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@xxxxxxxxxxxxxxx > Signed-off-by: Juergen Gross <jgross@xxxxxxxx> > Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx> Applied to for-linus-5.10 -boris
