Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64...

[cascardo/linux.git] / drivers / perf / arm_pmu.c

diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index f5e1008..3037081 100644 (file)
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -534,6 +534,24 @@ static int armpmu_filter_match(struct perf_event *event)
        return cpumask_test_cpu(cpu, &armpmu->supported_cpus);
 }
 
+static ssize_t armpmu_cpumask_show(struct device *dev,
+                                  struct device_attribute *attr, char *buf)
+{
+       struct arm_pmu *armpmu = to_arm_pmu(dev_get_drvdata(dev));
+       return cpumap_print_to_pagebuf(true, buf, &armpmu->supported_cpus);
+}
+
+static DEVICE_ATTR(cpus, S_IRUGO, armpmu_cpumask_show, NULL);
+
+static struct attribute *armpmu_common_attrs[] = {
+       &dev_attr_cpus.attr,
+       NULL,
+};
+
+static struct attribute_group armpmu_common_attr_group = {
+       .attrs = armpmu_common_attrs,
+};
+
 static void armpmu_init(struct arm_pmu *armpmu)
 {
        atomic_set(&armpmu->active_events, 0);
@@ -549,7 +567,10 @@ static void armpmu_init(struct arm_pmu *armpmu)
                .stop           = armpmu_stop,
                .read           = armpmu_read,
                .filter_match   = armpmu_filter_match,
+               .attr_groups    = armpmu->attr_groups,
        };
+       armpmu->attr_groups[ARMPMU_ATTR_GROUP_COMMON] =
+               &armpmu_common_attr_group;
 }
 
 /* Set at runtime when we know what CPU type we are. */
@@ -602,7 +623,7 @@ static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
        irqs = min(pmu_device->num_resources, num_possible_cpus());
 
        irq = platform_get_irq(pmu_device, 0);
-       if (irq >= 0 && irq_is_percpu(irq)) {
+       if (irq > 0 && irq_is_percpu(irq)) {
                on_each_cpu_mask(&cpu_pmu->supported_cpus,
                                 cpu_pmu_disable_percpu_irq, &irq, 1);
                free_percpu_irq(irq, &hw_events->percpu_pmu);
@@ -616,7 +637,7 @@ static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
                        if (!cpumask_test_and_clear_cpu(cpu, &cpu_pmu->active_irqs))
                                continue;
                        irq = platform_get_irq(pmu_device, i);
-                       if (irq >= 0)
+                       if (irq > 0)
                                free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, cpu));
                }
        }
@@ -638,7 +659,7 @@ static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
        }
 
        irq = platform_get_irq(pmu_device, 0);
-       if (irq >= 0 && irq_is_percpu(irq)) {
+       if (irq > 0 && irq_is_percpu(irq)) {
                err = request_percpu_irq(irq, handler, "arm-pmu",
                                         &hw_events->percpu_pmu);
                if (err) {
@@ -919,7 +940,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
 
                /* Check the IRQ type and prohibit a mix of PPIs and SPIs */
                irq = platform_get_irq(pdev, i);
-               if (irq >= 0) {
+               if (irq > 0) {
                        bool spi = !irq_is_percpu(irq);
 
                        if (i > 0 && spi != using_spi) {
@@ -970,7 +991,7 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
        if (cpumask_weight(&pmu->supported_cpus) == 0) {
                int irq = platform_get_irq(pdev, 0);
 
-               if (irq >= 0 && irq_is_percpu(irq)) {
+               if (irq > 0 && irq_is_percpu(irq)) {
                        /* If using PPIs, check the affinity of the partition */
                        int ret;
 
@@ -1029,7 +1050,7 @@ 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);
        }
@@ -1039,6 +1060,7 @@ int arm_pmu_device_probe(struct platform_device *pdev,
                goto out_free;
        }
 
+
        ret = cpu_pmu_init(pmu);
        if (ret)
                goto out_free;