On Fri, Oct 14, 2022 at 7:15 PM <sebastien.boeuf@xxxxxxxxx> wrote:
>
> From: Sebastien Boeuf <sebastien.boeuf@xxxxxxxxx>
>
> Implement resume operation for vdpa_sim devices, so vhost-vdpa will
> offer that backend feature and userspace can effectively resume the
> device.
>
> Signed-off-by: Sebastien Boeuf <sebastien.boeuf@xxxxxxxxx>
> ---
> drivers/vdpa/vdpa_sim/vdpa_sim.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index b071f0d842fb..195dc60bad3c 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -527,6 +527,17 @@ static int vdpasim_suspend(struct vdpa_device *vdpa)
> return 0;
> }
>
> +static int vdpasim_resume(struct vdpa_device *vdpa)
> +{
> + struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> +
> + spin_lock(&vdpasim->lock);
> + vdpasim->running = true;
> + spin_unlock(&vdpasim->lock);
Do we need to schedule work here? Or the assumption is that the
individual should take care to make sure no kick is lost during a
suspend/resume?
Thanks
> +
> + return 0;
> +}
> +
> static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
> {
> struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> @@ -717,6 +728,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
> .set_status = vdpasim_set_status,
> .reset = vdpasim_reset,
> .suspend = vdpasim_suspend,
> + .resume = vdpasim_resume,
> .get_config_size = vdpasim_get_config_size,
> .get_config = vdpasim_get_config,
> .set_config = vdpasim_set_config,
> @@ -750,6 +762,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
> .set_status = vdpasim_set_status,
> .reset = vdpasim_reset,
> .suspend = vdpasim_suspend,
> + .resume = vdpasim_resume,
> .get_config_size = vdpasim_get_config_size,
> .get_config = vdpasim_get_config,
> .set_config = vdpasim_set_config,
> --
> 2.34.1
>
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