tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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