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: Max Gurtovoy <mgurto...@nvidia.com>
Signed-off-by: Max Gurtovoy <mgurto...@nvidia.com>
Acked-by: Jason Wang <jasow...@redhat.com>
Signed-off-by: Stefano Garzarella <sgarz...@redhat.com>
---
drivers/vdpa/vdpa_sim/vdpa_sim.c | 29 ++++++++++++++++++-----------
1 file changed, 18 insertions(+), 11 deletions(-)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 3d97bc709fb9..569c5213ee01 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -51,12 +51,15 @@ 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;
};
@@ -114,7 +117,7 @@ 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 *)
@@ -123,7 +126,8 @@ 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;
@@ -131,8 +135,8 @@ 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)
@@ -140,7 +144,7 @@ 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);
@@ -500,7 +504,9 @@ 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)
@@ -512,7 +518,7 @@ 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.
@@ -724,6 +730,7 @@ 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);
--
2.26.2
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