[v2] Fix ACPI Low Power Idle states for RD platforms

[edk2-devel] [edk2-platforms][PATCH V2 0/7] Fix ACPI Low Power Idle states for RD platforms

Posted by Pranav Madhu 1 year, 10 months ago

Changes since V1:
- Rebased on top of latest master branch.

The DSDT ACPI table used for Neoverse reference design platforms include
the _LPI control method for the kernel to enter idle states. This patch
series fixes bugs in the existing _LPI control method due to which
certain high level OS failed to boot on the supported Neoverse reference
design platforms. For each platform, the fixes include - clearing level
ID value as the platform supports only platform co-ordinated _LPI and
removing residency counter frequency as the platform does not implement
residency counter.

In addition to this, the RD-N2 and RD-N2-Cfg1 platforms are direct
connect platforms and so the _LPI control method for cluster is removed.

Link to github branch with the patches in this series -
https://github.com/Pranav-Madhu/edk2-platforms/tree/topics/lpi_fix_for_rd_platforms

Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Thomas Abraham <thomas.abraham@arm.com>

Pranav Madhu (7):
  Platform/Sgi: Fix ACPI Low Power Idle states for SGI575
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-N1-Edge
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-N1-Edge-X2
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-V1
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-V1-MC
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-N2
  Platform/Sgi: Fix ACPI Low Power Idle states for RD-N2-Cfg1

 Platform/ARM/SgiPkg/AcpiTables/RdN1Edge/Dsdt.asl   |  8 +-
 Platform/ARM/SgiPkg/AcpiTables/RdN1EdgeX2/Dsdt.asl |  8 +-
 Platform/ARM/SgiPkg/AcpiTables/RdN2/Dsdt.asl       | 78 +-------------------
 Platform/ARM/SgiPkg/AcpiTables/RdN2Cfg1/Dsdt.asl   | 54 +-------------
 Platform/ARM/SgiPkg/AcpiTables/RdV1/Dsdt.asl       |  8 +-
 Platform/ARM/SgiPkg/AcpiTables/RdV1Mc/Dsdt.asl     |  8 +-
 Platform/ARM/SgiPkg/AcpiTables/Sgi575/Dsdt.asl     |  8 +-
 7 files changed, 28 insertions(+), 144 deletions(-)

-- 
2.25.1



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Re: [edk2-devel] [edk2-platforms][PATCH V2 0/7] Fix ACPI Low Power Idle states for RD platforms

Posted by Ard Biesheuvel 1 year, 10 months ago

On Tue, 28 Jun 2022 at 20:20, Pranav Madhu <pranav.madhu@arm.com> wrote:
>
> Changes since V1:
> - Rebased on top of latest master branch.
>
> The DSDT ACPI table used for Neoverse reference design platforms include
> the _LPI control method for the kernel to enter idle states. This patch
> series fixes bugs in the existing _LPI control method due to which
> certain high level OS failed to boot on the supported Neoverse reference
> design platforms. For each platform, the fixes include - clearing level
> ID value as the platform supports only platform co-ordinated _LPI and
> removing residency counter frequency as the platform does not implement
> residency counter.
>
> In addition to this, the RD-N2 and RD-N2-Cfg1 platforms are direct
> connect platforms and so the _LPI control method for cluster is removed.
>
> Link to github branch with the patches in this series -
> https://github.com/Pranav-Madhu/edk2-platforms/tree/topics/lpi_fix_for_rd_platforms
>
> Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>
> Reviewed-by: Thomas Abraham <thomas.abraham@arm.com>
>
> Pranav Madhu (7):
>   Platform/Sgi: Fix ACPI Low Power Idle states for SGI575
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-N1-Edge
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-N1-Edge-X2
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-V1
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-V1-MC
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-N2
>   Platform/Sgi: Fix ACPI Low Power Idle states for RD-N2-Cfg1
>

Pushed as 8e067b431294..923ef6c8c862

Thanks,


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