// SPDX-License-Identifier: GPL-2.0-only /* * svm_vmcall_test * * Copyright © 2021 Amazon.com, Inc. or its affiliates. * * Xen shared_info / pvclock testing */ #include "test_util.h" #include "kvm_util.h" #include "processor.h" #include #include #include #include #include #define VCPU_ID 5 #define SHINFO_REGION_GVA 0xc0000000ULL #define SHINFO_REGION_GPA 0xc0000000ULL #define SHINFO_REGION_SLOT 10 #define DUMMY_REGION_GPA (SHINFO_REGION_GPA + (2 * PAGE_SIZE)) #define DUMMY_REGION_SLOT 11 #define SHINFO_ADDR (SHINFO_REGION_GPA) #define PVTIME_ADDR (SHINFO_REGION_GPA + PAGE_SIZE) #define RUNSTATE_ADDR (SHINFO_REGION_GPA + PAGE_SIZE + 0x20) #define VCPU_INFO_ADDR (SHINFO_REGION_GPA + 0x40) #define SHINFO_VADDR (SHINFO_REGION_GVA) #define RUNSTATE_VADDR (SHINFO_REGION_GVA + PAGE_SIZE + 0x20) #define VCPU_INFO_VADDR (SHINFO_REGION_GVA + 0x40) #define EVTCHN_VECTOR 0x10 #define EVTCHN_TEST1 15 #define EVTCHN_TEST2 66 #define EVTCHN_TIMER 13 static struct kvm_vm *vm; #define XEN_HYPERCALL_MSR 0x40000000 #define MIN_STEAL_TIME 50000 #define __HYPERVISOR_set_timer_op 15 #define __HYPERVISOR_sched_op 29 #define __HYPERVISOR_event_channel_op 32 #define SCHEDOP_poll 3 #define EVTCHNOP_send 4 #define EVTCHNSTAT_interdomain 2 struct evtchn_send { u32 port; }; struct sched_poll { u32 *ports; unsigned int nr_ports; u64 timeout; }; struct pvclock_vcpu_time_info { u32 version; u32 pad0; u64 tsc_timestamp; u64 system_time; u32 tsc_to_system_mul; s8 tsc_shift; u8 flags; u8 pad[2]; } __attribute__((__packed__)); /* 32 bytes */ struct pvclock_wall_clock { u32 version; u32 sec; u32 nsec; } __attribute__((__packed__)); struct vcpu_runstate_info { uint32_t state; uint64_t state_entry_time; uint64_t time[4]; }; struct arch_vcpu_info { unsigned long cr2; unsigned long pad; /* sizeof(vcpu_info_t) == 64 */ }; struct vcpu_info { uint8_t evtchn_upcall_pending; uint8_t evtchn_upcall_mask; unsigned long evtchn_pending_sel; struct arch_vcpu_info arch; struct pvclock_vcpu_time_info time; }; /* 64 bytes (x86) */ struct shared_info { struct vcpu_info vcpu_info[32]; unsigned long evtchn_pending[64]; unsigned long evtchn_mask[64]; struct pvclock_wall_clock wc; uint32_t wc_sec_hi; /* arch_shared_info here */ }; #define RUNSTATE_running 0 #define RUNSTATE_runnable 1 #define RUNSTATE_blocked 2 #define RUNSTATE_offline 3 static const char *runstate_names[] = { "running", "runnable", "blocked", "offline" }; struct { struct kvm_irq_routing info; struct kvm_irq_routing_entry entries[2]; } irq_routes; bool guest_saw_irq; static void evtchn_handler(struct ex_regs *regs) { struct vcpu_info *vi = (void *)VCPU_INFO_VADDR; vi->evtchn_upcall_pending = 0; vi->evtchn_pending_sel = 0; guest_saw_irq = true; GUEST_SYNC(0x20); } static void guest_wait_for_irq(void) { while (!guest_saw_irq) __asm__ __volatile__ ("rep nop" : : : "memory"); guest_saw_irq = false; } static void guest_code(void) { struct vcpu_runstate_info *rs = (void *)RUNSTATE_VADDR; __asm__ __volatile__( "sti\n" "nop\n" ); /* Trigger an interrupt injection */ GUEST_SYNC(0); guest_wait_for_irq(); /* Test having the host set runstates manually */ GUEST_SYNC(RUNSTATE_runnable); GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0); GUEST_ASSERT(rs->state == 0); GUEST_SYNC(RUNSTATE_blocked); GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0); GUEST_ASSERT(rs->state == 0); GUEST_SYNC(RUNSTATE_offline); GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0); GUEST_ASSERT(rs->state == 0); /* Test runstate time adjust */ GUEST_SYNC(4); GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a); GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b); /* Test runstate time set */ GUEST_SYNC(5); GUEST_ASSERT(rs->state_entry_time >= 0x8000); GUEST_ASSERT(rs->time[RUNSTATE_runnable] == 0); GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x6b6b); GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x5a); /* sched_yield() should result in some 'runnable' time */ GUEST_SYNC(6); GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME); /* Attempt to deliver a *masked* interrupt */ GUEST_SYNC(7); /* Wait until we see the bit set */ struct shared_info *si = (void *)SHINFO_VADDR; while (!si->evtchn_pending[0]) __asm__ __volatile__ ("rep nop" : : : "memory"); /* Now deliver an *unmasked* interrupt */ GUEST_SYNC(8); guest_wait_for_irq(); /* Change memslots and deliver an interrupt */ GUEST_SYNC(9); guest_wait_for_irq(); /* Deliver event channel with KVM_XEN_HVM_EVTCHN_SEND */ GUEST_SYNC(10); guest_wait_for_irq(); GUEST_SYNC(11); /* Our turn. Deliver event channel (to ourselves) with * EVTCHNOP_send hypercall. */ unsigned long rax; struct evtchn_send s = { .port = 127 }; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_event_channel_op), "D" (EVTCHNOP_send), "S" (&s)); GUEST_ASSERT(rax == 0); guest_wait_for_irq(); GUEST_SYNC(12); /* Deliver "outbound" event channel to an eventfd which * happens to be one of our own irqfds. */ s.port = 197; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_event_channel_op), "D" (EVTCHNOP_send), "S" (&s)); GUEST_ASSERT(rax == 0); guest_wait_for_irq(); GUEST_SYNC(13); /* Set a timer 100ms in the future. */ __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_set_timer_op), "D" (rs->state_entry_time + 100000000)); GUEST_ASSERT(rax == 0); GUEST_SYNC(14); /* Now wait for the timer */ guest_wait_for_irq(); GUEST_SYNC(15); /* The host has 'restored' the timer. Just wait for it. */ guest_wait_for_irq(); GUEST_SYNC(16); /* Poll for an event channel port which is already set */ u32 ports[1] = { EVTCHN_TIMER }; struct sched_poll p = { .ports = ports, .nr_ports = 1, .timeout = 0, }; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_sched_op), "D" (SCHEDOP_poll), "S" (&p)); GUEST_ASSERT(rax == 0); GUEST_SYNC(17); /* Poll for an unset port and wait for the timeout. */ p.timeout = 100000000; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_sched_op), "D" (SCHEDOP_poll), "S" (&p)); GUEST_ASSERT(rax == 0); GUEST_SYNC(18); /* A timer will wake the masked port we're waiting on, while we poll */ p.timeout = 0; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_sched_op), "D" (SCHEDOP_poll), "S" (&p)); GUEST_ASSERT(rax == 0); GUEST_SYNC(19); /* A timer wake an *unmasked* port which should wake us with an * actual interrupt, while we're polling on a different port. */ ports[0]++; p.timeout = 0; __asm__ __volatile__ ("vmcall" : "=a" (rax) : "a" (__HYPERVISOR_sched_op), "D" (SCHEDOP_poll), "S" (&p)); GUEST_ASSERT(rax == 0); guest_wait_for_irq(); GUEST_SYNC(20); /* Timer should have fired already */ guest_wait_for_irq(); GUEST_SYNC(21); } static int cmp_timespec(struct timespec *a, struct timespec *b) { if (a->tv_sec > b->tv_sec) return 1; else if (a->tv_sec < b->tv_sec) return -1; else if (a->tv_nsec > b->tv_nsec) return 1; else if (a->tv_nsec < b->tv_nsec) return -1; else return 0; } struct vcpu_info *vinfo; static void handle_alrm(int sig) { if (vinfo) printf("evtchn_upcall_pending 0x%x\n", vinfo->evtchn_upcall_pending); vcpu_dump(stdout, vm, VCPU_ID, 0); TEST_FAIL("IRQ delivery timed out"); } int main(int argc, char *argv[]) { struct timespec min_ts, max_ts, vm_ts; bool verbose; verbose = argc > 1 && (!strncmp(argv[1], "-v", 3) || !strncmp(argv[1], "--verbose", 10)); int xen_caps = kvm_check_cap(KVM_CAP_XEN_HVM); if (!(xen_caps & KVM_XEN_HVM_CONFIG_SHARED_INFO) ) { print_skip("KVM_XEN_HVM_CONFIG_SHARED_INFO not available"); exit(KSFT_SKIP); } bool do_runstate_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE); bool do_eventfd_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_EVTCHN_2LEVEL); bool do_evtchn_tests = do_eventfd_tests && !!(xen_caps & KVM_XEN_HVM_CONFIG_EVTCHN_SEND); clock_gettime(CLOCK_REALTIME, &min_ts); vm = vm_create_default(VCPU_ID, 0, (void *) guest_code); vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid()); /* Map a region for the shared_info page */ vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, SHINFO_REGION_GPA, SHINFO_REGION_SLOT, 2, 0); virt_map(vm, SHINFO_REGION_GVA, SHINFO_REGION_GPA, 2); struct shared_info *shinfo = addr_gpa2hva(vm, SHINFO_VADDR); int zero_fd = open("/dev/zero", O_RDONLY); TEST_ASSERT(zero_fd != -1, "Failed to open /dev/zero"); struct kvm_xen_hvm_config hvmc = { .flags = KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL, .msr = XEN_HYPERCALL_MSR, }; /* Let the kernel know that we *will* use it for sending all * event channels, which lets it intercept SCHEDOP_poll */ if (do_evtchn_tests) hvmc.flags |= KVM_XEN_HVM_CONFIG_EVTCHN_SEND; vm_ioctl(vm, KVM_XEN_HVM_CONFIG, &hvmc); struct kvm_xen_hvm_attr lm = { .type = KVM_XEN_ATTR_TYPE_LONG_MODE, .u.long_mode = 1, }; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &lm); struct kvm_xen_hvm_attr ha = { .type = KVM_XEN_ATTR_TYPE_SHARED_INFO, .u.shared_info.gfn = SHINFO_REGION_GPA / PAGE_SIZE, }; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &ha); /* * Test what happens when the HVA of the shinfo page is remapped after * the kernel has a reference to it. But make sure we copy the clock * info over since that's only set at setup time, and we test it later. */ struct pvclock_wall_clock wc_copy = shinfo->wc; void *m = mmap(shinfo, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED|MAP_PRIVATE, zero_fd, 0); TEST_ASSERT(m == shinfo, "Failed to map /dev/zero over shared info"); shinfo->wc = wc_copy; struct kvm_xen_vcpu_attr vi = { .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO, .u.gpa = VCPU_INFO_ADDR, }; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &vi); struct kvm_xen_vcpu_attr pvclock = { .type = KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO, .u.gpa = PVTIME_ADDR, }; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &pvclock); struct kvm_xen_hvm_attr vec = { .type = KVM_XEN_ATTR_TYPE_UPCALL_VECTOR, .u.vector = EVTCHN_VECTOR, }; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &vec); vm_init_descriptor_tables(vm); vcpu_init_descriptor_tables(vm, VCPU_ID); vm_install_exception_handler(vm, EVTCHN_VECTOR, evtchn_handler); if (do_runstate_tests) { struct kvm_xen_vcpu_attr st = { .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR, .u.gpa = RUNSTATE_ADDR, }; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &st); } int irq_fd[2] = { -1, -1 }; if (do_eventfd_tests) { irq_fd[0] = eventfd(0, 0); irq_fd[1] = eventfd(0, 0); /* Unexpected, but not a KVM failure */ if (irq_fd[0] == -1 || irq_fd[1] == -1) do_evtchn_tests = do_eventfd_tests = false; } if (do_eventfd_tests) { irq_routes.info.nr = 2; irq_routes.entries[0].gsi = 32; irq_routes.entries[0].type = KVM_IRQ_ROUTING_XEN_EVTCHN; irq_routes.entries[0].u.xen_evtchn.port = EVTCHN_TEST1; irq_routes.entries[0].u.xen_evtchn.vcpu = VCPU_ID; irq_routes.entries[0].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL; irq_routes.entries[1].gsi = 33; irq_routes.entries[1].type = KVM_IRQ_ROUTING_XEN_EVTCHN; irq_routes.entries[1].u.xen_evtchn.port = EVTCHN_TEST2; irq_routes.entries[1].u.xen_evtchn.vcpu = VCPU_ID; irq_routes.entries[1].u.xen_evtchn.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL; vm_ioctl(vm, KVM_SET_GSI_ROUTING, &irq_routes); struct kvm_irqfd ifd = { }; ifd.fd = irq_fd[0]; ifd.gsi = 32; vm_ioctl(vm, KVM_IRQFD, &ifd); ifd.fd = irq_fd[1]; ifd.gsi = 33; vm_ioctl(vm, KVM_IRQFD, &ifd); struct sigaction sa = { }; sa.sa_handler = handle_alrm; sigaction(SIGALRM, &sa, NULL); } struct kvm_xen_vcpu_attr tmr = { .type = KVM_XEN_VCPU_ATTR_TYPE_TIMER, .u.timer.port = EVTCHN_TIMER, .u.timer.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL, .u.timer.expires_ns = 0 }; if (do_evtchn_tests) { struct kvm_xen_hvm_attr inj = { .type = KVM_XEN_ATTR_TYPE_EVTCHN, .u.evtchn.send_port = 127, .u.evtchn.type = EVTCHNSTAT_interdomain, .u.evtchn.flags = 0, .u.evtchn.deliver.port.port = EVTCHN_TEST1, .u.evtchn.deliver.port.vcpu = VCPU_ID + 1, .u.evtchn.deliver.port.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL, }; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &inj); /* Test migration to a different vCPU */ inj.u.evtchn.flags = KVM_XEN_EVTCHN_UPDATE; inj.u.evtchn.deliver.port.vcpu = VCPU_ID; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &inj); inj.u.evtchn.send_port = 197; inj.u.evtchn.deliver.eventfd.port = 0; inj.u.evtchn.deliver.eventfd.fd = irq_fd[1]; inj.u.evtchn.flags = 0; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &inj); vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &tmr); } vinfo = addr_gpa2hva(vm, VCPU_INFO_VADDR); vinfo->evtchn_upcall_pending = 0; struct vcpu_runstate_info *rs = addr_gpa2hva(vm, RUNSTATE_ADDR); rs->state = 0x5a; bool evtchn_irq_expected = false; for (;;) { volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID); struct ucall uc; vcpu_run(vm, VCPU_ID); TEST_ASSERT(run->exit_reason == KVM_EXIT_IO, "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n", run->exit_reason, exit_reason_str(run->exit_reason)); switch (get_ucall(vm, VCPU_ID, &uc)) { case UCALL_ABORT: TEST_FAIL("%s", (const char *)uc.args[0]); /* NOT REACHED */ case UCALL_SYNC: { struct kvm_xen_vcpu_attr rst; long rundelay; if (do_runstate_tests) TEST_ASSERT(rs->state_entry_time == rs->time[0] + rs->time[1] + rs->time[2] + rs->time[3], "runstate times don't add up"); switch (uc.args[1]) { case 0: if (verbose) printf("Delivering evtchn upcall\n"); evtchn_irq_expected = true; vinfo->evtchn_upcall_pending = 1; break; case RUNSTATE_runnable...RUNSTATE_offline: TEST_ASSERT(!evtchn_irq_expected, "Event channel IRQ not seen"); if (!do_runstate_tests) goto done; if (verbose) printf("Testing runstate %s\n", runstate_names[uc.args[1]]); rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT; rst.u.runstate.state = uc.args[1]; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst); break; case 4: if (verbose) printf("Testing RUNSTATE_ADJUST\n"); rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST; memset(&rst.u, 0, sizeof(rst.u)); rst.u.runstate.state = (uint64_t)-1; rst.u.runstate.time_blocked = 0x5a - rs->time[RUNSTATE_blocked]; rst.u.runstate.time_offline = 0x6b6b - rs->time[RUNSTATE_offline]; rst.u.runstate.time_runnable = -rst.u.runstate.time_blocked - rst.u.runstate.time_offline; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst); break; case 5: if (verbose) printf("Testing RUNSTATE_DATA\n"); rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA; memset(&rst.u, 0, sizeof(rst.u)); rst.u.runstate.state = RUNSTATE_running; rst.u.runstate.state_entry_time = 0x6b6b + 0x5a; rst.u.runstate.time_blocked = 0x6b6b; rst.u.runstate.time_offline = 0x5a; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst); break; case 6: if (verbose) printf("Testing steal time\n"); /* Yield until scheduler delay exceeds target */ rundelay = get_run_delay() + MIN_STEAL_TIME; do { sched_yield(); } while (get_run_delay() < rundelay); break; case 7: if (!do_eventfd_tests) goto done; if (verbose) printf("Testing masked event channel\n"); shinfo->evtchn_mask[0] = 1UL << EVTCHN_TEST1; eventfd_write(irq_fd[0], 1UL); alarm(1); break; case 8: if (verbose) printf("Testing unmasked event channel\n"); /* Unmask that, but deliver the other one */ shinfo->evtchn_pending[0] = 0; shinfo->evtchn_mask[0] = 0; eventfd_write(irq_fd[1], 1UL); evtchn_irq_expected = true; alarm(1); break; case 9: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); shinfo->evtchn_pending[1] = 0; if (verbose) printf("Testing event channel after memslot change\n"); vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, DUMMY_REGION_GPA, DUMMY_REGION_SLOT, 1, 0); eventfd_write(irq_fd[0], 1UL); evtchn_irq_expected = true; alarm(1); break; case 10: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); if (!do_evtchn_tests) goto done; shinfo->evtchn_pending[0] = 0; if (verbose) printf("Testing injection with KVM_XEN_HVM_EVTCHN_SEND\n"); struct kvm_irq_routing_xen_evtchn e; e.port = EVTCHN_TEST2; e.vcpu = VCPU_ID; e.priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL; vm_ioctl(vm, KVM_XEN_HVM_EVTCHN_SEND, &e); evtchn_irq_expected = true; alarm(1); break; case 11: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); shinfo->evtchn_pending[1] = 0; if (verbose) printf("Testing guest EVTCHNOP_send direct to evtchn\n"); evtchn_irq_expected = true; alarm(1); break; case 12: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); shinfo->evtchn_pending[0] = 0; if (verbose) printf("Testing guest EVTCHNOP_send to eventfd\n"); evtchn_irq_expected = true; alarm(1); break; case 13: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); shinfo->evtchn_pending[1] = 0; if (verbose) printf("Testing guest oneshot timer\n"); break; case 14: memset(&tmr, 0, sizeof(tmr)); tmr.type = KVM_XEN_VCPU_ATTR_TYPE_TIMER; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &tmr); TEST_ASSERT(tmr.u.timer.port == EVTCHN_TIMER, "Timer port not returned"); TEST_ASSERT(tmr.u.timer.priority == KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL, "Timer priority not returned"); TEST_ASSERT(tmr.u.timer.expires_ns > rs->state_entry_time, "Timer expiry not returned"); evtchn_irq_expected = true; alarm(1); break; case 15: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); shinfo->evtchn_pending[0] = 0; if (verbose) printf("Testing restored oneshot timer\n"); tmr.u.timer.expires_ns = rs->state_entry_time + 100000000, vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &tmr); evtchn_irq_expected = true; alarm(1); break; case 16: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); if (verbose) printf("Testing SCHEDOP_poll with already pending event\n"); shinfo->evtchn_pending[0] = shinfo->evtchn_mask[0] = 1UL << EVTCHN_TIMER; alarm(1); break; case 17: if (verbose) printf("Testing SCHEDOP_poll timeout\n"); shinfo->evtchn_pending[0] = 0; alarm(1); break; case 18: if (verbose) printf("Testing SCHEDOP_poll wake on masked event\n"); tmr.u.timer.expires_ns = rs->state_entry_time + 100000000, vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &tmr); alarm(1); break; case 19: shinfo->evtchn_pending[0] = shinfo->evtchn_mask[0] = 0; if (verbose) printf("Testing SCHEDOP_poll wake on unmasked event\n"); evtchn_irq_expected = true; tmr.u.timer.expires_ns = rs->state_entry_time + 100000000; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &tmr); /* Read it back and check the pending time is reported correctly */ tmr.u.timer.expires_ns = 0; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &tmr); TEST_ASSERT(tmr.u.timer.expires_ns == rs->state_entry_time + 100000000, "Timer not reported pending"); alarm(1); break; case 20: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); /* Read timer and check it is no longer pending */ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &tmr); TEST_ASSERT(!tmr.u.timer.expires_ns, "Timer still reported pending"); shinfo->evtchn_pending[0] = 0; if (verbose) printf("Testing timer in the past\n"); evtchn_irq_expected = true; tmr.u.timer.expires_ns = rs->state_entry_time - 100000000ULL; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &tmr); alarm(1); break; case 21: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); goto done; case 0x20: TEST_ASSERT(evtchn_irq_expected, "Unexpected event channel IRQ"); evtchn_irq_expected = false; break; } break; } case UCALL_DONE: goto done; default: TEST_FAIL("Unknown ucall 0x%lx.", uc.cmd); } } done: alarm(0); clock_gettime(CLOCK_REALTIME, &max_ts); /* * Just a *really* basic check that things are being put in the * right place. The actual calculations are much the same for * Xen as they are for the KVM variants, so no need to check. */ struct pvclock_wall_clock *wc; struct pvclock_vcpu_time_info *ti, *ti2; wc = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0xc00); ti = addr_gpa2hva(vm, SHINFO_REGION_GPA + 0x40 + 0x20); ti2 = addr_gpa2hva(vm, PVTIME_ADDR); if (verbose) { printf("Wall clock (v %d) %d.%09d\n", wc->version, wc->sec, wc->nsec); printf("Time info 1: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n", ti->version, ti->tsc_timestamp, ti->system_time, ti->tsc_to_system_mul, ti->tsc_shift, ti->flags); printf("Time info 2: v %u tsc %" PRIu64 " time %" PRIu64 " mul %u shift %u flags %x\n", ti2->version, ti2->tsc_timestamp, ti2->system_time, ti2->tsc_to_system_mul, ti2->tsc_shift, ti2->flags); } vm_ts.tv_sec = wc->sec; vm_ts.tv_nsec = wc->nsec; TEST_ASSERT(wc->version && !(wc->version & 1), "Bad wallclock version %x", wc->version); TEST_ASSERT(cmp_timespec(&min_ts, &vm_ts) <= 0, "VM time too old"); TEST_ASSERT(cmp_timespec(&max_ts, &vm_ts) >= 0, "VM time too new"); TEST_ASSERT(ti->version && !(ti->version & 1), "Bad time_info version %x", ti->version); TEST_ASSERT(ti2->version && !(ti2->version & 1), "Bad time_info version %x", ti->version); if (do_runstate_tests) { /* * Fetch runstate and check sanity. Strictly speaking in the * general case we might not expect the numbers to be identical * but in this case we know we aren't running the vCPU any more. */ struct kvm_xen_vcpu_attr rst = { .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA, }; vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &rst); if (verbose) { printf("Runstate: %s(%d), entry %" PRIu64 " ns\n", rs->state <= RUNSTATE_offline ? runstate_names[rs->state] : "unknown", rs->state, rs->state_entry_time); for (int i = RUNSTATE_running; i <= RUNSTATE_offline; i++) { printf("State %s: %" PRIu64 " ns\n", runstate_names[i], rs->time[i]); } } TEST_ASSERT(rs->state == rst.u.runstate.state, "Runstate mismatch"); TEST_ASSERT(rs->state_entry_time == rst.u.runstate.state_entry_time, "State entry time mismatch"); TEST_ASSERT(rs->time[RUNSTATE_running] == rst.u.runstate.time_running, "Running time mismatch"); TEST_ASSERT(rs->time[RUNSTATE_runnable] == rst.u.runstate.time_runnable, "Runnable time mismatch"); TEST_ASSERT(rs->time[RUNSTATE_blocked] == rst.u.runstate.time_blocked, "Blocked time mismatch"); TEST_ASSERT(rs->time[RUNSTATE_offline] == rst.u.runstate.time_offline, "Offline time mismatch"); TEST_ASSERT(rs->state_entry_time == rs->time[0] + rs->time[1] + rs->time[2] + rs->time[3], "runstate times don't add up"); } kvm_vm_free(vm); return 0; }