As discussed in the PIWG call on 21 November, I am sending out my
implementation of the MM communicate 2 protocol for review. It is
intended to work around the impedance mismatch between traditional
SMM (which uses physical addresses in the communication between DXE
components) and standalone MM (which uses virtual addresses)
The solution presented here is to introduce a new protocol that takes
both addresses, forcing the clients to pass both, but freeing them
from the responsibility to reason about which kind of address to pass:
this becomes the responsibility of the MM_COMMUNICATE implementation,
which is where it belongs.
Cc: p...@uefi.org
Cc: kimon.ber...@hp.com
Cc: eug...@hp.com
Ard Biesheuvel (6):
MdePkg: introduce MM communicate 2 protocol
MdeModulePkg/SmmIpl: expose MM communicate 2 protocol
ArmPkg/MmCommunicationDxe: expose MM Communicate 2 protocol
MdeModulePkg/VariableInfo: switch to MM communicate 2 protocol
MdeModulePkg/FaultTolerantWriteSmmDxe: switch to MM communicate 2
protocol
MdeModulePkg/VariableSmmRuntimeDxe: switch to MM communicate 2
protocol
ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.c |
83 +++++++++-----------
ArmPkg/Drivers/MmCommunicationDxe/MmCommunication.inf |
6 +-
MdeModulePkg/Application/VariableInfo/VariableInfo.c |
19 +++--
MdeModulePkg/Application/VariableInfo/VariableInfo.inf |
2 +-
MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c |
79 +++++++++++++++++++
MdeModulePkg/Core/PiSmmCore/PiSmmIpl.inf |
1 +
MdeModulePkg/Include/Guid/SmmVariableCommon.h |
6 +-
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmCommon.h |
2 +-
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.c |
25 +++---
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.h |
2 +-
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmmDxe.inf |
4 +-
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.c |
39 ++++-----
MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmRuntimeDxe.inf |
4 +-
MdePkg/Include/Protocol/MmCommunication2.h |
69 ++++++++++++++++
MdePkg/MdePkg.dec |
7 ++
15 files changed, 254 insertions(+), 94 deletions(-)
create mode 100644 MdePkg/Include/Protocol/MmCommunication2.h
--
2.20.1
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