[PATCH v2 00/12] powerpc/book3s/64/pkeys: Simplify the code

[Aneesh Kumar K.V]

This patch series update the pkey subsystem with more documentation and
rename variables so that it is easy to follow the code. The last patch
does fix a problem where we are treating keys above max_pkey as available.
But userspace is not impacted because using that key in mprotect_pkey returns
error due to limit check there. Also the uamor, value set by the platform is such
that it will deny modification of keys above max pkey.

Changes from V1:
* Rebase to the latest kernel.
* Added two new patches 6 and 12.


Aneesh Kumar K.V (12):
  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

 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 +++
 arch/powerpc/include/asm/book3s/64/mmu-hash.h |   8 +-
 arch/powerpc/include/asm/book3s/64/pgtable.h  |  17 +-
 arch/powerpc/include/asm/book3s/64/pkeys.h    |  25 +++
 arch/powerpc/include/asm/cputable.h           |  10 +-
 arch/powerpc/include/asm/pkeys.h              |  43 +---
 arch/powerpc/kernel/dt_cpu_ftrs.c             |   6 -
 arch/powerpc/mm/book3s64/pkeys.c              | 210 ++++++++++--------
 10 files changed, 222 insertions(+), 162 deletions(-)
 create mode 100644 arch/powerpc/include/asm/book3s/64/hash-pkey.h
 create mode 100644 arch/powerpc/include/asm/book3s/64/pkeys.h

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2.26.2