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| author | Peter Zijlstra <peterz@infradead.org> | 2017-08-28 12:46:50 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-29 15:09:25 +0200 |
| commit | 5da382eb6ea37e2c49ef521c636d73f6ecc3fa81 (patch) | |
| tree | ced066ba49f9924d3819d029cbebdd5e4e2ab615 /arch/x86/events/core.c | |
| parent | fc7ce9c74c3ad232b084d80148654f926d01ece7 (diff) | |
| download | blackbird-op-linux-5da382eb6ea37e2c49ef521c636d73f6ecc3fa81.tar.gz blackbird-op-linux-5da382eb6ea37e2c49ef521c636d73f6ecc3fa81.zip | |
perf/x86: Fix caps/ for !Intel
Move the 'max_precise' capability into generic x86 code where it
belongs. This fixes a sysfs splat on !Intel systems where we fail to set
x86_pmu_caps_group.atts.
Reported-and-tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: hpa@zytor.com
Fixes: 22688d1c20f5 ("x86/perf: Export some PMU attributes in caps/ directory")
Link: http://lkml.kernel.org/r/20170828104650.2u3rsim4jafyjzv2@hirez.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events/core.c')
| -rw-r--r-- | arch/x86/events/core.c | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index d5f98095a155..73a6311c8baa 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1757,10 +1757,7 @@ ssize_t x86_event_sysfs_show(char *page, u64 config, u64 event) } static struct attribute_group x86_pmu_attr_group; - -static struct attribute_group x86_pmu_caps_group = { - .name = "caps", -}; +static struct attribute_group x86_pmu_caps_group; static int __init init_hw_perf_events(void) { @@ -1808,7 +1805,14 @@ static int __init init_hw_perf_events(void) 0, x86_pmu.num_counters, 0, 0); x86_pmu_format_group.attrs = x86_pmu.format_attrs; - x86_pmu_caps_group.attrs = x86_pmu.caps_attrs; + + if (x86_pmu.caps_attrs) { + struct attribute **tmp; + + tmp = merge_attr(x86_pmu_caps_group.attrs, x86_pmu.caps_attrs); + if (!WARN_ON(!tmp)) + x86_pmu_caps_group.attrs = tmp; + } if (x86_pmu.event_attrs) x86_pmu_events_group.attrs = x86_pmu.event_attrs; @@ -2224,6 +2228,25 @@ static struct attribute_group x86_pmu_attr_group = { .attrs = x86_pmu_attrs, }; +static ssize_t max_precise_show(struct device *cdev, + struct device_attribute *attr, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", x86_pmu_max_precise()); +} + +static DEVICE_ATTR_RO(max_precise); + +static struct attribute *x86_pmu_caps_attrs[] = { + &dev_attr_max_precise.attr, + NULL +}; + +static struct attribute_group x86_pmu_caps_group = { + .name = "caps", + .attrs = x86_pmu_caps_attrs, +}; + static const struct attribute_group *x86_pmu_attr_groups[] = { &x86_pmu_attr_group, &x86_pmu_format_group, |
