Commit 63497b71 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

alpha: implement the new page table range API 

Add PFN_PTE_SHIFT, update_mmu_cache_range() and flush_icache_pages().

Link: https://lkml.kernel.org/r/20230802151406.3735276-8-willy@infradead.org


Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: default avatarMike Rapoport (IBM) <rppt@kernel.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent bcc6cc83

arch/alpha/include/asm/cacheflush.h

+10 −0
Original line number Diff line number Diff line
@@ -57,6 +57,16 @@ extern void flush_icache_user_page(struct vm_area_struct *vma, 
#define flush_icache_page(vma, page) \

	flush_icache_user_page((vma), (page), 0, 0)



/*

 * Both implementations of flush_icache_user_page flush the entire

 * address space, so one call, no matter how many pages.

 */

static inline void flush_icache_pages(struct vm_area_struct *vma,

		struct page *page, unsigned int nr)

{

	flush_icache_user_page(vma, page, 0, 0);

}



#include <asm-generic/cacheflush.h>



#endif /* _ALPHA_CACHEFLUSH_H */

arch/alpha/include/asm/pgtable.h

+8 −2
Original line number Diff line number Diff line
@@ -26,7 +26,6 @@ struct vm_area_struct; 
 * hook is made available.

 */

#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))

#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)



/* PMD_SHIFT determines the size of the area a second-level page table can map */

#define PMD_SHIFT	(PAGE_SHIFT + (PAGE_SHIFT-3))
@@ -189,7 +188,8 @@ extern unsigned long __zero_page(void); 
 * and a page entry and page directory to the page they refer to.

 */

#define page_to_pa(page)	(page_to_pfn(page) << PAGE_SHIFT)

#define pte_pfn(pte)	(pte_val(pte) >> 32)

#define PFN_PTE_SHIFT		32

#define pte_pfn(pte)		(pte_val(pte) >> PFN_PTE_SHIFT)



#define pte_page(pte)	pfn_to_page(pte_pfn(pte))

#define mk_pte(page, pgprot)						\
@@ -303,6 +303,12 @@ extern inline void update_mmu_cache(struct vm_area_struct * vma, 
{

}



static inline void update_mmu_cache_range(struct vm_fault *vmf,

		struct vm_area_struct *vma, unsigned long address,

		pte_t *ptep, unsigned int nr)

{

}



/*

 * Encode/decode swap entries and swap PTEs. Swap PTEs are all PTEs that

 * are !pte_none() && !pte_present().