diff options
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 77 |
1 files changed, 63 insertions, 14 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 68942f4c8668..882d6f4aad25 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -270,6 +270,9 @@ static inline int is_module_addr(void *addr) #define _REGION3_ENTRY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_LENGTH) #define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID) +#define _REGION3_ENTRY_ORIGIN_LARGE ~0x7fffffffUL /* large page address */ +#define _REGION3_ENTRY_ORIGIN ~0x7ffUL/* region third table origin */ + #define _REGION3_ENTRY_DIRTY 0x2000 /* SW region dirty bit */ #define _REGION3_ENTRY_YOUNG 0x1000 /* SW region young bit */ #define _REGION3_ENTRY_LARGE 0x0400 /* RTTE-format control, large page */ @@ -525,6 +528,16 @@ static inline int pud_large(pud_t pud) return !!(pud_val(pud) & _REGION3_ENTRY_LARGE); } +static inline unsigned long pud_pfn(pud_t pud) +{ + unsigned long origin_mask; + + origin_mask = _REGION3_ENTRY_ORIGIN; + if (pud_large(pud)) + origin_mask = _REGION3_ENTRY_ORIGIN_LARGE; + return (pud_val(pud) & origin_mask) >> PAGE_SHIFT; +} + static inline int pud_bad(pud_t pud) { /* @@ -1020,20 +1033,6 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) #define pte_unmap(pte) do { } while (0) -#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE) -static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) -{ - /* - * pgprot is PAGE_NONE, PAGE_READ, or PAGE_WRITE (see __Pxxx / __Sxxx) - * Convert to segment table entry format. - */ - if (pgprot_val(pgprot) == pgprot_val(PAGE_NONE)) - return pgprot_val(SEGMENT_NONE); - if (pgprot_val(pgprot) == pgprot_val(PAGE_READ)) - return pgprot_val(SEGMENT_READ); - return pgprot_val(SEGMENT_WRITE); -} - static inline pmd_t pmd_wrprotect(pmd_t pmd) { pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE; @@ -1070,6 +1069,56 @@ static inline pmd_t pmd_mkdirty(pmd_t pmd) return pmd; } +static inline pud_t pud_wrprotect(pud_t pud) +{ + pud_val(pud) &= ~_REGION3_ENTRY_WRITE; + pud_val(pud) |= _REGION_ENTRY_PROTECT; + return pud; +} + +static inline pud_t pud_mkwrite(pud_t pud) +{ + pud_val(pud) |= _REGION3_ENTRY_WRITE; + if (pud_large(pud) && !(pud_val(pud) & _REGION3_ENTRY_DIRTY)) + return pud; + pud_val(pud) &= ~_REGION_ENTRY_PROTECT; + return pud; +} + +static inline pud_t pud_mkclean(pud_t pud) +{ + if (pud_large(pud)) { + pud_val(pud) &= ~_REGION3_ENTRY_DIRTY; + pud_val(pud) |= _REGION_ENTRY_PROTECT; + } + return pud; +} + +static inline pud_t pud_mkdirty(pud_t pud) +{ + if (pud_large(pud)) { + pud_val(pud) |= _REGION3_ENTRY_DIRTY | + _REGION3_ENTRY_SOFT_DIRTY; + if (pud_val(pud) & _REGION3_ENTRY_WRITE) + pud_val(pud) &= ~_REGION_ENTRY_PROTECT; + } + return pud; +} + +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE) +static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) +{ + /* + * pgprot is PAGE_NONE, PAGE_READ, or PAGE_WRITE (see __Pxxx / __Sxxx) + * Convert to segment table entry format. + */ + if (pgprot_val(pgprot) == pgprot_val(PAGE_NONE)) + return pgprot_val(SEGMENT_NONE); + if (pgprot_val(pgprot) == pgprot_val(PAGE_READ)) + return pgprot_val(SEGMENT_READ); + return pgprot_val(SEGMENT_WRITE); +} + static inline pmd_t pmd_mkyoung(pmd_t pmd) { if (pmd_large(pmd)) { |