Merge several updates to the ARS implementation. Highlights include: * Support retrieval of short-ARS results if the ARS state is "requires continuation", and even if the "no_init_ars" module parameter is specified. * Allow busy-polling of the kernel ARS state by allowing root to reset the exponential back-off timer. * Filter potentially stale ARS results by tracking query-ARS relative to the previous start-ARS.
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| @@ -78,6 +78,12 @@ · 77 unmodified lines | |||
| 78 | /* This feature indicates support for the packed virtqueue layout. */ | 78 | /* This feature indicates support for the packed virtqueue layout. */ |
| 79 | #define VIRTIO_F_RING_PACKED 34 | 79 | #define VIRTIO_F_RING_PACKED 34 |
| 80 | 80 | ||
| 81 | /* | ||
| 82 | * This feature indicates that memory accesses by the driver and the | ||
| 83 | * device are ordered in a way described by the platform. | ||
| 84 | */ | ||
| 85 | #define VIRTIO_F_ORDER_PLATFORM 36 | ||
| 86 | |||
| 81 | /* | 87 | /* |
| 82 | * Does the device support Single Root I/O Virtualization? | 88 | * Does the device support Single Root I/O Virtualization? |
| 83 | */ | 89 | */ |
| @@ -213,14 +213,4 @@ struct vring_packed_desc { · 212 unmodified lines | |||
| 213 | __le16 flags; | 213 | __le16 flags; |
| 214 | }; | 214 | }; |
| 215 | 215 | ||
| 216 | struct vring_packed { | ||
| 217 | unsigned int num; | ||
| 218 | |||
| 219 | struct vring_packed_desc *desc; | ||
| 220 | |||
| 221 | struct vring_packed_desc_event *driver; | ||
| 222 | |||
| 223 | struct vring_packed_desc_event *device; | ||
| 224 | }; | ||
| 225 | |||
| 226 | #endif /* _UAPI_LINUX_VIRTIO_RING_H */ | 216 | #endif /* _UAPI_LINUX_VIRTIO_RING_H */ |