The existing MpInitLib will shadow the microcode update patches from flash to memory and this is done by searching microcode region specified by PCD PcdCpuMicrocodePatchAddress and PcdCpuMicrocodePatchRegionSize. This brings a limition to platform FW that all the microcode patches must be placed in one continuous flash space.
This patch set shadows microcode update according to FIT microcode entries if it's present, otherwise it will fallback to original logic (by PCD). Patch 1/2: Add FIT header file to MdePkg. Patch 2/2: Update microcode loader to shadow microcode according to FIT. Cc: Michael D Kinney <michael.d.kin...@intel.com> Cc: Liming Gao <liming....@intel.com> Cc: Eric Dong <eric.d...@intel.com> Cc: Ray Ni <ray...@intel.com> Cc: Laszlo Ersek <ler...@redhat.com> Siyuan Fu (2): MdePkg: Add header file for Firmware Interface Table specification. UefiCpuPkg: Shadow microcode patch according to FIT microcode entry. .../IndustryStandard/FirmwareInterfaceTable.h | 76 ++++++ UefiCpuPkg/Library/MpInitLib/Microcode.c | 255 +++++++++++++----- UefiCpuPkg/Library/MpInitLib/MpLib.c | 4 +- UefiCpuPkg/Library/MpInitLib/MpLib.h | 7 +- 4 files changed, 276 insertions(+), 66 deletions(-) create mode 100644 MdePkg/Include/IndustryStandard/FirmwareInterfaceTable.h -- 2.19.1.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#52998): https://edk2.groups.io/g/devel/message/52998 Mute This Topic: https://groups.io/mt/69521538/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
