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Re: [RFC v2 2/7] virtio: Add virtio_queue_host_notifier_status
From: |
Stefan Hajnoczi |
Subject: |
Re: [RFC v2 2/7] virtio: Add virtio_queue_host_notifier_status |
Date: |
Wed, 17 Feb 2021 12:41:34 +0000 |
On Tue, Feb 09, 2021 at 04:37:52PM +0100, Eugenio Pérez wrote:
> This allows shadow virtqueue code to assert the queue status before
> making changes.
>
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
> ---
> include/hw/virtio/virtio.h | 1 +
> hw/virtio/virtio.c | 5 +++++
> 2 files changed, 6 insertions(+)
>
> diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> index b7ece7a6a8..227cec13a8 100644
> --- a/include/hw/virtio/virtio.h
> +++ b/include/hw/virtio/virtio.h
> @@ -316,6 +316,7 @@ void virtio_device_release_ioeventfd(VirtIODevice *vdev);
> bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
> EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
> void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
> +bool virtio_queue_host_notifier_status(const VirtQueue *vq);
> void virtio_queue_host_notifier_read(EventNotifier *n);
> void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext
> *ctx,
> VirtIOHandleAIOOutput
> handle_output);
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 1fd1917ca0..53473ae4df 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -3594,6 +3594,11 @@ EventNotifier
> *virtio_queue_get_host_notifier(VirtQueue *vq)
> return &vq->host_notifier;
> }
>
> +bool virtio_queue_host_notifier_status(const VirtQueue *vq)
> +{
> + return vq->host_notifier_enabled;
> +}
> +
> void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled)
Since there is a virtio_queue_set_host_notifier_enabled() I suggest
calling this function virtio_queue_is_host_notifier_enabled() or
virtio_queue_get_host_notifier_enabled(). That way it's clear they
set/get the same thing.
Stefan
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- [RFC v2 0/7] vDPA shadow virtqueue - notifications forwarding, Eugenio Pérez, 2021/02/09
- [RFC v2 2/7] virtio: Add virtio_queue_host_notifier_status, Eugenio Pérez, 2021/02/09
- Re: [RFC v2 2/7] virtio: Add virtio_queue_host_notifier_status,
Stefan Hajnoczi <=
- [RFC v2 3/7] vhost: Save masked_notifier state, Eugenio Pérez, 2021/02/09
- [RFC v2 4/7] vhost: Add VhostShadowVirtqueue, Eugenio Pérez, 2021/02/09
- [RFC v2 5/7] vhost: Add x-vhost-enable-shadow-vq qmp, Eugenio Pérez, 2021/02/09