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Commit 5d7ee877 authored by Will Deacon's avatar Will Deacon
Browse files

arm64: perf: add support for Cortex-A72 



Cortex-A72 has a PMUv3 implementation that is compatible with the PMU
implemented by Cortex-A57.

This patch hooks up the new compatible string so that the Cortex-A57
event mappings are used.

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 57d74123

Documentation/devicetree/bindings/arm/pmu.txt

+1 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ Required properties: 
- compatible : should be one of

	"apm,potenza-pmu"

	"arm,armv8-pmuv3"

	"arm,cortex-a72-pmu"

	"arm,cortex-a57-pmu"

	"arm,cortex-a53-pmu"

	"arm,cortex-a17-pmu"

arch/arm64/kernel/perf_event.c

+12 −1
Original line number Diff line number Diff line
@@ -90,7 +90,7 @@ 
/* ARMv8 Cortex-A53 specific event types. */

#define ARMV8_A53_PERFCTR_PREFETCH_LINEFILL			0xC2



/* ARMv8 Cortex-A57 specific event types. */

/* ARMv8 Cortex-A57 and Cortex-A72 specific event types. */

#define ARMV8_A57_PERFCTR_L1_DCACHE_ACCESS_LD			0x40

#define ARMV8_A57_PERFCTR_L1_DCACHE_ACCESS_ST			0x41

#define ARMV8_A57_PERFCTR_L1_DCACHE_REFILL_LD			0x42
@@ -120,6 +120,7 @@ static const unsigned armv8_a53_perf_map[PERF_COUNT_HW_MAX] = { 
	[PERF_COUNT_HW_BUS_CYCLES]		= ARMV8_PMUV3_PERFCTR_BUS_CYCLES,

};



/* ARM Cortex-A57 and Cortex-A72 events mapping. */

static const unsigned armv8_a57_perf_map[PERF_COUNT_HW_MAX] = {

	PERF_MAP_ALL_UNSUPPORTED,

	[PERF_COUNT_HW_CPU_CYCLES]		= ARMV8_PMUV3_PERFCTR_CLOCK_CYCLES,
@@ -801,10 +802,20 @@ static int armv8_a57_pmu_init(struct arm_pmu *cpu_pmu) 
	return armv8pmu_probe_num_events(cpu_pmu);

}



static int armv8_a72_pmu_init(struct arm_pmu *cpu_pmu)

{

	armv8_pmu_init(cpu_pmu);

	cpu_pmu->name			= "armv8_cortex_a72";

	cpu_pmu->map_event		= armv8_a57_map_event;

	cpu_pmu->pmu.attr_groups	= armv8_pmuv3_attr_groups;

	return armv8pmu_probe_num_events(cpu_pmu);

}



static const struct of_device_id armv8_pmu_of_device_ids[] = {

	{.compatible = "arm,armv8-pmuv3",	.data = armv8_pmuv3_init},

	{.compatible = "arm,cortex-a53-pmu",	.data = armv8_a53_pmu_init},

	{.compatible = "arm,cortex-a57-pmu",	.data = armv8_a57_pmu_init},

	{.compatible = "arm,cortex-a72-pmu",	.data = armv8_a72_pmu_init},

	{},

};