From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/arm64/include/asm/tlb.h | 101 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 arch/arm64/include/asm/tlb.h (limited to 'arch/arm64/include/asm/tlb.h') diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h new file mode 100644 index 000000000..c995d1f45 --- /dev/null +++ b/arch/arm64/include/asm/tlb.h @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Based on arch/arm/include/asm/tlb.h + * + * Copyright (C) 2002 Russell King + * Copyright (C) 2012 ARM Ltd. + */ +#ifndef __ASM_TLB_H +#define __ASM_TLB_H + +#include +#include + +static inline void __tlb_remove_table(void *_table) +{ + free_page_and_swap_cache((struct page *)_table); +} + +#define tlb_flush tlb_flush +static void tlb_flush(struct mmu_gather *tlb); + +#include + +/* + * get the tlbi levels in arm64. Default value is 0 if more than one + * of cleared_* is set or neither is set. + * Arm64 doesn't support p4ds now. + */ +static inline int tlb_get_level(struct mmu_gather *tlb) +{ + /* The TTL field is only valid for the leaf entry. */ + if (tlb->freed_tables) + return 0; + + if (tlb->cleared_ptes && !(tlb->cleared_pmds || + tlb->cleared_puds || + tlb->cleared_p4ds)) + return 3; + + if (tlb->cleared_pmds && !(tlb->cleared_ptes || + tlb->cleared_puds || + tlb->cleared_p4ds)) + return 2; + + if (tlb->cleared_puds && !(tlb->cleared_ptes || + tlb->cleared_pmds || + tlb->cleared_p4ds)) + return 1; + + return 0; +} + +static inline void tlb_flush(struct mmu_gather *tlb) +{ + struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0); + bool last_level = !tlb->freed_tables; + unsigned long stride = tlb_get_unmap_size(tlb); + int tlb_level = tlb_get_level(tlb); + + /* + * If we're tearing down the address space then we only care about + * invalidating the walk-cache, since the ASID allocator won't + * reallocate our ASID without invalidating the entire TLB. + */ + if (tlb->fullmm) { + if (!last_level) + flush_tlb_mm(tlb->mm); + return; + } + + __flush_tlb_range(&vma, tlb->start, tlb->end, stride, + last_level, tlb_level); +} + +static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, + unsigned long addr) +{ + pgtable_pte_page_dtor(pte); + tlb_remove_table(tlb, pte); +} + +#if CONFIG_PGTABLE_LEVELS > 2 +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, + unsigned long addr) +{ + struct page *page = virt_to_page(pmdp); + + pgtable_pmd_page_dtor(page); + tlb_remove_table(tlb, page); +} +#endif + +#if CONFIG_PGTABLE_LEVELS > 3 +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, + unsigned long addr) +{ + tlb_remove_table(tlb, virt_to_page(pudp)); +} +#endif + +#endif -- cgit v1.2.3