[PATCH v3 2/5] vfio/pci: Add an error handler callback

[Farhan Ali <alifm@linux.ibm.com>]

Provide a vfio error handling callback, that can be used by devices to
handle PCI errors for passthrough devices.

Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
---
 hw/vfio/pci.c | 8 ++++++++
 hw/vfio/pci.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index bc0b4c4d56..b02a974954 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -3063,11 +3063,19 @@ void vfio_pci_put_device(VFIOPCIDevice *vdev)
 static void vfio_err_notifier_handler(void *opaque)
 {
     VFIOPCIDevice *vdev = opaque;
+    Error *err = NULL;
 
     if (!event_notifier_test_and_clear(&vdev->err_notifier)) {
         return;
     }
 
+    if (vdev->err_handler) {
+        if (vdev->err_handler(vdev, &err)) {
+            return;
+        }
+        error_report_err(err);
+    }
+
     /*
      * TBD. Retrieve the error details and decide what action
      * needs to be taken. One of the actions could be to pass
diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
index e0aef82a89..faadce487c 100644
--- a/hw/vfio/pci.h
+++ b/hw/vfio/pci.h
@@ -146,6 +146,7 @@ struct VFIOPCIDevice {
     EventNotifier err_notifier;
     EventNotifier req_notifier;
     int (*resetfn)(struct VFIOPCIDevice *);
+    bool (*err_handler)(struct VFIOPCIDevice *, Error **);
     uint32_t vendor_id;
     uint32_t device_id;
     uint32_t sub_vendor_id;
-- 
2.43.0