[PATCH v1 0/4] powerpc/64s: interrupt speedups

[Nicholas Piggin]

Here's a few stragglers. The first patch was submitted already but had
some bugs with unrecoverable exceptions on HPT (current->blah being
accessed before MSR[RI] was enabled). Those should be fixed now.

The others are generally for helping asynch interrupts, which are a bit
harder to measure well but important for IO and IPIs.

After this series, the SPR accesses of the interrupt handlers for radix
are becoming pretty optimal except for PPR which we could improve on,
and virt CPU accounting which is very costly -- we might disable that
by default unless someone comes up with a good reason to keep it.

Thanks,
Nick

Nicholas Piggin (4):
  powerpc/64: handle MSR EE and RI in interrupt entry wrapper
  powerpc/64s/perf: add power_pmu_running to query whether perf is being
    used
  powerpc/64s/interrupt: Don't enable MSR[EE] in irq handlers unless
    perf is in use
  powerpc/64s/interrupt: avoid saving CFAR in some asynchronous
    interrupts

 arch/powerpc/include/asm/hw_irq.h    | 49 ++++++++++++---
 arch/powerpc/include/asm/interrupt.h | 31 ++++++++--
 arch/powerpc/kernel/dbell.c          |  3 +-
 arch/powerpc/kernel/exceptions-64s.S | 93 +++++++++++++++++++---------
 arch/powerpc/kernel/fpu.S            |  5 ++
 arch/powerpc/kernel/irq.c            |  3 +-
 arch/powerpc/kernel/time.c           | 30 ++++-----
 arch/powerpc/kernel/vector.S         |  8 +++
 arch/powerpc/perf/core-book3s.c      | 13 ++++
 9 files changed, 175 insertions(+), 60 deletions(-)

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2.23.0