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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/tools/tracing/rtla/src/timerlat_bpf.h
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/* SPDX-License-Identifier: GPL-2.0 */

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#pragma once

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enum summary_field {

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	SUMMARY_CURRENT,

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	SUMMARY_MIN,

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	SUMMARY_MAX,

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	SUMMARY_COUNT,

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	SUMMARY_SUM,

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	SUMMARY_OVERFLOW,

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	SUMMARY_FIELD_N

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};

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#ifndef __bpf__

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#ifdef HAVE_BPF_SKEL

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int timerlat_bpf_init(struct timerlat_params *params);

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int timerlat_bpf_attach(void);

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void timerlat_bpf_detach(void);

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void timerlat_bpf_destroy(void);

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int timerlat_bpf_wait(int timeout);

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int timerlat_bpf_restart_tracing(void);

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int timerlat_bpf_get_hist_value(int key,

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				long long *value_irq,

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				long long *value_thread,

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				long long *value_user,

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				int cpus);

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int timerlat_bpf_get_summary_value(enum summary_field key,

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				   long long *value_irq,

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				   long long *value_thread,

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				   long long *value_user,

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				   int cpus);

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static inline int have_libbpf_support(void) { return 1; }

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#else

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static inline int timerlat_bpf_init(struct timerlat_params *params)

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{

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	return -1;

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}

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static inline int timerlat_bpf_attach(void) { return -1; }

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static inline void timerlat_bpf_detach(void) { };

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static inline void timerlat_bpf_destroy(void) { };

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static inline int timerlat_bpf_wait(int timeout) { return -1; }

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static inline int timerlat_bpf_restart_tracing(void) { return -1; };

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static inline int timerlat_bpf_get_hist_value(int key,

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					      long long *value_irq,

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					      long long *value_thread,

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					      long long *value_user,

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					      int cpus)

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{

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	return -1;

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}

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static inline int timerlat_bpf_get_summary_value(enum summary_field key,

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						 long long *value_irq,

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						 long long *value_thread,

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						 long long *value_user,

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						 int cpus)

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{

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	return -1;

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}

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static inline int have_libbpf_support(void) { return 0; }

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#endif /* HAVE_BPF_SKEL */

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#endif /* __bpf__ */

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