[PATCH v5 00/26] powerpc/book3s/64/pkeys: Simplify the code

This patch series update the pkey subsystem with more documentation and
rename variables so that it is easy to follow the code. We drop the changes
to support KUAP/KUEP with hash translation in this update. The changes
are adding 200 cycles to null syscalls benchmark and I want to look at that
closely before requesting a merge. The rest of the patches are included
in this series. This should avoid having to carry a large patchset across
the upstream merge. Some of the changes in here make the hash KUEP/KUAP
addition simpler.

Changes from v4:
* Drop hash KUAP/KUEP changes.

Changes from v3:
* Fix build error reported by kernel test robot [off-list ref]

Changes from v2:
* Rebase to the latest kernel.
* Fixed a bug with disabling KUEP/KUAP on kernel command line
* Added a patch to make kup key dynamic.

Changes from v1:
* Rebased on latest kernel

Aneesh Kumar K.V (26):
  powerpc/book3s64/pkeys: Fixup bit numbering
  powerpc/book3s64/pkeys: pkeys are supported only on hash on book3s.
  powerpc/book3s64/pkeys: Move pkey related bits in the linux page table
  powerpc/book3s64/pkeys: Explain key 1 reservation details
  powerpc/book3s64/pkeys: Simplify the key initialization
  powerpc/book3s64/pkeys: Prevent key 1 modification from userspace.
  powerpc/book3s64/pkeys: kill cpu feature key CPU_FTR_PKEY
  powerpc/book3s64/pkeys: Convert execute key support to static key
  powerpc/book3s64/pkeys: Simplify pkey disable branch
  powerpc/book3s64/pkeys: Convert pkey_total to max_pkey
  powerpc/book3s64/pkeys: Make initial_allocation_mask static
  powerpc/book3s64/pkeys: Mark all the pkeys above max pkey as reserved
  powerpc/book3s64/pkeys: Enable MMU_FTR_PKEY
  powerpc/book3s64/kuep: Add MMU_FTR_KUEP
  powerpc/book3s64/pkeys: Use execute_pkey_disable static key
  powerpc/book3s64/pkeys: Use MMU_FTR_PKEY instead of pkey_disabled
    static key
  powerpc/book3s64/keys: Print information during boot.
  powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec
  powerpc/book3s64/kuap: Move KUAP related function outside radix
  powerpc/book3s64/kuep: Move KUEP related function outside radix
  powerpc/book3s64/kuap: Rename MMU_FTR_RADIX_KUAP to MMU_FTR_KUAP
  powerpc/book3s64/kuap/kuep: Make KUAP and KUEP a subfeature of
    PPC_MEM_KEYS
  powerpc/book3s64/kuap: Move UAMOR setup to key init function
  powerpc/selftest/ptrave-pkey: Rename variables to make it easier to
    follow code
  powerpc/selftest/ptrace-pkey: Update the test to mark an invalid pkey
    correctly
  powerpc/selftest/ptrace-pkey: IAMR and uamor cannot be updated by
    ptrace

 arch/powerpc/include/asm/book3s/64/hash-4k.h  |  21 +-
 arch/powerpc/include/asm/book3s/64/hash-64k.h |  12 +-
 .../powerpc/include/asm/book3s/64/hash-pkey.h |  32 ++
 .../asm/book3s/64/{kup-radix.h => kup.h}      |  70 ++--
 arch/powerpc/include/asm/book3s/64/mmu-hash.h |   8 +-
 arch/powerpc/include/asm/book3s/64/mmu.h      |   6 +
 arch/powerpc/include/asm/book3s/64/pgtable.h  |  17 +-
 arch/powerpc/include/asm/book3s/64/pkeys.h    |  25 ++
 arch/powerpc/include/asm/cputable.h           |  13 +-
 arch/powerpc/include/asm/kup.h                |  16 +-
 arch/powerpc/include/asm/mmu.h                |  17 +-
 arch/powerpc/include/asm/pkeys.h              |  65 +---
 arch/powerpc/include/asm/processor.h          |   1 -
 arch/powerpc/include/asm/ptrace.h             |   2 +-
 arch/powerpc/kernel/asm-offsets.c             |   2 +-
 arch/powerpc/kernel/dt_cpu_ftrs.c             |   6 -
 arch/powerpc/kernel/misc_64.S                 |  14 -
 arch/powerpc/kernel/prom.c                    |   5 +
 arch/powerpc/kernel/ptrace/ptrace-view.c      |  17 +-
 arch/powerpc/kernel/smp.c                     |   5 +
 arch/powerpc/kernel/syscall_64.c              |   2 +-
 arch/powerpc/kexec/core_64.c                  |   3 +
 arch/powerpc/mm/book3s64/pgtable.c            |   3 +
 arch/powerpc/mm/book3s64/pkeys.c              | 315 +++++++++++-------
 arch/powerpc/mm/book3s64/radix_pgtable.c      |  36 --
 arch/powerpc/platforms/Kconfig.cputype        |   4 +-
 .../selftests/powerpc/ptrace/ptrace-pkey.c    |  53 ++-
 27 files changed, 448 insertions(+), 322 deletions(-)
 create mode 100644 arch/powerpc/include/asm/book3s/64/hash-pkey.h
 rename arch/powerpc/include/asm/book3s/64/{kup-radix.h => kup.h} (78%)
 create mode 100644 arch/powerpc/include/asm/book3s/64/pkeys.h

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2.26.2