From 299878bac326c890699c696ebba26f56fe93fc75 Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Mon, 8 May 2017 15:57:59 -0700 Subject: treewide: move set_memory_* functions away from cacheflush.h Patch series "set_memory_* functions header refactor", v3. The set_memory_* APIs came out of a desire to have a better way to change memory attributes. Many of these attributes were linked to cache functionality so the prototypes were put in cacheflush.h. These days, the APIs have grown and have a much wider use than just cache APIs. To support this growth, split off set_memory_* and friends into a separate header file to avoid growing cacheflush.h for APIs that have nothing to do with caches. Link: http://lkml.kernel.org/r/1488920133-27229-2-git-send-email-labbott@redhat.com Signed-off-by: Laura Abbott Acked-by: Russell King Acked-by: Mark Rutland Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86/include/asm/cacheflush.h | 86 +-------------------------------------- 1 file changed, 1 insertion(+), 85 deletions(-) (limited to 'arch/x86/include/asm/cacheflush.h') diff --git a/arch/x86/include/asm/cacheflush.h b/arch/x86/include/asm/cacheflush.h index e7e1942edff73..3d7db6f35aeb8 100644 --- a/arch/x86/include/asm/cacheflush.h +++ b/arch/x86/include/asm/cacheflush.h @@ -4,94 +4,10 @@ /* Caches aren't brain-dead on the intel. */ #include #include - -/* - * The set_memory_* API can be used to change various attributes of a virtual - * address range. The attributes include: - * Cachability : UnCached, WriteCombining, WriteThrough, WriteBack - * Executability : eXeutable, NoteXecutable - * Read/Write : ReadOnly, ReadWrite - * Presence : NotPresent - * - * Within a category, the attributes are mutually exclusive. - * - * The implementation of this API will take care of various aspects that - * are associated with changing such attributes, such as: - * - Flushing TLBs - * - Flushing CPU caches - * - Making sure aliases of the memory behind the mapping don't violate - * coherency rules as defined by the CPU in the system. - * - * What this API does not do: - * - Provide exclusion between various callers - including callers that - * operation on other mappings of the same physical page - * - Restore default attributes when a page is freed - * - Guarantee that mappings other than the requested one are - * in any state, other than that these do not violate rules for - * the CPU you have. Do not depend on any effects on other mappings, - * CPUs other than the one you have may have more relaxed rules. - * The caller is required to take care of these. - */ - -int _set_memory_uc(unsigned long addr, int numpages); -int _set_memory_wc(unsigned long addr, int numpages); -int _set_memory_wt(unsigned long addr, int numpages); -int _set_memory_wb(unsigned long addr, int numpages); -int set_memory_uc(unsigned long addr, int numpages); -int set_memory_wc(unsigned long addr, int numpages); -int set_memory_wt(unsigned long addr, int numpages); -int set_memory_wb(unsigned long addr, int numpages); -int set_memory_x(unsigned long addr, int numpages); -int set_memory_nx(unsigned long addr, int numpages); -int set_memory_ro(unsigned long addr, int numpages); -int set_memory_rw(unsigned long addr, int numpages); -int set_memory_np(unsigned long addr, int numpages); -int set_memory_4k(unsigned long addr, int numpages); - -int set_memory_array_uc(unsigned long *addr, int addrinarray); -int set_memory_array_wc(unsigned long *addr, int addrinarray); -int set_memory_array_wt(unsigned long *addr, int addrinarray); -int set_memory_array_wb(unsigned long *addr, int addrinarray); - -int set_pages_array_uc(struct page **pages, int addrinarray); -int set_pages_array_wc(struct page **pages, int addrinarray); -int set_pages_array_wt(struct page **pages, int addrinarray); -int set_pages_array_wb(struct page **pages, int addrinarray); - -/* - * For legacy compatibility with the old APIs, a few functions - * are provided that work on a "struct page". - * These functions operate ONLY on the 1:1 kernel mapping of the - * memory that the struct page represents, and internally just - * call the set_memory_* function. See the description of the - * set_memory_* function for more details on conventions. - * - * These APIs should be considered *deprecated* and are likely going to - * be removed in the future. - * The reason for this is the implicit operation on the 1:1 mapping only, - * making this not a generally useful API. - * - * Specifically, many users of the old APIs had a virtual address, - * called virt_to_page() or vmalloc_to_page() on that address to - * get a struct page* that the old API required. - * To convert these cases, use set_memory_*() on the original - * virtual address, do not use these functions. - */ - -int set_pages_uc(struct page *page, int numpages); -int set_pages_wb(struct page *page, int numpages); -int set_pages_x(struct page *page, int numpages); -int set_pages_nx(struct page *page, int numpages); -int set_pages_ro(struct page *page, int numpages); -int set_pages_rw(struct page *page, int numpages); - +#include void clflush_cache_range(void *addr, unsigned int size); #define mmio_flush_range(addr, size) clflush_cache_range(addr, size) -extern int kernel_set_to_readonly; -void set_kernel_text_rw(void); -void set_kernel_text_ro(void); - #endif /* _ASM_X86_CACHEFLUSH_H */ -- cgit v1.2.3