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UefiCpuPkg: Remove alignment check when calculate microcode size.

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This patch removes the unnecessary alignment check on microcode patch
TotalSize introduced by commit d786a172. The TotalSize has already been
checked with 1K alignment and MAX_ADDRESS in previous code as below:

    if ( (UINTN)MicrocodeEntryPoint > (MAX_ADDRESS - TotalSize) ||
         ((UINTN)MicrocodeEntryPoint + TotalSize) > MicrocodeEnd ||
         (DataSize & 0x3) != 0 ||
         (TotalSize & (SIZE_1KB - 1)) != 0 ||
         TotalSize < DataSize
       ) {

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Siyuan Fu 2020-01-03 15:11:51 +08:00 committed by mergify[bot]
parent 70911f1f4a
commit 08a475df10
2 changed files with 6 additions and 21 deletions
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24
UefiCpuPkg/Library/MpInitLib/Microcode.c
View File

@ -1,7 +1,7 @@
/** @file
Implementation of loading microcode on processors.
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -397,16 +397,7 @@ LoadMicrocodePatchWorker (
Patches[Index].Size
);
//
// Zero-fill the padding area
// Please note that AlignedSize will be no less than Size
//
ZeroMem (
Walker + Patches[Index].Size,
Patches[Index].AlignedSize - Patches[Index].Size
);
Walker += Patches[Index].AlignedSize;
Walker += Patches[Index].Size;
}
//
@ -578,14 +569,9 @@ LoadMicrocodePatch (
//
// Store the information of this microcode patch
//
if (TotalSize > ALIGN_VALUE (TotalSize, SIZE_1KB) ||
ALIGN_VALUE (TotalSize, SIZE_1KB) > MAX_UINTN - TotalLoadSize) {
goto OnExit;
}
PatchInfoBuffer[PatchCount - 1].Address = (UINTN) MicrocodeEntryPoint;
PatchInfoBuffer[PatchCount - 1].Size = TotalSize;
PatchInfoBuffer[PatchCount - 1].AlignedSize = ALIGN_VALUE (TotalSize, SIZE_1KB);
TotalLoadSize += PatchInfoBuffer[PatchCount - 1].AlignedSize;
PatchInfoBuffer[PatchCount - 1].Address = (UINTN) MicrocodeEntryPoint;
PatchInfoBuffer[PatchCount - 1].Size = TotalSize;
TotalLoadSize += TotalSize;
}
//

3
UefiCpuPkg/Library/MpInitLib/MpLib.h
View File

@ -1,7 +1,7 @@
/** @file
Common header file for MP Initialize Library.
Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2020, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -54,7 +54,6 @@
typedef struct {
UINTN Address;
UINTN Size;
UINTN AlignedSize;
} MICROCODE_PATCH_INFO;
//