Fixes for SLB to C series

This is another spin of the fixes. Also painfully re-discovered that we need https://patchwork.ozlabs.org/patch/962327/, as it prevents POWER8 NUMA from booting (initial stack SLB for the !0 node CPUs gets cleared by the initial TLB flush without it, and the SLB handler now uses the stack...)

Question is whether to revert the series and try again next time. I'm inclined to maybe say revert because it's been holdig up the tree a bit and also some of these patches like the PPR fixes are pretty complicated and should really be done as pre-requisites rather than fixes.

Thanks,
Nick

Nicholas Piggin (9):
Revert "powerpc/64s/hash: remove user SLB data from the paca" powerpc/64: add struct int_regs to save additional registers on stack powerpc/64: interrupts save PPR on stack rather than thread_struct powerpc/64s/hash: Fix preloading of SLB entries powerpc/64s/hash: add more barriers for slb preloading powerpc/64s/hash: SLB fix preemption issues powerpc/64s/hash: Fix false positive preempt warnings powerpc/64s/hash: slb_flush_and_rebolt simplify powerpc/64s/hash: add some slb debugging tests

 arch/powerpc/include/asm/book3s/64/mmu-hash.h |   3 +-
 arch/powerpc/include/asm/exception-64s.h      |   9 +-
 arch/powerpc/include/asm/paca.h               |  16 ++
 arch/powerpc/include/asm/processor.h          |  12 +-
 arch/powerpc/include/asm/ptrace.h             |  18 +-
 arch/powerpc/kernel/asm-offsets.c             |  32 ++-
 arch/powerpc/kernel/entry_64.S                |  15 +-
 arch/powerpc/kernel/paca.c                    |  22 ++
 arch/powerpc/kernel/process.c                 |  54 ++---
 arch/powerpc/kernel/ptrace.c                  |   4 +-
 arch/powerpc/kernel/stacktrace.c              |   2 +-
 arch/powerpc/kernel/swsusp_asm64.S            |   2 +-
 arch/powerpc/mm/hash_utils_64.c               |  46 +++-
 arch/powerpc/mm/mmu_context.c                 |   3 +-
 arch/powerpc/mm/slb.c                         | 203 ++++++++++++------
 arch/powerpc/mm/slice.c                       |  29 ++-
 16 files changed, 314 insertions(+), 156 deletions(-)

2.18.0