drivers/perf: arm_pmu: manage interrupts per-cpu

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When requesting or freeing interrupts, we use platform_get_irq() to find
relevant irqs, backing this up with additional information in an
optional irq_affinity table.

This means that our irq request and free paths are tied to a
platform_device, and our request path must jump through a number of
hoops in order to determine the required affinity of each interrupt.

Given that the affinity must be static, we can compute the affinity once
up-front at probe time, simplifying the irq request and free paths. By
recording interrupts in a per-cpu data structure, we simplify a few
paths, and permit a subsequent rework of the request and free paths.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
[will: rename local nr_irqs variable to avoid conflict with global]
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Mark Rutland 2017-03-10 10:46:14 +00:00 • committed by Will Deacon

parent 2681f01842

commit 7ed98e0168

2 changed files with 166 additions and 151 deletions

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include/linux/perf/arm_pmu.h

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