cyring/gist:14556fc52e5bea5a564bdda5a0852f09

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ARM PMU

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gistfile1.txt

Orange Pi 5+ (DTS)

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cyring commented Dec 31, 2023 •

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Disable CONFIG_ARM_PMUV3 w/ kernel 6
Disable CONFIG_ARM_PMU w/ kernel 5
Disable CONFIG_PERF_EVENTS
Disable CONFIG_KVM
drivers/perf/arm_pmuv3.c

static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
	armv8pmu_stop(cpu_pmu);

	armv8pmu_start(cpu_pmu);

	return IRQ_HANDLED;
}

armv8pmu_stop() -> armv8pmu_pmcr_write() -> write_pmcr() -> write_sysreg() -> __write_sysreg() -> pmcr_el0

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