hi Sami,

On Mon, 22 Feb 2021 at 19:40, Ard Biesheuvel <ardb@kernel.org> wrote:

> On Fri, 19 Feb 2021 at 07:36, Sughosh Ganu <sughosh.ganu@linaro.org>
> wrote:
> >
> > The following patch series adds support for using the Firmware
> > Framework(FF-A) as a transport mechanism for requesting services from
> > the Secure Partition Manager(SPM). This is done through a Pcd which
> > can be used to enable the FF-A mechanism or to use the earlier used
> > SVC calls.
> >
> > The patches have been pushed to my github repository[1]
> >
> > Ran the CI tests through the github draft pull request, and all the CI
> > test pass. Ran the PatchCheck script, with no errors.
> >
> > Changes since V4:
> > * Define all variable Pcd's under the [Pcd] section instead of
> >   [FixedPcd], as suggested by Liming Gao
> >
> > Changes since V3:
> > * Put the PcdFfaEnable under the PcdsFeatureFlag.AARCH64 section to
> >   avoid build breakage for the X64 StandaloneMm builds.
> > * Put the macro definitions for the SPM major and minor versions in a
> >   separate patch, as suggested by Sami.
> > * Separated out the declaration of the SPM major and minor version
> >   macros in the earlier patch as was suggested by Sami.
> > * Put the macro definitions for the SPM major and minor versions with
> >   FF-A support in a separate patch, as suggested by Sami.
> > * Declare the PcdFfaEnable Pcd Feature flag under FeaturePcd.AARCH64
> >   to avoid build break for the X64 build of StandaloneMm.
> > * Change the patch header to have the ArmPkg prefix instead of
> >   StandaloneMmMmuLib as suggested by Sami.
> >
> > Changes since V2:
> > * Added a STATIC storage class specifier for mSpmMajorVer and
> >   mSpmMinorVer variables
> > * Added a STATIC storage class specifier for mSpmMajorVerFfa and
> >   mSpmMinorVerFfa variables
> > * Add braces for if/else statements
> > * Add a check for EFI_NOT_FOUND as a possible return value from
> >   LocateStandaloneMmCorePeCoffData in _ModuleEntryPoint function
> > * Check for the return value in Arg0 after the Direct Request call to
> >   handle errors returned
> > * Put a comment to reflect the fact that FFA_INTERRUPT and FFA_SUCCESS
> >   response won't be expected in return to a Direct Request call to get
> >   the memory attributes
> > * Check for the return value in Arg0 after the Direct Request call to
> >   handle errors returned
> > * Put a comment to reflect the fact that FFA_INTERRUPT and FFA_SUCCESS
> >   response won't be expected in return to a Direct Request call to set
> >   the memory attributes
> >
> > Changes since V1:
> > Handled review comments from Sami Mujawar
> >
> > [1] -
> https://github.com/sughoshg/edk2/tree/implement_ffa_svc_optional_v5
> >
> >
> > Achin Gupta (7):
> >   ArmPkg/IndustryStandard: Add barebones FF-A header
> >   ArmPkg/ArmSvcLib: Return x4-x7 in output parameters
> >   StandaloneMmPkg: Use FF-A header file in Standalone MM Core entry
> >     point
> >   StandaloneMmPkg: Add option to use FF-A calls for communication with
> >     SPM
> >   ArmPkg: Use FF-A header file in Standalone MM Arm MMU library
> >   ArmPkg: Allow FF-A calls to get memory region's attributes
> >   ArmPkg: Allow FF-A calls to set memory region's attributes
> >
> > Ilias Apalodimas (2):
> >   MdeModulePkg/VariableStandaloneMm: Set PcdFlashNvStorageVariableBase
> >     to Pcd
> >   StandaloneMmPkg: Allow sending FFA Direct Request message to
> >     StandaloneMm
> >
> > Sughosh Ganu (5):
> >   ArmPkg: Introduce support for PcdFfaEnable
> >   ArmPkg: Add macros for SPM version
> >   StandaloneMmPkg: Use macros for SPM version check
> >   ArmPkg: Add macros for SPM version with FF-A support enabled
> >   StandaloneMmPkg: Add option to use FF-A calls for getting SPM version
> >
>
> Unfortunately, I won't be able to do a detailed review of this series,
> but I have discussed these patches before with Sami off-list, and
> based on that and on my earlier review of v3:
>
> Acked-by: Ard Biesheuvel <ardb@kernel.org>
>
> for the series, where necessary.
>

Can you please merge this patch series for the stable tag
edk2-stable202102. I have created a bugzilla ticket for this feature
addition[1]. Please let me know if anything else is needed. Thanks.

-sughosh

[1] - https://bugzilla.tianocore.org/show_bug.cgi?id=3230