ACK: [PATCH 0/3][SRU][U/OEM-5.13] Fix broken PMU hardware on ADL

[Tim Gardner]

Acked-by: Tim Gardner <tim.gardner at canonical.com>

On 7/12/21 10:36 PM, You-Sheng Yang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1933617
> 
> [Impact]
> 
> PMU hardware init failed on ADL big-only configurations.
> 
> [Fix]
> 
> Fixes in 5.14-rc1 required to address this issue.
> 
> [Test Case]
> 
> While these fixes are only needed on ADL big-only configurations and
> stepping >= 0x03 (those less than 0x03 are engineering samples and
> ignored here), one must make sure an appropriate hw is used for
> validation. The dmesg should contain:
> 
>    NMI watchdog: Enabled. Permanently consumes one hw-PMU counter
> 
> [Where problems could occur]
> 
> This, along with the code segments to be fixed, belongs to a new hardware
> platform, and are splited by switch-cases.
> 
> Kan Liang (3):
>    perf/x86/intel: Fix fixed counter check warning for some Alder Lake
>    perf/x86/intel: Add more events requires FRONTEND MSR on Sapphire
>      Rapids
>    perf/x86/intel: Fix instructions:ppp support in Sapphire Rapids
> 
>   arch/x86/events/intel/core.c | 15 ++++++++++++---
>   1 file changed, 12 insertions(+), 3 deletions(-)
> 

-- 
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Tim Gardner
Canonical, Inc