diff options
Diffstat (limited to 'arch/powerpc/mm/tlb_hash64.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_hash64.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c index 023ec8a13f38..48bf63ea6525 100644 --- a/arch/powerpc/mm/tlb_hash64.c +++ b/arch/powerpc/mm/tlb_hash64.c @@ -219,3 +219,30 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start, arch_leave_lazy_mmu_mode(); local_irq_restore(flags); } + +void flush_tlb_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr) +{ + pte_t *pte; + pte_t *start_pte; + unsigned long flags; + + addr = _ALIGN_DOWN(addr, PMD_SIZE); + /* Note: Normally, we should only ever use a batch within a + * PTE locked section. This violates the rule, but will work + * since we don't actually modify the PTEs, we just flush the + * hash while leaving the PTEs intact (including their reference + * to being hashed). This is not the most performance oriented + * way to do things but is fine for our needs here. + */ + local_irq_save(flags); + arch_enter_lazy_mmu_mode(); + start_pte = pte_offset_map(pmd, addr); + for (pte = start_pte; pte < start_pte + PTRS_PER_PTE; pte++) { + unsigned long pteval = pte_val(*pte); + if (pteval & _PAGE_HASHPTE) + hpte_need_flush(mm, addr, pte, pteval, 0); + addr += PAGE_SIZE; + } + arch_leave_lazy_mmu_mode(); + local_irq_restore(flags); +} |