diff options
Diffstat (limited to 'SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c')
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c index 76123fc..5addd2f 100644 --- a/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c +++ b/SecurityPkg/Tcg/Tcg2Acpi/Tcg2Acpi.c @@ -9,7 +9,7 @@ This driver will have external input - variable and ACPINvs data in SMM mode.
This external input must be validated carefully to avoid security issue.
-Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2024, Intel Corporation. All rights reserved.<BR>
Copyright (c) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -22,6 +22,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Guid/TpmInstance.h>
#include <Guid/TpmNvsMm.h>
#include <Guid/PiSmmCommunicationRegionTable.h>
+#include <Guid/Tcg2AcpiCommunicateBuffer.h>
#include <Protocol/AcpiTable.h>
#include <Protocol/Tcg2Protocol.h>
@@ -38,7 +39,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent #include <Library/Tpm2DeviceLib.h>
#include <Library/Tpm2CommandLib.h>
#include <Library/UefiLib.h>
-#include <Library/MmUnblockMemoryLib.h>
+#include <Library/HobLib.h>
//
// Physical Presence Interface Version supported by Platform
@@ -116,7 +117,7 @@ TCG_NVS *mTcgNvs; @param[in] Name The name string to find in TPM table.
@param[in] Size The size of the region to find.
- @return The allocated address for the found region.
+ @return The Acpi Communicate Buffer for the found region.
**/
VOID *
@@ -126,9 +127,10 @@ AssignOpRegion ( UINT16 Size
)
{
- EFI_STATUS Status;
- AML_OP_REGION_32_8 *OpRegion;
- EFI_PHYSICAL_ADDRESS MemoryAddress;
+ AML_OP_REGION_32_8 *OpRegion;
+ EFI_PHYSICAL_ADDRESS MemoryAddress;
+ EFI_HOB_GUID_TYPE *GuidHob;
+ TCG2_ACPI_COMMUNICATE_BUFFER *Tcg2AcpiCommunicateBufferHob;
MemoryAddress = SIZE_4GB - 1;
@@ -144,16 +146,16 @@ AssignOpRegion ( (OpRegion->DWordPrefix == AML_DWORD_PREFIX) &&
(OpRegion->BytePrefix == AML_BYTE_PREFIX))
{
- Status = gBS->AllocatePages (AllocateMaxAddress, EfiACPIMemoryNVS, EFI_SIZE_TO_PAGES (Size), &MemoryAddress);
- ASSERT_EFI_ERROR (Status);
+ GuidHob = GetFirstGuidHob (&gEdkiiTcg2AcpiCommunicateBufferHobGuid);
+ ASSERT (GuidHob != NULL);
+ Tcg2AcpiCommunicateBufferHob = GET_GUID_HOB_DATA (GuidHob);
+ MemoryAddress = Tcg2AcpiCommunicateBufferHob->Tcg2AcpiCommunicateBuffer;
+ ASSERT (MemoryAddress != 0);
+ ASSERT (EFI_PAGES_TO_SIZE (Tcg2AcpiCommunicateBufferHob->Pages) >= Size);
+
ZeroMem ((VOID *)(UINTN)MemoryAddress, Size);
OpRegion->RegionOffset = (UINT32)(UINTN)MemoryAddress;
OpRegion->RegionLen = (UINT8)Size;
- // Request to unblock this region from MM core
- Status = MmUnblockMemoryRequest (MemoryAddress, EFI_SIZE_TO_PAGES (Size));
- if ((Status != EFI_UNSUPPORTED) && EFI_ERROR (Status)) {
- ASSERT_EFI_ERROR (Status);
- }
break;
}
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