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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * svm_vmcall_test
   4  *
   5  * Copyright © 2021 Amazon.com, Inc. or its affiliates.
   6  *
   7  * Xen shared_info / pvclock testing
   8  */
   9
  10 #include "test_util.h"
  11 #include "kvm_util.h"
  12 #include "processor.h"
  13
  14 #include <stdint.h>
  15 #include <time.h>
  16 #include <sched.h>
  17 #include <signal.h>
  18
  19 #include <sys/eventfd.h>
  20
  21 #define VCPU_ID         5
  22
  23 #define SHINFO_REGION_GVA       0xc0000000ULL
  24 #define SHINFO_REGION_GPA       0xc0000000ULL
  25 #define SHINFO_REGION_SLOT      10
  26
  27 #define DUMMY_REGION_GPA        (SHINFO_REGION_GPA + (2 * PAGE_SIZE))
  28 #define DUMMY_REGION_SLOT       11
  29
  30 #define SHINFO_ADDR     (SHINFO_REGION_GPA)
  31 #define PVTIME_ADDR     (SHINFO_REGION_GPA + PAGE_SIZE)
  32 #define RUNSTATE_ADDR   (SHINFO_REGION_GPA + PAGE_SIZE + 0x20)
  33 #define VCPU_INFO_ADDR  (SHINFO_REGION_GPA + 0x40)
  34
  35 #define SHINFO_VADDR    (SHINFO_REGION_GVA)
  36 #define RUNSTATE_VADDR  (SHINFO_REGION_GVA + PAGE_SIZE + 0x20)
  37 #define VCPU_INFO_VADDR (SHINFO_REGION_GVA + 0x40)
  38
  39 #define EVTCHN_VECTOR   0x10
  40
  41 static struct kvm_vm *vm;
  42
  43 #define XEN_HYPERCALL_MSR       0x40000000
  44
  45 #define MIN_STEAL_TIME          50000
  46
  47 struct pvclock_vcpu_time_info {
  48         u32   version;
  49         u32   pad0;
  50         u64   tsc_timestamp;
  51         u64   system_time;
  52         u32   tsc_to_system_mul;
  53         s8    tsc_shift;
  54         u8    flags;
  55         u8    pad[2];
  56 } __attribute__((__packed__)); /* 32 bytes */
  57
  58 struct pvclock_wall_clock {
  59         u32   version;
  60         u32   sec;
  61         u32   nsec;
  62 } __attribute__((__packed__));
  63
  64 struct vcpu_runstate_info {
  65     uint32_t state;
  66     uint64_t state_entry_time;
  67     uint64_t time[4];
  68 };
  69
  70 struct arch_vcpu_info {
  71     unsigned long cr2;
  72     unsigned long pad; /* sizeof(vcpu_info_t) == 64 */
  73 };
  74
  75 struct vcpu_info {
  76         uint8_t evtchn_upcall_pending;
  77         uint8_t evtchn_upcall_mask;
  78         unsigned long evtchn_pending_sel;
  79         struct arch_vcpu_info arch;
  80         struct pvclock_vcpu_time_info time;
  81 }; /* 64 bytes (x86) */
  82
  83 struct shared_info {
  84         struct vcpu_info vcpu_info[32];
  85         unsigned long evtchn_pending[64];
  86         unsigned long evtchn_mask[64];
  87         struct pvclock_wall_clock wc;
  88         uint32_t wc_sec_hi;
  89         /* arch_shared_info here */
  90 };
  91
  92 #define RUNSTATE_running  0
  93 #define RUNSTATE_runnable 1
  94 #define RUNSTATE_blocked  2
  95 #define RUNSTATE_offline  3
  96
  97 static const char *runstate_names[] = {
  98         "running",
  99         "runnable",
 100         "blocked",
 101         "offline"
 102 };
 103
 104 struct {
 105         struct kvm_irq_routing info;
 106         struct kvm_irq_routing_entry entries[2];
 107 } irq_routes;
 108
 109 static void evtchn_handler(struct ex_regs *regs)
 110 {
 111         struct vcpu_info *vi = (void *)VCPU_INFO_VADDR;
 112         vi->evtchn_upcall_pending = 0;
 113         vi->evtchn_pending_sel = 0;
 114
 115         GUEST_SYNC(0x20);
 116 }
 117
 118 static void guest_code(void)
 119 {
 120         struct vcpu_runstate_info *rs = (void *)RUNSTATE_VADDR;
 121
 122         __asm__ __volatile__(
 123                 "sti\n"
 124                 "nop\n"
 125         );
 126
 127         /* Trigger an interrupt injection */
 128         GUEST_SYNC(0);
 129
 130         /* Test having the host set runstates manually */
 131         GUEST_SYNC(RUNSTATE_runnable);
 132         GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0);
 133         GUEST_ASSERT(rs->state == 0);
 134
 135         GUEST_SYNC(RUNSTATE_blocked);
 136         GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0);
 137         GUEST_ASSERT(rs->state == 0);
 138
 139         GUEST_SYNC(RUNSTATE_offline);
 140         GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0);
 141         GUEST_ASSERT(rs->state == 0);
 142
 143         /* Test runstate time adjust */
 144         GUEST_SYNC(4);
 145         GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a);
 146         GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b);
 147
 148         /* Test runstate time set */
 149         GUEST_SYNC(5);
 150         GUEST_ASSERT(rs->state_entry_time >= 0x8000);
 151         GUEST_ASSERT(rs->time[RUNSTATE_runnable] == 0);
 152         GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x6b6b);
 153         GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x5a);
 154
 155         /* sched_yield() should result in some 'runnable' time */
 156         GUEST_SYNC(6);
 157         GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME);
 158
 159         /* Attempt to deliver a *masked* interrupt */
 160         GUEST_SYNC(7);
 161
 162         /* Wait until we see the bit set */
 163         struct shared_info *si = (void *)SHINFO_VADDR;
 164         while (!si->evtchn_pending[0])
 165                 __asm__ __volatile__ ("rep nop" : : : "memory");
 166
 167         /* Now deliver an *unmasked* interrupt */
 168         GUEST_SYNC(8);
 169
 170         while (!si->evtchn_pending[1])
 171                 __asm__ __volatile__ ("rep nop" : : : "memory");
 172
 173         /* Change memslots and deliver an interrupt */
 174         GUEST_SYNC(9);
 175
 176         for (;;)
 177                 __asm__ __volatile__ ("rep nop" : : : "memory");
 178 }
 179
 180 static int cmp_timespec(struct timespec *a, struct timespec *b)
 181 {
 182         if (a->tv_sec > b->tv_sec)
 183                 return 1;
 184         else if (a->tv_sec < b->tv_sec)
 185                 return -1;
 186         else if (a->tv_nsec > b->tv_nsec)
 187                 return 1;
 188         else if (a->tv_nsec < b->tv_nsec)
 189                 return -1;
 190         else
 191                 return 0;
 192 }
 193
 194 static void handle_alrm(int sig)
 195 {
 196         TEST_FAIL("IRQ delivery timed out");
 197 }
 198
 199 int main(int argc, char *argv[])
 200 {
 201         struct timespec min_ts, max_ts, vm_ts;
 202         bool verbose;
 203
 204         verbose = argc > 1 && (!strncmp(argv[1], "-v", 3) ||
 205                                !strncmp(argv[1], "--verbose", 10));
 206
 207         int xen_caps = kvm_check_cap(KVM_CAP_XEN_HVM);
 208         if (!(xen_caps & KVM_XEN_HVM_CONFIG_SHARED_INFO) ) {
 209                 print_skip("KVM_XEN_HVM_CONFIG_SHARED_INFO not available");
 210                 exit(KSFT_SKIP);
 211         }
 212
 213         bool do_runstate_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE);
 214         bool do_eventfd_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_EVTCHN_2LEVEL);
 215
 216         clock_gettime(CLOCK_REALTIME, &min_ts);
 217
 218         vm = vm_create_default(VCPU_ID, 0, (void *) guest_code);
 219         vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 220
 221         /* Map a region for the shared_info page */
 222         vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
 223                                     SHINFO_REGION_GPA, SHINFO_REGION_SLOT, 2, 0);
 224         virt_map(vm, SHINFO_REGION_GVA, SHINFO_REGION_GPA, 2);
 225
 226         struct shared_info *shinfo = addr_gpa2hva(vm, SHINFO_VADDR);
 227
 228         int zero_fd = open("/dev/zero", O_RDONLY);
 229         TEST_ASSERT(zero_fd != -1, "Failed to open /dev/zero");
 230
 231         struct kvm_xen_hvm_config hvmc = {
 232                 .flags = KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL,
 233                 .msr = XEN_HYPERCALL_MSR,
 234         };
 235         vm_ioctl(vm, KVM_XEN_HVM_CONFIG, &hvmc);
 236
 237         struct kvm_xen_hvm_attr lm = {
 238                 .type = KVM_XEN_ATTR_TYPE_LONG_MODE,
 239                 .u.long_mode = 1,
 240         };
 241         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &lm);
 242
 243         struct kvm_xen_hvm_attr ha = {
 244                 .type = KVM_XEN_ATTR_TYPE_SHARED_INFO,
 245                 .u.shared_info.gfn = SHINFO_REGION_GPA / PAGE_SIZE,
 246         };
 247         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &ha);
 248
 249         /*
 250          * Test what happens when the HVA of the shinfo page is remapped after
 251          * the kernel has a reference to it. But make sure we copy the clock
 252          * info over since that's only set at setup time, and we test it later.
 253          */
 254         struct pvclock_wall_clock wc_copy = shinfo->wc;
 255         void *m = mmap(shinfo, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED|MAP_PRIVATE, zero_fd, 0);
 256         TEST_ASSERT(m == shinfo, "Failed to map /dev/zero over shared info");
 257         shinfo->wc = wc_copy;
 258
 259         struct kvm_xen_vcpu_attr vi = {
 260                 .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO,
 261                 .u.gpa = VCPU_INFO_ADDR,
 262         };
 263         vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &vi);
 264
 265         struct kvm_xen_vcpu_attr pvclock = {
 266                 .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO,
 267                 .u.gpa = PVTIME_ADDR,
 268         };
 269         vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &pvclock);
 270
 271         struct kvm_xen_hvm_attr vec = {
 272                 .type = KVM_XEN_ATTR_TYPE_UPCALL_VECTOR,
 273                 .u.vector = EVTCHN_VECTOR,
 274         };
 275         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &vec);
 276
 277         vm_init_descriptor_tables(vm);
 278         vcpu_init_descriptor_tables(vm, VCPU_ID);
 279         vm_install_exception_handler(vm, EVTCHN_VECTOR, evtchn_handler);
 280
 281         if (do_runstate_tests) {
 282                 struct kvm_xen_vcpu_attr st = {
 283                         .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
 284                         .u.gpa = RUNSTATE_ADDR,
 285                 };
 286                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &st);
 287         }
 288
 289         int irq_fd[2] = { -1, -1 };
 290
 291         if (do_eventfd_tests) {
 292                 irq_fd[0] = eventfd(0, 0);
 293                 irq_fd[1] = eventfd(0, 0);
 294
 295                 /* Unexpected, but not a KVM failure */
 296                 if (irq_fd[0] == -1 || irq_fd[1] == -1)
 297                         do_eventfd_tests = false;
 298         }
 299
 300         if (do_eventfd_tests) {
 301                 irq_routes.info.nr = 2;
 302
 303                 irq_routes.entries[0].gsi = 32;
 304                 irq_routes.entries[0].type = KVM_IRQ_ROUTING_XEN_EVTCHN;
 305                 irq_routes.entries[0].u.xen_evtchn.port = 15;
 306                 irq_routes.entries[0].u.xen_evtchn.vcpu = VCPU_ID;
 307                 irq_routes.entries[0].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL;
 308
 309                 irq_routes.entries[1].gsi = 33;
 310                 irq_routes.entries[1].type = KVM_IRQ_ROUTING_XEN_EVTCHN;
 311                 irq_routes.entries[1].u.xen_evtchn.port = 66;
 312                 irq_routes.entries[1].u.xen_evtchn.vcpu = VCPU_ID;
 313                 irq_routes.entries[1].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL;
 314
 315                 vm_ioctl(vm, KVM_SET_GSI_ROUTING, &irq_routes);
 316
 317                 struct kvm_irqfd ifd = { };
 318
 319                 ifd.fd = irq_fd[0];
 320                 ifd.gsi = 32;
 321                 vm_ioctl(vm, KVM_IRQFD, &ifd);
 322
 323                 ifd.fd = irq_fd[1];
 324                 ifd.gsi = 33;
 325                 vm_ioctl(vm, KVM_IRQFD, &ifd);
 326
 327                 struct sigaction sa = { };
 328                 sa.sa_handler = handle_alrm;
 329                 sigaction(SIGALRM, &sa, NULL);
 330         }
 331
 332         struct vcpu_info *vinfo = addr_gpa2hva(vm, VCPU_INFO_VADDR);
 333         vinfo->evtchn_upcall_pending = 0;
 334
 335         struct vcpu_runstate_info *rs = addr_gpa2hva(vm, RUNSTATE_ADDR);
 336         rs->state = 0x5a;
 337
 338         bool evtchn_irq_expected = false;
 339
 340         for (;;) {
 341                 volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
 342                 struct ucall uc;
 343
 344                 vcpu_run(vm, VCPU_ID);
 345
 346                 TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
 347                             "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
 348                             run->exit_reason,
 349                             exit_reason_str(run->exit_reason));
 350
 351                 switch (get_ucall(vm, VCPU_ID, &uc)) {
 352                 case UCALL_ABORT:
 353                         TEST_FAIL("%s", (const char *)uc.args[0]);
 354                         /* NOT REACHED */
 355                 case UCALL_SYNC: {
 356                         struct kvm_xen_vcpu_attr rst;
 357                         long rundelay;
 358
 359                         if (do_runstate_tests)
 360                                 TEST_ASSERT(rs->state_entry_time == rs->time[0] +
 361                                             rs->time[1] + rs->time[2] + rs->time[3],
 362                                             "runstate times don't add up");
 363
 364                         switch (uc.args[1]) {
 365                         case 0:
 366                                 if (verbose)
 367                                         printf("Delivering evtchn upcall\n");
 368                                 evtchn_irq_expected = true;
 369                                 vinfo->evtchn_upcall_pending = 1;
 370                                 break;
 371
 372                         case RUNSTATE_runnable...RUNSTATE_offline:
 373                                 TEST_ASSERT(!evtchn_irq_expected, "Event channel IRQ not seen");
 374                                 if (!do_runstate_tests)
 375                                         goto done;
 376                                 if (verbose)
 377                                         printf("Testing runstate %s\n", runstate_names[uc.args[1]]);
 378                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT;
 379                                 rst.u.runstate.state = uc.args[1];
 380                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 381                                 break;
 382
 383                         case 4:
 384                                 if (verbose)
 385                                         printf("Testing RUNSTATE_ADJUST\n");
 386                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST;
 387                                 memset(&rst.u, 0, sizeof(rst.u));
 388                                 rst.u.runstate.state = (uint64_t)-1;
 389                                 rst.u.runstate.time_blocked =
 390                                         0x5a - rs->time[RUNSTATE_blocked];
 391                                 rst.u.runstate.time_offline =
 392                                         0x6b6b - rs->time[RUNSTATE_offline];
 393                                 rst.u.runstate.time_runnable = -rst.u.runstate.time_blocked -
 394                                         rst.u.runstate.time_offline;
 395                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 396                                 break;
 397
 398                         case 5:
 399                                 if (verbose)
 400                                         printf("Testing RUNSTATE_DATA\n");
 401                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA;
 402                                 memset(&rst.u, 0, sizeof(rst.u));
 403                                 rst.u.runstate.state = RUNSTATE_running;
 404                                 rst.u.runstate.state_entry_time = 0x6b6b + 0x5a;
 405                                 rst.u.runstate.time_blocked = 0x6b6b;
 406                                 rst.u.runstate.time_offline = 0x5a;
 407                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 408                                 break;
 409
 410                         case 6:
 411                                 if (verbose)
 412                                         printf("Testing steal time\n");
 413                                 /* Yield until scheduler delay exceeds target */
 414                                 rundelay = get_run_delay() + MIN_STEAL_TIME;
 415                                 do {
 416                                         sched_yield();
 417                                 } while (get_run_delay() < rundelay);
 418                                 break;
 419
 420                         case 7:
 421                                 if (!do_eventfd_tests)
 422                                         goto done;
 423                                 if (verbose)
 424                                         printf("Testing masked event channel\n");
 425                                 shinfo->evtchn_mask[0] = 0x8000;
 426                                 eventfd_write(irq_fd[0], 1UL);
 427                                 alarm(1);
 428                                 break;
 429
 430                         case 8:
 431                                 if (verbose)
 432                                         printf("Testing unmasked event channel\n");
 433                                 /* Unmask that, but deliver the other one */
 434                                 shinfo->evtchn_pending[0] = 0;
 435                                 shinfo->evtchn_mask[0] = 0;
 436                                 eventfd_write(irq_fd[1], 1UL);
 437                                 evtchn_irq_expected = true;
 438                                 alarm(1);
 439                                 break;
 440
 441                         case 9:
 442                                 if (verbose)
 443                                         printf("Testing event channel after memslot change\n");
 444                                 vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
 445                                                             DUMMY_REGION_GPA, DUMMY_REGION_SLOT, 1, 0);
 446                                 eventfd_write(irq_fd[0], 1UL);
 447                                 evtchn_irq_expected = true;
 448                                 alarm(1);
 449                                 break;
 450
 451                         case 0x20:
 452                                 TEST_ASSERT(evtchn_irq_expected, "Unexpected event channel IRQ");
 453                                 evtchn_irq_expected = false;
 454                                 if (shinfo->evtchn_pending[1] &&
 455                                     shinfo->evtchn_pending[0])
 456                                         goto done;
 457                                 break;
 458                         }
 459                         break;
 460                 }
 461                 case UCALL_DONE:
 462                         goto done;
 463                 default:
 464                         TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);
 465                 }
 466         }
 467
 468  done:
 469         clock_gettime(CLOCK_REALTIME, &max_ts);
 470
 471         /*
 472          * Just a *really* basic check that things are being put in the
 473          * right place. The actual calculations are much the same for
 474          * Xen as they are for the KVM variants, so no need to check.
 475          */
 476         struct pvclock_wall_clock *wc;
 477         struct pvclock_vcpu_time_info *ti, *ti2;
 478
 479         wc = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0xc00);
 480         ti = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0x40 + 0x20);
 481         ti2 = addr_gpa2hva(vm, PVTIME_ADDR);
 482
 483         if (verbose) {
 484                 printf("Wall clock (v %d) %d.%09d\n", wc->version, wc->sec, wc->nsec);
 485                 printf("Time info 1: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n",
 486                        ti->version, ti->tsc_timestamp, ti->system_time, ti->tsc_to_system_mul,
 487                        ti->tsc_shift, ti->flags);
 488                 printf("Time info 2: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n",
 489                        ti2->version, ti2->tsc_timestamp, ti2->system_time, ti2->tsc_to_system_mul,
 490                        ti2->tsc_shift, ti2->flags);
 491         }
 492
 493         vm_ts.tv_sec = wc->sec;
 494         vm_ts.tv_nsec = wc->nsec;
 495         TEST_ASSERT(wc->version && !(wc->version & 1),
 496                     "Bad wallclock version %x", wc->version);
 497         TEST_ASSERT(cmp_timespec(&min_ts, &vm_ts) <= 0, "VM time too old");
 498         TEST_ASSERT(cmp_timespec(&max_ts, &vm_ts) >= 0, "VM time too new");
 499
 500         TEST_ASSERT(ti->version && !(ti->version & 1),
 501                     "Bad time_info version %x", ti->version);
 502         TEST_ASSERT(ti2->version && !(ti2->version & 1),
 503                     "Bad time_info version %x", ti->version);
 504
 505         if (do_runstate_tests) {
 506                 /*
 507                  * Fetch runstate and check sanity. Strictly speaking in the
 508                  * general case we might not expect the numbers to be identical
 509                  * but in this case we know we aren't running the vCPU any more.
 510                  */
 511                 struct kvm_xen_vcpu_attr rst = {
 512                         .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA,
 513                 };
 514                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &rst);
 515
 516                 if (verbose) {
 517                         printf("Runstate: %s(%d), entry %" PRIu64 " ns\n",
 518                                rs->state <= RUNSTATE_offline ? runstate_names[rs->state] : "unknown",
 519                                rs->state, rs->state_entry_time);
 520                         for (int i = RUNSTATE_running; i <= RUNSTATE_offline; i++) {
 521                                 printf("State %s: %" PRIu64 " ns\n",
 522                                        runstate_names[i], rs->time[i]);
 523                         }
 524                 }
 525                 TEST_ASSERT(rs->state == rst.u.runstate.state, "Runstate mismatch");
 526                 TEST_ASSERT(rs->state_entry_time == rst.u.runstate.state_entry_time,
 527                             "State entry time mismatch");
 528                 TEST_ASSERT(rs->time[RUNSTATE_running] == rst.u.runstate.time_running,
 529                             "Running time mismatch");
 530                 TEST_ASSERT(rs->time[RUNSTATE_runnable] == rst.u.runstate.time_runnable,
 531                             "Runnable time mismatch");
 532                 TEST_ASSERT(rs->time[RUNSTATE_blocked] == rst.u.runstate.time_blocked,
 533                             "Blocked time mismatch");
 534                 TEST_ASSERT(rs->time[RUNSTATE_offline] == rst.u.runstate.time_offline,
 535                             "Offline time mismatch");
 536
 537                 TEST_ASSERT(rs->state_entry_time == rs->time[0] +
 538                             rs->time[1] + rs->time[2] + rs->time[3],
 539                             "runstate times don't add up");
 540         }
 541         kvm_vm_free(vm);
 542         return 0;
 543 }