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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Feb 2025 09:39:00.0381 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: abc6d85e-90ee-429d-325c-08dd57dbbae2 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: DS1PEPF00017095.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7772 From: Peter Gonda Add helper functions for guest code to check the status of SEV and SEV-ES. Cc: Paolo Bonzini Cc: Claudio Imbrenda Cc: Sean Christopherson Cc: Carlos Bilbao Cc: Tom Lendacky Cc: Michael Roth Signed-off-by: Peter Gonda Signed-off-by: Neeraj Upadhyay --- tools/testing/selftests/kvm/include/x86/sev.h | 4 ++++ tools/testing/selftests/kvm/lib/x86/sev.c | 17 +++++++++++++++++ .../testing/selftests/kvm/x86/sev_smoke_test.c | 11 +++-------- 3 files changed, 24 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86/sev.h b/tools/testing/selftests/kvm/include/x86/sev.h index 0b4411847cbf..437e397ddd29 100644 --- a/tools/testing/selftests/kvm/include/x86/sev.h +++ b/tools/testing/selftests/kvm/include/x86/sev.h @@ -147,4 +147,8 @@ static inline void snp_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa, vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_UPDATE, &update_data); } +bool is_sev_enabled(void); +bool is_sev_es_enabled(void); +bool is_sev_snp_enabled(void); + #endif /* SELFTEST_KVM_SEV_H */ diff --git a/tools/testing/selftests/kvm/lib/x86/sev.c b/tools/testing/selftests/kvm/lib/x86/sev.c index dd7ccf0324c5..0c542eae4184 100644 --- a/tools/testing/selftests/kvm/lib/x86/sev.c +++ b/tools/testing/selftests/kvm/lib/x86/sev.c @@ -306,3 +306,20 @@ void vm_sev_launch(struct kvm_vm *vm, uint64_t policy, uint8_t *measurement) sev_vm_launch_finish(vm); } + +bool is_sev_enabled(void) +{ + return rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ENABLED; +} + +bool is_sev_es_enabled(void) +{ + return is_sev_enabled() && + rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ES_ENABLED; +} + +bool is_sev_snp_enabled(void) +{ + return is_sev_es_enabled() && + rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_SNP_ENABLED; +} diff --git a/tools/testing/selftests/kvm/x86/sev_smoke_test.c b/tools/testing/selftests/kvm/x86/sev_smoke_test.c index 4fcd0f6290ae..29382dcab18c 100644 --- a/tools/testing/selftests/kvm/x86/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86/sev_smoke_test.c @@ -18,11 +18,7 @@ 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); + GUEST_ASSERT(is_sev_snp_enabled()); wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ); VMGEXIT(); @@ -31,8 +27,7 @@ static void guest_snp_code(void) static void guest_sev_es_code(void) { /* TODO: Check CPUID after GHCB-based hypercall support is added. */ - GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ENABLED); - GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ES_ENABLED); + GUEST_ASSERT(is_sev_es_enabled()); /* * TODO: Add GHCB and ucall support for SEV-ES guests. For now, simply @@ -45,7 +40,7 @@ static void guest_sev_es_code(void) static void guest_sev_code(void) { GUEST_ASSERT(this_cpu_has(X86_FEATURE_SEV)); - GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ENABLED); + GUEST_ASSERT(is_sev_enabled()); GUEST_DONE(); }