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Sampat" To: , , , , CC: , , , , , , , , , , , , , , Subject: [PATCH v7 10/10] KVM: selftests: Add a basic SEV-SNP smoke test Date: Fri, 21 Feb 2025 15:02:00 -0600 Message-ID: <20250221210200.244405-11-prsampat@amd.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250221210200.244405-1-prsampat@amd.com> References: <20250221210200.244405-1-prsampat@amd.com> Precedence: bulk X-Mailing-List: linux-crypto@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: BL02EPF00021F6E:EE_|SA3PR12MB9106:EE_ X-MS-Office365-Filtering-Correlation-Id: 4e7be86d-2b31-44a9-2917-08dd52bb5329 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|7416014|376014|36860700013; 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)(82310400026)(1800799024)(7416014)(376014)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Feb 2025 21:04:26.3265 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4e7be86d-2b31-44a9-2917-08dd52bb5329 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: BL02EPF00021F6E.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB9106 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 --- v6..v7: * Remove FW version checks for SNP (Sean) * Include testing for policy flag SNP_POLICY_DBG * Rework test in accordance with the last deduplication cleanup of main() --- .../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; }