• Juergen Gross's avatar
    xen/netback: use lateeoi irq binding · 23025393
    Juergen Gross authored
    In order to reduce the chance for the system becoming unresponsive due
    to event storms triggered by a misbehaving netfront use the lateeoi
    irq binding for netback and unmask the event channel only just before
    going to sleep waiting for new events.
    
    Make sure not to issue an EOI when none is pending by introducing an
    eoi_pending element to struct xenvif_queue.
    
    When no request has been consumed set the spurious flag when sending
    the EOI for an interrupt.
    
    This is part of XSA-332.
    
    Cc: stable@vger.kernel.org
    Reported-by: default avatarJulien Grall <julien@xen.org>
    Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
    Reviewed-by: default avatarJan Beulich <jbeulich@suse.com>
    Reviewed-by: default avatarWei Liu <wl@xen.org>
    23025393
common.h 13.2 KB