[edk2-devel] [PATCH 0/6] PIWG M1993 - implement EFI_MM_COMMUNICATE2_PROTOCOL
Liming Gao via Groups.Io
liming.gao=intel.com at groups.io
Mon Nov 25 14:21:14 UTC 2019
Ard:
This change is about new protocol in 1.7 errata A of the PI spec. But, PI 1.7 errata A is not published yet. So, this patch set is for edk2-staging first?
I review the code logic. For SMM part, SmmIpl still installs current SmmCommunication protocol. So, this change is totally compatible. Right?
Thanks
Liming
> -----Original Message-----
> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Ard Biesheuvel
> Sent: Friday, November 22, 2019 4:32 PM
> To: devel at edk2.groups.io
> Cc: leif.lindholm at linaro.org; Ard Biesheuvel <ard.biesheuvel at linaro.org>; piwg at uefi.org; kimon.berlin at hp.com; eugene at hp.com
> Subject: [edk2-devel] [PATCH 0/6] PIWG M1993 - implement EFI_MM_COMMUNICATE2_PROTOCOL
>
> 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: piwg at uefi.org
> Cc: kimon.berlin at hp.com
> Cc: eugene at 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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