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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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bae663bc63
Current IBS code is not hotplug capable. An offline cpu might not be initialized or deinitialized properly. This patch fixes this by removing on_each_cpu() functions. The IBS init/deinit code is executed in the per-cpu functions model->setup_ctrs() and model->cpu_down() which are also called by hotplug notifiers. model->cpu_down() replaces model->exit() that became obsolete. Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by: Robert Richter <robert.richter@amd.com>
92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
/**
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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 <robert.richter@amd.com>
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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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