[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 3/3] xen: expose that grant table mappings update the IOMMU
On Mon, 2014-04-07 at 18:02 +0200, Roger Pau Monne wrote: > Add a new XENFEAT_hvm_gntmap_supports_iommu that is used to check > whether the hypervisor properly updates the IOMMU on auto-translated > guests when doing a grant table map/unmap operation. Is it the case on x86 that all devices are behind the IOMMU? On ARM with have the issue that only a subset of peripherals are behind the IOMMU, for the rest we need other tricks like 1:1 mappings and swiotlb bouncing (for dom0 only, we just don't support passing these devices thru to domU). Just want to make sure you aren't going to trip over a similar issue on x86 after this ABI has been set... Ian. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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