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ad1ac8d94c
Add sparc-specific pte_free_defer(), to call pte_free() via call_rcu(). pte_free_defer() will be called inside khugepaged's retract_page_tables() loop, where allocating extra memory cannot be relied upon. This precedes the generic version to avoid build breakage from incompatible pgtable_t. sparc32 supports pagetables sharing a page, but does not support THP; sparc64 supports THP, but does not support pagetables sharing a page. So the sparc-specific pte_free_defer() is as simple as the generic one, except for converting between pte_t *pgtable_t and struct page *. Link: https://lkml.kernel.org/r/dc4f318d-a66a-5622-dc44-9018ea814b37@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Christoph Hellwig <hch@infradead.org> Cc: Claudio Imbrenda <imbrenda@linux.ibm.com> Cc: David Hildenbrand <david@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Huang, Ying <ying.huang@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jann Horn <jannh@google.com> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Lorenzo Stoakes <lstoakes@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: Pavel Tatashin <pasha.tatashin@soleen.com> Cc: Peter Xu <peterx@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qi Zheng <zhengqi.arch@bytedance.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Cc: Russell King <linux@armlinux.org.uk> Cc: SeongJae Park <sj@kernel.org> Cc: Song Liu <song@kernel.org> Cc: Steven Price <steven.price@arm.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Cc: Yang Shi <shy828301@gmail.com> Cc: Yu Zhao <yuzhao@google.com> Cc: Zack Rusin <zackr@vmware.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _SPARC64_PGALLOC_H
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#define _SPARC64_PGALLOC_H
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <asm/spitfire.h>
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#include <asm/cpudata.h>
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#include <asm/cacheflush.h>
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#include <asm/page.h>
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/* Page table allocation/freeing. */
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extern struct kmem_cache *pgtable_cache;
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static inline void __p4d_populate(p4d_t *p4d, pud_t *pud)
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{
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p4d_set(p4d, pud);
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}
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#define p4d_populate(MM, P4D, PUD) __p4d_populate(P4D, PUD)
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
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}
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static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
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{
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kmem_cache_free(pgtable_cache, pgd);
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}
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static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
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{
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pud_set(pud, pmd);
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}
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#define pud_populate(MM, PUD, PMD) __pud_populate(PUD, PMD)
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
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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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kmem_cache_free(pgtable_cache, pud);
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}
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
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{
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return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
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}
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static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
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{
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kmem_cache_free(pgtable_cache, pmd);
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}
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pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
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pgtable_t pte_alloc_one(struct mm_struct *mm);
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void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
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void pte_free(struct mm_struct *mm, pgtable_t ptepage);
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/* arch use pte_free_defer() implementation in arch/sparc/mm/init_64.c */
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#define pte_free_defer pte_free_defer
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void pte_free_defer(struct mm_struct *mm, pgtable_t pgtable);
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#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
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#define pmd_populate(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
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void pgtable_free(void *table, bool is_page);
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#ifdef CONFIG_SMP
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struct mmu_gather;
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void tlb_remove_table(struct mmu_gather *, void *);
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
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{
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unsigned long pgf = (unsigned long)table;
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if (is_page)
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pgf |= 0x1UL;
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tlb_remove_table(tlb, (void *)pgf);
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}
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static inline void __tlb_remove_table(void *_table)
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{
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void *table = (void *)((unsigned long)_table & ~0x1UL);
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bool is_page = false;
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if ((unsigned long)_table & 0x1UL)
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is_page = true;
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pgtable_free(table, is_page);
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}
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#else /* CONFIG_SMP */
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
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{
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pgtable_free(table, is_page);
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}
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#endif /* !CONFIG_SMP */
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static inline void __pte_free_tlb(struct mmu_gather *tlb, pte_t *pte,
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unsigned long address)
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{
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pgtable_free_tlb(tlb, pte, true);
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}
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#define __pmd_free_tlb(tlb, pmd, addr) \
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pgtable_free_tlb(tlb, pmd, false)
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#define __pud_free_tlb(tlb, pud, addr) \
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pgtable_free_tlb(tlb, pud, false)
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#endif /* _SPARC64_PGALLOC_H */
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