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IntelSiliconPkg IntelVTdDxe: Use TPL to protect list/engine operation

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Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Star Zeng
2018-01-04 10:33:42 +08:00
parent dcd39e09ff
commit 3a71670618
4 changed files with 26 additions and 31 deletions
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19
IntelSiliconPkg/Feature/VTd/IntelVTdDxe/BmDma.c
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@@ -1,7 +1,7 @@
/** @file
BmDma related function
Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -12,15 +12,7 @@
**/
#include <PiDxe.h>
#include <Protocol/IoMmu.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "DmaProtection.h"
// TBD: May make it a policy
#define DMA_MEMORY_TOP MAX_UINTN
@@ -76,6 +68,7 @@ IoMmuMap (
MAP_INFO *MapInfo;
EFI_PHYSICAL_ADDRESS DmaMemoryTop;
BOOLEAN NeedRemap;
EFI_TPL OriginalTpl;
if (NumberOfBytes == NULL || DeviceAddress == NULL ||
Mapping == NULL) {
@@ -198,7 +191,9 @@ IoMmuMap (
MapInfo->DeviceAddress = MapInfo->HostAddress;
}
OriginalTpl = gBS->RaiseTPL (VTD_TPL_LEVEL);
InsertTailList (&gMaps, &MapInfo->Link);
gBS->RestoreTPL (OriginalTpl);
//
// The DeviceAddress is the address of the maped buffer below 4GB
@@ -233,6 +228,7 @@ IoMmuUnmap (
{
MAP_INFO *MapInfo;
LIST_ENTRY *Link;
EFI_TPL OriginalTpl;
DEBUG ((DEBUG_VERBOSE, "IoMmuUnmap: 0x%08x\n", Mapping));
@@ -241,6 +237,7 @@ IoMmuUnmap (
return EFI_INVALID_PARAMETER;
}
OriginalTpl = gBS->RaiseTPL (VTD_TPL_LEVEL);
MapInfo = NULL;
for (Link = GetFirstNode (&gMaps)
; !IsNull (&gMaps, Link)
@@ -255,10 +252,12 @@ IoMmuUnmap (
// Mapping is not a valid value returned by Map()
//
if (MapInfo != Mapping) {
gBS->RestoreTPL (OriginalTpl);
DEBUG ((DEBUG_ERROR, "IoMmuUnmap: %r\n", EFI_INVALID_PARAMETER));
return EFI_INVALID_PARAMETER;
}
RemoveEntryList (&MapInfo->Link);
gBS->RestoreTPL (OriginalTpl);
if (MapInfo->DeviceAddress != MapInfo->HostAddress) {
//