Re: [PATCH v2 1/2] x86: Enable x2apic during resume from suspend if used previously

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To: Mario Limonciello <mario.limonciello@xxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@xxxxxxxxxx>, Linux kernel regressions list <regressions@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH v2 1/2] x86: Enable x2apic during resume from suspend if used previously
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Wed, 01 Nov 2023 00:20:03 +0100
Cc: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>, Jiri Olsa <jolsa@xxxxxxxxxx>, Namhyung Kim <namhyung@xxxxxxxxxx>, Ian Rogers <irogers@xxxxxxxxxx>, Adrian Hunter <adrian.hunter@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, "Rafael J . Wysocki" <rafael@xxxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>, Pavel Machek <pavel@xxxxxx>, David Woodhouse <dwmw@xxxxxxxxxxxx>, Sandipan Das <sandipan.das@xxxxxxx>, "open list:PERFORMANCE EVENTS SUBSYSTEM" <linux-perf-users@xxxxxxxxxxxxxxx>, "open list:PERFORMANCE EVENTS SUBSYSTEM" <linux-kernel@xxxxxxxxxxxxxxx>, "open list:SUSPEND TO RAM" <linux-pm@xxxxxxxxxxxxxxx>, "open list:ACPI" <linux-acpi@xxxxxxxxxxxxxxx>
In-reply-to: <d7c3a03e-6f52-4bcf-aaae-668f6601ceb8@amd.com>
References: <20231026170330.4657-1-mario.limonciello@amd.com> <20231026170330.4657-2-mario.limonciello@amd.com> <87wmv721nm.ffs@tglx> <d7c3a03e-6f52-4bcf-aaae-668f6601ceb8@amd.com>

On Tue, Oct 31 2023 at 13:53, Mario Limonciello wrote:
> Thank you for looking this over.  I've reviewed it with the internal 
> team and confirmed there was a BIOS bug where the MSR wasn't restored 
> after the S3 cycle completed.  The BIOS team has fixed it.

Why am I not surprised?

Thanks for the heads up!

       tglx

References:
- [PATCH v2 0/2] Fixes for s3 with parallel bootup
  - From: Mario Limonciello
- [PATCH v2 1/2] x86: Enable x2apic during resume from suspend if used previously
  - From: Mario Limonciello
- Re: [PATCH v2 1/2] x86: Enable x2apic during resume from suspend if used previously
  - From: Thomas Gleixner
- Re: [PATCH v2 1/2] x86: Enable x2apic during resume from suspend if used previously
  - From: Mario Limonciello

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