| Message ID | 1592684486-18511-7-git-send-email-kwankhede@nvidia.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add migration support for VFIO devices | expand |
On Sun, 21 Jun 2020 01:51:15 +0530 Kirti Wankhede <kwankhede@nvidia.com> wrote: > 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> > --- > hw/vfio/migration.c | 29 +++++++++++++++++++++++++++++ > hw/vfio/trace-events | 5 +++-- > include/hw/vfio/vfio-common.h | 1 + > 3 files changed, 33 insertions(+), 2 deletions(-) > > diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c > index fcecc0bb0874..e30bd8768701 100644 > --- a/hw/vfio/migration.c > +++ b/hw/vfio/migration.c > @@ -154,6 +154,28 @@ static void vfio_vmstate_change(void *opaque, int running, RunState state) > } > } > > +static void vfio_migration_state_notifier(Notifier *notifier, void *data) > +{ > + MigrationState *s = data; > + VFIODevice *vbasedev = container_of(notifier, VFIODevice, migration_state); > + 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); Also see https://lore.kernel.org/qemu-devel/20200505124639.56531df8.cohuck@redhat.com/. > + } > + } > +} > + > static int vfio_migration_init(VFIODevice *vbasedev, > struct vfio_region_info *info) > {
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index fcecc0bb0874..e30bd8768701 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -154,6 +154,28 @@ static void vfio_vmstate_change(void *opaque, int running, RunState state) } } +static void vfio_migration_state_notifier(Notifier *notifier, void *data) +{ + MigrationState *s = data; + VFIODevice *vbasedev = container_of(notifier, VFIODevice, migration_state); + 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 int vfio_migration_init(VFIODevice *vbasedev, struct vfio_region_info *info) { @@ -172,6 +194,8 @@ static int vfio_migration_init(VFIODevice *vbasedev, vbasedev->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change, vbasedev); + vbasedev->migration_state.notify = vfio_migration_state_notifier; + add_migration_state_change_notifier(&vbasedev->migration_state); return ret; } @@ -214,6 +238,11 @@ add_blocker: void vfio_migration_finalize(VFIODevice *vbasedev) { + + if (vbasedev->migration_state.notify) { + remove_migration_state_change_notifier(&vbasedev->migration_state); + } + if (vbasedev->vm_state) { qemu_del_vm_change_state_handler(vbasedev->vm_state); } diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index 14b0a86c0035..bd3d47b005cb 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -146,5 +146,6 @@ vfio_display_edid_write_error(void) "" # migration.c vfio_migration_probe(const char *name, uint32_t index) " (%s) Region %d" -vfio_migration_set_state(char *name, uint32_t state) " (%s) state %d" -vfio_vmstate_change(char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %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" diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 3d18eb146b33..28f55f66d019 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -123,6 +123,7 @@ typedef struct VFIODevice { VMChangeStateEntry *vm_state; uint32_t device_state; int vm_running; + Notifier migration_state; } VFIODevice; struct VFIODeviceOps {