mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vfio/migration: Add vfio_save_block_precopy_empty_hit trace event

Browse Source 
This way it is clearly known when there's no more data to send for that
device.

Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
This commit is contained in:
Maciej S. Szmigiero 2024-11-04 22:29:07 +01:00 committed by Cédric Le Goater
parent 2564e45171
commit 89b5161527
3 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
hw/vfio/migration.c
View File

@ -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);
@ -473,6 +480,7 @@ static int vfio_save_setup(QEMUFile *f, void *opaque, Error **errp)
}
migration->event_save_iterate_started = false;
migration->event_precopy_empty_hit = false;
if (vfio_precopy_supported(vbasedev)) {
switch (migration->device_state) {

1
hw/vfio/trace-events
View File

@ -157,6 +157,7 @@ vfio_migration_set_device_state(const char *name, const char *state) " (%s) stat
vfio_migration_set_state(const char *name, const char *new_state, const char *recover_state) " (%s) new state %s, recover state %s"
vfio_migration_state_notifier(const char *name, int state) " (%s) state %d"
vfio_save_block(const char *name, int data_size) " (%s) data_size %d"
vfio_save_block_precopy_empty_hit(const char *name) " (%s)"
vfio_save_cleanup(const char *name) " (%s)"
vfio_save_complete_precopy(const char *name, int ret) " (%s) ret %d"
vfio_save_complete_precopy_start(const char *name) " (%s)"

1
include/hw/vfio/vfio-common.h
View File

@ -75,6 +75,7 @@ typedef struct VFIOMigration {
bool initial_data_sent;
bool event_save_iterate_started;
bool event_precopy_empty_hit;
} VFIOMigration;
struct VFIOGroup;