From dbee3a74ef2c73acc4eb31cee7a60d5e46767a41 Mon Sep 17 00:00:00 2001 From: Mark Salter Date: Wed, 14 Sep 2016 17:32:29 -0500 Subject: [PATCH] arm64: pmu: add fallback probe table In preparation for ACPI support, add a pmu_probe_info table to the arm_pmu_device_probe() call. This table gets used when probing in the absence of a devicetree node for PMU. Signed-off-by: Mark Salter Signed-off-by: Jeremy Linton Signed-off-by: Will Deacon --- arch/arm64/kernel/perf_event.c | 13 ++++++++++++- drivers/perf/arm_pmu.c | 2 +- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c index 03a13661bfce..0bcf2fb7d26e 100644 --- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -24,6 +24,7 @@ #include #include +#include #include #include #include @@ -1056,9 +1057,19 @@ static const struct of_device_id armv8_pmu_of_device_ids[] = { {}, }; +static const struct pmu_probe_info armv8_pmu_probe_table[] = { + PMU_PROBE(0, 0, armv8_pmuv3_init), /* if all else fails... */ + { /* sentinel value */ } +}; + static int armv8_pmu_device_probe(struct platform_device *pdev) { - return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids, NULL); + if (acpi_disabled) + return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids, + NULL); + + return arm_pmu_device_probe(pdev, armv8_pmu_of_device_ids, + armv8_pmu_probe_table); } static struct platform_driver armv8_pmu_driver = { diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index c36913ad3a09..77ac1ccb39ed 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -1048,7 +1048,7 @@ int arm_pmu_device_probe(struct platform_device *pdev, ret = of_pmu_irq_cfg(pmu); if (!ret) ret = init_fn(pmu); - } else { + } else if (probe_table) { cpumask_setall(&pmu->supported_cpus); ret = probe_current_pmu(pmu, probe_table); } -- 2.20.1