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

			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,

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

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

arch/arc/include/asm/cacheflush.h

+1 −0
Original line number 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



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_inv(phys_addr_t start, unsigned long sz);

arch/arm/include/asm/cacheflush.h

+1 −0
Original line number 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

extern void flush_dcache_page(struct page *);

void flush_dcache_folio(struct folio *folio);



#define ARCH_IMPLEMENTS_FLUSH_KERNEL_VMAP_RANGE 1

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

arch/m68k/include/asm/cacheflush_mm.h

+1 −0
Original line number 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 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_unlock(mapping)	do { } while (0)

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

arch/mips/include/asm/cacheflush.h

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

}



void flush_dcache_folio(struct folio *folio);



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

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