diff options
| author | Pratik R. Sampat <prsampat@amd.com> | 2025-03-05 17:00:00 -0600 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-05-02 13:05:32 -0700 |
| commit | ada014f5fc676bf16327c252587e0c856234bc13 (patch) | |
| tree | 373f9a9113d50e6e7c617388f52b6bb80a7fbcda | |
| parent | a5d55f783fb73ad06d2e4358b24d6c2a75991350 (diff) | |
KVM: selftests: Add a basic SEV-SNP smoke test
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 <prsampat@amd.com>
Link: https://lore.kernel.org/r/20250305230000.231025-11-prsampat@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | tools/testing/selftests/kvm/x86/sev_smoke_test.c | 25 |
1 files 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 d9388e99a4f9..77256c89bb8d 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. */ @@ -180,7 +192,10 @@ 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) @@ -191,7 +206,10 @@ 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); } } @@ -204,5 +222,8 @@ 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; } |