1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __KVM_X86_VMX_CAPS_H 3 #define __KVM_X86_VMX_CAPS_H 4 5 #include <asm/vmx.h> 6 7 #include "../lapic.h" 8 #include "../x86.h" 9 #include "../pmu.h" 10 #include "../cpuid.h" 11 12 extern bool __read_mostly enable_vpid; 13 extern bool __read_mostly flexpriority_enabled; 14 extern bool __read_mostly enable_ept; 15 extern bool __read_mostly enable_unrestricted_guest; 16 extern bool __read_mostly enable_ept_ad_bits; 17 extern bool __read_mostly enable_pml; 18 extern bool __read_mostly enable_ipiv; 19 extern int __read_mostly pt_mode; 20 21 #define PT_MODE_SYSTEM 0 22 #define PT_MODE_HOST_GUEST 1 23 24 #define PMU_CAP_FW_WRITES (1ULL << 13) 25 #define PMU_CAP_LBR_FMT 0x3f 26 27 struct nested_vmx_msrs { 28 /* 29 * We only store the "true" versions of the VMX capability MSRs. We 30 * generate the "non-true" versions by setting the must-be-1 bits 31 * according to the SDM. 32 */ 33 u32 procbased_ctls_low; 34 u32 procbased_ctls_high; 35 u32 secondary_ctls_low; 36 u32 secondary_ctls_high; 37 u32 pinbased_ctls_low; 38 u32 pinbased_ctls_high; 39 u32 exit_ctls_low; 40 u32 exit_ctls_high; 41 u32 entry_ctls_low; 42 u32 entry_ctls_high; 43 u32 misc_low; 44 u32 misc_high; 45 u32 ept_caps; 46 u32 vpid_caps; 47 u64 basic; 48 u64 cr0_fixed0; 49 u64 cr0_fixed1; 50 u64 cr4_fixed0; 51 u64 cr4_fixed1; 52 u64 vmcs_enum; 53 u64 vmfunc_controls; 54 }; 55 56 struct vmcs_config { 57 int size; 58 u32 basic_cap; 59 u32 revision_id; 60 u32 pin_based_exec_ctrl; 61 u32 cpu_based_exec_ctrl; 62 u32 cpu_based_2nd_exec_ctrl; 63 u64 cpu_based_3rd_exec_ctrl; 64 u32 vmexit_ctrl; 65 u32 vmentry_ctrl; 66 u64 misc; 67 struct nested_vmx_msrs nested; 68 }; 69 extern struct vmcs_config vmcs_config; 70 71 struct vmx_capability { 72 u32 ept; 73 u32 vpid; 74 }; 75 extern struct vmx_capability vmx_capability; 76 77 static inline bool cpu_has_vmx_basic_inout(void) 78 { 79 return (((u64)vmcs_config.basic_cap << 32) & VMX_BASIC_INOUT); 80 } 81 82 static inline bool cpu_has_virtual_nmis(void) 83 { 84 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS && 85 vmcs_config.cpu_based_exec_ctrl & CPU_BASED_NMI_WINDOW_EXITING; 86 } 87 88 static inline bool cpu_has_vmx_preemption_timer(void) 89 { 90 return vmcs_config.pin_based_exec_ctrl & 91 PIN_BASED_VMX_PREEMPTION_TIMER; 92 } 93 94 static inline bool cpu_has_vmx_posted_intr(void) 95 { 96 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; 97 } 98 99 static inline bool cpu_has_load_ia32_efer(void) 100 { 101 return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_EFER; 102 } 103 104 static inline bool cpu_has_load_perf_global_ctrl(void) 105 { 106 return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL; 107 } 108 109 static inline bool cpu_has_vmx_mpx(void) 110 { 111 return vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS; 112 } 113 114 static inline bool cpu_has_vmx_tpr_shadow(void) 115 { 116 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; 117 } 118 119 static inline bool cpu_need_tpr_shadow(struct kvm_vcpu *vcpu) 120 { 121 return cpu_has_vmx_tpr_shadow() && lapic_in_kernel(vcpu); 122 } 123 124 static inline bool cpu_has_vmx_msr_bitmap(void) 125 { 126 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; 127 } 128 129 static inline bool cpu_has_secondary_exec_ctrls(void) 130 { 131 return vmcs_config.cpu_based_exec_ctrl & 132 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; 133 } 134 135 static inline bool cpu_has_tertiary_exec_ctrls(void) 136 { 137 return vmcs_config.cpu_based_exec_ctrl & 138 CPU_BASED_ACTIVATE_TERTIARY_CONTROLS; 139 } 140 141 static inline bool cpu_has_vmx_virtualize_apic_accesses(void) 142 { 143 return vmcs_config.cpu_based_2nd_exec_ctrl & 144 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; 145 } 146 147 static inline bool cpu_has_vmx_ept(void) 148 { 149 return vmcs_config.cpu_based_2nd_exec_ctrl & 150 SECONDARY_EXEC_ENABLE_EPT; 151 } 152 153 static inline bool vmx_umip_emulated(void) 154 { 155 return vmcs_config.cpu_based_2nd_exec_ctrl & 156 SECONDARY_EXEC_DESC; 157 } 158 159 static inline bool cpu_has_vmx_rdtscp(void) 160 { 161 return vmcs_config.cpu_based_2nd_exec_ctrl & 162 SECONDARY_EXEC_ENABLE_RDTSCP; 163 } 164 165 static inline bool cpu_has_vmx_virtualize_x2apic_mode(void) 166 { 167 return vmcs_config.cpu_based_2nd_exec_ctrl & 168 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; 169 } 170 171 static inline bool cpu_has_vmx_vpid(void) 172 { 173 return vmcs_config.cpu_based_2nd_exec_ctrl & 174 SECONDARY_EXEC_ENABLE_VPID; 175 } 176 177 static inline bool cpu_has_vmx_wbinvd_exit(void) 178 { 179 return vmcs_config.cpu_based_2nd_exec_ctrl & 180 SECONDARY_EXEC_WBINVD_EXITING; 181 } 182 183 static inline bool cpu_has_vmx_unrestricted_guest(void) 184 { 185 return vmcs_config.cpu_based_2nd_exec_ctrl & 186 SECONDARY_EXEC_UNRESTRICTED_GUEST; 187 } 188 189 static inline bool cpu_has_vmx_apic_register_virt(void) 190 { 191 return vmcs_config.cpu_based_2nd_exec_ctrl & 192 SECONDARY_EXEC_APIC_REGISTER_VIRT; 193 } 194 195 static inline bool cpu_has_vmx_virtual_intr_delivery(void) 196 { 197 return vmcs_config.cpu_based_2nd_exec_ctrl & 198 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; 199 } 200 201 static inline bool cpu_has_vmx_ple(void) 202 { 203 return vmcs_config.cpu_based_2nd_exec_ctrl & 204 SECONDARY_EXEC_PAUSE_LOOP_EXITING; 205 } 206 207 static inline bool cpu_has_vmx_rdrand(void) 208 { 209 return vmcs_config.cpu_based_2nd_exec_ctrl & 210 SECONDARY_EXEC_RDRAND_EXITING; 211 } 212 213 static inline bool cpu_has_vmx_invpcid(void) 214 { 215 return vmcs_config.cpu_based_2nd_exec_ctrl & 216 SECONDARY_EXEC_ENABLE_INVPCID; 217 } 218 219 static inline bool cpu_has_vmx_vmfunc(void) 220 { 221 return vmcs_config.cpu_based_2nd_exec_ctrl & 222 SECONDARY_EXEC_ENABLE_VMFUNC; 223 } 224 225 static inline bool cpu_has_vmx_shadow_vmcs(void) 226 { 227 /* check if the cpu supports writing r/o exit information fields */ 228 if (!(vmcs_config.misc & MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS)) 229 return false; 230 231 return vmcs_config.cpu_based_2nd_exec_ctrl & 232 SECONDARY_EXEC_SHADOW_VMCS; 233 } 234 235 static inline bool cpu_has_vmx_encls_vmexit(void) 236 { 237 return vmcs_config.cpu_based_2nd_exec_ctrl & 238 SECONDARY_EXEC_ENCLS_EXITING; 239 } 240 241 static inline bool cpu_has_vmx_rdseed(void) 242 { 243 return vmcs_config.cpu_based_2nd_exec_ctrl & 244 SECONDARY_EXEC_RDSEED_EXITING; 245 } 246 247 static inline bool cpu_has_vmx_pml(void) 248 { 249 return vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_ENABLE_PML; 250 } 251 252 static inline bool cpu_has_vmx_xsaves(void) 253 { 254 return vmcs_config.cpu_based_2nd_exec_ctrl & 255 SECONDARY_EXEC_XSAVES; 256 } 257 258 static inline bool cpu_has_vmx_waitpkg(void) 259 { 260 return vmcs_config.cpu_based_2nd_exec_ctrl & 261 SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE; 262 } 263 264 static inline bool cpu_has_vmx_tsc_scaling(void) 265 { 266 return vmcs_config.cpu_based_2nd_exec_ctrl & 267 SECONDARY_EXEC_TSC_SCALING; 268 } 269 270 static inline bool cpu_has_vmx_bus_lock_detection(void) 271 { 272 return vmcs_config.cpu_based_2nd_exec_ctrl & 273 SECONDARY_EXEC_BUS_LOCK_DETECTION; 274 } 275 276 static inline bool cpu_has_vmx_apicv(void) 277 { 278 return cpu_has_vmx_apic_register_virt() && 279 cpu_has_vmx_virtual_intr_delivery() && 280 cpu_has_vmx_posted_intr(); 281 } 282 283 static inline bool cpu_has_vmx_ipiv(void) 284 { 285 return vmcs_config.cpu_based_3rd_exec_ctrl & TERTIARY_EXEC_IPI_VIRT; 286 } 287 288 static inline bool cpu_has_vmx_flexpriority(void) 289 { 290 return cpu_has_vmx_tpr_shadow() && 291 cpu_has_vmx_virtualize_apic_accesses(); 292 } 293 294 static inline bool cpu_has_vmx_ept_execute_only(void) 295 { 296 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; 297 } 298 299 static inline bool cpu_has_vmx_ept_4levels(void) 300 { 301 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; 302 } 303 304 static inline bool cpu_has_vmx_ept_5levels(void) 305 { 306 return vmx_capability.ept & VMX_EPT_PAGE_WALK_5_BIT; 307 } 308 309 static inline bool cpu_has_vmx_ept_mt_wb(void) 310 { 311 return vmx_capability.ept & VMX_EPTP_WB_BIT; 312 } 313 314 static inline bool cpu_has_vmx_ept_2m_page(void) 315 { 316 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; 317 } 318 319 static inline bool cpu_has_vmx_ept_1g_page(void) 320 { 321 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; 322 } 323 324 static inline int ept_caps_to_lpage_level(u32 ept_caps) 325 { 326 if (ept_caps & VMX_EPT_1GB_PAGE_BIT) 327 return PG_LEVEL_1G; 328 if (ept_caps & VMX_EPT_2MB_PAGE_BIT) 329 return PG_LEVEL_2M; 330 return PG_LEVEL_4K; 331 } 332 333 static inline bool cpu_has_vmx_ept_ad_bits(void) 334 { 335 return vmx_capability.ept & VMX_EPT_AD_BIT; 336 } 337 338 static inline bool cpu_has_vmx_invept_context(void) 339 { 340 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; 341 } 342 343 static inline bool cpu_has_vmx_invept_global(void) 344 { 345 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; 346 } 347 348 static inline bool cpu_has_vmx_invvpid(void) 349 { 350 return vmx_capability.vpid & VMX_VPID_INVVPID_BIT; 351 } 352 353 static inline bool cpu_has_vmx_invvpid_individual_addr(void) 354 { 355 return vmx_capability.vpid & VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT; 356 } 357 358 static inline bool cpu_has_vmx_invvpid_single(void) 359 { 360 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; 361 } 362 363 static inline bool cpu_has_vmx_invvpid_global(void) 364 { 365 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; 366 } 367 368 static inline bool cpu_has_vmx_intel_pt(void) 369 { 370 return (vmcs_config.misc & MSR_IA32_VMX_MISC_INTEL_PT) && 371 (vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_PT_USE_GPA) && 372 (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_RTIT_CTL); 373 } 374 375 /* 376 * Processor Trace can operate in one of three modes: 377 * a. system-wide: trace both host/guest and output to host buffer 378 * b. host-only: only trace host and output to host buffer 379 * c. host-guest: trace host and guest simultaneously and output to their 380 * respective buffer 381 * 382 * KVM currently only supports (a) and (c). 383 */ 384 static inline bool vmx_pt_mode_is_system(void) 385 { 386 return pt_mode == PT_MODE_SYSTEM; 387 } 388 static inline bool vmx_pt_mode_is_host_guest(void) 389 { 390 return pt_mode == PT_MODE_HOST_GUEST; 391 } 392 393 static inline bool vmx_pebs_supported(void) 394 { 395 return boot_cpu_has(X86_FEATURE_PEBS) && kvm_pmu_cap.pebs_ept; 396 } 397 398 static inline u64 vmx_get_perf_capabilities(void) 399 { 400 u64 perf_cap = PMU_CAP_FW_WRITES; 401 struct x86_pmu_lbr lbr; 402 u64 host_perf_cap = 0; 403 404 if (!enable_pmu) 405 return 0; 406 407 if (boot_cpu_has(X86_FEATURE_PDCM)) 408 rdmsrl(MSR_IA32_PERF_CAPABILITIES, host_perf_cap); 409 410 if (x86_perf_get_lbr(&lbr) >= 0 && lbr.nr) 411 perf_cap |= host_perf_cap & PMU_CAP_LBR_FMT; 412 413 if (vmx_pebs_supported()) { 414 perf_cap |= host_perf_cap & PERF_CAP_PEBS_MASK; 415 if ((perf_cap & PERF_CAP_PEBS_FORMAT) < 4) 416 perf_cap &= ~PERF_CAP_PEBS_BASELINE; 417 } 418 419 return perf_cap; 420 } 421 422 static inline bool cpu_has_notify_vmexit(void) 423 { 424 return vmcs_config.cpu_based_2nd_exec_ctrl & 425 SECONDARY_EXEC_NOTIFY_VM_EXITING; 426 } 427 428 #endif /* __KVM_X86_VMX_CAPS_H */ 429