diff options
Diffstat (limited to 'arch/powerpc/mm/tlb_hash64.c')
| -rw-r--r-- | arch/powerpc/mm/tlb_hash64.c | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c index 0d82ef50dc3..c99f6510a0b 100644 --- a/arch/powerpc/mm/tlb_hash64.c +++ b/arch/powerpc/mm/tlb_hash64.c @@ -23,7 +23,6 @@ #include <linux/kernel.h> #include <linux/mm.h> -#include <linux/init.h> #include <linux/percpu.h> #include <linux/hardirq.h> #include <asm/pgalloc.h> @@ -82,11 +81,11 @@ void hpte_need_flush(struct mm_struct *mm, unsigned long addr, if (!is_kernel_addr(addr)) { ssize = user_segment_size(addr); vsid = get_vsid(mm->context.id, addr, ssize); - WARN_ON(vsid == 0); } else { vsid = get_kernel_vsid(addr, mmu_kernel_ssize); ssize = mmu_kernel_ssize; } + WARN_ON(vsid == 0); vpn = hpt_vpn(addr, vsid, ssize); rpte = __real_pte(__pte(pte), ptep); @@ -183,12 +182,13 @@ void tlb_flush(struct mmu_gather *tlb) * since 64K pages may overlap with other bridges when using 64K pages * with 4K HW pages on IO space. * - * Because of that usage pattern, it's only available with CONFIG_HOTPLUG - * and is implemented for small size rather than speed. + * Because of that usage pattern, it is implemented for small size rather + * than speed. */ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start, unsigned long end) { + int hugepage_shift; unsigned long flags; start = _ALIGN_DOWN(start, PAGE_SIZE); @@ -206,7 +206,8 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start, local_irq_save(flags); arch_enter_lazy_mmu_mode(); for (; start < end; start += PAGE_SIZE) { - pte_t *ptep = find_linux_pte(mm->pgd, start); + pte_t *ptep = find_linux_pte_or_hugepte(mm->pgd, start, + &hugepage_shift); unsigned long pte; if (ptep == NULL) @@ -214,7 +215,37 @@ void __flush_hash_table_range(struct mm_struct *mm, unsigned long start, pte = pte_val(*ptep); if (!(pte & _PAGE_HASHPTE)) continue; - hpte_need_flush(mm, start, ptep, pte, 0); + if (unlikely(hugepage_shift && pmd_trans_huge(*(pmd_t *)pte))) + hpte_do_hugepage_flush(mm, start, (pmd_t *)pte); + else + hpte_need_flush(mm, start, ptep, pte, 0); + } + 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); |