diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/hugetlbpage.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hugetlbpage.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/powerpc/mm/book3s64/hugetlbpage.c b/arch/powerpc/mm/book3s64/hugetlbpage.c index 5a2e512e96db..2bcbbf9d85ac 100644 --- a/arch/powerpc/mm/book3s64/hugetlbpage.c +++ b/arch/powerpc/mm/book3s64/hugetlbpage.c @@ -53,6 +53,16 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, /* If PTE permissions don't match, take page fault */ if (unlikely(!check_pte_access(access, old_pte))) return 1; + /* + * If hash-4k, hugepages use seeral contiguous PxD entries + * so bail out and let mm make the page young or dirty + */ + if (IS_ENABLED(CONFIG_PPC_4K_PAGES)) { + if (!(old_pte & _PAGE_ACCESSED)) + return 1; + if ((access & _PAGE_WRITE) && !(old_pte & _PAGE_DIRTY)) + return 1; + } /* * Try to lock the PTE, add ACCESSED and DIRTY if it was @@ -64,7 +74,7 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, } while(!pte_xchg(ptep, __pte(old_pte), __pte(new_pte))); /* Make sure this is a hugetlb entry */ - if (old_pte & (H_PAGE_THP_HUGE | _PAGE_DEVMAP)) + if (old_pte & H_PAGE_THP_HUGE) return 0; rflags = htab_convert_pte_flags(new_pte, flags); |