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ArmPkg: StandaloneMmCpu: Add MM communicate v3 support

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As the standalone MM core begins supporting MM Communicate v3, this
update extends its functionality to incorporate MM Communicate v3 headers
format, enabling compatibility with the new protocol.

Signed-off-by: Kun Qin <kun.qin@microsoft.com>
This commit is contained in:
Kun Qin
2025-05-14 13:22:26 -07:00
committed by mergify[bot]
parent 6b7a3e05f0
commit 9752e69927
2 changed files with 50 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
ArmPkg/Drivers/StandaloneMmCpu/EventHandle.c
View File

@ -40,6 +40,7 @@ MmFoundationEntryRegister (
// (which means it cannot run concurrently)
//
EFI_MM_COMMUNICATE_HEADER *gGuidedEventContext = NULL;
EFI_MM_COMMUNICATE_HEADER_V3 *gGuidedEventContextV3 = NULL;
EFI_MM_CONFIGURATION_PROTOCOL mMmConfig = {
0,
@ -88,9 +89,20 @@ PiMmStandaloneMmCpuDriverEntry (
return EFI_UNSUPPORTED;
}
// Find out the size of the buffer passed
if (CompareGuid (
&((EFI_MM_COMMUNICATE_HEADER *)CommBufferAddr)->HeaderGuid,
&gEfiMmCommunicateHeaderV3Guid
))
{
// This is a v3 header
CommBufferSize = ((EFI_MM_COMMUNICATE_HEADER_V3 *)CommBufferAddr)->BufferSize;
} else {
// This is a v1 header
// Find out the size of the buffer passed
CommBufferSize = ((EFI_MM_COMMUNICATE_HEADER *)CommBufferAddr)->MessageLength +
sizeof (EFI_MM_COMMUNICATE_HEADER);
OFFSET_OF (EFI_MM_COMMUNICATE_HEADER, Data);
}
// Now that the secure world can see the normal world buffer, allocate
// memory to copy the communication buffer to the secure world.
@ -188,6 +200,27 @@ PiMmCpuTpFwRootMmiHandler (
return EFI_NOT_FOUND;
}
if (CompareGuid (
&gGuidedEventContext->HeaderGuid,
&gEfiMmCommunicateHeaderV3Guid
))
{
gGuidedEventContextV3 = (EFI_MM_COMMUNICATE_HEADER_V3 *)gGuidedEventContext;
DEBUG ((
DEBUG_INFO,
"CommBuffer - 0x%x, CommBufferSize - 0x%llx, MessageSize - 0x%llx\n",
gGuidedEventContextV3,
gGuidedEventContextV3->BufferSize,
gGuidedEventContextV3->MessageSize
));
Status = mMmst->MmiManage (
&gGuidedEventContextV3->MessageGuid,
NULL,
gGuidedEventContextV3->MessageData,
(UINTN *)(&gGuidedEventContextV3->MessageSize)
);
} else {
DEBUG ((
DEBUG_INFO,
"CommBuffer - 0x%x, CommBufferSize - 0x%x\n",
@ -199,8 +232,9 @@ PiMmCpuTpFwRootMmiHandler (
&gGuidedEventContext->HeaderGuid,
NULL,
gGuidedEventContext->Data,
&gGuidedEventContext->MessageLength
(UINTN *)(&gGuidedEventContext->MessageLength)
);
}
if (Status != EFI_SUCCESS) {
DEBUG ((DEBUG_WARN, "Unable to manage Guided Event - %d\n", Status));

1
ArmPkg/Drivers/StandaloneMmCpu/StandaloneMmCpu.inf
View File

@ -46,6 +46,7 @@
gZeroGuid
gMpInformationHobGuid
gEfiStandaloneMmNonSecureBufferGuid
gEfiMmCommunicateHeaderV3Guid
[Depex]
TRUE