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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm64/include/asm/tlb.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/include/asm/tlb.h')
-rw-r--r-- | arch/arm64/include/asm/tlb.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h new file mode 100644 index 0000000000..2c29239d05 --- /dev/null +++ b/arch/arm64/include/asm/tlb.h @@ -0,0 +1,103 @@ +/* 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 <linux/pagemap.h> +#include <linux/swap.h> + +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 <asm-generic/tlb.h> + +/* + * 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) +{ + struct ptdesc *ptdesc = page_ptdesc(pte); + + pagetable_pte_dtor(ptdesc); + tlb_remove_ptdesc(tlb, ptdesc); +} + +#if CONFIG_PGTABLE_LEVELS > 2 +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, + unsigned long addr) +{ + struct ptdesc *ptdesc = virt_to_ptdesc(pmdp); + + pagetable_pmd_dtor(ptdesc); + tlb_remove_ptdesc(tlb, ptdesc); +} +#endif + +#if CONFIG_PGTABLE_LEVELS > 3 +static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, + unsigned long addr) +{ + tlb_remove_ptdesc(tlb, virt_to_ptdesc(pudp)); +} +#endif + +#endif |