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SubjectRe: [PATCH v2] x86/xen: disable Firmware First mode for correctable memory errors
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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

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