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 <asm/pgtable.h>
15 #include <asm/pgalloc.h>
21 #include <linux/pagemap.h>
23 #define tlb_start_vma(tlb, vma) do { } while (0)
24 #define tlb_end_vma(tlb, vma) do { } while (0)
25 #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
27 #define tlb_flush tlb_flush
28 extern void tlb_flush(struct mmu_gather *tlb);
31 * Hash does not use the linux page-tables, so we can avoid
32 * the TLB invalidate for page-table freeing, Radix otoh does use the
33 * page-tables and needs the TLBI.
36 * We still do TLB invalidate in the __pte_free_tlb routine before we
37 * add the page table pages to mmu gather table batch.
39 #define tlb_needs_table_invalidate() radix_enabled()
41 /* Get the generic bits... */
42 #include <asm-generic/tlb.h>
44 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
45 unsigned long address);
47 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
48 unsigned long address)
50 #ifdef CONFIG_PPC_BOOK3S_32
51 if (pte_val(*ptep) & _PAGE_HASHPTE)
52 flush_hash_entry(tlb->mm, ptep, address);
57 static inline int mm_is_core_local(struct mm_struct *mm)
59 return cpumask_subset(mm_cpumask(mm),
60 topology_sibling_cpumask(smp_processor_id()));
63 #ifdef CONFIG_PPC_BOOK3S_64
64 static inline int mm_is_thread_local(struct mm_struct *mm)
66 if (atomic_read(&mm->context.active_cpus) > 1)
68 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
70 #else /* CONFIG_PPC_BOOK3S_64 */
71 static inline int mm_is_thread_local(struct mm_struct *mm)
73 return cpumask_equal(mm_cpumask(mm),
74 cpumask_of(smp_processor_id()));
76 #endif /* !CONFIG_PPC_BOOK3S_64 */
78 #else /* CONFIG_SMP */
79 static inline int mm_is_core_local(struct mm_struct *mm)
84 static inline int mm_is_thread_local(struct mm_struct *mm)
90 #endif /* __KERNEL__ */
91 #endif /* __ASM_POWERPC_TLB_H */