev_family() instead. 7877 */ 7878 boolean_t 7879 chiprev_at_least(const x86_chiprev_t cr, const x86_chiprev_t min) 7880 { 7881 return (_X86_CHIPREV_VENDOR(cr) == _X86_CHIPREV_VENDOR(min) && 7882 _X86_CHIPREV_FAMILY(cr) == _X86_CHIPREV_FAMILY(min) && 7883 _X86_CHIPREV_REV(cr) >= _X86_CHIPREV_REV(min)); 7884 } 7885 7886 /* 7887 * The uarch functions operate in a manner similar to the chiprev functions 7888 * above. While it is tempting to allow these to operate on microarchitectures 7889 * produced by a specific vendor in an ordered fashion (e.g., ZEN3 is "newer" 7890 * than ZEN2), we elect not to do so because a manufacturer may supply 7891 * processors of multiple different microarchitecture families each of which may 7892 * be internally ordered but unordered with respect to those of other families. 7893 */ 7894 x86_uarch_t 7895 uarchrev_uarch(const x86_uarchrev_t ur) 7896 { 7897 return ((x86_uarch_t)_X86_UARCHREV_UARCH(ur)); 7898 } 7899 7900 boolean_t 7901 uarchrev_matches(const x86_uarchrev_t ur, const x86_uarchrev_t template) 7902 { 7903 return (_X86_UARCHREV_VENDOR(ur) == _X86_UARCHREV_VENDOR(template) && 7904 _X86_UARCHREV_UARCH(ur) == _X86_UARCHREV_UARCH(template) && 7905 (_X86_UARCHREV_REV(ur) & _X86_UARCHREV_REV(template)) != 0); 7906 } 7907 7908 boolean_t 7909 uarchrev_at_least(const x86_uarchrev_t ur, const x86_uarchrev_t min) 7910 { 7911 return (_X86_UARCHREV_VENDOR(ur) == _X86_UARCHREV_VENDOR(min) && 7912 _X86_UARCHREV_UARCH(ur) == _X86_UARCHREV_UARCH(min) && 7913 _X86_UARCHREV_REV(ur) >= _X86_UARCHREV_REV(min)); 7914 } 7915