• Juergen Gross's avatar
    x86/xen: disable Firmware First mode for correctable memory errors · b9cc04b0
    Juergen Gross authored
    
    
    commit d759af38572f97321112a0852353613d18126038 upstream.
    
    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: default avatarJuergen Gross <jgross@suse.com>
    Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
    Link: https://lore.kernel.org/r/20200925140751.31381-1-jgross@suse.com
    
    Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    b9cc04b0
enlighten_pv.c 36.9 KB