On Wed, Jan 13, 2021 at 06:27:08PM +0000, Robin Murphy wrote: >> Can we hook in somewhat lower level in the dma-direct code so that all >> the remapping in dma-direct can be reused instead of duplicated? That >> also becomes important if we want to use non-remapping uncached support, >> e.g. on mips or x86, or the direct changing of the attributes that Will >> planned to look into for arm64. > > Indeed, AFAICS this ought to boil down to a direct equivalent of > __dma_direct_alloc_pages() - other than the address there should be no > conceptual difference between pages from the restricted pool and those from > the regular page allocator, so this probably deserves to be plumbed in as > an alternative to that. Yes, that's what I mean. You managed to word it much better, though.
