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/percpu.h> 20 #include <linux/psci.h> 21 #include <asm/arch_gicv3.h> 22 #include <asm/barrier.h> 23 #include <asm/cpufeature.h> 24 #include <asm/cputype.h> 25 #include <asm/daifflags.h> 26 #include <asm/fpsimd.h> 27 #include <asm/kvm.h> 28 #include <asm/kvm_asm.h> 29 30 #define __KVM_HAVE_ARCH_INTC_INITIALIZED 31 32 #define KVM_HALT_POLL_NS_DEFAULT 500000 33 34 #include <kvm/arm_vgic.h> 35 #include <kvm/arm_arch_timer.h> 36 #include <kvm/arm_pmu.h> 37 38 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS 39 40 #define KVM_VCPU_MAX_FEATURES 7 41 42 #define KVM_REQ_SLEEP \ 43 KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 44 #define KVM_REQ_IRQ_PENDING KVM_ARCH_REQ(1) 45 #define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(2) 46 #define KVM_REQ_RECORD_STEAL KVM_ARCH_REQ(3) 47 #define KVM_REQ_RELOAD_GICv4 KVM_ARCH_REQ(4) 48 #define KVM_REQ_RELOAD_PMU KVM_ARCH_REQ(5) 49 #define KVM_REQ_SUSPEND KVM_ARCH_REQ(6) 50 51 #define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ 52 KVM_DIRTY_LOG_INITIALLY_SET) 53 54 #define KVM_HAVE_MMU_RWLOCK 55 56 /* 57 * Mode of operation configurable with kvm-arm.mode early param. 58 * See Documentation/admin-guide/kernel-parameters.txt for more information. 59 */ 60 enum kvm_mode { 61 KVM_MODE_DEFAULT, 62 KVM_MODE_PROTECTED, 63 KVM_MODE_NONE, 64 }; 65 enum kvm_mode kvm_get_mode(void); 66 67 DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use); 68 69 extern unsigned int kvm_sve_max_vl; 70 int kvm_arm_init_sve(void); 71 72 u32 __attribute_const__ kvm_target_cpu(void); 73 int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 74 void kvm_arm_vcpu_destroy(struct kvm_vcpu *vcpu); 75 76 struct kvm_vmid { 77 atomic64_t id; 78 }; 79 80 struct kvm_s2_mmu { 81 struct kvm_vmid vmid; 82 83 /* 84 * stage2 entry level table 85 * 86 * Two kvm_s2_mmu structures in the same VM can point to the same 87 * pgd here. This happens when running a guest using a 88 * translation regime that isn't affected by its own stage-2 89 * translation, such as a non-VHE hypervisor running at vEL2, or 90 * for vEL1/EL0 with vHCR_EL2.VM == 0. In that case, we use the 91 * canonical stage-2 page tables. 92 */ 93 phys_addr_t pgd_phys; 94 struct kvm_pgtable *pgt; 95 96 /* The last vcpu id that ran on each physical CPU */ 97 int __percpu *last_vcpu_ran; 98 99 struct kvm_arch *arch; 100 }; 101 102 struct kvm_arch_memory_slot { 103 }; 104 105 /** 106 * struct kvm_smccc_features: Descriptor of the hypercall services exposed to the guests 107 * 108 * @std_bmap: Bitmap of standard secure service calls 109 * @std_hyp_bmap: Bitmap of standard hypervisor service calls 110 * @vendor_hyp_bmap: Bitmap of vendor specific hypervisor service calls 111 */ 112 struct kvm_smccc_features { 113 unsigned long std_bmap; 114 unsigned long std_hyp_bmap; 115 unsigned long vendor_hyp_bmap; 116 }; 117 118 struct kvm_arch { 119 struct kvm_s2_mmu mmu; 120 121 /* VTCR_EL2 value for this VM */ 122 u64 vtcr; 123 124 /* Interrupt controller */ 125 struct vgic_dist vgic; 126 127 /* Mandated version of PSCI */ 128 u32 psci_version; 129 130 /* 131 * If we encounter a data abort without valid instruction syndrome 132 * information, report this to user space. User space can (and 133 * should) opt in to this feature if KVM_CAP_ARM_NISV_TO_USER is 134 * supported. 135 */ 136 #define KVM_ARCH_FLAG_RETURN_NISV_IO_ABORT_TO_USER 0 137 /* Memory Tagging Extension enabled for the guest */ 138 #define KVM_ARCH_FLAG_MTE_ENABLED 1 139 /* At least one vCPU has ran in the VM */ 140 #define KVM_ARCH_FLAG_HAS_RAN_ONCE 2 141 /* 142 * The following two bits are used to indicate the guest's EL1 143 * register width configuration. A value of KVM_ARCH_FLAG_EL1_32BIT 144 * bit is valid only when KVM_ARCH_FLAG_REG_WIDTH_CONFIGURED is set. 145 * Otherwise, the guest's EL1 register width has not yet been 146 * determined yet. 147 */ 148 #define KVM_ARCH_FLAG_REG_WIDTH_CONFIGURED 3 149 #define KVM_ARCH_FLAG_EL1_32BIT 4 150 /* PSCI SYSTEM_SUSPEND enabled for the guest */ 151 #define KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED 5 152 153 unsigned long flags; 154 155 /* 156 * VM-wide PMU filter, implemented as a bitmap and big enough for 157 * up to 2^10 events (ARMv8.0) or 2^16 events (ARMv8.1+). 158 */ 159 unsigned long *pmu_filter; 160 struct arm_pmu *arm_pmu; 161 162 cpumask_var_t supported_cpus; 163 164 u8 pfr0_csv2; 165 u8 pfr0_csv3; 166 167 /* Hypercall features firmware registers' descriptor */ 168 struct kvm_smccc_features smccc_feat; 169 }; 170 171 struct kvm_vcpu_fault_info { 172 u64 esr_el2; /* Hyp Syndrom Register */ 173 u64 far_el2; /* Hyp Fault Address Register */ 174 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 175 u64 disr_el1; /* Deferred [SError] Status Register */ 176 }; 177 178 enum vcpu_sysreg { 179 __INVALID_SYSREG__, /* 0 is reserved as an invalid value */ 180 MPIDR_EL1, /* MultiProcessor Affinity Register */ 181 CSSELR_EL1, /* Cache Size Selection Register */ 182 SCTLR_EL1, /* System Control Register */ 183 ACTLR_EL1, /* Auxiliary Control Register */ 184 CPACR_EL1, /* Coprocessor Access Control */ 185 ZCR_EL1, /* SVE Control */ 186 TTBR0_EL1, /* Translation Table Base Register 0 */ 187 TTBR1_EL1, /* Translation Table Base Register 1 */ 188 TCR_EL1, /* Translation Control Register */ 189 ESR_EL1, /* Exception Syndrome Register */ 190 AFSR0_EL1, /* Auxiliary Fault Status Register 0 */ 191 AFSR1_EL1, /* Auxiliary Fault Status Register 1 */ 192 FAR_EL1, /* Fault Address Register */ 193 MAIR_EL1, /* Memory Attribute Indirection Register */ 194 VBAR_EL1, /* Vector Base Address Register */ 195 CONTEXTIDR_EL1, /* Context ID Register */ 196 TPIDR_EL0, /* Thread ID, User R/W */ 197 TPIDRRO_EL0, /* Thread ID, User R/O */ 198 TPIDR_EL1, /* Thread ID, Privileged */ 199 AMAIR_EL1, /* Aux Memory Attribute Indirection Register */ 200 CNTKCTL_EL1, /* Timer Control Register (EL1) */ 201 PAR_EL1, /* Physical Address Register */ 202 MDSCR_EL1, /* Monitor Debug System Control Register */ 203 MDCCINT_EL1, /* Monitor Debug Comms Channel Interrupt Enable Reg */ 204 OSLSR_EL1, /* OS Lock Status Register */ 205 DISR_EL1, /* Deferred Interrupt Status Register */ 206 207 /* Performance Monitors Registers */ 208 PMCR_EL0, /* Control Register */ 209 PMSELR_EL0, /* Event Counter Selection Register */ 210 PMEVCNTR0_EL0, /* Event Counter Register (0-30) */ 211 PMEVCNTR30_EL0 = PMEVCNTR0_EL0 + 30, 212 PMCCNTR_EL0, /* Cycle Counter Register */ 213 PMEVTYPER0_EL0, /* Event Type Register (0-30) */ 214 PMEVTYPER30_EL0 = PMEVTYPER0_EL0 + 30, 215 PMCCFILTR_EL0, /* Cycle Count Filter Register */ 216 PMCNTENSET_EL0, /* Count Enable Set Register */ 217 PMINTENSET_EL1, /* Interrupt Enable Set Register */ 218 PMOVSSET_EL0, /* Overflow Flag Status Set Register */ 219 PMUSERENR_EL0, /* User Enable Register */ 220 221 /* Pointer Authentication Registers in a strict increasing order. */ 222 APIAKEYLO_EL1, 223 APIAKEYHI_EL1, 224 APIBKEYLO_EL1, 225 APIBKEYHI_EL1, 226 APDAKEYLO_EL1, 227 APDAKEYHI_EL1, 228 APDBKEYLO_EL1, 229 APDBKEYHI_EL1, 230 APGAKEYLO_EL1, 231 APGAKEYHI_EL1, 232 233 ELR_EL1, 234 SP_EL1, 235 SPSR_EL1, 236 237 CNTVOFF_EL2, 238 CNTV_CVAL_EL0, 239 CNTV_CTL_EL0, 240 CNTP_CVAL_EL0, 241 CNTP_CTL_EL0, 242 243 /* Memory Tagging Extension registers */ 244 RGSR_EL1, /* Random Allocation Tag Seed Register */ 245 GCR_EL1, /* Tag Control Register */ 246 TFSR_EL1, /* Tag Fault Status Register (EL1) */ 247 TFSRE0_EL1, /* Tag Fault Status Register (EL0) */ 248 249 /* 32bit specific registers. Keep them at the end of the range */ 250 DACR32_EL2, /* Domain Access Control Register */ 251 IFSR32_EL2, /* Instruction Fault Status Register */ 252 FPEXC32_EL2, /* Floating-Point Exception Control Register */ 253 DBGVCR32_EL2, /* Debug Vector Catch Register */ 254 255 NR_SYS_REGS /* Nothing after this line! */ 256 }; 257 258 struct kvm_cpu_context { 259 struct user_pt_regs regs; /* sp = sp_el0 */ 260 261 u64 spsr_abt; 262 u64 spsr_und; 263 u64 spsr_irq; 264 u64 spsr_fiq; 265 266 struct user_fpsimd_state fp_regs; 267 268 u64 sys_regs[NR_SYS_REGS]; 269 270 struct kvm_vcpu *__hyp_running_vcpu; 271 }; 272 273 struct kvm_host_data { 274 struct kvm_cpu_context host_ctxt; 275 }; 276 277 struct kvm_host_psci_config { 278 /* PSCI version used by host. */ 279 u32 version; 280 281 /* Function IDs used by host if version is v0.1. */ 282 struct psci_0_1_function_ids function_ids_0_1; 283 284 bool psci_0_1_cpu_suspend_implemented; 285 bool psci_0_1_cpu_on_implemented; 286 bool psci_0_1_cpu_off_implemented; 287 bool psci_0_1_migrate_implemented; 288 }; 289 290 extern struct kvm_host_psci_config kvm_nvhe_sym(kvm_host_psci_config); 291 #define kvm_host_psci_config CHOOSE_NVHE_SYM(kvm_host_psci_config) 292 293 extern s64 kvm_nvhe_sym(hyp_physvirt_offset); 294 #define hyp_physvirt_offset CHOOSE_NVHE_SYM(hyp_physvirt_offset) 295 296 extern u64 kvm_nvhe_sym(hyp_cpu_logical_map)[NR_CPUS]; 297 #define hyp_cpu_logical_map CHOOSE_NVHE_SYM(hyp_cpu_logical_map) 298 299 struct vcpu_reset_state { 300 unsigned long pc; 301 unsigned long r0; 302 bool be; 303 bool reset; 304 }; 305 306 struct kvm_vcpu_arch { 307 struct kvm_cpu_context ctxt; 308 309 /* Guest floating point state */ 310 void *sve_state; 311 unsigned int sve_max_vl; 312 u64 svcr; 313 314 /* Stage 2 paging state used by the hardware on next switch */ 315 struct kvm_s2_mmu *hw_mmu; 316 317 /* Values of trap registers for the guest. */ 318 u64 hcr_el2; 319 u64 mdcr_el2; 320 u64 cptr_el2; 321 322 /* Values of trap registers for the host before guest entry. */ 323 u64 mdcr_el2_host; 324 325 /* Exception Information */ 326 struct kvm_vcpu_fault_info fault; 327 328 /* Miscellaneous vcpu state flags */ 329 u64 flags; 330 331 /* 332 * We maintain more than a single set of debug registers to support 333 * debugging the guest from the host and to maintain separate host and 334 * guest state during world switches. vcpu_debug_state are the debug 335 * registers of the vcpu as the guest sees them. host_debug_state are 336 * the host registers which are saved and restored during 337 * world switches. external_debug_state contains the debug 338 * values we want to debug the guest. This is set via the 339 * KVM_SET_GUEST_DEBUG ioctl. 340 * 341 * debug_ptr points to the set of debug registers that should be loaded 342 * onto the hardware when running the guest. 343 */ 344 struct kvm_guest_debug_arch *debug_ptr; 345 struct kvm_guest_debug_arch vcpu_debug_state; 346 struct kvm_guest_debug_arch external_debug_state; 347 348 struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */ 349 struct task_struct *parent_task; 350 351 struct { 352 /* {Break,watch}point registers */ 353 struct kvm_guest_debug_arch regs; 354 /* Statistical profiling extension */ 355 u64 pmscr_el1; 356 /* Self-hosted trace */ 357 u64 trfcr_el1; 358 } host_debug_state; 359 360 /* VGIC state */ 361 struct vgic_cpu vgic_cpu; 362 struct arch_timer_cpu timer_cpu; 363 struct kvm_pmu pmu; 364 365 /* 366 * Guest registers we preserve during guest debugging. 367 * 368 * These shadow registers are updated by the kvm_handle_sys_reg 369 * trap handler if the guest accesses or updates them while we 370 * are using guest debug. 371 */ 372 struct { 373 u32 mdscr_el1; 374 } guest_debug_preserved; 375 376 /* vcpu power state */ 377 struct kvm_mp_state mp_state; 378 379 /* Don't run the guest (internal implementation need) */ 380 bool pause; 381 382 /* Cache some mmu pages needed inside spinlock regions */ 383 struct kvm_mmu_memory_cache mmu_page_cache; 384 385 /* Target CPU and feature flags */ 386 int target; 387 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 388 389 /* Virtual SError ESR to restore when HCR_EL2.VSE is set */ 390 u64 vsesr_el2; 391 392 /* Additional reset state */ 393 struct vcpu_reset_state reset_state; 394 395 /* True when deferrable sysregs are loaded on the physical CPU, 396 * see kvm_vcpu_load_sysregs_vhe and kvm_vcpu_put_sysregs_vhe. */ 397 bool sysregs_loaded_on_cpu; 398 399 /* Guest PV state */ 400 struct { 401 u64 last_steal; 402 gpa_t base; 403 } steal; 404 }; 405 406 /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */ 407 #define vcpu_sve_pffr(vcpu) (kern_hyp_va((vcpu)->arch.sve_state) + \ 408 sve_ffr_offset((vcpu)->arch.sve_max_vl)) 409 410 #define vcpu_sve_max_vq(vcpu) sve_vq_from_vl((vcpu)->arch.sve_max_vl) 411 412 #define vcpu_sve_state_size(vcpu) ({ \ 413 size_t __size_ret; \ 414 unsigned int __vcpu_vq; \ 415 \ 416 if (WARN_ON(!sve_vl_valid((vcpu)->arch.sve_max_vl))) { \ 417 __size_ret = 0; \ 418 } else { \ 419 __vcpu_vq = vcpu_sve_max_vq(vcpu); \ 420 __size_ret = SVE_SIG_REGS_SIZE(__vcpu_vq); \ 421 } \ 422 \ 423 __size_ret; \ 424 }) 425 426 /* vcpu_arch flags field values: */ 427 #define KVM_ARM64_DEBUG_DIRTY (1 << 0) 428 #define KVM_ARM64_FP_ENABLED (1 << 1) /* guest FP regs loaded */ 429 #define KVM_ARM64_FP_HOST (1 << 2) /* host FP regs loaded */ 430 #define KVM_ARM64_HOST_SVE_ENABLED (1 << 4) /* SVE enabled for EL0 */ 431 #define KVM_ARM64_GUEST_HAS_SVE (1 << 5) /* SVE exposed to guest */ 432 #define KVM_ARM64_VCPU_SVE_FINALIZED (1 << 6) /* SVE config completed */ 433 #define KVM_ARM64_GUEST_HAS_PTRAUTH (1 << 7) /* PTRAUTH exposed to guest */ 434 #define KVM_ARM64_PENDING_EXCEPTION (1 << 8) /* Exception pending */ 435 /* 436 * Overlaps with KVM_ARM64_EXCEPT_MASK on purpose so that it can't be 437 * set together with an exception... 438 */ 439 #define KVM_ARM64_INCREMENT_PC (1 << 9) /* Increment PC */ 440 #define KVM_ARM64_EXCEPT_MASK (7 << 9) /* Target EL/MODE */ 441 /* 442 * When KVM_ARM64_PENDING_EXCEPTION is set, KVM_ARM64_EXCEPT_MASK can 443 * take the following values: 444 * 445 * For AArch32 EL1: 446 */ 447 #define KVM_ARM64_EXCEPT_AA32_UND (0 << 9) 448 #define KVM_ARM64_EXCEPT_AA32_IABT (1 << 9) 449 #define KVM_ARM64_EXCEPT_AA32_DABT (2 << 9) 450 /* For AArch64: */ 451 #define KVM_ARM64_EXCEPT_AA64_ELx_SYNC (0 << 9) 452 #define KVM_ARM64_EXCEPT_AA64_ELx_IRQ (1 << 9) 453 #define KVM_ARM64_EXCEPT_AA64_ELx_FIQ (2 << 9) 454 #define KVM_ARM64_EXCEPT_AA64_ELx_SERR (3 << 9) 455 #define KVM_ARM64_EXCEPT_AA64_EL1 (0 << 11) 456 #define KVM_ARM64_EXCEPT_AA64_EL2 (1 << 11) 457 458 #define KVM_ARM64_DEBUG_STATE_SAVE_SPE (1 << 12) /* Save SPE context if active */ 459 #define KVM_ARM64_DEBUG_STATE_SAVE_TRBE (1 << 13) /* Save TRBE context if active */ 460 #define KVM_ARM64_FP_FOREIGN_FPSTATE (1 << 14) 461 #define KVM_ARM64_ON_UNSUPPORTED_CPU (1 << 15) /* Physical CPU not in supported_cpus */ 462 #define KVM_ARM64_HOST_SME_ENABLED (1 << 16) /* SME enabled for EL0 */ 463 #define KVM_ARM64_WFIT (1 << 17) /* WFIT instruction trapped */ 464 465 #define KVM_GUESTDBG_VALID_MASK (KVM_GUESTDBG_ENABLE | \ 466 KVM_GUESTDBG_USE_SW_BP | \ 467 KVM_GUESTDBG_USE_HW | \ 468 KVM_GUESTDBG_SINGLESTEP) 469 470 #define vcpu_has_sve(vcpu) (system_supports_sve() && \ 471 ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE)) 472 473 #ifdef CONFIG_ARM64_PTR_AUTH 474 #define vcpu_has_ptrauth(vcpu) \ 475 ((cpus_have_final_cap(ARM64_HAS_ADDRESS_AUTH) || \ 476 cpus_have_final_cap(ARM64_HAS_GENERIC_AUTH)) && \ 477 (vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_PTRAUTH) 478 #else 479 #define vcpu_has_ptrauth(vcpu) false 480 #endif 481 482 #define vcpu_on_unsupported_cpu(vcpu) \ 483 ((vcpu)->arch.flags & KVM_ARM64_ON_UNSUPPORTED_CPU) 484 485 #define vcpu_set_on_unsupported_cpu(vcpu) \ 486 ((vcpu)->arch.flags |= KVM_ARM64_ON_UNSUPPORTED_CPU) 487 488 #define vcpu_clear_on_unsupported_cpu(vcpu) \ 489 ((vcpu)->arch.flags &= ~KVM_ARM64_ON_UNSUPPORTED_CPU) 490 491 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.regs) 492 493 /* 494 * Only use __vcpu_sys_reg/ctxt_sys_reg if you know you want the 495 * memory backed version of a register, and not the one most recently 496 * accessed by a running VCPU. For example, for userspace access or 497 * for system registers that are never context switched, but only 498 * emulated. 499 */ 500 #define __ctxt_sys_reg(c,r) (&(c)->sys_regs[(r)]) 501 502 #define ctxt_sys_reg(c,r) (*__ctxt_sys_reg(c,r)) 503 504 #define __vcpu_sys_reg(v,r) (ctxt_sys_reg(&(v)->arch.ctxt, (r))) 505 506 u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg); 507 void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg); 508 509 static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val) 510 { 511 /* 512 * *** VHE ONLY *** 513 * 514 * System registers listed in the switch are not saved on every 515 * exit from the guest but are only saved on vcpu_put. 516 * 517 * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but 518 * should never be listed below, because the guest cannot modify its 519 * own MPIDR_EL1 and MPIDR_EL1 is accessed for VCPU A from VCPU B's 520 * thread when emulating cross-VCPU communication. 521 */ 522 if (!has_vhe()) 523 return false; 524 525 switch (reg) { 526 case CSSELR_EL1: *val = read_sysreg_s(SYS_CSSELR_EL1); break; 527 case SCTLR_EL1: *val = read_sysreg_s(SYS_SCTLR_EL12); break; 528 case CPACR_EL1: *val = read_sysreg_s(SYS_CPACR_EL12); break; 529 case TTBR0_EL1: *val = read_sysreg_s(SYS_TTBR0_EL12); break; 530 case TTBR1_EL1: *val = read_sysreg_s(SYS_TTBR1_EL12); break; 531 case TCR_EL1: *val = read_sysreg_s(SYS_TCR_EL12); break; 532 case ESR_EL1: *val = read_sysreg_s(SYS_ESR_EL12); break; 533 case AFSR0_EL1: *val = read_sysreg_s(SYS_AFSR0_EL12); break; 534 case AFSR1_EL1: *val = read_sysreg_s(SYS_AFSR1_EL12); break; 535 case FAR_EL1: *val = read_sysreg_s(SYS_FAR_EL12); break; 536 case MAIR_EL1: *val = read_sysreg_s(SYS_MAIR_EL12); break; 537 case VBAR_EL1: *val = read_sysreg_s(SYS_VBAR_EL12); break; 538 case CONTEXTIDR_EL1: *val = read_sysreg_s(SYS_CONTEXTIDR_EL12);break; 539 case TPIDR_EL0: *val = read_sysreg_s(SYS_TPIDR_EL0); break; 540 case TPIDRRO_EL0: *val = read_sysreg_s(SYS_TPIDRRO_EL0); break; 541 case TPIDR_EL1: *val = read_sysreg_s(SYS_TPIDR_EL1); break; 542 case AMAIR_EL1: *val = read_sysreg_s(SYS_AMAIR_EL12); break; 543 case CNTKCTL_EL1: *val = read_sysreg_s(SYS_CNTKCTL_EL12); break; 544 case ELR_EL1: *val = read_sysreg_s(SYS_ELR_EL12); break; 545 case PAR_EL1: *val = read_sysreg_par(); break; 546 case DACR32_EL2: *val = read_sysreg_s(SYS_DACR32_EL2); break; 547 case IFSR32_EL2: *val = read_sysreg_s(SYS_IFSR32_EL2); break; 548 case DBGVCR32_EL2: *val = read_sysreg_s(SYS_DBGVCR32_EL2); break; 549 default: return false; 550 } 551 552 return true; 553 } 554 555 static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg) 556 { 557 /* 558 * *** VHE ONLY *** 559 * 560 * System registers listed in the switch are not restored on every 561 * entry to the guest but are only restored on vcpu_load. 562 * 563 * Note that MPIDR_EL1 for the guest is set by KVM via VMPIDR_EL2 but 564 * should never be listed below, because the MPIDR should only be set 565 * once, before running the VCPU, and never changed later. 566 */ 567 if (!has_vhe()) 568 return false; 569 570 switch (reg) { 571 case CSSELR_EL1: write_sysreg_s(val, SYS_CSSELR_EL1); break; 572 case SCTLR_EL1: write_sysreg_s(val, SYS_SCTLR_EL12); break; 573 case CPACR_EL1: write_sysreg_s(val, SYS_CPACR_EL12); break; 574 case TTBR0_EL1: write_sysreg_s(val, SYS_TTBR0_EL12); break; 575 case TTBR1_EL1: write_sysreg_s(val, SYS_TTBR1_EL12); break; 576 case TCR_EL1: write_sysreg_s(val, SYS_TCR_EL12); break; 577 case ESR_EL1: write_sysreg_s(val, SYS_ESR_EL12); break; 578 case AFSR0_EL1: write_sysreg_s(val, SYS_AFSR0_EL12); break; 579 case AFSR1_EL1: write_sysreg_s(val, SYS_AFSR1_EL12); break; 580 case FAR_EL1: write_sysreg_s(val, SYS_FAR_EL12); break; 581 case MAIR_EL1: write_sysreg_s(val, SYS_MAIR_EL12); break; 582 case VBAR_EL1: write_sysreg_s(val, SYS_VBAR_EL12); break; 583 case CONTEXTIDR_EL1: write_sysreg_s(val, SYS_CONTEXTIDR_EL12);break; 584 case TPIDR_EL0: write_sysreg_s(val, SYS_TPIDR_EL0); break; 585 case TPIDRRO_EL0: write_sysreg_s(val, SYS_TPIDRRO_EL0); break; 586 case TPIDR_EL1: write_sysreg_s(val, SYS_TPIDR_EL1); break; 587 case AMAIR_EL1: write_sysreg_s(val, SYS_AMAIR_EL12); break; 588 case CNTKCTL_EL1: write_sysreg_s(val, SYS_CNTKCTL_EL12); break; 589 case ELR_EL1: write_sysreg_s(val, SYS_ELR_EL12); break; 590 case PAR_EL1: write_sysreg_s(val, SYS_PAR_EL1); break; 591 case DACR32_EL2: write_sysreg_s(val, SYS_DACR32_EL2); break; 592 case IFSR32_EL2: write_sysreg_s(val, SYS_IFSR32_EL2); break; 593 case DBGVCR32_EL2: write_sysreg_s(val, SYS_DBGVCR32_EL2); break; 594 default: return false; 595 } 596 597 return true; 598 } 599 600 struct kvm_vm_stat { 601 struct kvm_vm_stat_generic generic; 602 }; 603 604 struct kvm_vcpu_stat { 605 struct kvm_vcpu_stat_generic generic; 606 u64 hvc_exit_stat; 607 u64 wfe_exit_stat; 608 u64 wfi_exit_stat; 609 u64 mmio_exit_user; 610 u64 mmio_exit_kernel; 611 u64 signal_exits; 612 u64 exits; 613 }; 614 615 void kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 616 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 617 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 618 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 619 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 620 621 unsigned long kvm_arm_num_sys_reg_descs(struct kvm_vcpu *vcpu); 622 int kvm_arm_copy_sys_reg_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); 623 int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); 624 int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); 625 626 int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, 627 struct kvm_vcpu_events *events); 628 629 int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, 630 struct kvm_vcpu_events *events); 631 632 #define KVM_ARCH_WANT_MMU_NOTIFIER 633 634 void kvm_arm_halt_guest(struct kvm *kvm); 635 void kvm_arm_resume_guest(struct kvm *kvm); 636 637 #define vcpu_has_run_once(vcpu) !!rcu_access_pointer((vcpu)->pid) 638 639 #ifndef __KVM_NVHE_HYPERVISOR__ 640 #define kvm_call_hyp_nvhe(f, ...) \ 641 ({ \ 642 struct arm_smccc_res res; \ 643 \ 644 arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(f), \ 645 ##__VA_ARGS__, &res); \ 646 WARN_ON(res.a0 != SMCCC_RET_SUCCESS); \ 647 \ 648 res.a1; \ 649 }) 650 651 /* 652 * The couple of isb() below are there to guarantee the same behaviour 653 * on VHE as on !VHE, where the eret to EL1 acts as a context 654 * synchronization event. 655 */ 656 #define kvm_call_hyp(f, ...) \ 657 do { \ 658 if (has_vhe()) { \ 659 f(__VA_ARGS__); \ 660 isb(); \ 661 } else { \ 662 kvm_call_hyp_nvhe(f, ##__VA_ARGS__); \ 663 } \ 664 } while(0) 665 666 #define kvm_call_hyp_ret(f, ...) \ 667 ({ \ 668 typeof(f(__VA_ARGS__)) ret; \ 669 \ 670 if (has_vhe()) { \ 671 ret = f(__VA_ARGS__); \ 672 isb(); \ 673 } else { \ 674 ret = kvm_call_hyp_nvhe(f, ##__VA_ARGS__); \ 675 } \ 676 \ 677 ret; \ 678 }) 679 #else /* __KVM_NVHE_HYPERVISOR__ */ 680 #define kvm_call_hyp(f, ...) f(__VA_ARGS__) 681 #define kvm_call_hyp_ret(f, ...) f(__VA_ARGS__) 682 #define kvm_call_hyp_nvhe(f, ...) f(__VA_ARGS__) 683 #endif /* __KVM_NVHE_HYPERVISOR__ */ 684 685 void force_vm_exit(const cpumask_t *mask); 686 687 int handle_exit(struct kvm_vcpu *vcpu, int exception_index); 688 void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index); 689 690 int kvm_handle_cp14_load_store(struct kvm_vcpu *vcpu); 691 int kvm_handle_cp14_32(struct kvm_vcpu *vcpu); 692 int kvm_handle_cp14_64(struct kvm_vcpu *vcpu); 693 int kvm_handle_cp15_32(struct kvm_vcpu *vcpu); 694 int kvm_handle_cp15_64(struct kvm_vcpu *vcpu); 695 int kvm_handle_sys_reg(struct kvm_vcpu *vcpu); 696 int kvm_handle_cp10_id(struct kvm_vcpu *vcpu); 697 698 void kvm_reset_sys_regs(struct kvm_vcpu *vcpu); 699 700 int kvm_sys_reg_table_init(void); 701 702 /* MMIO helpers */ 703 void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data); 704 unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len); 705 706 int kvm_handle_mmio_return(struct kvm_vcpu *vcpu); 707 int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa); 708 709 /* 710 * Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event, 711 * arrived in guest context. For arm64, any event that arrives while a vCPU is 712 * loaded is considered to be "in guest". 713 */ 714 static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) 715 { 716 return IS_ENABLED(CONFIG_GUEST_PERF_EVENTS) && !!vcpu; 717 } 718 719 long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu); 720 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu); 721 void kvm_update_stolen_time(struct kvm_vcpu *vcpu); 722 723 bool kvm_arm_pvtime_supported(void); 724 int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu, 725 struct kvm_device_attr *attr); 726 int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu, 727 struct kvm_device_attr *attr); 728 int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu, 729 struct kvm_device_attr *attr); 730 731 extern unsigned int kvm_arm_vmid_bits; 732 int kvm_arm_vmid_alloc_init(void); 733 void kvm_arm_vmid_alloc_free(void); 734 void kvm_arm_vmid_update(struct kvm_vmid *kvm_vmid); 735 void kvm_arm_vmid_clear_active(void); 736 737 static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch) 738 { 739 vcpu_arch->steal.base = GPA_INVALID; 740 } 741 742 static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch) 743 { 744 return (vcpu_arch->steal.base != GPA_INVALID); 745 } 746 747 void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome); 748 749 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 750 751 DECLARE_KVM_HYP_PER_CPU(struct kvm_host_data, kvm_host_data); 752 753 static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt) 754 { 755 /* The host's MPIDR is immutable, so let's set it up at boot time */ 756 ctxt_sys_reg(cpu_ctxt, MPIDR_EL1) = read_cpuid_mpidr(); 757 } 758 759 static inline bool kvm_system_needs_idmapped_vectors(void) 760 { 761 return cpus_have_const_cap(ARM64_SPECTRE_V3A); 762 } 763 764 void kvm_arm_vcpu_ptrauth_trap(struct kvm_vcpu *vcpu); 765 766 static inline void kvm_arch_hardware_unsetup(void) {} 767 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 768 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 769 770 void kvm_arm_init_debug(void); 771 void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu); 772 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); 773 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); 774 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); 775 776 #define kvm_vcpu_os_lock_enabled(vcpu) \ 777 (!!(__vcpu_sys_reg(vcpu, OSLSR_EL1) & SYS_OSLSR_OSLK)) 778 779 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu, 780 struct kvm_device_attr *attr); 781 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu, 782 struct kvm_device_attr *attr); 783 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu, 784 struct kvm_device_attr *attr); 785 786 long kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, 787 struct kvm_arm_copy_mte_tags *copy_tags); 788 789 /* Guest/host FPSIMD coordination helpers */ 790 int kvm_arch_vcpu_run_map_fp(struct kvm_vcpu *vcpu); 791 void kvm_arch_vcpu_load_fp(struct kvm_vcpu *vcpu); 792 void kvm_arch_vcpu_ctxflush_fp(struct kvm_vcpu *vcpu); 793 void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu); 794 void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu); 795 void kvm_vcpu_unshare_task_fp(struct kvm_vcpu *vcpu); 796 797 static inline bool kvm_pmu_counter_deferred(struct perf_event_attr *attr) 798 { 799 return (!has_vhe() && attr->exclude_host); 800 } 801 802 /* Flags for host debug state */ 803 void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu); 804 void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu); 805 806 #ifdef CONFIG_KVM 807 void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr); 808 void kvm_clr_pmu_events(u32 clr); 809 #else 810 static inline void kvm_set_pmu_events(u32 set, struct perf_event_attr *attr) {} 811 static inline void kvm_clr_pmu_events(u32 clr) {} 812 #endif 813 814 void kvm_vcpu_load_sysregs_vhe(struct kvm_vcpu *vcpu); 815 void kvm_vcpu_put_sysregs_vhe(struct kvm_vcpu *vcpu); 816 817 int kvm_set_ipa_limit(void); 818 819 #define __KVM_HAVE_ARCH_VM_ALLOC 820 struct kvm *kvm_arch_alloc_vm(void); 821 822 int kvm_arm_setup_stage2(struct kvm *kvm, unsigned long type); 823 824 static inline bool kvm_vm_is_protected(struct kvm *kvm) 825 { 826 return false; 827 } 828 829 void kvm_init_protected_traps(struct kvm_vcpu *vcpu); 830 831 int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature); 832 bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu); 833 834 #define kvm_arm_vcpu_sve_finalized(vcpu) \ 835 ((vcpu)->arch.flags & KVM_ARM64_VCPU_SVE_FINALIZED) 836 837 #define kvm_has_mte(kvm) \ 838 (system_supports_mte() && \ 839 test_bit(KVM_ARCH_FLAG_MTE_ENABLED, &(kvm)->arch.flags)) 840 841 int kvm_trng_call(struct kvm_vcpu *vcpu); 842 #ifdef CONFIG_KVM 843 extern phys_addr_t hyp_mem_base; 844 extern phys_addr_t hyp_mem_size; 845 void __init kvm_hyp_reserve(void); 846 #else 847 static inline void kvm_hyp_reserve(void) { } 848 #endif 849 850 void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu); 851 bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu); 852 853 #endif /* __ARM64_KVM_HOST_H__ */ 854