diff options
| author | Jason Wang <jasowang@redhat.com> | 2017-01-11 12:32:12 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-18 22:59:53 +0200 |
| commit | c471ad0e9bd46ca5f5c9c796e727230e043a091d (patch) | |
| tree | 7bbb58cd3f12309924336ff72444021d988cfb45 /include/hw/virtio/vhost.h | |
| parent | 1448c133e19372359d9de68626c06088ba79a34b (diff) | |
vhost_net: device IOTLB support
This patches implements Device IOTLB support for vhost kernel. This is
done through:
1) switch to use dma helpers when map/unmap vrings from vhost codes
2) introduce a set of VhostOps to:
- setting up device IOTLB request callback
- processing device IOTLB request
- processing device IOTLB invalidation
2) kernel support for Device IOTLB API:
- allow vhost-net to query the IOMMU IOTLB entry through eventfd
- enable the ability for qemu to update a specified mapping of vhost
- through ioctl.
- enable the ability to invalidate a specified range of iova for the
device IOTLB of vhost through ioctl. In x86/intel_iommu case this is
triggered through iommu memory region notifier from device IOTLB
invalidation descriptor processing routine.
With all the above, kernel vhost_net can co-operate with userspace
IOMMU. For vhost-user, the support could be easily done on top by
implementing the VhostOps.
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/virtio/vhost.h')
| -rw-r--r-- | include/hw/virtio/vhost.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h index 1fe5aadef5..52f633ec89 100644 --- a/include/hw/virtio/vhost.h +++ b/include/hw/virtio/vhost.h @@ -21,6 +21,7 @@ struct vhost_virtqueue { unsigned long long used_phys; unsigned used_size; EventNotifier masked_notifier; + struct vhost_dev *dev; }; typedef unsigned long vhost_log_chunk_t; @@ -38,6 +39,7 @@ struct vhost_log { struct vhost_memory; struct vhost_dev { + VirtIODevice *vdev; MemoryListener memory_listener; struct vhost_memory *mem; int n_mem_sections; @@ -62,6 +64,7 @@ struct vhost_dev { void *opaque; struct vhost_log *log; QLIST_ENTRY(vhost_dev) entry; + IOMMUNotifier n; }; int vhost_dev_init(struct vhost_dev *hdev, void *opaque, @@ -91,4 +94,5 @@ bool vhost_has_free_slot(void); int vhost_net_set_backend(struct vhost_dev *hdev, struct vhost_vring_file *file); +void vhost_device_iotlb_miss(struct vhost_dev *dev, uint64_t iova, int write); #endif |