Commit 08b0b005 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add flush_dcache_folio() 



This is a default implementation which calls flush_dcache_page() on
each page in the folio.  If architectures can do better, they should
implement their own version of it.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent 64601000

Documentation/core-api/cachetlb.rst

+6 −0
Original line number Original line Diff line number Diff line
@@ -326,6 +326,12 @@ maps this page at its virtual address. 
			dirty.  Again, see sparc64 for examples of how

			dirty.  Again, see sparc64 for examples of how

			to deal with this.

			to deal with this.





  ``void flush_dcache_folio(struct folio *folio)``

	This function is called under the same circumstances as

	flush_dcache_page().  It allows the architecture to

	optimise for flushing the entire folio of pages instead

	of flushing one page at a time.



  ``void copy_to_user_page(struct vm_area_struct *vma, struct page *page,

  ``void copy_to_user_page(struct vm_area_struct *vma, struct page *page,

  unsigned long user_vaddr, void *dst, void *src, int len)``

  unsigned long user_vaddr, void *dst, void *src, int len)``

  ``void copy_from_user_page(struct vm_area_struct *vma, struct page *page,

  ``void copy_from_user_page(struct vm_area_struct *vma, struct page *page,

arch/arc/include/asm/cacheflush.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -36,6 +36,7 @@ void __flush_dcache_page(phys_addr_t paddr, unsigned long vaddr); 
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1





void flush_dcache_page(struct page *page);

void flush_dcache_page(struct page *page);

void flush_dcache_folio(struct folio *folio);





void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);

void dma_cache_wback_inv(phys_addr_t start, unsigned long sz);

void dma_cache_inv(phys_addr_t start, unsigned long sz);

void dma_cache_inv(phys_addr_t start, unsigned long sz);

arch/arm/include/asm/cacheflush.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -290,6 +290,7 @@ extern void flush_cache_page(struct vm_area_struct *vma, unsigned long user_addr 
 */

 */

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

extern void flush_dcache_page(struct page *);

extern void flush_dcache_page(struct page *);

void flush_dcache_folio(struct folio *folio);





#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1

#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1

static inline void flush_kernel_vmap_range(void *addr, int size)

static inline void flush_kernel_vmap_range(void *addr, int size)

arch/m68k/include/asm/cacheflush_mm.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -250,6 +250,7 @@ static inline void __flush_page_to_ram(void *vaddr) 




#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1

#define flush_dcache_page(page)		__flush_page_to_ram(page_address(page))

#define flush_dcache_page(page)		__flush_page_to_ram(page_address(page))

void flush_dcache_folio(struct folio *folio);

#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_icache_page(vma, page)	__flush_page_to_ram(page_address(page))

#define flush_icache_page(vma, page)	__flush_page_to_ram(page_address(page))

arch/mips/include/asm/cacheflush.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -61,6 +61,8 @@ static inline void flush_dcache_page(struct page *page) 
		SetPageDcacheDirty(page);

		SetPageDcacheDirty(page);

}

}





void flush_dcache_folio(struct folio *folio);



#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_lock(mapping)		do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)

#define flush_dcache_mmap_unlock(mapping)	do { } while (0)