[RFC PATCH v2 0/6] powerpc: Support context tracking for Power pSeries

Li Zhong
2013-03-29T10:02:04Z

These patches try to support context tracking for Power arch, beginning with
64-bit pSeries. The codes are ported from that of the x86_64, and in each
patch, I listed the corresponding patch for x86.

Would you please help review and give your comments?

v2:

I rebased the patches against 3.9-rcs, and also added a patch to replace
the exception handling with the generic code in tip timers/nohz.

I assume these patches would get in through powerpc tree, so I didn't combine
the new patch (#6) with the original one (#2). So that if powerpc tree picks
these, it could pick the first five patches, and apply patch #6 later
when the dependency enters into powerpc tree (maybe on some 3.10-rcs).

I'm also wondering whether it is possible for these to go through
tip timers/nohz, so for now, patches #6 and #2 could be combined into one, and
no need to worry about the issues caused by arch/common code merging. And it
might also make future changes easier.

Thanks, Zhong

Li Zhong (6):
powerpc: Syscall hooks for context tracking subsystem
powerpc: Exception hooks for context tracking subsystem
powerpc: Exit user context on notify resume
powerpc: Use the new schedule_user API on userspace preemption
powerpc: select HAVE_CONTEXT_TRACKING for pSeries
powerpc: Use generic code for exception handling

arch/powerpc/include/asm/context_tracking.h | 10 +++
arch/powerpc/include/asm/thread_info.h | 7 ++-
arch/powerpc/kernel/entry_64.S | 3 +-
arch/powerpc/kernel/ptrace.c | 5 ++
arch/powerpc/kernel/signal.c | 5 ++
arch/powerpc/kernel/traps.c | 91 ++++++++++++++++++++-------
arch/powerpc/mm/fault.c | 16 ++++-
arch/powerpc/mm/hash_utils_64.c | 38 ++++++++---
arch/powerpc/platforms/pseries/Kconfig | 1 +
9 files changed, 140 insertions(+), 36 deletions(-)
create mode 100644 arch/powerpc/include/asm/context_tracking.h

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