Assert that the vCPU exits to userspace with KVM_SYSTEM_EVENT_SUSPEND if
the guest calls PSCI SYSTEM_SUSPEND. Additionally, guarantee that the
SMC32 and SMC64 flavors of this call are discoverable with the
PSCI_FEATURES call.
Signed-off-by: Oliver Upton <oupton@xxxxxxxxxx>
---
.../testing/selftests/kvm/aarch64/psci_test.c | 69 +++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/tools/testing/selftests/kvm/aarch64/psci_test.c b/tools/testing/selftests/kvm/aarch64/psci_test.c
index 535130d5e97f..88541de21c41 100644
--- a/tools/testing/selftests/kvm/aarch64/psci_test.c
+++ b/tools/testing/selftests/kvm/aarch64/psci_test.c
@@ -45,6 +45,25 @@ 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 uint64_t psci_features(uint32_t func_id)
+{
+ struct arm_smccc_res res;
+
+ smccc_hvc(PSCI_1_0_FN_PSCI_FEATURES, func_id, 0, 0, 0, 0, 0, 0, &res);
+
+ return res.a0;
+}
+
static void vcpu_power_off(struct kvm_vm *vm, uint32_t vcpuid)
{
struct kvm_mp_state mp_state = {
@@ -137,8 +156,58 @@ 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 guest_test_system_suspend(void)
+{
+ uint64_t ret;
+
+ /* assert that SYSTEM_SUSPEND is discoverable */
+ GUEST_ASSERT(!psci_features(PSCI_1_0_FN_SYSTEM_SUSPEND));
+ GUEST_ASSERT(!psci_features(PSCI_1_0_FN64_SYSTEM_SUSPEND));
+
+ ret = psci_system_suspend(CPU_ON_ENTRY_ADDR, CPU_ON_CONTEXT_ID);
+ GUEST_SYNC(ret);
+}
+
+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);
+
+ 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();
return 0;
}
--
2.36.0.464.gb9c8b46e94-goog
