On 2020/12/30 下午6:05, Eli Cohen wrote:
On Wed, Dec 16, 2020 at 02:48:09PM +0800, Jason Wang wrote:
Follows the vDPA support for multiple address spaces, this patch
introduce uAPI for the userspace to know the number of virtqueue
groups supported by the vDPA device.
Signed-off-by: Jason Wang<jasowang@xxxxxxxxxx>
---
drivers/vhost/vdpa.c | 4 ++++
include/uapi/linux/vhost.h | 3 +++
2 files changed, 7 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 060d5b5b7e64..1ba5901b28e7 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -536,6 +536,10 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
case VHOST_VDPA_GET_VRING_NUM:
r = vhost_vdpa_get_vring_num(v, argp);
break;
+ case VHOST_VDPA_GET_GROUP_NUM:
+ r = copy_to_user(argp, &v->vdpa->ngroups,
+ sizeof(v->vdpa->ngroups));
+ break;
Is this and other ioctls already supported in qemu?
Not yet, the prototype is under development.
I test the series with a small and dedicated userspace program.
Thanks
