On Mon, Aug 10, 2020 at 09:47:15AM -0400, Michael S. Tsirkin wrote:
> On Fri, Aug 07, 2020 at 03:55:09PM -0400, Vivek Goyal wrote:
> > From: Sebastien Boeuf <sebastien.boeuf@xxxxxxxxx>
> >
> > Virtio defines 'shared memory regions' that provide a continuously
> > shared region between the host and guest.
> >
> > Provide a method to find a particular region on a device.
> >
> > Signed-off-by: Sebastien Boeuf <sebastien.boeuf@xxxxxxxxx>
> > Signed-off-by: Dr. David Alan Gilbert <dgilbert@xxxxxxxxxx>
> > Cc: kvm@xxxxxxxxxxxxxxx
> > Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
>
> I'm not sure why doesn't b4 pick up reset of this
> patchset. where can I find it?
What is b4? I think I might not have copied to right list. I cced
kvm, but probably I should sent it to virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
instead?
>
>
> IIUC all this is 5.10 material, right?
I think so. It probably is too late for 5.9.
Thanks
Vivek
>
>
> > ---
> > include/linux/virtio_config.h | 17 +++++++++++++++++
> > 1 file changed, 17 insertions(+)
> >
> > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> > index bb4cc4910750..c859f000a751 100644
> > --- a/include/linux/virtio_config.h
> > +++ b/include/linux/virtio_config.h
> > @@ -10,6 +10,11 @@
> >
> > struct irq_affinity;
> >
> > +struct virtio_shm_region {
> > + u64 addr;
> > + u64 len;
> > +};
> > +
> > /**
> > * virtio_config_ops - operations for configuring a virtio device
> > * Note: Do not assume that a transport implements all of the operations
> > @@ -65,6 +70,7 @@ struct irq_affinity;
> > * the caller can then copy.
> > * @set_vq_affinity: set the affinity for a virtqueue (optional).
> > * @get_vq_affinity: get the affinity for a virtqueue (optional).
> > + * @get_shm_region: get a shared memory region based on the index.
> > */
> > typedef void vq_callback_t(struct virtqueue *);
> > struct virtio_config_ops {
> > @@ -88,6 +94,8 @@ struct virtio_config_ops {
> > const struct cpumask *cpu_mask);
> > const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev,
> > int index);
> > + bool (*get_shm_region)(struct virtio_device *vdev,
> > + struct virtio_shm_region *region, u8 id);
> > };
> >
> > /* If driver didn't advertise the feature, it will never appear. */
> > @@ -250,6 +258,15 @@ int virtqueue_set_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask)
> > return 0;
> > }
> >
> > +static inline
> > +bool virtio_get_shm_region(struct virtio_device *vdev,
> > + struct virtio_shm_region *region, u8 id)
> > +{
> > + if (!vdev->config->get_shm_region)
> > + return false;
> > + return vdev->config->get_shm_region(vdev, region, id);
> > +}
> > +
> > static inline bool virtio_is_little_endian(struct virtio_device *vdev)
> > {
> > return virtio_has_feature(vdev, VIRTIO_F_VERSION_1) ||
> > --
> > 2.25.4
>
