From: boris.ostrovsky@oracle.com
To: Juergen Gross <jgross@suse.com>,
xen-devel@lists.xenproject.org, x86@kernel.org,
linux-kernel@vger.kernel.org
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v2] x86/xen: disable Firmware First mode for correctable memory errors
Date: Wed, 30 Sep 2020 10:14:58 -0400 [thread overview]
Message-ID: <dd24ff96-4b45-4f5f-62c9-09f0f62c6da4@oracle.com> (raw)
In-Reply-To: <20200925140751.31381-1-jgross@suse.com>
On 9/25/20 10:07 AM, Juergen Gross wrote:
> When running as Xen dom0 the kernel isn't responsible for selecting the
> error handling mode, this should be handled by the hypervisor.
>
> So disable setting FF mode when running as Xen pv guest. Not doing so
> might result in boot splats like:
>
> [ 7.509696] HEST: Enabling Firmware First mode for corrected errors.
> [ 7.510382] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 2.
> [ 7.510383] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 3.
> [ 7.510384] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 4.
> [ 7.510384] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 5.
> [ 7.510385] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 6.
> [ 7.510386] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 7.
> [ 7.510386] mce: [Firmware Bug]: Ignoring request to disable invalid MCA bank 8.
>
> Reason is that the HEST ACPI table contains the real number of MCA
> banks, while the hypervisor is emulating only 2 banks for guests.
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Juergen Gross <jgross@suse.com>
> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Applied to for-linus-5.10
-boris
prev parent reply other threads:[~2020-09-30 14:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-25 14:07 [PATCH v2] x86/xen: disable Firmware First mode for correctable memory errors Juergen Gross
2020-09-30 14:14 ` boris.ostrovsky [this message]
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