[RFC PATCH for 4.15 v12 00/22] Restartable sequences and CPU op vector

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

Hi,

Following changes based on a thorough coding style and patch changelog
review from Thomas Gleixner and Peter Zijlstra, I'm respinning this
series for another RFC.

This series contains:

- Restartable sequences system call (x86 32/64, powerpc 32/64, arm 32),
- CPU operation vector system call (x86 32/64, powerpc 32/64, arm 32),
- membarrier shared expedited command.

Compared to v11, I've removed the "sync core" membarrier command,
now queued for 4.16.

I have also fixed a missing page fault-in in cpu_opv, and added
a selftest test-case to cover this.

This series applies on top of current Linus' master as of
commit e1d1ea549b57 "Merge tag 'fbdev-v4.15' of git://github.com/bzolnier/linux"

The git tag including this series can be found at
https://git.kernel.org/pub/scm/linux/kernel/git/rseq/linux-rseq.git
tag: v4.14+-rseq-20171121

Thanks,

Mathieu

Boqun Feng (2):
  powerpc: Add support for restartable sequences
  powerpc: Wire up restartable sequences system call

Mathieu Desnoyers (20):
  uapi headers: Provide types_32_64.h
  rseq: Introduce restartable sequences system call (v12)
  arm: Add restartable sequences support
  arm: Wire up restartable sequences system call
  x86: Add support for restartable sequences
  x86: Wire up restartable sequence system call
  sched: Implement push_task_to_cpu
  cpu_opv: Provide cpu_opv system call (v4)
  x86: Wire up cpu_opv system call
  powerpc: Wire up cpu_opv system call
  arm: Wire up cpu_opv system call
  cpu_opv: selftests: Implement selftests (v3)
  rseq: selftests: Provide self-tests (v3)
  rseq: selftests: arm: workaround gcc asm size guess
  Fix: membarrier: add missing preempt off around smp_call_function_many
  membarrier: selftest: Test private expedited cmd (v2)
  powerpc: membarrier: Skip memory barrier in switch_mm() (v7)
  membarrier: Document scheduler barrier requirements (v5)
  membarrier: provide SHARED_EXPEDITED command (v2)
  membarrier: selftest: Test shared expedited cmd

 MAINTAINERS                                        |   21 +
 arch/Kconfig                                       |    7 +
 arch/arm/Kconfig                                   |    1 +
 arch/arm/kernel/signal.c                           |    7 +
 arch/arm/tools/syscall.tbl                         |    2 +
 arch/powerpc/Kconfig                               |    2 +
 arch/powerpc/include/asm/membarrier.h              |   26 +
 arch/powerpc/include/asm/systbl.h                  |    2 +
 arch/powerpc/include/asm/unistd.h                  |    2 +-
 arch/powerpc/include/uapi/asm/unistd.h             |    2 +
 arch/powerpc/kernel/signal.c                       |    3 +
 arch/powerpc/mm/mmu_context.c                      |    7 +
 arch/x86/Kconfig                                   |    1 +
 arch/x86/entry/common.c                            |    1 +
 arch/x86/entry/syscalls/syscall_32.tbl             |    2 +
 arch/x86/entry/syscalls/syscall_64.tbl             |    2 +
 arch/x86/kernel/signal.c                           |    6 +
 arch/x86/mm/tlb.c                                  |    5 +
 fs/exec.c                                          |    1 +
 include/linux/sched.h                              |  102 ++
 include/linux/sched/mm.h                           |   21 +-
 include/linux/syscalls.h                           |    6 +
 include/trace/events/rseq.h                        |   56 +
 include/uapi/linux/cpu_opv.h                       |  114 ++
 include/uapi/linux/membarrier.h                    |   34 +-
 include/uapi/linux/rseq.h                          |  141 +++
 include/uapi/linux/types_32_64.h                   |   67 +
 init/Kconfig                                       |   31 +
 kernel/Makefile                                    |    2 +
 kernel/cpu_opv.c                                   | 1060 ++++++++++++++++
 kernel/fork.c                                      |    2 +
 kernel/rseq.c                                      |  338 +++++
 kernel/sched/core.c                                |   88 +-
 kernel/sched/membarrier.c                          |  125 +-
 kernel/sched/sched.h                               |    9 +
 kernel/sys_ni.c                                    |    4 +
 tools/testing/selftests/Makefile                   |    2 +
 tools/testing/selftests/cpu-opv/.gitignore         |    1 +
 tools/testing/selftests/cpu-opv/Makefile           |   17 +
 .../testing/selftests/cpu-opv/basic_cpu_opv_test.c | 1189 ++++++++++++++++++
 tools/testing/selftests/cpu-opv/cpu-op.c           |  348 ++++++
 tools/testing/selftests/cpu-opv/cpu-op.h           |   68 ++
 tools/testing/selftests/lib.mk                     |    4 +
 .../testing/selftests/membarrier/membarrier_test.c |  162 ++-
 tools/testing/selftests/rseq/.gitignore            |    4 +
 tools/testing/selftests/rseq/Makefile              |   23 +
 .../testing/selftests/rseq/basic_percpu_ops_test.c |  333 +++++
 tools/testing/selftests/rseq/basic_test.c          |   55 +
 tools/testing/selftests/rseq/param_test.c          | 1285 ++++++++++++++++++++
 tools/testing/selftests/rseq/rseq-arm.h            |  568 +++++++++
 tools/testing/selftests/rseq/rseq-ppc.h            |  567 +++++++++
 tools/testing/selftests/rseq/rseq-x86.h            |  898 ++++++++++++++
 tools/testing/selftests/rseq/rseq.c                |  116 ++
 tools/testing/selftests/rseq/rseq.h                |  154 +++
 tools/testing/selftests/rseq/run_param_test.sh     |  124 ++
 55 files changed, 8166 insertions(+), 52 deletions(-)
 create mode 100644 arch/powerpc/include/asm/membarrier.h
 create mode 100644 include/trace/events/rseq.h
 create mode 100644 include/uapi/linux/cpu_opv.h
 create mode 100644 include/uapi/linux/rseq.h
 create mode 100644 include/uapi/linux/types_32_64.h
 create mode 100644 kernel/cpu_opv.c
 create mode 100644 kernel/rseq.c
 create mode 100644 tools/testing/selftests/cpu-opv/.gitignore
 create mode 100644 tools/testing/selftests/cpu-opv/Makefile
 create mode 100644 tools/testing/selftests/cpu-opv/basic_cpu_opv_test.c
 create mode 100644 tools/testing/selftests/cpu-opv/cpu-op.c
 create mode 100644 tools/testing/selftests/cpu-opv/cpu-op.h
 create mode 100644 tools/testing/selftests/rseq/.gitignore
 create mode 100644 tools/testing/selftests/rseq/Makefile
 create mode 100644 tools/testing/selftests/rseq/basic_percpu_ops_test.c
 create mode 100644 tools/testing/selftests/rseq/basic_test.c
 create mode 100644 tools/testing/selftests/rseq/param_test.c
 create mode 100644 tools/testing/selftests/rseq/rseq-arm.h
 create mode 100644 tools/testing/selftests/rseq/rseq-ppc.h
 create mode 100644 tools/testing/selftests/rseq/rseq-x86.h
 create mode 100644 tools/testing/selftests/rseq/rseq.c
 create mode 100644 tools/testing/selftests/rseq/rseq.h
 create mode 100755 tools/testing/selftests/rseq/run_param_test.sh

-- 
2.11.0