[edk2-devel] [edk2-platforms][PATCH V1 0/7] Fix ACPI Low Power Idle states for RD platforms

[PierreGondois]

Hello Pranav,
Would it be possible to extend this change to the Juno aswell as the
platform has a Null Residency Counter and doesn't support OS Initiated LPI ?

Another remark is that for RdV1MC, RdN2, RdV1 and RdN2Cfg1 platforms,
CPUs don't need to be encapsulated anymore in cluster objects
Cf:
Device (CL00) {   // Cluster 0
   Name (_HID, "ACPI0010")
   Name (_UID, 0)
   ...
}
since Clusters don't have any additional information. But keeping them
is correct aswell.

Regards,
Pierre

On 6/20/22 18:53, Pranav Madhu via groups.io wrote:
> Hi All,
> 
> Could you please let me know if any updates required for this series of patch?
> 
> Regards,
> Pranav
> 
> *From:* Thomas Abraham <thomas.abraham at arm.com>
> *Sent:* Sunday, June 12, 2022 2:16 AM
> *To:* Pranav Madhu <Pranav.Madhu at arm.com>; devel at edk2.groups.io
> *Subject:* Re: [edk2-devel] [edk2-platforms][PATCH V1 0/7] Fix ACPI Low Power Idle states for RD platforms
> 
> On Thu, Jun 9, 2022 at 11:20 AM, Pranav Madhu wrote:
> 
>     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= <https://github.com/Pranav-Madhu/edk2-platforms/tree/topics/lpi_fix_for_rd=>
>     _platforms
> 
>     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(-)
> 
> 
> For this series -
> Reviewed-by: Thomas Abraham <thomas.abraham at arm.com <mailto:thomas.abraham at arm.com>>
> 
> 


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