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1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright © 2021 Amazon.com, Inc. or its affiliates. */ #include "test_util.h" #include "kvm_util.h" #include "processor.h" #include <stdint.h> #include <time.h> #include <sched.h> #include <signal.h> #include <pthread.h> #include <sys/eventfd.h> #define SHINFO_REGION_GVA 0xc0000000ULL #define SHINFO_REGION_GPA 0xc0000000ULL #define SHINFO_REGION_SLOT 10 #define DUMMY_REGION_GPA (SHINFO_REGION_GPA + (3 * PAGE_SIZE)) #define DUMMY_REGION_SLOT 11 #define DUMMY_REGION_GPA_2 (SHINFO_REGION_GPA + (4 * PAGE_SIZE)) #define DUMMY_REGION_SLOT_2 12 #define SHINFO_ADDR (SHINFO_REGION_GPA) #define VCPU_INFO_ADDR (SHINFO_REGION_GPA + 0x40) #define PVTIME_ADDR (SHINFO_REGION_GPA + PAGE_SIZE) #define RUNSTATE_ADDR (SHINFO_REGION_GPA + PAGE_SIZE + PAGE_SIZE - 15) #define SHINFO_VADDR (SHINFO_REGION_GVA) #define VCPU_INFO_VADDR (SHINFO_REGION_GVA + 0x40) #define RUNSTATE_VADDR (SHINFO_REGION_GVA + PAGE_SIZE + PAGE_SIZE - 15) #define EVTCHN_VECTOR 0x10 #define EVTCHN_TEST1 15 #define EVTCHN_TEST2 66 #define EVTCHN_TIMER 13 enum { TEST_INJECT_VECTOR = 0, TEST_RUNSTATE_runnable, TEST_RUNSTATE_blocked, TEST_RUNSTATE_offline, TEST_RUNSTATE_ADJUST, TEST_RUNSTATE_DATA, TEST_STEAL_TIME, TEST_EVTCHN_MASKED, TEST_EVTCHN_UNMASKED, TEST_EVTCHN_SLOWPATH, TEST_EVTCHN_SEND_IOCTL, TEST_EVTCHN_HCALL, TEST_EVTCHN_HCALL_SLOWPATH, TEST_EVTCHN_HCALL_EVENTFD, TEST_TIMER_SETUP, TEST_TIMER_WAIT, TEST_TIMER_RESTORE, TEST_POLL_READY, TEST_POLL_TIMEOUT, TEST_POLL_MASKED, TEST_POLL_WAKE, TEST_TIMER_PAST, TEST_LOCKING_SEND_RACE, TEST_LOCKING_POLL_RACE, TEST_LOCKING_POLL_TIMEOUT, TEST_DONE, TEST_GUEST_SAW_IRQ, }; #define XEN_HYPERCALL_MSR 0x40000000 #define MIN_STEAL_TIME 50000 #define SHINFO_RACE_TIMEOUT 2 /* seconds */ #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[5]; /* Extra field for overrun check */ }; struct compat_vcpu_runstate_info { uint32_t state; uint64_t state_entry_time; uint64_t time[5]; } __attribute__((__packed__));; 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; static volatile 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(TEST_GUEST_SAW_IRQ); } 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; int i; __asm__ __volatile__( "sti\n" "nop\n" ); /* Trigger an interrupt injection */ GUEST_SYNC(TEST_INJECT_VECTOR); guest_wait_for_irq(); /* Test having the host set runstates manually */ GUEST_SYNC(TEST_RUNSTATE_runnable); GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0); GUEST_ASSERT(rs->state == 0); GUEST_SYNC(TEST_RUNSTATE_blocked); GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0); GUEST_ASSERT(rs->state == 0); GUEST_SYNC(TEST_RUNSTATE_offline); GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0); GUEST_ASSERT(rs->state == 0); /* Test runstate time adjust */ GUEST_SYNC(TEST_RUNSTATE_ADJUST); GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a); GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b); /* Test runstate time set */ GUEST_SYNC(TEST_RUNSTATE_DATA); 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(TEST_STEAL_TIME); GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME); /* Attempt to deliver a *masked* interrupt */ GUEST_SYNC(TEST_EVTCHN_MASKED); /* 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(TEST_EVTCHN_UNMASKED); guest_wait_for_irq(); /* Change memslots and deliver an interrupt */ GUEST_SYNC(TEST_EVTCHN_SLOWPATH); guest_wait_for_irq(); /* Deliver event channel with KVM_XEN_HVM_EVTCHN_SEND */ GUEST_SYNC(TEST_EVTCHN_SEND_IOCTL); guest_wait_for_irq(); GUEST_SYNC(TEST_EVTCHN_HCALL); /* Our turn. Deliver event channel (to ourselves) with * EVTCHNOP_send hypercall. */ struct evtchn_send s = { .port = 127 }; xen_hypercall(__HYPERVISOR_event_channel_op, EVTCHNOP_send, &s); guest_wait_for_irq(); GUEST_SYNC(TEST_EVTCHN_HCALL_SLOWPATH); /* * Same again, but this time the host has messed with memslots so it * should take the slow path in kvm_xen_set_evtchn(). */ xen_hypercall(__HYPERVISOR_event_channel_op, EVTCHNOP_send, &s); guest_wait_for_irq(); GUEST_SYNC(TEST_EVTCHN_HCALL_EVENTFD); /* Deliver "outbound" event channel to an eventfd which * happens to be one of our own irqfds. */ s.port = 197; xen_hypercall(__HYPERVISOR_event_channel_op, EVTCHNOP_send, &s); guest_wait_for_irq(); GUEST_SYNC(TEST_TIMER_SETUP); /* Set a timer 100ms in the future. */ xen_hypercall(__HYPERVISOR_set_timer_op, rs->state_entry_time + 100000000, NULL); GUEST_SYNC(TEST_TIMER_WAIT); /* Now wait for the timer */ guest_wait_for_irq(); GUEST_SYNC(TEST_TIMER_RESTORE); /* The host has 'restored' the timer. Just wait for it. */ guest_wait_for_irq(); GUEST_SYNC(TEST_POLL_READY); /* 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, }; xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p); GUEST_SYNC(TEST_POLL_TIMEOUT); /* Poll for an unset port and wait for the timeout. */ p.timeout = 100000000; xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p); GUEST_SYNC(TEST_POLL_MASKED); /* A timer will wake the masked port we're waiting on, while we poll */ p.timeout = 0; xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p); GUEST_SYNC(TEST_POLL_WAKE); /* 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; xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p); guest_wait_for_irq(); GUEST_SYNC(TEST_TIMER_PAST); /* Timer should have fired already */ guest_wait_for_irq(); GUEST_SYNC(TEST_LOCKING_SEND_RACE); /* Racing host ioctls */ guest_wait_for_irq(); GUEST_SYNC(TEST_LOCKING_POLL_RACE); /* Racing vmcall against host ioctl */ ports[0] = 0; p = (struct sched_poll) { .ports = ports, .nr_ports = 1, .timeout = 0 }; wait_for_timer: /* * Poll for a timer wake event while the worker thread is mucking with * the shared info. KVM XEN drops timer IRQs if the shared info is * invalid when the timer expires. Arbitrarily poll 100 times before * giving up and asking the VMM to re-arm the timer. 100 polls should * consume enough time to beat on KVM without taking too long if the * timer IRQ is dropped due to an invalid event channel. */ for (i = 0; i < 100 && !guest_saw_irq; i++) __xen_hypercall(__HYPERVISOR_sched_op, SCHEDOP_poll, &p); /* * Re-send the timer IRQ if it was (likely) dropped due to the timer * expiring while the event channel was invalid. */ if (!guest_saw_irq) { GUEST_SYNC(TEST_LOCKING_POLL_TIMEOUT); goto wait_for_timer; } guest_saw_irq = false; GUEST_SYNC(TEST_DONE); } 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; } static struct vcpu_info *vinfo; static struct kvm_vcpu *vcpu; static void handle_alrm(int sig) { if (vinfo) printf("evtchn_upcall_pending 0x%x\n", vinfo->evtchn_upcall_pending); vcpu_dump(stdout, vcpu, 0); TEST_FAIL("IRQ delivery timed out"); } static void *juggle_shinfo_state(void *arg) { struct kvm_vm *vm = (struct kvm_vm *)arg; struct kvm_xen_hvm_attr cache_activate = { .type = KVM_XEN_ATTR_TYPE_SHARED_INFO, .u.shared_info.gfn = SHINFO_REGION_GPA / PAGE_SIZE }; struct kvm_xen_hvm_attr cache_deactivate = { .type = KVM_XEN_ATTR_TYPE_SHARED_INFO, .u.shared_info.gfn = KVM_XEN_INVALID_GFN }; for (;;) { __vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &cache_activate); __vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &cache_deactivate); pthread_testcancel(); } return NULL; } int main(int argc, char *argv[]) { struct timespec min_ts, max_ts, vm_ts; struct kvm_xen_hvm_attr evt_reset; struct kvm_vm *vm; pthread_t thread; bool verbose; int ret; verbose = argc > 1 && (!strncmp(argv[1], "-v", 3) || !strncmp(argv[1], "--verbose", 10)); int xen_caps = kvm_check_cap(KVM_CAP_XEN_HVM); TEST_REQUIRE(xen_caps & KVM_XEN_HVM_CONFIG_SHARED_INFO); bool do_runstate_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE); bool do_runstate_flag = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE_UPDATE_FLAG); 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_with_one_vcpu(&vcpu, guest_code); /* Map a region for the shared_info page */ vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, SHINFO_REGION_GPA, SHINFO_REGION_SLOT, 3, 0); virt_map(vm, SHINFO_REGION_GVA, SHINFO_REGION_GPA, 3); 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); if (do_runstate_flag) { struct kvm_xen_hvm_attr ruf = { .type = KVM_XEN_ATTR_TYPE_RUNSTATE_UPDATE_FLAG, .u.runstate_update_flag = 1, }; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &ruf); ruf.u.runstate_update_flag = 0; vm_ioctl(vm, KVM_XEN_HVM_GET_ATTR, &ruf); TEST_ASSERT(ruf.u.runstate_update_flag == 1, "Failed to read back RUNSTATE_UPDATE_FLAG attr"); } 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(vcpu, 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(vcpu, 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(vcpu); 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(vcpu, 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.info); 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(vcpu, 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 (;;) { struct ucall uc; vcpu_run(vcpu); TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO); switch (get_ucall(vcpu, &uc)) { case UCALL_ABORT: REPORT_GUEST_ASSERT(uc); /* 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 TEST_INJECT_VECTOR: if (verbose) printf("Delivering evtchn upcall\n"); evtchn_irq_expected = true; vinfo->evtchn_upcall_pending = 1; break; case TEST_RUNSTATE_runnable...TEST_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] + RUNSTATE_runnable - TEST_RUNSTATE_runnable; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst); break; case TEST_RUNSTATE_ADJUST: 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(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst); break; case TEST_RUNSTATE_DATA: 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(vcpu, KVM_XEN_VCPU_SET_ATTR, &rst); break; case TEST_STEAL_TIME: 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 TEST_EVTCHN_MASKED: 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 TEST_EVTCHN_UNMASKED: 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 TEST_EVTCHN_SLOWPATH: 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 TEST_EVTCHN_SEND_IOCTL: 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 TEST_EVTCHN_HCALL: 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 TEST_EVTCHN_HCALL_SLOWPATH: 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 direct to evtchn after memslot change\n"); vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, DUMMY_REGION_GPA_2, DUMMY_REGION_SLOT_2, 1, 0); evtchn_irq_expected = true; alarm(1); break; case TEST_EVTCHN_HCALL_EVENTFD: 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 TEST_TIMER_SETUP: 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 TEST_TIMER_WAIT: memset(&tmr, 0, sizeof(tmr)); tmr.type = KVM_XEN_VCPU_ATTR_TYPE_TIMER; vcpu_ioctl(vcpu, 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 TEST_TIMER_RESTORE: 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(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr); evtchn_irq_expected = true; alarm(1); break; case TEST_POLL_READY: 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 TEST_POLL_TIMEOUT: if (verbose) printf("Testing SCHEDOP_poll timeout\n"); shinfo->evtchn_pending[0] = 0; alarm(1); break; case TEST_POLL_MASKED: if (verbose) printf("Testing SCHEDOP_poll wake on masked event\n"); tmr.u.timer.expires_ns = rs->state_entry_time + 100000000; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr); alarm(1); break; case TEST_POLL_WAKE: 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(vcpu, 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(vcpu, 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 TEST_TIMER_PAST: 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(vcpu, 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(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr); alarm(1); break; case TEST_LOCKING_SEND_RACE: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); alarm(0); if (verbose) printf("Testing shinfo lock corruption (KVM_XEN_HVM_EVTCHN_SEND)\n"); ret = pthread_create(&thread, NULL, &juggle_shinfo_state, (void *)vm); TEST_ASSERT(ret == 0, "pthread_create() failed: %s", strerror(ret)); struct kvm_irq_routing_xen_evtchn uxe = { .port = 1, .vcpu = vcpu->id, .priority = KVM_IRQ_ROUTING_XEN_EVTCHN_PRIO_2LEVEL }; evtchn_irq_expected = true; for (time_t t = time(NULL) + SHINFO_RACE_TIMEOUT; time(NULL) < t;) __vm_ioctl(vm, KVM_XEN_HVM_EVTCHN_SEND, &uxe); break; case TEST_LOCKING_POLL_RACE: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); if (verbose) printf("Testing shinfo lock corruption (SCHEDOP_poll)\n"); shinfo->evtchn_pending[0] = 1; evtchn_irq_expected = true; tmr.u.timer.expires_ns = rs->state_entry_time + SHINFO_RACE_TIMEOUT * 1000000000ULL; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr); break; case TEST_LOCKING_POLL_TIMEOUT: /* * Optional and possibly repeated sync point. * Injecting the timer IRQ may fail if the * shinfo is invalid when the timer expires. * If the timer has expired but the IRQ hasn't * been delivered, rearm the timer and retry. */ vcpu_ioctl(vcpu, KVM_XEN_VCPU_GET_ATTR, &tmr); /* Resume the guest if the timer is still pending. */ if (tmr.u.timer.expires_ns) break; /* All done if the IRQ was delivered. */ if (!evtchn_irq_expected) break; tmr.u.timer.expires_ns = rs->state_entry_time + SHINFO_RACE_TIMEOUT * 1000000000ULL; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &tmr); break; case TEST_DONE: TEST_ASSERT(!evtchn_irq_expected, "Expected event channel IRQ but it didn't happen"); ret = pthread_cancel(thread); TEST_ASSERT(ret == 0, "pthread_cancel() failed: %s", strerror(ret)); ret = pthread_join(thread, 0); TEST_ASSERT(ret == 0, "pthread_join() failed: %s", strerror(ret)); goto done; case TEST_GUEST_SAW_IRQ: 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: evt_reset.type = KVM_XEN_ATTR_TYPE_EVTCHN; evt_reset.u.evtchn.flags = KVM_XEN_EVTCHN_RESET; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &evt_reset); 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(vcpu, 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]); } } /* * Exercise runstate info at all points across the page boundary, in * 32-bit and 64-bit mode. In particular, test the case where it is * configured in 32-bit mode and then switched to 64-bit mode while * active, which takes it onto the second page. */ unsigned long runstate_addr; struct compat_vcpu_runstate_info *crs; for (runstate_addr = SHINFO_REGION_GPA + PAGE_SIZE + PAGE_SIZE - sizeof(*rs) - 4; runstate_addr < SHINFO_REGION_GPA + PAGE_SIZE + PAGE_SIZE + 4; runstate_addr++) { rs = addr_gpa2hva(vm, runstate_addr); crs = (void *)rs; memset(rs, 0xa5, sizeof(*rs)); /* Set to compatibility mode */ lm.u.long_mode = 0; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &lm); /* Set runstate to new address (kernel will write it) */ struct kvm_xen_vcpu_attr st = { .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR, .u.gpa = runstate_addr, }; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &st); if (verbose) printf("Compatibility runstate at %08lx\n", runstate_addr); TEST_ASSERT(crs->state == rst.u.runstate.state, "Runstate mismatch"); TEST_ASSERT(crs->state_entry_time == rst.u.runstate.state_entry_time, "State entry time mismatch"); TEST_ASSERT(crs->time[RUNSTATE_running] == rst.u.runstate.time_running, "Running time mismatch"); TEST_ASSERT(crs->time[RUNSTATE_runnable] == rst.u.runstate.time_runnable, "Runnable time mismatch"); TEST_ASSERT(crs->time[RUNSTATE_blocked] == rst.u.runstate.time_blocked, "Blocked time mismatch"); TEST_ASSERT(crs->time[RUNSTATE_offline] == rst.u.runstate.time_offline, "Offline time mismatch"); TEST_ASSERT(crs->time[RUNSTATE_offline + 1] == 0xa5a5a5a5a5a5a5a5ULL, "Structure overrun"); TEST_ASSERT(crs->state_entry_time == crs->time[0] + crs->time[1] + crs->time[2] + crs->time[3], "runstate times don't add up"); /* Now switch to 64-bit mode */ lm.u.long_mode = 1; vm_ioctl(vm, KVM_XEN_HVM_SET_ATTR, &lm); memset(rs, 0xa5, sizeof(*rs)); /* Don't change the address, just trigger a write */ struct kvm_xen_vcpu_attr adj = { .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST, .u.runstate.state = (uint64_t)-1 }; vcpu_ioctl(vcpu, KVM_XEN_VCPU_SET_ATTR, &adj); if (verbose) printf("64-bit runstate at %08lx\n", runstate_addr); 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->time[RUNSTATE_offline + 1] == 0xa5a5a5a5a5a5a5a5ULL, "Structure overrun"); 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; } |