This patch adds a platform PEIM for FIT based shadow microcode PPI support. A detailed design doc can be found here: https://edk2.groups.io/g/devel/files/Designs/2020/0214/Support%20 the%202nd%20Microcode%20FV%20Flash%20Region.pdf
TEST: Tested on FIT enabled platform. BZ: https://tianocore.acgmultimedia.com/show_bug.cgi?id=2449 Cc: Ray Ni <ray...@intel.com> Cc: Rangasai V Chaganty <rangasai.v.chaga...@intel.com> Signed-off-by: Siyuan Fu <siyuan...@intel.com> --- .../Feature/ShadowMicrocode/ShadowMicrocodePei.c | 4 ++++ .../Feature/ShadowMicrocode/ShadowMicrocodePei.inf | 3 +++ Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec | 7 +++++++ 3 files changed, 14 insertions(+) diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c index 0ad3eeaa07..f160f59b87 100644 --- a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c +++ b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.c @@ -248,6 +248,10 @@ ShadowMicrocodePatchByFit ( UINTN TotalSize; UINTN TotalLoadSize; + if (!FeaturePcdGet (PcdCpuShadowMicrocodeByFit)) { + return EFI_UNSUPPORTED; + } + FitPointer = *(UINT64 *) (UINTN) FIT_POINTER_ADDRESS; if ((FitPointer == 0) || (FitPointer == 0xFFFFFFFFFFFFFFFF) || diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf index 27d07ac56c..fecb7c3904 100644 --- a/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf +++ b/Silicon/Intel/IntelSiliconPkg/Feature/ShadowMicrocode/ShadowMicrocodePei.inf @@ -39,5 +39,8 @@ gEdkiiMicrocodeShadowInfoHobGuid gEdkiiMicrocodeStorageTypeFlashGuid +[Pcd] + gIntelSiliconPkgTokenSpaceGuid.PcdCpuShadowMicrocodeByFit + [Depex] TRUE diff --git a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec index 2d8e40f0b8..ad093928b7 100644 --- a/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec +++ b/Silicon/Intel/IntelSiliconPkg/IntelSiliconPkg.dec @@ -64,6 +64,13 @@ # Include/Protocol/PlatformDeviceSecurityPolicy.h gEdkiiDeviceSecurityPolicyProtocolGuid = {0x7ea41a99, 0x5e32, 0x4c97, {0x88, 0xc4, 0xd6, 0xe7, 0x46, 0x84, 0x9, 0xd4}} +[PcdsFeatureFlag] + ## Indicates if FIT based microcode shadowing will be enabled.<BR><BR> + # TRUE - FIT base microcode shadowing will be enabled.<BR> + # FALSE - FIT base microcode shadowing will be disabled.<BR> + # @Prompt FIT based microcode shadowing. + gIntelSiliconPkgTokenSpaceGuid.PcdCpuShadowMicrocodeByFit|FALSE|BOOLEAN|0x00000006 + [PcdsFixedAtBuild, PcdsPatchableInModule] ## Error code for VTd error.<BR><BR> # EDKII_ERROR_CODE_VTD_ERROR = (EFI_IO_BUS_UNSPECIFIED | (EFI_OEM_SPECIFIC | 0x00000000)) = 0x02008000<BR> -- 2.19.1.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#54132): https://edk2.groups.io/g/devel/message/54132 Mute This Topic: https://groups.io/mt/71134364/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
