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vfio: Add migration state change notifier 

Added migration state change notifier to get notification on migration state
change. These states are translated to VFIO device state and conveyed to
vendor driver.

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Neo Jia <cjia@nvidia.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Kirti Wankhede 2020-10-26 15:06:16 +05:30 committed by Alex Williamson
parent 02a7e71b1e
commit 050c588c2e
3 changed files with 31 additions and 0 deletions
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28
hw/vfio/migration.c
View File

@ -175,6 +175,30 @@ static void vfio_vmstate_change(void *opaque, int running, RunState state)
(migration->device_state & mask) | value);
}
static void vfio_migration_state_notifier(Notifier *notifier, void *data)
{
MigrationState *s = data;
VFIOMigration *migration = container_of(notifier, VFIOMigration,
migration_state);
VFIODevice *vbasedev = migration->vbasedev;
int ret;
trace_vfio_migration_state_notifier(vbasedev->name,
MigrationStatus_str(s->state));
switch (s->state) {
case MIGRATION_STATUS_CANCELLING:
case MIGRATION_STATUS_CANCELLED:
case MIGRATION_STATUS_FAILED:
ret = vfio_migration_set_state(vbasedev,
~(VFIO_DEVICE_STATE_SAVING | VFIO_DEVICE_STATE_RESUMING),
VFIO_DEVICE_STATE_RUNNING);
if (ret) {
error_report("%s: Failed to set state RUNNING", vbasedev->name);
}
}
}
static void vfio_migration_exit(VFIODevice *vbasedev)
{
VFIOMigration *migration = vbasedev->migration;
@ -219,8 +243,11 @@ static int vfio_migration_init(VFIODevice *vbasedev,
}
migration = vbasedev->migration;
migration->vbasedev = vbasedev;
migration->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change,
vbasedev);
migration->migration_state.notify = vfio_migration_state_notifier;
add_migration_state_change_notifier(&migration->migration_state);
return 0;
err:
@ -270,6 +297,7 @@ void vfio_migration_finalize(VFIODevice *vbasedev)
if (vbasedev->migration) {
VFIOMigration *migration = vbasedev->migration;
remove_migration_state_change_notifier(&migration->migration_state);
qemu_del_vm_change_state_handler(migration->vm_state);
vfio_migration_exit(vbasedev);
}

1
hw/vfio/trace-events
View File

@ -150,3 +150,4 @@ vfio_display_edid_write_error(void) ""
vfio_migration_probe(const char *name, uint32_t index) " (%s) Region %d"
vfio_migration_set_state(const char *name, uint32_t state) " (%s) state %d"
vfio_vmstate_change(const char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d"
vfio_migration_state_notifier(const char *name, const char *state) " (%s) state %s"

2
include/hw/vfio/vfio-common.h
View File

@ -59,10 +59,12 @@ typedef struct VFIORegion {
} VFIORegion;
typedef struct VFIOMigration {
struct VFIODevice *vbasedev;
VMChangeStateEntry *vm_state;
VFIORegion region;
uint32_t device_state;
int vm_running;
Notifier migration_state;
} VFIOMigration;
typedef struct VFIOAddressSpace {