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UefiCpuPkg/MpInitLib: Add CPU MP data flag to indicate if SEV-ES is enabled 

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

When starting APs in an SMP configuration, the AP needs to know if it is
running as an SEV-ES guest in order to assign a GHCB page.

Add a field to the CPU_MP_DATA structure that will indicate if SEV-ES is
enabled. This new field is set during MP library initialization with the
PCD value PcdSevEsIsEnabled. This flag can then be used to determine if
SEV-ES is enabled.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Dong <eric.dong@intel.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 15:21:42 -05:00 committed by mergify[bot]
parent 0d7601e546
commit e88a5b9833
4 changed files with 5 additions and 0 deletions
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1
UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
View File

@ -71,4 +71,5 @@
gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApTargetCstate ## SOMETIMES_CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApStatusCheckIntervalInMicroSeconds ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES

1
UefiCpuPkg/Library/MpInitLib/MpLib.c
View File

@ -1704,6 +1704,7 @@ MpInitLibInitialize (
CpuMpData->CpuData = (CPU_AP_DATA *) (CpuMpData + 1);
CpuMpData->CpuInfoInHob = (UINT64) (UINTN) (CpuMpData->CpuData + MaxLogicalProcessorNumber);
InitializeSpinLock(&CpuMpData->MpLock);
CpuMpData->SevEsIsEnabled = PcdGetBool (PcdSevEsIsEnabled);
//
// Make sure no memory usage outside of the allocated buffer.

2
UefiCpuPkg/Library/MpInitLib/MpLib.h
View File

@ -276,6 +276,8 @@ struct _CPU_MP_DATA {
// driver.
//
BOOLEAN WakeUpByInitSipiSipi;
BOOLEAN SevEsIsEnabled;
};
extern EFI_GUID mCpuInitMpLibHobGuid;

1
UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
View File

@ -61,6 +61,7 @@
gUefiCpuPkgTokenSpaceGuid.PcdCpuMicrocodePatchRegionSize ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApTargetCstate ## SOMETIMES_CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled ## CONSUMES
[Ppis]
gEdkiiPeiShadowMicrocodePpiGuid ## SOMETIMES_CONSUMES