LXR linux/arch/arm64/include/asm/tlb.h

   1/*
   2 * Based on arch/arm/include/asm/tlb.h
   3 *
   4 * Copyright (C) 2002 Russell King
   5 * Copyright (C) 2012 ARM Ltd.
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19#ifndef __ASM_TLB_H
  20#define __ASM_TLB_H
  21
  22#include <linux/pagemap.h>
  23#include <linux/swap.h>
  24
  25#ifdef CONFIG_HAVE_RCU_TABLE_FREE
  26
  27#define tlb_remove_entry(tlb, entry)    tlb_remove_table(tlb, entry)
  28static inline void __tlb_remove_table(void *_table)
  29{
  30        free_page_and_swap_cache((struct page *)_table);
  31}
  32#else
  33#define tlb_remove_entry(tlb, entry)    tlb_remove_page(tlb, entry)
  34#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
  35
  36#include <asm-generic/tlb.h>
  37
  38static inline void tlb_flush(struct mmu_gather *tlb)
  39{
  40        struct vm_area_struct vma = { .vm_mm = tlb->mm, };
  41
  42        /*
  43         * The ASID allocator will either invalidate the ASID or mark
  44         * it as used.
  45         */
  46        if (tlb->fullmm)
  47                return;
  48
  49        /*
  50         * The intermediate page table levels are already handled by
  51         * the __(pte|pmd|pud)_free_tlb() functions, so last level
  52         * TLBI is sufficient here.
  53         */
  54        __flush_tlb_range(&vma, tlb->start, tlb->end, true);
  55}
  56
  57static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
  58                                  unsigned long addr)
  59{
  60        __flush_tlb_pgtable(tlb->mm, addr);
  61        pgtable_page_dtor(pte);
  62        tlb_remove_entry(tlb, pte);
  63}
  64
  65#if CONFIG_PGTABLE_LEVELS > 2
  66static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
  67                                  unsigned long addr)
  68{
  69        __flush_tlb_pgtable(tlb->mm, addr);
  70        tlb_remove_entry(tlb, virt_to_page(pmdp));
  71}
  72#endif
  73
  74#if CONFIG_PGTABLE_LEVELS > 3
  75static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
  76                                  unsigned long addr)
  77{
  78        __flush_tlb_pgtable(tlb->mm, addr);
  79        tlb_remove_entry(tlb, virt_to_page(pudp));
  80}
  81#endif
  82
  83#endif
  84