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vfio: Add migration state change notifier

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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 {