1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Based on arch/arm/include/asm/tlb.h
5 * Copyright (C) 2002 Russell King
6 * Copyright (C) 2012 ARM Ltd.
11 #include <linux/pagemap.h>
12 #include <linux/swap.h>
14 static inline void __tlb_remove_table(void *_table)
16 free_page_and_swap_cache((struct page *)_table);
19 #define tlb_flush tlb_flush
20 static void tlb_flush(struct mmu_gather *tlb);
22 #include <asm-generic/tlb.h>
25 * get the tlbi levels in arm64. Default value is 0 if more than one
26 * of cleared_* is set or neither is set.
27 * Arm64 doesn't support p4ds now.
29 static inline int tlb_get_level(struct mmu_gather *tlb)
31 /* The TTL field is only valid for the leaf entry. */
32 if (tlb->freed_tables)
35 if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
40 if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
45 if (tlb->cleared_puds && !(tlb->cleared_ptes ||
53 static inline void tlb_flush(struct mmu_gather *tlb)
55 struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
56 bool last_level = !tlb->freed_tables;
57 unsigned long stride = tlb_get_unmap_size(tlb);
58 int tlb_level = tlb_get_level(tlb);
61 * If we're tearing down the address space then we only care about
62 * invalidating the walk-cache, since the ASID allocator won't
63 * reallocate our ASID without invalidating the entire TLB.
67 flush_tlb_mm(tlb->mm);
71 __flush_tlb_range(&vma, tlb->start, tlb->end, stride,
72 last_level, tlb_level);
75 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
78 struct ptdesc *ptdesc = page_ptdesc(pte);
80 pagetable_pte_dtor(ptdesc);
81 tlb_remove_ptdesc(tlb, ptdesc);
84 #if CONFIG_PGTABLE_LEVELS > 2
85 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
88 struct ptdesc *ptdesc = virt_to_ptdesc(pmdp);
90 pagetable_pmd_dtor(ptdesc);
91 tlb_remove_ptdesc(tlb, ptdesc);
95 #if CONFIG_PGTABLE_LEVELS > 3
96 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
99 struct ptdesc *ptdesc = virt_to_ptdesc(pudp);
101 pagetable_pud_dtor(ptdesc);
102 tlb_remove_ptdesc(tlb, ptdesc);