1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * TLB shootdown specifics for powerpc
5 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
6 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
8 #ifndef _ASM_POWERPC_TLB_H
9 #define _ASM_POWERPC_TLB_H
13 #include <linux/pgtable.h>
20 #include <linux/pagemap.h>
22 #define tlb_start_vma(tlb, vma) do { } while (0)
23 #define tlb_end_vma(tlb, vma) do { } while (0)
24 #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
26 #define tlb_flush tlb_flush
27 extern void tlb_flush(struct mmu_gather *tlb);
30 * Hash does not use the linux page-tables, so we can avoid
31 * the TLB invalidate for page-table freeing, Radix otoh does use the
32 * page-tables and needs the TLBI.
35 * We still do TLB invalidate in the __pte_free_tlb routine before we
36 * add the page table pages to mmu gather table batch.
38 #define tlb_needs_table_invalidate() radix_enabled()
40 /* Get the generic bits... */
41 #include <asm-generic/tlb.h>
43 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
44 unsigned long address);
46 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
47 unsigned long address)
49 #ifdef CONFIG_PPC_BOOK3S_32
50 if (pte_val(*ptep) & _PAGE_HASHPTE)
51 flush_hash_entry(tlb->mm, ptep, address);
56 static inline int mm_is_core_local(struct mm_struct *mm)
58 return cpumask_subset(mm_cpumask(mm),
59 topology_sibling_cpumask(smp_processor_id()));
62 #ifdef CONFIG_PPC_BOOK3S_64
63 static inline int mm_is_thread_local(struct mm_struct *mm)
65 if (atomic_read(&mm->context.active_cpus) > 1)
67 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
69 static inline void mm_reset_thread_local(struct mm_struct *mm)
71 WARN_ON(atomic_read(&mm->context.copros) > 0);
73 * It's possible for mm_access to take a reference on mm_users to
74 * access the remote mm from another thread, but it's not allowed
75 * to set mm_cpumask, so mm_users may be > 1 here.
77 WARN_ON(current->mm != mm);
78 atomic_set(&mm->context.active_cpus, 1);
79 cpumask_clear(mm_cpumask(mm));
80 cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
82 #else /* CONFIG_PPC_BOOK3S_64 */
83 static inline int mm_is_thread_local(struct mm_struct *mm)
85 return cpumask_equal(mm_cpumask(mm),
86 cpumask_of(smp_processor_id()));
88 #endif /* !CONFIG_PPC_BOOK3S_64 */
90 #else /* CONFIG_SMP */
91 static inline int mm_is_core_local(struct mm_struct *mm)
96 static inline int mm_is_thread_local(struct mm_struct *mm)
102 #endif /* __KERNEL__ */
103 #endif /* __ASM_POWERPC_TLB_H */