From: Shaokun Zhang zhangshaokun@hisilicon.com
commit 539707caa1a89ee4efc57b4e4231c20c46575ccc 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@his... [will: fixed formatting of 'if' condition] Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm64/kernel/perf_event.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
--- a/arch/arm64/kernel/perf_event.c +++ b/arch/arm64/kernel/perf_event.c @@ -155,7 +155,7 @@ armv8pmu_events_sysfs_show(struct device
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) \ @@ -244,10 +244,13 @@ armv8pmu_event_attr_is_visible(struct ko 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; }