[PATCH v6 00/39] powerpc: interrupt wrappers

[Nicholas Piggin <npiggin@gmail.com>]

This adds interrupt handler wrapper functions, similar to the
generic / x86 code, and moves several common operations into them
from either asm or open coded in the individual handlers.

This series is based on upstream plus "powerpc/64s: fix scv entry
fallback flush vs interrupt".

Since v1:
- Fixed a couple of compile issues
- Fixed perf weirdness (sometimes NMI, sometimes not)
- Also move irq_enter/exit into wrappers

Since v2:
- Rebased upstream
- Took code in patch 3 from Christophe
- Fixed some compile errors from 0day

Since v3:
- Rebased
- Split Christophe's 32s DABR patch into its own patch
- Fixed missing asm from 32s on patch 3 noticed by Christophe.
- Moved changes around, split out one more patch (patch 9) to make
  changes more logical and atomic.
- Add comments explaining _RAW handlers (SLB, HPTE) interrupts better

Since v4:
- Rebased (on top of scv fallback flush fix)
- Rearranged a few changes into different patches from Christophe,
  e.g., the ___do_page_fault change from patch 2 to 10. I didn't
  do everything (e.g., splitting to update __hash_page to drop the
  msr argument before the bulk of patch 2 seemed like churn without
  much improvement), and also other things like removing the new
  ___do_page_fault variant if we can change hash fault context tracking
  I didn't get time to completely investigate and implement. I think
  this shouldn't be a showstopper though we can make more improvements
  as we go.

Since v5:
- Lots of good review suggestions from Christophe, see v5 email threads.
- Major change being do_break is left in asm and selected early as an
  alternate interrupt handler now, which is a smaller step and matches
  other subarchs better.
- Rearranged patches, split, moved things, bug fixes, etc.
- Converted a few more missed exception handlers for debug and ras
  stuff.
- Found a few relatively minor bugs, comment updates, and tidy ups that
  don't really have to be part of this series but might as well be.

Thanks,
Nick

Christophe Leroy (1):
  powerpc/32s: move DABR match out of handle_page_fault

Nicholas Piggin (38):
  KVM: PPC: Book3S HV: Context tracking exit guest context before
    enabling irqs
  powerpc/64s: move DABR match out of handle_page_fault
  powerpc/64s: move the hash fault handling logic to C
  powerpc: remove arguments from fault handler functions
  powerpc: do_break get registers from regs
  powerpc: bad_page_fault get registers from regs
  powerpc: rearrange do_page_fault error case to be inside
    exception_enter
  powerpc/64s: move bad_page_fault handling to C
  powerpc/64s: split do_hash_fault
  powerpc/mm: Remove stale do_page_fault comment referring to SLB faults
  powerpc/64s: slb comment update
  powerpc/traps: add NOKPROBE_SYMBOL for sreset and mce
  powerpc/perf: move perf irq/nmi handling details into traps.c
  powerpc/time: move timer_broadcast_interrupt prototype to asm/time.h
  powerpc: add and use unknown_async_exception
  powerpc/fsl_booke/32: CacheLockingException remove args
  powerpc: DebugException remove args
  powerpc/cell: tidy up pervasive declarations
  powerpc: introduce die_mce
  powerpc/mce: ensure machine check handler always tests RI
  powerpc: improve handling of unrecoverable system reset
  powerpc: interrupt handler wrapper functions
  powerpc: add interrupt wrapper entry / exit stub functions
  powerpc: convert interrupt handlers to use wrappers
  powerpc: add interrupt_cond_local_irq_enable helper
  powerpc/64: context tracking remove _TIF_NOHZ
  powerpc/64s/hash: improve context tracking of hash faults
  powerpc/64: context tracking move to interrupt wrappers
  powerpc/64: add context tracking to asynchronous interrupts
  powerpc: handle irq_enter/irq_exit in interrupt handler wrappers
  powerpc/64s: move context tracking exit to interrupt exit path
  powerpc/64s: reconcile interrupts in C
  powerpc/64: move account_stolen_time into its own function
  powerpc/64: entry cpu time accounting in C
  powerpc: move NMI entry/exit code into wrapper
  powerpc/64s: move NMI soft-mask handling to C
  powerpc/64s: runlatch interrupt handling in C
  powerpc/64s: power4 nap fixup in C

 arch/powerpc/Kconfig                       |   1 -
 arch/powerpc/include/asm/asm-prototypes.h  |  29 --
 arch/powerpc/include/asm/bug.h             |   9 +-
 arch/powerpc/include/asm/cputime.h         |  14 +
 arch/powerpc/include/asm/debug.h           |   4 -
 arch/powerpc/include/asm/hw_irq.h          |   9 -
 arch/powerpc/include/asm/interrupt.h       | 434 +++++++++++++++++++++
 arch/powerpc/include/asm/ppc_asm.h         |  24 --
 arch/powerpc/include/asm/processor.h       |   1 +
 arch/powerpc/include/asm/thread_info.h     |  10 +-
 arch/powerpc/include/asm/time.h            |   2 +
 arch/powerpc/kernel/dbell.c                |   9 +-
 arch/powerpc/kernel/entry_32.S             |  25 +-
 arch/powerpc/kernel/exceptions-64e.S       |   8 +-
 arch/powerpc/kernel/exceptions-64s.S       | 310 ++-------------
 arch/powerpc/kernel/head_40x.S             |  11 +-
 arch/powerpc/kernel/head_8xx.S             |  11 +-
 arch/powerpc/kernel/head_book3s_32.S       |  14 +-
 arch/powerpc/kernel/head_booke.h           |   6 +-
 arch/powerpc/kernel/head_fsl_booke.S       |   6 +-
 arch/powerpc/kernel/idle_book3s.S          |   4 +
 arch/powerpc/kernel/irq.c                  |   7 +-
 arch/powerpc/kernel/mce.c                  |  16 +-
 arch/powerpc/kernel/process.c              |   8 +-
 arch/powerpc/kernel/ptrace/ptrace.c        |   4 -
 arch/powerpc/kernel/signal.c               |   4 -
 arch/powerpc/kernel/syscall_64.c           |  30 +-
 arch/powerpc/kernel/tau_6xx.c              |   5 +-
 arch/powerpc/kernel/time.c                 |   7 +-
 arch/powerpc/kernel/traps.c                | 263 +++++++------
 arch/powerpc/kernel/watchdog.c             |  15 +-
 arch/powerpc/kvm/book3s_hv.c               |   7 +-
 arch/powerpc/kvm/book3s_hv_builtin.c       |   1 +
 arch/powerpc/kvm/booke.c                   |   1 +
 arch/powerpc/mm/book3s64/hash_utils.c      |  96 +++--
 arch/powerpc/mm/book3s64/slb.c             |  40 +-
 arch/powerpc/mm/fault.c                    |  80 ++--
 arch/powerpc/perf/core-book3s.c            |  35 +-
 arch/powerpc/perf/core-fsl-emb.c           |  25 --
 arch/powerpc/platforms/8xx/machine_check.c |   2 +-
 arch/powerpc/platforms/cell/pervasive.c    |   1 +
 arch/powerpc/platforms/cell/pervasive.h    |   3 -
 arch/powerpc/platforms/cell/ras.c          |   6 +-
 arch/powerpc/platforms/cell/ras.h          |   9 +-
 arch/powerpc/platforms/powernv/idle.c      |   1 +
 arch/powerpc/platforms/powernv/opal.c      |   2 +-
 arch/powerpc/platforms/pseries/ras.c       |   2 +-
 47 files changed, 867 insertions(+), 744 deletions(-)
 create mode 100644 arch/powerpc/include/asm/interrupt.h

-- 
2.23.0