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arm64: perf: add support for Cortex-A72

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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: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2015-12-22 14:45:35 +00:00
parent 57d7412395
commit 5d7ee87708
2 changed files with 13 additions and 1 deletions
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1
Documentation/devicetree/bindings/arm/pmu.txt
View File

@ -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"

13
arch/arm64/kernel/perf_event.c
View File

@ -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},
{},
};