On Tue, Apr 11, 2023 at 12:54:46PM +0800, Jason Wang wrote: > Ok, just to clarify, I meant there could be a case where the virtqueue > is emulated by software, in this case we need check whether the > virtqueue has a dma device or not in vring_use_dma_api(). If not we > need return false. Well, that's what vring_use_dma_api basically does. Such devics just should never have VIRTIO_F_ACCESS_PLATFORM set. If there is a really good reason for such a device to have VIRTIO_F_ACCESS_PLATFORM set we'd need an extra quirk in vring_use_dma_api indeed. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
