vhost: vdpa: remove per device feature whitelist
We used to have a per device feature whitelist to filter out the
unsupported virtio features. But this seems unnecessary since:
- the main idea behind feature whitelist is to block control vq
feature until we finalize the control virtqueue API. But the current
vhost-vDPA uAPI is sufficient to support control virtqueue. For
device that has hardware control virtqueue, the vDPA device driver
can just setup the hardware virtqueue and let userspace to use
hardware virtqueue directly. For device that doesn't have a control
virtqueue, the vDPA device driver need to use e.g vringh to emulate
a software control virtqueue.
- we don't do it in virtio-vDPA driver
So remove this limitation.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200720085043.16485-1-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 3674404..210f213 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -26,35 +26,6 @@
#include "vhost.h"
-enum {
- VHOST_VDPA_FEATURES =
- (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) |
- (1ULL << VIRTIO_F_ANY_LAYOUT) |
- (1ULL << VIRTIO_F_VERSION_1) |
- (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
- (1ULL << VIRTIO_F_RING_PACKED) |
- (1ULL << VIRTIO_F_ORDER_PLATFORM) |
- (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
- (1ULL << VIRTIO_RING_F_EVENT_IDX),
-
- VHOST_VDPA_NET_FEATURES = VHOST_VDPA_FEATURES |
- (1ULL << VIRTIO_NET_F_CSUM) |
- (1ULL << VIRTIO_NET_F_GUEST_CSUM) |
- (1ULL << VIRTIO_NET_F_MTU) |
- (1ULL << VIRTIO_NET_F_MAC) |
- (1ULL << VIRTIO_NET_F_GUEST_TSO4) |
- (1ULL << VIRTIO_NET_F_GUEST_TSO6) |
- (1ULL << VIRTIO_NET_F_GUEST_ECN) |
- (1ULL << VIRTIO_NET_F_GUEST_UFO) |
- (1ULL << VIRTIO_NET_F_HOST_TSO4) |
- (1ULL << VIRTIO_NET_F_HOST_TSO6) |
- (1ULL << VIRTIO_NET_F_HOST_ECN) |
- (1ULL << VIRTIO_NET_F_HOST_UFO) |
- (1ULL << VIRTIO_NET_F_MRG_RXBUF) |
- (1ULL << VIRTIO_NET_F_STATUS) |
- (1ULL << VIRTIO_NET_F_SPEED_DUPLEX),
-};
-
/* Currently, only network backend w/o multiqueue is supported. */
#define VHOST_VDPA_VQ_MAX 2
@@ -79,10 +50,6 @@ static DEFINE_IDA(vhost_vdpa_ida);
static dev_t vhost_vdpa_major;
-static const u64 vhost_vdpa_features[] = {
- [VIRTIO_ID_NET] = VHOST_VDPA_NET_FEATURES,
-};
-
static void handle_vq_kick(struct vhost_work *work)
{
struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
@@ -253,7 +220,6 @@ static long vhost_vdpa_get_features(struct vhost_vdpa *v, u64 __user *featurep)
u64 features;
features = ops->get_features(vdpa);
- features &= vhost_vdpa_features[v->virtio_id];
if (copy_to_user(featurep, &features, sizeof(features)))
return -EFAULT;
@@ -277,9 +243,6 @@ static long vhost_vdpa_set_features(struct vhost_vdpa *v, u64 __user *featurep)
if (copy_from_user(&features, featurep, sizeof(features)))
return -EFAULT;
- if (features & ~vhost_vdpa_features[v->virtio_id])
- return -EINVAL;
-
if (vdpa_set_features(vdpa, features))
return -EINVAL;