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* vringh: kill off ACCESS_ONCE()Mark Rutland2016-12-151-2/+3
| | | | | | | | | | | | | | | | | | | | | | Despite living under drivers/ vringh.c is also used as part of the userspace virtio tools. Before we can kill off the ACCESS_ONCE()definition in the tools, we must convert vringh.c to use {READ,WRITE}_ONCE(). This patch does so, along with the required include of <linux/compiler.h> for the relevant definitions. The userspace tools provide their own definitions in their own <linux/compiler.h>. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Jason Wang <jasowang@redhat.com>
* vringh: update for virtio 1.0 APIsMichael S. Tsirkin2014-12-151-47/+74
| | | | | | | | When switching everything over to virtio 1.0 memory access APIs, I missed converting vringh. Fortunately, it's straight-forward. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* vringh: 64 bit featuresMichael S. Tsirkin2014-12-151-2/+2
| | | | | | Pass u64 everywhere. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
* Add missing module license tag to vring helpers.Dave Jones2013-05-081-0/+3
| | | | | | | [ 624.286653] vringh: module license 'unspecified' taints kernel. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* vringh: host-side implementation of virtio rings.Rusty Russell2013-03-201-0/+1007
Getting use of virtio rings correct is tricky, and a recent patch saw an implementation of in-kernel rings (as separate from userspace). This abstracts the business of dealing with the virtio ring layout from the access (userspace or direct); to do this, we use function pointers, which gcc inlines correctly. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Michael S. Tsirkin <mst@redhat.com>