diff options
Diffstat (limited to 'src/basic/confidential-virt.c')
| -rw-r--r-- | src/basic/confidential-virt.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/basic/confidential-virt.c b/src/basic/confidential-virt.c index b6521cf5bf..8a88a3eb83 100644 --- a/src/basic/confidential-virt.c +++ b/src/basic/confidential-virt.c @@ -76,7 +76,7 @@ static uint64_t msr(uint64_t index) { return ret; } -static bool detect_hyperv_sev(void) { +static bool detect_hyperv_cvm(uint32_t isoltype) { uint32_t eax, ebx, ecx, edx, feat; char sig[13] = {}; @@ -100,7 +100,7 @@ static bool detect_hyperv_sev(void) { ebx = ecx = edx = 0; cpuid(&eax, &ebx, &ecx, &edx); - if ((ebx & CPUID_HYPERV_ISOLATION_TYPE_MASK) == CPUID_HYPERV_ISOLATION_TYPE_SNP) + if ((ebx & CPUID_HYPERV_ISOLATION_TYPE_MASK) == isoltype) return true; } @@ -133,7 +133,7 @@ static ConfidentialVirtualization detect_sev(void) { if (!(eax & EAX_SEV)) { log_debug("No sev in CPUID, trying hyperv CPUID"); - if (detect_hyperv_sev()) + if (detect_hyperv_cvm(CPUID_HYPERV_ISOLATION_TYPE_SNP)) return CONFIDENTIAL_VIRTUALIZATION_SEV_SNP; log_debug("No hyperv CPUID"); @@ -171,6 +171,11 @@ static ConfidentialVirtualization detect_tdx(void) { if (memcmp(sig, CPUID_SIG_INTEL_TDX, sizeof(sig)) == 0) return CONFIDENTIAL_VIRTUALIZATION_TDX; + log_debug("No tdx in CPUID, trying hyperv CPUID"); + + if (detect_hyperv_cvm(CPUID_HYPERV_ISOLATION_TYPE_TDX)) + return CONFIDENTIAL_VIRTUALIZATION_TDX; + return CONFIDENTIAL_VIRTUALIZATION_NONE; } |