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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Wed, 4 Jan 2023 14:57:05 -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
Subject: Re: [PATCH 0/5] Fix UPI uncore issue on SPR

Hi Peter,

Happy new year!

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

Thanks,
Kan

On 2022-11-29 2:10 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(-)
>