1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012,2013 - ARM Ltd 4 * Author: Marc Zyngier <marc.zyngier@arm.com> 5 * 6 * Derived from arch/arm/include/asm/kvm_host.h: 7 * Copyright (C) 2012 - Virtual Open Systems and Columbia University 8 * Author: Christoffer Dall <c.dall@virtualopensystems.com> 9 */ 10 11 #ifndef __ARM64_KVM_HOST_H__ 12 #define __ARM64_KVM_HOST_H__ 13 14 #include <linux/arm-smccc.h> 15 #include <linux/bitmap.h> 16 #include <linux/types.h> 17 #include <linux/jump_label.h> 18 #include <linux/kvm_types.h> 19 #include <linux/maple_tree.h> 20 #include <linux/percpu.h> 21 #include <linux/psci.h> 22 #include <asm/arch_gicv3.h> 23 #include <asm/barrier.h> 24 #include <asm/cpufeature.h> 25 #include <asm/cputype.h> 26 #include <asm/daifflags.h> 27 #include <asm/fpsimd.h> 28 #include <asm/kvm.h> 29 #include <asm/kvm_asm.h> 30 #include <asm/vncr_mapping.h> 31 32 #define __KVM_HAVE_ARCH_INTC_INITIALIZED 33 34 #define KVM_HALT_POLL_NS_DEFAULT 500000 35 36 #include <kvm/arm_vgic.h> 37 #include <kvm/arm_arch_timer.h> 38 #include <kvm/arm_pmu.h> 39 40 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS 41 42 #define KVM_VCPU_MAX_FEATURES 7 43 #define KVM_VCPU_VALID_FEATURES (BIT(KVM_VCPU_MAX_FEATURES) - 1) 44 45 #define KVM_REQ_SLEEP \ 46 KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 47 #define KVM_REQ_IRQ_PENDING KVM_ARCH_REQ(1) 48 #define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(2) 49 #define KVM_REQ_RECORD_STEAL KVM_ARCH_REQ(3) 50 #define KVM_REQ_RELOAD_GICv4 KVM_ARCH_REQ(4) 51 #define KVM_REQ_RELOAD_PMU KVM_ARCH_REQ(5) 52 #define KVM_REQ_SUSPEND KVM_ARCH_REQ(6) 53 #define KVM_REQ_RESYNC_PMU_EL0 KVM_ARCH_REQ(7) 54 55 #define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ 56 KVM_DIRTY_LOG_INITIALLY_SET) 57 58 #define KVM_HAVE_MMU_RWLOCK 59 60 /* 61 * Mode of operation configurable with kvm-arm.mode early param. 62 * See Documentation/admin-guide/kernel-parameters.txt for more information. 63 */ 64 enum kvm_mode { 65 KVM_MODE_DEFAULT, 66 KVM_MODE_PROTECTED, 67 KVM_MODE_NV, 68 KVM_MODE_NONE, 69 }; 70 #ifdef CONFIG_KVM 71 enum kvm_mode kvm_get_mode(void); 72 #else 73 static inline enum kvm_mode kvm_get_mode(void) { return KVM_MODE_NONE; }; 74 #endif 75 76 DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use); 77 78 extern unsigned int __ro_after_init kvm_sve_max_vl; 79 int __init kvm_arm_init_sve(void); 80 81 u32 __attribute_const__ kvm_target_cpu(void); 82 void kvm_reset_vcpu(struct kvm_vcpu *vcpu); 83 void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu); 84 85 struct kvm_hyp_memcache { 86 phys_addr_t head; 87 unsigned long nr_pages; 88 }; 89 90 static inline void push_hyp_memcache(struct kvm_hyp_memcache *mc, 91 phys_addr_t *p, 92 phys_addr_t (*to_pa)(void *virt)) 93 { 94 *p = mc->head; 95 mc->head = to_pa(p); 96 mc->nr_pages++; 97 } 98 99 static inline void *pop_hyp_memcache(struct kvm_hyp_memcache *mc, 100 void *(*to_va)(phys_addr_t phys)) 101 { 102 phys_addr_t *p = to_va(mc->head); 103 104 if (!mc->nr_pages) 105 return NULL; 106 107 mc->head = *p; 108 mc->nr_pages--; 109 110 return p; 111 } 112 113 static inline int __topup_hyp_memcache(struct kvm_hyp_memcache *mc, 114 unsigned long min_pages, 115 void *(*alloc_fn)(void *arg), 116 phys_addr_t (*to_pa)(void *virt), 117 void *arg) 118 { 119 while (mc->nr_pages < min_pages) { 120 phys_addr_t *p = alloc_fn(arg); 121 122 if (!p) 123 return -ENOMEM; 124 push_hyp_memcache(mc, p, to_pa); 125 } 126 127 return 0; 128 } 129 130 static inline void __free_hyp_memcache(struct kvm_hyp_memcache *mc, 131 void (*free_fn)(void *virt, void *arg), 132 void *(*to_va)(phys_addr_t phys), 133 void *arg) 134 { 135 while (mc->nr_pages) 136 free_fn(pop_hyp_memcache(mc, to_va), arg); 137 } 138 139 void free_hyp_memcache(struct kvm_hyp_memcache *mc); 140 int topup_hyp_memcache(struct kvm_hyp_memcache *mc, unsigned long min_pages); 141 142 struct kvm_vmid { 143 atomic64_t id; 144 }; 145 146 struct kvm_s2_mmu { 147 struct kvm_vmid vmid; 148 149 /* 150 * stage2 entry level table 151 * 152 * Two kvm_s2_mmu structures in the same VM can point to the same 153 * pgd here. This happens when running a guest using a 154 * translation regime that isn't affected by its own stage-2 155 * translation, such as a non-VHE hypervisor running at vEL2, or 156 * for vEL1/EL0 with vHCR_EL2.VM == 0. In that case, we use the 157 * canonical stage-2 page tables. 158 */ 159 phys_addr_t pgd_phys; 160 struct kvm_pgtable *pgt; 161 162 /* 163 * VTCR value used on the host. For a non-NV guest (or a NV 164 * guest that runs in a context where its own S2 doesn't 165 * apply), its T0SZ value reflects that of the IPA size. 166 * 167 * For a shadow S2 MMU, T0SZ reflects the PARange exposed to 168 * the guest. 169 */ 170 u64 vtcr; 171 172 /* The last vcpu id that ran on each physical CPU */ 173 int __percpu *last_vcpu_ran; 174 175 #define KVM_ARM_EAGER_SPLIT_CHUNK_SIZE_DEFAULT 0 176 /* 177 * Memory cache used to split 178 * KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE worth of huge pages. It 179 * is used to allocate stage2 page tables while splitting huge 180 * pages. The choice of KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE 181 * influences both the capacity of the split page cache, and 182 * how often KVM reschedules. Be wary of raising CHUNK_SIZE 183 * too high. 184 * 185 * Protected by kvm->slots_lock. 186 */ 187 struct kvm_mmu_memory_cache split_page_cache; 188 uint64_t split_page_chunk_size; 189 190 struct kvm_arch *arch; 191 }; 192 193 struct kvm_arch_memory_slot { 194 }; 195 196 /** 197 * struct kvm_smccc_features: Descriptor of the hypercall services exposed to the guests 198 * 199 * @std_bmap: Bitmap of standard secure service calls 200 * @std_hyp_bmap: Bitmap of standard hypervisor service calls 201 * @vendor_hyp_bmap: Bitmap of vendor specific hypervisor service calls 202 */ 203 struct kvm_smccc_features { 204 unsigned long std_bmap; 205 unsigned long std_hyp_bmap; 206 unsigned long vendor_hyp_bmap; 207 }; 208 209 typedef unsigned int pkvm_handle_t; 210 211 struct kvm_protected_vm { 212 pkvm_handle_t handle; 213 struct kvm_hyp_memcache teardown_mc; 214 }; 215 216 struct kvm_mpidr_data { 217 u64 mpidr_mask; 218 DECLARE_FLEX_ARRAY(u16, cmpidr_to_idx); 219 }; 220 221 static inline u16 kvm_mpidr_index(struct kvm_mpidr_data *data, u64 mpidr) 222 { 223 unsigned long mask = data->mpidr_mask; 224 u64 aff = mpidr & MPIDR_HWID_BITMASK; 225 int nbits, bit, bit_idx = 0; 226 u16 index = 0; 227 228 /* 229 * If this looks like RISC-V's BEXT or x86's PEXT 230 * instructions, it isn't by accident. 231 */ 232 nbits = fls(mask); 233 for_each_set_bit(bit, &mask, nbits) { 234 index |= (aff & BIT(bit)) >> (bit - bit_idx); 235 bit_idx++; 236 } 237 238 return index; 239 } 240 241 struct kvm_arch { 242 struct kvm_s2_mmu mmu; 243 244 /* Interrupt controller */ 245 struct vgic_dist vgic; 246 247 /* Timers */ 248 struct arch_timer_vm_data timer_data; 249 250 /* Mandated version of PSCI */ 251 u32 psci_version; 252 253 /* Protects VM-scoped configuration data */ 254 struct mutex config_lock; 255 256 /* 257 * If we encounter a data abort without valid instruction syndrome 258 * information, report this to user space. User space can (and 259 * should) opt in to this feature if KVM_CAP_ARM_NISV_TO_USER is 260 * supported. 261 */ 262 #define KVM_ARCH_FLAG_RETURN_NISV_IO_ABORT_TO_USER 0 263 /* Memory Tagging Extension enabled for the guest */ 264 #define KVM_ARCH_FLAG_MTE_ENABLED 1 265 /* At least one vCPU has ran in the VM */ 266 #define KVM_ARCH_FLAG_HAS_RAN_ONCE 2 267 /* The vCPU feature set for the VM is configured */ 268 #define KVM_ARCH_FLAG_VCPU_FEATURES_CONFIGURED 3 269 /* PSCI SYSTEM_SUSPEND enabled for the guest */ 270 #define KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED 4 271 /* VM counter offset */ 272 #define KVM_ARCH_FLAG_VM_COUNTER_OFFSET 5 273 /* Timer PPIs made immutable */ 274 #define KVM_ARCH_FLAG_TIMER_PPIS_IMMUTABLE 6 275 /* Initial ID reg values loaded */ 276 #define KVM_ARCH_FLAG_ID_REGS_INITIALIZED 7 277 unsigned long flags; 278 279 /* VM-wide vCPU feature set */ 280 DECLARE_BITMAP(vcpu_features, KVM_VCPU_MAX_FEATURES); 281 282 /* MPIDR to vcpu index mapping, optional */ 283 struct kvm_mpidr_data *mpidr_data; 284 285 /* 286 * VM-wide PMU filter, implemented as a bitmap and big enough for 287 * up to 2^10 events (ARMv8.0) or 2^16 events (ARMv8.1+). 288 */ 289 unsigned long *pmu_filter; 290 struct arm_pmu *arm_pmu; 291 292 cpumask_var_t supported_cpus; 293 294 /* PMCR_EL0.N value for the guest */ 295 u8 pmcr_n; 296 297 /* Hypercall features firmware registers' descriptor */ 298 struct kvm_smccc_features smccc_feat; 299 struct maple_tree smccc_filter; 300 301 /* 302 * Emulated CPU ID registers per VM 303 * (Op0, Op1, CRn, CRm, Op2) of the ID registers to be saved in it 304 * is (3, 0, 0, crm, op2), where 1<=crm<8, 0<=op2<8. 305 * 306 * These emulated idregs are VM-wide, but accessed from the context of a vCPU. 307 * Atomic access to multiple idregs are guarded by kvm_arch.config_lock. 308 */ 309 #define IDREG_IDX(id) (((sys_reg_CRm(id) - 1) << 3) | sys_reg_Op2(id)) 310 #define IDX_IDREG(idx) sys_reg(3, 0, 0, ((idx) >> 3) + 1, (idx) & Op2_mask) 311 #define IDREG(kvm, id) ((kvm)->arch.id_regs[IDREG_IDX(id)]) 312 #define KVM_ARM_ID_REG_NUM (IDREG_IDX(sys_reg(3, 0, 0, 7, 7)) + 1) 313 u64 id_regs[KVM_ARM_ID_REG_NUM]; 314 315 /* 316 * For an untrusted host VM, 'pkvm.handle' is used to lookup 317 * the associated pKVM instance in the hypervisor. 318 */ 319 struct kvm_protected_vm pkvm; 320 }; 321 322 struct kvm_vcpu_fault_info { 323 u64 esr_el2; /* Hyp Syndrom Register */ 324 u64 far_el2; /* Hyp Fault Address Register */ 325 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 326 u64 disr_el1; /* Deferred [SError] Status Register */ 327 }; 328 329 /* 330 * VNCR() just places the VNCR_capable registers in the enum after 331 * __VNCR_START__, and the value (after correction) to be an 8-byte offset 332 * from the VNCR base. As we don't require the enum to be otherwise ordered, 333 * we need the terrible hack below to ensure that we correctly size the 334 * sys_regs array, no matter what. 335 * 336 * The __MAX__ macro has been lifted from Sean Eron Anderson's wonderful 337 * treasure trove of bit hacks: 338 * https://graphics.stanford.edu/~seander/bithacks.html#IntegerMinOrMax 339 */ 340 #define __MAX__(x,y) ((x) ^ (((x) ^ (y)) & -((x) < (y)))) 341 #define VNCR(r) \ 342 __before_##r, \ 343 r = __VNCR_START__ + ((VNCR_ ## r) / 8), \ 344 __after_##r = __MAX__(__before_##r - 1, r) 345 346 enum vcpu_sysreg { 347 __INVALID_SYSREG__, /* 0 is reserved as an invalid value */ 348 MPIDR_EL1, /* MultiProcessor Affinity Register */ 349 CLIDR_EL1, /* Cache Level ID Register */ 350 CSSELR_EL1, /* Cache Size Selection Register */ 351 TPIDR_EL0, /* Thread ID, User R/W */ 352 TPIDRRO_EL0, /* Thread ID, User R/O */ 353 TPIDR_EL1, /* Thread ID, Privileged */ 354 CNTKCTL_EL1, /* Timer Control Register (EL1) */ 355 PAR_EL1, /* Physical Address Register */ 356 MDCCINT_EL1, /* Monitor Debug Comms Channel Interrupt Enable Reg */ 357 OSLSR_EL1, /* OS Lock Status Register */ 358 DISR_EL1, /* Deferred Interrupt Status Register */ 359 360 /* Performance Monitors Registers */ 361 PMCR_EL0, /* Control Register */ 362 PMSELR_EL0, /* Event Counter Selection Register */ 363 PMEVCNTR0_EL0, /* Event Counter Register (0-30) */ 364 PMEVCNTR30_EL0 = PMEVCNTR0_EL0 + 30, 365 PMCCNTR_EL0, /* Cycle Counter Register */ 366 PMEVTYPER0_EL0, /* Event Type Register (0-30) */ 367 PMEVTYPER30_EL0 = PMEVTYPER0_EL0 + 30, 368 PMCCFILTR_EL0, /* Cycle Count Filter Register */ 369 PMCNTENSET_EL0, /* Count Enable Set Register */ 370 PMINTENSET_EL1, /* Interrupt Enable Set Register */ 371 PMOVSSET_EL0, /* Overflow Flag Status Set Register */ 372 PMUSERENR_EL0, /* User Enable Register */ 373 374 /* Pointer Authentication Registers in a strict increasing order. */ 375 APIAKEYLO_EL1, 376 APIAKEYHI_EL1, 377 APIBKEYLO_EL1, 378 APIBKEYHI_EL1, 379 APDAKEYLO_EL1, 380 APDAKEYHI_EL1, 381 APDBKEYLO_EL1, 382 APDBKEYHI_EL1, 383 APGAKEYLO_EL1, 384 APGAKEYHI_EL1, 385 386 /* Memory Tagging Extension registers */ 387 RGSR_EL1, /* Random Allocation Tag Seed Register */ 388 GCR_EL1, /* Tag Control Register */ 389 TFSRE0_EL1, /* Tag Fault Status Register (EL0) */ 390 391 /* 32bit specific registers. */ 392 DACR32_EL2, /* Domain Access Control Register */ 393 IFSR32_EL2, /* Instruction Fault Status Register */ 394 FPEXC32_EL2, /* Floating-Point Exception Control Register */ 395 DBGVCR32_EL2, /* Debug Vector Catch Register */ 396 397 /* EL2 registers */ 398 SCTLR_EL2, /* System Control Register (EL2) */ 399 ACTLR_EL2, /* Auxiliary Control Register (EL2) */ 400 MDCR_EL2, /* Monitor Debug Configuration Register (EL2) */ 401 CPTR_EL2, /* Architectural Feature Trap Register (EL2) */ 402 HACR_EL2, /* Hypervisor Auxiliary Control Register */ 403 TTBR0_EL2, /* Translation Table Base Register 0 (EL2) */ 404 TTBR1_EL2, /* Translation Table Base Register 1 (EL2) */ 405 TCR_EL2, /* Translation Control Register (EL2) */ 406 SPSR_EL2, /* EL2 saved program status register */ 407 ELR_EL2, /* EL2 exception link register */ 408 AFSR0_EL2, /* Auxiliary Fault Status Register 0 (EL2) */ 409 AFSR1_EL2, /* Auxiliary Fault Status Register 1 (EL2) */ 410 ESR_EL2, /* Exception Syndrome Register (EL2) */ 411 FAR_EL2, /* Fault Address Register (EL2) */ 412 HPFAR_EL2, /* Hypervisor IPA Fault Address Register */ 413 MAIR_EL2, /* Memory Attribute Indirection Register (EL2) */ 414 AMAIR_EL2, /* Auxiliary Memory Attribute Indirection Register (EL2) */ 415 VBAR_EL2, /* Vector Base Address Register (EL2) */ 416 RVBAR_EL2, /* Reset Vector Base Address Register */ 417 CONTEXTIDR_EL2, /* Context ID Register (EL2) */ 418 CNTHCTL_EL2, /* Counter-timer Hypervisor Control register */ 419 SP_EL2, /* EL2 Stack Pointer */ 420 CNTHP_CTL_EL2, 421 CNTHP_CVAL_EL2, 422 CNTHV_CTL_EL2, 423 CNTHV_CVAL_EL2, 424 425 __VNCR_START__, /* Any VNCR-capable reg goes after this point */ 426 427 VNCR(SCTLR_EL1),/* System Control Register */ 428 VNCR(ACTLR_EL1),/* Auxiliary Control Register */ 429 VNCR(CPACR_EL1),/* Coprocessor Access Control */ 430 VNCR(ZCR_EL1), /* SVE Control */ 431 VNCR(TTBR0_EL1),/* Translation Table Base Register 0 */ 432 VNCR(TTBR1_EL1),/* Translation Table Base Register 1 */ 433 VNCR(TCR_EL1), /* Translation Control Register */ 434 VNCR(TCR2_EL1), /* Extended Translation Control Register */ 435 VNCR(ESR_EL1), /* Exception Syndrome Register */ 436 VNCR(AFSR0_EL1),/* Auxiliary Fault Status Register 0 */ 437 VNCR(AFSR1_EL1),/* Auxiliary Fault Status Register 1 */ 438 VNCR(FAR_EL1), /* Fault Address Register */ 439 VNCR(MAIR_EL1), /* Memory Attribute Indirection Register */ 440 VNCR(VBAR_EL1), /* Vector Base Address Register */ 441 VNCR(CONTEXTIDR_EL1), /* Context ID Register */ 442 VNCR(AMAIR_EL1),/* Aux Memory Attribute Indirection Register */ 443 VNCR(MDSCR_EL1),/* Monitor Debug System Control Register */ 444 VNCR(ELR_EL1), 445 VNCR(SP_EL1), 446 VNCR(SPSR_EL1), 447 VNCR(TFSR_EL1), /* Tag Fault Status Register (EL1) */ 448 VNCR(VPIDR_EL2),/* Virtualization Processor ID Register */ 449 VNCR(VMPIDR_EL2),/* Virtualization Multiprocessor ID Register */ 450 VNCR(HCR_EL2), /* Hypervisor Configuration Register */ 451 VNCR(HSTR_EL2), /* Hypervisor System Trap Register */ 452 VNCR(VTTBR_EL2),/* Virtualization Translation Table Base Register */ 453 VNCR(VTCR_EL2), /* Virtualization Translation Control Register */ 454 VNCR(TPIDR_EL2),/* EL2 Software Thread ID Register */ 455 VNCR(HCRX_EL2), /* Extended Hypervisor Configuration Register */ 456 457 /* Permission Indirection Extension registers */ 458 VNCR(PIR_EL1), /* Permission Indirection Register 1 (EL1) */ 459 VNCR(PIRE0_EL1), /* Permission Indirection Register 0 (EL1) */ 460 461 VNCR(HFGRTR_EL2), 462 VNCR(HFGWTR_EL2), 463 VNCR(HFGITR_EL2), 464 VNCR(HDFGRTR_EL2), 465 VNCR(HDFGWTR_EL2), 466 VNCR(HAFGRTR_EL2), 467 468 VNCR(CNTVOFF_EL2), 469 VNCR(CNTV_CVAL_EL0), 470 VNCR(CNTV_CTL_EL0), 471 VNCR(CNTP_CVAL_EL0), 472 VNCR(CNTP_CTL_EL0), 473 474 NR_SYS_REGS /* Nothing after this line! */ 475 }; 476 477 struct kvm_cpu_context { 478 struct user_pt_regs regs; /* sp = sp_el0 */ 479 480 u64 spsr_abt; 481 u64 spsr_und; 482 u64 spsr_irq; 483 u64 spsr_fiq; 484 485 struct user_fpsimd_state fp_regs; 486 487 u64 sys_regs[NR_SYS_REGS]; 488 489 struct kvm_vcpu *__hyp_running_vcpu; 490 491 /* This pointer has to be 4kB aligned. */ 492 u64 *vncr_array; 493 }; 494 495 struct kvm_host_data { 496 struct kvm_cpu_context host_ctxt; 497 }; 498 499 struct kvm_host_psci_config { 500 /* PSCI version used by host. */ 501 u32 version; 502 u32 smccc_version; 503 504 /* Function IDs used by host if version is v0.1. */ 505 struct psci_0_1_function_ids function_ids_0_1; 506 507 bool psci_0_1_cpu_suspend_implemented; 508 bool psci_0_1_cpu_on_implemented; 509 bool psci_0_1_cpu_off_implemented; 510 bool psci_0_1_migrate_implemented; 511 }; 512 513 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config); 514 #define kvm_host_psci_config CHOOSE_NVHE_SYM(kvm_host_psci_config) 515 516 extern s64 kvm_nvhe_sym(hyp_physvirt_offset); 517 #define hyp_physvirt_offset CHOOSE_NVHE_SYM(hyp_physvirt_offset) 518 519 extern u64 kvm_nvhe_sym(hyp_cpu_logical_map)[NR_CPUS]; 520 #define hyp_cpu_logical_map CHOOSE_NVHE_SYM(hyp_cpu_logical_map) 521 522 struct vcpu_reset_state { 523 unsigned long pc; 524 unsigned long r0; 525 bool be; 526 bool reset; 527 }; 528 529 struct kvm_vcpu_arch { 530 struct kvm_cpu_context ctxt; 531 532 /* 533 * Guest floating point state 534 * 535 * The architecture has two main floating point extensions, 536 * the original FPSIMD and SVE. These have overlapping 537 * register views, with the FPSIMD V registers occupying the 538 * low 128 bits of the SVE Z registers. When the core 539 * floating point code saves the register state of a task it 540 * records which view it saved in fp_type. 541 */ 542 void *sve_state; 543 enum fp_type fp_type; 544 unsigned int sve_max_vl; 545 u64 svcr; 546 u64 fpmr; 547 548 /* Stage 2 paging state used by the hardware on next switch */ 549 struct kvm_s2_mmu *hw_mmu; 550 551 /* Values of trap registers for the guest. */ 552 u64 hcr_el2; 553 u64 mdcr_el2; 554 u64 cptr_el2; 555 556 /* Values of trap registers for the host before guest entry. */ 557 u64 mdcr_el2_host; 558 559 /* Exception Information */ 560 struct kvm_vcpu_fault_info fault; 561 562 /* Ownership of the FP regs */ 563 enum { 564 FP_STATE_FREE, 565 FP_STATE_HOST_OWNED, 566 FP_STATE_GUEST_OWNED, 567 } fp_state; 568 569 /* Configuration flags, set once and for all before the vcpu can run */ 570 u8 cflags; 571 572 /* Input flags to the hypervisor code, potentially cleared after use */ 573 u8 iflags; 574 575 /* State flags for kernel bookkeeping, unused by the hypervisor code */ 576 u8 sflags; 577 578 /* 579 * Don't run the guest (internal implementation need). 580 * 581 * Contrary to the flags above, this is set/cleared outside of 582 * a vcpu context, and thus cannot be mixed with the flags 583 * themselves (or the flag accesses need to be made atomic). 584 */ 585 bool pause; 586 587 /* 588 * We maintain more than a single set of debug registers to support 589 * debugging the guest from the host and to maintain separate host and 590 * guest state during world switches. vcpu_debug_state are the debug 591 * registers of the vcpu as the guest sees them. host_debug_state are 592 * the host registers which are saved and restored during 593 * world switches. external_debug_state contains the debug 594 * values we want to debug the guest. This is set via the 595 * KVM_SET_GUEST_DEBUG ioctl. 596 * 597 * debug_ptr points to the set of debug registers that should be loaded 598 * onto the hardware when running the guest. 599 */ 600 struct kvm_guest_debug_arch *debug_ptr; 601 struct kvm_guest_debug_arch vcpu_debug_state; 602 struct kvm_guest_debug_arch external_debug_state; 603 604 struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */ 605 struct task_struct *parent_task; 606 607 struct { 608 /* {Break,watch}point registers */ 609 struct kvm_guest_debug_arch regs; 610 /* Statistical profiling extension */ 611 u64 pmscr_el1; 612 /* Self-hosted trace */ 613 u64 trfcr_el1; 614 } host_debug_state; 615 616 /* VGIC state */ 617 struct vgic_cpu vgic_cpu; 618 struct arch_timer_cpu timer_cpu; 619 struct kvm_pmu pmu; 620 621 /* 622 * Guest registers we preserve during guest debugging. 623 * 624 * These shadow registers are updated by the kvm_handle_sys_reg 625 * trap handler if the guest accesses or updates them while we 626 * are using guest debug. 627 */ 628 struct { 629 u32 mdscr_el1; 630 bool pstate_ss; 631 } guest_debug_preserved; 632 633 /* vcpu power state */ 634 struct kvm_mp_state mp_state; 635 spinlock_t mp_state_lock; 636 637 /* Cache some mmu pages needed inside spinlock regions */ 638 struct kvm_mmu_memory_cache mmu_page_cache; 639 640 /* Virtual SError ESR to restore when HCR_EL2.VSE is set */ 641 u64 vsesr_el2; 642 643 /* Additional reset state */ 644 struct vcpu_reset_state reset_state; 645 646 /* Guest PV state */ 647 struct { 648 u64 last_steal; 649 gpa_t base; 650 } steal; 651 652 /* Per-vcpu CCSIDR override or NULL */ 653 u32 *ccsidr; 654 }; 655 656 /* 657 * Each 'flag' is composed of a comma-separated triplet: 658 * 659 * - the flag-set it belongs to in the vcpu->arch structure 660 * - the value for that flag 661 * - the mask for that flag 662 * 663 * __vcpu_single_flag() builds such a triplet for a single-bit flag. 664 * unpack_vcpu_flag() extract the flag value from the triplet for 665 * direct use outside of the flag accessors. 666 */ 667 #define __vcpu_single_flag(_set, _f) _set, (_f), (_f) 668 669 #define __unpack_flag(_set, _f, _m) _f 670 #define unpack_vcpu_flag(...) __unpack_flag(__VA_ARGS__) 671 672 #define __build_check_flag(v, flagset, f, m) \ 673 do { \ 674 typeof(v->arch.flagset) *_fset; \ 675 \ 676 /* Check that the flags fit in the mask */ \ 677 BUILD_BUG_ON(HWEIGHT(m) != HWEIGHT((f) | (m))); \ 678 /* Check that the flags fit in the type */ \ 679 BUILD_BUG_ON((sizeof(*_fset) * 8) <= __fls(m)); \ 680 } while (0) 681 682 #define __vcpu_get_flag(v, flagset, f, m) \ 683 ({ \ 684 __build_check_flag(v, flagset, f, m); \ 685 \ 686 READ_ONCE(v->arch.flagset) & (m); \ 687 }) 688 689 /* 690 * Note that the set/clear accessors must be preempt-safe in order to 691 * avoid nesting them with load/put which also manipulate flags... 692 */ 693 #ifdef __KVM_NVHE_HYPERVISOR__ 694 /* the nVHE hypervisor is always non-preemptible */ 695 #define __vcpu_flags_preempt_disable() 696 #define __vcpu_flags_preempt_enable() 697 #else 698 #define __vcpu_flags_preempt_disable() preempt_disable() 699 #define __vcpu_flags_preempt_enable() preempt_enable() 700 #endif 701 702 #define __vcpu_set_flag(v, flagset, f, m) \ 703 do { \ 704 typeof(v->arch.flagset) *fset; \ 705 \ 706 __build_check_flag(v, flagset, f, m); \ 707 \ 708 fset = &v->arch.flagset; \ 709 __vcpu_flags_preempt_disable(); \ 710 if (HWEIGHT(m) > 1) \ 711 *fset &= ~(m); \ 712 *fset |= (f); \ 713 __vcpu_flags_preempt_enable(); \ 714 } while (0) 715 716 #define __vcpu_clear_flag(v, flagset, f, m) \ 717 do { \ 718 typeof(v->arch.flagset) *fset; \ 719 \ 720 __build_check_flag(v, flagset, f, m); \ 721 \ 722 fset = &v->arch.flagset; \ 723 __vcpu_flags_preempt_disable(); \ 724 *fset &= ~(m); \ 725 __vcpu_flags_preempt_enable(); \ 726 } while (0) 727 728 #define vcpu_get_flag(v, ...) __vcpu_get_flag((v), __VA_ARGS__) 729 #define vcpu_set_flag(v, ...) __vcpu_set_flag((v), __VA_ARGS__) 730 #define vcpu_clear_flag(v, ...) __vcpu_clear_flag((v), __VA_ARGS__) 731 732 /* SVE exposed to guest */ 733 #define GUEST_HAS_SVE __vcpu_single_flag(cflags, BIT(0)) 734 /* SVE config completed */ 735 #define VCPU_SVE_FINALIZED __vcpu_single_flag(cflags, BIT(1)) 736 /* PTRAUTH exposed to guest */ 737 #define GUEST_HAS_PTRAUTH __vcpu_single_flag(cflags, BIT(2)) 738 /* KVM_ARM_VCPU_INIT completed */ 739 #define VCPU_INITIALIZED __vcpu_single_flag(cflags, BIT(3)) 740 741 /* Exception pending */ 742 #define PENDING_EXCEPTION __vcpu_single_flag(iflags, BIT(0)) 743 /* 744 * PC increment. Overlaps with EXCEPT_MASK on purpose so that it can't 745 * be set together with an exception... 746 */ 747 #define INCREMENT_PC __vcpu_single_flag(iflags, BIT(1)) 748 /* Target EL/MODE (not a single flag, but let's abuse the macro) */ 749 #define EXCEPT_MASK __vcpu_single_flag(iflags, GENMASK(3, 1)) 750 751 /* Helpers to encode exceptions with minimum fuss */ 752 #define __EXCEPT_MASK_VAL unpack_vcpu_flag(EXCEPT_MASK) 753 #define __EXCEPT_SHIFT __builtin_ctzl(__EXCEPT_MASK_VAL) 754 #define __vcpu_except_flags(_f) iflags, (_f << __EXCEPT_SHIFT), __EXCEPT_MASK_VAL 755 756 /* 757 * When PENDING_EXCEPTION is set, EXCEPT_MASK can take the following 758 * values: 759 * 760 * For AArch32 EL1: 761 */ 762 #define EXCEPT_AA32_UND __vcpu_except_flags(0) 763 #define EXCEPT_AA32_IABT __vcpu_except_flags(1) 764 #define EXCEPT_AA32_DABT __vcpu_except_flags(2) 765 /* For AArch64: */ 766 #define EXCEPT_AA64_EL1_SYNC __vcpu_except_flags(0) 767 #define EXCEPT_AA64_EL1_IRQ __vcpu_except_flags(1) 768 #define EXCEPT_AA64_EL1_FIQ __vcpu_except_flags(2) 769 #define EXCEPT_AA64_EL1_SERR __vcpu_except_flags(3) 770 /* For AArch64 with NV: */ 771 #define EXCEPT_AA64_EL2_SYNC __vcpu_except_flags(4) 772 #define EXCEPT_AA64_EL2_IRQ __vcpu_except_flags(5) 773 #define EXCEPT_AA64_EL2_FIQ __vcpu_except_flags(6) 774 #define EXCEPT_AA64_EL2_SERR __vcpu_except_flags(7) 775 /* Guest debug is live */ 776 #define DEBUG_DIRTY __vcpu_single_flag(iflags, BIT(4)) 777 /* Save SPE context if active */ 778 #define DEBUG_STATE_SAVE_SPE __vcpu_single_flag(iflags, BIT(5)) 779 /* Save TRBE context if active */ 780 #define DEBUG_STATE_SAVE_TRBE __vcpu_single_flag(iflags, BIT(6)) 781 /* vcpu running in HYP context */ 782 #define VCPU_HYP_CONTEXT __vcpu_single_flag(iflags, BIT(7)) 783 784 /* SVE enabled for host EL0 */ 785 #define HOST_SVE_ENABLED __vcpu_single_flag(sflags, BIT(0)) 786 /* SME enabled for EL0 */ 787 #define HOST_SME_ENABLED __vcpu_single_flag(sflags, BIT(1)) 788 /* Physical CPU not in supported_cpus */ 789 #define ON_UNSUPPORTED_CPU __vcpu_single_flag(sflags, BIT(2)) 790 /* WFIT instruction trapped */ 791 #define IN_WFIT __vcpu_single_flag(sflags, BIT(3)) 792 /* vcpu system registers loaded on physical CPU */ 793 #define SYSREGS_ON_CPU __vcpu_single_flag(sflags, BIT(4)) 794 /* Software step state is Active-pending */ 795 #define DBG_SS_ACTIVE_PENDING __vcpu_single_flag(sflags, BIT(5)) 796 /* PMUSERENR for the guest EL0 is on physical CPU */ 797 #define PMUSERENR_ON_CPU __vcpu_single_flag(sflags, BIT(6)) 798 /* WFI instruction trapped */ 799 #define IN_WFI __vcpu_single_flag(sflags, BIT(7)) 800 801 802 /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */ 803 #define vcpu_sve_pffr(vcpu) (kern_hyp_va((vcpu)->arch.sve_state) + \ 804 sve_ffr_offset((vcpu)->arch.sve_max_vl)) 805 806 #define vcpu_sve_max_vq(vcpu) sve_vq_from_vl((vcpu)->arch.sve_max_vl) 807 808 #define vcpu_sve_state_size(vcpu) ({ \ 809 size_t __size_ret; \ 810 unsigned int __vcpu_vq; \ 811 \ 812 if (WARN_ON(!sve_vl_valid((vcpu)->arch.sve_max_vl))) { \ 813 __size_ret = 0; \ 814 } else { \ 815 __vcpu_vq = vcpu_sve_max_vq(vcpu); \ 816 __size_ret = SVE_SIG_REGS_SIZE(__vcpu_vq); \ 817 } \ 818 \ 819 __size_ret; \ 820 }) 821 822 #define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE | \ 823 KVM_GUESTDBG_USE_SW_BP | \ 824 KVM_GUESTDBG_USE_HW | \ 825 KVM_GUESTDBG_SINGLESTEP) 826 827 #define vcpu_has_sve(vcpu) (system_supports_sve() && \ 828 vcpu_get_flag(vcpu, GUEST_HAS_SVE)) 829 830 #ifdef CONFIG_ARM64_PTR_AUTH 831 #define vcpu_has_ptrauth(vcpu) \ 832 ((cpus_have_final_cap(ARM64_HAS_ADDRESS_AUTH) || \ 833 cpus_have_final_cap(ARM64_HAS_GENERIC_AUTH)) && \ 834 vcpu_get_flag(vcpu, GUEST_HAS_PTRAUTH)) 835 #else 836 #define vcpu_has_ptrauth(vcpu) false 837 #endif 838 839 #define vcpu_on_unsupported_cpu(vcpu) \ 840 vcpu_get_flag(vcpu, ON_UNSUPPORTED_CPU) 841 842 #define vcpu_set_on_unsupported_cpu(vcpu) \ 843 vcpu_set_flag(vcpu, ON_UNSUPPORTED_CPU) 844 845 #define vcpu_clear_on_unsupported_cpu(vcpu) \ 846 vcpu_clear_flag(vcpu, ON_UNSUPPORTED_CPU) 847 848 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.regs) 849 850 /* 851 * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the 852 * memory backed version of a register, and not the one most recently 853 * accessed by a running VCPU. For example, for userspace access or 854 * for system registers that are never context switched, but only 855 * emulated. 856 * 857 * Don't bother with VNCR-based accesses in the nVHE code, it has no 858 * business dealing with NV. 859 */ 860 static inline u64 *__ctxt_sys_reg(const struct kvm_cpu_context *ctxt, int r) 861 { 862 #if !defined (__KVM_NVHE_HYPERVISOR__) 863 if (unlikely(cpus_have_final_cap(ARM64_HAS_NESTED_VIRT) && 864 r >= __VNCR_START__ && ctxt->vncr_array)) 865 return &ctxt->vncr_array[r - __VNCR_START__]; 866 #endif 867 return (u64 *)&ctxt->sys_regs[r]; 868 } 869 870 #define ctxt_sys_reg(c,r) (*__ctxt_sys_reg(c,r)) 871 872 #define __vcpu_sys_reg(v,r) (ctxt_sys_reg(&(v)->arch.ctxt, (r))) 873 874 u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg); 875 void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg); 876 877 static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val) 878 { 879 /* 880 * *** VHE ONLY *** 881 * 882 * System registers listed in the switch are not saved on every 883 * exit from the guest but are only saved on vcpu_put. 884 * 885 * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but 886 * should never be listed below, because the guest cannot modify its 887 * own MPIDR_EL1 and MPIDR_EL1 is accessed for VCPU A from VCPU B's 888 * thread when emulating cross-VCPU communication. 889 */ 890 if (!has_vhe()) 891 return false; 892 893 switch (reg) { 894 case SCTLR_EL1: *val = read_sysreg_s(SYS_SCTLR_EL12); break; 895 case CPACR_EL1: *val = read_sysreg_s(SYS_CPACR_EL12); break; 896 case TTBR0_EL1: *val = read_sysreg_s(SYS_TTBR0_EL12); break; 897 case TTBR1_EL1: *val = read_sysreg_s(SYS_TTBR1_EL12); break; 898 case TCR_EL1: *val = read_sysreg_s(SYS_TCR_EL12); break; 899 case ESR_EL1: *val = read_sysreg_s(SYS_ESR_EL12); break; 900 case AFSR0_EL1: *val = read_sysreg_s(SYS_AFSR0_EL12); break; 901 case AFSR1_EL1: *val = read_sysreg_s(SYS_AFSR1_EL12); break; 902 case FAR_EL1: *val = read_sysreg_s(SYS_FAR_EL12); break; 903 case MAIR_EL1: *val = read_sysreg_s(SYS_MAIR_EL12); break; 904 case VBAR_EL1: *val = read_sysreg_s(SYS_VBAR_EL12); break; 905 case CONTEXTIDR_EL1: *val = read_sysreg_s(SYS_CONTEXTIDR_EL12);break; 906 case TPIDR_EL0: *val = read_sysreg_s(SYS_TPIDR_EL0); break; 907 case TPIDRRO_EL0: *val = read_sysreg_s(SYS_TPIDRRO_EL0); break; 908 case TPIDR_EL1: *val = read_sysreg_s(SYS_TPIDR_EL1); break; 909 case AMAIR_EL1: *val = read_sysreg_s(SYS_AMAIR_EL12); break; 910 case CNTKCTL_EL1: *val = read_sysreg_s(SYS_CNTKCTL_EL12); break; 911 case ELR_EL1: *val = read_sysreg_s(SYS_ELR_EL12); break; 912 case SPSR_EL1: *val = read_sysreg_s(SYS_SPSR_EL12); break; 913 case PAR_EL1: *val = read_sysreg_par(); break; 914 case DACR32_EL2: *val = read_sysreg_s(SYS_DACR32_EL2); break; 915 case IFSR32_EL2: *val = read_sysreg_s(SYS_IFSR32_EL2); break; 916 case DBGVCR32_EL2: *val = read_sysreg_s(SYS_DBGVCR32_EL2); break; 917 default: return false; 918 } 919 920 return true; 921 } 922 923 static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) 924 { 925 /* 926 * *** VHE ONLY *** 927 * 928 * System registers listed in the switch are not restored on every 929 * entry to the guest but are only restored on vcpu_load. 930 * 931 * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but 932 * should never be listed below, because the MPIDR should only be set 933 * once, before running the VCPU, and never changed later. 934 */ 935 if (!has_vhe()) 936 return false; 937 938 switch (reg) { 939 case SCTLR_EL1: write_sysreg_s(val, SYS_SCTLR_EL12); break; 940 case CPACR_EL1: write_sysreg_s(val, SYS_CPACR_EL12); break; 941 case TTBR0_EL1: write_sysreg_s(val, SYS_TTBR0_EL12); break; 942 case TTBR1_EL1: write_sysreg_s(val, SYS_TTBR1_EL12); break; 943 case TCR_EL1: write_sysreg_s(val, SYS_TCR_EL12); break; 944 case ESR_EL1: write_sysreg_s(val, SYS_ESR_EL12); break; 945 case AFSR0_EL1: write_sysreg_s(val, SYS_AFSR0_EL12); break; 946 case AFSR1_EL1: write_sysreg_s(val, SYS_AFSR1_EL12); break; 947 case FAR_EL1: write_sysreg_s(val, SYS_FAR_EL12); break; 948 case MAIR_EL1: write_sysreg_s(val, SYS_MAIR_EL12); break; 949 case VBAR_EL1: write_sysreg_s(val, SYS_VBAR_EL12); break; 950 case CONTEXTIDR_EL1: write_sysreg_s(val, SYS_CONTEXTIDR_EL12);break; 951 case TPIDR_EL0: write_sysreg_s(val, SYS_TPIDR_EL0); break; 952 case TPIDRRO_EL0: write_sysreg_s(val, SYS_TPIDRRO_EL0); break; 953 case TPIDR_EL1: write_sysreg_s(val, SYS_TPIDR_EL1); break; 954 case AMAIR_EL1: write_sysreg_s(val, SYS_AMAIR_EL12); break; 955 case CNTKCTL_EL1: write_sysreg_s(val, SYS_CNTKCTL_EL12); break; 956 case ELR_EL1: write_sysreg_s(val, SYS_ELR_EL12); break; 957 case SPSR_EL1: write_sysreg_s(val, SYS_SPSR_EL12); break; 958 case PAR_EL1: write_sysreg_s(val, SYS_PAR_EL1); break; 959 case DACR32_EL2: write_sysreg_s(val, SYS_DACR32_EL2); break; 960 case IFSR32_EL2: write_sysreg_s(val, SYS_IFSR32_EL2); break; 961 case DBGVCR32_EL2: write_sysreg_s(val, SYS_DBGVCR32_EL2); break; 962 default: return false; 963 } 964 965 return true; 966 } 967 968 struct kvm_vm_stat { 969 struct kvm_vm_stat_generic generic; 970 }; 971 972 struct kvm_vcpu_stat { 973 struct kvm_vcpu_stat_generic generic; 974 u64 hvc_exit_stat; 975 u64 wfe_exit_stat; 976 u64 wfi_exit_stat; 977 u64 mmio_exit_user; 978 u64 mmio_exit_kernel; 979 u64 signal_exits; 980 u64 exits; 981 }; 982 983 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 984 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 985 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 986 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 987 988 unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu); 989 int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); 990 991 int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, 992 struct kvm_vcpu_events *events); 993 994 int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, 995 struct kvm_vcpu_events *events); 996 997 void kvm_arm_halt_guest(struct kvm *kvm); 998 void kvm_arm_resume_guest(struct kvm *kvm); 999 1000 #define vcpu_has_run_once(vcpu) !!rcu_access_pointer((vcpu)->pid) 1001 1002 #ifndef __KVM_NVHE_HYPERVISOR__ 1003 #define kvm_call_hyp_nvhe(f, ...) \ 1004 ({ \ 1005 struct arm_smccc_res res; \ 1006 \ 1007 arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(f), \ 1008 ##__VA_ARGS__, &res); \ 1009 WARN_ON(res.a0 != SMCCC_RET_SUCCESS); \ 1010 \ 1011 res.a1; \ 1012 }) 1013 1014 /* 1015 * The couple of isb() below are there to guarantee the same behaviour 1016 * on VHE as on !VHE, where the eret to EL1 acts as a context 1017 * synchronization event. 1018 */ 1019 #define kvm_call_hyp(f, ...) \ 1020 do { \ 1021 if (has_vhe()) { \ 1022 f(__VA_ARGS__); \ 1023 isb(); \ 1024 } else { \ 1025 kvm_call_hyp_nvhe(f, ##__VA_ARGS__); \ 1026 } \ 1027 } while(0) 1028 1029 #define kvm_call_hyp_ret(f, ...) \ 1030 ({ \ 1031 typeof(f(__VA_ARGS__)) ret; \ 1032 \ 1033 if (has_vhe()) { \ 1034 ret = f(__VA_ARGS__); \ 1035 isb(); \ 1036 } else { \ 1037 ret = kvm_call_hyp_nvhe(f, ##__VA_ARGS__); \ 1038 } \ 1039 \ 1040 ret; \ 1041 }) 1042 #else /* __KVM_NVHE_HYPERVISOR__ */ 1043 #define kvm_call_hyp(f, ...) f(__VA_ARGS__) 1044 #define kvm_call_hyp_ret(f, ...) f(__VA_ARGS__) 1045 #define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__) 1046 #endif /* __KVM_NVHE_HYPERVISOR__ */ 1047 1048 int handle_exit(struct kvm_vcpu *vcpu, int exception_index); 1049 void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index); 1050 1051 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu); 1052 int kvm_handle_cp14_32(struct kvm_vcpu *vcpu); 1053 int kvm_handle_cp14_64(struct kvm_vcpu *vcpu); 1054 int kvm_handle_cp15_32(struct kvm_vcpu *vcpu); 1055 int kvm_handle_cp15_64(struct kvm_vcpu *vcpu); 1056 int kvm_handle_sys_reg(struct kvm_vcpu *vcpu); 1057 int kvm_handle_cp10_id(struct kvm_vcpu *vcpu); 1058 1059 void kvm_reset_sys_regs(struct kvm_vcpu *vcpu); 1060 1061 int __init kvm_sys_reg_table_init(void); 1062 int __init populate_nv_trap_config(void); 1063 1064 bool lock_all_vcpus(struct kvm *kvm); 1065 void unlock_all_vcpus(struct kvm *kvm); 1066 1067 /* MMIO helpers */ 1068 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data); 1069 unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len); 1070 1071 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu); 1072 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa); 1073 1074 /* 1075 * Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event, 1076 * arrived in guest context. For arm64, any event that arrives while a vCPU is 1077 * loaded is considered to be "in guest". 1078 */ 1079 static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) 1080 { 1081 return IS_ENABLED(CONFIG_GUEST_PERF_EVENTS) && !!vcpu; 1082 } 1083 1084 long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu); 1085 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu); 1086 void kvm_update_stolen_time(struct kvm_vcpu *vcpu); 1087 1088 bool kvm_arm_pvtime_supported(void); 1089 int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu, 1090 struct kvm_device_attr *attr); 1091 int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu, 1092 struct kvm_device_attr *attr); 1093 int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu, 1094 struct kvm_device_attr *attr); 1095 1096 extern unsigned int __ro_after_init kvm_arm_vmid_bits; 1097 int __init kvm_arm_vmid_alloc_init(void); 1098 void __init kvm_arm_vmid_alloc_free(void); 1099 bool kvm_arm_vmid_update(struct kvm_vmid *kvm_vmid); 1100 void kvm_arm_vmid_clear_active(void); 1101 1102 static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch) 1103 { 1104 vcpu_arch->steal.base = INVALID_GPA; 1105 } 1106 1107 static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch) 1108 { 1109 return (vcpu_arch->steal.base != INVALID_GPA); 1110 } 1111 1112 void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome); 1113 1114 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 1115 1116 DECLARE_KVM_HYP_PER_CPU(struct kvm_host_data, kvm_host_data); 1117 1118 static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt) 1119 { 1120 /* The host's MPIDR is immutable, so let's set it up at boot time */ 1121 ctxt_sys_reg(cpu_ctxt, MPIDR_EL1) = read_cpuid_mpidr(); 1122 } 1123 1124 static inline bool kvm_system_needs_idmapped_vectors(void) 1125 { 1126 return cpus_have_final_cap(ARM64_SPECTRE_V3A); 1127 } 1128 1129 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 1130 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 1131 1132 void kvm_arm_init_debug(void); 1133 void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu); 1134 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); 1135 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); 1136 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); 1137 1138 #define kvm_vcpu_os_lock_enabled(vcpu) \ 1139 (!!(__vcpu_sys_reg(vcpu, OSLSR_EL1) & OSLSR_EL1_OSLK)) 1140 1141 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu, 1142 struct kvm_device_attr *attr); 1143 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu, 1144 struct kvm_device_attr *attr); 1145 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu, 1146 struct kvm_device_attr *attr); 1147 1148 int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, 1149 struct kvm_arm_copy_mte_tags *copy_tags); 1150 int kvm_vm_ioctl_set_counter_offset(struct kvm *kvm, 1151 struct kvm_arm_counter_offset *offset); 1152 int kvm_vm_ioctl_get_reg_writable_masks(struct kvm *kvm, 1153 struct reg_mask_range *range); 1154 1155 /* Guest/host FPSIMD coordination helpers */ 1156 int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu); 1157 void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu); 1158 void kvm_arch_vcpu_ctxflush_fp(struct kvm_vcpu *vcpu); 1159 void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu); 1160 void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu); 1161 void kvm_vcpu_unshare_task_fp(struct kvm_vcpu *vcpu); 1162 1163 static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr) 1164 { 1165 return (!has_vhe() && attr->exclude_host); 1166 } 1167 1168 /* Flags for host debug state */ 1169 void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu); 1170 void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu); 1171 1172 #ifdef CONFIG_KVM 1173 void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr); 1174 void kvm_clr_pmu_events(u32 clr); 1175 bool kvm_set_pmuserenr(u64 val); 1176 #else 1177 static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} 1178 static inline void kvm_clr_pmu_events(u32 clr) {} 1179 static inline bool kvm_set_pmuserenr(u64 val) 1180 { 1181 return false; 1182 } 1183 #endif 1184 1185 void kvm_vcpu_load_vhe(struct kvm_vcpu *vcpu); 1186 void kvm_vcpu_put_vhe(struct kvm_vcpu *vcpu); 1187 1188 int __init kvm_set_ipa_limit(void); 1189 1190 #define __KVM_HAVE_ARCH_VM_ALLOC 1191 struct kvm *kvm_arch_alloc_vm(void); 1192 1193 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS 1194 1195 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE 1196 1197 static inline bool kvm_vm_is_protected(struct kvm *kvm) 1198 { 1199 return false; 1200 } 1201 1202 int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature); 1203 bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu); 1204 1205 #define kvm_arm_vcpu_sve_finalized(vcpu) vcpu_get_flag(vcpu, VCPU_SVE_FINALIZED) 1206 1207 #define kvm_has_mte(kvm) \ 1208 (system_supports_mte() && \ 1209 test_bit(KVM_ARCH_FLAG_MTE_ENABLED, &(kvm)->arch.flags)) 1210 1211 #define kvm_supports_32bit_el0() \ 1212 (system_supports_32bit_el0() && \ 1213 !static_branch_unlikely(&arm64_mismatched_32bit_el0)) 1214 1215 #define kvm_vm_has_ran_once(kvm) \ 1216 (test_bit(KVM_ARCH_FLAG_HAS_RAN_ONCE, &(kvm)->arch.flags)) 1217 1218 static inline bool __vcpu_has_feature(const struct kvm_arch *ka, int feature) 1219 { 1220 return test_bit(feature, ka->vcpu_features); 1221 } 1222 1223 #define vcpu_has_feature(v, f) __vcpu_has_feature(&(v)->kvm->arch, (f)) 1224 1225 int kvm_trng_call(struct kvm_vcpu *vcpu); 1226 #ifdef CONFIG_KVM 1227 extern phys_addr_t hyp_mem_base; 1228 extern phys_addr_t hyp_mem_size; 1229 void __init kvm_hyp_reserve(void); 1230 #else 1231 static inline void kvm_hyp_reserve(void) { } 1232 #endif 1233 1234 void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu); 1235 bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu); 1236 1237 #endif /* __ARM64_KVM_HOST_H__ */ 1238