On Thu, Feb 16, 2017 at 05:27:34PM -0800, David Daney wrote: > From: Alex Belits <alex.belits@xxxxxxxxxx> > > Some users must have 4K pages while needing a 48-bit VA space size. > The cleanest way do do this is to go to a 4-level page table for this > case. Each page table level using order-0 pages adds 9 bits to the > VA size (at 4K pages, so for four levels we get 9 * 4 + 12 == 48-bits. > > For the 4K page size case only we add support functions for the PUD > level of the page table tree, also the TLB exception handlers get an > extra level of tree walk. > > Signed-off-by: Alex Belits <alex.belits@xxxxxxxxxx> > [david.daney@xxxxxxxxxx] Forward port to v4.10 > Signed-off-by: David Daney <david.daney@xxxxxxxxxx> Thanks folks, queued for 4.12. While the need for 48-bit address space is not so surprising, the need for the combination of 4K pages and 48-bit address space is! I had some minor merge conflicts so it would be good if you could take a look if https://git.linux-mips.org/cgit/ralf/upstream-sfr.git/commit/?id=afba1896993a0b74aa2ad3076d594e455b3af301 looks good. Ralf
