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s390/cpum_cf: Export event names in sysfs

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Provide PMU event attributes for supported counters and export their symbolic
names to the sysfs "events" directory.

See the /sys/devices/cpum_cf/events/ directory for a list of available counters.
Note that you might require counter set authorizations for the LPAR to use them.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2013-12-11 12:44:40 +01:00
committed by Martin Schwidefsky
parent cf48ad8327
commit c716832513
5 changed files with 358 additions and 3 deletions
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23
arch/s390/include/asm/perf_event.h
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@ -1,11 +1,18 @@
/*
* Performance event support - s390 specific definitions.
*
* Copyright IBM Corp. 2009, 2012
* Copyright IBM Corp. 2009, 2013
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
* Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/
#ifndef _ASM_S390_PERF_EVENT_H
#define _ASM_S390_PERF_EVENT_H
#ifdef CONFIG_64BIT
#include <linux/perf_event.h>
#include <linux/device.h>
#include <asm/cpu_mf.h>
/* CPU-measurement counter facility */
@ -15,7 +22,18 @@
#define PMU_F_RESERVED 0x1000
#define PMU_F_ENABLED 0x2000
#ifdef CONFIG_64BIT
/* Perf defintions for PMU event attributes in sysfs */
extern __init const struct attribute_group **cpumf_cf_event_group(void);
extern ssize_t cpumf_events_sysfs_show(struct device *dev,
struct device_attribute *attr,
char *page);
#define EVENT_VAR(_cat, _name) event_attr_##_cat##_##_name
#define EVENT_PTR(_cat, _name) (&EVENT_VAR(_cat, _name).attr.attr)
#define CPUMF_EVENT_ATTR(cat, name, id) \
PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
#define CPUMF_EVENT_PTR(cat, name) EVENT_PTR(cat, name)
/* Perf callbacks */
struct pt_regs;
@ -24,3 +42,4 @@ extern unsigned long perf_misc_flags(struct pt_regs *regs);
#define perf_misc_flags(regs) perf_misc_flags(regs)
#endif /* CONFIG_64BIT */
#endif /* _ASM_S390_PERF_EVENT_H */