Bug 3359 - Intel: Backport Sapphire Rapids PMT errata fix
Summary: Intel: Backport Sapphire Rapids PMT errata fix
Status: RESOLVED FIXED
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: drivers (show other bugs) drivers
Version: unspecified
Hardware: x86_64 Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: GuixinLiu
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-12-06 10:53 UTC by jiayingbao
Modified: 2023-01-17 15:15 UTC (History)
2 users (show)

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Description jiayingbao intel_group 2022-12-06 10:53:46 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
On Sapphire Rapids, due to a hardware issue affecting the PUNIT telemetry
    region, reads that are not done in QWORD quantities and alignment may
    return incorrect data. Use a custom 64-bit copy for this region.

How reproducible:
read pmt data and it's same for low 32bit and high 32bit.

Steps to Reproduce:
1.
2.
3.

Actual results:
read PMT data and show low 32bit is not same as high 32 bit.

Expected results:


Additional info:
Comment 1 jiayingbao intel_group 2022-12-06 14:59:53 UTC 
PR:
https://gitee.com/openeuler/kernel/pulls/311
Comment 2 jiayingbao intel_group 2022-12-06 15:02:12 UTC 
(In reply to jiayingbao from comment #1)

update PR:
https://gitee.com/anolis/cloud-kernel/pulls/971
Comment 3 maqiao alibaba_cloud_group 2023-01-17 15:15:12 UTC 
merged: https://gitee.com/anolis/cloud-kernel/pulls/971