This feature flag allows the driver enabling virtqueues both before and after DRIVER_OK. This is needed for software assisted live migration, so userland can restore the device status in devices with control virtqueue before the dataplane is enabled.
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| @@ -181,5 +181,9 @@ struct vhost_vdpa_iova_range { · 180 unmodified lines | ||
| 181 | 181 | #define VHOST_BACKEND_F_SUSPEND 0x4 |
| 182 | 182 | /* Device can be resumed */ |
| 183 | 183 | #define VHOST_BACKEND_F_RESUME 0x5 |
| 184 | +/* Device supports the driver enabling virtqueues both before and after | |
| 185 | + * DRIVER_OK | |
| 186 | + */ | |
| 187 | +#define VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK 0x6 | |
| 184 | 188 | |
| 185 | 189 | #endif |