Messages in this thread | | | Subject | Re: [PATCH 0/3] fix GART to respect device's dma_mask about virtual mappings | From | Andi Kleen <> | Date | Tue, 16 Sep 2008 02:54:32 +0200 |
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FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> writes:
> Currently, gart IOMMU ignores device's dma_mask when it does virtual > mappings. So it could give a device a virtual address that the device > can't access to.
Huh? That is what the need_iommu() logic in gart_map_sg() does. An I'm not aware of any bugs in this area.
Did you actually see that failure in practice? I don't see how it could happen.
-Andi -- ak@linux.intel.com
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