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Sampat" To: , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v8 10/10] KVM: selftests: Add a basic SEV-SNP smoke test Date: Wed, 5 Mar 2025 17:00:00 -0600 Message-ID: <20250305230000.231025-11-prsampat@amd.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250305230000.231025-1-prsampat@amd.com> References: <20250305230000.231025-1-prsampat@amd.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MN1PEPF0000F0DF:EE_|DM6PR12MB4353:EE_ X-MS-Office365-Filtering-Correlation-Id: a91919c2-a281-41aa-33ee-08dd5c39d1cd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(7416014)(376014)(36860700013)(1800799024)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Mar 2025 23:02:35.8787 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a91919c2-a281-41aa-33ee-08dd5c39d1cd X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: MN1PEPF0000F0DF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4353 Extend sev_smoke_test to also run a minimal SEV-SNP smoke test that initializes and sets up private memory regions required to run a simple SEV-SNP guest. Similar to its SEV-ES smoke test counterpart, this also does not support GHCB and ucall yet and uses the GHCB MSR protocol to trigger an exit of the type KVM_EXIT_SYSTEM_EVENT. Signed-off-by: Pratik R. Sampat --- .../selftests/kvm/x86/sev_smoke_test.c | 25 +++++++++++++++++-- 1 file changed, 23 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/x86/sev_smoke_test.c b/tools/testing/selftests/kvm/x86/sev_smoke_test.c index 620aa7c41f7a..0505cde77358 100644 --- a/tools/testing/selftests/kvm/x86/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86/sev_smoke_test.c @@ -16,6 +16,18 @@ #define XFEATURE_MASK_X87_AVX (XFEATURE_MASK_FP | XFEATURE_MASK_SSE | XFEATURE_MASK_YMM) +static void guest_snp_code(void) +{ + uint64_t sev_msr = rdmsr(MSR_AMD64_SEV); + + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_ENABLED); + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_ES_ENABLED); + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_SNP_ENABLED); + + wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ); + vmgexit(); +} + static void guest_sev_es_code(void) { /* TODO: Check CPUID after GHCB-based hypercall support is added. */ @@ -179,7 +191,10 @@ static void test_sev_smoke(void *guest, uint32_t type, uint64_t policy) { const u64 xf_mask = XFEATURE_MASK_X87_AVX; - test_sev(guest, type, policy | SEV_POLICY_NO_DBG); + if (type == KVM_X86_SNP_VM) + test_sev(guest, type, policy | SNP_POLICY_DBG); + else + test_sev(guest, type, policy | SEV_POLICY_NO_DBG); test_sev(guest, type, policy); if (type == KVM_X86_SEV_VM) @@ -190,7 +205,10 @@ static void test_sev_smoke(void *guest, uint32_t type, uint64_t policy) if (kvm_has_cap(KVM_CAP_XCRS) && (xgetbv(0) & kvm_cpu_supported_xcr0() & xf_mask) == xf_mask) { test_sync_vmsa(type, policy); - test_sync_vmsa(type, policy | SEV_POLICY_NO_DBG); + if (type == KVM_X86_SNP_VM) + test_sync_vmsa(type, policy | SNP_POLICY_DBG); + else + test_sync_vmsa(type, policy | SEV_POLICY_NO_DBG); } } @@ -203,5 +221,8 @@ int main(int argc, char *argv[]) if (kvm_cpu_has(X86_FEATURE_SEV_ES)) test_sev_smoke(guest_sev_es_code, KVM_X86_SEV_ES_VM, SEV_POLICY_ES); + if (kvm_cpu_has(X86_FEATURE_SEV_SNP)) + test_sev_smoke(guest_snp_code, KVM_X86_SNP_VM, snp_default_policy()); + return 0; }