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MdeModulePkg/SmmCommunicationBufferDxe: Re-use FixedCommBuffer

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SmmCommunicationBufferDxe need to re-use FixedCommBuffer from
MmCommBuffer HOB which created under PEI stage.

Signed-off-by: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Jiaxin Wu <jiaxin.wu@intel.com>
This commit is contained in:
Zhang Hongbin 2024-05-30 17:59:50 +08:00 committed by mergify[bot]
parent d64766bde6
commit 82d2f6b3c3
2 changed files with 20 additions and 4 deletions
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23
MdeModulePkg/Universal/SmmCommunicationBufferDxe/SmmCommunicationBufferDxe.c
View File

@ -19,7 +19,9 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/UefiLib.h>
#include <Guid/MmCommBuffer.h>
#include <Guid/PiSmmCommunicationRegionTable.h>
#define DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES 4
@ -44,8 +46,11 @@ SmmCommunicationBufferEntryPoint (
UINT32 DescriptorSize;
EDKII_PI_SMM_COMMUNICATION_REGION_TABLE *PiSmmCommunicationRegionTable;
EFI_MEMORY_DESCRIPTOR *Entry;
EFI_HOB_GUID_TYPE *GuidHob;
MM_COMM_BUFFER *MmCommBuffer;
DescriptorSize = sizeof (EFI_MEMORY_DESCRIPTOR);
//
// Make sure Size != sizeof(EFI_MEMORY_DESCRIPTOR). This will
// prevent people from having pointer math bugs in their code.
@ -65,11 +70,21 @@ SmmCommunicationBufferEntryPoint (
PiSmmCommunicationRegionTable->DescriptorSize = DescriptorSize;
Entry = (EFI_MEMORY_DESCRIPTOR *)(PiSmmCommunicationRegionTable + 1);
Entry->Type = EfiConventionalMemory;
Entry->PhysicalStart = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateReservedPages (DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES);
GuidHob = GetFirstGuidHob (&gMmCommBufferHobGuid);
if (GuidHob == NULL) {
Entry->PhysicalStart = (EFI_PHYSICAL_ADDRESS)(UINTN)AllocateReservedPages (DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES);
Entry->NumberOfPages = DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES;
} else {
MmCommBuffer = GET_GUID_HOB_DATA (GuidHob);
Entry->PhysicalStart = MmCommBuffer->PhysicalStart;
Entry->NumberOfPages = MmCommBuffer->NumberOfPages;
}
ASSERT (Entry->PhysicalStart != 0);
Entry->VirtualStart = 0;
Entry->NumberOfPages = DEFAULT_COMMON_PI_SMM_COMMUNIATION_REGION_PAGES;
Entry->Attribute = 0;
Entry->VirtualStart = 0;
Entry->Attribute = 0;
DEBUG ((DEBUG_INFO, "PiSmmCommunicationRegionTable:(0x%x)\n", PiSmmCommunicationRegionTable));
DEBUG ((DEBUG_INFO, " Version - 0x%x\n", PiSmmCommunicationRegionTable->Version));

1
MdeModulePkg/Universal/SmmCommunicationBufferDxe/SmmCommunicationBufferDxe.inf
View File

@ -47,6 +47,7 @@
[Guids]
gEdkiiPiSmmCommunicationRegionTableGuid ## PRODUCES ## SystemTable
gMmCommBufferHobGuid ## CONSUMES
[Depex]
TRUE