On 7/10/24 17:05, Pratik R. Sampat wrote:
> 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>
> ---
> .../selftests/kvm/x86_64/sev_smoke_test.c | 57 +++++++++++++++++++
> 1 file changed, 57 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 1a50a280173c..500c67b3793b 100644
> --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
> +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c
> @@ -131,12 +131,69 @@ static void test_sync_vmsa(uint32_t type, uint32_t policy)
> kvm_vm_free(vm);
> }
>
> +static void sev_guest_status_assert(struct kvm_vm *vm, uint32_t type)
> +{
> + struct kvm_sev_guest_status status;
> + bool cond;
> + int ret;
> +
> + ret = __vm_sev_ioctl(vm, KVM_SEV_GUEST_STATUS, &status);
> + cond = type == KVM_X86_SEV_VM ? !ret : ret;
> + TEST_ASSERT(cond,
> + "KVM_SEV_GUEST_STATUS should fail, invalid VM Type.");
> +}
> +
> +static void test_sev_launch(void *guest_code, uint32_t type, uint64_t policy)
> +{
> + struct kvm_vcpu *vcpu;
> + struct kvm_vm *vm;
> + struct ucall uc;
> + bool cond;
> + int ret;
> +
Maybe a block comment here indicating what you're actually doing would
be good, because I'm a bit confused.
A policy value of 0 is valid for SEV, so you expect each call to
succeed, right? And, actually, for SEV-ES the launch start will succeed,
too, but the launch update will fail because LAUNCH_UPDATE_VMSA is not
valid for SEV, but then the launch measure should succeed. Is that
right? What about the other calls?
Thanks,
Tom
> + vm = vm_sev_create_with_one_vcpu(type, guest_code, &vcpu);
> + ret = sev_vm_launch_start(vm, 0);
> + cond = type == KVM_X86_SEV_VM ? !ret : ret;
> + TEST_ASSERT(cond,
> + "KVM_SEV_LAUNCH_START should fail, invalid policy.");
> +
> + ret = sev_vm_launch_update(vm, policy);
> + cond = type == KVM_X86_SEV_VM ? !ret : ret;
> + TEST_ASSERT(cond,
> + "KVM_SEV_LAUNCH_UPDATE should fail, invalid policy.");
> + sev_guest_status_assert(vm, type);
> +
> + ret = sev_vm_launch_measure(vm, alloca(256));
> + cond = type == KVM_X86_SEV_VM ? !ret : ret;
> + TEST_ASSERT(cond,
> + "KVM_SEV_LAUNCH_MEASURE should fail, invalid policy.");
> + sev_guest_status_assert(vm, type);
> +
> + ret = sev_vm_launch_finish(vm);
> + cond = type == KVM_X86_SEV_VM ? !ret : ret;
> + TEST_ASSERT(cond,
> + "KVM_SEV_LAUNCH_FINISH should fail, invalid policy.");
> + sev_guest_status_assert(vm, type);
> +
> + vcpu_run(vcpu);
> + get_ucall(vcpu, &uc);
> + cond = type == KVM_X86_SEV_VM ?
> + vcpu->run->exit_reason == KVM_EXIT_IO :
> + vcpu->run->exit_reason == KVM_EXIT_FAIL_ENTRY;
> + TEST_ASSERT(cond,
> + "vcpu_run should fail, invalid policy.");
> +
> + 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. */
