[PATCH v4 0/5] Powerpc/Watchpoint: Few important fixes

[Ravi Bangoria]

v3: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/193339.html

v3->v4:
 - Instead of considering exception as extraneous when dar is outside of
   user specified range, analyse the instruction and check for overlap
   between user specified range and actual load/store range.
 - Add selftest for the same in perf-hwbreak.c
 - Make ptrace-hwbreak.c selftest more strict by checking address in
   check_success.
 - Support for 8xx in ptrace-hwbreak.c selftest (Build tested only)
 - Rebase to powerpc/next

@Christope, Can you please check Patch 5. I've just build-tested it
with ep88xc_defconfig.

Ravi Bangoria (5):
  Powerpc/Watchpoint: Fix length calculation for unaligned target
  Powerpc/Watchpoint: Don't ignore extraneous exceptions blindly
  Powerpc/Watchpoint: Rewrite ptrace-hwbreak.c selftest
  Powerpc/Watchpoint: Add dar outside test in perf-hwbreak.c selftest
  Powerpc/Watchpoint: Support for 8xx in ptrace-hwbreak.c selftest

 arch/powerpc/include/asm/debug.h              |   1 +
 arch/powerpc/include/asm/hw_breakpoint.h      |   9 +-
 arch/powerpc/kernel/dawr.c                    |   6 +-
 arch/powerpc/kernel/hw_breakpoint.c           |  76 ++-
 arch/powerpc/kernel/process.c                 |  46 ++
 arch/powerpc/kernel/ptrace.c                  |  37 +-
 arch/powerpc/xmon/xmon.c                      |   3 +-
 .../selftests/powerpc/ptrace/perf-hwbreak.c   | 111 +++-
 .../selftests/powerpc/ptrace/ptrace-hwbreak.c | 579 +++++++++++-------
 9 files changed, 595 insertions(+), 273 deletions(-)

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2.21.0