[Qemu-devel] [RFC v10 16/19] vfio: do hot bus reset when do virtual secondary bus reset

[Chen Fan]

when do virtual secondary bus reset, the vfio device under
this bus need to do host bus reset to reset the device.
so add this case.

Signed-off-by: Chen Fan <address@hidden>
---
 hw/vfio/pci.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index a86edab..5bdfa73 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -4246,6 +4246,15 @@ static void vfio_pci_reset(DeviceState *dev)
 
     trace_vfio_pci_reset(vdev->vbasedev.name);
 
+    if (vdev->needs_bus_reset) {
+        vdev->needs_bus_reset = false;
+        /* Avoid duplicate bus reset */
+        if (vdev->vbasedev.needs_reset) {
+            vfio_pci_hot_reset(vdev, false);
+        }
+        return;
+    }
+
     vfio_pci_pre_reset(vdev);
 
     if (vdev->resetfn && !vdev->resetfn(vdev)) {
-- 
1.9.3