| Message ID | 20220623160738.632852-2-eperezma@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Implement vdpasim suspend operation | expand |
On Thu, Jun 23, 2022 at 06:07:35PM +0200, Eugenio Pérez wrote: >This operation is optional: It it's not implemented, backend feature bit >will not be exposed. > >Signed-off-by: Eugenio Pérez <eperezma@redhat.com> >--- > include/linux/vdpa.h | 4 ++++ > 1 file changed, 4 insertions(+) > >diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h >index 7b4a13d3bd91..d282f464d2f1 100644 >--- a/include/linux/vdpa.h >+++ b/include/linux/vdpa.h >@@ -218,6 +218,9 @@ struct vdpa_map_file { > * @reset: Reset device > * @vdev: vdpa device > * Returns integer: success (0) or error (< 0) >+ * @suspend: Suspend or resume the device (optional) ^ IIUC we removed the resume operation (that should be done with reset), so should we update this documentation? Thanks, Stefano >+ * @vdev: vdpa device >+ * Returns integer: success (0) or error (< 0) > * @get_config_size: Get the size of the configuration space includes > * fields that are conditional on feature bits. > * @vdev: vdpa device >@@ -319,6 +322,7 @@ struct vdpa_config_ops { > u8 (*get_status)(struct vdpa_device *vdev); > void (*set_status)(struct vdpa_device *vdev, u8 status); > int (*reset)(struct vdpa_device *vdev); >+ int (*suspend)(struct vdpa_device *vdev); > size_t (*get_config_size)(struct vdpa_device *vdev); > void (*get_config)(struct vdpa_device *vdev, unsigned int offset, > void *buf, unsigned int len); >-- >2.31.1 >
On Fri, Jun 24, 2022 at 12:07 AM Eugenio Pérez <eperezma@redhat.com> wrote: > > This operation is optional: It it's not implemented, backend feature bit > will not be exposed. A question, do we allow suspending a device without DRIVER_OK? Thanks > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > --- > include/linux/vdpa.h | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > index 7b4a13d3bd91..d282f464d2f1 100644 > --- a/include/linux/vdpa.h > +++ b/include/linux/vdpa.h > @@ -218,6 +218,9 @@ struct vdpa_map_file { > * @reset: Reset device > * @vdev: vdpa device > * Returns integer: success (0) or error (< 0) > + * @suspend: Suspend or resume the device (optional) > + * @vdev: vdpa device > + * Returns integer: success (0) or error (< 0) > * @get_config_size: Get the size of the configuration space includes > * fields that are conditional on feature bits. > * @vdev: vdpa device > @@ -319,6 +322,7 @@ struct vdpa_config_ops { > u8 (*get_status)(struct vdpa_device *vdev); > void (*set_status)(struct vdpa_device *vdev, u8 status); > int (*reset)(struct vdpa_device *vdev); > + int (*suspend)(struct vdpa_device *vdev); > size_t (*get_config_size)(struct vdpa_device *vdev); > void (*get_config)(struct vdpa_device *vdev, unsigned int offset, > void *buf, unsigned int len); > -- > 2.31.1 >
On Tue, Jun 28, 2022 at 3:40 PM Stefano Garzarella <sgarzare@redhat.com> wrote: > > On Thu, Jun 23, 2022 at 06:07:35PM +0200, Eugenio Pérez wrote: > >This operation is optional: It it's not implemented, backend feature bit > >will not be exposed. > > > >Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > >--- > > include/linux/vdpa.h | 4 ++++ > > 1 file changed, 4 insertions(+) > > > >diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > >index 7b4a13d3bd91..d282f464d2f1 100644 > >--- a/include/linux/vdpa.h > >+++ b/include/linux/vdpa.h > >@@ -218,6 +218,9 @@ struct vdpa_map_file { > > * @reset: Reset device > > * @vdev: vdpa device > > * Returns integer: success (0) or error (< 0) > >+ * @suspend: Suspend or resume the device (optional) > ^ > IIUC we removed the resume operation (that should be done with reset), > so should we update this documentation? > Totally, I forgot to update the doc. I'll send a new version with that. Thanks! > Thanks, > Stefano > > >+ * @vdev: vdpa device > >+ * Returns integer: success (0) or error (< 0) > > * @get_config_size: Get the size of the configuration space includes > > * fields that are conditional on feature bits. > > * @vdev: vdpa device > >@@ -319,6 +322,7 @@ struct vdpa_config_ops { > > u8 (*get_status)(struct vdpa_device *vdev); > > void (*set_status)(struct vdpa_device *vdev, u8 status); > > int (*reset)(struct vdpa_device *vdev); > >+ int (*suspend)(struct vdpa_device *vdev); > > size_t (*get_config_size)(struct vdpa_device *vdev); > > void (*get_config)(struct vdpa_device *vdev, unsigned int offset, > > void *buf, unsigned int len); > >-- > >2.31.1 > > >
On Wed, Jun 29, 2022 at 6:10 AM Jason Wang <jasowang@redhat.com> wrote: > > On Fri, Jun 24, 2022 at 12:07 AM Eugenio Pérez <eperezma@redhat.com> wrote: > > > > This operation is optional: It it's not implemented, backend feature bit > > will not be exposed. > > A question, do we allow suspending a device without DRIVER_OK? > That should be invalid. In particular, vdpa_sim will resume in that case, but I guess it would depend on the device. Do you think it should be controlled in the vdpa frontend code? Thanks! > Thanks > > > > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > > --- > > include/linux/vdpa.h | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > index 7b4a13d3bd91..d282f464d2f1 100644 > > --- a/include/linux/vdpa.h > > +++ b/include/linux/vdpa.h > > @@ -218,6 +218,9 @@ struct vdpa_map_file { > > * @reset: Reset device > > * @vdev: vdpa device > > * Returns integer: success (0) or error (< 0) > > + * @suspend: Suspend or resume the device (optional) > > + * @vdev: vdpa device > > + * Returns integer: success (0) or error (< 0) > > * @get_config_size: Get the size of the configuration space includes > > * fields that are conditional on feature bits. > > * @vdev: vdpa device > > @@ -319,6 +322,7 @@ struct vdpa_config_ops { > > u8 (*get_status)(struct vdpa_device *vdev); > > void (*set_status)(struct vdpa_device *vdev, u8 status); > > int (*reset)(struct vdpa_device *vdev); > > + int (*suspend)(struct vdpa_device *vdev); > > size_t (*get_config_size)(struct vdpa_device *vdev); > > void (*get_config)(struct vdpa_device *vdev, unsigned int offset, > > void *buf, unsigned int len); > > -- > > 2.31.1 > > >
On Fri, Jul 8, 2022 at 7:31 PM Eugenio Perez Martin <eperezma@redhat.com> wrote: > > On Wed, Jun 29, 2022 at 6:10 AM Jason Wang <jasowang@redhat.com> wrote: > > > > On Fri, Jun 24, 2022 at 12:07 AM Eugenio Pérez <eperezma@redhat.com> wrote: > > > > > > This operation is optional: It it's not implemented, backend feature bit > > > will not be exposed. > > > > A question, do we allow suspending a device without DRIVER_OK? > > > > That should be invalid. In particular, vdpa_sim will resume in that > case, but I guess it would depend on the device. Yes, and that will match our virtio spec patch (STOP bit). > > Do you think it should be controlled in the vdpa frontend code? The vdpa bus should validate this at least. Thanks > > Thanks! > > > Thanks > > > > > > > > Signed-off-by: Eugenio Pérez <eperezma@redhat.com> > > > --- > > > include/linux/vdpa.h | 4 ++++ > > > 1 file changed, 4 insertions(+) > > > > > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h > > > index 7b4a13d3bd91..d282f464d2f1 100644 > > > --- a/include/linux/vdpa.h > > > +++ b/include/linux/vdpa.h > > > @@ -218,6 +218,9 @@ struct vdpa_map_file { > > > * @reset: Reset device > > > * @vdev: vdpa device > > > * Returns integer: success (0) or error (< 0) > > > + * @suspend: Suspend or resume the device (optional) > > > + * @vdev: vdpa device > > > + * Returns integer: success (0) or error (< 0) > > > * @get_config_size: Get the size of the configuration space includes > > > * fields that are conditional on feature bits. > > > * @vdev: vdpa device > > > @@ -319,6 +322,7 @@ struct vdpa_config_ops { > > > u8 (*get_status)(struct vdpa_device *vdev); > > > void (*set_status)(struct vdpa_device *vdev, u8 status); > > > int (*reset)(struct vdpa_device *vdev); > > > + int (*suspend)(struct vdpa_device *vdev); > > > size_t (*get_config_size)(struct vdpa_device *vdev); > > > void (*get_config)(struct vdpa_device *vdev, unsigned int offset, > > > void *buf, unsigned int len); > > > -- > > > 2.31.1 > > > > > >
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 7b4a13d3bd91..d282f464d2f1 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -218,6 +218,9 @@ struct vdpa_map_file { * @reset: Reset device * @vdev: vdpa device * Returns integer: success (0) or error (< 0) + * @suspend: Suspend or resume the device (optional) + * @vdev: vdpa device + * Returns integer: success (0) or error (< 0) * @get_config_size: Get the size of the configuration space includes * fields that are conditional on feature bits. * @vdev: vdpa device @@ -319,6 +322,7 @@ struct vdpa_config_ops { u8 (*get_status)(struct vdpa_device *vdev); void (*set_status)(struct vdpa_device *vdev, u8 status); int (*reset)(struct vdpa_device *vdev); + int (*suspend)(struct vdpa_device *vdev); size_t (*get_config_size)(struct vdpa_device *vdev); void (*get_config)(struct vdpa_device *vdev, unsigned int offset, void *buf, unsigned int len);
This operation is optional: It it's not implemented, backend feature bit will not be exposed. Signed-off-by: Eugenio Pérez <eperezma@redhat.com> --- include/linux/vdpa.h | 4 ++++ 1 file changed, 4 insertions(+)