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.