[Qemu-devel] [PATCH v4 00/35] cmpxchg-based emulation of atomics

[Richard Henderson <rth@twiddle.net>]

Rebased on top of Paolo's safe-work series, which means
that we now have cpu_exec_step_atomic for system mode as
well as linux-user.  This should fix the problems with
atomic access to notdirty pages that have been reported.

Folded in some feedback from Alex from v3.

A complete tree may be found at

  git://github.com/rth7680/qemu.git atomic-4


r~


Emilio G. Cota (18):
  atomics: add atomic_xor
  atomics: add atomic_op_fetch variants
  target-i386: emulate LOCK'ed cmpxchg using cmpxchg helpers
  target-i386: emulate LOCK'ed OP instructions using atomic helpers
  target-i386: emulate LOCK'ed INC using atomic helper
  target-i386: emulate LOCK'ed NOT using atomic helper
  target-i386: emulate LOCK'ed NEG using cmpxchg helper
  target-i386: emulate LOCK'ed XADD using atomic helper
  target-i386: emulate LOCK'ed BTX ops using atomic helpers
  target-i386: emulate XCHG using atomic helper
  target-i386: remove helper_lock()
  tests: add atomic_add-bench
  target-arm: emulate LL/SC using cmpxchg helpers
  target-arm: emulate SWP with atomic_xchg helper
  target-arm: emulate aarch64's LL/SC using cmpxchg helpers
  linux-user: remove handling of ARM's EXCP_STREX
  linux-user: remove handling of aarch64's EXCP_STREX
  target-arm: remove EXCP_STREX + cpu_exclusive_{test, info}

Richard Henderson (17):
  exec: Avoid direct references to Int128 parts
  int128: Use __int128 if available
  int128: Add int128_make128
  tcg: Add EXCP_ATOMIC
  HACK: Always enable parallel_cpus
  cputlb: Replace SHIFT with DATA_SIZE
  cputlb: Move probe_write out of softmmu_template.h
  cputlb: Remove includes from softmmu_template.h
  cputlb: Move most of iotlb code out of line
  cputlb: Tidy some macros
  tcg: Add atomic helpers
  tcg: Add atomic128 helpers
  tcg: Add CONFIG_ATOMIC64
  tcg: Emit barriers with parallel_cpus
  target-arm: Rearrange aa32 load and store functions
  target-alpha: Introduce MMU_PHYS_IDX
  target-alpha: Emulate LL/SC using cmpxchg helpers

 Makefile.objs              |   1 -
 Makefile.target            |   1 +
 atomic_template.h          | 211 +++++++++++++++++++++++++
 configure                  |  62 +++++++-
 cpu-exec-common.c          |   6 +
 cpu-exec.c                 |  30 ++++
 cpus.c                     |   2 +
 cputlb.c                   | 203 ++++++++++++++++++++++--
 exec.c                     |   4 +-
 include/exec/cpu-all.h     |   1 +
 include/exec/exec-all.h    |   1 +
 include/qemu-common.h      |   1 +
 include/qemu/atomic.h      |  40 ++++-
 include/qemu/int128.h      | 171 +++++++++++++++++++-
 linux-user/main.c          | 312 ++++++------------------------------
 softmmu_template.h         | 104 ++----------
 target-alpha/cpu.h         |  22 +--
 target-alpha/helper.c      |  14 +-
 target-alpha/helper.h      |   9 --
 target-alpha/machine.c     |   2 -
 target-alpha/mem_helper.c  |  73 ---------
 target-alpha/translate.c   | 148 +++++++++--------
 target-arm/cpu.h           |  17 +-
 target-arm/helper-a64.c    | 113 +++++++++++++
 target-arm/helper-a64.h    |   2 +
 target-arm/internals.h     |   4 +-
 target-arm/translate-a64.c | 106 ++++++-------
 target-arm/translate.c     | 342 ++++++++++++++-------------------------
 target-arm/translate.h     |   4 -
 target-i386/helper.h       |   4 +-
 target-i386/mem_helper.c   | 153 ++++++++++++------
 target-i386/translate.c    | 386 +++++++++++++++++++++++++++++----------------
 tcg-runtime.c              |  74 +++++++--
 tcg/tcg-op.c               | 354 +++++++++++++++++++++++++++++++++++++++--
 tcg/tcg-op.h               |  44 ++++++
 tcg/tcg-runtime.h          | 109 +++++++++++++
 tcg/tcg.h                  |  85 ++++++++++
 tests/.gitignore           |   1 +
 tests/Makefile.include     |   4 +-
 tests/atomic_add-bench.c   | 181 +++++++++++++++++++++
 tests/test-int128.c        |  22 +--
 translate-all.c            |   1 +
 42 files changed, 2336 insertions(+), 1088 deletions(-)
 create mode 100644 atomic_template.h
 create mode 100644 tests/atomic_add-bench.c

-- 
2.5.5