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OvmfPkg: Add support to perform SEV-ES initialization 

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

When SEV-ES is enabled, then SEV is also enabled. Add support to the SEV
initialization function to also check for SEV-ES being enabled, and if
enabled, set the SEV-ES enabled PCD (PcdSevEsIsEnabled).

Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Tom Lendacky 2020-08-12 15:21:39 -05:00 committed by mergify[bot]
parent 0afa1d08f1
commit cf845a749a
5 changed files with 36 additions and 0 deletions
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3
OvmfPkg/OvmfPkgIa32.dsc
View File

@ -607,6 +607,9 @@
# Set memory encryption mask
gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
# Set SEV-ES defaults
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled|0
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes|8
gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase|FALSE

3
OvmfPkg/OvmfPkgIa32X64.dsc
View File

@ -619,6 +619,9 @@
# Set memory encryption mask
gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
# Set SEV-ES defaults
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled|0
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes|8
gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase|FALSE

3
OvmfPkg/OvmfPkgX64.dsc
View File

@ -617,6 +617,9 @@
# Set memory encryption mask
gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
# Set SEV-ES defaults
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled|0
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes|8
gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase|FALSE

26
OvmfPkg/PlatformPei/AmdSev.c
View File

@ -21,6 +21,27 @@
#include "Platform.h"
/**
Initialize SEV-ES support if running as an SEV-ES guest.
**/
STATIC
VOID
AmdSevEsInitialize (
VOID
)
{
RETURN_STATUS PcdStatus;
if (!MemEncryptSevEsIsEnabled ()) {
return;
}
PcdStatus = PcdSetBoolS (PcdSevEsIsEnabled, TRUE);
ASSERT_RETURN_ERROR (PcdStatus);
}
/**
Function checks if SEV support is available, if present then it sets
@ -103,4 +124,9 @@ AmdSevInitialize (
);
}
}
//
// Check and perform SEV-ES initialization if required.
//
AmdSevEsInitialize ();
}

1
OvmfPkg/PlatformPei/PlatformPei.inf
View File

@ -103,6 +103,7 @@
gUefiCpuPkgTokenSpaceGuid.PcdCpuMaxLogicalProcessorNumber
gUefiCpuPkgTokenSpaceGuid.PcdCpuBootLogicalProcessorNumber
gUefiCpuPkgTokenSpaceGuid.PcdCpuApStackSize
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled
[FixedPcd]
gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress