443e802bab
The host-program-parameter (hpp) value of basic sample-data-entries designates a SIE control block that is set by the LPP instruction in sie64a(). Non-zero values indicate guest samples, a value of zero indicates a host sample. For perf samples, host and guest samples are distinguished using particular PERF_MISC_* flags. The perf layer calls perf_misc_flags() to set the flags based on the pt_regs content. For each sample-data-entry, the cpum_sf PMU creates a pt_regs structure with the sample-data information. An additional flag structure is added to easily distinguish between host and guest samples. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/*
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* Performance event support - s390 specific definitions.
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*
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* Copyright IBM Corp. 2009, 2013
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* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
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* Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
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*/
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#ifndef _ASM_S390_PERF_EVENT_H
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#define _ASM_S390_PERF_EVENT_H
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#ifdef CONFIG_64BIT
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#include <linux/perf_event.h>
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#include <linux/device.h>
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#include <asm/cpu_mf.h>
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/* Per-CPU flags for PMU states */
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#define PMU_F_RESERVED 0x1000
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#define PMU_F_ENABLED 0x2000
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#define PMU_F_IN_USE 0x4000
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#define PMU_F_ERR_IBE 0x0100
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#define PMU_F_ERR_LSDA 0x0200
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#define PMU_F_ERR_MASK (PMU_F_ERR_IBE|PMU_F_ERR_LSDA)
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/* Perf defintions for PMU event attributes in sysfs */
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extern __init const struct attribute_group **cpumf_cf_event_group(void);
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extern ssize_t cpumf_events_sysfs_show(struct device *dev,
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struct device_attribute *attr,
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char *page);
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#define EVENT_VAR(_cat, _name) event_attr_##_cat##_##_name
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#define EVENT_PTR(_cat, _name) (&EVENT_VAR(_cat, _name).attr.attr)
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#define CPUMF_EVENT_ATTR(cat, name, id) \
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PMU_EVENT_ATTR(name, EVENT_VAR(cat, name), id, cpumf_events_sysfs_show)
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#define CPUMF_EVENT_PTR(cat, name) EVENT_PTR(cat, name)
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/* Perf callbacks */
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struct pt_regs;
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extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
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extern unsigned long perf_misc_flags(struct pt_regs *regs);
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#define perf_misc_flags(regs) perf_misc_flags(regs)
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/* Perf pt_regs extension for sample-data-entry indicators */
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struct perf_sf_sde_regs {
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unsigned char in_guest:1; /* guest sample */
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unsigned long reserved:63; /* reserved */
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};
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/* Perf PMU definitions for the counter facility */
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#define PERF_CPUM_CF_MAX_CTR 256
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/* Perf PMU definitions for the sampling facility */
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#define PERF_CPUM_SF_MAX_CTR 1
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#define PERF_EVENT_CPUM_SF 0xB0000UL /* Raw event ID */
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#define REG_NONE 0
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#define REG_OVERFLOW 1
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#define OVERFLOW_REG(hwc) ((hwc)->extra_reg.config)
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#define SFB_ALLOC_REG(hwc) ((hwc)->extra_reg.alloc)
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#define TEAR_REG(hwc) ((hwc)->last_tag)
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#define SAMPL_RATE(hwc) ((hwc)->event_base)
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/* Perf hardware reserve and release functions */
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int perf_reserve_sampling(void);
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void perf_release_sampling(void);
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#endif /* CONFIG_64BIT */
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#endif /* _ASM_S390_PERF_EVENT_H */
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