linux-kernel - Re: [PATCH RESEND 0/5] Fix UPI uncore issue on SPR

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Message-ID: <81c169dd-1b8a-b324-c845-4edb97295884@linux.intel.com>
Date:   Thu, 19 Jan 2023 17:03:37 -0500
From:   "Liang, Kan" <kan.liang@...ux.intel.com>
To:     peterz@...radead.org, mingo@...hat.com,
        linux-kernel@...r.kernel.org
Cc:     steve.wahl@....com, alexander.antonov@...ux.intel.com,
        ak@...ux.intel.com, eranian@...gle.com, namhyung@...nel.org,
        Michael Petlan <mpetlan@...hat.com>
Subject: Re: [PATCH RESEND 0/5] Fix UPI uncore issue on SPR

Hi Peter & Ingo,

Gentle Ping. Please let me know if you have any comments on the patch set.

Thanks
Kan

On 2023-01-12 3:01 p.m., kan.liang@...ux.intel.com wrote:
> From: Kan Liang <kan.liang@...ux.intel.com>
> 
> The discovery table of UPI on SPR MCC is broken. The patch series is
> to mitigate the issue by providing a hardcode pre-defined table.
> 
> The broken discovery table can trigger a kernel warning message, which
> is overkilled. The patch series also refine the error handling code.
> 
> Kan Liang (5):
>   perf/x86/uncore: Factor out uncore_device_to_die()
>   perf/x86/uncore: Fix potential NULL pointer in uncore_get_alias_name
>   perf/x86/uncore: Ignore broken units in discovery table
>   perf/x86/uncore: Add a quirk for UPI on SPR
>   perf/x86/uncore: Don't WARN_ON_ONCE() for a broken discovery table
> 
>  arch/x86/events/intel/uncore.c           |  34 ++++-
>  arch/x86/events/intel/uncore.h           |   4 +
>  arch/x86/events/intel/uncore_discovery.c |  60 ++++++---
>  arch/x86/events/intel/uncore_discovery.h |  14 +-
>  arch/x86/events/intel/uncore_snbep.c     | 158 ++++++++++++++++++-----
>  5 files changed, 210 insertions(+), 60 deletions(-)
>