mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-10-30 13:52:50 +01:00
Qi Zheng
440af48d68
Like other levels of page tables, also use mmu gather mechanism to free p4d level page table. Link: https://lkml.kernel.org/r/3fd48525397b34a64f7c0eb76746da30814dc941.1736317725.git.zhengqi.arch@bytedance.com Signed-off-by: Qi Zheng <[email protected]> Originally-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Kevin Brodsky <[email protected]> Cc: Alexander Gordeev <[email protected]> Cc: Alexandre Ghiti <[email protected]> Cc: Alexandre Ghiti <[email protected]> Cc: Andreas Larsson <[email protected]> Cc: Aneesh Kumar K.V (Arm) <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: David Rientjes <[email protected]> Cc: Hugh Dickins <[email protected]> Cc: Jann Horn <[email protected]> Cc: Lorenzo Stoakes <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Cc: Mike Rapoport (Microsoft) <[email protected]> Cc: Muchun Song <[email protected]> Cc: Nicholas Piggin <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Ryan Roberts <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vishal Moola (Oracle) <[email protected]> Cc: Will Deacon <[email protected]> Cc: Yu Zhao <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Based on arch/arm/include/asm/pgalloc.h
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*
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* Copyright (C) 2000-2001 Russell King
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* Copyright (C) 2012 ARM Ltd.
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*/
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#ifndef __ASM_PGALLOC_H
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#define __ASM_PGALLOC_H
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#include <asm/pgtable-hwdef.h>
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#include <asm/processor.h>
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#define __HAVE_ARCH_PGD_FREE
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#define __HAVE_ARCH_PUD_FREE
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#include <asm-generic/pgalloc.h>
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#define PGD_SIZE (PTRS_PER_PGD * sizeof(pgd_t))
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#if CONFIG_PGTABLE_LEVELS > 2
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static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
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{
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set_pud(pudp, __pud(__phys_to_pud_val(pmdp) | prot));
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}
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static inline void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmdp)
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{
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pudval_t pudval = PUD_TYPE_TABLE | PUD_TABLE_AF;
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pudval |= (mm == &init_mm) ? PUD_TABLE_UXN : PUD_TABLE_PXN;
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__pud_populate(pudp, __pa(pmdp), pudval);
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}
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#else
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static inline void __pud_populate(pud_t *pudp, phys_addr_t pmdp, pudval_t prot)
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{
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BUILD_BUG();
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}
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#endif /* CONFIG_PGTABLE_LEVELS > 2 */
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#if CONFIG_PGTABLE_LEVELS > 3
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static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
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{
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if (pgtable_l4_enabled())
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set_p4d(p4dp, __p4d(__phys_to_p4d_val(pudp) | prot));
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}
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static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4dp, pud_t *pudp)
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{
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p4dval_t p4dval = P4D_TYPE_TABLE | P4D_TABLE_AF;
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p4dval |= (mm == &init_mm) ? P4D_TABLE_UXN : P4D_TABLE_PXN;
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__p4d_populate(p4dp, __pa(pudp), p4dval);
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}
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static inline void pud_free(struct mm_struct *mm, pud_t *pud)
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{
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if (!pgtable_l4_enabled())
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return;
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__pud_free(mm, pud);
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}
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#else
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static inline void __p4d_populate(p4d_t *p4dp, phys_addr_t pudp, p4dval_t prot)
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{
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BUILD_BUG();
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}
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#endif /* CONFIG_PGTABLE_LEVELS > 3 */
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#if CONFIG_PGTABLE_LEVELS > 4
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static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot)
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{
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if (pgtable_l5_enabled())
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set_pgd(pgdp, __pgd(__phys_to_pgd_val(p4dp) | prot));
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}
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static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgdp, p4d_t *p4dp)
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{
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pgdval_t pgdval = PGD_TYPE_TABLE | PGD_TABLE_AF;
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pgdval |= (mm == &init_mm) ? PGD_TABLE_UXN : PGD_TABLE_PXN;
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__pgd_populate(pgdp, __pa(p4dp), pgdval);
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}
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#else
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static inline void __pgd_populate(pgd_t *pgdp, phys_addr_t p4dp, pgdval_t prot)
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{
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BUILD_BUG();
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}
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#endif /* CONFIG_PGTABLE_LEVELS > 4 */
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extern pgd_t *pgd_alloc(struct mm_struct *mm);
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extern void pgd_free(struct mm_struct *mm, pgd_t *pgdp);
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static inline void __pmd_populate(pmd_t *pmdp, phys_addr_t ptep,
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pmdval_t prot)
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{
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set_pmd(pmdp, __pmd(__phys_to_pmd_val(ptep) | prot));
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}
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/*
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* Populate the pmdp entry with a pointer to the pte. This pmd is part
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* of the mm address space.
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*/
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static inline void
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pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
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{
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VM_BUG_ON(mm && mm != &init_mm);
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__pmd_populate(pmdp, __pa(ptep),
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PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_UXN);
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}
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
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{
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VM_BUG_ON(mm == &init_mm);
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__pmd_populate(pmdp, page_to_phys(ptep),
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PMD_TYPE_TABLE | PMD_TABLE_AF | PMD_TABLE_PXN);
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}
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#endif
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