[Qemu-devel] [RESEND Patch v1 12/37] vhost-pci-slave/msg: VHOST_USER_SET_DEVICE_ID

[Wei Wang]

Initialize the feature bits according to the device type.

Signed-off-by: Wei Wang <address@hidden>
---
 hw/virtio/vhost-pci-slave.c         | 23 +++++++++++++++++++++++
 include/hw/virtio/vhost-pci-slave.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/hw/virtio/vhost-pci-slave.c b/hw/virtio/vhost-pci-slave.c
index 020e279..3f35649 100644
--- a/hw/virtio/vhost-pci-slave.c
+++ b/hw/virtio/vhost-pci-slave.c
@@ -18,6 +18,12 @@
 #include "hw/virtio/vhost-pci-slave.h"
 #include "hw/virtio/vhost-user.h"
 
+#define VHOST_PCI_FEATURE_BITS (1ULL << VIRTIO_F_VERSION_1)
+
+#define VHOST_PCI_NET_FEATURE_BITS ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \
+                                   (1ULL << VIRTIO_NET_F_CTRL_VQ) | \
+                                   (1ULL << VIRTIO_NET_F_MQ))
+
 VhostPCISlave *vp_slave;
 
 static int vp_slave_write(CharBackend *chr_be, VhostUserMsg *msg)
@@ -72,6 +78,20 @@ static int vp_slave_get_protocol_features(CharBackend 
*chr_be,
     return vp_slave_write(chr_be, msg);
 }
 
+static void vp_slave_set_device_type(VhostUserMsg *msg)
+{
+    vp_slave->dev_type = (uint16_t)msg->payload.u64;
+
+    switch (vp_slave->dev_type) {
+    case VIRTIO_ID_NET:
+        vp_slave->feature_bits |= (VHOST_PCI_FEATURE_BITS
+                                   | VHOST_PCI_NET_FEATURE_BITS);
+        break;
+    default:
+        error_report("device type %d is not supported", vp_slave->dev_type);
+    }
+}
+
 static int vp_slave_can_read(void *opaque)
 {
     return VHOST_USER_HDR_SIZE;
@@ -123,6 +143,9 @@ static void vp_slave_read(void *opaque, const uint8_t *buf, 
int size)
         break;
     case VHOST_USER_SET_PROTOCOL_FEATURES:
         break;
+    case VHOST_USER_SET_DEVICE_ID:
+        vp_slave_set_device_type(&msg);
+        break;
     default:
         error_report("vhost-pci-slave does not support msg request = %d",
                      msg.request);
diff --git a/include/hw/virtio/vhost-pci-slave.h 
b/include/hw/virtio/vhost-pci-slave.h
index 4ec25d4..8b162dc 100644
--- a/include/hw/virtio/vhost-pci-slave.h
+++ b/include/hw/virtio/vhost-pci-slave.h
@@ -5,6 +5,7 @@
 
 typedef struct VhostPCISlave {
     CharBackend chr_be;
+    uint16_t dev_type;
     uint64_t feature_bits;
 } VhostPCISlave;
 
-- 
2.7.4