linux-kernel - Re: [PATCH 1/1] x86: SMP broken on Xen PV DomU since 6.9

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Message-ID: <871q0sun69.ffs@tglx>
Date: Mon, 07 Oct 2024 14:12:30 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Jürgen Groß <jgross@...e.com>, x86@...nel.org,
 Borislav Petkov
 <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>, "H. Peter Anvin"
 <hpa@...or.com>, "Peter Zijlstra (Intel)" <peterz@...radead.org>, Ingo
 Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
 linux-arch@...r.kernel.org
Subject: Re: [PATCH 1/1] x86: SMP broken on Xen PV DomU since 6.9

On Fri, Oct 04 2024 at 12:29, Jürgen Groß wrote:
> From: Juergen Gross <jgross@...e.com>
> Date: Fri, 4 Oct 2024 12:22:12 +0200
> Subject: [PATCH] x86/xen: mark boot CPU of PV guest in MSR_IA32_APICBASE
>
> Recent topology checks of the x86 boot code uncovered the need for
> PV guests to have the boot cpu marked in the APICBASE MSR.
>
> Fixes: 9d22c96316ac ("x86/topology: Handle bogus ACPI tables correctly")
> Reported-by: Niels Dettenbach <nd@...dicat.com>
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>