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fe17a42e70
kernel_optimize_test/kernel/irq
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Marc Zyngier fe17a42e70 irqdomain: Let irq_domain_mapping display hierarchical domains 
Hierarchical domains seem to be hard to grasp, and a number of
aspiring kernel hackers find them utterly discombobulating.

In order to ease their pain, let's make them appear in
/sys/kernel/debug/irq_domain_mapping, such as the following:

   96  0x81808  MSI    0x          (null) RADIX   MSI
   96+ 0x00063  GICv2m 0xffff8003ee116980 RADIX   GICv2m
   96+ 0x00063  GICv2  0xffff00000916bfd8 LINEAR  GICv2

[output compressed to fit in a commit log]

This shows that IRQ96 is implemented by a stack of three domains,
the + sign indicating the stacking.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/20170512115538.10767-2-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2017-05-22 22:29:44 +02:00
..
affinity.c genirq/affinity: Fix calculating vectors to assign 2017-04-20 16:03:09 +02:00
autoprobe.c
chip.c genirq: Fix chained interrupt data ordering 2017-05-16 15:03:26 +02:00
cpuhotplug.c genirq: Make the cpuhotplug migration code less noisy 2015-10-22 14:34:57 +02:00
debug.h
devres.c genirq/devres: Use dev_name(dev) as default for devname 2017-02-12 19:49:25 +01:00
dummychip.c
generic-chip.c genirq/generic_chip: Verify irqs_per_chip <= 32 2016-09-02 20:20:59 +02:00
handle.c genirq: Add untracked irq handler 2016-06-18 10:00:55 +02:00
internals.h Merge branch 'irq/for-block' into irq/core 2016-07-04 12:26:05 +02:00
ipi.c genirq: Fix missing irq allocation affinity hint 2016-07-19 10:49:47 +02:00
irqdesc.c Merge branch 'irq/for-block' into irq/core 2016-09-15 20:54:40 +02:00
irqdomain.c irqdomain: Let irq_domain_mapping display hierarchical domains 2017-05-22 22:29:44 +02:00
Kconfig genirq: Add GENERIC_IRQ_IPI Kconfig symbol 2016-02-25 10:56:55 +01:00
Makefile genirq: Add a helper to spread an affinity mask for MSI/MSI-X vectors 2016-07-04 12:25:14 +02:00
manage.c pci-v4.12-changes 2017-05-08 19:03:25 -07:00
migration.c
msi.c genirq/msi: Set IRQ_DOMAIN_FLAG_MSI on MSI domain creation 2017-01-23 15:00:45 +00:00
pm.c Merge branches 'irq-urgent-for-linus' and 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-15 09:30:48 -08:00
proc.c genirq: Fix /proc/interrupts output alignment 2017-02-10 20:17:52 +01:00
resend.c
settings.h
spurious.c genirq: Clarify logic calculating bogus irqreturn_t values 2017-02-16 15:32:19 +01:00