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9f0cb91767
The ipi tracepoints are mostly generic, but the tracepoints ipi_raise, ipi_entry and ipi_exit are only used by arm and arm64. This means these trace events are wasting memory in all the other architectures that do not use them. Add CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS and have arm and arm64 select it to enable these trace events. The config makes it easy if other architectures decide to trace these as well. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Will Deacon <will@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Nicolas Pitre <nico@fluxnic.net> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/20250722103714.64eba013@gandalf.local.home Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM ipi
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#if !defined(_TRACE_IPI_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_IPI_H
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#include <linux/tracepoint.h>
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TRACE_EVENT(ipi_send_cpu,
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TP_PROTO(const unsigned int cpu, unsigned long callsite, void *callback),
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TP_ARGS(cpu, callsite, callback),
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TP_STRUCT__entry(
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__field(unsigned int, cpu)
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__field(void *, callsite)
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__field(void *, callback)
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),
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TP_fast_assign(
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__entry->cpu = cpu;
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__entry->callsite = (void *)callsite;
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__entry->callback = callback;
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),
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TP_printk("cpu=%u callsite=%pS callback=%pS",
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__entry->cpu, __entry->callsite, __entry->callback)
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);
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TRACE_EVENT(ipi_send_cpumask,
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TP_PROTO(const struct cpumask *cpumask, unsigned long callsite, void *callback),
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TP_ARGS(cpumask, callsite, callback),
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TP_STRUCT__entry(
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__cpumask(cpumask)
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__field(void *, callsite)
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__field(void *, callback)
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),
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TP_fast_assign(
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__assign_cpumask(cpumask, cpumask_bits(cpumask));
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__entry->callsite = (void *)callsite;
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__entry->callback = callback;
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),
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TP_printk("cpumask=%s callsite=%pS callback=%pS",
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__get_cpumask(cpumask), __entry->callsite, __entry->callback)
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);
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#ifdef CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS
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/**
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* ipi_raise - called when a smp cross call is made
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*
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* @mask: mask of recipient CPUs for the IPI
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* @reason: string identifying the IPI purpose
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*
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* It is necessary for @reason to be a static string declared with
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* __tracepoint_string.
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*/
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TRACE_EVENT(ipi_raise,
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TP_PROTO(const struct cpumask *mask, const char *reason),
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TP_ARGS(mask, reason),
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TP_STRUCT__entry(
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__bitmask(target_cpus, nr_cpumask_bits)
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__field(const char *, reason)
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),
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TP_fast_assign(
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__assign_bitmask(target_cpus, cpumask_bits(mask), nr_cpumask_bits);
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__entry->reason = reason;
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),
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TP_printk("target_mask=%s (%s)", __get_bitmask(target_cpus), __entry->reason)
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);
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DECLARE_EVENT_CLASS(ipi_handler,
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TP_PROTO(const char *reason),
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TP_ARGS(reason),
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TP_STRUCT__entry(
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__field(const char *, reason)
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),
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TP_fast_assign(
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__entry->reason = reason;
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),
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TP_printk("(%s)", __entry->reason)
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);
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/**
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* ipi_entry - called immediately before the IPI handler
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*
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* @reason: string identifying the IPI purpose
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*
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* It is necessary for @reason to be a static string declared with
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* __tracepoint_string, ideally the same as used with trace_ipi_raise
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* for that IPI.
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*/
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DEFINE_EVENT(ipi_handler, ipi_entry,
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TP_PROTO(const char *reason),
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TP_ARGS(reason)
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);
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/**
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* ipi_exit - called immediately after the IPI handler returns
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*
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* @reason: string identifying the IPI purpose
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*
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* It is necessary for @reason to be a static string declared with
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* __tracepoint_string, ideally the same as used with trace_ipi_raise for
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* that IPI.
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*/
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DEFINE_EVENT(ipi_handler, ipi_exit,
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TP_PROTO(const char *reason),
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TP_ARGS(reason)
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);
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#endif /* CONFIG_HAVE_EXTRA_IPI_TRACEPOINTS */
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#endif /* _TRACE_IPI_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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