Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote: > Upcoming paches to support the new 64-bit "BookE" powerpc architecture > will need to have the virtual address corresponding to PTE page when > freeing it, due to the way the HW table walker works. > > Basically, the TLB can be loaded with "large" pages that cover the whole > virtual space (well, sort-of, half of it actually) represented by a PTE > page, and which contain an "indirect" bit indicating that this TLB entry > RPN points to an array of PTEs from which the TLB can then create direct > entries. Thus, in order to invalidate those when PTE pages are deleted, > we need the virtual address to pass to tlbilx or tlbivax instructions. > > The old trick of sticking it somewhere in the PTE page struct page sucks > too much, the address is almost readily available in all call sites and > almost everybody implemets these as macros, so we may as well add the > argument everywhere. I added it to the pmd and pud variants for consistency. > > Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Acked-by: David Howells <dhowe...@redhat.com> [MN10300 & FRV] _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
