From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- include/linux/tuxonice.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 include/linux/tuxonice.h (limited to 'include/linux/tuxonice.h') diff --git a/include/linux/tuxonice.h b/include/linux/tuxonice.h new file mode 100644 index 000000000..67b05a750 --- /dev/null +++ b/include/linux/tuxonice.h @@ -0,0 +1,48 @@ +/* + * 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 -- cgit v1.2.3-54-g00ecf