Assert that the vCPU exits to userspace with KVM_SYSTEM_EVENT_SUSPEND if it correctly executes the SYSTEM_SUSPEND PSCI call. Additionally, assert that the guest PSCI call fails if preconditions are not met (more than 1 running vCPU).
Signed-off-by: Oliver Upton <[email protected]> --- .../testing/selftests/kvm/aarch64/psci_test.c | 75 +++++++++++++++++++ 1 file changed, 75 insertions(+) diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c index 90312be335da..5b881ca4d102 100644 --- a/tools/testing/selftests/kvm/aarch64/psci_test.c +++ b/tools/testing/selftests/kvm/aarch64/psci_test.c @@ -45,6 +45,16 @@ static uint64_t psci_affinity_info(uint64_t target_affinity, return res.a0; } +static uint64_t psci_system_suspend(uint64_t entry_addr, uint64_t context_id) +{ + struct arm_smccc_res res; + + smccc_hvc(PSCI_1_0_FN64_SYSTEM_SUSPEND, entry_addr, context_id, + 0, 0, 0, 0, 0, &res); + + return res.a0; +} + static void guest_test_cpu_on(uint64_t target_cpu) { GUEST_ASSERT(!psci_cpu_on(target_cpu, CPU_ON_ENTRY_ADDR, CPU_ON_CONTEXT_ID)); @@ -69,6 +79,13 @@ static void vcpu_power_off(struct kvm_vm *vm, uint32_t vcpuid) vcpu_set_mp_state(vm, vcpuid, &mp_state); } +static void guest_test_system_suspend(void) +{ + uint64_t r = psci_system_suspend(CPU_ON_ENTRY_ADDR, CPU_ON_CONTEXT_ID); + + GUEST_SYNC(r); +} + static struct kvm_vm *setup_vm(void *guest_code) { struct kvm_vcpu_init init; @@ -136,8 +153,66 @@ static void host_test_cpu_on(void) kvm_vm_free(vm); } +static void enable_system_suspend(struct kvm_vm *vm) +{ + struct kvm_enable_cap cap = { + .cap = KVM_CAP_ARM_SYSTEM_SUSPEND, + }; + + vm_enable_cap(vm, &cap); +} + +static void host_test_system_suspend(void) +{ + struct kvm_run *run; + struct kvm_vm *vm; + + vm = setup_vm(guest_test_system_suspend); + enable_system_suspend(vm); + + vcpu_power_off(vm, VCPU_ID_TARGET); + run = vcpu_state(vm, VCPU_ID_SOURCE); + + enter_guest(vm, VCPU_ID_SOURCE); + + TEST_ASSERT(run->exit_reason == KVM_EXIT_SYSTEM_EVENT, + "Unhandled exit reason: %u (%s)", + run->exit_reason, exit_reason_str(run->exit_reason)); + TEST_ASSERT(run->system_event.type == KVM_SYSTEM_EVENT_SUSPEND, + "Unhandled system event: %u (expected: %u)", + run->system_event.type, KVM_SYSTEM_EVENT_SUSPEND); + + assert_vcpu_reset(vm, VCPU_ID_SOURCE); + kvm_vm_free(vm); +} + +static void host_test_system_suspend_fails(void) +{ + struct kvm_vm *vm; + struct ucall uc; + + vm = setup_vm(guest_test_system_suspend); + enable_system_suspend(vm); + + enter_guest(vm, VCPU_ID_SOURCE); + TEST_ASSERT(get_ucall(vm, VCPU_ID_SOURCE, &uc) == UCALL_SYNC, + "Unhandled ucall: %lu", uc.cmd); + TEST_ASSERT(uc.args[1] == PSCI_RET_DENIED, + "Unrecognized PSCI return code: %lu (expected: %u)", + uc.args[1], PSCI_RET_DENIED); + + kvm_vm_free(vm); +} + int main(void) { + if (!kvm_check_cap(KVM_CAP_ARM_SYSTEM_SUSPEND)) { + print_skip("KVM_CAP_ARM_SYSTEM_SUSPEND not supported"); + exit(KSFT_SKIP); + } + host_test_cpu_on(); + host_test_system_suspend(); + host_test_system_suspend_fails(); return 0; } -- 2.33.0.685.g46640cef36-goog _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
