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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/arm/include/asm/tlb.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/asm/tlb.h')
-rw-r--r-- | arch/arm/include/asm/tlb.h | 68 |
1 files changed, 68 insertions, 0 deletions
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 <asm/cacheflush.h> + +#ifndef CONFIG_MMU + +#include <linux/pagemap.h> + +#define tlb_flush(tlb) ((void) tlb) + +#include <asm-generic/tlb.h> + +#else /* !CONFIG_MMU */ + +#include <linux/swap.h> +#include <asm/tlbflush.h> + +static inline void __tlb_remove_table(void *_table) +{ + free_page_and_swap_cache((struct page *)_table); +} + +#include <asm-generic/tlb.h> + +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 |