On 5/26/23 14:37, Christoph Hellwig wrote: > On Wed, May 24, 2023 at 04:01:14PM +0200, Arnaud POULIQUEN wrote: >>> As per the discussion back then: don't just blindly do the same dumb >>> thing again and fix the interfae to actually pass in a page array, >>> or iov_iter or an actually useful container that fits. >>> >> >> I suppose your are speaking about this discussion: >> https://lore.kernel.org/all/20221002002326.946620-3-ira.weiny@xxxxxxxxx/ > > Yes. > >> >> If I'm not mistaken, I should modify at tee_shm_register_kernel_buf API and >> register_shm_helper inernal function, right? >> > >> What about having equivalent of shm_get_kernel_pages in an external helper (to >> defined where to put it), could it be an alternative of the upadate of the >> tee_shm API? > > I think the fundamentally right thing is to pass an iov_iter to > register_shm_helper, and then use the new as of 6.3 > iov_iter_extract_pages helper to extract the pages from that. For > the kernel users you can then simply pass down an ITER_BVEC iter > that you can fill with vmalloc pages if you want. > Thanks for the advice! Regards, Arnaud
