Messages in this thread | | | Date | Tue, 12 Nov 2019 08:16:40 +0100 | From | Christoph Hellwig <> | Subject | Re: [PATCH v5 02/10] iommu/vt-d: Use per-device dma_ops |
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On Fri, Jul 26, 2019 at 09:56:51AM +0800, Lu Baolu wrote: > I think current code doesn't do the right thing. The user asks the iommu > driver to use identity domain for a device, but the driver force it back > to DMA domain because of the device address capability. > >> expensive. I don't think that this change is a good idea, and even if >> we decide that this is a good idea after all that should be done in a >> separate prep patch that explains the rationale. > > Yes. Make sense.
Now that the bounce code has landed it might be good time to revisit this patch in isolation and with a better explanation.
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