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perf/x86: Support sysfs files depending on SMT status

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Add a way to show different sysfs events attributes depending on
HyperThreading is on or off. This is difficult to determine
early at boot, so we just do it dynamically when the sysfs
attribute is read.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: acme@kernel.org
Cc: jolsa@kernel.org
Link: http://lkml.kernel.org/r/1463703002-19686-3-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andi Kleen
2016-05-19 17:09:56 -07:00
committed by Ingo Molnar
parent 70b8301f6b
commit fc07e9f983
3 changed files with 40 additions and 0 deletions
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10
arch/x86/events/perf_event.h
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@@ -668,6 +668,14 @@ static struct perf_pmu_events_attr event_attr_##v = { \
.event_str = str, \
};
#define EVENT_ATTR_STR_HT(_name, v, noht, ht) \
static struct perf_pmu_events_ht_attr event_attr_##v = { \
.attr = __ATTR(_name, 0444, events_ht_sysfs_show, NULL),\
.id = 0, \
.event_str_noht = noht, \
.event_str_ht = ht, \
}
extern struct x86_pmu x86_pmu __read_mostly;
static inline bool x86_pmu_has_lbr_callstack(void)
@@ -803,6 +811,8 @@ struct attribute **merge_attr(struct attribute **a, struct attribute **b);
ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr,
char *page);
ssize_t events_ht_sysfs_show(struct device *dev, struct device_attribute *attr,
char *page);
#ifdef CONFIG_CPU_SUP_AMD