Loading...
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __MEMTYPE_H_ #define __MEMTYPE_H_ extern int pat_debug_enable; #define dprintk(fmt, arg...) \ do { if (pat_debug_enable) pr_info("x86/PAT: " fmt, ##arg); } while (0) struct memtype { u64 start; u64 end; u64 subtree_max_end; enum page_cache_mode type; struct rb_node rb; }; static inline char *cattr_name(enum page_cache_mode pcm) { switch (pcm) { case _PAGE_CACHE_MODE_UC: return "uncached"; case _PAGE_CACHE_MODE_UC_MINUS: return "uncached-minus"; case _PAGE_CACHE_MODE_WB: return "write-back"; case _PAGE_CACHE_MODE_WC: return "write-combining"; case _PAGE_CACHE_MODE_WT: return "write-through"; case _PAGE_CACHE_MODE_WP: return "write-protected"; default: return "broken"; } } #ifdef CONFIG_X86_PAT extern int memtype_check_insert(struct memtype *entry_new, enum page_cache_mode *new_type); extern struct memtype *memtype_erase(u64 start, u64 end); extern struct memtype *memtype_lookup(u64 addr); extern int memtype_copy_nth_element(struct memtype *entry_out, loff_t pos); #else static inline int memtype_check_insert(struct memtype *entry_new, enum page_cache_mode *new_type) { return 0; } static inline struct memtype *memtype_erase(u64 start, u64 end) { return NULL; } static inline struct memtype *memtype_lookup(u64 addr) { return NULL; } static inline int memtype_copy_nth_element(struct memtype *out, loff_t pos) { return 0; } #endif #endif /* __MEMTYPE_H_ */ |