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virtio-bus: introduce iommu_enabled()

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This patch introduce a new method for the virtio-bus for the transport
to report whether or not the IOMMU is enabled for the device.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20210804034803.1644-2-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2021-08-04 11:48:01 +08:00 committed by Michael S. Tsirkin
parent 2d050ed07c
commit dd014b4f49
2 changed files with 17 additions and 1 deletions
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14
hw/virtio/virtio-bus.c
View File

@ -325,6 +325,20 @@ static char *virtio_bus_get_fw_dev_path(DeviceState *dev)
return NULL;
}
bool virtio_bus_device_iommu_enabled(VirtIODevice *vdev)
{
DeviceState *qdev = DEVICE(vdev);
BusState *qbus = BUS(qdev_get_parent_bus(qdev));
VirtioBusState *bus = VIRTIO_BUS(qbus);
VirtioBusClass *klass = VIRTIO_BUS_GET_CLASS(bus);
if (!klass->iommu_enabled) {
return false;
}
return klass->iommu_enabled(qbus->parent);
}
static void virtio_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *bus_class = BUS_CLASS(klass);

4
include/hw/virtio/virtio-bus.h
View File

@ -93,6 +93,7 @@ struct VirtioBusClass {
*/
bool has_variable_vring_alignment;
AddressSpace *(*get_dma_as)(DeviceState *d);
bool (*iommu_enabled)(DeviceState *d);
};
struct VirtioBusState {
@ -154,5 +155,6 @@ void virtio_bus_release_ioeventfd(VirtioBusState *bus);
int virtio_bus_set_host_notifier(VirtioBusState *bus, int n, bool assign);
/* Tell the bus that the ioeventfd handler is no longer required. */
void virtio_bus_cleanup_host_notifier(VirtioBusState *bus, int n);
/* Whether the IOMMU is enabled for this device */
bool virtio_bus_device_iommu_enabled(VirtIODevice *vdev);
#endif /* VIRTIO_BUS_H */