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x86 mmiotrace: implement mmiotrace_printk()

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Offer mmiotrace users a function to inject markers from inside the kernel.
This depends on the trace_vprintk() patch.

Signed-off-by: Pekka Paalanen <pq@iki.fi>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pekka Paalanen
2008-09-16 22:00:34 +03:00
committed by Ingo Molnar
parent 801fe40001
commit 9e57fb35d7
4 changed files with 42 additions and 3 deletions
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17
include/linux/mmiotrace.h
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@ -34,11 +34,15 @@ 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
/* Called from ioremap.c */
extern void mmiotrace_ioremap(resource_size_t offset, unsigned long size,
void __iomem *addr);
extern void mmiotrace_iounmap(volatile void __iomem *addr);
/* For anyone to insert markers. Remember trailing newline. */
extern int mmiotrace_printk(const char *fmt, ...)
__attribute__ ((format (printf, 1, 2)));
#else
static inline void mmiotrace_ioremap(resource_size_t offset,
unsigned long size, void __iomem *addr)
@ -48,7 +52,15 @@ static inline void mmiotrace_ioremap(resource_size_t offset,
static inline void mmiotrace_iounmap(volatile void __iomem *addr)
{
}
#endif /* CONFIG_MMIOTRACE_HOOKS */
static inline int mmiotrace_printk(const char *fmt, ...)
__attribute__ ((format (printf, 1, 0)));
static inline int mmiotrace_printk(const char *fmt, ...)
{
return 0;
}
#endif /* CONFIG_MMIOTRACE */
enum mm_io_opcode {
MMIO_READ = 0x1, /* struct mmiotrace_rw */
@ -81,5 +93,6 @@ extern void enable_mmiotrace(void);
extern void disable_mmiotrace(void);
extern void mmio_trace_rw(struct mmiotrace_rw *rw);
extern void mmio_trace_mapping(struct mmiotrace_map *map);
extern int mmio_trace_printk(const char *fmt, va_list args);
#endif /* MMIOTRACE_H */