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/*
* include/linux/tuxonice.h
*
* Copyright (C) 2015 Nigel Cunningham (nigel at tuxonice net)
*
* This file is released under the GPLv2.
*/
#ifndef INCLUDE_LINUX_TUXONICE_H
#define INCLUDE_LINUX_TUXONICE_H
#ifdef CONFIG_TOI_INCREMENTAL
extern void toi_set_logbuf_untracked(void);
extern int toi_make_writable(pgd_t *pgd, unsigned long address);
static inline int toi_incremental_support(void)
{
return 1;
}
/* Copy Before Write */
struct toi_cbw {
unsigned long pfn;
void *virt;
struct toi_cbw *next;
};
struct toi_cbw_state {
bool active; /* Is a fault handler running? */
bool enabled; /* Are we doing copy before write? */
int size; /* The number of pages allocated */
struct toi_cbw *first, *next, *last; /* Pointers to the data structure */
};
#define CBWS_PER_PAGE (PAGE_SIZE / sizeof(struct toi_cbw))
DECLARE_PER_CPU(struct toi_cbw_state, toi_cbw_states);
#else
#define toi_set_logbuf_untracked() do { } while(0)
static inline int toi_make_writable(pgd_t *pgd, unsigned long addr)
{
return 0;
}
static inline int toi_incremental_support(void)
{
return 0;
}
#endif
#endif
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