On Fri, Apr 08, 2022 at 09:47:57AM -0600, Alex Williamson wrote: > > Ultimately VFIO plumbs the result of enforce_cache_coherency() back into > > the x86 platform code through kvm_arch_register_noncoherent_dma() which > > controls if the WBINVD instruction is available in the guest. No other > > arch implements kvm_arch_register_noncoherent_dma(). > > I think this last sentence is alluding to it, but I wish the user > visible change to VFIO_DMA_CC_IOMMU on non-x86 were more explicit. > Perhaps for the last sentence: > > No other archs implement kvm_arch_register_noncoherent_dma() nor are > there any other known consumers of VFIO_DMA_CC_IOMMU that might be > affected by the user visible result change on non-x86 archs. Done Thanks, Jason
