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ftrace: add mmiotrace plugin

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On Sat, 22 Mar 2008 13:07:47 +0100
Ingo Molnar <mingo@elte.hu> wrote:

> > > i'd suggest the following: pull x86.git and sched-devel.git into a
> > > single tree [the two will combine without rejects]. Then try to add a
> > > kernel/tracing/trace_mmiotrace.c ftrace plugin. The trace_sysprof.c
> > > plugin might be a good example.
> >
> > I did this and now I have mmiotrace enabled/disabled via the tracing
> > framework (what do we call this, since ftrace is one of the tracers?).
>
> cool! could you send the patches for that? (even if they are not fully
> functional yet)

Patch attached in the end. Nice to see how much code disappeared. I tried
to mark all the features I had to break with XXX-comments.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Pekka Paalanen
2008-05-12 21:20:57 +02:00
committed by Thomas Gleixner
parent d61fc44853
commit f984b51e07
5 changed files with 123 additions and 179 deletions
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6
include/linux/mmiotrace.h
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@@ -54,6 +54,12 @@ static inline void mmiotrace_iounmap(volatile void __iomem *addr)
}
#endif /* CONFIG_MMIOTRACE_HOOKS */
/* in kernel/trace/trace_mmiotrace.c */
extern int __init init_mmiotrace(void);
extern void enable_mmiotrace(void);
extern void disable_mmiotrace(void);
extern void mmio_trace_record(u32 type, unsigned long addr, unsigned long arg);
#endif /* __KERNEL__ */