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arm64: perf: Correct the event index in sysfs

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commit 539707caa1 upstream.

When PMU event ID is equal or greater than 0x4000, it will be reduced
by 0x4000 and it is not the raw number in the sysfs. Let's correct it
and obtain the raw event ID.

Before this patch:
cat /sys/bus/event_source/devices/armv8_pmuv3_0/events/sample_feed
event=0x001
After this patch:
cat /sys/bus/event_source/devices/armv8_pmuv3_0/events/sample_feed
event=0x4001

Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1592487344-30555-3-git-send-email-zhangshaokun@hisilicon.com
[will: fixed formatting of 'if' condition]
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shaokun Zhang 2020-06-18 21:35:44 +08:00 committed by Greg Kroah-Hartman
parent 8c14312213
commit ab58cc0331
1 changed files with 8 additions and 5 deletions
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13
arch/arm64/kernel/perf_event.c
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@ -155,7 +155,7 @@ armv8pmu_events_sysfs_show(struct device *dev,
pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
return sprintf(page, "event=0x%03llx\n", pmu_attr->id);
return sprintf(page, "event=0x%04llx\n", pmu_attr->id);
}
#define ARMV8_EVENT_ATTR(name, config) \
@ -303,10 +303,13 @@ armv8pmu_event_attr_is_visible(struct kobject *kobj,
test_bit(pmu_attr->id, cpu_pmu->pmceid_bitmap))
return attr->mode;
pmu_attr->id -= ARMV8_PMUV3_EXT_COMMON_EVENT_BASE;
if (pmu_attr->id < ARMV8_PMUV3_MAX_COMMON_EVENTS &&
test_bit(pmu_attr->id, cpu_pmu->pmceid_ext_bitmap))
return attr->mode;
if (pmu_attr->id >= ARMV8_PMUV3_EXT_COMMON_EVENT_BASE) {
u64 id = pmu_attr->id - ARMV8_PMUV3_EXT_COMMON_EVENT_BASE;
if (id < ARMV8_PMUV3_MAX_COMMON_EVENTS &&
test_bit(id, cpu_pmu->pmceid_ext_bitmap))
return attr->mode;
}
return 0;
}