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Commit 7e691c25 authored by Neil Leeder's avatar Neil Leeder
Browse files

perf: arm64: add support for kryo pmu 



Initialise the kryo PMU driver if it is detected.

Change-Id: Idc8c1d515c2d913e8d79af5287aaa8154d7be7f4
Signed-off-by: default avatarNeil Leeder <nleeder@codeaurora.org>
parent d08f000c

Documentation/devicetree/bindings/arm/pmu.txt

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ Required properties: 
	"arm,arm11mpcore-pmu"

	"arm,arm1176-pmu"

	"arm,arm1136-pmu"

	"qcom,kryo-pmuv3"

	"qcom,krait-pmu"

- interrupts : 1 combined interrupt or 1 per core. If the interrupt is a per-cpu

               interrupt (PPI) then 1 interrupt should be specified.

arch/arm64/kernel/perf_debug.c

+2 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2014, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -36,6 +36,7 @@ static char *descriptions = 
	"14 Perf: arm64: stop counters when going into hotplug\n"

	"15 Perf: arm64: make debug dir handle exportable\n"

	"16 Perf: arm64: add perf trace user\n"

	"17 Perf: arm64: add support for kryo pmu\n"

;



static ssize_t desc_read(struct file *fp, char __user *buf,

arch/arm64/kernel/perf_event.c

+15 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/uaccess.h>

#include <linux/cpu_pm.h>

#include <linux/debugfs.h>

#include <linux/of.h>



#include <asm/cputype.h>

#include <asm/irq.h>
@@ -1627,14 +1628,28 @@ static struct notifier_block perf_cpu_pm_notifier_block = { 
 */

static const struct of_device_id armpmu_of_device_ids[] = {

	{.compatible = "arm,armv8-pmuv3"},

	{.compatible = "qcom,kryo-pmuv3", .data = kryo_pmu_init},

	{},

};



static int armpmu_device_probe(struct platform_device *pdev)

{

	struct device_node *node = pdev->dev.of_node;

	const struct of_device_id *of_id;

	int (*init_fn)(struct arm_pmu *);



	if (!cpu_pmu)

		return -ENODEV;



	if (node) {

		of_id = of_match_node(armpmu_of_device_ids, node);

		if (of_id) {

			init_fn = of_id->data;

			if (init_fn)

				init_fn(cpu_pmu);

		}

	}



	cpu_pmu->plat_device = pdev;

	cpu_pmu->percpu_irq = platform_get_irq(cpu_pmu->plat_device, 0);

	return 0;