^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Based on arch/arm/include/asm/tlb.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2002 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2012 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #ifndef __ASM_TLB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define __ASM_TLB_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/swap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static inline void __tlb_remove_table(void *_table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) free_page_and_swap_cache((struct page *)_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define tlb_flush tlb_flush
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static void tlb_flush(struct mmu_gather *tlb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm-generic/tlb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * get the tlbi levels in arm64. Default value is 0 if more than one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * of cleared_* is set or neither is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Arm64 doesn't support p4ds now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static inline int tlb_get_level(struct mmu_gather *tlb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) /* The TTL field is only valid for the leaf entry. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (tlb->freed_tables)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (tlb->cleared_ptes && !(tlb->cleared_pmds ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) tlb->cleared_puds ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) tlb->cleared_p4ds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) return 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (tlb->cleared_pmds && !(tlb->cleared_ptes ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) tlb->cleared_puds ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) tlb->cleared_p4ds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (tlb->cleared_puds && !(tlb->cleared_ptes ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) tlb->cleared_pmds ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) tlb->cleared_p4ds))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static inline void tlb_flush(struct mmu_gather *tlb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) bool last_level = !tlb->freed_tables;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned long stride = tlb_get_unmap_size(tlb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) int tlb_level = tlb_get_level(tlb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * If we're tearing down the address space then we only care about
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * invalidating the walk-cache, since the ASID allocator won't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * reallocate our ASID without invalidating the entire TLB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (tlb->fullmm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!last_level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) flush_tlb_mm(tlb->mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __flush_tlb_range(&vma, tlb->start, tlb->end, stride,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) last_level, tlb_level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) pgtable_pte_page_dtor(pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) tlb_remove_table(tlb, pte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #if CONFIG_PGTABLE_LEVELS > 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct page *page = virt_to_page(pmdp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) pgtable_pmd_page_dtor(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) tlb_remove_table(tlb, page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #if CONFIG_PGTABLE_LEVELS > 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) tlb_remove_table(tlb, virt_to_page(pudp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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