[edk2-devel] [PATCH v1 0/2] Support MM based variable services in PEI for ARM

[Kun Qin]

Hi Arm and MdeModule package maintainers,

This patch series has been sent out for almost 2 weeks without any reviews.

Could you please provide feedback on the change when you have a chance?
Any input is appreciated.

Regards,
Kun

On 6/8/2023 1:44 PM, Kun Qin via groups.io wrote:
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4464
>
> As of today, there has been a void in the variable service in PEI phase
> on ARM systems that support PEI phase and standalone MM hosted variable
> service.
>
> This change adds the support through:
> 1. Add MM communication services in PEI phase for ARM platforms. This
> module is based on SMC calls to standalone MM environments, similar to
> "ArmPkg/Drivers/MmCommunicationDxe".
>
> 2. A service module that installs `gEfiPeiReadOnlyVariable2PpiGuid` based
> on step 1. Note that this driver will not have special dependency on ARM
> specific code, thus will be ideally added to MdeModulePkg.
>
> Patch v1 branch: https://github.com/kuqin12/edk2/tree/arm_var_pei_v1
>
> Cc: Hao A Wu <hao.a.wu at intel.com>
> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> Cc: Jian J Wang <jian.j.wang at intel.com>
> Cc: Leif Lindholm <quic_llindhol at quicinc.com>
> Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
> Cc: Sami Mujawar <sami.mujawar at arm.com>
>
> Kun Qin (2):
>    ArmPkg: MmCommunicationPei: Introduce MM communicate in PEI
>    MdeModulePkg: Variable: Introduce MM based variable read service in
>      PEI
>
>   ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.c          | 178 +++++++++
>   MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.c   | 381 ++++++++++++++++++++
>   ArmPkg/ArmPkg.dsc                                               |   2 +
>   ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.h          |  76 ++++
>   ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.inf        |  41 +++
>   MdeModulePkg/MdeModulePkg.dsc                                   |   1 +
>   MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.h   | 134 +++++++
>   MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.inf |  43 +++
>   8 files changed, 856 insertions(+)
>   create mode 100644 ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.c
>   create mode 100644 MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.c
>   create mode 100644 ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.h
>   create mode 100644 ArmPkg/Drivers/MmCommunicationPei/MmCommunicationPei.inf
>   create mode 100644 MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.h
>   create mode 100644 MdeModulePkg/Universal/Variable/MmVariablePei/MmVariablePei.inf
>


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