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From: Paul Burton <paul.burton@imgtec.com>
To: Thomas Gleixner <tglx@linutronix.de>, Ralf Baechle <ralf@linux-mips.org>
Cc: <dianders@chromium.org>, James Hogan <james.hogan@imgtec.com>,
	Brian Norris <briannorris@chromium.org>,
	Jason Cooper <jason@lakedaemon.net>, <jeffy.chen@rock-chips.com>,
	Marc Zyngier <marc.zyngier@arm.com>,
	<linux-kernel@vger.kernel.org>, <linux-mips@linux-mips.org>,
	<tfiga@chromium.org>, Paul Burton <paul.burton@imgtec.com>
Subject: [RFC PATCH v1 0/9] Support shared percpu interrupts; clean up MIPS hacks
Date: Thu, 7 Sep 2017 16:25:33 -0700
Message-ID: <20170907232542.20589-1-paul.burton@imgtec.com> (raw)
In-Reply-To: <1682867.tATABVWsV9@np-p-burton>

This series introduces support for percpu shared interrupts and makes
use of this support to clean up some hacks that have been used to
support such interrupts on MIPS.

- Patch 1 allows users of shared interrupts to opt into IRQ_NOAUTOEN
  behaviour & avoid warnings from doing so.

- Patch 2 introduces support for shared percpu_devid interrupts.

- Patch 3 introduces a helper allowing users to detect whether an
  interrupt is a percpu_devid interrupt or not, which is useful
  during the transition phase where interrupts may be either.

- Patches 4 & 5 removes an ugly custom implementation of shared
  interrupts between the MIPS cevt-r4k timer driver & users of
  performance counters, in favor of using standard IRQF_SHARED &
  multiple handlers.

- Patches 6 & 7 add percpu interrupt support to the MIPS perf &
  cevt-r4k timer drivers respectively.

- Patch 8 configures the MIPS cop 0 count/compare, fast debug channel &
  performance counter overflow interrupts as percpu_devid when they are
  mapped by the irqchip-mips-cpu driver.

- Patch 9 removes a hack from the irqchip-mips-gic driver that was
  used to enable & disable an interrupt across all CPUs, which is no
  longer necessary with users of those interrupts using the percpu
  interrupt APIs correctly. This mirrors patch 8 for systems where we
  map the CPU local interrupts via the GIC.

There's a little more work necessary before this could go in - the
MIPS oprofile code needs adjusting to use the percpu interrupt APIs, as
does the fast debug channel driver.

Applies atop next-20170905.

Paul Burton (9):
  genirq: Allow shared interrupt users to opt into IRQ_NOAUTOEN
  genirq: Support shared per_cpu_devid interrupts
  genirq: Introduce irq_is_percpu_devid()
  MIPS: Remove perf_irq interrupt sharing fallback
  MIPS: Remove perf_irq
  MIPS: perf: percpu_devid interrupt support
  MIPS: cevt-r4k: percpu_devid interrupt support
  irqchip: mips-cpu: Set timer, FDC & perf interrupts percpu_devid
  irqchip: mips-gic: Remove gic_all_vpes_local_irq_controller

 arch/mips/include/asm/time.h            |  1 -
 arch/mips/kernel/cevt-r4k.c             | 77 ++++++++++++-----------------
 arch/mips/kernel/perf_event_mipsxx.c    | 71 +++++++++++----------------
 arch/mips/kernel/time.c                 |  9 ----
 arch/mips/kernel/traps.c                |  2 +-
 arch/mips/oprofile/op_impl.h            |  2 -
 arch/mips/oprofile/op_model_loongson3.c | 39 +++++++--------
 arch/mips/oprofile/op_model_mipsxx.c    | 10 +---
 drivers/irqchip/irq-mips-cpu.c          |  9 +++-
 drivers/irqchip/irq-mips-gic.c          | 69 +++-----------------------
 include/linux/interrupt.h               |  2 +
 include/linux/irqdesc.h                 |  8 +++
 kernel/irq/chip.c                       |  8 +--
 kernel/irq/handle.c                     |  8 ++-
 kernel/irq/manage.c                     | 86 +++++++++++++++++++++++++--------
 kernel/irq/settings.h                   |  5 ++
 16 files changed, 189 insertions(+), 217 deletions(-)

-- 
2.14.1

       reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1682867.tATABVWsV9@np-p-burton>
2017-09-07 23:25 ` Paul Burton [this message]
2017-09-07 23:25   ` [RFC PATCH v1 1/9] genirq: Allow shared interrupt users to opt into IRQ_NOAUTOEN Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 2/9] genirq: Support shared per_cpu_devid interrupts Paul Burton
2017-09-25 21:06     ` Thomas Gleixner
2017-09-26 12:00       ` Thomas Gleixner
2017-10-19 14:08         ` Thomas Gleixner
2017-09-07 23:25   ` [RFC PATCH v1 3/9] genirq: Introduce irq_is_percpu_devid() Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 4/9] MIPS: Remove perf_irq interrupt sharing fallback Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 5/9] MIPS: Remove perf_irq Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 6/9] MIPS: perf: percpu_devid interrupt support Paul Burton
2017-10-19 14:12     ` Thomas Gleixner
2017-09-07 23:25   ` [RFC PATCH v1 7/9] MIPS: cevt-r4k: " Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 8/9] irqchip: mips-cpu: Set timer, FDC & perf interrupts percpu_devid Paul Burton
2017-09-07 23:25   ` [RFC PATCH v1 9/9] irqchip: mips-gic: Remove gic_all_vpes_local_irq_controller Paul Burton

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