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ARM: perf: remove unused PMU probing code

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The ARM perf backend can discover the type of PMU it needs to drive
either from DT or by probing a CPU it is running on. For
Cortex-A{5,7,15} there are no platforms in mainline not using dt, and
this probing won't work well for big.LITTLE systems with heterogeneous
PMUs.

This patch drops the probing for those CPUs, relying on information from
dt instead. Future platforms should describe their PMU(s) with dt.

Suggested-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2014-02-18 10:31:10 +00:00 committed by Will Deacon
parent 5f5092e72c
commit 51e5fef620
1 changed files with 0 additions and 9 deletions
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9
arch/arm/kernel/perf_event_cpu.c
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@ -267,15 +267,6 @@ static int probe_current_pmu(struct arm_pmu *pmu)
case ARM_CPU_PART_CORTEX_A9: case ARM_CPU_PART_CORTEX_A9:
ret = armv7_a9_pmu_init(pmu); ret = armv7_a9_pmu_init(pmu);
break; break;
case ARM_CPU_PART_CORTEX_A5:
ret = armv7_a5_pmu_init(pmu);
break;
case ARM_CPU_PART_CORTEX_A15:
ret = armv7_a15_pmu_init(pmu);
break;
case ARM_CPU_PART_CORTEX_A7:
ret = armv7_a7_pmu_init(pmu);
break;
} }
/* Intel CPUs [xscale]. */ /* Intel CPUs [xscale]. */
} else if (implementor == ARM_CPU_IMP_INTEL) { } else if (implementor == ARM_CPU_IMP_INTEL) {