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x86: mmiotrace, preview 2

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Kconfig.debug, Makefile and testmmiotrace.c style fixes.
Use real mutex instead of mutex.
Fix failure path in register probe func.
kmmio: RCU read-locked over single stepping.
Generate mapping id's.
Make mmio-mod.c built-in and rewrite its locking.
Add debugfs file to enable/disable mmiotracing.
kmmio: use irqsave spinlocks.
Lots of cleanups in mmio-mod.c
Marker file moved from /proc into debugfs.
Call mmiotrace entrypoints directly from ioremap.c.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
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 0fd0e3da45
commit d61fc44853
7 changed files with 334 additions and 203 deletions
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18
include/linux/mmiotrace.h
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@ -16,11 +16,12 @@ typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
unsigned long condition, struct pt_regs *);
struct kmmio_probe {
struct list_head list;
struct list_head list; /* kmmio internal list */
unsigned long addr; /* start location of the probe point */
unsigned long len; /* length of the probe region */
kmmio_pre_handler_t pre_handler; /* Called before addr is executed. */
kmmio_post_handler_t post_handler; /* Called after addr is executed */
void *user_data;
};
/* kmmio is active by some kmmio_probes? */
@ -38,6 +39,21 @@ extern void unregister_kmmio_probe(struct kmmio_probe *p);
/* Called from page fault handler. */
extern int kmmio_handler(struct pt_regs *regs, unsigned long addr);
/* Called from ioremap.c */
#ifdef CONFIG_MMIOTRACE
extern void
mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr);
extern void mmiotrace_iounmap(volatile void __iomem *addr);
#else
static inline void
mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr)
{
}
static inline void mmiotrace_iounmap(volatile void __iomem *addr)
{
}
#endif /* CONFIG_MMIOTRACE_HOOKS */
#endif /* __KERNEL__ */