vfio: Move vfio_reset_handler() into device.c

Pass-through devices of a VM are not necessarily in the same group and
all groups/address_spaces need to be scanned when the machine is
reset. Commit f16f39c3fc97 ("Implement PCI hot reset") introduced a VM
reset handler for this purpose. Move it under device.c

Also reintroduce the comment which explained the context and was lost
along the way.

Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: John Levon <john.levon@nutanix.com>
Link: https://lore.kernel.org/qemu-devel/20250326075122.1299361-26-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index a85ed36409..45ac8b7d8b 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -1300,21 +1300,3 @@ const MemoryListener vfio_memory_listener = {
     .log_global_stop = vfio_listener_log_global_stop,
     .log_sync = vfio_listener_log_sync,
 };
-
-void vfio_reset_handler(void *opaque)
-{
-    VFIODevice *vbasedev;
-
-    trace_vfio_reset_handler();
-    QLIST_FOREACH(vbasedev, &vfio_device_list, global_next) {
-        if (vbasedev->dev->realized) {
-            vbasedev->ops->vfio_compute_needs_reset(vbasedev);
-        }
-    }
-
-    QLIST_FOREACH(vbasedev, &vfio_device_list, global_next) {
-        if (vbasedev->dev->realized && vbasedev->needs_reset) {
-            vbasedev->ops->vfio_hot_reset_multi(vbasedev);
-        }
-    }
-}