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 <oupton@xxxxxxxxxx>
---
.../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
