Messages in this thread Patch in this message | | | From | Xie Yongji <> | Subject | [PATCH v3 08/11] vdpa: Add eventfd for the vdpa callback | Date | Tue, 28 Feb 2023 17:41:07 +0800 |
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Add eventfd for the vdpa callback so that user can signal it directly instead of running the callback. It will be used for vhost-vdpa case.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com> --- drivers/vhost/vdpa.c | 2 ++ drivers/virtio/virtio_vdpa.c | 1 + include/linux/vdpa.h | 3 +++ 3 files changed, 6 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index dc12dbd5b43b..ae89c0ccc2bb 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -599,9 +599,11 @@ static long vhost_vdpa_vring_ioctl(struct vhost_vdpa *v, unsigned int cmd, if (vq->call_ctx.ctx) { cb.callback = vhost_vdpa_virtqueue_cb; cb.private = vq; + cb.irq_ctx = vq->call_ctx.ctx; } else { cb.callback = NULL; cb.private = NULL; + cb.irq_ctx = NULL; } ops->set_vq_cb(vdpa, idx, &cb); vhost_vdpa_setup_vq_irq(v, idx); diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index 9eee8afabda8..a5cecafbc2d1 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -195,6 +195,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, /* Setup virtqueue callback */ cb.callback = callback ? virtio_vdpa_virtqueue_cb : NULL; cb.private = info; + cb.irq_ctx = NULL; ops->set_vq_cb(vdpa, index, &cb); ops->set_vq_num(vdpa, index, virtqueue_get_vring_size(vq)); diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h index 10bd22387276..94a7ec49583a 100644 --- a/include/linux/vdpa.h +++ b/include/linux/vdpa.h @@ -13,10 +13,13 @@ * struct vdpa_calllback - vDPA callback definition. * @callback: interrupt callback function * @private: the data passed to the callback function + * @irq_ctx: the eventfd for the callback, user can signal + * it directly instead of running the callback */ struct vdpa_callback { irqreturn_t (*callback)(void *data); void *private; + struct eventfd_ctx *irq_ctx; }; /** -- 2.20.1
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