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| author | Michael S. Tsirkin <mst@redhat.com> | 2014-10-15 10:21:55 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2014-10-15 10:24:56 +1030 |
| commit | 22b7050a024d7deb0c9ef1e14ed73e3b1e369f24 (patch) | |
| tree | be21b9a75aa1b5a95d8bb3ab7bf9470669e643bb /include | |
| parent | c6716bae52f97347e25166c6270aa98693d9212c (diff) | |
| download | linux-22b7050a024d7deb0c9ef1e14ed73e3b1e369f24.tar.bz2 | |
virtio: defer config changed notifications
Defer config changed notifications that arrive during
probe/scan/freeze/restore.
This will allow drivers to set DRIVER_OK earlier, without worrying about
racing with config change interrupts.
This change will also benefit old hypervisors (before 2009)
that send interrupts without checking DRIVER_OK: previously,
the callback could race with driver-specific initialization.
This will also help simplify drivers.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (cosmetic changes)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 8df7ba81e5c7..65261a7244fc 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -79,6 +79,9 @@ bool virtqueue_is_broken(struct virtqueue *vq); * virtio_device - representation of a device using virtio * @index: unique position on the virtio bus * @failed: saved value for CONFIG_S_FAILED bit (for restore) + * @config_enabled: configuration change reporting enabled + * @config_change_pending: configuration change reported while disabled + * @config_lock: protects configuration change reporting * @dev: underlying device. * @id: the device type identification (used to match it with a driver). * @config: the configuration ops for this device. @@ -90,6 +93,9 @@ bool virtqueue_is_broken(struct virtqueue *vq); struct virtio_device { int index; bool failed; + bool config_enabled; + bool config_change_pending; + spinlock_t config_lock; struct device dev; struct virtio_device_id id; const struct virtio_config_ops *config; |