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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/x86/oprofile/op_x86_model.h
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/**

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 * @file op_x86_model.h

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 * interface to x86 model-specific MSR operations

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 *

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 * @remark Copyright 2002 OProfile authors

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 * @remark Read the file COPYING

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 *

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 * @author Graydon Hoare

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 * @author Robert Richter <[email protected]>

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 */

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#ifndef OP_X86_MODEL_H

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#define OP_X86_MODEL_H

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#include <asm/types.h>

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#include <asm/perf_event.h>

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struct op_msr {

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	unsigned long	addr;

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	u64		saved;

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};

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struct op_msrs {

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	struct op_msr *counters;

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	struct op_msr *controls;

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	struct op_msr *multiplex;

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};

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struct pt_regs;

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struct oprofile_operations;

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/* The model vtable abstracts the differences between

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 * various x86 CPU models' perfctr support.

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 */

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struct op_x86_model_spec {

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	unsigned int	num_counters;

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	unsigned int	num_controls;

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	unsigned int	num_virt_counters;

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	u64		reserved;

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	u16		event_mask;

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	int		(*init)(struct oprofile_operations *ops);

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	int		(*fill_in_addresses)(struct op_msrs * const msrs);

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	void		(*setup_ctrs)(struct op_x86_model_spec const *model,

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				      struct op_msrs const * const msrs);

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	void		(*cpu_down)(void);

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	int		(*check_ctrs)(struct pt_regs * const regs,

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				      struct op_msrs const * const msrs);

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	void		(*start)(struct op_msrs const * const msrs);

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	void		(*stop)(struct op_msrs const * const msrs);

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	void		(*shutdown)(struct op_msrs const * const msrs);

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#ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX

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	void		(*switch_ctrl)(struct op_x86_model_spec const *model,

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				       struct op_msrs const * const msrs);

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#endif

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};

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struct op_counter_config;

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static inline void op_x86_warn_in_use(int counter)

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{

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	/*

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	 * The warning indicates an already running counter. If

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	 * oprofile doesn't collect data, then try using a different

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	 * performance counter on your platform to monitor the desired

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	 * event. Delete counter #%d from the desired event by editing

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	 * the /usr/share/oprofile/%s/<cpu>/events file. If the event

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	 * cannot be monitored by any other counter, contact your

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	 * hardware or BIOS vendor.

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	 */

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	pr_warning("oprofile: counter #%d on cpu #%d may already be used\n",

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		   counter, smp_processor_id());

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}

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static inline void op_x86_warn_reserved(int counter)

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{

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	pr_warning("oprofile: counter #%d is already reserved\n", counter);

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}

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extern u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,

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			   struct op_counter_config *counter_config);

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extern int op_x86_phys_to_virt(int phys);

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extern int op_x86_virt_to_phys(int virt);

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extern struct op_x86_model_spec op_ppro_spec;

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extern struct op_x86_model_spec op_p4_spec;

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extern struct op_x86_model_spec op_p4_ht2_spec;

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extern struct op_x86_model_spec op_amd_spec;

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extern struct op_x86_model_spec op_arch_perfmon_spec;

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#endif /* OP_X86_MODEL_H */

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