[PATCH v8 23/28] vfio-user: implement VFIO_USER_DEVICE_RESET

[John Levon]

From: Jagannathan Raman <jag.ra...@oracle.com>

Hook this call up to the legacy reset handler for vfio-user-pci.

Originally-by: John Johnson <john.g.john...@oracle.com>
Signed-off-by: Elena Ufimtseva <elena.ufimts...@oracle.com>
Signed-off-by: Jagannathan Raman <jag.ra...@oracle.com>
Signed-off-by: John Levon <john.le...@nutanix.com>
---
 hw/vfio-user/common.c | 12 ++++++++++++
 hw/vfio-user/common.h |  1 +
 hw/vfio-user/pci.c    | 15 +++++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/hw/vfio-user/common.c b/hw/vfio-user/common.c
index 182ef5ab8f..160a1f0536 100644
--- a/hw/vfio-user/common.c
+++ b/hw/vfio-user/common.c
@@ -1362,6 +1362,18 @@ static int vfio_user_region_write(VFIOUserProxy *proxy, 
uint8_t index,
     return ret;
 }
 
+void vfio_user_reset(VFIOUserProxy *proxy)
+{
+    VFIOUserHdr msg;
+
+    vfio_user_request_msg(&msg, VFIO_USER_DEVICE_RESET, sizeof(msg), 0);
+
+    vfio_user_send_wait(proxy, &msg, NULL, 0);
+    if (msg.flags & VFIO_USER_ERROR) {
+        error_printf("reset reply error %d\n", msg.error_reply);
+    }
+}
+
 
 /*
  * Socket-based io_ops
diff --git a/hw/vfio-user/common.h b/hw/vfio-user/common.h
index 31b11ed614..c09637dd48 100644
--- a/hw/vfio-user/common.h
+++ b/hw/vfio-user/common.h
@@ -95,6 +95,7 @@ void vfio_user_set_handler(VFIODevice *vbasedev,
                            void *reqarg);
 bool vfio_user_validate_version(VFIOUserProxy *proxy, Error **errp);
 int vfio_user_get_info(VFIOUserProxy *proxy, struct vfio_device_info *info);
+void vfio_user_reset(VFIOUserProxy *proxy);
 
 extern VFIODeviceIO vfio_dev_io_sock;
 
diff --git a/hw/vfio-user/pci.c b/hw/vfio-user/pci.c
index cf1e642399..d520b7592b 100644
--- a/hw/vfio-user/pci.c
+++ b/hw/vfio-user/pci.c
@@ -276,6 +276,20 @@ static void vfio_user_instance_finalize(Object *obj)
     }
 }
 
+static void vfio_user_pci_reset(DeviceState *dev)
+{
+    VFIOPCIDevice *vdev = VFIO_PCI_BASE(dev);
+    VFIODevice *vbasedev = &vdev->vbasedev;
+
+    vfio_pci_pre_reset(vdev);
+
+    if (vbasedev->reset_works) {
+        vfio_user_reset(vbasedev->proxy);
+    }
+
+    vfio_pci_post_reset(vdev);
+}
+
 static const Property vfio_user_pci_dev_properties[] = {
     DEFINE_PROP_STRING("socket", VFIOUserPCIDevice, sock_name),
     DEFINE_PROP_BOOL("x-send-queued", VFIOUserPCIDevice, send_queued, false),
@@ -287,6 +301,7 @@ static void vfio_user_pci_dev_class_init(ObjectClass 
*klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(klass);
 
+    device_class_set_legacy_reset(dc, vfio_user_pci_reset);
     device_class_set_props(dc, vfio_user_pci_dev_properties);
     dc->desc = "VFIO over socket PCI device assignment";
     pdc->realize = vfio_user_pci_realize;
-- 
2.34.1