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/*
* Performance event support - s390 specific definitions.
*
* 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
#include <linux/perf_event.h>
#include <linux/device.h>
#include <asm/cpu_mf.h>
/* Per-CPU flags for PMU states */
#define PMU_F_RESERVED 0x1000
#define PMU_F_ENABLED 0x2000
#define PMU_F_IN_USE 0x4000
#define PMU_F_ERR_IBE 0x0100
#define PMU_F_ERR_LSDA 0x0200
#define PMU_F_ERR_MASK (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
/* 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;
extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
extern unsigned long perf_misc_flags(struct pt_regs *regs);
#define perf_misc_flags(regs) perf_misc_flags(regs)
/* Perf pt_regs extension for sample-data-entry indicators */
struct perf_sf_sde_regs {
unsigned char in_guest:1; /* guest sample */
unsigned long reserved:63; /* reserved */
};
/* Perf PMU definitions for the counter facility */
#define PERF_CPUM_CF_MAX_CTR 256
/* Perf PMU definitions for the sampling facility */
#define PERF_CPUM_SF_MAX_CTR 2
#define PERF_EVENT_CPUM_SF 0xB0000UL /* Event: Basic-sampling */
#define PERF_EVENT_CPUM_SF_DIAG 0xBD000UL /* Event: Combined-sampling */
#define PERF_CPUM_SF_BASIC_MODE 0x0001 /* Basic-sampling flag */
#define PERF_CPUM_SF_DIAG_MODE 0x0002 /* Diagnostic-sampling flag */
#define PERF_CPUM_SF_MODE_MASK (PERF_CPUM_SF_BASIC_MODE| \
PERF_CPUM_SF_DIAG_MODE)
#define PERF_CPUM_SF_FULL_BLOCKS 0x0004 /* Process full SDBs only */
#define REG_NONE 0
#define REG_OVERFLOW 1
#define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
#define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
#define RAWSAMPLE_REG(hwc) ((hwc)->config)
#define TEAR_REG(hwc) ((hwc)->last_tag)
#define SAMPL_RATE(hwc) ((hwc)->event_base)
#define SAMPL_FLAGS(hwc) ((hwc)->config_base)
#define SAMPL_DIAG_MODE(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
#define SDB_FULL_BLOCKS(hwc) (SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
/* Structure for sampling data entries to be passed as perf raw sample data
* to user space. Note that raw sample data must be aligned and, thus, might
* be padded with zeros.
*/
struct sf_raw_sample {
#define SF_RAW_SAMPLE_BASIC PERF_CPUM_SF_BASIC_MODE
#define SF_RAW_SAMPLE_DIAG PERF_CPUM_SF_DIAG_MODE
u64 format;
u32 size; /* Size of sf_raw_sample */
u16 bsdes; /* Basic-sampling data entry size */
u16 dsdes; /* Diagnostic-sampling data entry size */
struct hws_basic_entry basic; /* Basic-sampling data entry */
struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
u8 padding[]; /* Padding to next multiple of 8 */
} __packed;
/* Perf hardware reserve and release functions */
#ifdef CONFIG_PERF_EVENTS
int perf_reserve_sampling(void);
void perf_release_sampling(void);
#else /* CONFIG_PERF_EVENTS */
static inline int perf_reserve_sampling(void)
{
return 0;
}
static inline void perf_release_sampling(void) {}
#endif /* CONFIG_PERF_EVENTS */
#endif /* _ASM_S390_PERF_EVENT_H */
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