vfio: Introduce new files for VFIO MemoryListener

File "common.c" has been emptied of most of its definitions by the
previous changes and the only definitions left are related to the VFIO
MemoryListener handlers. Rename it to "listener.c" and introduce its
associated "vfio-listener.h" header file for the declarations.

Cleanup a little the includes while at it.

Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: John Levon <john.levon@nutanix.com>
Reviewed-by: Avihai Horon <avihaih@nvidia.com>
Link: https://lore.kernel.org/qemu-devel/20250326075122.1299361-33-clg@redhat.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>

7 files changed, 18 insertions, 3 deletions

diff --git a/hw/vfio/container.c b/hw/vfio/container.c
index bb3990a..ff540e1 100644
--- a/hw/vfio/container.c
+++ b/hw/vfio/container.c
@@ -35,6 +35,7 @@
 #include "hw/vfio/vfio-container.h"
 #include "vfio-helpers.h"
 #include "vfio-cpr.h"
+#include "vfio-listener.h"
 
 #define TYPE_HOST_IOMMU_DEVICE_LEGACY_VFIO TYPE_HOST_IOMMU_DEVICE "-legacy-vfio"
 
diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index a5bd189..7488d21 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -28,6 +28,7 @@
 #include "vfio-iommufd.h"
 #include "vfio-helpers.h"
 #include "vfio-cpr.h"
+#include "vfio-listener.h"
 
 #define TYPE_HOST_IOMMU_DEVICE_IOMMUFD_VFIO             \
             TYPE_HOST_IOMMU_DEVICE_IOMMUFD "-vfio"
diff --git a/hw/vfio/common.c b/hw/vfio/listener.c
index bde1bb3..bde1bb3 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/listener.c
diff --git a/hw/vfio/meson.build b/hw/vfio/meson.build
index 9c8a989..bccb050 100644
--- a/hw/vfio/meson.build
+++ b/hw/vfio/meson.build
@@ -1,6 +1,6 @@
 vfio_ss = ss.source_set()
 vfio_ss.add(files(
-  'common.c',
+  'listener.c',
   'container-base.c',
   'container.c',
   'helpers.c',
diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
index aa0ba69..ddb1bcc 100644
--- a/hw/vfio/trace-events
+++ b/hw/vfio/trace-events
@@ -89,7 +89,7 @@ vfio_pci_igd_bdsm_enabled(const char *name, int size) "%s %dMB"
 vfio_pci_igd_host_bridge_enabled(const char *name) "%s"
 vfio_pci_igd_lpc_bridge_enabled(const char *name) "%s"
 
-# common.c
+# listener.c
 vfio_iommu_map_notify(const char *op, uint64_t iova_start, uint64_t iova_end) "iommu %s @ 0x%"PRIx64" - 0x%"PRIx64
 vfio_listener_region_skip(const char *name, uint64_t start, uint64_t end) "SKIPPING %s 0x%"PRIx64" - 0x%"PRIx64
 vfio_spapr_group_attach(int groupfd, int tablefd) "Attached groupfd %d to liobn fd %d"
diff --git a/hw/vfio/vfio-listener.h b/hw/vfio/vfio-listener.h
new file mode 100644
index 0000000..93af674
--- /dev/null
+++ b/hw/vfio/vfio-listener.h
@@ -0,0 +1,14 @@
+/*
+ * VFIO MemoryListener services
+ *
+ * Copyright Red Hat, Inc. 2025
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#ifndef HW_VFIO_VFIO_LISTENER_H
+#define HW_VFIO_VFIO_LISTENER_H
+
+extern const MemoryListener vfio_memory_listener;
+
+#endif /* HW_VFIO_VFIO_LISTENER_H */
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index 0dfae24..92381c6 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -131,7 +131,6 @@ VFIODevice *vfio_get_vfio_device(Object *obj);
 
 typedef QLIST_HEAD(VFIODeviceList, VFIODevice) VFIODeviceList;
 extern VFIODeviceList vfio_device_list;
-extern const MemoryListener vfio_memory_listener;
 
 #ifdef CONFIG_LINUX
 int vfio_get_region_info(VFIODevice *vbasedev, int index,