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d9820ff76f
So far ARC pgtable_t has not been struct page based to avoid extra page_address() calls involved. However the differences are down to noise and get in the way of using generic code, hence this patch. This also allows us to reuse generic THP depost/withdraw code. There's some additional consideration for PGDIR_SHIFT in 4K page config. Now due to page tables being PAGE_SIZE deep only, the address split can't be really arbitrary. Tested-by: kernel test robot <lkp@intel.com> Suggested-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org>
68 lines
2 KiB
C
68 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef _ASM_ARC_HUGEPAGE_H
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#define _ASM_ARC_HUGEPAGE_H
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#include <linux/types.h>
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#include <asm-generic/pgtable-nopmd.h>
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static inline pte_t pmd_pte(pmd_t pmd)
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{
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return __pte(pmd_val(pmd));
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}
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static inline pmd_t pte_pmd(pte_t pte)
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{
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return __pmd(pte_val(pte));
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}
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#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
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#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
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#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
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#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
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#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
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#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
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#define pmd_mkinvalid(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
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#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
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#define pmd_write(pmd) pte_write(pmd_pte(pmd))
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#define pmd_young(pmd) pte_young(pmd_pte(pmd))
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#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
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#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
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#define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
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#define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
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#define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
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static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
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{
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/*
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* open-coded pte_modify() with additional retaining of HW_SZ bit
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* so that pmd_trans_huge() remains true for this PMD
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*/
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return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
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}
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static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
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pmd_t *pmdp, pmd_t pmd)
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{
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*pmdp = pmd;
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}
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extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
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pmd_t *pmd);
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#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
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extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
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unsigned long end);
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/* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/
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#define pmdp_establish generic_pmdp_establish
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#endif
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