From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Greg KH <gregkh@linuxfoundation.org>,
stable <stable@vger.kernel.org>,
linux-kernel@vger.kernel.org, linux-tip-commits@vger.kernel.org,
Sandipan Das <sandipan.das@amd.com>,
x86@kernel.org
Subject: Re: [tip: x86/urgent] x86/cpu/amd: Fix workaround for erratum 1054
Date: Fri, 18 Apr 2025 14:41:25 +0200 [thread overview]
Message-ID: <aAJIdUAHfwo8d7WS@gmail.com> (raw)
In-Reply-To: <20250418123713.GCaAJHedTC_JWN__Td@fat_crate.local>
* Borislav Petkov <bp@alien8.de> wrote:
> > plus the erratum is a perf-counters information quality bug
> > affecting what appears to be a limited number of models, with the
> > workaround
>
> No, the fix is needed because Zen2 and newer won't set
> MSR_K7_HWCR_IRPERF_EN_BIT. It needs to go everywhere.
Fair enough - the current version already has Cc: stable:
263e55949d89 x86/cpu/amd: Fix workaround for erratum 1054
...
Fixes: 232afb557835 ("x86/CPU/AMD: Add X86_FEATURE_ZEN1")
Signed-off-by: Sandipan Das <sandipan.das@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Borislav Petkov <bp@alien8.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/caa057a9d6f8ad579e2f1abaa71efbd5bd4eaf6d.1744956467.git.sandipan.das@amd.com
Thanks,
Ingo
next prev parent reply other threads:[~2025-04-18 12:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <174495817953.31282.5641497960291856424.tip-bot2@tip-bot2>
[not found] ` <20250418104013.GAaAIsDW2skB12L-nm@renoirsky.local>
[not found] ` <aAJBgCjGpvyI43E3@gmail.com>
2025-04-18 12:37 ` [tip: x86/urgent] x86/cpu/amd: Fix workaround for erratum 1054 Borislav Petkov
2025-04-18 12:41 ` Ingo Molnar [this message]
2025-04-18 12:47 ` Greg KH
2025-04-18 12:56 ` Ingo Molnar
2025-04-18 12:37 tip-bot2 for Sandipan Das
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