cregit-Linux how code gets into the kernel

Release 4.7 include/linux/mmiotrace.h

Directory: include/linux
#ifndef _LINUX_MMIOTRACE_H

#define _LINUX_MMIOTRACE_H

#include <linux/types.h>
#include <linux/list.h>

struct kmmio_probe;
struct pt_regs;


typedef void (*kmmio_pre_handler_t)(struct kmmio_probe *,
				struct pt_regs *, unsigned long addr);

typedef void (*kmmio_post_handler_t)(struct kmmio_probe *,
				unsigned long condition, struct pt_regs *);


struct kmmio_probe {
	/* kmmio internal list: */
	
struct list_head	list;
	/* start location of the probe point: */
	
unsigned long		addr;
	/* length of the probe region: */
	
unsigned long		len;
	/* Called before addr is executed: */
	
kmmio_pre_handler_t	pre_handler;
	/* Called after addr is executed: */
	
kmmio_post_handler_t	post_handler;
	
void			*private;
};

extern unsigned int kmmio_count;

extern int register_kmmio_probe(struct kmmio_probe *p);
extern void unregister_kmmio_probe(struct kmmio_probe *p);
extern int kmmio_init(void);
extern void kmmio_cleanup(void);

#ifdef CONFIG_MMIOTRACE
/* kmmio is active by some kmmio_probes? */

static inline int is_kmmio_active(void) { return kmmio_count; }

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/* Called from page fault handler. */ extern int kmmio_handler(struct pt_regs *regs, unsigned long addr); /* 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 __printf(1, 2) int mmiotrace_printk(const char *fmt, ...); #else /* !CONFIG_MMIOTRACE: */
static inline int is_kmmio_active(void) { return 0; }

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static inline int kmmio_handler(struct pt_regs *regs, unsigned long addr) { return 0; }

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static inline void mmiotrace_ioremap(resource_size_t offset, unsigned long size, void __iomem *addr) { }

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static inline void mmiotrace_iounmap(volatile void __iomem *addr) { }

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static inline __printf(1, 2) int mmiotrace_printk(const char *fmt, ...) { return 0; } #endif /* CONFIG_MMIOTRACE */ enum mm_io_opcode { MMIO_READ = 0x1, /* struct mmiotrace_rw */ MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ MMIO_PROBE = 0x3, /* struct mmiotrace_map */ MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ MMIO_UNKNOWN_OP = 0x5, /* struct mmiotrace_rw */ }; struct mmiotrace_rw { resource_size_t phys; /* PCI address of register */ unsigned long value; unsigned long pc; /* optional program counter */ int map_id; unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ unsigned char width; /* size of register access in bytes */ }; struct mmiotrace_map { resource_size_t phys; /* base address in PCI space */ unsigned long virt; /* base virtual address */ unsigned long len; /* mapping size */ int map_id; unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ }; /* in kernel/trace/trace_mmiotrace.c */ 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 __printf(1, 0) int mmio_trace_printk(const char *fmt, va_list args); #endif /* _LINUX_MMIOTRACE_H */

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joe perchesjoe perches163.69%17.69%
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nicolas ioossnicolas iooss40.92%17.69%
Total434100.00%13100.00%
Directory: include/linux
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