linux-kernel - Re: [PATCH v2 07/17] vdpa_sim: add device id field in vdpasim_dev

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Message-ID: <0fb8b4be-4287-6bff-e430-3c9e8aae0daa@redhat.com>
Date:   Mon, 30 Nov 2020 11:10:38 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Stefano Garzarella <sgarzare@...hat.com>,
        virtualization@...ts.linux-foundation.org
Cc:     Stefan Hajnoczi <stefanha@...hat.com>,
        linux-kernel@...r.kernel.org, Laurent Vivier <lvivier@...hat.com>,
        Max Gurtovoy <mgurtovoy@...dia.com>,
        "Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>
Subject: Re: [PATCH v2 07/17] vdpa_sim: add device id field in
 vdpasim_dev_attr


On 2020/11/26 下午10:49, Stefano Garzarella wrote:
> Remove VDPASIM_DEVICE_ID macro and add 'id' field in vdpasim_dev_attr,
> that will be returned by vdpasim_get_device_id().
>
> Use VIRTIO_ID_NET for vDPA-net simulator device id.
>
> Co-developed-by: Max Gurtovoy <mgurtovoy@...dia.com>
> Signed-off-by: Max Gurtovoy <mgurtovoy@...dia.com>
> Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
> ---
>   drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 +++++--
>   1 file changed, 5 insertions(+), 2 deletions(-)


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


>
> diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> index f98262add0e1..393b54a9f0e4 100644
> --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
> +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
> @@ -44,7 +44,6 @@ struct vdpasim_virtqueue {
>   
>   #define VDPASIM_QUEUE_ALIGN PAGE_SIZE
>   #define VDPASIM_QUEUE_MAX 256
> -#define VDPASIM_DEVICE_ID 0x1
>   #define VDPASIM_VENDOR_ID 0
>   #define VDPASIM_IOTLB_LIMIT 0 /* unlimited */
>   #define VDPASIM_VQ_NUM 0x2
> @@ -57,6 +56,7 @@ static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |
>   
>   struct vdpasim_dev_attr {
>   	int nvqs;
> +	u32 id;
>   };
>   
>   /* State of each vdpasim device */
> @@ -536,7 +536,9 @@ static u16 vdpasim_get_vq_num_max(struct vdpa_device *vdpa)
>   
>   static u32 vdpasim_get_device_id(struct vdpa_device *vdpa)
>   {
> -	return VDPASIM_DEVICE_ID;
> +	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
> +
> +	return vdpasim->dev_attr.id;
>   }
>   
>   static u32 vdpasim_get_vendor_id(struct vdpa_device *vdpa)
> @@ -719,6 +721,7 @@ static int __init vdpasim_dev_init(void)
>   {
>   	struct vdpasim_dev_attr dev_attr = {};
>   
> +	dev_attr.id = VIRTIO_ID_NET;
>   	dev_attr.nvqs = VDPASIM_VQ_NUM;
>   
>   	vdpasim_dev = vdpasim_create(&dev_attr);