| Message ID | 20220524170610.2255608-4-eperezma@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Implement vdpasim stop operation | expand |
On Wed, May 25, 2022 at 1:06 AM Eugenio Pérez <eperezma@redhat.com> wrote: > > The ioctl adds support for stop the device from userspace. > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > --- > drivers/vhost/vdpa.c | 18 ++++++++++++++++++ > include/uapi/linux/vhost.h | 3 +++ > 2 files changed, 21 insertions(+) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index 32713db5831d..a5d33bad92f9 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -478,6 +478,21 @@ static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp) > return 0; > } > > +static long vhost_vdpa_stop(struct vhost_vdpa *v, u32 __user *argp) > +{ > + struct vdpa_device *vdpa = v->vdpa; > + const struct vdpa_config_ops *ops = vdpa->config; > + int stop; > + > + if (!ops->stop) > + return -EOPNOTSUPP; > + > + if (copy_from_user(&stop, argp, sizeof(stop))) > + return -EFAULT; > + > + return ops->stop(vdpa, stop); > +} > + > static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, > void __user *argp) > { > @@ -650,6 +665,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, > case VHOST_VDPA_GET_VQS_COUNT: > r = vhost_vdpa_get_vqs_count(v, argp); > break; > + case VHOST_STOP: > + r = vhost_vdpa_stop(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 cab645d4a645..e7526968ab0c 100644 > --- a/include/uapi/linux/vhost.h > +++ b/include/uapi/linux/vhost.h > @@ -171,4 +171,7 @@ > #define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \ > struct vhost_vring_state) > > +/* Stop or resume a device so it does not process virtqueue requests anymore */ > +#define VHOST_STOP _IOW(VHOST_VIRTIO, 0x7D, int) > + Unless we know it's a vhost general uAPI, let's use VHOST_VDPA_STOP here. Thanks > #endif > -- > 2.27.0 >
On Wed, May 25, 2022 at 4:51 AM Jason Wang <jasowang@redhat.com> wrote: > > On Wed, May 25, 2022 at 1:06 AM Eugenio Pérez <eperezma@redhat.com> wrote: > > > > The ioctl adds support for stop the device from userspace. > > > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > > --- > > drivers/vhost/vdpa.c | 18 ++++++++++++++++++ > > include/uapi/linux/vhost.h | 3 +++ > > 2 files changed, 21 insertions(+) > > > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > > index 32713db5831d..a5d33bad92f9 100644 > > --- a/drivers/vhost/vdpa.c > > +++ b/drivers/vhost/vdpa.c > > @@ -478,6 +478,21 @@ static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp) > > return 0; > > } > > > > +static long vhost_vdpa_stop(struct vhost_vdpa *v, u32 __user *argp) > > +{ > > + struct vdpa_device *vdpa = v->vdpa; > > + const struct vdpa_config_ops *ops = vdpa->config; > > + int stop; > > + > > + if (!ops->stop) > > + return -EOPNOTSUPP; > > + > > + if (copy_from_user(&stop, argp, sizeof(stop))) > > + return -EFAULT; > > + > > + return ops->stop(vdpa, stop); > > +} > > + > > static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, > > void __user *argp) > > { > > @@ -650,6 +665,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, > > case VHOST_VDPA_GET_VQS_COUNT: > > r = vhost_vdpa_get_vqs_count(v, argp); > > break; > > + case VHOST_STOP: > > + r = vhost_vdpa_stop(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 cab645d4a645..e7526968ab0c 100644 > > --- a/include/uapi/linux/vhost.h > > +++ b/include/uapi/linux/vhost.h > > @@ -171,4 +171,7 @@ > > #define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \ > > struct vhost_vring_state) > > > > +/* Stop or resume a device so it does not process virtqueue requests anymore */ > > +#define VHOST_STOP _IOW(VHOST_VIRTIO, 0x7D, int) > > + > > Unless we know it's a vhost general uAPI, let's use VHOST_VDPA_STOP here. > Ok I'll rename. Thanks! > Thanks > > > #endif > > -- > > 2.27.0 > > >
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index 32713db5831d..a5d33bad92f9 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -478,6 +478,21 @@ static long vhost_vdpa_get_vqs_count(struct vhost_vdpa *v, u32 __user *argp) return 0; } +static long vhost_vdpa_stop(struct vhost_vdpa *v, u32 __user *argp) +{ + struct vdpa_device *vdpa = v->vdpa; + const struct vdpa_config_ops *ops = vdpa->config; + int stop; + + if (!ops->stop) + return -EOPNOTSUPP; + + if (copy_from_user(&stop, argp, sizeof(stop))) + return -EFAULT; + + return ops->stop(vdpa, stop); +} + static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, void __user *argp) { @@ -650,6 +665,9 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep, case VHOST_VDPA_GET_VQS_COUNT: r = vhost_vdpa_get_vqs_count(v, argp); break; + case VHOST_STOP: + r = vhost_vdpa_stop(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 cab645d4a645..e7526968ab0c 100644 --- a/include/uapi/linux/vhost.h +++ b/include/uapi/linux/vhost.h @@ -171,4 +171,7 @@ #define VHOST_VDPA_SET_GROUP_ASID _IOW(VHOST_VIRTIO, 0x7C, \ struct vhost_vring_state) +/* Stop or resume a device so it does not process virtqueue requests anymore */ +#define VHOST_STOP _IOW(VHOST_VIRTIO, 0x7D, int) + #endif
The ioctl adds support for stop the device from userspace. Signed-off-by: Eugenio Pérez <eperezma@redhat.com> --- drivers/vhost/vdpa.c | 18 ++++++++++++++++++ include/uapi/linux/vhost.h | 3 +++ 2 files changed, 21 insertions(+)