arch/powerpc/include/asm/perf_event_server.h - kernel/quantenna - Git at Google

 /*
  * Performance event support - PowerPC classic/server specific definitions.
  *
  * Copyright 2008-2009 Paul Mackerras, IBM Corporation.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */

 #include <linux/types.h>
 #include <asm/hw_irq.h>
 #include <linux/device.h>
 #include <uapi/asm/perf_event.h>

 /* Update perf_event_print_debug() if this changes */
 #define MAX_HWEVENTS		8
 #define MAX_EVENT_ALTERNATIVES	8
 #define MAX_LIMITED_HWCOUNTERS	2

 struct perf_event;

 /*
  * This struct provides the constants and functions needed to
  * describe the PMU on a particular POWER-family CPU.
  */
 struct power_pmu {
 	const char	*name;
 	int		n_counter;
 	int		max_alternatives;
 	unsigned long	add_fields;
 	unsigned long	test_adder;
 	int		(*compute_mmcr)(u64 events[], int n_ev,
 				unsigned int hwc[], unsigned long mmcr[],
 				struct perf_event *pevents[]);
 	int		(*get_constraint)(u64 event_id, unsigned long *mskp,
 				unsigned long *valp);
 	int		(*get_alternatives)(u64 event_id, unsigned int flags,
 				u64 alt[]);
 	u64             (*bhrb_filter_map)(u64 branch_sample_type);
 	void            (*config_bhrb)(u64 pmu_bhrb_filter);
 	void		(*disable_pmc)(unsigned int pmc, unsigned long mmcr[]);
 	int		(*limited_pmc_event)(u64 event_id);
 	u32		flags;
 	const struct attribute_group	**attr_groups;
 	int		n_generic;
 	int		*generic_events;
 	int		(*cache_events)[PERF_COUNT_HW_CACHE_MAX]
 			       [PERF_COUNT_HW_CACHE_OP_MAX]
 			       [PERF_COUNT_HW_CACHE_RESULT_MAX];

 	/* BHRB entries in the PMU */
 	int		bhrb_nr;
 };

 /*
  * Values for power_pmu.flags
  */
 #define PPMU_LIMITED_PMC5_6	0x00000001 /* PMC5/6 have limited function */
 #define PPMU_ALT_SIPR		0x00000002 /* uses alternate posn for SIPR/HV */
 #define PPMU_NO_SIPR		0x00000004 /* no SIPR/HV in MMCRA at all */
 #define PPMU_NO_CONT_SAMPLING	0x00000008 /* no continuous sampling */
 #define PPMU_SIAR_VALID		0x00000010 /* Processor has SIAR Valid bit */
 #define PPMU_HAS_SSLOT		0x00000020 /* Has sampled slot in MMCRA */
 #define PPMU_HAS_SIER		0x00000040 /* Has SIER */
 #define PPMU_ARCH_207S		0x00000080 /* PMC is architecture v2.07S */

 /*
  * Values for flags to get_alternatives()
  */
 #define PPMU_LIMITED_PMC_OK	1	/* can put this on a limited PMC */
 #define PPMU_LIMITED_PMC_REQD	2	/* have to put this on a limited PMC */
 #define PPMU_ONLY_COUNT_RUN	4	/* only counting in run state */

 extern int register_power_pmu(struct power_pmu *);

 struct pt_regs;
 extern unsigned long perf_misc_flags(struct pt_regs *regs);
 extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
 extern unsigned long int read_bhrb(int n);

 /*
  * Only override the default definitions in include/linux/perf_event.h
  * if we have hardware PMU support.
  */
 #ifdef CONFIG_PPC_PERF_CTRS
 #define perf_misc_flags(regs)	perf_misc_flags(regs)
 #endif

 /*
  * The power_pmu.get_constraint function returns a 32/64-bit value and
  * a 32/64-bit mask that express the constraints between this event_id and
  * other events.
  *
  * The value and mask are divided up into (non-overlapping) bitfields
  * of three different types:
  *
  * Select field: this expresses the constraint that some set of bits
  * in MMCR* needs to be set to a specific value for this event_id.  For a
  * select field, the mask contains 1s in every bit of the field, and
  * the value contains a unique value for each possible setting of the
  * MMCR* bits.  The constraint checking code will ensure that two events
  * that set the same field in their masks have the same value in their
  * value dwords.
  *
  * Add field: this expresses the constraint that there can be at most
  * N events in a particular class.  A field of k bits can be used for
  * N <= 2^(k-1) - 1.  The mask has the most significant bit of the field
  * set (and the other bits 0), and the value has only the least significant
  * bit of the field set.  In addition, the 'add_fields' and 'test_adder'
  * in the struct power_pmu for this processor come into play.  The
  * add_fields value contains 1 in the LSB of the field, and the
  * test_adder contains 2^(k-1) - 1 - N in the field.
  *
  * NAND field: this expresses the constraint that you may not have events
  * in all of a set of classes.  (For example, on PPC970, you can't select
  * events from the FPU, ISU and IDU simultaneously, although any two are
  * possible.)  For N classes, the field is N+1 bits wide, and each class
  * is assigned one bit from the least-significant N bits.  The mask has
  * only the most-significant bit set, and the value has only the bit
  * for the event_id's class set.  The test_adder has the least significant
  * bit set in the field.
  *
  * If an event_id is not subject to the constraint expressed by a particular
  * field, then it will have 0 in both the mask and value for that field.
  */

 extern ssize_t power_events_sysfs_show(struct device *dev,
 				struct device_attribute *attr, char *page);

 /*
  * EVENT_VAR() is same as PMU_EVENT_VAR with a suffix.
  *
  * Having a suffix allows us to have aliases in sysfs - eg: the generic
  * event 'cpu-cycles' can have two entries in sysfs: 'cpu-cycles' and
  * 'PM_CYC' where the latter is the name by which the event is known in
  * POWER CPU specification.
  *
  * Similarly, some hardware and cache events use the same event code. Eg.
  * on POWER8, both "cache-references" and "L1-dcache-loads" events refer
  * to the same event, PM_LD_REF_L1.  The suffix, allows us to have two
  * sysfs objects for the same event and thus two entries/aliases in sysfs.
  */
 #define	EVENT_VAR(_id, _suffix)		event_attr_##_id##_suffix
 #define	EVENT_PTR(_id, _suffix)		&EVENT_VAR(_id, _suffix).attr.attr

 #define	EVENT_ATTR(_name, _id, _suffix)					\
 	PMU_EVENT_ATTR(_name, EVENT_VAR(_id, _suffix), _id,		\
 			power_events_sysfs_show)

 #define	GENERIC_EVENT_ATTR(_name, _id)	EVENT_ATTR(_name, _id, _g)
 #define	GENERIC_EVENT_PTR(_id)		EVENT_PTR(_id, _g)

 #define	CACHE_EVENT_ATTR(_name, _id)	EVENT_ATTR(_name, _id, _c)
 #define	CACHE_EVENT_PTR(_id)		EVENT_PTR(_id, _c)

 #define	POWER_EVENT_ATTR(_name, _id)	EVENT_ATTR(_name, _id, _p)
 #define	POWER_EVENT_PTR(_id)		EVENT_PTR(_id, _p)
	/*
	* Performance event support - PowerPC classic/server specific definitions.
	*
	* Copyright 2008-2009 Paul Mackerras, IBM Corporation.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/

	#include <linux/types.h>
	#include <asm/hw_irq.h>
	#include <linux/device.h>
	#include <uapi/asm/perf_event.h>

	/* Update perf_event_print_debug() if this changes */
	#define MAX_HWEVENTS 8
	#define MAX_EVENT_ALTERNATIVES 8
	#define MAX_LIMITED_HWCOUNTERS 2

	struct perf_event;

	/*
	* This struct provides the constants and functions needed to
	* describe the PMU on a particular POWER-family CPU.
	*/
	struct power_pmu {
	const char *name;
	int n_counter;
	int max_alternatives;
	unsigned long add_fields;
	unsigned long test_adder;
	int (*compute_mmcr)(u64 events[], int n_ev,
	unsigned int hwc[], unsigned long mmcr[],
	struct perf_event *pevents[]);
	int (get_constraint)(u64 event_id, unsigned long mskp,
	unsigned long *valp);
	int (*get_alternatives)(u64 event_id, unsigned int flags,
	u64 alt[]);
	u64 (*bhrb_filter_map)(u64 branch_sample_type);
	void (*config_bhrb)(u64 pmu_bhrb_filter);
	void (*disable_pmc)(unsigned int pmc, unsigned long mmcr[]);
	int (*limited_pmc_event)(u64 event_id);
	u32 flags;
	const struct attribute_group **attr_groups;
	int n_generic;
	int *generic_events;
	int (*cache_events)[PERF_COUNT_HW_CACHE_MAX]
	[PERF_COUNT_HW_CACHE_OP_MAX]
	[PERF_COUNT_HW_CACHE_RESULT_MAX];

	/* BHRB entries in the PMU */
	int bhrb_nr;
	};

	/*
	* Values for power_pmu.flags
	*/
	#define PPMU_LIMITED_PMC5_6 0x00000001 /* PMC5/6 have limited function */
	#define PPMU_ALT_SIPR 0x00000002 /* uses alternate posn for SIPR/HV */
	#define PPMU_NO_SIPR 0x00000004 /* no SIPR/HV in MMCRA at all */
	#define PPMU_NO_CONT_SAMPLING 0x00000008 /* no continuous sampling */
	#define PPMU_SIAR_VALID 0x00000010 /* Processor has SIAR Valid bit */
	#define PPMU_HAS_SSLOT 0x00000020 /* Has sampled slot in MMCRA */
	#define PPMU_HAS_SIER 0x00000040 /* Has SIER */
	#define PPMU_ARCH_207S 0x00000080 /* PMC is architecture v2.07S */

	/*
	* Values for flags to get_alternatives()
	*/
	#define PPMU_LIMITED_PMC_OK 1 /* can put this on a limited PMC */
	#define PPMU_LIMITED_PMC_REQD 2 /* have to put this on a limited PMC */
	#define PPMU_ONLY_COUNT_RUN 4 /* only counting in run state */

	extern int register_power_pmu(struct power_pmu *);

	struct pt_regs;
	extern unsigned long perf_misc_flags(struct pt_regs *regs);
	extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
	extern unsigned long int read_bhrb(int n);

	/*
	* Only override the default definitions in include/linux/perf_event.h
	* if we have hardware PMU support.
	*/
	#ifdef CONFIG_PPC_PERF_CTRS
	#define perf_misc_flags(regs) perf_misc_flags(regs)
	#endif

	/*
	* The power_pmu.get_constraint function returns a 32/64-bit value and
	* a 32/64-bit mask that express the constraints between this event_id and
	* other events.
	*
	* The value and mask are divided up into (non-overlapping) bitfields
	* of three different types:
	*
	* Select field: this expresses the constraint that some set of bits
	* in MMCR* needs to be set to a specific value for this event_id. For a
	* select field, the mask contains 1s in every bit of the field, and
	* the value contains a unique value for each possible setting of the
	* MMCR* bits. The constraint checking code will ensure that two events
	* that set the same field in their masks have the same value in their
	* value dwords.
	*
	* Add field: this expresses the constraint that there can be at most
	* N events in a particular class. A field of k bits can be used for
	* N <= 2^(k-1) - 1. The mask has the most significant bit of the field
	* set (and the other bits 0), and the value has only the least significant
	* bit of the field set. In addition, the 'add_fields' and 'test_adder'
	* in the struct power_pmu for this processor come into play. The
	* add_fields value contains 1 in the LSB of the field, and the
	* test_adder contains 2^(k-1) - 1 - N in the field.
	*
	* NAND field: this expresses the constraint that you may not have events
	* in all of a set of classes. (For example, on PPC970, you can't select
	* events from the FPU, ISU and IDU simultaneously, although any two are
	* possible.) For N classes, the field is N+1 bits wide, and each class
	* is assigned one bit from the least-significant N bits. The mask has
	* only the most-significant bit set, and the value has only the bit
	* for the event_id's class set. The test_adder has the least significant
	* bit set in the field.
	*
	* If an event_id is not subject to the constraint expressed by a particular
	* field, then it will have 0 in both the mask and value for that field.
	*/

	extern ssize_t power_events_sysfs_show(struct device *dev,
	struct device_attribute attr, char page);

	/*
	* EVENT_VAR() is same as PMU_EVENT_VAR with a suffix.
	*
	* Having a suffix allows us to have aliases in sysfs - eg: the generic
	* event 'cpu-cycles' can have two entries in sysfs: 'cpu-cycles' and
	* 'PM_CYC' where the latter is the name by which the event is known in
	* POWER CPU specification.
	*
	* Similarly, some hardware and cache events use the same event code. Eg.
	* on POWER8, both "cache-references" and "L1-dcache-loads" events refer
	* to the same event, PM_LD_REF_L1. The suffix, allows us to have two
	* sysfs objects for the same event and thus two entries/aliases in sysfs.
	*/
	#define EVENT_VAR(_id, _suffix) event_attr_##_id##_suffix
	#define EVENT_PTR(_id, _suffix) &EVENT_VAR(_id, _suffix).attr.attr

	#define EVENT_ATTR(_name, _id, _suffix) \
	PMU_EVENT_ATTR(_name, EVENT_VAR(_id, _suffix), _id, \
	power_events_sysfs_show)

	#define GENERIC_EVENT_ATTR(_name, _id) EVENT_ATTR(_name, _id, _g)
	#define GENERIC_EVENT_PTR(_id) EVENT_PTR(_id, _g)

	#define CACHE_EVENT_ATTR(_name, _id) EVENT_ATTR(_name, _id, _c)
	#define CACHE_EVENT_PTR(_id) EVENT_PTR(_id, _c)

	#define POWER_EVENT_ATTR(_name, _id) EVENT_ATTR(_name, _id, _p)
	#define POWER_EVENT_PTR(_id) EVENT_PTR(_id, _p)