diff options
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage-hash64.c')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage-hash64.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hugetlbpage-hash64.c b/arch/powerpc/mm/hugetlbpage-hash64.c index 2e6a8f9345d3..b0d9209d9a86 100644 --- a/arch/powerpc/mm/hugetlbpage-hash64.c +++ b/arch/powerpc/mm/hugetlbpage-hash64.c @@ -26,7 +26,7 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, real_pte_t rpte; unsigned long vpn; unsigned long old_pte, new_pte; - unsigned long rflags, pa, sz; + unsigned long rflags, pa; long slot, offset; BUG_ON(shift != mmu_psize_defs[mmu_psize].shift); @@ -73,7 +73,6 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, offset = PTRS_PER_PMD; rpte = __real_pte(__pte(old_pte), ptep, offset); - sz = ((1UL) << shift); if (!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) /* No CPU has hugepages but lacks no execute, so we * don't need to worry about that case */ @@ -121,3 +120,28 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid, *ptep = __pte(new_pte & ~H_PAGE_BUSY); return 0; } + +pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep) +{ + unsigned long pte_val; + /* + * Clear the _PAGE_PRESENT so that no hardware parallel update is + * possible. Also keep the pte_present true so that we don't take + * wrong fault. + */ + pte_val = pte_update(vma->vm_mm, addr, ptep, + _PAGE_PRESENT, _PAGE_INVALID, 1); + + return __pte(pte_val); +} + +void huge_ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, + pte_t *ptep, pte_t old_pte, pte_t pte) +{ + + if (radix_enabled()) + return radix__huge_ptep_modify_prot_commit(vma, addr, ptep, + old_pte, pte); + set_huge_pte_at(vma->vm_mm, addr, ptep, pte); +} |