linux-kernel - Re: powerpc: fix 32-bit KVM-PR lockup and panic with MacOS guest

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Message-Id: <445RN572ccz9sB8@ozlabs.org>
Date:   Fri, 22 Feb 2019 20:47:49 +1100 (AEDT)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Mark Cave-Ayland <mark.cave-ayland@...nde.co.uk>,
        benh@...nel.crashing.org, paulus@...ba.org, npiggin@...il.com,
        christophe.leroy@....fr, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, kvm-ppc@...r.kernel.org
Subject: Re: powerpc: fix 32-bit KVM-PR lockup and panic with MacOS guest

On Fri, 2019-02-08 at 14:33:19 UTC, Mark Cave-Ayland wrote:
> Commit 8792468da5e1 "powerpc: Add the ability to save FPU without giving it up"
> unexpectedly removed the MSR_FE0 and MSR_FE1 bits from the bitmask used to
> update the MSR of the previous thread in __giveup_fpu() causing a KVM-PR MacOS
> guest to lockup and panic the kernel.
> 
> Reinstate these bits to the MSR bitmask to enable MacOS guests to run under
> 32-bit KVM-PR once again without issue.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@...nde.co.uk>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/fe1ef6bcdb4fca33434256a802a3ed6a

cheers