netdev - Re: [PATCH v9 26/32] virtio_mmio: support the arg sizes of find

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Date:   Tue, 12 Apr 2022 15:13:53 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        virtualization@...ts.linux-foundation.org
Cc:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Vadim Pasternak <vadimp@...dia.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Cornelia Huck <cohuck@...hat.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Vincent Whitchurch <vincent.whitchurch@...s.com>,
        linux-um@...ts.infradead.org, netdev@...r.kernel.org,
        platform-driver-x86@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v9 26/32] virtio_mmio: support the arg sizes of find_vqs()


在 2022/4/6 上午11:43, Xuan Zhuo 写道:
> Virtio MMIO support the new parameter sizes of find_vqs().
>
> Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> ---


Acked-by: Jason Wang <jasowang@...hat.com>


>   drivers/virtio/virtio_mmio.c | 8 ++++++--
>   1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
> index 9d5a674bdeec..51cf51764a92 100644
> --- a/drivers/virtio/virtio_mmio.c
> +++ b/drivers/virtio/virtio_mmio.c
> @@ -347,7 +347,7 @@ static void vm_del_vqs(struct virtio_device *vdev)
>   
>   static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index,
>   				  void (*callback)(struct virtqueue *vq),
> -				  const char *name, bool ctx)
> +				  const char *name, u32 size, bool ctx)
>   {
>   	struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
>   	struct virtio_mmio_vq_info *info;
> @@ -382,8 +382,11 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index,
>   		goto error_new_virtqueue;
>   	}
>   
> +	if (!size || size > num)
> +		size = num;
> +
>   	/* Create the vring */
> -	vq = vring_create_virtqueue(index, num, VIRTIO_MMIO_VRING_ALIGN, vdev,
> +	vq = vring_create_virtqueue(index, size, VIRTIO_MMIO_VRING_ALIGN, vdev,
>   				 true, true, ctx, vm_notify, callback, name);
>   	if (!vq) {
>   		err = -ENOMEM;
> @@ -484,6 +487,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
>   		}
>   
>   		vqs[i] = vm_setup_vq(vdev, queue_idx++, callbacks[i], names[i],
> +				     sizes ? sizes[i] : 0,
>   				     ctx ? ctx[i] : false);
>   		if (IS_ERR(vqs[i])) {
>   			vm_del_vqs(vdev);