Commit 011c35ba authored by Stefano Garzarella's avatar Stefano Garzarella Committed by Michael S. Tsirkin
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vdpa_sim: add supported_features field in vdpasim_dev_attr 



Introduce a new VDPASIM_FEATURES macro with the generic features
supported by the vDPA simulator, and VDPASIM_NET_FEATURES macro with
vDPA-net features.

Add 'supported_features' field in vdpasim_dev_attr, to allow devices
to specify their features.

Co-developed-by: default avatarMax Gurtovoy <mgurtovoy@nvidia.com>
Signed-off-by: default avatarMax Gurtovoy <mgurtovoy@nvidia.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20201215144256.155342-9-sgarzare@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 2f8f4618

drivers/vdpa/vdpa_sim/vdpa_sim.c

+18 −11
Original line number Diff line number Diff line
@@ -59,12 +59,15 @@ struct vdpasim_virtqueue { 
#define VDPASIM_VQ_NUM 0x2

#define VDPASIM_NAME "vdpasim-netdev"



static u64 vdpasim_features = (1ULL << VIRTIO_F_ANY_LAYOUT) |

			      (1ULL << VIRTIO_F_VERSION_1)  |

			      (1ULL << VIRTIO_F_ACCESS_PLATFORM) |

			      (1ULL << VIRTIO_NET_F_MAC);

#define VDPASIM_FEATURES	((1ULL << VIRTIO_F_ANY_LAYOUT) | \

				 (1ULL << VIRTIO_F_VERSION_1)  | \

				 (1ULL << VIRTIO_F_ACCESS_PLATFORM))



#define VDPASIM_NET_FEATURES	(VDPASIM_FEATURES | \

				 (1ULL << VIRTIO_NET_F_MAC))



struct vdpasim_dev_attr {

	u64 supported_features;

	int nvqs;

	u32 id;

};
@@ -122,7 +125,7 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx) 
{

	struct vdpasim_virtqueue *vq = &vdpasim->vqs[idx];



	vringh_init_iotlb(&vq->vring, vdpasim_features,

	vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,

			  VDPASIM_QUEUE_MAX, false,

			  (struct vring_desc *)(uintptr_t)vq->desc_addr,

			  (struct vring_avail *)
@@ -131,7 +134,8 @@ static void vdpasim_queue_ready(struct vdpasim *vdpasim, unsigned int idx) 
			  (uintptr_t)vq->device_addr);

}



static void vdpasim_vq_reset(struct vdpasim_virtqueue *vq)

static void vdpasim_vq_reset(struct vdpasim *vdpasim,

			     struct vdpasim_virtqueue *vq)

{

	vq->ready = false;

	vq->desc_addr = 0;
@@ -139,8 +143,8 @@ static void vdpasim_vq_reset(struct vdpasim_virtqueue *vq) 
	vq->device_addr = 0;

	vq->cb = NULL;

	vq->private = NULL;

	vringh_init_iotlb(&vq->vring, vdpasim_features, VDPASIM_QUEUE_MAX,

			  false, NULL, NULL, NULL);

	vringh_init_iotlb(&vq->vring, vdpasim->dev_attr.supported_features,

			  VDPASIM_QUEUE_MAX, false, NULL, NULL, NULL);

}



static void vdpasim_reset(struct vdpasim *vdpasim)
@@ -148,7 +152,7 @@ static void vdpasim_reset(struct vdpasim *vdpasim) 
	int i;



	for (i = 0; i < vdpasim->dev_attr.nvqs; i++)

		vdpasim_vq_reset(&vdpasim->vqs[i]);

		vdpasim_vq_reset(vdpasim, &vdpasim->vqs[i]);



	spin_lock(&vdpasim->iommu_lock);

	vhost_iotlb_reset(vdpasim->iommu);
@@ -508,7 +512,9 @@ static u32 vdpasim_get_vq_align(struct vdpa_device *vdpa) 


static u64 vdpasim_get_features(struct vdpa_device *vdpa)

{

	return vdpasim_features;

	struct vdpasim *vdpasim = vdpa_to_sim(vdpa);



	return vdpasim->dev_attr.supported_features;

}



static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features)
@@ -520,7 +526,7 @@ static int vdpasim_set_features(struct vdpa_device *vdpa, u64 features) 
	if (!(features & (1ULL << VIRTIO_F_ACCESS_PLATFORM)))

		return -EINVAL;



	vdpasim->features = features & vdpasim_features;

	vdpasim->features = features & vdpasim->dev_attr.supported_features;



	/* We generally only know whether guest is using the legacy interface

	 * here, so generally that's the earliest we can set config fields.
@@ -732,6 +738,7 @@ static int __init vdpasim_dev_init(void) 
	struct vdpasim_dev_attr dev_attr = {};



	dev_attr.id = VIRTIO_ID_NET;

	dev_attr.supported_features = VDPASIM_NET_FEATURES;

	dev_attr.nvqs = VDPASIM_VQ_NUM;



	vdpasim_dev = vdpasim_create(&dev_attr);

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