util/vfio-helpers: Convert vfio_dump_mapping to trace events

The QEMU_VFIO_DEBUG definition is only modifiable at build-time.
Trace events can be enabled at run-time. As we prefer the latter,
convert qemu_vfio_dump_mappings() to use trace events instead
of fprintf().

Reviewed-by: Fam Zheng <fam@euphon.net>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20201103020733.2303148-7-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>

diff --git a/util/trace-events b/util/trace-events
index 0823994..61e0d4b 100644 (file)
--- a/util/trace-events
+++ b/util/trace-events
@@ -80,6 +80,7 @@ qemu_mutex_unlock(void *mutex, const char *file, const int line) "released mutex
 qemu_vfio_dma_reset_temporary(void *s) "s %p"
 qemu_vfio_ram_block_added(void *s, void *p, size_t size) "s %p host %p size 0x%zx"
 qemu_vfio_ram_block_removed(void *s, void *p, size_t size) "s %p host %p size 0x%zx"
+qemu_vfio_dump_mapping(void *host, uint64_t iova, size_t size) "vfio mapping %p to iova 0x%08" PRIx64 " size 0x%zx"
 qemu_vfio_find_mapping(void *s, void *p) "s %p host %p"
 qemu_vfio_new_mapping(void *s, void *host, size_t size, int index, uint64_t iova) "s %p host %p size 0x%zx index %d iova 0x%"PRIx64
 qemu_vfio_do_mapping(void *s, void *host, uint64_t iova, size_t size) "s %p host %p <-> iova 0x%"PRIx64 " size 0x%zx"

diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c
index c24a510..73f7bfa 100644 (file)
--- a/util/vfio-helpers.c
+++ b/util/vfio-helpers.c
@@ -521,23 +521,12 @@ QEMUVFIOState *qemu_vfio_open_pci(const char *device, Error **errp)
     return s;
 }
 
-static void qemu_vfio_dump_mapping(IOVAMapping *m)
-{
-    if (QEMU_VFIO_DEBUG) {
-        printf("  vfio mapping %p %" PRIx64 " to %" PRIx64 "\n", m->host,
-               (uint64_t)m->size, (uint64_t)m->iova);
-    }
-}
-
 static void qemu_vfio_dump_mappings(QEMUVFIOState *s)
 {
-    int i;
-
-    if (QEMU_VFIO_DEBUG) {
-        printf("vfio mappings\n");
-        for (i = 0; i < s->nr_mappings; ++i) {
-            qemu_vfio_dump_mapping(&s->mappings[i]);
-        }
+    for (int i = 0; i < s->nr_mappings; ++i) {
+        trace_qemu_vfio_dump_mapping(s->mappings[i].host,
+                                     s->mappings[i].iova,
+                                     s->mappings[i].size);
     }
 }