vhost-vdpa: add support for config interrupt

Add new call back function in vhost-vdpa, The function
vhost_set_config_call can set the event fd to kernel.
This function will be called in the vhost_dev_start
and vhost_dev_stop

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-6-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 96da58a41f0c99cf5fcaf2bf73e2d2629d1d01f5..a87c5f39a2f6b1602664a7883fb49ff009d9e8d6 100644 (file)
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -62,6 +62,7 @@ vhost_vdpa_get_features(void *dev, uint64_t features) "dev: %p features: 0x%"PRI
 vhost_vdpa_set_owner(void *dev) "dev: %p"
 vhost_vdpa_vq_get_addr(void *dev, void *vq, uint64_t desc_user_addr, uint64_t avail_user_addr, uint64_t used_user_addr) "dev: %p vq: %p desc_user_addr: 0x%"PRIx64" avail_user_addr: 0x%"PRIx64" used_user_addr: 0x%"PRIx64
 vhost_vdpa_get_iova_range(void *dev, uint64_t first, uint64_t last) "dev: %p first: 0x%"PRIx64" last: 0x%"PRIx64
+vhost_vdpa_set_config_call(void *dev, int fd)"dev: %p fd: %d"
 
 # virtio.c
 virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned out_num) "elem %p size %zd in_num %u out_num %u"

diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index fd0c33b0e1502c571d58d6d9f6ad0886ba4188d3..fcb1e96316098328b928a55b4d815c210a144a68 100644 (file)
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -716,6 +716,13 @@ static int vhost_vdpa_set_vring_ready(struct vhost_dev *dev)
     return 0;
 }
 
+static int vhost_vdpa_set_config_call(struct vhost_dev *dev,
+                                       int fd)
+{
+    trace_vhost_vdpa_set_config_call(dev, fd);
+    return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, &fd);
+}
+
 static void vhost_vdpa_dump_config(struct vhost_dev *dev, const uint8_t *config,
                                    uint32_t config_len)
 {
@@ -1298,4 +1305,5 @@ const VhostOps vdpa_ops = {
         .vhost_get_device_id = vhost_vdpa_get_device_id,
         .vhost_vq_get_addr = vhost_vdpa_vq_get_addr,
         .vhost_force_iommu = vhost_vdpa_force_iommu,
+        .vhost_set_config_call = vhost_vdpa_set_config_call,
 };