diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/hash.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/hash.h | 60 |
1 files changed, 49 insertions, 11 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/hash.h b/arch/powerpc/include/asm/book3s/64/hash.h index 17e7a778c856..5a8cbd496731 100644 --- a/arch/powerpc/include/asm/book3s/64/hash.h +++ b/arch/powerpc/include/asm/book3s/64/hash.h @@ -4,6 +4,7 @@ #ifdef __KERNEL__ #include <asm/asm-const.h> +#include <asm/book3s/64/slice.h> /* * Common bits between 4K and 64K pages in a linux-style PTE. @@ -111,7 +112,7 @@ #define H_PMD_BAD_BITS (PTE_TABLE_SIZE-1) #define H_PUD_BAD_BITS (PMD_TABLE_SIZE-1) -#ifndef __ASSEMBLY__ +#ifndef __ASSEMBLER__ static inline int get_region_id(unsigned long ea) { int region_id; @@ -132,8 +133,22 @@ static inline int get_region_id(unsigned long ea) return region_id; } +static inline int hash__pmd_same(pmd_t pmd_a, pmd_t pmd_b) +{ + return (((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0); +} + #define hash__pmd_bad(pmd) (pmd_val(pmd) & H_PMD_BAD_BITS) + +/* + * pud comparison that will work with both pte and page table pointer. + */ +static inline int hash__pud_same(pud_t pud_a, pud_t pud_b) +{ + return (((pud_raw(pud_a) ^ pud_raw(pud_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0); +} #define hash__pud_bad(pud) (pud_val(pud) & H_PUD_BAD_BITS) + static inline int hash__p4d_bad(p4d_t p4d) { return (p4d_val(p4d) == 0); @@ -147,14 +162,10 @@ extern void hpte_need_flush(struct mm_struct *mm, unsigned long addr, pte_t *ptep, unsigned long pte, int huge); unsigned long htab_convert_pte_flags(unsigned long pteflags, unsigned long flags); /* Atomic PTE updates */ -static inline unsigned long hash__pte_update(struct mm_struct *mm, - unsigned long addr, - pte_t *ptep, unsigned long clr, - unsigned long set, - int huge) +static inline unsigned long hash__pte_update_one(pte_t *ptep, unsigned long clr, + unsigned long set) { __be64 old_be, tmp_be; - unsigned long old; __asm__ __volatile__( "1: ldarx %0,0,%3 # pte_update\n\ @@ -168,11 +179,40 @@ static inline unsigned long hash__pte_update(struct mm_struct *mm, : "r" (ptep), "r" (cpu_to_be64(clr)), "m" (*ptep), "r" (cpu_to_be64(H_PAGE_BUSY)), "r" (cpu_to_be64(set)) : "cc" ); + + return be64_to_cpu(old_be); +} + +static inline unsigned long hash__pte_update(struct mm_struct *mm, + unsigned long addr, + pte_t *ptep, unsigned long clr, + unsigned long set, + int huge) +{ + unsigned long old; + + old = hash__pte_update_one(ptep, clr, set); + + if (IS_ENABLED(CONFIG_PPC_4K_PAGES) && huge) { + unsigned int psize = get_slice_psize(mm, addr); + int nb, i; + + if (psize == MMU_PAGE_16M) + nb = SZ_16M / PMD_SIZE; + else if (psize == MMU_PAGE_16G) + nb = SZ_16G / PUD_SIZE; + else + nb = 1; + + WARN_ON_ONCE(nb == 1); /* Should never happen */ + + for (i = 1; i < nb; i++) + hash__pte_update_one(ptep + i, clr, set); + } /* huge pages use the old page table lock */ if (!huge) assert_pte_locked(mm, addr); - old = be64_to_cpu(old_be); if (old & H_PAGE_HASHPTE) hpte_need_flush(mm, addr, ptep, old, huge); @@ -255,8 +295,6 @@ int hash__create_section_mapping(unsigned long start, unsigned long end, int nid, pgprot_t prot); int hash__remove_section_mapping(unsigned long start, unsigned long end); -void hash__kernel_map_pages(struct page *page, int numpages, int enable); - -#endif /* !__ASSEMBLY__ */ +#endif /* !__ASSEMBLER__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_BOOK3S_64_HASH_H */ |