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53fbef56e0
Patch series "Add and use memdesc_flags_t". At some point struct page will be separated from struct slab and struct folio. This is a step towards that by introducing a type for the 'flags' word of all three structures. This gives us a certain amount of type safety by establishing that some of these unsigned longs are different from other unsigned longs in that they contain things like node ID, section number and zone number in the upper bits. That lets us have functions that can be easily called by anyone who has a slab, folio or page (but not easily by anyone else) to get the node or zone. There's going to be some unusual merge problems with this as some odd bits of the kernel decide they want to print out the flags value or something similar by writing page->flags and now they'll need to write page->flags.f instead. That's most of the churn here. Maybe we should be removing these things from the debug output? This patch (of 11): Wrap the unsigned long flags in a typedef. In upcoming patches, this will provide a strong hint that you can't just pass a random unsigned long to functions which take this as an argument. [willy@infradead.org: s/flags/flags.f/ in several architectures] Link: https://lkml.kernel.org/r/aKMgPRLD-WnkPxYm@casper.infradead.org [nicola.vetrini@gmail.com: mips: fix compilation error] Link: https://lore.kernel.org/lkml/CA+G9fYvkpmqGr6wjBNHY=dRp71PLCoi2341JxOudi60yqaeUdg@mail.gmail.com/ Link: https://lkml.kernel.org/r/20250825214245.1838158-1-nicola.vetrini@gmail.com Link: https://lkml.kernel.org/r/20250805172307.1302730-1-willy@infradead.org Link: https://lkml.kernel.org/r/20250805172307.1302730-2-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Acked-by: Zi Yan <ziy@nvidia.com> Cc: Shakeel Butt <shakeel.butt@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm64/include/asm/hugetlb.h
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*
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* Copyright (C) 2013 Linaro Ltd.
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*
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* Based on arch/x86/include/asm/hugetlb.h
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*/
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#ifndef __ASM_HUGETLB_H
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#define __ASM_HUGETLB_H
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#include <asm/cacheflush.h>
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#include <asm/mte.h>
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#include <asm/page.h>
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#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
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#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
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extern bool arch_hugetlb_migration_supported(struct hstate *h);
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#endif
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static inline void arch_clear_hugetlb_flags(struct folio *folio)
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{
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clear_bit(PG_dcache_clean, &folio->flags.f);
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#ifdef CONFIG_ARM64_MTE
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if (system_supports_mte()) {
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clear_bit(PG_mte_tagged, &folio->flags.f);
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clear_bit(PG_mte_lock, &folio->flags.f);
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}
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#endif
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}
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#define arch_clear_hugetlb_flags arch_clear_hugetlb_flags
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pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags);
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#define arch_make_huge_pte arch_make_huge_pte
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#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
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extern void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, pte_t pte, unsigned long sz);
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#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
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extern int huge_ptep_set_access_flags(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t pte, int dirty);
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#define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
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extern pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, unsigned long sz);
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#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
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extern void huge_ptep_set_wrprotect(struct mm_struct *mm,
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unsigned long addr, pte_t *ptep);
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#define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
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extern pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep);
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#define __HAVE_ARCH_HUGE_PTE_CLEAR
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extern void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
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pte_t *ptep, unsigned long sz);
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#define __HAVE_ARCH_HUGE_PTEP_GET
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extern pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
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void __init arm64_hugetlb_cma_reserve(void);
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#define huge_ptep_modify_prot_start huge_ptep_modify_prot_start
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extern pte_t huge_ptep_modify_prot_start(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep);
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#define huge_ptep_modify_prot_commit huge_ptep_modify_prot_commit
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extern void huge_ptep_modify_prot_commit(struct vm_area_struct *vma,
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unsigned long addr, pte_t *ptep,
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pte_t old_pte, pte_t new_pte);
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#include <asm-generic/hugetlb.h>
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static inline void __flush_hugetlb_tlb_range(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long end,
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unsigned long stride,
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bool last_level)
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{
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switch (stride) {
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#ifndef __PAGETABLE_PMD_FOLDED
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case PUD_SIZE:
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__flush_tlb_range(vma, start, end, PUD_SIZE, last_level, 1);
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break;
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#endif
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case CONT_PMD_SIZE:
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case PMD_SIZE:
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__flush_tlb_range(vma, start, end, PMD_SIZE, last_level, 2);
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break;
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case CONT_PTE_SIZE:
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__flush_tlb_range(vma, start, end, PAGE_SIZE, last_level, 3);
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break;
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default:
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__flush_tlb_range(vma, start, end, PAGE_SIZE, last_level, TLBI_TTL_UNKNOWN);
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}
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}
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#define __HAVE_ARCH_FLUSH_HUGETLB_TLB_RANGE
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static inline void flush_hugetlb_tlb_range(struct vm_area_struct *vma,
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unsigned long start,
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unsigned long end)
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{
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unsigned long stride = huge_page_size(hstate_vma(vma));
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__flush_hugetlb_tlb_range(vma, start, end, stride, false);
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}
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#endif /* __ASM_HUGETLB_H */
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