On Tue, 15 Sep 2015 14:41:57 +0800 Jason Wang <jasowang@xxxxxxxxxx> wrote: > Currently, if we had a zero length mmio eventfd assigned on > KVM_MMIO_BUS. It will never be found by kvm_io_bus_cmp() since it > always compares the kvm_io_range() with the length that guest > wrote. This will cause e.g for vhost, kick will be trapped by qemu > userspace instead of vhost. Fixing this by using zero length if an > iodevice is zero length. > > Cc: stable@xxxxxxxxxxxxxxx > Cc: Gleb Natapov <gleb@xxxxxxxxxx> > Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> > Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx> > --- > virt/kvm/kvm_main.c | 19 +++++++++++++++++-- > 1 file changed, 17 insertions(+), 2 deletions(-) Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
