diff options
Diffstat (limited to 'include/asm-s390/pgalloc.h')
| -rw-r--r-- | include/asm-s390/pgalloc.h | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h index cc47dd65a49..f5b2bf3d7c1 100644 --- a/include/asm-s390/pgalloc.h +++ b/include/asm-s390/pgalloc.h @@ -73,9 +73,16 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm) static inline unsigned long pgd_entry_type(struct mm_struct *mm) { + if (mm->context.asce_limit <= (1UL << 31)) + return _SEGMENT_ENTRY_EMPTY; + if (mm->context.asce_limit <= (1UL << 42)) + return _REGION3_ENTRY_EMPTY; return _REGION2_ENTRY_EMPTY; } +int crst_table_upgrade(struct mm_struct *, unsigned long limit); +void crst_table_downgrade(struct mm_struct *, unsigned long limit); + static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) { unsigned long *table = crst_table_alloc(mm, mm->context.noexec); @@ -102,12 +109,12 @@ static inline void pgd_populate_kernel(struct mm_struct *mm, static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) { - pgd_t *shadow_pgd = get_shadow_table(pgd); - pud_t *shadow_pud = get_shadow_table(pud); - - if (shadow_pgd && shadow_pud) - pgd_populate_kernel(mm, shadow_pgd, shadow_pud); pgd_populate_kernel(mm, pgd, pud); + if (mm->context.noexec) { + pgd = get_shadow_table(pgd); + pud = get_shadow_table(pud); + pgd_populate_kernel(mm, pgd, pud); + } } static inline void pud_populate_kernel(struct mm_struct *mm, @@ -130,14 +137,9 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - unsigned long *crst; - INIT_LIST_HEAD(&mm->context.crst_list); INIT_LIST_HEAD(&mm->context.pgtable_list); - crst = crst_table_alloc(mm, s390_noexec); - if (crst) - crst_table_init(crst, pgd_entry_type(mm)); - return (pgd_t *) crst; + return (pgd_t *) crst_table_alloc(mm, s390_noexec); } #define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd) |