[Linux-Xtensa] [PULL 0/25] xtensa improvements and fixes for 3.17

[Max Filippov]

Hi Chris,

please pull this series of improvement and fixes for xtensa for v3.17.
It is based on v3.16-rc7 and its correctness depends on

  15de36a4c3c mm/highmem: make kmap cache coloring aware

which is now in the mainline (got there through -mm tree).

The following changes since commit 64aa90f26c06e1cb2aacfb98a7d0eccfbd6c1a91:

  Linux 3.16-rc7 (2014-07-27 12:41:55 -0700)

are available in the git repository at:

  git://github.com/jcmvbkbc/linux-xtensa.git tags/xtensa-for-next-20140809

for you to fetch changes up to 05b343bc28505e516143ba4b6f4a33610fbea2e0:

  xtensa: deprecate fast_xtensa and fast_spill_registers syscalls (2014-08-07 03:32:30 +0400)

----------------------------------------------------------------
Xtensa improvements for 3.17:
- support highmem on cores with aliasing data cache. Enable highmem on kc705
  by default;
- simplify addition of new core variants (no need to modify Kconfig /
  Makefiles);
- improve robustness of unaligned access handler and its interaction with
  window overflow/underflow exception handlers;
- deprecate atomic and spill registers syscalls;
- clean up Kconfig: remove orphan MATH_EMULATION, sort 'select' statements;
- wire up renameat2 syscall.

Various fixes:
- fix address checks in dma_{alloc,free}_coherent (runtime BUG);
- fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage);
- fix TLBTEMP_BASE_2 region handling in fast_second_level_miss (runtime
  unrecoverable exception);
- fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace register
  clobbering);
- fix kernel/user jump out of fast_unaligned (potential runtime unrecoverable
  exception);
- replace termios IOCTL code definitions with constants (userspace build
  breakage).

----------------------------------------------------------------
Alan Douglas (1):
      xtensa: fix address checks in dma_{alloc,free}_coherent

Max Filippov (23):
      xtensa: simplify addition of new core variants
      xtensa: make MMU-related configuration options depend on MMU
      xtensa: sort 'select' statements in Kconfig
      xtensa: select HAVE_IDE only on platforms that may have it
      xtensa: remove orphan MATH_EMULATION symbol
      xtensa: replace IOCTL code definitions with constants
      xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS
      xtensa: make fixmap region addressing grow with index
      xtensa: allow fixmap and kmap span more than one page table
      xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
      xtensa: implement clear_user_highpage and copy_user_highpage
      xtensa: support aliasing cache in k[un]map_atomic
      xtensa: support aliasing cache in kmap
      xtensa: support highmem in aliasing cache flushing code
      xtensa: configure kc705 for highmem
      xtensa: fix kernel/user jump out of fast_unaligned
      xtensa: add double exception fixup handler for fast_unaligned
      xtensa: make fast_unaligned store restartable
      xtensa: move invalid unaligned instruction handler closer to its users
      xtensa: allow single-stepping through unaligned load/store
      xtensa: fix a6 and a7 handling in fast_syscall_xtensa
      xtensa: don't allow overflow/underflow on unaligned stack
      xtensa: deprecate fast_xtensa and fast_spill_registers syscalls

Miklos Szeredi (1):
      xtensa: add renameat2 syscall

 arch/xtensa/Kconfig                   |  92 +++++++++++++++++++-----
 arch/xtensa/Makefile                  |   8 +--
 arch/xtensa/boot/dts/kc705.dts        |   5 +-
 arch/xtensa/configs/common_defconfig  |   1 -
 arch/xtensa/configs/iss_defconfig     |   3 +-
 arch/xtensa/configs/s6105_defconfig   |   1 -
 arch/xtensa/include/asm/cacheflush.h  |   2 +
 arch/xtensa/include/asm/fixmap.h      |  30 ++++++--
 arch/xtensa/include/asm/highmem.h     |  40 ++++++++++-
 arch/xtensa/include/asm/page.h        |  14 +++-
 arch/xtensa/include/asm/pgtable.h     |   7 +-
 arch/xtensa/include/asm/uaccess.h     |   5 ++
 arch/xtensa/include/uapi/asm/ioctls.h |  19 ++---
 arch/xtensa/include/uapi/asm/unistd.h |   5 +-
 arch/xtensa/kernel/align.S            | 128 +++++++++++++++++++++-------------
 arch/xtensa/kernel/entry.S            |  54 ++++++++++----
 arch/xtensa/kernel/pci-dma.c          |  12 ++--
 arch/xtensa/kernel/traps.c            |   5 +-
 arch/xtensa/kernel/vectors.S          |   8 ++-
 arch/xtensa/kernel/vmlinux.lds.S      |   4 +-
 arch/xtensa/mm/cache.c                |  77 +++++++++++++++++---
 arch/xtensa/mm/highmem.c              |  41 ++++++++---
 arch/xtensa/mm/misc.S                 | 116 ++++++++++++++----------------
 arch/xtensa/mm/mmu.c                  |  38 +++++-----
 24 files changed, 498 insertions(+), 217 deletions(-)

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1.8.1.4