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arm64: pmu: add fallback probe table

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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 <msalter@redhat.com>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Salter 2016-09-14 17:32:29 -05:00 committed by Will Deacon
parent 55d5c4ab06
commit dbee3a74ef
2 changed files with 13 additions and 2 deletions
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13
arch/arm64/kernel/perf_event.c
View File

@ -24,6 +24,7 @@
#include <asm/sysreg.h>
#include <asm/virt.h>
#include <linux/acpi.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
@ -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 = {

2
drivers/perf/arm_pmu.c
View File

@ -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);
}