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 #define PAGE_SIZE               4096
  27
  28 #define DUMMY_REGION_GPA        (SHINFO_REGION_GPA + (2 * PAGE_SIZE))
  29 #define DUMMY_REGION_SLOT       11
  30
  31 #define SHINFO_ADDR     (SHINFO_REGION_GPA)
  32 #define PVTIME_ADDR     (SHINFO_REGION_GPA + PAGE_SIZE)
  33 #define RUNSTATE_ADDR   (SHINFO_REGION_GPA + PAGE_SIZE + 0x20)
  34 #define VCPU_INFO_ADDR  (SHINFO_REGION_GPA + 0x40)
  35
  36 #define SHINFO_VADDR    (SHINFO_REGION_GVA)
  37 #define RUNSTATE_VADDR  (SHINFO_REGION_GVA + PAGE_SIZE + 0x20)
  38 #define VCPU_INFO_VADDR (SHINFO_REGION_GVA + 0x40)
  39
  40 #define EVTCHN_VECTOR   0x10
  41
  42 static struct kvm_vm *vm;
  43
  44 #define XEN_HYPERCALL_MSR       0x40000000
  45
  46 #define MIN_STEAL_TIME          50000
  47
  48 struct pvclock_vcpu_time_info {
  49         u32   version;
  50         u32   pad0;
  51         u64   tsc_timestamp;
  52         u64   system_time;
  53         u32   tsc_to_system_mul;
  54         s8    tsc_shift;
  55         u8    flags;
  56         u8    pad[2];
  57 } __attribute__((__packed__)); /* 32 bytes */
  58
  59 struct pvclock_wall_clock {
  60         u32   version;
  61         u32   sec;
  62         u32   nsec;
  63 } __attribute__((__packed__));
  64
  65 struct vcpu_runstate_info {
  66     uint32_t state;
  67     uint64_t state_entry_time;
  68     uint64_t time[4];
  69 };
  70
  71 struct arch_vcpu_info {
  72     unsigned long cr2;
  73     unsigned long pad; /* sizeof(vcpu_info_t) == 64 */
  74 };
  75
  76 struct vcpu_info {
  77         uint8_t evtchn_upcall_pending;
  78         uint8_t evtchn_upcall_mask;
  79         unsigned long evtchn_pending_sel;
  80         struct arch_vcpu_info arch;
  81         struct pvclock_vcpu_time_info time;
  82 }; /* 64 bytes (x86) */
  83
  84 struct shared_info {
  85         struct vcpu_info vcpu_info[32];
  86         unsigned long evtchn_pending[64];
  87         unsigned long evtchn_mask[64];
  88         struct pvclock_wall_clock wc;
  89         uint32_t wc_sec_hi;
  90         /* arch_shared_info here */
  91 };
  92
  93 #define RUNSTATE_running  0
  94 #define RUNSTATE_runnable 1
  95 #define RUNSTATE_blocked  2
  96 #define RUNSTATE_offline  3
  97
  98 static const char *runstate_names[] = {
  99         "running",
 100         "runnable",
 101         "blocked",
 102         "offline"
 103 };
 104
 105 struct {
 106         struct kvm_irq_routing info;
 107         struct kvm_irq_routing_entry entries[2];
 108 } irq_routes;
 109
 110 static void evtchn_handler(struct ex_regs *regs)
 111 {
 112         struct vcpu_info *vi = (void *)VCPU_INFO_VADDR;
 113         vi->evtchn_upcall_pending = 0;
 114         vi->evtchn_pending_sel = 0;
 115
 116         GUEST_SYNC(0x20);
 117 }
 118
 119 static void guest_code(void)
 120 {
 121         struct vcpu_runstate_info *rs = (void *)RUNSTATE_VADDR;
 122
 123         __asm__ __volatile__(
 124                 "sti\n"
 125                 "nop\n"
 126         );
 127
 128         /* Trigger an interrupt injection */
 129         GUEST_SYNC(0);
 130
 131         /* Test having the host set runstates manually */
 132         GUEST_SYNC(RUNSTATE_runnable);
 133         GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0);
 134         GUEST_ASSERT(rs->state == 0);
 135
 136         GUEST_SYNC(RUNSTATE_blocked);
 137         GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0);
 138         GUEST_ASSERT(rs->state == 0);
 139
 140         GUEST_SYNC(RUNSTATE_offline);
 141         GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0);
 142         GUEST_ASSERT(rs->state == 0);
 143
 144         /* Test runstate time adjust */
 145         GUEST_SYNC(4);
 146         GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a);
 147         GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b);
 148
 149         /* Test runstate time set */
 150         GUEST_SYNC(5);
 151         GUEST_ASSERT(rs->state_entry_time >= 0x8000);
 152         GUEST_ASSERT(rs->time[RUNSTATE_runnable] == 0);
 153         GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x6b6b);
 154         GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x5a);
 155
 156         /* sched_yield() should result in some 'runnable' time */
 157         GUEST_SYNC(6);
 158         GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME);
 159
 160         /* Attempt to deliver a *masked* interrupt */
 161         GUEST_SYNC(7);
 162
 163         /* Wait until we see the bit set */
 164         struct shared_info *si = (void *)SHINFO_VADDR;
 165         while (!si->evtchn_pending[0])
 166                 __asm__ __volatile__ ("rep nop" : : : "memory");
 167
 168         /* Now deliver an *unmasked* interrupt */
 169         GUEST_SYNC(8);
 170
 171         while (!si->evtchn_pending[1])
 172                 __asm__ __volatile__ ("rep nop" : : : "memory");
 173
 174         /* Change memslots and deliver an interrupt */
 175         GUEST_SYNC(9);
 176
 177         for (;;)
 178                 __asm__ __volatile__ ("rep nop" : : : "memory");
 179 }
 180
 181 static int cmp_timespec(struct timespec *a, struct timespec *b)
 182 {
 183         if (a->tv_sec > b->tv_sec)
 184                 return 1;
 185         else if (a->tv_sec < b->tv_sec)
 186                 return -1;
 187         else if (a->tv_nsec > b->tv_nsec)
 188                 return 1;
 189         else if (a->tv_nsec < b->tv_nsec)
 190                 return -1;
 191         else
 192                 return 0;
 193 }
 194
 195 static void handle_alrm(int sig)
 196 {
 197         TEST_FAIL("IRQ delivery timed out");
 198 }
 199
 200 int main(int argc, char *argv[])
 201 {
 202         struct timespec min_ts, max_ts, vm_ts;
 203         bool verbose;
 204
 205         verbose = argc > 1 && (!strncmp(argv[1], "-v", 3) ||
 206                                !strncmp(argv[1], "--verbose", 10));
 207
 208         int xen_caps = kvm_check_cap(KVM_CAP_XEN_HVM);
 209         if (!(xen_caps & KVM_XEN_HVM_CONFIG_SHARED_INFO) ) {
 210                 print_skip("KVM_XEN_HVM_CONFIG_SHARED_INFO not available");
 211                 exit(KSFT_SKIP);
 212         }
 213
 214         bool do_runstate_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE);
 215         bool do_eventfd_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_EVTCHN_2LEVEL);
 216
 217         clock_gettime(CLOCK_REALTIME, &min_ts);
 218
 219         vm = vm_create_default(VCPU_ID, 0, (void *) guest_code);
 220         vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 221
 222         /* Map a region for the shared_info page */
 223         vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
 224                                     SHINFO_REGION_GPA, SHINFO_REGION_SLOT, 2, 0);
 225         virt_map(vm, SHINFO_REGION_GVA, SHINFO_REGION_GPA, 2);
 226
 227         struct shared_info *shinfo = addr_gpa2hva(vm, SHINFO_VADDR);
 228
 229         int zero_fd = open("/dev/zero", O_RDONLY);
 230         TEST_ASSERT(zero_fd != -1, "Failed to open /dev/zero");
 231
 232         struct kvm_xen_hvm_config hvmc = {
 233                 .flags = KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL,
 234                 .msr = XEN_HYPERCALL_MSR,
 235         };
 236         vm_ioctl(vm, KVM_XEN_HVM_CONFIG, &hvmc);
 237
 238         struct kvm_xen_hvm_attr lm = {
 239                 .type = KVM_XEN_ATTR_TYPE_LONG_MODE,
 240                 .u.long_mode = 1,
 241         };
 242         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &lm);
 243
 244         struct kvm_xen_hvm_attr ha = {
 245                 .type = KVM_XEN_ATTR_TYPE_SHARED_INFO,
 246                 .u.shared_info.gfn = SHINFO_REGION_GPA / PAGE_SIZE,
 247         };
 248         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &ha);
 249
 250         /*
 251          * Test what happens when the HVA of the shinfo page is remapped after
 252          * the kernel has a reference to it. But make sure we copy the clock
 253          * info over since that's only set at setup time, and we test it later.
 254          */
 255         struct pvclock_wall_clock wc_copy = shinfo->wc;
 256         void *m = mmap(shinfo, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED|MAP_PRIVATE, zero_fd, 0);
 257         TEST_ASSERT(m == shinfo, "Failed to map /dev/zero over shared info");
 258         shinfo->wc = wc_copy;
 259
 260         struct kvm_xen_vcpu_attr vi = {
 261                 .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO,
 262                 .u.gpa = VCPU_INFO_ADDR,
 263         };
 264         vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &vi);
 265
 266         struct kvm_xen_vcpu_attr pvclock = {
 267                 .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO,
 268                 .u.gpa = PVTIME_ADDR,
 269         };
 270         vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &pvclock);
 271
 272         struct kvm_xen_hvm_attr vec = {
 273                 .type = KVM_XEN_ATTR_TYPE_UPCALL_VECTOR,
 274                 .u.vector = EVTCHN_VECTOR,
 275         };
 276         vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &vec);
 277
 278         vm_init_descriptor_tables(vm);
 279         vcpu_init_descriptor_tables(vm, VCPU_ID);
 280         vm_install_exception_handler(vm, EVTCHN_VECTOR, evtchn_handler);
 281
 282         if (do_runstate_tests) {
 283                 struct kvm_xen_vcpu_attr st = {
 284                         .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
 285                         .u.gpa = RUNSTATE_ADDR,
 286                 };
 287                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &st);
 288         }
 289
 290         int irq_fd[2] = { -1, -1 };
 291
 292         if (do_eventfd_tests) {
 293                 irq_fd[0] = eventfd(0, 0);
 294                 irq_fd[1] = eventfd(0, 0);
 295
 296                 /* Unexpected, but not a KVM failure */
 297                 if (irq_fd[0] == -1 || irq_fd[1] == -1)
 298                         do_eventfd_tests = false;
 299         }
 300
 301         if (do_eventfd_tests) {
 302                 irq_routes.info.nr = 2;
 303
 304                 irq_routes.entries[0].gsi = 32;
 305                 irq_routes.entries[0].type = KVM_IRQ_ROUTING_XEN_EVTCHN;
 306                 irq_routes.entries[0].u.xen_evtchn.port = 15;
 307                 irq_routes.entries[0].u.xen_evtchn.vcpu = VCPU_ID;
 308                 irq_routes.entries[0].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL;
 309
 310                 irq_routes.entries[1].gsi = 33;
 311                 irq_routes.entries[1].type = KVM_IRQ_ROUTING_XEN_EVTCHN;
 312                 irq_routes.entries[1].u.xen_evtchn.port = 66;
 313                 irq_routes.entries[1].u.xen_evtchn.vcpu = VCPU_ID;
 314                 irq_routes.entries[1].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL;
 315
 316                 vm_ioctl(vm, KVM_SET_GSI_ROUTING, &irq_routes);
 317
 318                 struct kvm_irqfd ifd = { };
 319
 320                 ifd.fd = irq_fd[0];
 321                 ifd.gsi = 32;
 322                 vm_ioctl(vm, KVM_IRQFD, &ifd);
 323
 324                 ifd.fd = irq_fd[1];
 325                 ifd.gsi = 33;
 326                 vm_ioctl(vm, KVM_IRQFD, &ifd);
 327
 328                 struct sigaction sa = { };
 329                 sa.sa_handler = handle_alrm;
 330                 sigaction(SIGALRM, &sa, NULL);
 331         }
 332
 333         struct vcpu_info *vinfo = addr_gpa2hva(vm, VCPU_INFO_VADDR);
 334         vinfo->evtchn_upcall_pending = 0;
 335
 336         struct vcpu_runstate_info *rs = addr_gpa2hva(vm, RUNSTATE_ADDR);
 337         rs->state = 0x5a;
 338
 339         bool evtchn_irq_expected = false;
 340
 341         for (;;) {
 342                 volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
 343                 struct ucall uc;
 344
 345                 vcpu_run(vm, VCPU_ID);
 346
 347                 TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
 348                             "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
 349                             run->exit_reason,
 350                             exit_reason_str(run->exit_reason));
 351
 352                 switch (get_ucall(vm, VCPU_ID, &uc)) {
 353                 case UCALL_ABORT:
 354                         TEST_FAIL("%s", (const char *)uc.args[0]);
 355                         /* NOT REACHED */
 356                 case UCALL_SYNC: {
 357                         struct kvm_xen_vcpu_attr rst;
 358                         long rundelay;
 359
 360                         if (do_runstate_tests)
 361                                 TEST_ASSERT(rs->state_entry_time == rs->time[0] +
 362                                             rs->time[1] + rs->time[2] + rs->time[3],
 363                                             "runstate times don't add up");
 364
 365                         switch (uc.args[1]) {
 366                         case 0:
 367                                 if (verbose)
 368                                         printf("Delivering evtchn upcall\n");
 369                                 evtchn_irq_expected = true;
 370                                 vinfo->evtchn_upcall_pending = 1;
 371                                 break;
 372
 373                         case RUNSTATE_runnable...RUNSTATE_offline:
 374                                 TEST_ASSERT(!evtchn_irq_expected, "Event channel IRQ not seen");
 375                                 if (!do_runstate_tests)
 376                                         goto done;
 377                                 if (verbose)
 378                                         printf("Testing runstate %s\n", runstate_names[uc.args[1]]);
 379                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT;
 380                                 rst.u.runstate.state = uc.args[1];
 381                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 382                                 break;
 383
 384                         case 4:
 385                                 if (verbose)
 386                                         printf("Testing RUNSTATE_ADJUST\n");
 387                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST;
 388                                 memset(&rst.u, 0, sizeof(rst.u));
 389                                 rst.u.runstate.state = (uint64_t)-1;
 390                                 rst.u.runstate.time_blocked =
 391                                         0x5a - rs->time[RUNSTATE_blocked];
 392                                 rst.u.runstate.time_offline =
 393                                         0x6b6b - rs->time[RUNSTATE_offline];
 394                                 rst.u.runstate.time_runnable = -rst.u.runstate.time_blocked -
 395                                         rst.u.runstate.time_offline;
 396                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 397                                 break;
 398
 399                         case 5:
 400                                 if (verbose)
 401                                         printf("Testing RUNSTATE_DATA\n");
 402                                 rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA;
 403                                 memset(&rst.u, 0, sizeof(rst.u));
 404                                 rst.u.runstate.state = RUNSTATE_running;
 405                                 rst.u.runstate.state_entry_time = 0x6b6b + 0x5a;
 406                                 rst.u.runstate.time_blocked = 0x6b6b;
 407                                 rst.u.runstate.time_offline = 0x5a;
 408                                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
 409                                 break;
 410
 411                         case 6:
 412                                 if (verbose)
 413                                         printf("Testing steal time\n");
 414                                 /* Yield until scheduler delay exceeds target */
 415                                 rundelay = get_run_delay() + MIN_STEAL_TIME;
 416                                 do {
 417                                         sched_yield();
 418                                 } while (get_run_delay() < rundelay);
 419                                 break;
 420
 421                         case 7:
 422                                 if (!do_eventfd_tests)
 423                                         goto done;
 424                                 if (verbose)
 425                                         printf("Testing masked event channel\n");
 426                                 shinfo->evtchn_mask[0] = 0x8000;
 427                                 eventfd_write(irq_fd[0], 1UL);
 428                                 alarm(1);
 429                                 break;
 430
 431                         case 8:
 432                                 if (verbose)
 433                                         printf("Testing unmasked event channel\n");
 434                                 /* Unmask that, but deliver the other one */
 435                                 shinfo->evtchn_pending[0] = 0;
 436                                 shinfo->evtchn_mask[0] = 0;
 437                                 eventfd_write(irq_fd[1], 1UL);
 438                                 evtchn_irq_expected = true;
 439                                 alarm(1);
 440                                 break;
 441
 442                         case 9:
 443                                 if (verbose)
 444                                         printf("Testing event channel after memslot change\n");
 445                                 vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
 446                                                             DUMMY_REGION_GPA, DUMMY_REGION_SLOT, 1, 0);
 447                                 eventfd_write(irq_fd[0], 1UL);
 448                                 evtchn_irq_expected = true;
 449                                 alarm(1);
 450                                 break;
 451
 452                         case 0x20:
 453                                 TEST_ASSERT(evtchn_irq_expected, "Unexpected event channel IRQ");
 454                                 evtchn_irq_expected = false;
 455                                 if (shinfo->evtchn_pending[1] &&
 456                                     shinfo->evtchn_pending[0])
 457                                         goto done;
 458                                 break;
 459                         }
 460                         break;
 461                 }
 462                 case UCALL_DONE:
 463                         goto done;
 464                 default:
 465                         TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd);
 466                 }
 467         }
 468
 469  done:
 470         clock_gettime(CLOCK_REALTIME, &max_ts);
 471
 472         /*
 473          * Just a *really* basic check that things are being put in the
 474          * right place. The actual calculations are much the same for
 475          * Xen as they are for the KVM variants, so no need to check.
 476          */
 477         struct pvclock_wall_clock *wc;
 478         struct pvclock_vcpu_time_info *ti, *ti2;
 479
 480         wc = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0xc00);
 481         ti = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0x40 + 0x20);
 482         ti2 = addr_gpa2hva(vm, PVTIME_ADDR);
 483
 484         if (verbose) {
 485                 printf("Wall clock (v %d) %d.%09d\n", wc->version, wc->sec, wc->nsec);
 486                 printf("Time info 1: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n",
 487                        ti->version, ti->tsc_timestamp, ti->system_time, ti->tsc_to_system_mul,
 488                        ti->tsc_shift, ti->flags);
 489                 printf("Time info 2: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n",
 490                        ti2->version, ti2->tsc_timestamp, ti2->system_time, ti2->tsc_to_system_mul,
 491                        ti2->tsc_shift, ti2->flags);
 492         }
 493
 494         vm_ts.tv_sec = wc->sec;
 495         vm_ts.tv_nsec = wc->nsec;
 496         TEST_ASSERT(wc->version && !(wc->version & 1),
 497                     "Bad wallclock version %x", wc->version);
 498         TEST_ASSERT(cmp_timespec(&min_ts, &vm_ts) <= 0, "VM time too old");
 499         TEST_ASSERT(cmp_timespec(&max_ts, &vm_ts) >= 0, "VM time too new");
 500
 501         TEST_ASSERT(ti->version && !(ti->version & 1),
 502                     "Bad time_info version %x", ti->version);
 503         TEST_ASSERT(ti2->version && !(ti2->version & 1),
 504                     "Bad time_info version %x", ti->version);
 505
 506         if (do_runstate_tests) {
 507                 /*
 508                  * Fetch runstate and check sanity. Strictly speaking in the
 509                  * general case we might not expect the numbers to be identical
 510                  * but in this case we know we aren't running the vCPU any more.
 511                  */
 512                 struct kvm_xen_vcpu_attr rst = {
 513                         .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA,
 514                 };
 515                 vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &rst);
 516
 517                 if (verbose) {
 518                         printf("Runstate: %s(%d), entry %" PRIu64 " ns\n",
 519                                rs->state <= RUNSTATE_offline ? runstate_names[rs->state] : "unknown",
 520                                rs->state, rs->state_entry_time);
 521                         for (int i = RUNSTATE_running; i <= RUNSTATE_offline; i++) {
 522                                 printf("State %s: %" PRIu64 " ns\n",
 523                                        runstate_names[i], rs->time[i]);
 524                         }
 525                 }
 526                 TEST_ASSERT(rs->state == rst.u.runstate.state, "Runstate mismatch");
 527                 TEST_ASSERT(rs->state_entry_time == rst.u.runstate.state_entry_time,
 528                             "State entry time mismatch");
 529                 TEST_ASSERT(rs->time[RUNSTATE_running] == rst.u.runstate.time_running,
 530                             "Running time mismatch");
 531                 TEST_ASSERT(rs->time[RUNSTATE_runnable] == rst.u.runstate.time_runnable,
 532                             "Runnable time mismatch");
 533                 TEST_ASSERT(rs->time[RUNSTATE_blocked] == rst.u.runstate.time_blocked,
 534                             "Blocked time mismatch");
 535                 TEST_ASSERT(rs->time[RUNSTATE_offline] == rst.u.runstate.time_offline,
 536                             "Offline time mismatch");
 537
 538                 TEST_ASSERT(rs->state_entry_time == rs->time[0] +
 539                             rs->time[1] + rs->time[2] + rs->time[3],
 540                             "runstate times don't add up");
 541         }
 542         kvm_vm_free(vm);
 543         return 0;
 544 }