On Tue, Mar 15, 2022 at 11:26 AM Longpeng(Mike) <[email protected]> wrote:
> From: Longpeng <[email protected]> > > - GET_VQS_COUNT: the count of virtqueues that exposed > Acked-by: Jason Wang <[email protected]> > > Signed-off-by: Longpeng <[email protected]> > --- > drivers/vhost/vdpa.c | 13 +++++++++++++ > include/uapi/linux/vhost.h | 3 +++ > 2 files changed, 16 insertions(+) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 0c82eb5..69b3f05 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -370,6 +370,16 @@ static long vhost_vdpa_get_config_size(struct > vhost_vdpa *v, u32 __user *argp) > return 0; > } > > +static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user > *argp) > +{ > + struct vdpa_device *vdpa = v->vdpa; > + > + if (copy_to_user(argp, &vdpa->nvqs, sizeof(vdpa->nvqs))) > + return -EFAULT; > + > + return 0; > +} > + > static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, > void __user *argp) > { > @@ -510,6 +520,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file > *filep, > case VHOST_VDPA_GET_CONFIG_SIZE: > r = vhost_vdpa_get_config_size(v, argp); > break; > + case VHOST_VDPA_GET_VQS_COUNT: > + r = vhost_vdpa_get_vqs_count(v, argp); > + break; > default: > r = vhost_dev_ioctl(&v->vdev, cmd, argp); > if (r == -ENOIOCTLCMD) > diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h > index bc74e95..5d99e7c 100644 > --- a/include/uapi/linux/vhost.h > +++ b/include/uapi/linux/vhost.h > @@ -154,4 +154,7 @@ > /* Get the config size */ > #define VHOST_VDPA_GET_CONFIG_SIZE _IOR(VHOST_VIRTIO, 0x79, __u32) > > +/* Get the count of all virtqueues */ > +#define VHOST_VDPA_GET_VQS_COUNT _IOR(VHOST_VIRTIO, 0x80, __u32) > + > #endif > -- > 1.8.3.1 > >
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