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Commit 718fc96a authored by Neil Leeder's avatar Neil Leeder
Browse files

msm: perf: initialise krait perf L2 counter enables 



Clear the L2 counter enables at initialisation.
They are undefined out of reset.

Change-Id: I957106012625ae09efec47d4f657381963d87a5a
Signed-off-by: default avatarNeil Leeder <nleeder@codeaurora.org>
parent 1502243d

arch/arm/mach-msm/perf_debug.c

+1 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ static char *descriptions = 
	" 2 Perf: keep events across hotplug\n"

	" 3 Perf: bring CPU online if needed when disabling irq\n"

	" 4 Perf: Support sw events across hotplug\n"

	" 5 msm: perf: initialise krait perf L2 counter enables\n"

;



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

arch/arm/mach-msm/perf_event_msm_krait_l2.c

+7 −0
Original line number Diff line number Diff line
@@ -600,6 +600,8 @@ static struct platform_driver krait_l2_pmu_driver = { 


static int __init register_krait_l2_pmu_driver(void)

{

	int i;



	/* Reset all ctrs */

	set_l2_indirect_reg(L2PMCR, L2PMCR_RESET_ALL);
@@ -621,6 +623,11 @@ static int __init register_krait_l2_pmu_driver(void) 
	/* Avoid spurious interrupt if any */

	get_reset_pmovsr();



	/* Clear counter enables */

	disable_counter(l2_cycle_ctr_idx);

	for (i = 0; i < total_l2_ctrs; i++)

		disable_counter(i);



	return platform_driver_register(&krait_l2_pmu_driver);

}

device_initcall(register_krait_l2_pmu_driver);