1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * tools/testing/selftests/kvm/include/x86_64/processor.h 4 * 5 * Copyright (C) 2018, Google LLC. 6 */ 7 8 #ifndef SELFTEST_KVM_PROCESSOR_H 9 #define SELFTEST_KVM_PROCESSOR_H 10 11 #include <assert.h> 12 #include <stdint.h> 13 #include <syscall.h> 14 15 #include <asm/msr-index.h> 16 #include <asm/prctl.h> 17 18 #include <linux/kvm_para.h> 19 #include <linux/stringify.h> 20 21 #include "../kvm_util.h" 22 23 extern bool host_cpu_is_intel; 24 extern bool host_cpu_is_amd; 25 26 #define NMI_VECTOR 0x02 27 28 #define X86_EFLAGS_FIXED (1u << 1) 29 30 #define X86_CR4_VME (1ul << 0) 31 #define X86_CR4_PVI (1ul << 1) 32 #define X86_CR4_TSD (1ul << 2) 33 #define X86_CR4_DE (1ul << 3) 34 #define X86_CR4_PSE (1ul << 4) 35 #define X86_CR4_PAE (1ul << 5) 36 #define X86_CR4_MCE (1ul << 6) 37 #define X86_CR4_PGE (1ul << 7) 38 #define X86_CR4_PCE (1ul << 8) 39 #define X86_CR4_OSFXSR (1ul << 9) 40 #define X86_CR4_OSXMMEXCPT (1ul << 10) 41 #define X86_CR4_UMIP (1ul << 11) 42 #define X86_CR4_LA57 (1ul << 12) 43 #define X86_CR4_VMXE (1ul << 13) 44 #define X86_CR4_SMXE (1ul << 14) 45 #define X86_CR4_FSGSBASE (1ul << 16) 46 #define X86_CR4_PCIDE (1ul << 17) 47 #define X86_CR4_OSXSAVE (1ul << 18) 48 #define X86_CR4_SMEP (1ul << 20) 49 #define X86_CR4_SMAP (1ul << 21) 50 #define X86_CR4_PKE (1ul << 22) 51 52 struct xstate_header { 53 u64 xstate_bv; 54 u64 xcomp_bv; 55 u64 reserved[6]; 56 } __attribute__((packed)); 57 58 struct xstate { 59 u8 i387[512]; 60 struct xstate_header header; 61 u8 extended_state_area[0]; 62 } __attribute__ ((packed, aligned (64))); 63 64 #define XFEATURE_MASK_FP BIT_ULL(0) 65 #define XFEATURE_MASK_SSE BIT_ULL(1) 66 #define XFEATURE_MASK_YMM BIT_ULL(2) 67 #define XFEATURE_MASK_BNDREGS BIT_ULL(3) 68 #define XFEATURE_MASK_BNDCSR BIT_ULL(4) 69 #define XFEATURE_MASK_OPMASK BIT_ULL(5) 70 #define XFEATURE_MASK_ZMM_Hi256 BIT_ULL(6) 71 #define XFEATURE_MASK_Hi16_ZMM BIT_ULL(7) 72 #define XFEATURE_MASK_PT BIT_ULL(8) 73 #define XFEATURE_MASK_PKRU BIT_ULL(9) 74 #define XFEATURE_MASK_PASID BIT_ULL(10) 75 #define XFEATURE_MASK_CET_USER BIT_ULL(11) 76 #define XFEATURE_MASK_CET_KERNEL BIT_ULL(12) 77 #define XFEATURE_MASK_LBR BIT_ULL(15) 78 #define XFEATURE_MASK_XTILE_CFG BIT_ULL(17) 79 #define XFEATURE_MASK_XTILE_DATA BIT_ULL(18) 80 81 #define XFEATURE_MASK_AVX512 (XFEATURE_MASK_OPMASK | \ 82 XFEATURE_MASK_ZMM_Hi256 | \ 83 XFEATURE_MASK_Hi16_ZMM) 84 #define XFEATURE_MASK_XTILE (XFEATURE_MASK_XTILE_DATA | \ 85 XFEATURE_MASK_XTILE_CFG) 86 87 /* Note, these are ordered alphabetically to match kvm_cpuid_entry2. Eww. */ 88 enum cpuid_output_regs { 89 KVM_CPUID_EAX, 90 KVM_CPUID_EBX, 91 KVM_CPUID_ECX, 92 KVM_CPUID_EDX 93 }; 94 95 /* 96 * Pack the information into a 64-bit value so that each X86_FEATURE_XXX can be 97 * passed by value with no overhead. 98 */ 99 struct kvm_x86_cpu_feature { 100 u32 function; 101 u16 index; 102 u8 reg; 103 u8 bit; 104 }; 105 #define KVM_X86_CPU_FEATURE(fn, idx, gpr, __bit) \ 106 ({ \ 107 struct kvm_x86_cpu_feature feature = { \ 108 .function = fn, \ 109 .index = idx, \ 110 .reg = KVM_CPUID_##gpr, \ 111 .bit = __bit, \ 112 }; \ 113 \ 114 kvm_static_assert((fn & 0xc0000000) == 0 || \ 115 (fn & 0xc0000000) == 0x40000000 || \ 116 (fn & 0xc0000000) == 0x80000000 || \ 117 (fn & 0xc0000000) == 0xc0000000); \ 118 kvm_static_assert(idx < BIT(sizeof(feature.index) * BITS_PER_BYTE)); \ 119 feature; \ 120 }) 121 122 /* 123 * Basic Leafs, a.k.a. Intel defined 124 */ 125 #define X86_FEATURE_MWAIT KVM_X86_CPU_FEATURE(0x1, 0, ECX, 3) 126 #define X86_FEATURE_VMX KVM_X86_CPU_FEATURE(0x1, 0, ECX, 5) 127 #define X86_FEATURE_SMX KVM_X86_CPU_FEATURE(0x1, 0, ECX, 6) 128 #define X86_FEATURE_PDCM KVM_X86_CPU_FEATURE(0x1, 0, ECX, 15) 129 #define X86_FEATURE_PCID KVM_X86_CPU_FEATURE(0x1, 0, ECX, 17) 130 #define X86_FEATURE_X2APIC KVM_X86_CPU_FEATURE(0x1, 0, ECX, 21) 131 #define X86_FEATURE_MOVBE KVM_X86_CPU_FEATURE(0x1, 0, ECX, 22) 132 #define X86_FEATURE_TSC_DEADLINE_TIMER KVM_X86_CPU_FEATURE(0x1, 0, ECX, 24) 133 #define X86_FEATURE_XSAVE KVM_X86_CPU_FEATURE(0x1, 0, ECX, 26) 134 #define X86_FEATURE_OSXSAVE KVM_X86_CPU_FEATURE(0x1, 0, ECX, 27) 135 #define X86_FEATURE_RDRAND KVM_X86_CPU_FEATURE(0x1, 0, ECX, 30) 136 #define X86_FEATURE_HYPERVISOR KVM_X86_CPU_FEATURE(0x1, 0, ECX, 31) 137 #define X86_FEATURE_PAE KVM_X86_CPU_FEATURE(0x1, 0, EDX, 6) 138 #define X86_FEATURE_MCE KVM_X86_CPU_FEATURE(0x1, 0, EDX, 7) 139 #define X86_FEATURE_APIC KVM_X86_CPU_FEATURE(0x1, 0, EDX, 9) 140 #define X86_FEATURE_CLFLUSH KVM_X86_CPU_FEATURE(0x1, 0, EDX, 19) 141 #define X86_FEATURE_XMM KVM_X86_CPU_FEATURE(0x1, 0, EDX, 25) 142 #define X86_FEATURE_XMM2 KVM_X86_CPU_FEATURE(0x1, 0, EDX, 26) 143 #define X86_FEATURE_FSGSBASE KVM_X86_CPU_FEATURE(0x7, 0, EBX, 0) 144 #define X86_FEATURE_TSC_ADJUST KVM_X86_CPU_FEATURE(0x7, 0, EBX, 1) 145 #define X86_FEATURE_SGX KVM_X86_CPU_FEATURE(0x7, 0, EBX, 2) 146 #define X86_FEATURE_HLE KVM_X86_CPU_FEATURE(0x7, 0, EBX, 4) 147 #define X86_FEATURE_SMEP KVM_X86_CPU_FEATURE(0x7, 0, EBX, 7) 148 #define X86_FEATURE_INVPCID KVM_X86_CPU_FEATURE(0x7, 0, EBX, 10) 149 #define X86_FEATURE_RTM KVM_X86_CPU_FEATURE(0x7, 0, EBX, 11) 150 #define X86_FEATURE_MPX KVM_X86_CPU_FEATURE(0x7, 0, EBX, 14) 151 #define X86_FEATURE_SMAP KVM_X86_CPU_FEATURE(0x7, 0, EBX, 20) 152 #define X86_FEATURE_PCOMMIT KVM_X86_CPU_FEATURE(0x7, 0, EBX, 22) 153 #define X86_FEATURE_CLFLUSHOPT KVM_X86_CPU_FEATURE(0x7, 0, EBX, 23) 154 #define X86_FEATURE_CLWB KVM_X86_CPU_FEATURE(0x7, 0, EBX, 24) 155 #define X86_FEATURE_UMIP KVM_X86_CPU_FEATURE(0x7, 0, ECX, 2) 156 #define X86_FEATURE_PKU KVM_X86_CPU_FEATURE(0x7, 0, ECX, 3) 157 #define X86_FEATURE_OSPKE KVM_X86_CPU_FEATURE(0x7, 0, ECX, 4) 158 #define X86_FEATURE_LA57 KVM_X86_CPU_FEATURE(0x7, 0, ECX, 16) 159 #define X86_FEATURE_RDPID KVM_X86_CPU_FEATURE(0x7, 0, ECX, 22) 160 #define X86_FEATURE_SGX_LC KVM_X86_CPU_FEATURE(0x7, 0, ECX, 30) 161 #define X86_FEATURE_SHSTK KVM_X86_CPU_FEATURE(0x7, 0, ECX, 7) 162 #define X86_FEATURE_IBT KVM_X86_CPU_FEATURE(0x7, 0, EDX, 20) 163 #define X86_FEATURE_AMX_TILE KVM_X86_CPU_FEATURE(0x7, 0, EDX, 24) 164 #define X86_FEATURE_SPEC_CTRL KVM_X86_CPU_FEATURE(0x7, 0, EDX, 26) 165 #define X86_FEATURE_ARCH_CAPABILITIES KVM_X86_CPU_FEATURE(0x7, 0, EDX, 29) 166 #define X86_FEATURE_PKS KVM_X86_CPU_FEATURE(0x7, 0, ECX, 31) 167 #define X86_FEATURE_XTILECFG KVM_X86_CPU_FEATURE(0xD, 0, EAX, 17) 168 #define X86_FEATURE_XTILEDATA KVM_X86_CPU_FEATURE(0xD, 0, EAX, 18) 169 #define X86_FEATURE_XSAVES KVM_X86_CPU_FEATURE(0xD, 1, EAX, 3) 170 #define X86_FEATURE_XFD KVM_X86_CPU_FEATURE(0xD, 1, EAX, 4) 171 #define X86_FEATURE_XTILEDATA_XFD KVM_X86_CPU_FEATURE(0xD, 18, ECX, 2) 172 173 /* 174 * Extended Leafs, a.k.a. AMD defined 175 */ 176 #define X86_FEATURE_SVM KVM_X86_CPU_FEATURE(0x80000001, 0, ECX, 2) 177 #define X86_FEATURE_NX KVM_X86_CPU_FEATURE(0x80000001, 0, EDX, 20) 178 #define X86_FEATURE_GBPAGES KVM_X86_CPU_FEATURE(0x80000001, 0, EDX, 26) 179 #define X86_FEATURE_RDTSCP KVM_X86_CPU_FEATURE(0x80000001, 0, EDX, 27) 180 #define X86_FEATURE_LM KVM_X86_CPU_FEATURE(0x80000001, 0, EDX, 29) 181 #define X86_FEATURE_INVTSC KVM_X86_CPU_FEATURE(0x80000007, 0, EDX, 8) 182 #define X86_FEATURE_RDPRU KVM_X86_CPU_FEATURE(0x80000008, 0, EBX, 4) 183 #define X86_FEATURE_AMD_IBPB KVM_X86_CPU_FEATURE(0x80000008, 0, EBX, 12) 184 #define X86_FEATURE_NPT KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 0) 185 #define X86_FEATURE_LBRV KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 1) 186 #define X86_FEATURE_NRIPS KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 3) 187 #define X86_FEATURE_TSCRATEMSR KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 4) 188 #define X86_FEATURE_PAUSEFILTER KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 10) 189 #define X86_FEATURE_PFTHRESHOLD KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 12) 190 #define X86_FEATURE_VGIF KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 16) 191 #define X86_FEATURE_SEV KVM_X86_CPU_FEATURE(0x8000001F, 0, EAX, 1) 192 #define X86_FEATURE_SEV_ES KVM_X86_CPU_FEATURE(0x8000001F, 0, EAX, 3) 193 194 /* 195 * KVM defined paravirt features. 196 */ 197 #define X86_FEATURE_KVM_CLOCKSOURCE KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 0) 198 #define X86_FEATURE_KVM_NOP_IO_DELAY KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 1) 199 #define X86_FEATURE_KVM_MMU_OP KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 2) 200 #define X86_FEATURE_KVM_CLOCKSOURCE2 KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 3) 201 #define X86_FEATURE_KVM_ASYNC_PF KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 4) 202 #define X86_FEATURE_KVM_STEAL_TIME KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 5) 203 #define X86_FEATURE_KVM_PV_EOI KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 6) 204 #define X86_FEATURE_KVM_PV_UNHALT KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 7) 205 /* Bit 8 apparently isn't used?!?! */ 206 #define X86_FEATURE_KVM_PV_TLB_FLUSH KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 9) 207 #define X86_FEATURE_KVM_ASYNC_PF_VMEXIT KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 10) 208 #define X86_FEATURE_KVM_PV_SEND_IPI KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 11) 209 #define X86_FEATURE_KVM_POLL_CONTROL KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 12) 210 #define X86_FEATURE_KVM_PV_SCHED_YIELD KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 13) 211 #define X86_FEATURE_KVM_ASYNC_PF_INT KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 14) 212 #define X86_FEATURE_KVM_MSI_EXT_DEST_ID KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 15) 213 #define X86_FEATURE_KVM_HC_MAP_GPA_RANGE KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 16) 214 #define X86_FEATURE_KVM_MIGRATION_CONTROL KVM_X86_CPU_FEATURE(0x40000001, 0, EAX, 17) 215 216 /* 217 * Same idea as X86_FEATURE_XXX, but X86_PROPERTY_XXX retrieves a multi-bit 218 * value/property as opposed to a single-bit feature. Again, pack the info 219 * into a 64-bit value to pass by value with no overhead. 220 */ 221 struct kvm_x86_cpu_property { 222 u32 function; 223 u8 index; 224 u8 reg; 225 u8 lo_bit; 226 u8 hi_bit; 227 }; 228 #define KVM_X86_CPU_PROPERTY(fn, idx, gpr, low_bit, high_bit) \ 229 ({ \ 230 struct kvm_x86_cpu_property property = { \ 231 .function = fn, \ 232 .index = idx, \ 233 .reg = KVM_CPUID_##gpr, \ 234 .lo_bit = low_bit, \ 235 .hi_bit = high_bit, \ 236 }; \ 237 \ 238 kvm_static_assert(low_bit < high_bit); \ 239 kvm_static_assert((fn & 0xc0000000) == 0 || \ 240 (fn & 0xc0000000) == 0x40000000 || \ 241 (fn & 0xc0000000) == 0x80000000 || \ 242 (fn & 0xc0000000) == 0xc0000000); \ 243 kvm_static_assert(idx < BIT(sizeof(property.index) * BITS_PER_BYTE)); \ 244 property; \ 245 }) 246 247 #define X86_PROPERTY_MAX_BASIC_LEAF KVM_X86_CPU_PROPERTY(0, 0, EAX, 0, 31) 248 #define X86_PROPERTY_PMU_VERSION KVM_X86_CPU_PROPERTY(0xa, 0, EAX, 0, 7) 249 #define X86_PROPERTY_PMU_NR_GP_COUNTERS KVM_X86_CPU_PROPERTY(0xa, 0, EAX, 8, 15) 250 #define X86_PROPERTY_PMU_GP_COUNTERS_BIT_WIDTH KVM_X86_CPU_PROPERTY(0xa, 0, EAX, 16, 23) 251 #define X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH KVM_X86_CPU_PROPERTY(0xa, 0, EAX, 24, 31) 252 #define X86_PROPERTY_PMU_EVENTS_MASK KVM_X86_CPU_PROPERTY(0xa, 0, EBX, 0, 7) 253 #define X86_PROPERTY_PMU_FIXED_COUNTERS_BITMASK KVM_X86_CPU_PROPERTY(0xa, 0, ECX, 0, 31) 254 #define X86_PROPERTY_PMU_NR_FIXED_COUNTERS KVM_X86_CPU_PROPERTY(0xa, 0, EDX, 0, 4) 255 #define X86_PROPERTY_PMU_FIXED_COUNTERS_BIT_WIDTH KVM_X86_CPU_PROPERTY(0xa, 0, EDX, 5, 12) 256 257 #define X86_PROPERTY_SUPPORTED_XCR0_LO KVM_X86_CPU_PROPERTY(0xd, 0, EAX, 0, 31) 258 #define X86_PROPERTY_XSTATE_MAX_SIZE_XCR0 KVM_X86_CPU_PROPERTY(0xd, 0, EBX, 0, 31) 259 #define X86_PROPERTY_XSTATE_MAX_SIZE KVM_X86_CPU_PROPERTY(0xd, 0, ECX, 0, 31) 260 #define X86_PROPERTY_SUPPORTED_XCR0_HI KVM_X86_CPU_PROPERTY(0xd, 0, EDX, 0, 31) 261 262 #define X86_PROPERTY_XSTATE_TILE_SIZE KVM_X86_CPU_PROPERTY(0xd, 18, EAX, 0, 31) 263 #define X86_PROPERTY_XSTATE_TILE_OFFSET KVM_X86_CPU_PROPERTY(0xd, 18, EBX, 0, 31) 264 #define X86_PROPERTY_AMX_MAX_PALETTE_TABLES KVM_X86_CPU_PROPERTY(0x1d, 0, EAX, 0, 31) 265 #define X86_PROPERTY_AMX_TOTAL_TILE_BYTES KVM_X86_CPU_PROPERTY(0x1d, 1, EAX, 0, 15) 266 #define X86_PROPERTY_AMX_BYTES_PER_TILE KVM_X86_CPU_PROPERTY(0x1d, 1, EAX, 16, 31) 267 #define X86_PROPERTY_AMX_BYTES_PER_ROW KVM_X86_CPU_PROPERTY(0x1d, 1, EBX, 0, 15) 268 #define X86_PROPERTY_AMX_NR_TILE_REGS KVM_X86_CPU_PROPERTY(0x1d, 1, EBX, 16, 31) 269 #define X86_PROPERTY_AMX_MAX_ROWS KVM_X86_CPU_PROPERTY(0x1d, 1, ECX, 0, 15) 270 271 #define X86_PROPERTY_MAX_KVM_LEAF KVM_X86_CPU_PROPERTY(0x40000000, 0, EAX, 0, 31) 272 273 #define X86_PROPERTY_MAX_EXT_LEAF KVM_X86_CPU_PROPERTY(0x80000000, 0, EAX, 0, 31) 274 #define X86_PROPERTY_MAX_PHY_ADDR KVM_X86_CPU_PROPERTY(0x80000008, 0, EAX, 0, 7) 275 #define X86_PROPERTY_MAX_VIRT_ADDR KVM_X86_CPU_PROPERTY(0x80000008, 0, EAX, 8, 15) 276 #define X86_PROPERTY_PHYS_ADDR_REDUCTION KVM_X86_CPU_PROPERTY(0x8000001F, 0, EBX, 6, 11) 277 278 #define X86_PROPERTY_MAX_CENTAUR_LEAF KVM_X86_CPU_PROPERTY(0xC0000000, 0, EAX, 0, 31) 279 280 /* 281 * Intel's architectural PMU events are bizarre. They have a "feature" bit 282 * that indicates the feature is _not_ supported, and a property that states 283 * the length of the bit mask of unsupported features. A feature is supported 284 * if the size of the bit mask is larger than the "unavailable" bit, and said 285 * bit is not set. 286 * 287 * Wrap the "unavailable" feature to simplify checking whether or not a given 288 * architectural event is supported. 289 */ 290 struct kvm_x86_pmu_feature { 291 struct kvm_x86_cpu_feature anti_feature; 292 }; 293 #define KVM_X86_PMU_FEATURE(name, __bit) \ 294 ({ \ 295 struct kvm_x86_pmu_feature feature = { \ 296 .anti_feature = KVM_X86_CPU_FEATURE(0xa, 0, EBX, __bit), \ 297 }; \ 298 \ 299 feature; \ 300 }) 301 302 #define X86_PMU_FEATURE_BRANCH_INSNS_RETIRED KVM_X86_PMU_FEATURE(BRANCH_INSNS_RETIRED, 5) 303 304 static inline unsigned int x86_family(unsigned int eax) 305 { 306 unsigned int x86; 307 308 x86 = (eax >> 8) & 0xf; 309 310 if (x86 == 0xf) 311 x86 += (eax >> 20) & 0xff; 312 313 return x86; 314 } 315 316 static inline unsigned int x86_model(unsigned int eax) 317 { 318 return ((eax >> 12) & 0xf0) | ((eax >> 4) & 0x0f); 319 } 320 321 /* Page table bitfield declarations */ 322 #define PTE_PRESENT_MASK BIT_ULL(0) 323 #define PTE_WRITABLE_MASK BIT_ULL(1) 324 #define PTE_USER_MASK BIT_ULL(2) 325 #define PTE_ACCESSED_MASK BIT_ULL(5) 326 #define PTE_DIRTY_MASK BIT_ULL(6) 327 #define PTE_LARGE_MASK BIT_ULL(7) 328 #define PTE_GLOBAL_MASK BIT_ULL(8) 329 #define PTE_NX_MASK BIT_ULL(63) 330 331 #define PHYSICAL_PAGE_MASK GENMASK_ULL(51, 12) 332 333 #define PAGE_SHIFT 12 334 #define PAGE_SIZE (1ULL << PAGE_SHIFT) 335 #define PAGE_MASK (~(PAGE_SIZE-1) & PHYSICAL_PAGE_MASK) 336 337 #define HUGEPAGE_SHIFT(x) (PAGE_SHIFT + (((x) - 1) * 9)) 338 #define HUGEPAGE_SIZE(x) (1UL << HUGEPAGE_SHIFT(x)) 339 #define HUGEPAGE_MASK(x) (~(HUGEPAGE_SIZE(x) - 1) & PHYSICAL_PAGE_MASK) 340 341 #define PTE_GET_PA(pte) ((pte) & PHYSICAL_PAGE_MASK) 342 #define PTE_GET_PFN(pte) (PTE_GET_PA(pte) >> PAGE_SHIFT) 343 344 /* General Registers in 64-Bit Mode */ 345 struct gpr64_regs { 346 u64 rax; 347 u64 rcx; 348 u64 rdx; 349 u64 rbx; 350 u64 rsp; 351 u64 rbp; 352 u64 rsi; 353 u64 rdi; 354 u64 r8; 355 u64 r9; 356 u64 r10; 357 u64 r11; 358 u64 r12; 359 u64 r13; 360 u64 r14; 361 u64 r15; 362 }; 363 364 struct desc64 { 365 uint16_t limit0; 366 uint16_t base0; 367 unsigned base1:8, type:4, s:1, dpl:2, p:1; 368 unsigned limit1:4, avl:1, l:1, db:1, g:1, base2:8; 369 uint32_t base3; 370 uint32_t zero1; 371 } __attribute__((packed)); 372 373 struct desc_ptr { 374 uint16_t size; 375 uint64_t address; 376 } __attribute__((packed)); 377 378 struct kvm_x86_state { 379 struct kvm_xsave *xsave; 380 struct kvm_vcpu_events events; 381 struct kvm_mp_state mp_state; 382 struct kvm_regs regs; 383 struct kvm_xcrs xcrs; 384 struct kvm_sregs sregs; 385 struct kvm_debugregs debugregs; 386 union { 387 struct kvm_nested_state nested; 388 char nested_[16384]; 389 }; 390 struct kvm_msrs msrs; 391 }; 392 393 static inline uint64_t get_desc64_base(const struct desc64 *desc) 394 { 395 return ((uint64_t)desc->base3 << 32) | 396 (desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24)); 397 } 398 399 static inline uint64_t rdtsc(void) 400 { 401 uint32_t eax, edx; 402 uint64_t tsc_val; 403 /* 404 * The lfence is to wait (on Intel CPUs) until all previous 405 * instructions have been executed. If software requires RDTSC to be 406 * executed prior to execution of any subsequent instruction, it can 407 * execute LFENCE immediately after RDTSC 408 */ 409 __asm__ __volatile__("lfence; rdtsc; lfence" : "=a"(eax), "=d"(edx)); 410 tsc_val = ((uint64_t)edx) << 32 | eax; 411 return tsc_val; 412 } 413 414 static inline uint64_t rdtscp(uint32_t *aux) 415 { 416 uint32_t eax, edx; 417 418 __asm__ __volatile__("rdtscp" : "=a"(eax), "=d"(edx), "=c"(*aux)); 419 return ((uint64_t)edx) << 32 | eax; 420 } 421 422 static inline uint64_t rdmsr(uint32_t msr) 423 { 424 uint32_t a, d; 425 426 __asm__ __volatile__("rdmsr" : "=a"(a), "=d"(d) : "c"(msr) : "memory"); 427 428 return a | ((uint64_t) d << 32); 429 } 430 431 static inline void wrmsr(uint32_t msr, uint64_t value) 432 { 433 uint32_t a = value; 434 uint32_t d = value >> 32; 435 436 __asm__ __volatile__("wrmsr" :: "a"(a), "d"(d), "c"(msr) : "memory"); 437 } 438 439 440 static inline uint16_t inw(uint16_t port) 441 { 442 uint16_t tmp; 443 444 __asm__ __volatile__("in %%dx, %%ax" 445 : /* output */ "=a" (tmp) 446 : /* input */ "d" (port)); 447 448 return tmp; 449 } 450 451 static inline uint16_t get_es(void) 452 { 453 uint16_t es; 454 455 __asm__ __volatile__("mov %%es, %[es]" 456 : /* output */ [es]"=rm"(es)); 457 return es; 458 } 459 460 static inline uint16_t get_cs(void) 461 { 462 uint16_t cs; 463 464 __asm__ __volatile__("mov %%cs, %[cs]" 465 : /* output */ [cs]"=rm"(cs)); 466 return cs; 467 } 468 469 static inline uint16_t get_ss(void) 470 { 471 uint16_t ss; 472 473 __asm__ __volatile__("mov %%ss, %[ss]" 474 : /* output */ [ss]"=rm"(ss)); 475 return ss; 476 } 477 478 static inline uint16_t get_ds(void) 479 { 480 uint16_t ds; 481 482 __asm__ __volatile__("mov %%ds, %[ds]" 483 : /* output */ [ds]"=rm"(ds)); 484 return ds; 485 } 486 487 static inline uint16_t get_fs(void) 488 { 489 uint16_t fs; 490 491 __asm__ __volatile__("mov %%fs, %[fs]" 492 : /* output */ [fs]"=rm"(fs)); 493 return fs; 494 } 495 496 static inline uint16_t get_gs(void) 497 { 498 uint16_t gs; 499 500 __asm__ __volatile__("mov %%gs, %[gs]" 501 : /* output */ [gs]"=rm"(gs)); 502 return gs; 503 } 504 505 static inline uint16_t get_tr(void) 506 { 507 uint16_t tr; 508 509 __asm__ __volatile__("str %[tr]" 510 : /* output */ [tr]"=rm"(tr)); 511 return tr; 512 } 513 514 static inline uint64_t get_cr0(void) 515 { 516 uint64_t cr0; 517 518 __asm__ __volatile__("mov %%cr0, %[cr0]" 519 : /* output */ [cr0]"=r"(cr0)); 520 return cr0; 521 } 522 523 static inline uint64_t get_cr3(void) 524 { 525 uint64_t cr3; 526 527 __asm__ __volatile__("mov %%cr3, %[cr3]" 528 : /* output */ [cr3]"=r"(cr3)); 529 return cr3; 530 } 531 532 static inline uint64_t get_cr4(void) 533 { 534 uint64_t cr4; 535 536 __asm__ __volatile__("mov %%cr4, %[cr4]" 537 : /* output */ [cr4]"=r"(cr4)); 538 return cr4; 539 } 540 541 static inline void set_cr4(uint64_t val) 542 { 543 __asm__ __volatile__("mov %0, %%cr4" : : "r" (val) : "memory"); 544 } 545 546 static inline u64 xgetbv(u32 index) 547 { 548 u32 eax, edx; 549 550 __asm__ __volatile__("xgetbv;" 551 : "=a" (eax), "=d" (edx) 552 : "c" (index)); 553 return eax | ((u64)edx << 32); 554 } 555 556 static inline void xsetbv(u32 index, u64 value) 557 { 558 u32 eax = value; 559 u32 edx = value >> 32; 560 561 __asm__ __volatile__("xsetbv" :: "a" (eax), "d" (edx), "c" (index)); 562 } 563 564 static inline void wrpkru(u32 pkru) 565 { 566 /* Note, ECX and EDX are architecturally required to be '0'. */ 567 asm volatile(".byte 0x0f,0x01,0xef\n\t" 568 : : "a" (pkru), "c"(0), "d"(0)); 569 } 570 571 static inline struct desc_ptr get_gdt(void) 572 { 573 struct desc_ptr gdt; 574 __asm__ __volatile__("sgdt %[gdt]" 575 : /* output */ [gdt]"=m"(gdt)); 576 return gdt; 577 } 578 579 static inline struct desc_ptr get_idt(void) 580 { 581 struct desc_ptr idt; 582 __asm__ __volatile__("sidt %[idt]" 583 : /* output */ [idt]"=m"(idt)); 584 return idt; 585 } 586 587 static inline void outl(uint16_t port, uint32_t value) 588 { 589 __asm__ __volatile__("outl %%eax, %%dx" : : "d"(port), "a"(value)); 590 } 591 592 static inline void __cpuid(uint32_t function, uint32_t index, 593 uint32_t *eax, uint32_t *ebx, 594 uint32_t *ecx, uint32_t *edx) 595 { 596 *eax = function; 597 *ecx = index; 598 599 asm volatile("cpuid" 600 : "=a" (*eax), 601 "=b" (*ebx), 602 "=c" (*ecx), 603 "=d" (*edx) 604 : "0" (*eax), "2" (*ecx) 605 : "memory"); 606 } 607 608 static inline void cpuid(uint32_t function, 609 uint32_t *eax, uint32_t *ebx, 610 uint32_t *ecx, uint32_t *edx) 611 { 612 return __cpuid(function, 0, eax, ebx, ecx, edx); 613 } 614 615 static inline uint32_t this_cpu_fms(void) 616 { 617 uint32_t eax, ebx, ecx, edx; 618 619 cpuid(1, &eax, &ebx, &ecx, &edx); 620 return eax; 621 } 622 623 static inline uint32_t this_cpu_family(void) 624 { 625 return x86_family(this_cpu_fms()); 626 } 627 628 static inline uint32_t this_cpu_model(void) 629 { 630 return x86_model(this_cpu_fms()); 631 } 632 633 static inline bool this_cpu_vendor_string_is(const char *vendor) 634 { 635 const uint32_t *chunk = (const uint32_t *)vendor; 636 uint32_t eax, ebx, ecx, edx; 637 638 cpuid(0, &eax, &ebx, &ecx, &edx); 639 return (ebx == chunk[0] && edx == chunk[1] && ecx == chunk[2]); 640 } 641 642 static inline bool this_cpu_is_intel(void) 643 { 644 return this_cpu_vendor_string_is("GenuineIntel"); 645 } 646 647 /* 648 * Exclude early K5 samples with a vendor string of "AMDisbetter!" 649 */ 650 static inline bool this_cpu_is_amd(void) 651 { 652 return this_cpu_vendor_string_is("AuthenticAMD"); 653 } 654 655 static inline uint32_t __this_cpu_has(uint32_t function, uint32_t index, 656 uint8_t reg, uint8_t lo, uint8_t hi) 657 { 658 uint32_t gprs[4]; 659 660 __cpuid(function, index, 661 &gprs[KVM_CPUID_EAX], &gprs[KVM_CPUID_EBX], 662 &gprs[KVM_CPUID_ECX], &gprs[KVM_CPUID_EDX]); 663 664 return (gprs[reg] & GENMASK(hi, lo)) >> lo; 665 } 666 667 static inline bool this_cpu_has(struct kvm_x86_cpu_feature feature) 668 { 669 return __this_cpu_has(feature.function, feature.index, 670 feature.reg, feature.bit, feature.bit); 671 } 672 673 static inline uint32_t this_cpu_property(struct kvm_x86_cpu_property property) 674 { 675 return __this_cpu_has(property.function, property.index, 676 property.reg, property.lo_bit, property.hi_bit); 677 } 678 679 static __always_inline bool this_cpu_has_p(struct kvm_x86_cpu_property property) 680 { 681 uint32_t max_leaf; 682 683 switch (property.function & 0xc0000000) { 684 case 0: 685 max_leaf = this_cpu_property(X86_PROPERTY_MAX_BASIC_LEAF); 686 break; 687 case 0x40000000: 688 max_leaf = this_cpu_property(X86_PROPERTY_MAX_KVM_LEAF); 689 break; 690 case 0x80000000: 691 max_leaf = this_cpu_property(X86_PROPERTY_MAX_EXT_LEAF); 692 break; 693 case 0xc0000000: 694 max_leaf = this_cpu_property(X86_PROPERTY_MAX_CENTAUR_LEAF); 695 } 696 return max_leaf >= property.function; 697 } 698 699 static inline bool this_pmu_has(struct kvm_x86_pmu_feature feature) 700 { 701 uint32_t nr_bits = this_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH); 702 703 return nr_bits > feature.anti_feature.bit && 704 !this_cpu_has(feature.anti_feature); 705 } 706 707 static __always_inline uint64_t this_cpu_supported_xcr0(void) 708 { 709 if (!this_cpu_has_p(X86_PROPERTY_SUPPORTED_XCR0_LO)) 710 return 0; 711 712 return this_cpu_property(X86_PROPERTY_SUPPORTED_XCR0_LO) | 713 ((uint64_t)this_cpu_property(X86_PROPERTY_SUPPORTED_XCR0_HI) << 32); 714 } 715 716 typedef u32 __attribute__((vector_size(16))) sse128_t; 717 #define __sse128_u union { sse128_t vec; u64 as_u64[2]; u32 as_u32[4]; } 718 #define sse128_lo(x) ({ __sse128_u t; t.vec = x; t.as_u64[0]; }) 719 #define sse128_hi(x) ({ __sse128_u t; t.vec = x; t.as_u64[1]; }) 720 721 static inline void read_sse_reg(int reg, sse128_t *data) 722 { 723 switch (reg) { 724 case 0: 725 asm("movdqa %%xmm0, %0" : "=m"(*data)); 726 break; 727 case 1: 728 asm("movdqa %%xmm1, %0" : "=m"(*data)); 729 break; 730 case 2: 731 asm("movdqa %%xmm2, %0" : "=m"(*data)); 732 break; 733 case 3: 734 asm("movdqa %%xmm3, %0" : "=m"(*data)); 735 break; 736 case 4: 737 asm("movdqa %%xmm4, %0" : "=m"(*data)); 738 break; 739 case 5: 740 asm("movdqa %%xmm5, %0" : "=m"(*data)); 741 break; 742 case 6: 743 asm("movdqa %%xmm6, %0" : "=m"(*data)); 744 break; 745 case 7: 746 asm("movdqa %%xmm7, %0" : "=m"(*data)); 747 break; 748 default: 749 BUG(); 750 } 751 } 752 753 static inline void write_sse_reg(int reg, const sse128_t *data) 754 { 755 switch (reg) { 756 case 0: 757 asm("movdqa %0, %%xmm0" : : "m"(*data)); 758 break; 759 case 1: 760 asm("movdqa %0, %%xmm1" : : "m"(*data)); 761 break; 762 case 2: 763 asm("movdqa %0, %%xmm2" : : "m"(*data)); 764 break; 765 case 3: 766 asm("movdqa %0, %%xmm3" : : "m"(*data)); 767 break; 768 case 4: 769 asm("movdqa %0, %%xmm4" : : "m"(*data)); 770 break; 771 case 5: 772 asm("movdqa %0, %%xmm5" : : "m"(*data)); 773 break; 774 case 6: 775 asm("movdqa %0, %%xmm6" : : "m"(*data)); 776 break; 777 case 7: 778 asm("movdqa %0, %%xmm7" : : "m"(*data)); 779 break; 780 default: 781 BUG(); 782 } 783 } 784 785 static inline void cpu_relax(void) 786 { 787 asm volatile("rep; nop" ::: "memory"); 788 } 789 790 #define ud2() \ 791 __asm__ __volatile__( \ 792 "ud2\n" \ 793 ) 794 795 #define hlt() \ 796 __asm__ __volatile__( \ 797 "hlt\n" \ 798 ) 799 800 struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu); 801 void vcpu_load_state(struct kvm_vcpu *vcpu, struct kvm_x86_state *state); 802 void kvm_x86_state_cleanup(struct kvm_x86_state *state); 803 804 const struct kvm_msr_list *kvm_get_msr_index_list(void); 805 const struct kvm_msr_list *kvm_get_feature_msr_index_list(void); 806 bool kvm_msr_is_in_save_restore_list(uint32_t msr_index); 807 uint64_t kvm_get_feature_msr(uint64_t msr_index); 808 809 static inline void vcpu_msrs_get(struct kvm_vcpu *vcpu, 810 struct kvm_msrs *msrs) 811 { 812 int r = __vcpu_ioctl(vcpu, KVM_GET_MSRS, msrs); 813 814 TEST_ASSERT(r == msrs->nmsrs, 815 "KVM_GET_MSRS failed, r: %i (failed on MSR %x)", 816 r, r < 0 || r >= msrs->nmsrs ? -1 : msrs->entries[r].index); 817 } 818 static inline void vcpu_msrs_set(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs) 819 { 820 int r = __vcpu_ioctl(vcpu, KVM_SET_MSRS, msrs); 821 822 TEST_ASSERT(r == msrs->nmsrs, 823 "KVM_SET_MSRS failed, r: %i (failed on MSR %x)", 824 r, r < 0 || r >= msrs->nmsrs ? -1 : msrs->entries[r].index); 825 } 826 static inline void vcpu_debugregs_get(struct kvm_vcpu *vcpu, 827 struct kvm_debugregs *debugregs) 828 { 829 vcpu_ioctl(vcpu, KVM_GET_DEBUGREGS, debugregs); 830 } 831 static inline void vcpu_debugregs_set(struct kvm_vcpu *vcpu, 832 struct kvm_debugregs *debugregs) 833 { 834 vcpu_ioctl(vcpu, KVM_SET_DEBUGREGS, debugregs); 835 } 836 static inline void vcpu_xsave_get(struct kvm_vcpu *vcpu, 837 struct kvm_xsave *xsave) 838 { 839 vcpu_ioctl(vcpu, KVM_GET_XSAVE, xsave); 840 } 841 static inline void vcpu_xsave2_get(struct kvm_vcpu *vcpu, 842 struct kvm_xsave *xsave) 843 { 844 vcpu_ioctl(vcpu, KVM_GET_XSAVE2, xsave); 845 } 846 static inline void vcpu_xsave_set(struct kvm_vcpu *vcpu, 847 struct kvm_xsave *xsave) 848 { 849 vcpu_ioctl(vcpu, KVM_SET_XSAVE, xsave); 850 } 851 static inline void vcpu_xcrs_get(struct kvm_vcpu *vcpu, 852 struct kvm_xcrs *xcrs) 853 { 854 vcpu_ioctl(vcpu, KVM_GET_XCRS, xcrs); 855 } 856 static inline void vcpu_xcrs_set(struct kvm_vcpu *vcpu, struct kvm_xcrs *xcrs) 857 { 858 vcpu_ioctl(vcpu, KVM_SET_XCRS, xcrs); 859 } 860 861 const struct kvm_cpuid_entry2 *get_cpuid_entry(const struct kvm_cpuid2 *cpuid, 862 uint32_t function, uint32_t index); 863 const struct kvm_cpuid2 *kvm_get_supported_cpuid(void); 864 const struct kvm_cpuid2 *kvm_get_supported_hv_cpuid(void); 865 const struct kvm_cpuid2 *vcpu_get_supported_hv_cpuid(struct kvm_vcpu *vcpu); 866 867 static inline uint32_t kvm_cpu_fms(void) 868 { 869 return get_cpuid_entry(kvm_get_supported_cpuid(), 0x1, 0)->eax; 870 } 871 872 static inline uint32_t kvm_cpu_family(void) 873 { 874 return x86_family(kvm_cpu_fms()); 875 } 876 877 static inline uint32_t kvm_cpu_model(void) 878 { 879 return x86_model(kvm_cpu_fms()); 880 } 881 882 bool kvm_cpuid_has(const struct kvm_cpuid2 *cpuid, 883 struct kvm_x86_cpu_feature feature); 884 885 static inline bool kvm_cpu_has(struct kvm_x86_cpu_feature feature) 886 { 887 return kvm_cpuid_has(kvm_get_supported_cpuid(), feature); 888 } 889 890 uint32_t kvm_cpuid_property(const struct kvm_cpuid2 *cpuid, 891 struct kvm_x86_cpu_property property); 892 893 static inline uint32_t kvm_cpu_property(struct kvm_x86_cpu_property property) 894 { 895 return kvm_cpuid_property(kvm_get_supported_cpuid(), property); 896 } 897 898 static __always_inline bool kvm_cpu_has_p(struct kvm_x86_cpu_property property) 899 { 900 uint32_t max_leaf; 901 902 switch (property.function & 0xc0000000) { 903 case 0: 904 max_leaf = kvm_cpu_property(X86_PROPERTY_MAX_BASIC_LEAF); 905 break; 906 case 0x40000000: 907 max_leaf = kvm_cpu_property(X86_PROPERTY_MAX_KVM_LEAF); 908 break; 909 case 0x80000000: 910 max_leaf = kvm_cpu_property(X86_PROPERTY_MAX_EXT_LEAF); 911 break; 912 case 0xc0000000: 913 max_leaf = kvm_cpu_property(X86_PROPERTY_MAX_CENTAUR_LEAF); 914 } 915 return max_leaf >= property.function; 916 } 917 918 static inline bool kvm_pmu_has(struct kvm_x86_pmu_feature feature) 919 { 920 uint32_t nr_bits = kvm_cpu_property(X86_PROPERTY_PMU_EBX_BIT_VECTOR_LENGTH); 921 922 return nr_bits > feature.anti_feature.bit && 923 !kvm_cpu_has(feature.anti_feature); 924 } 925 926 static __always_inline uint64_t kvm_cpu_supported_xcr0(void) 927 { 928 if (!kvm_cpu_has_p(X86_PROPERTY_SUPPORTED_XCR0_LO)) 929 return 0; 930 931 return kvm_cpu_property(X86_PROPERTY_SUPPORTED_XCR0_LO) | 932 ((uint64_t)kvm_cpu_property(X86_PROPERTY_SUPPORTED_XCR0_HI) << 32); 933 } 934 935 static inline size_t kvm_cpuid2_size(int nr_entries) 936 { 937 return sizeof(struct kvm_cpuid2) + 938 sizeof(struct kvm_cpuid_entry2) * nr_entries; 939 } 940 941 /* 942 * Allocate a "struct kvm_cpuid2* instance, with the 0-length arrary of 943 * entries sized to hold @nr_entries. The caller is responsible for freeing 944 * the struct. 945 */ 946 static inline struct kvm_cpuid2 *allocate_kvm_cpuid2(int nr_entries) 947 { 948 struct kvm_cpuid2 *cpuid; 949 950 cpuid = malloc(kvm_cpuid2_size(nr_entries)); 951 TEST_ASSERT(cpuid, "-ENOMEM when allocating kvm_cpuid2"); 952 953 cpuid->nent = nr_entries; 954 955 return cpuid; 956 } 957 958 void vcpu_init_cpuid(struct kvm_vcpu *vcpu, const struct kvm_cpuid2 *cpuid); 959 void vcpu_set_hv_cpuid(struct kvm_vcpu *vcpu); 960 961 static inline struct kvm_cpuid_entry2 *__vcpu_get_cpuid_entry(struct kvm_vcpu *vcpu, 962 uint32_t function, 963 uint32_t index) 964 { 965 return (struct kvm_cpuid_entry2 *)get_cpuid_entry(vcpu->cpuid, 966 function, index); 967 } 968 969 static inline struct kvm_cpuid_entry2 *vcpu_get_cpuid_entry(struct kvm_vcpu *vcpu, 970 uint32_t function) 971 { 972 return __vcpu_get_cpuid_entry(vcpu, function, 0); 973 } 974 975 static inline int __vcpu_set_cpuid(struct kvm_vcpu *vcpu) 976 { 977 int r; 978 979 TEST_ASSERT(vcpu->cpuid, "Must do vcpu_init_cpuid() first"); 980 r = __vcpu_ioctl(vcpu, KVM_SET_CPUID2, vcpu->cpuid); 981 if (r) 982 return r; 983 984 /* On success, refresh the cache to pick up adjustments made by KVM. */ 985 vcpu_ioctl(vcpu, KVM_GET_CPUID2, vcpu->cpuid); 986 return 0; 987 } 988 989 static inline void vcpu_set_cpuid(struct kvm_vcpu *vcpu) 990 { 991 TEST_ASSERT(vcpu->cpuid, "Must do vcpu_init_cpuid() first"); 992 vcpu_ioctl(vcpu, KVM_SET_CPUID2, vcpu->cpuid); 993 994 /* Refresh the cache to pick up adjustments made by KVM. */ 995 vcpu_ioctl(vcpu, KVM_GET_CPUID2, vcpu->cpuid); 996 } 997 998 void vcpu_set_cpuid_maxphyaddr(struct kvm_vcpu *vcpu, uint8_t maxphyaddr); 999 1000 void vcpu_clear_cpuid_entry(struct kvm_vcpu *vcpu, uint32_t function); 1001 void vcpu_set_or_clear_cpuid_feature(struct kvm_vcpu *vcpu, 1002 struct kvm_x86_cpu_feature feature, 1003 bool set); 1004 1005 static inline void vcpu_set_cpuid_feature(struct kvm_vcpu *vcpu, 1006 struct kvm_x86_cpu_feature feature) 1007 { 1008 vcpu_set_or_clear_cpuid_feature(vcpu, feature, true); 1009 1010 } 1011 1012 static inline void vcpu_clear_cpuid_feature(struct kvm_vcpu *vcpu, 1013 struct kvm_x86_cpu_feature feature) 1014 { 1015 vcpu_set_or_clear_cpuid_feature(vcpu, feature, false); 1016 } 1017 1018 uint64_t vcpu_get_msr(struct kvm_vcpu *vcpu, uint64_t msr_index); 1019 int _vcpu_set_msr(struct kvm_vcpu *vcpu, uint64_t msr_index, uint64_t msr_value); 1020 1021 /* 1022 * Assert on an MSR access(es) and pretty print the MSR name when possible. 1023 * Note, the caller provides the stringified name so that the name of macro is 1024 * printed, not the value the macro resolves to (due to macro expansion). 1025 */ 1026 #define TEST_ASSERT_MSR(cond, fmt, msr, str, args...) \ 1027 do { \ 1028 if (__builtin_constant_p(msr)) { \ 1029 TEST_ASSERT(cond, fmt, str, args); \ 1030 } else if (!(cond)) { \ 1031 char buf[16]; \ 1032 \ 1033 snprintf(buf, sizeof(buf), "MSR 0x%x", msr); \ 1034 TEST_ASSERT(cond, fmt, buf, args); \ 1035 } \ 1036 } while (0) 1037 1038 /* 1039 * Returns true if KVM should return the last written value when reading an MSR 1040 * from userspace, e.g. the MSR isn't a command MSR, doesn't emulate state that 1041 * is changing, etc. This is NOT an exhaustive list! The intent is to filter 1042 * out MSRs that are not durable _and_ that a selftest wants to write. 1043 */ 1044 static inline bool is_durable_msr(uint32_t msr) 1045 { 1046 return msr != MSR_IA32_TSC; 1047 } 1048 1049 #define vcpu_set_msr(vcpu, msr, val) \ 1050 do { \ 1051 uint64_t r, v = val; \ 1052 \ 1053 TEST_ASSERT_MSR(_vcpu_set_msr(vcpu, msr, v) == 1, \ 1054 "KVM_SET_MSRS failed on %s, value = 0x%lx", msr, #msr, v); \ 1055 if (!is_durable_msr(msr)) \ 1056 break; \ 1057 r = vcpu_get_msr(vcpu, msr); \ 1058 TEST_ASSERT_MSR(r == v, "Set %s to '0x%lx', got back '0x%lx'", msr, #msr, v, r);\ 1059 } while (0) 1060 1061 void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits); 1062 bool vm_is_unrestricted_guest(struct kvm_vm *vm); 1063 1064 struct ex_regs { 1065 uint64_t rax, rcx, rdx, rbx; 1066 uint64_t rbp, rsi, rdi; 1067 uint64_t r8, r9, r10, r11; 1068 uint64_t r12, r13, r14, r15; 1069 uint64_t vector; 1070 uint64_t error_code; 1071 uint64_t rip; 1072 uint64_t cs; 1073 uint64_t rflags; 1074 }; 1075 1076 struct idt_entry { 1077 uint16_t offset0; 1078 uint16_t selector; 1079 uint16_t ist : 3; 1080 uint16_t : 5; 1081 uint16_t type : 4; 1082 uint16_t : 1; 1083 uint16_t dpl : 2; 1084 uint16_t p : 1; 1085 uint16_t offset1; 1086 uint32_t offset2; uint32_t reserved; 1087 }; 1088 1089 void vm_init_descriptor_tables(struct kvm_vm *vm); 1090 void vcpu_init_descriptor_tables(struct kvm_vcpu *vcpu); 1091 void vm_install_exception_handler(struct kvm_vm *vm, int vector, 1092 void (*handler)(struct ex_regs *)); 1093 1094 /* If a toddler were to say "abracadabra". */ 1095 #define KVM_EXCEPTION_MAGIC 0xabacadabaULL 1096 1097 /* 1098 * KVM selftest exception fixup uses registers to coordinate with the exception 1099 * handler, versus the kernel's in-memory tables and KVM-Unit-Tests's in-memory 1100 * per-CPU data. Using only registers avoids having to map memory into the 1101 * guest, doesn't require a valid, stable GS.base, and reduces the risk of 1102 * for recursive faults when accessing memory in the handler. The downside to 1103 * using registers is that it restricts what registers can be used by the actual 1104 * instruction. But, selftests are 64-bit only, making register* pressure a 1105 * minor concern. Use r9-r11 as they are volatile, i.e. don't need to be saved 1106 * by the callee, and except for r11 are not implicit parameters to any 1107 * instructions. Ideally, fixup would use r8-r10 and thus avoid implicit 1108 * parameters entirely, but Hyper-V's hypercall ABI uses r8 and testing Hyper-V 1109 * is higher priority than testing non-faulting SYSCALL/SYSRET. 1110 * 1111 * Note, the fixup handler deliberately does not handle #DE, i.e. the vector 1112 * is guaranteed to be non-zero on fault. 1113 * 1114 * REGISTER INPUTS: 1115 * r9 = MAGIC 1116 * r10 = RIP 1117 * r11 = new RIP on fault 1118 * 1119 * REGISTER OUTPUTS: 1120 * r9 = exception vector (non-zero) 1121 * r10 = error code 1122 */ 1123 #define KVM_ASM_SAFE(insn) \ 1124 "mov $" __stringify(KVM_EXCEPTION_MAGIC) ", %%r9\n\t" \ 1125 "lea 1f(%%rip), %%r10\n\t" \ 1126 "lea 2f(%%rip), %%r11\n\t" \ 1127 "1: " insn "\n\t" \ 1128 "xor %%r9, %%r9\n\t" \ 1129 "2:\n\t" \ 1130 "mov %%r9b, %[vector]\n\t" \ 1131 "mov %%r10, %[error_code]\n\t" 1132 1133 #define KVM_ASM_SAFE_OUTPUTS(v, ec) [vector] "=qm"(v), [error_code] "=rm"(ec) 1134 #define KVM_ASM_SAFE_CLOBBERS "r9", "r10", "r11" 1135 1136 #define kvm_asm_safe(insn, inputs...) \ 1137 ({ \ 1138 uint64_t ign_error_code; \ 1139 uint8_t vector; \ 1140 \ 1141 asm volatile(KVM_ASM_SAFE(insn) \ 1142 : KVM_ASM_SAFE_OUTPUTS(vector, ign_error_code) \ 1143 : inputs \ 1144 : KVM_ASM_SAFE_CLOBBERS); \ 1145 vector; \ 1146 }) 1147 1148 #define kvm_asm_safe_ec(insn, error_code, inputs...) \ 1149 ({ \ 1150 uint8_t vector; \ 1151 \ 1152 asm volatile(KVM_ASM_SAFE(insn) \ 1153 : KVM_ASM_SAFE_OUTPUTS(vector, error_code) \ 1154 : inputs \ 1155 : KVM_ASM_SAFE_CLOBBERS); \ 1156 vector; \ 1157 }) 1158 1159 static inline uint8_t rdmsr_safe(uint32_t msr, uint64_t *val) 1160 { 1161 uint64_t error_code; 1162 uint8_t vector; 1163 uint32_t a, d; 1164 1165 asm volatile(KVM_ASM_SAFE("rdmsr") 1166 : "=a"(a), "=d"(d), KVM_ASM_SAFE_OUTPUTS(vector, error_code) 1167 : "c"(msr) 1168 : KVM_ASM_SAFE_CLOBBERS); 1169 1170 *val = (uint64_t)a | ((uint64_t)d << 32); 1171 return vector; 1172 } 1173 1174 static inline uint8_t wrmsr_safe(uint32_t msr, uint64_t val) 1175 { 1176 return kvm_asm_safe("wrmsr", "a"(val & -1u), "d"(val >> 32), "c"(msr)); 1177 } 1178 1179 static inline uint8_t xsetbv_safe(uint32_t index, uint64_t value) 1180 { 1181 u32 eax = value; 1182 u32 edx = value >> 32; 1183 1184 return kvm_asm_safe("xsetbv", "a" (eax), "d" (edx), "c" (index)); 1185 } 1186 1187 bool kvm_is_tdp_enabled(void); 1188 1189 uint64_t *__vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr, 1190 int *level); 1191 uint64_t *vm_get_page_table_entry(struct kvm_vm *vm, uint64_t vaddr); 1192 1193 uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, 1194 uint64_t a3); 1195 uint64_t __xen_hypercall(uint64_t nr, uint64_t a0, void *a1); 1196 void xen_hypercall(uint64_t nr, uint64_t a0, void *a1); 1197 1198 static inline uint64_t __kvm_hypercall_map_gpa_range(uint64_t gpa, 1199 uint64_t size, uint64_t flags) 1200 { 1201 return kvm_hypercall(KVM_HC_MAP_GPA_RANGE, gpa, size >> PAGE_SHIFT, flags, 0); 1202 } 1203 1204 static inline void kvm_hypercall_map_gpa_range(uint64_t gpa, uint64_t size, 1205 uint64_t flags) 1206 { 1207 uint64_t ret = __kvm_hypercall_map_gpa_range(gpa, size, flags); 1208 1209 GUEST_ASSERT(!ret); 1210 } 1211 1212 void __vm_xsave_require_permission(uint64_t xfeature, const char *name); 1213 1214 #define vm_xsave_require_permission(xfeature) \ 1215 __vm_xsave_require_permission(xfeature, #xfeature) 1216 1217 enum pg_level { 1218 PG_LEVEL_NONE, 1219 PG_LEVEL_4K, 1220 PG_LEVEL_2M, 1221 PG_LEVEL_1G, 1222 PG_LEVEL_512G, 1223 PG_LEVEL_NUM 1224 }; 1225 1226 #define PG_LEVEL_SHIFT(_level) ((_level - 1) * 9 + 12) 1227 #define PG_LEVEL_SIZE(_level) (1ull << PG_LEVEL_SHIFT(_level)) 1228 1229 #define PG_SIZE_4K PG_LEVEL_SIZE(PG_LEVEL_4K) 1230 #define PG_SIZE_2M PG_LEVEL_SIZE(PG_LEVEL_2M) 1231 #define PG_SIZE_1G PG_LEVEL_SIZE(PG_LEVEL_1G) 1232 1233 void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level); 1234 void virt_map_level(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, 1235 uint64_t nr_bytes, int level); 1236 1237 /* 1238 * Basic CPU control in CR0 1239 */ 1240 #define X86_CR0_PE (1UL<<0) /* Protection Enable */ 1241 #define X86_CR0_MP (1UL<<1) /* Monitor Coprocessor */ 1242 #define X86_CR0_EM (1UL<<2) /* Emulation */ 1243 #define X86_CR0_TS (1UL<<3) /* Task Switched */ 1244 #define X86_CR0_ET (1UL<<4) /* Extension Type */ 1245 #define X86_CR0_NE (1UL<<5) /* Numeric Error */ 1246 #define X86_CR0_WP (1UL<<16) /* Write Protect */ 1247 #define X86_CR0_AM (1UL<<18) /* Alignment Mask */ 1248 #define X86_CR0_NW (1UL<<29) /* Not Write-through */ 1249 #define X86_CR0_CD (1UL<<30) /* Cache Disable */ 1250 #define X86_CR0_PG (1UL<<31) /* Paging */ 1251 1252 #define PFERR_PRESENT_BIT 0 1253 #define PFERR_WRITE_BIT 1 1254 #define PFERR_USER_BIT 2 1255 #define PFERR_RSVD_BIT 3 1256 #define PFERR_FETCH_BIT 4 1257 #define PFERR_PK_BIT 5 1258 #define PFERR_SGX_BIT 15 1259 #define PFERR_GUEST_FINAL_BIT 32 1260 #define PFERR_GUEST_PAGE_BIT 33 1261 #define PFERR_IMPLICIT_ACCESS_BIT 48 1262 1263 #define PFERR_PRESENT_MASK BIT(PFERR_PRESENT_BIT) 1264 #define PFERR_WRITE_MASK BIT(PFERR_WRITE_BIT) 1265 #define PFERR_USER_MASK BIT(PFERR_USER_BIT) 1266 #define PFERR_RSVD_MASK BIT(PFERR_RSVD_BIT) 1267 #define PFERR_FETCH_MASK BIT(PFERR_FETCH_BIT) 1268 #define PFERR_PK_MASK BIT(PFERR_PK_BIT) 1269 #define PFERR_SGX_MASK BIT(PFERR_SGX_BIT) 1270 #define PFERR_GUEST_FINAL_MASK BIT_ULL(PFERR_GUEST_FINAL_BIT) 1271 #define PFERR_GUEST_PAGE_MASK BIT_ULL(PFERR_GUEST_PAGE_BIT) 1272 #define PFERR_IMPLICIT_ACCESS BIT_ULL(PFERR_IMPLICIT_ACCESS_BIT) 1273 1274 bool sys_clocksource_is_based_on_tsc(void); 1275 1276 #endif /* SELFTEST_KVM_PROCESSOR_H */ 1277