[PATCH v2 6/6] MdePkg: MmCommunication: Extend MessageLength field size to UINT64

Kun Qin

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3398
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3430

The MessageLength field of EFI_MM_COMMUNICATE_HEADER, as a generic
definition, could be used for both PEI and DXE MM communication. On a
system that supports PEI MM launch, but operates PEI in 32bit mode and MM
foundation in 64bit, the current EFI_MM_COMMUNICATE_HEADER definition
will cause structure parse error due to UINTN used.

This change removes the architecture dependent field by extending this
field definition as UINT64.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

Signed-off-by: Kun Qin <kuqin12@gmail.com>

- Removed comments with "BZ"

MdePkg/Include/Protocol/MmCommunication.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MdePkg/Include/Protocol/MmCommunication.h b/MdePkg/Include/Protocol/MmCommunication.h
index 34c3e2b5a9e3..d42b00bbeb7c 100644
--- a/MdePkg/Include/Protocol/MmCommunication.h
+++ b/MdePkg/Include/Protocol/MmCommunication.h
@@ -26,7 +26,7 @@ typedef struct {
/// Describes the size of Data (in bytes) and does not include the size of the header.
- UINTN MessageLength;
+ UINT64 MessageLength;
/// Designates an array of bytes that is MessageLength in size.