On Wed, Mar 11, 2020 at 03:35:06PM -0300, Jason Gunthorpe wrote: > From: Jason Gunthorpe <jgg@xxxxxxxxxxxx> > > Currently if a special PTE is encountered hmm_range_fault() immediately > returns EFAULT and sets the HMM_PFN_SPECIAL error output (which nothing > uses). > > EFAULT should only be returned after testing with hmm_pte_need_fault(). > > Also pte_devmap() and pte_special() are exclusive, and there is no need to > check IS_ENABLED, pte_special() is stubbed out to return false on > unsupported architectures. I think the right fix is to just kill HMM_PFN_SPECIAL and treat any fault on special ptes that aren't the zero page as an error. _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
