linux-kernel - Re: [PATCH v2 04/16] x86/mce/amd: Look up bank type by IPID

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Date: Tue, 23 Apr 2024 15:16:46 -0400
From: Yazen Ghannam <yazen.ghannam@....com>
To: Borislav Petkov <bp@...en8.de>
Cc: yazen.ghannam@....com, linux-edac@...r.kernel.org,
 linux-kernel@...r.kernel.org, tony.luck@...el.com, x86@...nel.org,
 Avadhut.Naik@....com, John.Allen@....com
Subject: Re: [PATCH v2 04/16] x86/mce/amd: Look up bank type by IPID

On 4/23/2024 1:06 PM, Borislav Petkov wrote:
> On Thu, Apr 04, 2024 at 10:13:47AM -0500, Yazen Ghannam wrote:
>> Scalable MCA systems use values within the MCA_IPID register to describe
>> a bank's type. Other information is not needed.
>>
>> Currently, the bank types are cached during boot and this information is
>> used during boot and run time. The cached values are per-CPU and
>> per-bank. The boot path needs the cached values, but this should be
>> removed. The run time path does not need the cached values.
>>
>> Determine a Scalable MCA bank's type using only the MCA_IPID values.
> 
> Lemme get this straight: You want to switch it all to use this new array
> smca_hwid_mcatypes[] to lookup HWIDs?
> 
> If so, where is the patch which removes the _old thing?
> 

It would be part of a follow up set.

Here's where it would finally be removed after a bunch of refactoring.

https://github.com/AMDESE/linux/commit/291c85ae22277

>>  arch/x86/include/asm/mce.h              |  4 +-
>>  arch/x86/kernel/cpu/mce/amd.c           | 99 ++++++++++++++++++++++---
>>  drivers/edac/amd64_edac.c               |  2 +-
>>  drivers/edac/mce_amd.c                  |  2 +-
>>  drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c |  2 +-
> 
> $ ./scripts/get_maintainer.pl -f drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> Alex Deucher <alexander.deucher@....com> (supporter:RADEON and AMDGPU DRM DRIVERS,commit_signer:91/89=100%)
> "Christian König" <christian.koenig@....com> (supporter:RADEON and AMDGPU DRM DRIVERS)
> "Pan, Xinhui" <Xinhui.Pan@....com> (supporter:RADEON and AMDGPU DRM DRIVERS)
> David Airlie <airlied@...il.com> (maintainer:DRM DRIVERS
> ...
> 
> You need to CC folks on changes touching their area...
> 

Yep, sorry I missed that. The same is true for the wrapper struct patches
later in the set. They touch all places with MCE notifiers.

Thanks,
Yazen