Messages in this thread | | | Date | Thu, 7 Apr 2022 06:41:09 -0700 | From | Christoph Hellwig <> | Subject | Re: [PATCH v2 1/2] iommu/amd: Enable swiotlb in all cases |
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On Thu, Apr 07, 2022 at 02:31:44PM +0100, Robin Murphy wrote: > FWIW it's also broken for another niche case where > iommu_default_passthrough() == false at init, but the user later changes a > 32-bit device's default domain type to passthrough via sysfs, such that it > starts needing regular dma-direct bouncing.
Yeah.
We also have yet another issue: swiotlb is not allocate if there is no memory outside the 4GB physical address space. I think I can fix that easily after my swiotlb init series goes in, before that it would be a bit of a mess spread over all the architectures.
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