1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2011 NetApp, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 /* 31 * This file and its contents are supplied under the terms of the 32 * Common Development and Distribution License ("CDDL"), version 1.0. 33 * You may only use this file in accordance with the terms of version 34 * 1.0 of the CDDL. 35 * 36 * A full copy of the text of the CDDL should have accompanied this 37 * source. A copy of the CDDL is also available via the Internet at 38 * http://www.illumos.org/license/CDDL. 39 * 40 * Copyright 2015 Pluribus Networks Inc. 41 * Copyright 2019 Joyent, Inc. 42 * Copyright 2022 Oxide Computer Company 43 */ 44 45 #ifndef _VMM_H_ 46 #define _VMM_H_ 47 48 enum vm_suspend_how { 49 VM_SUSPEND_NONE, 50 VM_SUSPEND_RESET, 51 VM_SUSPEND_POWEROFF, 52 VM_SUSPEND_HALT, 53 VM_SUSPEND_TRIPLEFAULT, 54 VM_SUSPEND_LAST 55 }; 56 57 /* 58 * Identifiers for architecturally defined registers. 59 */ 60 enum vm_reg_name { 61 VM_REG_GUEST_RAX, 62 VM_REG_GUEST_RBX, 63 VM_REG_GUEST_RCX, 64 VM_REG_GUEST_RDX, 65 VM_REG_GUEST_RSI, 66 VM_REG_GUEST_RDI, 67 VM_REG_GUEST_RBP, 68 VM_REG_GUEST_R8, 69 VM_REG_GUEST_R9, 70 VM_REG_GUEST_R10, 71 VM_REG_GUEST_R11, 72 VM_REG_GUEST_R12, 73 VM_REG_GUEST_R13, 74 VM_REG_GUEST_R14, 75 VM_REG_GUEST_R15, 76 VM_REG_GUEST_CR0, 77 VM_REG_GUEST_CR3, 78 VM_REG_GUEST_CR4, 79 VM_REG_GUEST_DR7, 80 VM_REG_GUEST_RSP, 81 VM_REG_GUEST_RIP, 82 VM_REG_GUEST_RFLAGS, 83 VM_REG_GUEST_ES, 84 VM_REG_GUEST_CS, 85 VM_REG_GUEST_SS, 86 VM_REG_GUEST_DS, 87 VM_REG_GUEST_FS, 88 VM_REG_GUEST_GS, 89 VM_REG_GUEST_LDTR, 90 VM_REG_GUEST_TR, 91 VM_REG_GUEST_IDTR, 92 VM_REG_GUEST_GDTR, 93 VM_REG_GUEST_EFER, 94 VM_REG_GUEST_CR2, 95 VM_REG_GUEST_PDPTE0, 96 VM_REG_GUEST_PDPTE1, 97 VM_REG_GUEST_PDPTE2, 98 VM_REG_GUEST_PDPTE3, 99 VM_REG_GUEST_INTR_SHADOW, 100 VM_REG_GUEST_DR0, 101 VM_REG_GUEST_DR1, 102 VM_REG_GUEST_DR2, 103 VM_REG_GUEST_DR3, 104 VM_REG_GUEST_DR6, 105 VM_REG_GUEST_ENTRY_INST_LENGTH, 106 VM_REG_GUEST_XCR0, 107 VM_REG_LAST 108 }; 109 110 enum x2apic_state { 111 X2APIC_DISABLED, 112 X2APIC_ENABLED, 113 X2APIC_STATE_LAST 114 }; 115 116 #define VM_INTINFO_MASK_VECTOR 0xffUL 117 #define VM_INTINFO_MASK_TYPE 0x700UL 118 #define VM_INTINFO_MASK_RSVD 0x7ffff000UL 119 #define VM_INTINFO_SHIFT_ERRCODE 32 120 121 #define VM_INTINFO_VECTOR(val) ((val) & VM_INTINFO_MASK_VECTOR) 122 #define VM_INTINFO_TYPE(val) ((val) & VM_INTINFO_MASK_TYPE) 123 #define VM_INTINFO_ERRCODE(val) ((val) >> VM_INTINFO_SHIFT_ERRCODE) 124 #define VM_INTINFO_PENDING(val) (((val) & VM_INTINFO_VALID) != 0) 125 #define VM_INTINFO_HAS_ERRCODE(val) (((val) & VM_INTINFO_DEL_ERRCODE) != 0) 126 127 #define VM_INTINFO_VALID (1UL << 31) 128 #define VM_INTINFO_DEL_ERRCODE (1UL << 11) 129 130 #define VM_INTINFO_HWINTR (0 << 8) 131 #define VM_INTINFO_NMI (2 << 8) 132 #define VM_INTINFO_HWEXCP (3 << 8) 133 #define VM_INTINFO_SWINTR (4 << 8) 134 /* Reserved for CPU (read: Intel) specific types */ 135 #define VM_INTINFO_RESV1 (1 << 8) 136 #define VM_INTINFO_RESV5 (5 << 8) 137 #define VM_INTINFO_RESV6 (6 << 8) 138 #define VM_INTINFO_RESV7 (7 << 8) 139 140 /* 141 * illumos doesn't have a limitation based on SPECNAMELEN like FreeBSD does. 142 * To simplify structure definitions, an arbitrary limit has been chosen. 143 * This same limit is used for memory segment names 144 */ 145 146 #define VM_MAX_NAMELEN 128 147 #define VM_MAX_SEG_NAMELEN 128 148 149 #ifdef _KERNEL 150 #define VM_MAXCPU 32 /* maximum virtual cpus */ 151 #endif 152 153 /* 154 * Identifiers for optional vmm capabilities 155 */ 156 enum vm_cap_type { 157 VM_CAP_HALT_EXIT, 158 VM_CAP_MTRAP_EXIT, 159 VM_CAP_PAUSE_EXIT, 160 VM_CAP_ENABLE_INVPCID, 161 VM_CAP_BPT_EXIT, 162 VM_CAP_MAX 163 }; 164 165 enum vmx_caps { 166 VMX_CAP_NONE = 0, 167 VMX_CAP_TPR_SHADOW = (1UL << 0), 168 VMX_CAP_APICV = (1UL << 1), 169 VMX_CAP_APICV_X2APIC = (1UL << 2), 170 VMX_CAP_APICV_PIR = (1UL << 3), 171 }; 172 173 enum vm_intr_trigger { 174 EDGE_TRIGGER, 175 LEVEL_TRIGGER 176 }; 177 178 /* 179 * The 'access' field has the format specified in Table 21-2 of the Intel 180 * Architecture Manual vol 3b. 181 * 182 * XXX The contents of the 'access' field are architecturally defined except 183 * bit 16 - Segment Unusable. 184 */ 185 struct seg_desc { 186 uint64_t base; 187 uint32_t limit; 188 uint32_t access; 189 }; 190 #define SEG_DESC_TYPE(access) ((access) & 0x001f) 191 #define SEG_DESC_DPL_MASK 0x3 192 #define SEG_DESC_DPL_SHIFT 5 193 #define SEG_DESC_DPL(access) \ 194 (((access) >> SEG_DESC_DPL_SHIFT) & SEG_DESC_DPL_MASK) 195 #define SEG_DESC_PRESENT(access) (((access) & 0x0080) ? 1 : 0) 196 #define SEG_DESC_DEF32(access) (((access) & 0x4000) ? 1 : 0) 197 #define SEG_DESC_GRANULARITY(access) (((access) & 0x8000) ? 1 : 0) 198 #define SEG_DESC_UNUSABLE(access) (((access) & 0x10000) ? 1 : 0) 199 200 enum vm_cpu_mode { 201 CPU_MODE_REAL, 202 CPU_MODE_PROTECTED, 203 CPU_MODE_COMPATIBILITY, /* IA-32E mode (CS.L = 0) */ 204 CPU_MODE_64BIT, /* IA-32E mode (CS.L = 1) */ 205 }; 206 207 enum vm_paging_mode { 208 PAGING_MODE_FLAT, 209 PAGING_MODE_32, 210 PAGING_MODE_PAE, 211 PAGING_MODE_64, 212 }; 213 214 struct vm_guest_paging { 215 uint64_t cr3; 216 int cpl; 217 enum vm_cpu_mode cpu_mode; 218 enum vm_paging_mode paging_mode; 219 }; 220 221 enum vm_exitcode { 222 VM_EXITCODE_INOUT, 223 VM_EXITCODE_VMX, 224 VM_EXITCODE_BOGUS, 225 VM_EXITCODE_RDMSR, 226 VM_EXITCODE_WRMSR, 227 VM_EXITCODE_HLT, 228 VM_EXITCODE_MTRAP, 229 VM_EXITCODE_PAUSE, 230 VM_EXITCODE_PAGING, 231 VM_EXITCODE_INST_EMUL, 232 VM_EXITCODE_RUN_STATE, 233 VM_EXITCODE_MMIO_EMUL, 234 VM_EXITCODE_DEPRECATED, /* formerly RUNBLOCK */ 235 VM_EXITCODE_IOAPIC_EOI, 236 VM_EXITCODE_SUSPENDED, 237 VM_EXITCODE_MMIO, 238 VM_EXITCODE_TASK_SWITCH, 239 VM_EXITCODE_MONITOR, 240 VM_EXITCODE_MWAIT, 241 VM_EXITCODE_SVM, 242 VM_EXITCODE_REQIDLE, 243 VM_EXITCODE_DEBUG, 244 VM_EXITCODE_VMINSN, 245 VM_EXITCODE_BPT, 246 VM_EXITCODE_HT, 247 VM_EXITCODE_MAX 248 }; 249 250 enum inout_flags { 251 INOUT_IN = (1U << 0), /* direction: 'in' when set, else 'out' */ 252 253 /* 254 * The following flags are used only for in-kernel emulation logic and 255 * are not exposed to userspace. 256 */ 257 INOUT_STR = (1U << 1), /* ins/outs operation */ 258 INOUT_REP = (1U << 2), /* 'rep' prefix present on instruction */ 259 }; 260 261 struct vm_inout { 262 uint32_t eax; 263 uint16_t port; 264 uint8_t bytes; /* 1 or 2 or 4 */ 265 uint8_t flags; /* see: inout_flags */ 266 267 /* 268 * The address size and segment are relevant to INS/OUTS operations. 269 * Userspace is not concerned with them since the in-kernel emulation 270 * handles those specific aspects. 271 */ 272 uint8_t addrsize; 273 uint8_t segment; 274 }; 275 276 struct vm_mmio { 277 uint8_t bytes; /* 1/2/4/8 bytes */ 278 uint8_t read; /* read: 1, write: 0 */ 279 uint16_t _pad[3]; 280 uint64_t gpa; 281 uint64_t data; 282 }; 283 284 enum task_switch_reason { 285 TSR_CALL, 286 TSR_IRET, 287 TSR_JMP, 288 TSR_IDT_GATE, /* task gate in IDT */ 289 }; 290 291 struct vm_task_switch { 292 uint16_t tsssel; /* new TSS selector */ 293 int ext; /* task switch due to external event */ 294 uint32_t errcode; 295 int errcode_valid; /* push 'errcode' on the new stack */ 296 enum task_switch_reason reason; 297 struct vm_guest_paging paging; 298 }; 299 300 enum vcpu_run_state { 301 VRS_HALT = 0, 302 VRS_INIT = (1 << 0), 303 VRS_RUN = (1 << 1), 304 305 VRS_PEND_INIT = (1 << 14), 306 VRS_PEND_SIPI = (1 << 15), 307 }; 308 #define VRS_MASK_VALID(v) \ 309 ((v) & (VRS_INIT | VRS_RUN | VRS_PEND_SIPI | VRS_PEND_SIPI)) 310 #define VRS_IS_VALID(v) ((v) == VRS_MASK_VALID(v)) 311 312 struct vm_exit { 313 enum vm_exitcode exitcode; 314 int inst_length; /* 0 means unknown */ 315 uint64_t rip; 316 union { 317 struct vm_inout inout; 318 struct vm_mmio mmio; 319 struct { 320 uint64_t gpa; 321 int fault_type; 322 } paging; 323 /* 324 * Kernel-internal MMIO decoding and emulation. 325 * Userspace should not expect to see this, but rather a 326 * VM_EXITCODE_MMIO with the above 'mmio' context. 327 */ 328 struct { 329 uint64_t gpa; 330 uint64_t gla; 331 uint64_t cs_base; 332 int cs_d; /* CS.D */ 333 } mmio_emul; 334 struct { 335 uint8_t inst[15]; 336 uint8_t num_valid; 337 } inst_emul; 338 /* 339 * VMX specific payload. Used when there is no "better" 340 * exitcode to represent the VM-exit. 341 */ 342 struct { 343 int status; /* vmx inst status */ 344 /* 345 * 'exit_reason' and 'exit_qualification' are valid 346 * only if 'status' is zero. 347 */ 348 uint32_t exit_reason; 349 uint64_t exit_qualification; 350 /* 351 * 'inst_error' and 'inst_type' are valid 352 * only if 'status' is non-zero. 353 */ 354 int inst_type; 355 int inst_error; 356 } vmx; 357 /* 358 * SVM specific payload. 359 */ 360 struct { 361 uint64_t exitcode; 362 uint64_t exitinfo1; 363 uint64_t exitinfo2; 364 } svm; 365 struct { 366 int inst_length; 367 } bpt; 368 struct { 369 uint32_t code; /* ecx value */ 370 uint64_t wval; 371 } msr; 372 struct { 373 uint64_t rflags; 374 } hlt; 375 struct { 376 int vector; 377 } ioapic_eoi; 378 struct { 379 enum vm_suspend_how how; 380 } suspended; 381 struct vm_task_switch task_switch; 382 } u; 383 }; 384 385 enum vm_entry_cmds { 386 VEC_DEFAULT = 0, 387 VEC_DISCARD_INSTR, /* discard inst emul state */ 388 VEC_FULFILL_MMIO, /* entry includes result for mmio emul */ 389 VEC_FULFILL_INOUT, /* entry includes result for inout emul */ 390 }; 391 392 struct vm_entry { 393 int cpuid; 394 uint_t cmd; /* see: vm_entry_cmds */ 395 void *exit_data; 396 union { 397 struct vm_inout inout; 398 struct vm_mmio mmio; 399 } u; 400 }; 401 402 int vm_restart_instruction(void *vm, int vcpuid); 403 404 enum vm_create_flags { 405 /* 406 * Allocate guest memory segments from existing reservoir capacity, 407 * rather than attempting to create transient allocations. 408 */ 409 VCF_RESERVOIR_MEM = (1 << 0), 410 411 /* 412 * Enable dirty page tracking for the guest. 413 */ 414 VCF_TRACK_DIRTY = (1 << 1), 415 }; 416 417 /* 418 * Describes an entry for `cpuid` emulation. 419 * Used internally by bhyve (kernel) in addition to exposed ioctl(2) interface. 420 */ 421 struct vcpu_cpuid_entry { 422 uint32_t vce_function; 423 uint32_t vce_index; 424 uint32_t vce_flags; 425 uint32_t vce_eax; 426 uint32_t vce_ebx; 427 uint32_t vce_ecx; 428 uint32_t vce_edx; 429 uint32_t _pad; 430 }; 431 432 /* 433 * Defined flags for vcpu_cpuid_entry`vce_flags are below. 434 */ 435 436 /* Use index (ecx) input value when matching entry */ 437 #define VCE_FLAG_MATCH_INDEX (1 << 0) 438 439 /* All valid flacts for vcpu_cpuid_entry`vce_flags */ 440 #define VCE_FLAGS_VALID VCE_FLAG_MATCH_INDEX 441 442 /* 443 * Defined flags for vcpu_cpuid configuration are below. 444 * These are used by both the ioctl(2) interface via vm_vcpu_cpuid_config and 445 * internally in the kernel vmm. 446 */ 447 448 /* Use legacy hard-coded cpuid masking tables applied to the host CPU */ 449 #define VCC_FLAG_LEGACY_HANDLING (1 << 0) 450 /* 451 * Emulate Intel-style fallback behavior (emit highest "standard" entry) if the 452 * queried function/index do not match. If not set, emulate AMD-style, where 453 * all zeroes are returned in such cases. 454 */ 455 #define VCC_FLAG_INTEL_FALLBACK (1 << 1) 456 457 /* All valid flacts for vm_vcpu_cpuid_config`vvcc_flags */ 458 #define VCC_FLAGS_VALID \ 459 (VCC_FLAG_LEGACY_HANDLING | VCC_FLAG_INTEL_FALLBACK) 460 461 /* Maximum vcpu_cpuid_entry records per vCPU */ 462 #define VMM_MAX_CPUID_ENTRIES 256 463 464 #endif /* _VMM_H_ */ 465