On Wed, 10 Feb 2016 13:11:34 +0100
Greg Kurz <gk...@linux.vnet.ibm.com> wrote:
> On Wed, 10 Feb 2016 13:21:22 +0200
> "Michael S. Tsirkin" <m...@redhat.com> wrote:
>
> > On Wed, Jan 13, 2016 at 06:09:41PM +0100, Greg Kurz wrote:
> > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
> > > index ad2146a9ab2d..e02e06755ab7 100644
> > > --- a/drivers/vhost/vhost.c
> > > +++ b/drivers/vhost/vhost.c
> > > @@ -43,11 +43,16 @@ enum {
> > > #define vhost_avail_event(vq) ((__virtio16 __user
> > > *)&vq->used->ring[vq->num])
> > >
> > > #ifdef CONFIG_VHOST_CROSS_ENDIAN_LEGACY
> > > -static void vhost_vq_reset_user_be(struct vhost_virtqueue *vq)
> > > +static void vhost_disable_user_be(struct vhost_virtqueue *vq)
> > > {
> > > vq->user_be = !virtio_legacy_is_little_endian();
> > > }
> > >
> >
> > Hmm this doesn't look like an improvement to me.
> > What does it mean to disable big endian? Make it little endian?
>
> The default behavior for the device is native endian.
>
> The SET_VRING_ENDIAN ioctl is used to make the device big endian
> on little endian hosts, hence "enabling" cross-endian mode...
>
> > Existing reset seems to make sense.
> >
>
> ... and we "disable" cross-endian mode on reset.
>
> > > +static void vhost_enable_user_be(struct vhost_virtqueue *vq, bool
> > > user_be)
> > > +{
> > > + vq->user_be = user_be;
> > > +}
> > > +
> >
> > And this is maybe "init_user_be"?
> >
>
> Anyway I don't mind changing the names to reset/init_user_be if you think it
> is clearer.
FWIW, I find the enable/disable terminology less confusing.
