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alpha: implement the new page table range API

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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: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Mike 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: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-08-02 16:13:35 +01:00 committed by Andrew Morton
parent bcc6cc8325
commit 63497b716b
2 changed files with 18 additions and 2 deletions
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10
arch/alpha/include/asm/cacheflush.h
View file

@ -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 */

10
arch/alpha/include/asm/pgtable.h
View file

@ -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().