From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E799D318EE4; Mon, 23 Feb 2026 16:31:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771864283; cv=none; b=dZLSfD0EDgcOUsgfx1lUeXOV1PExVgKY80qJCC7zIwiPCuOr6pDP/yLzWYUDzOXoUROPk0SSae19RGhuJmWKcLfoM+XdXQvSncqoEVHnokXE5hsEURD+j7vPMRnesIDyXOmLc4QzKpXWDDBX06Vy4mqYioPD98L1wB//xJGpjeo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771864283; c=relaxed/simple; bh=j1r3jSLPXenJHWtPXhz5B7SgywI7mhO4sMwe7uArPqU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u4qn6yFgwdDKf9JegTefXylKobqtuNC/MVpf6UY0MdpnhxJbbJFCcfaRL8Q9avDlG7lcDoRdcx9aeRtfzezfO/kWuLg9r5o103qKP6/bLTmVW+ecTyPz8HTz3Pn6rEu5ebqtEpK5MIhsqf2sUo8noX4YaUjCXJ8+bJV8NPKGWUI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=otBREyNn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="otBREyNn" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 586E3C116C6; Mon, 23 Feb 2026 16:31:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771864282; bh=j1r3jSLPXenJHWtPXhz5B7SgywI7mhO4sMwe7uArPqU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=otBREyNnNk8AW78n036fGfwS99ZdT9JlzE5JAsSaMyKPog0DePiD6RiRSFHPoV/pk YJKt9fsRWqzJZMDXCj3ughu8qlPw9TFsw61ZxyxF0CO5b1LDQTNiR8VcwS2M3FSl8L zbPbauzaTHhOG1mJRfI0mW1eXZbHHcuo+MYccSqbKMplakC1Ehmk/lawsRyL+dLSAX kK2dNGjKQhuMNDT8B0h0C3n76yIDegAIKG9gDcKXW78TQiGrIz+NhkzamqDnjkVz1K 0hesc+vGPtelDsV+UTFmAW/ymbBHMXNuoSUlOoEWkB6t2H+VXX/HbIa/VIL6HwRlln NXgjBCsvKstHw== From: Tycho Andersen To: Ashish Kalra , Tom Lendacky , John Allen , Herbert Xu , Sean Christopherson , Paolo Bonzini , Shuah Khan , "David S. Miller" Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 2/4] selftests/kvm: check that SEV-ES VMs are allowed in SEV-SNP mode Date: Mon, 23 Feb 2026 09:28:58 -0700 Message-ID: <20260223162900.772669-3-tycho@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260223162900.772669-1-tycho@kernel.org> References: <20260223162900.772669-1-tycho@kernel.org> Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: "Tycho Andersen (AMD)" As in the comment, check to make sure that SEV-ES VMs are allowed before running the test. Otherwise, there is a generic: ==== Test Assertion Failure ==== lib/x86/sev.c:91: !ret pid=3678 tid=3678 errno=5 - Input/output error 1 0x0000000000417000: sev_vm_launch at sev.c:91 (discriminator 4) 2 0x0000000000417d49: vm_sev_launch at sev.c:191 3 0x0000000000402a7d: test_sev at sev_smoke_test.c:132 4 0x000000000040328f: test_sev_smoke at sev_smoke_test.c:198 5 0x00000000004026c8: main at sev_smoke_test.c:223 6 0x00007fdde5c2a1c9: ?? ??:0 7 0x00007fdde5c2a28a: ?? ??:0 8 0x00000000004027f4: _start at ??:? KVM_SEV_LAUNCH_START failed, rc: -1 errno: 5 (Input/output error) Signed-off-by: Tycho Andersen (AMD) --- .../selftests/kvm/x86/sev_smoke_test.c | 37 ++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) 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); + + 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