tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

UefiCpuPkg/CpuMp: Fix hang when StackGuard is enabled in 16-core cpu 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3167

When StackGuard is enabled, the CpuMp driver allocates
known good stacks for all CPUs for DF# and PF# exceptions.
It uses AllocatePool to do so.

The size needed equals to 64KB
= StackSize (2K) * ExceptionNumber (2) * NumberOfProcessors (16)

However, AllocatePool max allocation size is less than 64K.
To fix the issue, AllocatePages() is used.

Signed-off-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
This commit is contained in:
Ray Ni 2021-01-22 10:45:02 +08:00 committed by mergify[bot]
parent 6c5801be6e
commit 3b769c5110
3 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
UefiCpuPkg/CpuMpPei/CpuMpPei.c
View File

@ -1,7 +1,7 @@
/** @file
CPU PEI Module installs CPU Multiple Processor PPI.
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -532,13 +532,9 @@ InitializeMpExceptionStackSwitchHandlers (
ExceptionNumber = FixedPcdGetSize (PcdCpuStackSwitchExceptionList);
NewStackSize = FixedPcdGet32 (PcdCpuKnownGoodStackSize) * ExceptionNumber;
Status = PeiServicesAllocatePool (
NewStackSize * NumberOfProcessors,
(VOID **)&StackTop
);
StackTop = AllocatePages (EFI_SIZE_TO_PAGES (NewStackSize * NumberOfProcessors));
ASSERT(StackTop != NULL);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
if (StackTop == NULL) {
return;
}
StackTop += NewStackSize * NumberOfProcessors;

3
UefiCpuPkg/CpuMpPei/CpuMpPei.h
View File

@ -1,7 +1,7 @@
/** @file
Definitions to install Multiple Processor PPI.
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -27,6 +27,7 @@
#include <Library/CpuExceptionHandlerLib.h>
#include <Library/MpInitLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
extern EFI_PEI_PPI_DESCRIPTOR mPeiCpuMpPpiDesc;

3
UefiCpuPkg/CpuMpPei/CpuMpPei.inf
View File

@ -1,7 +1,7 @@
## @file
# CPU driver installs CPU PI Multi-processor PPI.
#
# Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
# Copyright (c) 2015 - 2021, Intel Corporation. All rights reserved.<BR>
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
##
@ -45,6 +45,7 @@
MpInitLib
BaseMemoryLib
CpuLib
MemoryAllocationLib
[Guids]
gEdkiiMigratedFvInfoGuid ## SOMETIMES_CONSUMES ## HOB