On Tue, Apr 11, 2023 at 03:23:43PM +0800, Xuan Zhuo wrote: > > If a direct map or not is used is a decision done by the platform code, > > often based on firmware tables. You can't just override that. > > > Can Virtio Device set its own dma_ops? It is a device on the virtual bus. It > sets its own DMA_OPS. I think it is reasonable.
No, it can't. virtio devices are backed by PCI, platform or other bus devices, and the (often virtual) firmware controls how DMA mapping is to be performed for them, at least for the platform_access case. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
