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>
14 #define tlb_flush tlb_flush
15 static void tlb_flush(struct mmu_gather *tlb);
17 #include <asm-generic/tlb.h>
20 * get the tlbi levels in arm64. Default value is TLBI_TTL_UNKNOWN if more than
21 * one of cleared_* is set or neither is set - this elides the level hinting to
24 static inline int tlb_get_level(struct mmu_gather *tlb)
26 /* The TTL field is only valid for the leaf entry. */
27 if (tlb->freed_tables)
28 return TLBI_TTL_UNKNOWN;
30 if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
35 if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
40 if (tlb->cleared_puds && !(tlb->cleared_ptes ||
45 if (tlb->cleared_p4ds && !(tlb->cleared_ptes ||
50 return TLBI_TTL_UNKNOWN;
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 tlb_remove_ptdesc(tlb, ptdesc);
83 #if CONFIG_PGTABLE_LEVELS > 2
84 static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
87 struct ptdesc *ptdesc = virt_to_ptdesc(pmdp);
89 tlb_remove_ptdesc(tlb, ptdesc);
93 #if CONFIG_PGTABLE_LEVELS > 3
94 static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
97 struct ptdesc *ptdesc = virt_to_ptdesc(pudp);
99 if (!pgtable_l4_enabled())
102 tlb_remove_ptdesc(tlb, ptdesc);
106 #if CONFIG_PGTABLE_LEVELS > 4
107 static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4dp,
110 struct ptdesc *ptdesc = virt_to_ptdesc(p4dp);
112 if (!pgtable_l5_enabled())
115 tlb_remove_ptdesc(tlb, ptdesc);