vhost: support IOTLB miss slave requests

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 0ba66e1..628da2d 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -1168,3 +1168,29 @@ vhost_user_msg_handler(int vid, int fd)
 
        return 0;
 }
+
+int
+vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm)
+{
+       int ret;
+       struct VhostUserMsg msg = {
+               .request = (enum VhostUserRequest)VHOST_USER_SLAVE_IOTLB_MSG,
+               .flags = VHOST_USER_VERSION,
+               .size = sizeof(msg.payload.iotlb),
+               .payload.iotlb = {
+                       .iova = iova,
+                       .perm = perm,
+                       .type = VHOST_IOTLB_MISS,
+               },
+       };
+
+       ret = send_vhost_message(dev->slave_req_fd, &msg);
+       if (ret < 0) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                               "Failed to send IOTLB miss message (%d)\n",
+                               ret);
+               return ret;
+       }
+
+       return 0;
+}

diff --git a/lib/librte_vhost/vhost_user.h b/lib/librte_vhost/vhost_user.h
index 98f6e6f..0b2aff1 100644 (file)
--- a/lib/librte_vhost/vhost_user.h
+++ b/lib/librte_vhost/vhost_user.h
@@ -85,6 +85,7 @@ typedef enum VhostUserRequest {
 
 typedef enum VhostUserSlaveRequest {
        VHOST_USER_SLAVE_NONE = 0,
+       VHOST_USER_SLAVE_IOTLB_MSG = 1,
        VHOST_USER_SLAVE_MAX
 } VhostUserSlaveRequest;
 
@@ -122,6 +123,7 @@ typedef struct VhostUserMsg {
                struct vhost_vring_addr addr;
                VhostUserMemory memory;
                VhostUserLog    log;
+               struct vhost_iotlb_msg iotlb;
        } payload;
        int fds[VHOST_MEMORY_MAX_NREGIONS];
 } __attribute((packed)) VhostUserMsg;
@@ -134,6 +136,7 @@ typedef struct VhostUserMsg {
 
 /* vhost_user.c */
 int vhost_user_msg_handler(int vid, int fd);
+int vhost_user_iotlb_miss(struct virtio_net *dev, uint64_t iova, uint8_t perm);
 
 /* socket.c */
 int read_fd_message(int sockfd, char *buf, int buflen, int *fds, int fd_num);