diff options
Diffstat (limited to 'hw/vfio/migration.c')
| -rw-r--r-- | hw/vfio/migration.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 992dc3b102..01aa11013e 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -370,6 +370,10 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) * please refer to the Linux kernel VFIO uAPI. */ if (errno == ENOMSG) { + if (!migration->event_precopy_empty_hit) { + trace_vfio_save_block_precopy_empty_hit(migration->vbasedev->name); + migration->event_precopy_empty_hit = true; + } return 0; } @@ -379,6 +383,9 @@ static ssize_t vfio_save_block(QEMUFile *f, VFIOMigration *migration) return 0; } + /* Non-empty read: re-arm the trace event */ + migration->event_precopy_empty_hit = false; + qemu_put_be64(f, VFIO_MIG_FLAG_DEV_DATA_STATE); qemu_put_be64(f, data_size); qemu_put_buffer(f, migration->data_buffer, data_size); @@ -472,6 +479,9 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp) return -ENOMEM; } + migration->event_save_iterate_started = false; + migration->event_precopy_empty_hit = false; + if (vfio_precopy_supported(vbasedev)) { switch (migration->device_state) { case VFIO_DEVICE_STATE_RUNNING: @@ -602,6 +612,11 @@ static int vfio_save_iterate(QEMUFile *f, void *opaque) VFIOMigration *migration = vbasedev->migration; ssize_t data_size; + if (!migration->event_save_iterate_started) { + trace_vfio_save_iterate_start(vbasedev->name); + migration->event_save_iterate_started = true; + } + data_size = vfio_save_block(f, migration); if (data_size < 0) { return data_size; @@ -630,6 +645,8 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque) int ret; Error *local_err = NULL; + trace_vfio_save_complete_precopy_start(vbasedev->name); + /* We reach here with device state STOP or STOP_COPY only */ ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP_COPY, VFIO_DEVICE_STATE_STOP, &local_err); |