Messages in this thread | | | Date | Wed, 28 Oct 2015 11:25:24 +0900 | From | Joerg Roedel <> | Subject | Re: [PATCH 3/3] virtio_pci: Use the DMA API |
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On Wed, Oct 28, 2015 at 11:15:30AM +0900, Joerg Roedel wrote: > Same here, you need to call the dma_sync* functions when passing data > from/to the virtio-device.
Okay, forget about this comment. This patch only converts to dma_coherent allocations, which don't need synchronization.
> I think a good test for that is to boot a virtio kvm-guest with > swiotlb=force and see if it still works.
But this holds, Its a good way to test if your changes work with bounce-buffering. Together with DMA_API_DEBUG you also see if your specified dma_directions are right.
Joerg
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