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97 lines
2.2 KiB
97 lines
2.2 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Based on arch/arm/include/asm/tlb.h |
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* |
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* Copyright (C) 2002 Russell King |
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* Copyright (C) 2012 ARM Ltd. |
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*/ |
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#ifndef __ASM_TLB_H |
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#define __ASM_TLB_H |
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#include <linux/pagemap.h> |
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#include <linux/swap.h> |
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static inline void __tlb_remove_table(void *_table) |
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{ |
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free_page_and_swap_cache((struct page *)_table); |
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} |
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#define tlb_flush tlb_flush |
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static void tlb_flush(struct mmu_gather *tlb); |
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#include <asm-generic/tlb.h> |
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/* |
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* get the tlbi levels in arm64. Default value is 0 if more than one |
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* of cleared_* is set or neither is set. |
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* Arm64 doesn't support p4ds now. |
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*/ |
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static inline int tlb_get_level(struct mmu_gather *tlb) |
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{ |
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if (tlb->cleared_ptes && !(tlb->cleared_pmds || |
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tlb->cleared_puds || |
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tlb->cleared_p4ds)) |
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return 3; |
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if (tlb->cleared_pmds && !(tlb->cleared_ptes || |
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tlb->cleared_puds || |
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tlb->cleared_p4ds)) |
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return 2; |
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if (tlb->cleared_puds && !(tlb->cleared_ptes || |
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tlb->cleared_pmds || |
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tlb->cleared_p4ds)) |
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return 1; |
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return 0; |
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} |
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static inline void tlb_flush(struct mmu_gather *tlb) |
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{ |
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struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0); |
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bool last_level = !tlb->freed_tables; |
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unsigned long stride = tlb_get_unmap_size(tlb); |
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int tlb_level = tlb_get_level(tlb); |
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/* |
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* If we're tearing down the address space then we only care about |
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* invalidating the walk-cache, since the ASID allocator won't |
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* reallocate our ASID without invalidating the entire TLB. |
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*/ |
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if (tlb->fullmm) { |
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if (!last_level) |
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flush_tlb_mm(tlb->mm); |
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return; |
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} |
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__flush_tlb_range(&vma, tlb->start, tlb->end, stride, |
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last_level, tlb_level); |
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} |
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, |
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unsigned long addr) |
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{ |
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pgtable_pte_page_dtor(pte); |
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tlb_remove_table(tlb, pte); |
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} |
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#if CONFIG_PGTABLE_LEVELS > 2 |
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static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, |
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unsigned long addr) |
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{ |
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struct page *page = virt_to_page(pmdp); |
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pgtable_pmd_page_dtor(page); |
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tlb_remove_table(tlb, page); |
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} |
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#endif |
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#if CONFIG_PGTABLE_LEVELS > 3 |
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static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, |
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unsigned long addr) |
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{ |
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tlb_remove_table(tlb, virt_to_page(pudp)); |
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} |
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#endif |
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#endif
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