Introduce tests for sev and sev-es ioctl that exercises the boot path
of launch, update and finish on an invalid policy.
Signed-off-by: Pratik R. Sampat <pratikrajesh.sampat@xxxxxxx>
Tested-by: Peter Gonda <pgonda@xxxxxxxxxx>
Tested-by: Srikanth Aithal <sraithal@xxxxxxx>
---
.../selftests/kvm/x86_64/sev_smoke_test.c | 84 +++++++++++++++++++
1 file changed, 84 insertions(+)
diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
index 8e798f5a2a53..5fa4ee27609b 100644
--- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
+++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
@@ -142,12 +142,96 @@ static void test_sync_vmsa(uint32_t type, uint64_t policy)
kvm_vm_free(vm);
}
+static void sev_guest_neg_status_assert(struct kvm_vm *vm, uint32_t type)
+{
+ struct kvm_sev_guest_status status;
+ int ret;
+
+ ret = __vm_sev_ioctl(vm, KVM_SEV_GUEST_STATUS, &status);
+ TEST_ASSERT(ret, "KVM_SEV_GUEST_STATUS should fail, invalid VM Type.");
+}
+
+static void vm_sev_es_launch_neg(struct kvm_vm *vm, uint32_t type, uint64_t policy)
+{
+ int ret;
+
+ /* Launch start with policy SEV_POLICY_NO_DBG (0x0) */
+ ret = __sev_vm_launch_start(vm, 0);
+ TEST_ASSERT(ret,
+ "KVM_SEV_LAUNCH_START should fail due to type (%d) - policy(0x0) mismatch",
+ type);
+
+ ret = __sev_vm_launch_update(vm, policy);
+ TEST_ASSERT(ret,
+ "KVM_SEV_LAUNCH_UPDATE should fail due to LAUNCH_START. type: %d policy: 0x%lx",
+ type, policy);
+ sev_guest_neg_status_assert(vm, type);
+
+ ret = __sev_vm_launch_measure(vm, alloca(256));
+ TEST_ASSERT(ret,
+ "KVM_SEV_LAUNCH_UPDATE should fail due to LAUNCH_START. type: %d policy: 0x%lx",
+ type, policy);
+ sev_guest_neg_status_assert(vm, type);
+
+ ret = __sev_vm_launch_finish(vm);
+ TEST_ASSERT(ret,
+ "KVM_SEV_LAUNCH_UPDATE should fail due to LAUNCH_START. type: %d policy: 0x%lx",
+ type, policy);
+ sev_guest_neg_status_assert(vm, type);
+}
+
+/*
+ * Test for SEV ioctl launch path
+ * VMs of the type SEV and SEV-ES are created, however they are launched with
+ * an empty policy to observe the effect on the control flow of launching a VM.
+ *
+ * SEV - Expected to pass through the path of launch start, update, measure,
+ * and finish. vcpu_run expected to fail with error KVM_EXIT_IO.
+ *
+ * SEV-ES - Expected to fail the launch start as vm created with type
+ * KVM_X86_DEFAULT_VM but policy passed to launch start is KVM_X86_SEV_ES_VM.
+ * Post this, calls that pass the correct policy to update, measure, and finish
+ * are also expected to fail cascading.
+ */
+static void test_sev_launch(void *guest_code, uint32_t type, uint64_t policy)
+{
+ struct kvm_vcpu *vcpu;
+ int exp_exit_reason;
+ struct kvm_vm *vm;
+ struct ucall uc;
+
+ vm = vm_sev_create_with_one_vcpu(type, guest_code, &vcpu);
+
+ if (type == KVM_X86_SEV_VM) {
+ sev_vm_launch(vm, 0);
+ sev_vm_launch_measure(vm, alloca(256));
+ sev_vm_launch_finish(vm);
+ } else {
+ vm_sev_es_launch_neg(vm, type, policy);
+ }
+
+ vcpu_run(vcpu);
+ get_ucall(vcpu, &uc);
+ if (type == KVM_X86_SEV_VM)
+ exp_exit_reason = KVM_EXIT_IO;
+ else
+ exp_exit_reason = KVM_EXIT_FAIL_ENTRY;
+
+ TEST_ASSERT(vcpu->run->exit_reason == exp_exit_reason,
+ "vcpu_run failed exit expected: %d, got: %d",
+ exp_exit_reason, vcpu->run->exit_reason);
+
+ kvm_vm_free(vm);
+}
+
static void test_sev(void *guest_code, uint32_t type, uint64_t policy)
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
struct ucall uc;
+ test_sev_launch(guest_code, type, policy);
+
vm = vm_sev_create_with_one_vcpu(type, guest_code, &vcpu);
/* TODO: Validate the measurement is as expected. */
--
2.34.1
