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qemu_firmware: Pick the right firmware for SEV-SNP guests

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The firmware descriptors have 'amd-sev-snp` feature which
describes whether firmware is suitable for SEV-SNP guests.
Provide necessary implementation to detect the feature and pick
the right firmware if guest is SEV-SNP enabled.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Michal Privoznik 2024-06-13 14:35:57 +02:00
parent a1d850b300
commit 58b5219961
2 changed files with 16 additions and 0 deletions
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15
src/qemu/qemu_firmware.c
View File

@ -148,6 +148,7 @@ typedef enum {
QEMU_FIRMWARE_FEATURE_ACPI_S4,
QEMU_FIRMWARE_FEATURE_AMD_SEV,
QEMU_FIRMWARE_FEATURE_AMD_SEV_ES,
QEMU_FIRMWARE_FEATURE_AMD_SEV_SNP,
QEMU_FIRMWARE_FEATURE_ENROLLED_KEYS,
QEMU_FIRMWARE_FEATURE_REQUIRES_SMM,
QEMU_FIRMWARE_FEATURE_SECURE_BOOT,
@ -165,6 +166,7 @@ VIR_ENUM_IMPL(qemuFirmwareFeature,
"acpi-s4",
"amd-sev",
"amd-sev-es",
"amd-sev-snp",
"enrolled-keys",
"requires-smm",
"secure-boot",
@ -1148,6 +1150,7 @@ qemuFirmwareMatchDomain(const virDomainDef *def,
bool requiresSMM = false;
bool supportsSEV = false;
bool supportsSEVES = false;
bool supportsSEVSNP = false;
bool supportsSecureBoot = false;
bool hasEnrolledKeys = false;
int reqSecureBoot;
@ -1195,6 +1198,10 @@ qemuFirmwareMatchDomain(const virDomainDef *def,
supportsSEVES = true;
break;
case QEMU_FIRMWARE_FEATURE_AMD_SEV_SNP:
supportsSEVSNP = true;
break;
case QEMU_FIRMWARE_FEATURE_REQUIRES_SMM:
requiresSMM = true;
break;
@ -1340,6 +1347,11 @@ qemuFirmwareMatchDomain(const virDomainDef *def,
break;
case VIR_DOMAIN_LAUNCH_SECURITY_SEV_SNP:
if (!supportsSEVSNP) {
VIR_DEBUG("Domain requires SEV-SNP firmware '%s' doesn't support it",
path);
return false;
}
break;
case VIR_DOMAIN_LAUNCH_SECURITY_PV:
break;
@ -1451,6 +1463,7 @@ qemuFirmwareEnableFeaturesModern(virDomainDef *def,
case QEMU_FIRMWARE_FEATURE_ACPI_S4:
case QEMU_FIRMWARE_FEATURE_AMD_SEV:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_ES:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_SNP:
case QEMU_FIRMWARE_FEATURE_VERBOSE_DYNAMIC:
case QEMU_FIRMWARE_FEATURE_VERBOSE_STATIC:
case QEMU_FIRMWARE_FEATURE_NONE:
@ -1501,6 +1514,7 @@ qemuFirmwareSanityCheck(const qemuFirmware *fw,
case QEMU_FIRMWARE_FEATURE_ACPI_S4:
case QEMU_FIRMWARE_FEATURE_AMD_SEV:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_ES:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_SNP:
case QEMU_FIRMWARE_FEATURE_VERBOSE_DYNAMIC:
case QEMU_FIRMWARE_FEATURE_VERBOSE_STATIC:
case QEMU_FIRMWARE_FEATURE_LAST:
@ -1935,6 +1949,7 @@ qemuFirmwareGetSupported(const char *machine,
case QEMU_FIRMWARE_FEATURE_ACPI_S4:
case QEMU_FIRMWARE_FEATURE_AMD_SEV:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_ES:
case QEMU_FIRMWARE_FEATURE_AMD_SEV_SNP:
case QEMU_FIRMWARE_FEATURE_ENROLLED_KEYS:
case QEMU_FIRMWARE_FEATURE_SECURE_BOOT:
case QEMU_FIRMWARE_FEATURE_VERBOSE_DYNAMIC:

1
tests/qemufirmwaredata/out/usr/share/qemu/firmware/60-edk2-ovmf-x64-amdsev.json
View File

@ -21,6 +21,7 @@
"features": [
"amd-sev",
"amd-sev-es",
"amd-sev-snp",
"verbose-dynamic"
]
}