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Miller" , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Mon, Feb 23, 2026, Tycho Andersen wrote: > diff --git a/tools/testing/selftests/kvm/x86/sev_smoke_test.c b/tools/testing/selftests/kvm/x86/sev_smoke_test.c > index 86ad1c7d068f..c7fda9fc324b 100644 > --- a/tools/testing/selftests/kvm/x86/sev_smoke_test.c > +++ b/tools/testing/selftests/kvm/x86/sev_smoke_test.c > @@ -213,13 +213,48 @@ static void test_sev_smoke(void *guest, uint32_t type, uint64_t policy) > } > } > > +static bool sev_es_allowed(void) > +{ > + struct kvm_sev_launch_start launch_start = { > + .policy = SEV_POLICY_ES, > + }; > + struct kvm_vcpu *vcpu; > + struct kvm_vm *vm; > + int firmware_error, ret; > + bool supported = true; > + > + if (!kvm_cpu_has(X86_FEATURE_SEV_ES)) > + return false; > + > + if (!kvm_cpu_has(X86_FEATURE_SEV_SNP)) > + return true; > + > + /* > + * In some cases when SEV-SNP is enabled, firmware disallows starting > + * an SEV-ES VM. When SEV-SNP is enabled try to launch an SEV-ES, and > + * check the underlying firmware error for this case. > + */ > + vm = vm_sev_create_with_one_vcpu(KVM_X86_SEV_ES_VM, guest_sev_es_code, > + &vcpu); If there's a legimate reason why an SEV-ES VM can't be created, then that needs to be explicitly enumerated in some way by the kernel. E.g. is this due to lack of ASIDs due to CipherTextHiding or something? Throwing a noodle to see if it sticks is not an option. > + > + ret = __vm_sev_ioctl(vm, KVM_SEV_LAUNCH_START, &launch_start, > + &firmware_error); > + if (ret == -1 && firmware_error == SEV_RET_UNSUPPORTED) { > + pr_info("SEV-ES not supported with SNP\n"); > + supported = false; > + } > + > + kvm_vm_free(vm); > + return supported; > +} > + > int main(int argc, char *argv[]) > { > TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SEV)); > > test_sev_smoke(guest_sev_code, KVM_X86_SEV_VM, 0); > > - if (kvm_cpu_has(X86_FEATURE_SEV_ES)) > + if (sev_es_allowed()) > test_sev_smoke(guest_sev_es_code, KVM_X86_SEV_ES_VM, SEV_POLICY_ES); > > if (kvm_cpu_has(X86_FEATURE_SEV_SNP)) > -- > 2.53.0 >