arch/x86/oprofile/op_x86_model.h

   1 /**
   2  * @file op_x86_model.h
   3  * interface to x86 model-specific MSR operations
   4  *
   5  * @remark Copyright 2002 OProfile authors
   6  * @remark Read the file COPYING
   7  *
   8  * @author Graydon Hoare
   9  * @author Robert Richter <robert.richter@amd.com>
  10  */
  11
  12 #ifndef OP_X86_MODEL_H
  13 #define OP_X86_MODEL_H
  14
  15 #include <asm/types.h>
  16 #include <asm/perf_event.h>
  17
  18 struct op_msr {
  19         unsigned long   addr;
  20         u64             saved;
  21 };
  22
  23 struct op_msrs {
  24         struct op_msr *counters;
  25         struct op_msr *controls;
  26         struct op_msr *multiplex;
  27 };
  28
  29 struct pt_regs;
  30
  31 struct oprofile_operations;
  32
  33 /* The model vtable abstracts the differences between
  34  * various x86 CPU models' perfctr support.
  35  */
  36 struct op_x86_model_spec {
  37         unsigned int    num_counters;
  38         unsigned int    num_controls;
  39         unsigned int    num_virt_counters;
  40         u64             reserved;
  41         u16             event_mask;
  42         int             (*init)(struct oprofile_operations *ops);
  43         int             (*fill_in_addresses)(struct op_msrs * const msrs);
  44         void            (*setup_ctrs)(struct op_x86_model_spec const *model,
  45                                       struct op_msrs const * const msrs);
  46         int             (*check_ctrs)(struct pt_regs * const regs,
  47                                       struct op_msrs const * const msrs);
  48         void            (*start)(struct op_msrs const * const msrs);
  49         void            (*stop)(struct op_msrs const * const msrs);
  50         void            (*shutdown)(struct op_msrs const * const msrs);
  51 #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
  52         void            (*switch_ctrl)(struct op_x86_model_spec const *model,
  53                                        struct op_msrs const * const msrs);
  54 #endif
  55 };
  56
  57 struct op_counter_config;
  58
  59 static inline void op_x86_warn_in_use(int counter)
  60 {
  61         /*
  62          * The warning indicates an already running counter. If
  63          * oprofile doesn't collect data, then try using a different
  64          * performance counter on your platform to monitor the desired
  65          * event. Delete counter #%d from the desired event by editing
  66          * the /usr/share/oprofile/%s/<cpu>/events file. If the event
  67          * cannot be monitored by any other counter, contact your
  68          * hardware or BIOS vendor.
  69          */
  70         pr_warning("oprofile: counter #%d on cpu #%d may already be used\n",
  71                    counter, smp_processor_id());
  72 }
  73
  74 static inline void op_x86_warn_reserved(int counter)
  75 {
  76         pr_warning("oprofile: counter #%d is already reserved\n", counter);
  77 }
  78
  79 extern u64 op_x86_get_ctrl(struct op_x86_model_spec const *model,
  80                            struct op_counter_config *counter_config);
  81 extern int op_x86_phys_to_virt(int phys);
  82 extern int op_x86_virt_to_phys(int virt);
  83
  84 extern struct op_x86_model_spec op_ppro_spec;
  85 extern struct op_x86_model_spec op_p4_spec;
  86 extern struct op_x86_model_spec op_p4_ht2_spec;
  87 extern struct op_x86_model_spec op_amd_spec;
  88 extern struct op_x86_model_spec op_arch_perfmon_spec;
  89
  90 #endif /* OP_X86_MODEL_H */