[PATCH v3 0/9] FP/VEC/VSX switching optimisations

[Cyril Bur]

Cover-letter for V1 of the series is at
https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-November/136350.html

Cover-letter for V2 of the series is at
https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-January/138054.html

Changes in V3:
Addressed review comments from Michael Neuling
 - Made commit message in 4/9 better reflect the patch
 - Removed overuse of #ifdef blocks and redundant condition in 5/9
 - Split 6/8 in two to better prepare for 7,8,9
 - Removed #ifdefs in 6/9


Cyril Bur (9):
  selftests/powerpc: Test the preservation of FPU and VMX regs across
    syscall
  selftests/powerpc: Test preservation of FPU and VMX regs across
    preemption
  selftests/powerpc: Test FPU and VMX regs in signal ucontext
  powerpc: Explicitly disable math features when copying thread
  powerpc: Restore FPU/VEC/VSX if previously used
  powerpc: Prepare for splitting giveup_{fpu,altivec,vsx} in two
  powerpc: Add the ability to save FPU without giving it up
  powerpc: Add the ability to save Altivec without giving it up
  powerpc: Add the ability to save VSX without giving it up

 arch/powerpc/include/asm/processor.h               |   2 +
 arch/powerpc/include/asm/switch_to.h               |  13 +-
 arch/powerpc/kernel/asm-offsets.c                  |   2 +
 arch/powerpc/kernel/entry_64.S                     |  21 +-
 arch/powerpc/kernel/fpu.S                          |  25 +--
 arch/powerpc/kernel/ppc_ksyms.c                    |   4 -
 arch/powerpc/kernel/process.c                      | 172 ++++++++++++++--
 arch/powerpc/kernel/vector.S                       |  45 +---
 tools/testing/selftests/powerpc/Makefile           |   3 +-
 tools/testing/selftests/powerpc/basic_asm.h        |  26 +++
 tools/testing/selftests/powerpc/math/.gitignore    |   6 +
 tools/testing/selftests/powerpc/math/Makefile      |  19 ++
 tools/testing/selftests/powerpc/math/fpu_asm.S     | 195 ++++++++++++++++++
 tools/testing/selftests/powerpc/math/fpu_preempt.c | 113 ++++++++++
 tools/testing/selftests/powerpc/math/fpu_signal.c  | 135 ++++++++++++
 tools/testing/selftests/powerpc/math/fpu_syscall.c |  90 ++++++++
 tools/testing/selftests/powerpc/math/vmx_asm.S     | 229 +++++++++++++++++++++
 tools/testing/selftests/powerpc/math/vmx_preempt.c | 113 ++++++++++
 tools/testing/selftests/powerpc/math/vmx_signal.c  | 138 +++++++++++++
 tools/testing/selftests/powerpc/math/vmx_syscall.c |  92 +++++++++
 20 files changed, 1360 insertions(+), 83 deletions(-)
 create mode 100644 tools/testing/selftests/powerpc/basic_asm.h
 create mode 100644 tools/testing/selftests/powerpc/math/.gitignore
 create mode 100644 tools/testing/selftests/powerpc/math/Makefile
 create mode 100644 tools/testing/selftests/powerpc/math/fpu_asm.S
 create mode 100644 tools/testing/selftests/powerpc/math/fpu_preempt.c
 create mode 100644 tools/testing/selftests/powerpc/math/fpu_signal.c
 create mode 100644 tools/testing/selftests/powerpc/math/fpu_syscall.c
 create mode 100644 tools/testing/selftests/powerpc/math/vmx_asm.S
 create mode 100644 tools/testing/selftests/powerpc/math/vmx_preempt.c
 create mode 100644 tools/testing/selftests/powerpc/math/vmx_signal.c
 create mode 100644 tools/testing/selftests/powerpc/math/vmx_syscall.c

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2.7.0