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| author | Jason Wang <jasowang@redhat.com> | 2020-03-26 15:01:18 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-04-01 18:06:26 +0200 |
| commit | 792a4f2ed24fcdf0a1956e84fe2a71ada318ba7c (patch) | |
| tree | 2e6c428495030f0118f14468fc2cdf7f6e649b29 /drivers/vhost/vhost.c | |
| parent | vhost: refine vhost and vringh kconfig (diff) | |
| download | linux-792a4f2ed24fcdf0a1956e84fe2a71ada318ba7c.tar.xz linux-792a4f2ed24fcdf0a1956e84fe2a71ada318ba7c.zip | |
vhost: allow per device message handler
This patch allow device to register its own message handler during
vhost_dev_init(). vDPA device will use it to implement its own DMA
mapping logic.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200326140125.19794-3-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost/vhost.c')
| -rw-r--r-- | drivers/vhost/vhost.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index f44340b41494..8e9e2341e40a 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -457,7 +457,9 @@ static size_t vhost_get_desc_size(struct vhost_virtqueue *vq, void vhost_dev_init(struct vhost_dev *dev, struct vhost_virtqueue **vqs, int nvqs, - int iov_limit, int weight, int byte_weight) + int iov_limit, int weight, int byte_weight, + int (*msg_handler)(struct vhost_dev *dev, + struct vhost_iotlb_msg *msg)) { struct vhost_virtqueue *vq; int i; @@ -473,6 +475,7 @@ void vhost_dev_init(struct vhost_dev *dev, dev->iov_limit = iov_limit; dev->weight = weight; dev->byte_weight = byte_weight; + dev->msg_handler = msg_handler; init_llist_head(&dev->work_list); init_waitqueue_head(&dev->wait); INIT_LIST_HEAD(&dev->read_list); @@ -1178,7 +1181,12 @@ ssize_t vhost_chr_write_iter(struct vhost_dev *dev, ret = -EINVAL; goto done; } - if (vhost_process_iotlb_msg(dev, &msg)) { + + if (dev->msg_handler) + ret = dev->msg_handler(dev, &msg); + else + ret = vhost_process_iotlb_msg(dev, &msg); + if (ret) { ret = -EFAULT; goto done; } |