253909974a
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2430 This commit will add the definitions for EDKII microcode patch HOB. The intention of adding this HOB is to provide a scheme to store the below information: A. The base address and size of the microcode patches that are being loaded (from flash) into memory; B. The information of detected microcode patch for each processor within the system. The producer of the HOB will be the UefiCpuPkg/MpInitLib (where the load, detect and apply of the microcode happen). The consumer of the HOB can be modules that want to detect/apply the microcode patch by themselves again later during the boot flow. Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Hao A Wu <hao.a.wu@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/** @file
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The microcode patch HOB is used to store the information of:
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A. Base address and size of the loaded microcode patches data;
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B. Detected microcode patch for each processor within system.
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Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _MICROCODE_PATCH_HOB_H_
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#define _MICROCODE_PATCH_HOB_H_
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extern EFI_GUID gEdkiiMicrocodePatchHobGuid;
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//
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// The EDKII microcode patch HOB will be produced by MpInitLib and it can be
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// consumed by modules that want to detect/apply microcode patches.
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//
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typedef struct {
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//
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// The base address of the microcode patches data after being loaded into
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// memory.
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//
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UINT64 MicrocodePatchAddress;
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//
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// The total size of the loaded microcode patches.
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//
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UINT64 MicrocodePatchRegionSize;
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//
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// The number of processors within the system.
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//
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UINT32 ProcessorCount;
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//
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// An array with 'ProcessorCount' elements that stores the offset (with
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// regard to 'MicrocodePatchAddress') of the detected microcode patch
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// (including the CPU_MICROCODE_HEADER data structure) for each processor.
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// If no microcode patch is detected for certain processor, the relating
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// element will be set to MAX_UINT64.
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//
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UINT64 ProcessorSpecificPatchOffset[0];
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} EDKII_MICROCODE_PATCH_HOB;
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#endif
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