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 14 #include <asm/msr-index.h> 15 16 #define X86_EFLAGS_FIXED (1u << 1) 17 18 #define X86_CR4_VME (1ul << 0) 19 #define X86_CR4_PVI (1ul << 1) 20 #define X86_CR4_TSD (1ul << 2) 21 #define X86_CR4_DE (1ul << 3) 22 #define X86_CR4_PSE (1ul << 4) 23 #define X86_CR4_PAE (1ul << 5) 24 #define X86_CR4_MCE (1ul << 6) 25 #define X86_CR4_PGE (1ul << 7) 26 #define X86_CR4_PCE (1ul << 8) 27 #define X86_CR4_OSFXSR (1ul << 9) 28 #define X86_CR4_OSXMMEXCPT (1ul << 10) 29 #define X86_CR4_UMIP (1ul << 11) 30 #define X86_CR4_LA57 (1ul << 12) 31 #define X86_CR4_VMXE (1ul << 13) 32 #define X86_CR4_SMXE (1ul << 14) 33 #define X86_CR4_FSGSBASE (1ul << 16) 34 #define X86_CR4_PCIDE (1ul << 17) 35 #define X86_CR4_OSXSAVE (1ul << 18) 36 #define X86_CR4_SMEP (1ul << 20) 37 #define X86_CR4_SMAP (1ul << 21) 38 #define X86_CR4_PKE (1ul << 22) 39 40 /* CPUID.1.ECX */ 41 #define CPUID_VMX (1ul << 5) 42 #define CPUID_SMX (1ul << 6) 43 #define CPUID_PCID (1ul << 17) 44 #define CPUID_XSAVE (1ul << 26) 45 46 /* CPUID.7.EBX */ 47 #define CPUID_FSGSBASE (1ul << 0) 48 #define CPUID_SMEP (1ul << 7) 49 #define CPUID_SMAP (1ul << 20) 50 51 /* CPUID.7.ECX */ 52 #define CPUID_UMIP (1ul << 2) 53 #define CPUID_PKU (1ul << 3) 54 #define CPUID_LA57 (1ul << 16) 55 56 #define UNEXPECTED_VECTOR_PORT 0xfff0u 57 58 /* General Registers in 64-Bit Mode */ 59 struct gpr64_regs { 60 u64 rax; 61 u64 rcx; 62 u64 rdx; 63 u64 rbx; 64 u64 rsp; 65 u64 rbp; 66 u64 rsi; 67 u64 rdi; 68 u64 r8; 69 u64 r9; 70 u64 r10; 71 u64 r11; 72 u64 r12; 73 u64 r13; 74 u64 r14; 75 u64 r15; 76 }; 77 78 struct desc64 { 79 uint16_t limit0; 80 uint16_t base0; 81 unsigned base1:8, type:4, s:1, dpl:2, p:1; 82 unsigned limit1:4, avl:1, l:1, db:1, g:1, base2:8; 83 uint32_t base3; 84 uint32_t zero1; 85 } __attribute__((packed)); 86 87 struct desc_ptr { 88 uint16_t size; 89 uint64_t address; 90 } __attribute__((packed)); 91 92 static inline uint64_t get_desc64_base(const struct desc64 *desc) 93 { 94 return ((uint64_t)desc->base3 << 32) | 95 (desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24)); 96 } 97 98 static inline uint64_t rdtsc(void) 99 { 100 uint32_t eax, edx; 101 uint64_t tsc_val; 102 /* 103 * The lfence is to wait (on Intel CPUs) until all previous 104 * instructions have been executed. If software requires RDTSC to be 105 * executed prior to execution of any subsequent instruction, it can 106 * execute LFENCE immediately after RDTSC 107 */ 108 __asm__ __volatile__("lfence; rdtsc; lfence" : "=a"(eax), "=d"(edx)); 109 tsc_val = ((uint64_t)edx) << 32 | eax; 110 return tsc_val; 111 } 112 113 static inline uint64_t rdtscp(uint32_t *aux) 114 { 115 uint32_t eax, edx; 116 117 __asm__ __volatile__("rdtscp" : "=a"(eax), "=d"(edx), "=c"(*aux)); 118 return ((uint64_t)edx) << 32 | eax; 119 } 120 121 static inline uint64_t rdmsr(uint32_t msr) 122 { 123 uint32_t a, d; 124 125 __asm__ __volatile__("rdmsr" : "=a"(a), "=d"(d) : "c"(msr) : "memory"); 126 127 return a | ((uint64_t) d << 32); 128 } 129 130 static inline void wrmsr(uint32_t msr, uint64_t value) 131 { 132 uint32_t a = value; 133 uint32_t d = value >> 32; 134 135 __asm__ __volatile__("wrmsr" :: "a"(a), "d"(d), "c"(msr) : "memory"); 136 } 137 138 139 static inline uint16_t inw(uint16_t port) 140 { 141 uint16_t tmp; 142 143 __asm__ __volatile__("in %%dx, %%ax" 144 : /* output */ "=a" (tmp) 145 : /* input */ "d" (port)); 146 147 return tmp; 148 } 149 150 static inline uint16_t get_es(void) 151 { 152 uint16_t es; 153 154 __asm__ __volatile__("mov %%es, %[es]" 155 : /* output */ [es]"=rm"(es)); 156 return es; 157 } 158 159 static inline uint16_t get_cs(void) 160 { 161 uint16_t cs; 162 163 __asm__ __volatile__("mov %%cs, %[cs]" 164 : /* output */ [cs]"=rm"(cs)); 165 return cs; 166 } 167 168 static inline uint16_t get_ss(void) 169 { 170 uint16_t ss; 171 172 __asm__ __volatile__("mov %%ss, %[ss]" 173 : /* output */ [ss]"=rm"(ss)); 174 return ss; 175 } 176 177 static inline uint16_t get_ds(void) 178 { 179 uint16_t ds; 180 181 __asm__ __volatile__("mov %%ds, %[ds]" 182 : /* output */ [ds]"=rm"(ds)); 183 return ds; 184 } 185 186 static inline uint16_t get_fs(void) 187 { 188 uint16_t fs; 189 190 __asm__ __volatile__("mov %%fs, %[fs]" 191 : /* output */ [fs]"=rm"(fs)); 192 return fs; 193 } 194 195 static inline uint16_t get_gs(void) 196 { 197 uint16_t gs; 198 199 __asm__ __volatile__("mov %%gs, %[gs]" 200 : /* output */ [gs]"=rm"(gs)); 201 return gs; 202 } 203 204 static inline uint16_t get_tr(void) 205 { 206 uint16_t tr; 207 208 __asm__ __volatile__("str %[tr]" 209 : /* output */ [tr]"=rm"(tr)); 210 return tr; 211 } 212 213 static inline uint64_t get_cr0(void) 214 { 215 uint64_t cr0; 216 217 __asm__ __volatile__("mov %%cr0, %[cr0]" 218 : /* output */ [cr0]"=r"(cr0)); 219 return cr0; 220 } 221 222 static inline uint64_t get_cr3(void) 223 { 224 uint64_t cr3; 225 226 __asm__ __volatile__("mov %%cr3, %[cr3]" 227 : /* output */ [cr3]"=r"(cr3)); 228 return cr3; 229 } 230 231 static inline uint64_t get_cr4(void) 232 { 233 uint64_t cr4; 234 235 __asm__ __volatile__("mov %%cr4, %[cr4]" 236 : /* output */ [cr4]"=r"(cr4)); 237 return cr4; 238 } 239 240 static inline void set_cr4(uint64_t val) 241 { 242 __asm__ __volatile__("mov %0, %%cr4" : : "r" (val) : "memory"); 243 } 244 245 static inline struct desc_ptr get_gdt(void) 246 { 247 struct desc_ptr gdt; 248 __asm__ __volatile__("sgdt %[gdt]" 249 : /* output */ [gdt]"=m"(gdt)); 250 return gdt; 251 } 252 253 static inline struct desc_ptr get_idt(void) 254 { 255 struct desc_ptr idt; 256 __asm__ __volatile__("sidt %[idt]" 257 : /* output */ [idt]"=m"(idt)); 258 return idt; 259 } 260 261 static inline void outl(uint16_t port, uint32_t value) 262 { 263 __asm__ __volatile__("outl %%eax, %%dx" : : "d"(port), "a"(value)); 264 } 265 266 #define SET_XMM(__var, __xmm) \ 267 asm volatile("movq %0, %%"#__xmm : : "r"(__var) : #__xmm) 268 269 static inline void set_xmm(int n, unsigned long val) 270 { 271 switch (n) { 272 case 0: 273 SET_XMM(val, xmm0); 274 break; 275 case 1: 276 SET_XMM(val, xmm1); 277 break; 278 case 2: 279 SET_XMM(val, xmm2); 280 break; 281 case 3: 282 SET_XMM(val, xmm3); 283 break; 284 case 4: 285 SET_XMM(val, xmm4); 286 break; 287 case 5: 288 SET_XMM(val, xmm5); 289 break; 290 case 6: 291 SET_XMM(val, xmm6); 292 break; 293 case 7: 294 SET_XMM(val, xmm7); 295 break; 296 } 297 } 298 299 typedef unsigned long v1di __attribute__ ((vector_size (8))); 300 static inline unsigned long get_xmm(int n) 301 { 302 assert(n >= 0 && n <= 7); 303 304 register v1di xmm0 __asm__("%xmm0"); 305 register v1di xmm1 __asm__("%xmm1"); 306 register v1di xmm2 __asm__("%xmm2"); 307 register v1di xmm3 __asm__("%xmm3"); 308 register v1di xmm4 __asm__("%xmm4"); 309 register v1di xmm5 __asm__("%xmm5"); 310 register v1di xmm6 __asm__("%xmm6"); 311 register v1di xmm7 __asm__("%xmm7"); 312 switch (n) { 313 case 0: 314 return (unsigned long)xmm0; 315 case 1: 316 return (unsigned long)xmm1; 317 case 2: 318 return (unsigned long)xmm2; 319 case 3: 320 return (unsigned long)xmm3; 321 case 4: 322 return (unsigned long)xmm4; 323 case 5: 324 return (unsigned long)xmm5; 325 case 6: 326 return (unsigned long)xmm6; 327 case 7: 328 return (unsigned long)xmm7; 329 } 330 return 0; 331 } 332 333 bool is_intel_cpu(void); 334 335 struct kvm_x86_state; 336 struct kvm_x86_state *vcpu_save_state(struct kvm_vm *vm, uint32_t vcpuid); 337 void vcpu_load_state(struct kvm_vm *vm, uint32_t vcpuid, 338 struct kvm_x86_state *state); 339 340 struct kvm_msr_list *kvm_get_msr_index_list(void); 341 342 struct kvm_cpuid2 *kvm_get_supported_cpuid(void); 343 void vcpu_set_cpuid(struct kvm_vm *vm, uint32_t vcpuid, 344 struct kvm_cpuid2 *cpuid); 345 346 struct kvm_cpuid_entry2 * 347 kvm_get_supported_cpuid_index(uint32_t function, uint32_t index); 348 349 static inline struct kvm_cpuid_entry2 * 350 kvm_get_supported_cpuid_entry(uint32_t function) 351 { 352 return kvm_get_supported_cpuid_index(function, 0); 353 } 354 355 uint64_t vcpu_get_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index); 356 int _vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, 357 uint64_t msr_value); 358 void vcpu_set_msr(struct kvm_vm *vm, uint32_t vcpuid, uint64_t msr_index, 359 uint64_t msr_value); 360 361 uint32_t kvm_get_cpuid_max_basic(void); 362 uint32_t kvm_get_cpuid_max_extended(void); 363 void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits); 364 365 struct ex_regs { 366 uint64_t rax, rcx, rdx, rbx; 367 uint64_t rbp, rsi, rdi; 368 uint64_t r8, r9, r10, r11; 369 uint64_t r12, r13, r14, r15; 370 uint64_t vector; 371 uint64_t error_code; 372 uint64_t rip; 373 uint64_t cs; 374 uint64_t rflags; 375 }; 376 377 void vm_init_descriptor_tables(struct kvm_vm *vm); 378 void vcpu_init_descriptor_tables(struct kvm_vm *vm, uint32_t vcpuid); 379 void vm_handle_exception(struct kvm_vm *vm, int vector, 380 void (*handler)(struct ex_regs *)); 381 382 /* 383 * set_cpuid() - overwrites a matching cpuid entry with the provided value. 384 * matches based on ent->function && ent->index. returns true 385 * if a match was found and successfully overwritten. 386 * @cpuid: the kvm cpuid list to modify. 387 * @ent: cpuid entry to insert 388 */ 389 bool set_cpuid(struct kvm_cpuid2 *cpuid, struct kvm_cpuid_entry2 *ent); 390 391 uint64_t kvm_hypercall(uint64_t nr, uint64_t a0, uint64_t a1, uint64_t a2, 392 uint64_t a3); 393 394 /* 395 * Basic CPU control in CR0 396 */ 397 #define X86_CR0_PE (1UL<<0) /* Protection Enable */ 398 #define X86_CR0_MP (1UL<<1) /* Monitor Coprocessor */ 399 #define X86_CR0_EM (1UL<<2) /* Emulation */ 400 #define X86_CR0_TS (1UL<<3) /* Task Switched */ 401 #define X86_CR0_ET (1UL<<4) /* Extension Type */ 402 #define X86_CR0_NE (1UL<<5) /* Numeric Error */ 403 #define X86_CR0_WP (1UL<<16) /* Write Protect */ 404 #define X86_CR0_AM (1UL<<18) /* Alignment Mask */ 405 #define X86_CR0_NW (1UL<<29) /* Not Write-through */ 406 #define X86_CR0_CD (1UL<<30) /* Cache Disable */ 407 #define X86_CR0_PG (1UL<<31) /* Paging */ 408 409 #define APIC_BASE_MSR 0x800 410 #define X2APIC_ENABLE (1UL << 10) 411 #define APIC_ICR 0x300 412 #define APIC_DEST_SELF 0x40000 413 #define APIC_DEST_ALLINC 0x80000 414 #define APIC_DEST_ALLBUT 0xC0000 415 #define APIC_ICR_RR_MASK 0x30000 416 #define APIC_ICR_RR_INVALID 0x00000 417 #define APIC_ICR_RR_INPROG 0x10000 418 #define APIC_ICR_RR_VALID 0x20000 419 #define APIC_INT_LEVELTRIG 0x08000 420 #define APIC_INT_ASSERT 0x04000 421 #define APIC_ICR_BUSY 0x01000 422 #define APIC_DEST_LOGICAL 0x00800 423 #define APIC_DEST_PHYSICAL 0x00000 424 #define APIC_DM_FIXED 0x00000 425 #define APIC_DM_FIXED_MASK 0x00700 426 #define APIC_DM_LOWEST 0x00100 427 #define APIC_DM_SMI 0x00200 428 #define APIC_DM_REMRD 0x00300 429 #define APIC_DM_NMI 0x00400 430 #define APIC_DM_INIT 0x00500 431 #define APIC_DM_STARTUP 0x00600 432 #define APIC_DM_EXTINT 0x00700 433 #define APIC_VECTOR_MASK 0x000FF 434 #define APIC_ICR2 0x310 435 436 /* VMX_EPT_VPID_CAP bits */ 437 #define VMX_EPT_VPID_CAP_AD_BITS (1ULL << 21) 438 439 #endif /* SELFTEST_KVM_PROCESSOR_H */ 440