diff options
| author | Jason Wang <jasowang@redhat.com> | 2016-12-30 18:09:10 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-10 05:56:58 +0200 |
| commit | 8607f5c3072caeebbe0217df28651fffd3a79fd9 (patch) | |
| tree | 1510ec22428bb73d8dc8c719eee52eae33b43853 /include/hw/virtio/virtio-bus.h | |
| parent | a08aaff811fb194950f79711d2afe5a892ae03a4 (diff) | |
virtio: convert to use DMA api
Currently, all virtio devices bypass IOMMU completely. This is because
address_space_memory is assumed and used during DMA emulation. This
patch converts the virtio core API to use DMA API. This idea is
- introducing a new transport specific helper to query the dma address
space. (only pci version is implemented).
- query and use this address space during virtio device guest memory
accessing when iommu platform (VIRTIO_F_IOMMU_PLATFORM) was enabled
for this device.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Amit Shah <amit.shah@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-block@nongnu.org
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/virtio-bus.h')
| -rw-r--r-- | include/hw/virtio/virtio-bus.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h index 8a51e2c564..a63c1d216d 100644 --- a/include/hw/virtio/virtio-bus.h +++ b/include/hw/virtio/virtio-bus.h @@ -88,6 +88,7 @@ typedef struct VirtioBusClass { * Note that changing this will break migration for this transport. */ bool has_variable_vring_alignment; + AddressSpace *(*get_dma_as)(DeviceState *d); } VirtioBusClass; struct VirtioBusState { |