1 files changed, 145 insertions, 2 deletions

diff --git a/qemu/hw/virtio/vhost-backend.c b/qemu/hw/virtio/vhost-backend.c
index 4d68a2765..b35890289 100644
--- a/qemu/hw/virtio/vhost-backend.c
+++ b/qemu/hw/virtio/vhost-backend.c
@@ -8,9 +8,11 @@
  *
  */
 
+#include "qemu/osdep.h"
 #include "hw/virtio/vhost.h"
 #include "hw/virtio/vhost-backend.h"
 #include "qemu/error-report.h"
+#include "linux/vhost.h"
 
 #include <sys/ioctl.h>
 
@@ -42,11 +44,152 @@ static int vhost_kernel_cleanup(struct vhost_dev *dev)
     return close(fd);
 }
 
+static int vhost_kernel_memslots_limit(struct vhost_dev *dev)
+{
+    int limit = 64;
+    char *s;
+
+    if (g_file_get_contents("/sys/module/vhost/parameters/max_mem_regions",
+                            &s, NULL, NULL)) {
+        uint64_t val = g_ascii_strtoull(s, NULL, 10);
+        if (!((val == G_MAXUINT64 || !val) && errno)) {
+            return val;
+        }
+        error_report("ignoring invalid max_mem_regions value in vhost module:"
+                     " %s", s);
+    }
+    return limit;
+}
+
+static int vhost_kernel_net_set_backend(struct vhost_dev *dev,
+                                        struct vhost_vring_file *file)
+{
+    return vhost_kernel_call(dev, VHOST_NET_SET_BACKEND, file);
+}
+
+static int vhost_kernel_scsi_set_endpoint(struct vhost_dev *dev,
+                                          struct vhost_scsi_target *target)
+{
+    return vhost_kernel_call(dev, VHOST_SCSI_SET_ENDPOINT, target);
+}
+
+static int vhost_kernel_scsi_clear_endpoint(struct vhost_dev *dev,
+                                            struct vhost_scsi_target *target)
+{
+    return vhost_kernel_call(dev, VHOST_SCSI_CLEAR_ENDPOINT, target);
+}
+
+static int vhost_kernel_scsi_get_abi_version(struct vhost_dev *dev, int *version)
+{
+    return vhost_kernel_call(dev, VHOST_SCSI_GET_ABI_VERSION, version);
+}
+
+static int vhost_kernel_set_log_base(struct vhost_dev *dev, uint64_t base,
+                                     struct vhost_log *log)
+{
+    return vhost_kernel_call(dev, VHOST_SET_LOG_BASE, &base);
+}
+
+static int vhost_kernel_set_mem_table(struct vhost_dev *dev,
+                                      struct vhost_memory *mem)
+{
+    return vhost_kernel_call(dev, VHOST_SET_MEM_TABLE, mem);
+}
+
+static int vhost_kernel_set_vring_addr(struct vhost_dev *dev,
+                                       struct vhost_vring_addr *addr)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_ADDR, addr);
+}
+
+static int vhost_kernel_set_vring_endian(struct vhost_dev *dev,
+                                         struct vhost_vring_state *ring)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_ENDIAN, ring);
+}
+
+static int vhost_kernel_set_vring_num(struct vhost_dev *dev,
+                                      struct vhost_vring_state *ring)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_NUM, ring);
+}
+
+static int vhost_kernel_set_vring_base(struct vhost_dev *dev,
+                                       struct vhost_vring_state *ring)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_BASE, ring);
+}
+
+static int vhost_kernel_get_vring_base(struct vhost_dev *dev,
+                                       struct vhost_vring_state *ring)
+{
+    return vhost_kernel_call(dev, VHOST_GET_VRING_BASE, ring);
+}
+
+static int vhost_kernel_set_vring_kick(struct vhost_dev *dev,
+                                       struct vhost_vring_file *file)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_KICK, file);
+}
+
+static int vhost_kernel_set_vring_call(struct vhost_dev *dev,
+                                       struct vhost_vring_file *file)
+{
+    return vhost_kernel_call(dev, VHOST_SET_VRING_CALL, file);
+}
+
+static int vhost_kernel_set_features(struct vhost_dev *dev,
+                                     uint64_t features)
+{
+    return vhost_kernel_call(dev, VHOST_SET_FEATURES, &features);
+}
+
+static int vhost_kernel_get_features(struct vhost_dev *dev,
+                                     uint64_t *features)
+{
+    return vhost_kernel_call(dev, VHOST_GET_FEATURES, features);
+}
+
+static int vhost_kernel_set_owner(struct vhost_dev *dev)
+{
+    return vhost_kernel_call(dev, VHOST_SET_OWNER, NULL);
+}
+
+static int vhost_kernel_reset_device(struct vhost_dev *dev)
+{
+    return vhost_kernel_call(dev, VHOST_RESET_OWNER, NULL);
+}
+
+static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx)
+{
+    assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs);
+
+    return idx - dev->vq_index;
+}
+
 static const VhostOps kernel_ops = {
         .backend_type = VHOST_BACKEND_TYPE_KERNEL,
-        .vhost_call = vhost_kernel_call,
         .vhost_backend_init = vhost_kernel_init,
-        .vhost_backend_cleanup = vhost_kernel_cleanup
+        .vhost_backend_cleanup = vhost_kernel_cleanup,
+        .vhost_backend_memslots_limit = vhost_kernel_memslots_limit,
+        .vhost_net_set_backend = vhost_kernel_net_set_backend,
+        .vhost_scsi_set_endpoint = vhost_kernel_scsi_set_endpoint,
+        .vhost_scsi_clear_endpoint = vhost_kernel_scsi_clear_endpoint,
+        .vhost_scsi_get_abi_version = vhost_kernel_scsi_get_abi_version,
+        .vhost_set_log_base = vhost_kernel_set_log_base,
+        .vhost_set_mem_table = vhost_kernel_set_mem_table,
+        .vhost_set_vring_addr = vhost_kernel_set_vring_addr,
+        .vhost_set_vring_endian = vhost_kernel_set_vring_endian,
+        .vhost_set_vring_num = vhost_kernel_set_vring_num,
+        .vhost_set_vring_base = vhost_kernel_set_vring_base,
+        .vhost_get_vring_base = vhost_kernel_get_vring_base,
+        .vhost_set_vring_kick = vhost_kernel_set_vring_kick,
+        .vhost_set_vring_call = vhost_kernel_set_vring_call,
+        .vhost_set_features = vhost_kernel_set_features,
+        .vhost_get_features = vhost_kernel_get_features,
+        .vhost_set_owner = vhost_kernel_set_owner,
+        .vhost_reset_device = vhost_kernel_reset_device,
+        .vhost_get_vq_index = vhost_kernel_get_vq_index,
 };
 
 int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type)