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 9 extern bool __read_mostly enable_vpid; 10 extern bool __read_mostly flexpriority_enabled; 11 extern bool __read_mostly enable_ept; 12 extern bool __read_mostly enable_unrestricted_guest; 13 extern bool __read_mostly enable_ept_ad_bits; 14 extern bool __read_mostly enable_pml; 15 extern int __read_mostly pt_mode; 16 17 #define PT_MODE_SYSTEM 0 18 #define PT_MODE_HOST_GUEST 1 19 20 #define PMU_CAP_FW_WRITES (1ULL << 13) 21 #define PMU_CAP_LBR_FMT 0x3f 22 23 #define DEBUGCTLMSR_LBR_MASK (DEBUGCTLMSR_LBR | DEBUGCTLMSR_FREEZE_LBRS_ON_PMI) 24 25 struct nested_vmx_msrs { 26 /* 27 * We only store the "true" versions of the VMX capability MSRs. We 28 * generate the "non-true" versions by setting the must-be-1 bits 29 * according to the SDM. 30 */ 31 u32 procbased_ctls_low; 32 u32 procbased_ctls_high; 33 u32 secondary_ctls_low; 34 u32 secondary_ctls_high; 35 u32 pinbased_ctls_low; 36 u32 pinbased_ctls_high; 37 u32 exit_ctls_low; 38 u32 exit_ctls_high; 39 u32 entry_ctls_low; 40 u32 entry_ctls_high; 41 u32 misc_low; 42 u32 misc_high; 43 u32 ept_caps; 44 u32 vpid_caps; 45 u64 basic; 46 u64 cr0_fixed0; 47 u64 cr0_fixed1; 48 u64 cr4_fixed0; 49 u64 cr4_fixed1; 50 u64 vmcs_enum; 51 u64 vmfunc_controls; 52 }; 53 54 struct vmcs_config { 55 int size; 56 int order; 57 u32 basic_cap; 58 u32 revision_id; 59 u32 pin_based_exec_ctrl; 60 u32 cpu_based_exec_ctrl; 61 u32 cpu_based_2nd_exec_ctrl; 62 u32 vmexit_ctrl; 63 u32 vmentry_ctrl; 64 struct nested_vmx_msrs nested; 65 }; 66 extern struct vmcs_config vmcs_config; 67 68 struct vmx_capability { 69 u32 ept; 70 u32 vpid; 71 }; 72 extern struct vmx_capability vmx_capability; 73 74 static inline bool cpu_has_vmx_basic_inout(void) 75 { 76 return (((u64)vmcs_config.basic_cap << 32) & VMX_BASIC_INOUT); 77 } 78 79 static inline bool cpu_has_virtual_nmis(void) 80 { 81 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS; 82 } 83 84 static inline bool cpu_has_vmx_preemption_timer(void) 85 { 86 return vmcs_config.pin_based_exec_ctrl & 87 PIN_BASED_VMX_PREEMPTION_TIMER; 88 } 89 90 static inline bool cpu_has_vmx_posted_intr(void) 91 { 92 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_POSTED_INTR; 93 } 94 95 static inline bool cpu_has_load_ia32_efer(void) 96 { 97 return (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_EFER) && 98 (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_EFER); 99 } 100 101 static inline bool cpu_has_load_perf_global_ctrl(void) 102 { 103 return (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL) && 104 (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL); 105 } 106 107 static inline bool cpu_has_vmx_mpx(void) 108 { 109 return (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_BNDCFGS) && 110 (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_BNDCFGS); 111 } 112 113 static inline bool cpu_has_vmx_tpr_shadow(void) 114 { 115 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW; 116 } 117 118 static inline bool cpu_need_tpr_shadow(struct kvm_vcpu *vcpu) 119 { 120 return cpu_has_vmx_tpr_shadow() && lapic_in_kernel(vcpu); 121 } 122 123 static inline bool cpu_has_vmx_msr_bitmap(void) 124 { 125 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS; 126 } 127 128 static inline bool cpu_has_secondary_exec_ctrls(void) 129 { 130 return vmcs_config.cpu_based_exec_ctrl & 131 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS; 132 } 133 134 static inline bool cpu_has_vmx_virtualize_apic_accesses(void) 135 { 136 return vmcs_config.cpu_based_2nd_exec_ctrl & 137 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES; 138 } 139 140 static inline bool cpu_has_vmx_ept(void) 141 { 142 return vmcs_config.cpu_based_2nd_exec_ctrl & 143 SECONDARY_EXEC_ENABLE_EPT; 144 } 145 146 static inline bool vmx_umip_emulated(void) 147 { 148 return vmcs_config.cpu_based_2nd_exec_ctrl & 149 SECONDARY_EXEC_DESC; 150 } 151 152 static inline bool cpu_has_vmx_rdtscp(void) 153 { 154 return vmcs_config.cpu_based_2nd_exec_ctrl & 155 SECONDARY_EXEC_ENABLE_RDTSCP; 156 } 157 158 static inline bool cpu_has_vmx_virtualize_x2apic_mode(void) 159 { 160 return vmcs_config.cpu_based_2nd_exec_ctrl & 161 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE; 162 } 163 164 static inline bool cpu_has_vmx_vpid(void) 165 { 166 return vmcs_config.cpu_based_2nd_exec_ctrl & 167 SECONDARY_EXEC_ENABLE_VPID; 168 } 169 170 static inline bool cpu_has_vmx_wbinvd_exit(void) 171 { 172 return vmcs_config.cpu_based_2nd_exec_ctrl & 173 SECONDARY_EXEC_WBINVD_EXITING; 174 } 175 176 static inline bool cpu_has_vmx_unrestricted_guest(void) 177 { 178 return vmcs_config.cpu_based_2nd_exec_ctrl & 179 SECONDARY_EXEC_UNRESTRICTED_GUEST; 180 } 181 182 static inline bool cpu_has_vmx_apic_register_virt(void) 183 { 184 return vmcs_config.cpu_based_2nd_exec_ctrl & 185 SECONDARY_EXEC_APIC_REGISTER_VIRT; 186 } 187 188 static inline bool cpu_has_vmx_virtual_intr_delivery(void) 189 { 190 return vmcs_config.cpu_based_2nd_exec_ctrl & 191 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY; 192 } 193 194 static inline bool cpu_has_vmx_ple(void) 195 { 196 return vmcs_config.cpu_based_2nd_exec_ctrl & 197 SECONDARY_EXEC_PAUSE_LOOP_EXITING; 198 } 199 200 static inline bool cpu_has_vmx_rdrand(void) 201 { 202 return vmcs_config.cpu_based_2nd_exec_ctrl & 203 SECONDARY_EXEC_RDRAND_EXITING; 204 } 205 206 static inline bool cpu_has_vmx_invpcid(void) 207 { 208 return vmcs_config.cpu_based_2nd_exec_ctrl & 209 SECONDARY_EXEC_ENABLE_INVPCID; 210 } 211 212 static inline bool cpu_has_vmx_vmfunc(void) 213 { 214 return vmcs_config.cpu_based_2nd_exec_ctrl & 215 SECONDARY_EXEC_ENABLE_VMFUNC; 216 } 217 218 static inline bool cpu_has_vmx_shadow_vmcs(void) 219 { 220 u64 vmx_msr; 221 222 /* check if the cpu supports writing r/o exit information fields */ 223 rdmsrl(MSR_IA32_VMX_MISC, vmx_msr); 224 if (!(vmx_msr & MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS)) 225 return false; 226 227 return vmcs_config.cpu_based_2nd_exec_ctrl & 228 SECONDARY_EXEC_SHADOW_VMCS; 229 } 230 231 static inline bool cpu_has_vmx_encls_vmexit(void) 232 { 233 return vmcs_config.cpu_based_2nd_exec_ctrl & 234 SECONDARY_EXEC_ENCLS_EXITING; 235 } 236 237 static inline bool cpu_has_vmx_rdseed(void) 238 { 239 return vmcs_config.cpu_based_2nd_exec_ctrl & 240 SECONDARY_EXEC_RDSEED_EXITING; 241 } 242 243 static inline bool cpu_has_vmx_pml(void) 244 { 245 return vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_ENABLE_PML; 246 } 247 248 static inline bool cpu_has_vmx_xsaves(void) 249 { 250 return vmcs_config.cpu_based_2nd_exec_ctrl & 251 SECONDARY_EXEC_XSAVES; 252 } 253 254 static inline bool cpu_has_vmx_waitpkg(void) 255 { 256 return vmcs_config.cpu_based_2nd_exec_ctrl & 257 SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE; 258 } 259 260 static inline bool cpu_has_vmx_tsc_scaling(void) 261 { 262 return vmcs_config.cpu_based_2nd_exec_ctrl & 263 SECONDARY_EXEC_TSC_SCALING; 264 } 265 266 static inline bool cpu_has_vmx_bus_lock_detection(void) 267 { 268 return vmcs_config.cpu_based_2nd_exec_ctrl & 269 SECONDARY_EXEC_BUS_LOCK_DETECTION; 270 } 271 272 static inline bool cpu_has_vmx_apicv(void) 273 { 274 return cpu_has_vmx_apic_register_virt() && 275 cpu_has_vmx_virtual_intr_delivery() && 276 cpu_has_vmx_posted_intr(); 277 } 278 279 static inline bool cpu_has_vmx_flexpriority(void) 280 { 281 return cpu_has_vmx_tpr_shadow() && 282 cpu_has_vmx_virtualize_apic_accesses(); 283 } 284 285 static inline bool cpu_has_vmx_ept_execute_only(void) 286 { 287 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT; 288 } 289 290 static inline bool cpu_has_vmx_ept_4levels(void) 291 { 292 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT; 293 } 294 295 static inline bool cpu_has_vmx_ept_5levels(void) 296 { 297 return vmx_capability.ept & VMX_EPT_PAGE_WALK_5_BIT; 298 } 299 300 static inline bool cpu_has_vmx_ept_mt_wb(void) 301 { 302 return vmx_capability.ept & VMX_EPTP_WB_BIT; 303 } 304 305 static inline bool cpu_has_vmx_ept_2m_page(void) 306 { 307 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT; 308 } 309 310 static inline bool cpu_has_vmx_ept_1g_page(void) 311 { 312 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT; 313 } 314 315 static inline int ept_caps_to_lpage_level(u32 ept_caps) 316 { 317 if (ept_caps & VMX_EPT_1GB_PAGE_BIT) 318 return PG_LEVEL_1G; 319 if (ept_caps & VMX_EPT_2MB_PAGE_BIT) 320 return PG_LEVEL_2M; 321 return PG_LEVEL_4K; 322 } 323 324 static inline bool cpu_has_vmx_ept_ad_bits(void) 325 { 326 return vmx_capability.ept & VMX_EPT_AD_BIT; 327 } 328 329 static inline bool cpu_has_vmx_invept_context(void) 330 { 331 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT; 332 } 333 334 static inline bool cpu_has_vmx_invept_global(void) 335 { 336 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT; 337 } 338 339 static inline bool cpu_has_vmx_invvpid(void) 340 { 341 return vmx_capability.vpid & VMX_VPID_INVVPID_BIT; 342 } 343 344 static inline bool cpu_has_vmx_invvpid_individual_addr(void) 345 { 346 return vmx_capability.vpid & VMX_VPID_EXTENT_INDIVIDUAL_ADDR_BIT; 347 } 348 349 static inline bool cpu_has_vmx_invvpid_single(void) 350 { 351 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT; 352 } 353 354 static inline bool cpu_has_vmx_invvpid_global(void) 355 { 356 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT; 357 } 358 359 static inline bool cpu_has_vmx_intel_pt(void) 360 { 361 u64 vmx_msr; 362 363 rdmsrl(MSR_IA32_VMX_MISC, vmx_msr); 364 return (vmx_msr & MSR_IA32_VMX_MISC_INTEL_PT) && 365 (vmcs_config.cpu_based_2nd_exec_ctrl & SECONDARY_EXEC_PT_USE_GPA) && 366 (vmcs_config.vmexit_ctrl & VM_EXIT_CLEAR_IA32_RTIT_CTL) && 367 (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_RTIT_CTL); 368 } 369 370 /* 371 * Processor Trace can operate in one of three modes: 372 * a. system-wide: trace both host/guest and output to host buffer 373 * b. host-only: only trace host and output to host buffer 374 * c. host-guest: trace host and guest simultaneously and output to their 375 * respective buffer 376 * 377 * KVM currently only supports (a) and (c). 378 */ 379 static inline bool vmx_pt_mode_is_system(void) 380 { 381 return pt_mode == PT_MODE_SYSTEM; 382 } 383 static inline bool vmx_pt_mode_is_host_guest(void) 384 { 385 return pt_mode == PT_MODE_HOST_GUEST; 386 } 387 388 static inline u64 vmx_get_perf_capabilities(void) 389 { 390 u64 perf_cap = 0; 391 392 if (boot_cpu_has(X86_FEATURE_PDCM)) 393 rdmsrl(MSR_IA32_PERF_CAPABILITIES, perf_cap); 394 395 perf_cap &= PMU_CAP_LBR_FMT; 396 397 /* 398 * Since counters are virtualized, KVM would support full 399 * width counting unconditionally, even if the host lacks it. 400 */ 401 return PMU_CAP_FW_WRITES | perf_cap; 402 } 403 404 static inline u64 vmx_supported_debugctl(void) 405 { 406 u64 debugctl = 0; 407 408 if (boot_cpu_has(X86_FEATURE_BUS_LOCK_DETECT)) 409 debugctl |= DEBUGCTLMSR_BUS_LOCK_DETECT; 410 411 if (vmx_get_perf_capabilities() & PMU_CAP_LBR_FMT) 412 debugctl |= DEBUGCTLMSR_LBR_MASK; 413 414 return debugctl; 415 } 416 417 #endif /* __KVM_X86_VMX_CAPS_H */ 418