[PATCH v2 00/10] Kernel Userspace protection for PPC32

[Christophe Leroy <christophe.leroy@c-s.fr>]

This series intend to implement Kernel Userspace protection for PPC32.
It comes on top of the v5 series for Radix.

The first patch of the series is a fix which is expected to be merged soon.
The second patch is a squash of Russel/Michael series for Radix.

Tested on:
- 8xx
- 83xx (ie book3s32 without hash table)
- QEMU MAC99 (ie book3s32 with hash table)

v2:
- Rebased/adapted the series on top of the v5 series for Radix.
- Reordered the patches so that we first have the ones common to 32 bits, then the 8xx, then book3s32
- Fixed lockup on bad data write (unauthorised write to user) on book3s32 hash.
- Added KUEP for book3s32

Christophe Leroy (9):
  powerpc/6xx: fix setup and use of SPRN_SPRG_PGDIR for hash32
  powerpc/32: Remove MSR_PR test when returning from syscall
  powerpc/32: Prepare for Kernel Userspace Access Protection
  powerpc/8xx: Only define APG0 and APG1
  powerpc/8xx: Add Kernel Userspace Execution Prevention
  powerpc/8xx: Add Kernel Userspace Access Protection
  powerpc/32s: Implement Kernel Userspace Execution Prevention.
  powerpc/32s: Prepare Kernel Userspace Access Protection
  powerpc/32s: Implement Kernel Userspace Access Protection

Russell Currey (1):
  powerpc/mm: Detect bad KUAP faults (Squash of v5 series)

 Documentation/admin-guide/kernel-parameters.txt |   4 +-
 arch/powerpc/include/asm/book3s/32/kup.h        | 149 ++++++++++++++++++++++++
 arch/powerpc/include/asm/book3s/32/mmu-hash.h   |   5 +
 arch/powerpc/include/asm/book3s/64/kup-radix.h  | 119 +++++++++++++++++++
 arch/powerpc/include/asm/exception-64s.h        |   2 +
 arch/powerpc/include/asm/feature-fixups.h       |   3 +
 arch/powerpc/include/asm/futex.h                |   4 +
 arch/powerpc/include/asm/kup.h                  |  65 +++++++++++
 arch/powerpc/include/asm/mmu.h                  |  10 +-
 arch/powerpc/include/asm/nohash/32/kup-8xx.h    |  68 +++++++++++
 arch/powerpc/include/asm/nohash/32/mmu-8xx.h    |  26 ++++-
 arch/powerpc/include/asm/processor.h            |   3 +
 arch/powerpc/include/asm/ptrace.h               |  11 +-
 arch/powerpc/include/asm/uaccess.h              |  38 ++++--
 arch/powerpc/kernel/asm-offsets.c               |   7 ++
 arch/powerpc/kernel/cpu_setup_6xx.S             |   3 -
 arch/powerpc/kernel/entry_32.S                  |  28 +++--
 arch/powerpc/kernel/entry_64.S                  |  27 ++++-
 arch/powerpc/kernel/exceptions-64s.S            |   3 +
 arch/powerpc/kernel/head_32.S                   |  52 +++++++--
 arch/powerpc/kernel/idle_book3s.S               |  39 +++++++
 arch/powerpc/kernel/setup_64.c                  |  10 ++
 arch/powerpc/lib/checksum_wrappers.c            |   4 +
 arch/powerpc/lib/code-patching.c                |   4 +-
 arch/powerpc/mm/8xx_mmu.c                       |  24 ++++
 arch/powerpc/mm/fault.c                         |  49 ++++++--
 arch/powerpc/mm/hash_low_32.S                   |  14 +--
 arch/powerpc/mm/init-common.c                   |  26 +++++
 arch/powerpc/mm/init_32.c                       |   3 +
 arch/powerpc/mm/pgtable-radix.c                 |  30 ++++-
 arch/powerpc/mm/pkeys.c                         |   1 +
 arch/powerpc/mm/ppc_mmu_32.c                    |  23 ++++
 arch/powerpc/platforms/Kconfig.cputype          |  37 ++++++
 33 files changed, 826 insertions(+), 65 deletions(-)
 create mode 100644 arch/powerpc/include/asm/book3s/32/kup.h
 create mode 100644 arch/powerpc/include/asm/book3s/64/kup-radix.h
 create mode 100644 arch/powerpc/include/asm/kup.h
 create mode 100644 arch/powerpc/include/asm/nohash/32/kup-8xx.h

-- 
2.13.3