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/arm/include/asm/tlb.h | 68 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 arch/arm/include/asm/tlb.h (limited to 'arch/arm/include/asm/tlb.h') diff --git a/arch/arm/include/asm/tlb.h b/arch/arm/include/asm/tlb.h new file mode 100644 index 000000000..b8cbe03ad --- /dev/null +++ b/arch/arm/include/asm/tlb.h @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * arch/arm/include/asm/tlb.h + * + * Copyright (C) 2002 Russell King + * + * Experimentation shows that on a StrongARM, it appears to be faster + * to use the "invalidate whole tlb" rather than "invalidate single + * tlb" for this. + * + * This appears true for both the process fork+exit case, as well as + * the munmap-large-area case. + */ +#ifndef __ASMARM_TLB_H +#define __ASMARM_TLB_H + +#include + +#ifndef CONFIG_MMU + +#include + +#define tlb_flush(tlb) ((void) tlb) + +#include + +#else /* !CONFIG_MMU */ + +#include +#include + +static inline void __tlb_remove_table(void *_table) +{ + free_page_and_swap_cache((struct page *)_table); +} + +#include + +static inline void +__pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr) +{ + pgtable_pte_page_dtor(pte); + +#ifndef CONFIG_ARM_LPAE + /* + * With the classic ARM MMU, a pte page has two corresponding pmd + * entries, each covering 1MB. + */ + addr = (addr & PMD_MASK) + SZ_1M; + __tlb_adjust_range(tlb, addr - PAGE_SIZE, 2 * PAGE_SIZE); +#endif + + tlb_remove_table(tlb, pte); +} + +static inline void +__pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr) +{ +#ifdef CONFIG_ARM_LPAE + struct page *page = virt_to_page(pmdp); + + pgtable_pmd_page_dtor(page); + tlb_remove_table(tlb, page); +#endif +} + +#endif /* CONFIG_MMU */ +#endif -- cgit v1.2.3