105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* TLB shootdown specifics for powerpc
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*
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* Copyright (C) 2002 Anton Blanchard, IBM Corp.
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* Copyright (C) 2002 Paul Mackerras, IBM Corp.
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*/
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#ifndef _ASM_POWERPC_TLB_H
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#define _ASM_POWERPC_TLB_H
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#ifdef __KERNEL__
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#ifndef __powerpc64__
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#include <asm/pgtable.h>
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#endif
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#include <asm/pgalloc.h>
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#ifndef __powerpc64__
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#include <asm/page.h>
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#include <asm/mmu.h>
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#endif
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#include <linux/pagemap.h>
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#define tlb_start_vma(tlb, vma) do { } while (0)
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#define tlb_end_vma(tlb, vma) do { } while (0)
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#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
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#define tlb_flush tlb_flush
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extern void tlb_flush(struct mmu_gather *tlb);
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/*
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* book3s:
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* Hash does not use the linux page-tables, so we can avoid
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* the TLB invalidate for page-table freeing, Radix otoh does use the
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* page-tables and needs the TLBI.
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*
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* nohash:
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* We still do TLB invalidate in the __pte_free_tlb routine before we
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* add the page table pages to mmu gather table batch.
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*/
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#define tlb_needs_table_invalidate() radix_enabled()
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/* Get the generic bits... */
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#include <asm-generic/tlb.h>
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extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
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unsigned long address);
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static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
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unsigned long address)
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{
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#ifdef CONFIG_PPC_BOOK3S_32
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if (pte_val(*ptep) & _PAGE_HASHPTE)
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flush_hash_entry(tlb->mm, ptep, address);
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#endif
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}
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#ifdef CONFIG_SMP
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static inline int mm_is_core_local(struct mm_struct *mm)
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{
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return cpumask_subset(mm_cpumask(mm),
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topology_sibling_cpumask(smp_processor_id()));
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}
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#ifdef CONFIG_PPC_BOOK3S_64
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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if (atomic_read(&mm->context.active_cpus) > 1)
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return false;
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return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
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}
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static inline void mm_reset_thread_local(struct mm_struct *mm)
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{
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WARN_ON(atomic_read(&mm->context.copros) > 0);
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/*
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* It's possible for mm_access to take a reference on mm_users to
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* access the remote mm from another thread, but it's not allowed
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* to set mm_cpumask, so mm_users may be > 1 here.
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*/
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WARN_ON(current->mm != mm);
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atomic_set(&mm->context.active_cpus, 1);
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cpumask_clear(mm_cpumask(mm));
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cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
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}
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#else /* CONFIG_PPC_BOOK3S_64 */
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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return cpumask_equal(mm_cpumask(mm),
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cpumask_of(smp_processor_id()));
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}
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#endif /* !CONFIG_PPC_BOOK3S_64 */
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#else /* CONFIG_SMP */
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static inline int mm_is_core_local(struct mm_struct *mm)
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{
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return 1;
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}
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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return 1;
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}
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_TLB_H */
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