tools/testing/selftests/kvm/x86_64/hyperv_features.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2021, Red Hat, Inc.
   4  *
   5  * Tests for Hyper-V features enablement
   6  */
   7 #include <asm/kvm_para.h>
   8 #include <linux/kvm_para.h>
   9 #include <stdint.h>
  10
  11 #include "test_util.h"
  12 #include "kvm_util.h"
  13 #include "processor.h"
  14 #include "hyperv.h"
  15
  16 /*
  17  * HYPERV_CPUID_ENLIGHTMENT_INFO.EBX is not a 'feature' CPUID leaf
  18  * but to activate the feature it is sufficient to set it to a non-zero
  19  * value. Use BIT(0) for that.
  20  */
  21 #define HV_PV_SPINLOCKS_TEST            \
  22         KVM_X86_CPU_FEATURE(HYPERV_CPUID_ENLIGHTMENT_INFO, 0, EBX, 0)
  23
  24 struct msr_data {
  25         uint32_t idx;
  26         bool fault_expected;
  27         bool write;
  28         u64 write_val;
  29 };
  30
  31 struct hcall_data {
  32         uint64_t control;
  33         uint64_t expect;
  34         bool ud_expected;
  35 };
  36
  37 static bool is_write_only_msr(uint32_t msr)
  38 {
  39         return msr == HV_X64_MSR_EOI;
  40 }
  41
  42 static void guest_msr(struct msr_data *msr)
  43 {
  44         uint8_t vector = 0;
  45         uint64_t msr_val = 0;
  46
  47         GUEST_ASSERT(msr->idx);
  48
  49         if (msr->write)
  50                 vector = wrmsr_safe(msr->idx, msr->write_val);
  51
  52         if (!vector && (!msr->write || !is_write_only_msr(msr->idx)))
  53                 vector = rdmsr_safe(msr->idx, &msr_val);
  54
  55         if (msr->fault_expected)
  56                 __GUEST_ASSERT(vector == GP_VECTOR,
  57                                "Expected #GP on %sMSR(0x%x), got vector '0x%x'",
  58                                msr->write ? "WR" : "RD", msr->idx, vector);
  59         else
  60                 __GUEST_ASSERT(!vector,
  61                                "Expected success on %sMSR(0x%x), got vector '0x%x'",
  62                                msr->write ? "WR" : "RD", msr->idx, vector);
  63
  64         if (vector || is_write_only_msr(msr->idx))
  65                 goto done;
  66
  67         if (msr->write)
  68                 __GUEST_ASSERT(!vector,
  69                                "WRMSR(0x%x) to '0x%lx', RDMSR read '0x%lx'",
  70                                msr->idx, msr->write_val, msr_val);
  71
  72         /* Invariant TSC bit appears when TSC invariant control MSR is written to */
  73         if (msr->idx == HV_X64_MSR_TSC_INVARIANT_CONTROL) {
  74                 if (!this_cpu_has(HV_ACCESS_TSC_INVARIANT))
  75                         GUEST_ASSERT(this_cpu_has(X86_FEATURE_INVTSC));
  76                 else
  77                         GUEST_ASSERT(this_cpu_has(X86_FEATURE_INVTSC) ==
  78                                      !!(msr_val & HV_INVARIANT_TSC_EXPOSED));
  79         }
  80
  81 done:
  82         GUEST_DONE();
  83 }
  84
  85 static void guest_hcall(vm_vaddr_t pgs_gpa, struct hcall_data *hcall)
  86 {
  87         u64 res, input, output;
  88         uint8_t vector;
  89
  90         GUEST_ASSERT_NE(hcall->control, 0);
  91
  92         wrmsr(HV_X64_MSR_GUEST_OS_ID, HYPERV_LINUX_OS_ID);
  93         wrmsr(HV_X64_MSR_HYPERCALL, pgs_gpa);
  94
  95         if (!(hcall->control & HV_HYPERCALL_FAST_BIT)) {
  96                 input = pgs_gpa;
  97                 output = pgs_gpa + 4096;
  98         } else {
  99                 input = output = 0;
 100         }
 101
 102         vector = __hyperv_hypercall(hcall->control, input, output, &res);
 103         if (hcall->ud_expected) {
 104                 __GUEST_ASSERT(vector == UD_VECTOR,
 105                                "Expected #UD for control '%lu', got vector '0x%x'",
 106                                hcall->control, vector);
 107         } else {
 108                 __GUEST_ASSERT(!vector,
 109                                "Expected no exception for control '%lu', got vector '0x%x'",
 110                                hcall->control, vector);
 111                 GUEST_ASSERT_EQ(res, hcall->expect);
 112         }
 113
 114         GUEST_DONE();
 115 }
 116
 117 static void vcpu_reset_hv_cpuid(struct kvm_vcpu *vcpu)
 118 {
 119         /*
 120          * Enable all supported Hyper-V features, then clear the leafs holding
 121          * the features that will be tested one by one.
 122          */
 123         vcpu_set_hv_cpuid(vcpu);
 124
 125         vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_FEATURES);
 126         vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_ENLIGHTMENT_INFO);
 127         vcpu_clear_cpuid_entry(vcpu, HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES);
 128 }
 129
 130 static void guest_test_msrs_access(void)
 131 {
 132         struct kvm_cpuid2 *prev_cpuid = NULL;
 133         struct kvm_vcpu *vcpu;
 134         struct kvm_vm *vm;
 135         struct ucall uc;
 136         int stage = 0;
 137         vm_vaddr_t msr_gva;
 138         struct msr_data *msr;
 139         bool has_invtsc = kvm_cpu_has(X86_FEATURE_INVTSC);
 140
 141         while (true) {
 142                 vm = vm_create_with_one_vcpu(&vcpu, guest_msr);
 143
 144                 msr_gva = vm_vaddr_alloc_page(vm);
 145                 memset(addr_gva2hva(vm, msr_gva), 0x0, getpagesize());
 146                 msr = addr_gva2hva(vm, msr_gva);
 147
 148                 vcpu_args_set(vcpu, 1, msr_gva);
 149                 vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_ENFORCE_CPUID, 1);
 150
 151                 if (!prev_cpuid) {
 152                         vcpu_reset_hv_cpuid(vcpu);
 153
 154                         prev_cpuid = allocate_kvm_cpuid2(vcpu->cpuid->nent);
 155                 } else {
 156                         vcpu_init_cpuid(vcpu, prev_cpuid);
 157                 }
 158
 159                 vm_init_descriptor_tables(vm);
 160                 vcpu_init_descriptor_tables(vcpu);
 161
 162                 /* TODO: Make this entire test easier to maintain. */
 163                 if (stage >= 21)
 164                         vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_SYNIC2, 0);
 165
 166                 switch (stage) {
 167                 case 0:
 168                         /*
 169                          * Only available when Hyper-V identification is set
 170                          */
 171                         msr->idx = HV_X64_MSR_GUEST_OS_ID;
 172                         msr->write = false;
 173                         msr->fault_expected = true;
 174                         break;
 175                 case 1:
 176                         msr->idx = HV_X64_MSR_HYPERCALL;
 177                         msr->write = false;
 178                         msr->fault_expected = true;
 179                         break;
 180                 case 2:
 181                         vcpu_set_cpuid_feature(vcpu, HV_MSR_HYPERCALL_AVAILABLE);
 182                         /*
 183                          * HV_X64_MSR_GUEST_OS_ID has to be written first to make
 184                          * HV_X64_MSR_HYPERCALL available.
 185                          */
 186                         msr->idx = HV_X64_MSR_GUEST_OS_ID;
 187                         msr->write = true;
 188                         msr->write_val = HYPERV_LINUX_OS_ID;
 189                         msr->fault_expected = false;
 190                         break;
 191                 case 3:
 192                         msr->idx = HV_X64_MSR_GUEST_OS_ID;
 193                         msr->write = false;
 194                         msr->fault_expected = false;
 195                         break;
 196                 case 4:
 197                         msr->idx = HV_X64_MSR_HYPERCALL;
 198                         msr->write = false;
 199                         msr->fault_expected = false;
 200                         break;
 201
 202                 case 5:
 203                         msr->idx = HV_X64_MSR_VP_RUNTIME;
 204                         msr->write = false;
 205                         msr->fault_expected = true;
 206                         break;
 207                 case 6:
 208                         vcpu_set_cpuid_feature(vcpu, HV_MSR_VP_RUNTIME_AVAILABLE);
 209                         msr->idx = HV_X64_MSR_VP_RUNTIME;
 210                         msr->write = false;
 211                         msr->fault_expected = false;
 212                         break;
 213                 case 7:
 214                         /* Read only */
 215                         msr->idx = HV_X64_MSR_VP_RUNTIME;
 216                         msr->write = true;
 217                         msr->write_val = 1;
 218                         msr->fault_expected = true;
 219                         break;
 220
 221                 case 8:
 222                         msr->idx = HV_X64_MSR_TIME_REF_COUNT;
 223                         msr->write = false;
 224                         msr->fault_expected = true;
 225                         break;
 226                 case 9:
 227                         vcpu_set_cpuid_feature(vcpu, HV_MSR_TIME_REF_COUNT_AVAILABLE);
 228                         msr->idx = HV_X64_MSR_TIME_REF_COUNT;
 229                         msr->write = false;
 230                         msr->fault_expected = false;
 231                         break;
 232                 case 10:
 233                         /* Read only */
 234                         msr->idx = HV_X64_MSR_TIME_REF_COUNT;
 235                         msr->write = true;
 236                         msr->write_val = 1;
 237                         msr->fault_expected = true;
 238                         break;
 239
 240                 case 11:
 241                         msr->idx = HV_X64_MSR_VP_INDEX;
 242                         msr->write = false;
 243                         msr->fault_expected = true;
 244                         break;
 245                 case 12:
 246                         vcpu_set_cpuid_feature(vcpu, HV_MSR_VP_INDEX_AVAILABLE);
 247                         msr->idx = HV_X64_MSR_VP_INDEX;
 248                         msr->write = false;
 249                         msr->fault_expected = false;
 250                         break;
 251                 case 13:
 252                         /* Read only */
 253                         msr->idx = HV_X64_MSR_VP_INDEX;
 254                         msr->write = true;
 255                         msr->write_val = 1;
 256                         msr->fault_expected = true;
 257                         break;
 258
 259                 case 14:
 260                         msr->idx = HV_X64_MSR_RESET;
 261                         msr->write = false;
 262                         msr->fault_expected = true;
 263                         break;
 264                 case 15:
 265                         vcpu_set_cpuid_feature(vcpu, HV_MSR_RESET_AVAILABLE);
 266                         msr->idx = HV_X64_MSR_RESET;
 267                         msr->write = false;
 268                         msr->fault_expected = false;
 269                         break;
 270                 case 16:
 271                         msr->idx = HV_X64_MSR_RESET;
 272                         msr->write = true;
 273                         /*
 274                          * TODO: the test only writes '0' to HV_X64_MSR_RESET
 275                          * at the moment, writing some other value there will
 276                          * trigger real vCPU reset and the code is not prepared
 277                          * to handle it yet.
 278                          */
 279                         msr->write_val = 0;
 280                         msr->fault_expected = false;
 281                         break;
 282
 283                 case 17:
 284                         msr->idx = HV_X64_MSR_REFERENCE_TSC;
 285                         msr->write = false;
 286                         msr->fault_expected = true;
 287                         break;
 288                 case 18:
 289                         vcpu_set_cpuid_feature(vcpu, HV_MSR_REFERENCE_TSC_AVAILABLE);
 290                         msr->idx = HV_X64_MSR_REFERENCE_TSC;
 291                         msr->write = false;
 292                         msr->fault_expected = false;
 293                         break;
 294                 case 19:
 295                         msr->idx = HV_X64_MSR_REFERENCE_TSC;
 296                         msr->write = true;
 297                         msr->write_val = 0;
 298                         msr->fault_expected = false;
 299                         break;
 300
 301                 case 20:
 302                         msr->idx = HV_X64_MSR_EOM;
 303                         msr->write = false;
 304                         msr->fault_expected = true;
 305                         break;
 306                 case 21:
 307                         /*
 308                          * Remains unavailable even with KVM_CAP_HYPERV_SYNIC2
 309                          * capability enabled and guest visible CPUID bit unset.
 310                          */
 311                         msr->idx = HV_X64_MSR_EOM;
 312                         msr->write = false;
 313                         msr->fault_expected = true;
 314                         break;
 315                 case 22:
 316                         vcpu_set_cpuid_feature(vcpu, HV_MSR_SYNIC_AVAILABLE);
 317                         msr->idx = HV_X64_MSR_EOM;
 318                         msr->write = false;
 319                         msr->fault_expected = false;
 320                         break;
 321                 case 23:
 322                         msr->idx = HV_X64_MSR_EOM;
 323                         msr->write = true;
 324                         msr->write_val = 0;
 325                         msr->fault_expected = false;
 326                         break;
 327
 328                 case 24:
 329                         msr->idx = HV_X64_MSR_STIMER0_CONFIG;
 330                         msr->write = false;
 331                         msr->fault_expected = true;
 332                         break;
 333                 case 25:
 334                         vcpu_set_cpuid_feature(vcpu, HV_MSR_SYNTIMER_AVAILABLE);
 335                         msr->idx = HV_X64_MSR_STIMER0_CONFIG;
 336                         msr->write = false;
 337                         msr->fault_expected = false;
 338                         break;
 339                 case 26:
 340                         msr->idx = HV_X64_MSR_STIMER0_CONFIG;
 341                         msr->write = true;
 342                         msr->write_val = 0;
 343                         msr->fault_expected = false;
 344                         break;
 345                 case 27:
 346                         /* Direct mode test */
 347                         msr->idx = HV_X64_MSR_STIMER0_CONFIG;
 348                         msr->write = true;
 349                         msr->write_val = 1 << 12;
 350                         msr->fault_expected = true;
 351                         break;
 352                 case 28:
 353                         vcpu_set_cpuid_feature(vcpu, HV_STIMER_DIRECT_MODE_AVAILABLE);
 354                         msr->idx = HV_X64_MSR_STIMER0_CONFIG;
 355                         msr->write = true;
 356                         msr->write_val = 1 << 12;
 357                         msr->fault_expected = false;
 358                         break;
 359
 360                 case 29:
 361                         msr->idx = HV_X64_MSR_EOI;
 362                         msr->write = false;
 363                         msr->fault_expected = true;
 364                         break;
 365                 case 30:
 366                         vcpu_set_cpuid_feature(vcpu, HV_MSR_APIC_ACCESS_AVAILABLE);
 367                         msr->idx = HV_X64_MSR_EOI;
 368                         msr->write = true;
 369                         msr->write_val = 1;
 370                         msr->fault_expected = false;
 371                         break;
 372
 373                 case 31:
 374                         msr->idx = HV_X64_MSR_TSC_FREQUENCY;
 375                         msr->write = false;
 376                         msr->fault_expected = true;
 377                         break;
 378                 case 32:
 379                         vcpu_set_cpuid_feature(vcpu, HV_ACCESS_FREQUENCY_MSRS);
 380                         msr->idx = HV_X64_MSR_TSC_FREQUENCY;
 381                         msr->write = false;
 382                         msr->fault_expected = false;
 383                         break;
 384                 case 33:
 385                         /* Read only */
 386                         msr->idx = HV_X64_MSR_TSC_FREQUENCY;
 387                         msr->write = true;
 388                         msr->write_val = 1;
 389                         msr->fault_expected = true;
 390                         break;
 391
 392                 case 34:
 393                         msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
 394                         msr->write = false;
 395                         msr->fault_expected = true;
 396                         break;
 397                 case 35:
 398                         vcpu_set_cpuid_feature(vcpu, HV_ACCESS_REENLIGHTENMENT);
 399                         msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
 400                         msr->write = false;
 401                         msr->fault_expected = false;
 402                         break;
 403                 case 36:
 404                         msr->idx = HV_X64_MSR_REENLIGHTENMENT_CONTROL;
 405                         msr->write = true;
 406                         msr->write_val = 1;
 407                         msr->fault_expected = false;
 408                         break;
 409                 case 37:
 410                         /* Can only write '0' */
 411                         msr->idx = HV_X64_MSR_TSC_EMULATION_STATUS;
 412                         msr->write = true;
 413                         msr->write_val = 1;
 414                         msr->fault_expected = true;
 415                         break;
 416
 417                 case 38:
 418                         msr->idx = HV_X64_MSR_CRASH_P0;
 419                         msr->write = false;
 420                         msr->fault_expected = true;
 421                         break;
 422                 case 39:
 423                         vcpu_set_cpuid_feature(vcpu, HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE);
 424                         msr->idx = HV_X64_MSR_CRASH_P0;
 425                         msr->write = false;
 426                         msr->fault_expected = false;
 427                         break;
 428                 case 40:
 429                         msr->idx = HV_X64_MSR_CRASH_P0;
 430                         msr->write = true;
 431                         msr->write_val = 1;
 432                         msr->fault_expected = false;
 433                         break;
 434
 435                 case 41:
 436                         msr->idx = HV_X64_MSR_SYNDBG_STATUS;
 437                         msr->write = false;
 438                         msr->fault_expected = true;
 439                         break;
 440                 case 42:
 441                         vcpu_set_cpuid_feature(vcpu, HV_FEATURE_DEBUG_MSRS_AVAILABLE);
 442                         vcpu_set_cpuid_feature(vcpu, HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING);
 443                         msr->idx = HV_X64_MSR_SYNDBG_STATUS;
 444                         msr->write = false;
 445                         msr->fault_expected = false;
 446                         break;
 447                 case 43:
 448                         msr->idx = HV_X64_MSR_SYNDBG_STATUS;
 449                         msr->write = true;
 450                         msr->write_val = 0;
 451                         msr->fault_expected = false;
 452                         break;
 453
 454                 case 44:
 455                         /* MSR is not available when CPUID feature bit is unset */
 456                         if (!has_invtsc)
 457                                 continue;
 458                         msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL;
 459                         msr->write = false;
 460                         msr->fault_expected = true;
 461                         break;
 462                 case 45:
 463                         /* MSR is vailable when CPUID feature bit is set */
 464                         if (!has_invtsc)
 465                                 continue;
 466                         vcpu_set_cpuid_feature(vcpu, HV_ACCESS_TSC_INVARIANT);
 467                         msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL;
 468                         msr->write = false;
 469                         msr->fault_expected = false;
 470                         break;
 471                 case 46:
 472                         /* Writing bits other than 0 is forbidden */
 473                         if (!has_invtsc)
 474                                 continue;
 475                         msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL;
 476                         msr->write = true;
 477                         msr->write_val = 0xdeadbeef;
 478                         msr->fault_expected = true;
 479                         break;
 480                 case 47:
 481                         /* Setting bit 0 enables the feature */
 482                         if (!has_invtsc)
 483                                 continue;
 484                         msr->idx = HV_X64_MSR_TSC_INVARIANT_CONTROL;
 485                         msr->write = true;
 486                         msr->write_val = 1;
 487                         msr->fault_expected = false;
 488                         break;
 489
 490                 default:
 491                         kvm_vm_free(vm);
 492                         return;
 493                 }
 494
 495                 vcpu_set_cpuid(vcpu);
 496
 497                 memcpy(prev_cpuid, vcpu->cpuid, kvm_cpuid2_size(vcpu->cpuid->nent));
 498
 499                 pr_debug("Stage %d: testing msr: 0x%x for %s\n", stage,
 500                          msr->idx, msr->write ? "write" : "read");
 501
 502                 vcpu_run(vcpu);
 503                 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
 504
 505                 switch (get_ucall(vcpu, &uc)) {
 506                 case UCALL_ABORT:
 507                         REPORT_GUEST_ASSERT(uc);
 508                         return;
 509                 case UCALL_DONE:
 510                         break;
 511                 default:
 512                         TEST_FAIL("Unhandled ucall: %ld", uc.cmd);
 513                         return;
 514                 }
 515
 516                 stage++;
 517                 kvm_vm_free(vm);
 518         }
 519 }
 520
 521 static void guest_test_hcalls_access(void)
 522 {
 523         struct kvm_cpuid2 *prev_cpuid = NULL;
 524         struct kvm_vcpu *vcpu;
 525         struct kvm_vm *vm;
 526         struct ucall uc;
 527         int stage = 0;
 528         vm_vaddr_t hcall_page, hcall_params;
 529         struct hcall_data *hcall;
 530
 531         while (true) {
 532                 vm = vm_create_with_one_vcpu(&vcpu, guest_hcall);
 533
 534                 vm_init_descriptor_tables(vm);
 535                 vcpu_init_descriptor_tables(vcpu);
 536
 537                 /* Hypercall input/output */
 538                 hcall_page = vm_vaddr_alloc_pages(vm, 2);
 539                 memset(addr_gva2hva(vm, hcall_page), 0x0, 2 * getpagesize());
 540
 541                 hcall_params = vm_vaddr_alloc_page(vm);
 542                 memset(addr_gva2hva(vm, hcall_params), 0x0, getpagesize());
 543                 hcall = addr_gva2hva(vm, hcall_params);
 544
 545                 vcpu_args_set(vcpu, 2, addr_gva2gpa(vm, hcall_page), hcall_params);
 546                 vcpu_enable_cap(vcpu, KVM_CAP_HYPERV_ENFORCE_CPUID, 1);
 547
 548                 if (!prev_cpuid) {
 549                         vcpu_reset_hv_cpuid(vcpu);
 550
 551                         prev_cpuid = allocate_kvm_cpuid2(vcpu->cpuid->nent);
 552                 } else {
 553                         vcpu_init_cpuid(vcpu, prev_cpuid);
 554                 }
 555
 556                 switch (stage) {
 557                 case 0:
 558                         vcpu_set_cpuid_feature(vcpu, HV_MSR_HYPERCALL_AVAILABLE);
 559                         hcall->control = 0xbeef;
 560                         hcall->expect = HV_STATUS_INVALID_HYPERCALL_CODE;
 561                         break;
 562
 563                 case 1:
 564                         hcall->control = HVCALL_POST_MESSAGE;
 565                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 566                         break;
 567                 case 2:
 568                         vcpu_set_cpuid_feature(vcpu, HV_POST_MESSAGES);
 569                         hcall->control = HVCALL_POST_MESSAGE;
 570                         hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
 571                         break;
 572
 573                 case 3:
 574                         hcall->control = HVCALL_SIGNAL_EVENT;
 575                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 576                         break;
 577                 case 4:
 578                         vcpu_set_cpuid_feature(vcpu, HV_SIGNAL_EVENTS);
 579                         hcall->control = HVCALL_SIGNAL_EVENT;
 580                         hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
 581                         break;
 582
 583                 case 5:
 584                         hcall->control = HVCALL_RESET_DEBUG_SESSION;
 585                         hcall->expect = HV_STATUS_INVALID_HYPERCALL_CODE;
 586                         break;
 587                 case 6:
 588                         vcpu_set_cpuid_feature(vcpu, HV_X64_SYNDBG_CAP_ALLOW_KERNEL_DEBUGGING);
 589                         hcall->control = HVCALL_RESET_DEBUG_SESSION;
 590                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 591                         break;
 592                 case 7:
 593                         vcpu_set_cpuid_feature(vcpu, HV_DEBUGGING);
 594                         hcall->control = HVCALL_RESET_DEBUG_SESSION;
 595                         hcall->expect = HV_STATUS_OPERATION_DENIED;
 596                         break;
 597
 598                 case 8:
 599                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE;
 600                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 601                         break;
 602                 case 9:
 603                         vcpu_set_cpuid_feature(vcpu, HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED);
 604                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE;
 605                         hcall->expect = HV_STATUS_SUCCESS;
 606                         break;
 607                 case 10:
 608                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX;
 609                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 610                         break;
 611                 case 11:
 612                         vcpu_set_cpuid_feature(vcpu, HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED);
 613                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX;
 614                         hcall->expect = HV_STATUS_SUCCESS;
 615                         break;
 616
 617                 case 12:
 618                         hcall->control = HVCALL_SEND_IPI;
 619                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 620                         break;
 621                 case 13:
 622                         vcpu_set_cpuid_feature(vcpu, HV_X64_CLUSTER_IPI_RECOMMENDED);
 623                         hcall->control = HVCALL_SEND_IPI;
 624                         hcall->expect = HV_STATUS_INVALID_HYPERCALL_INPUT;
 625                         break;
 626                 case 14:
 627                         /* Nothing in 'sparse banks' -> success */
 628                         hcall->control = HVCALL_SEND_IPI_EX;
 629                         hcall->expect = HV_STATUS_SUCCESS;
 630                         break;
 631
 632                 case 15:
 633                         hcall->control = HVCALL_NOTIFY_LONG_SPIN_WAIT;
 634                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 635                         break;
 636                 case 16:
 637                         vcpu_set_cpuid_feature(vcpu, HV_PV_SPINLOCKS_TEST);
 638                         hcall->control = HVCALL_NOTIFY_LONG_SPIN_WAIT;
 639                         hcall->expect = HV_STATUS_SUCCESS;
 640                         break;
 641                 case 17:
 642                         /* XMM fast hypercall */
 643                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT;
 644                         hcall->ud_expected = true;
 645                         break;
 646                 case 18:
 647                         vcpu_set_cpuid_feature(vcpu, HV_X64_HYPERCALL_XMM_INPUT_AVAILABLE);
 648                         hcall->control = HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE | HV_HYPERCALL_FAST_BIT;
 649                         hcall->ud_expected = false;
 650                         hcall->expect = HV_STATUS_SUCCESS;
 651                         break;
 652                 case 19:
 653                         hcall->control = HV_EXT_CALL_QUERY_CAPABILITIES;
 654                         hcall->expect = HV_STATUS_ACCESS_DENIED;
 655                         break;
 656                 case 20:
 657                         vcpu_set_cpuid_feature(vcpu, HV_ENABLE_EXTENDED_HYPERCALLS);
 658                         hcall->control = HV_EXT_CALL_QUERY_CAPABILITIES | HV_HYPERCALL_FAST_BIT;
 659                         hcall->expect = HV_STATUS_INVALID_PARAMETER;
 660                         break;
 661                 case 21:
 662                         kvm_vm_free(vm);
 663                         return;
 664                 }
 665
 666                 vcpu_set_cpuid(vcpu);
 667
 668                 memcpy(prev_cpuid, vcpu->cpuid, kvm_cpuid2_size(vcpu->cpuid->nent));
 669
 670                 pr_debug("Stage %d: testing hcall: 0x%lx\n", stage, hcall->control);
 671
 672                 vcpu_run(vcpu);
 673                 TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);
 674
 675                 switch (get_ucall(vcpu, &uc)) {
 676                 case UCALL_ABORT:
 677                         REPORT_GUEST_ASSERT(uc);
 678                         return;
 679                 case UCALL_DONE:
 680                         break;
 681                 default:
 682                         TEST_FAIL("Unhandled ucall: %ld", uc.cmd);
 683                         return;
 684                 }
 685
 686                 stage++;
 687                 kvm_vm_free(vm);
 688         }
 689 }
 690
 691 int main(void)
 692 {
 693         TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENFORCE_CPUID));
 694
 695         pr_info("Testing access to Hyper-V specific MSRs\n");
 696         guest_test_msrs_access();
 697
 698         pr_info("Testing access to Hyper-V hypercalls\n");
 699         guest_test_hcalls_access();
 700 }