kernel.git/arch/arc/kernel/irq.c, branch linux-4.13.y

ARC: [intc-*] Do a domain lookup in primary handler for hwirq -> linux virq

2016-05-09T04:02:30Z

The primary interrupt handler arch_do_IRQ() was passing hwirq as linux virq to core code. This was fragile and worked so far as we only had legacy/linear domains. This came out of a rant by Marc Zyngier. http://lists.infradead.org/pipermail/linux-snps-arc/2015-December/000298.html Cc: Marc Zyngier Cc: Thomas Gleixner Cc: Noam Camus Signed-off-by: Vineet Gupta

ARC: opencode arc_request_percpu_irq

2016-05-09T04:02:28Z

- The idea is to remove the API usage since it has a subltle design flaw - relies on being called on cpu0 first. This is true for some early per cpu irqs such as TIMER/IPI, but not for late probed per cpu peripherals such a perf. And it's usage in perf has already bitten us once: see c6317bc7c5ab ("ARCv2: perf: Ensure perf intr gets enabled on all cores") where we ended up open coding it anyways - The seeming duplication will go away once we start using cpu notifier for timer setup Signed-off-by: Vineet Gupta

ARC: [intc-compact] setup TIMER as percpu_dev

2016-05-09T04:02:28Z

This removes the quirk from arc_request_percpu_irq() and paves way for future simplifications Signed-off-by: Vineet Gupta

ARC: smp: Rename platform hook @init_cpu_smp -> @init_per_cpu

2015-12-17T07:26:56Z

Makes it similar to smp_ops which also has callback with same name Signed-off-by: Vineet Gupta

ARC: rename smp operation init_irq_cpu() to init_per_cpu()

2015-12-17T07:26:43Z

This will better reflect its description i.e. "any needed setup..." and not just do an "IPI request". Signed-off-by: Noam Camus Acked-by: Vineet Gupta Signed-off-by: Vineet Gupta

ARC: intc: Document arc_request_percpu_irq() better

2015-12-12T10:34:12Z

Signed-off-by: Vineet Gupta

ARC: intc: No need to clear IRQ_NOAUTOEN

2015-12-12T10:33:59Z

arc_request_percpu_irq() is called by all cores to request/enable percpu irq. It has some "prep" calls needed by genirq: - setup percpu devid - disable IRQ_NOAUTOEN However given that enable_percpu_irq() is called enayways, latter can be avoided. We are now left with irq_set_percpu_devid() quirk and that too for ARCompact builds only, since previous patch updated ARCv2 intc to do this in the "right" place, i.e. irq map function. By next release, this will ultimately be fixed for ARCompact as well. Cc: Marc Zyngier Cc: Thomas Gleixner Cc: Alexey Brodkin Cc: linux-snps-arc@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Vineet Gupta

ARC: smp: Introduce smp hook @init_irq_cpu called for all cores

2015-10-28T10:43:41Z

Note this is not part of platform owned static machine_desc, but more of device owned plat_smp_ops (rather misnamed) which a IPI provider or some such typically defines. This will help us seperate out the IPI registration from platform specific init_cpu_smp() into device specific init_irq_cpu() Signed-off-by: Vineet Gupta

ARC: smp: Rename platform hook @init_smp -> @init_cpu_smp

2015-10-28T10:43:40Z

This conveys better that it is called for each cpu Signed-off-by: Vineet Gupta

ARC: remove @init_time, @init_irq platform callbacks

2015-10-28T10:43:39Z

These are not in use for ARC platforms. Moreover DT mechanims exist to probe them w/o explicit platform calls. - clocksource drivers can use CLOCKSOURCE_OF_DECLARE() - intc IRQCHIP_DECLARE() calls + cascading inside DT allows external intc to be probed automatically Signed-off-by: Vineet Gupta