arch/powerpc/include/asm/tlb.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *      TLB shootdown specifics for powerpc
   4  *
   5  * Copyright (C) 2002 Anton Blanchard, IBM Corp.
   6  * Copyright (C) 2002 Paul Mackerras, IBM Corp.
   7  */
   8 #ifndef _ASM_POWERPC_TLB_H
   9 #define _ASM_POWERPC_TLB_H
  10 #ifdef __KERNEL__
  11
  12 #ifndef __powerpc64__
  13 #include <linux/pgtable.h>
  14 #endif
  15 #ifndef __powerpc64__
  16 #include <asm/page.h>
  17 #include <asm/mmu.h>
  18 #endif
  19
  20 #include <linux/pagemap.h>
  21
  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
  25
  26 #define tlb_flush tlb_flush
  27 extern void tlb_flush(struct mmu_gather *tlb);
  28 /*
  29  * book3s:
  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.
  33  *
  34  * nohash:
  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.
  37  */
  38 #define tlb_needs_table_invalidate()    radix_enabled()
  39
  40 /* Get the generic bits... */
  41 #include <asm-generic/tlb.h>
  42
  43 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
  44                                           unsigned long address)
  45 {
  46 #ifdef CONFIG_PPC_BOOK3S_32
  47         if (pte_val(*ptep) & _PAGE_HASHPTE)
  48                 flush_hash_entry(tlb->mm, ptep, address);
  49 #endif
  50 }
  51
  52 #ifdef CONFIG_SMP
  53 static inline int mm_is_core_local(struct mm_struct *mm)
  54 {
  55         return cpumask_subset(mm_cpumask(mm),
  56                               topology_sibling_cpumask(smp_processor_id()));
  57 }
  58
  59 #ifdef CONFIG_PPC_BOOK3S_64
  60 static inline int mm_is_thread_local(struct mm_struct *mm)
  61 {
  62         if (atomic_read(&mm->context.active_cpus) > 1)
  63                 return false;
  64         return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
  65 }
  66 #else /* CONFIG_PPC_BOOK3S_64 */
  67 static inline int mm_is_thread_local(struct mm_struct *mm)
  68 {
  69         return cpumask_equal(mm_cpumask(mm),
  70                               cpumask_of(smp_processor_id()));
  71 }
  72 #endif /* !CONFIG_PPC_BOOK3S_64 */
  73
  74 #else /* CONFIG_SMP */
  75 static inline int mm_is_core_local(struct mm_struct *mm)
  76 {
  77         return 1;
  78 }
  79
  80 static inline int mm_is_thread_local(struct mm_struct *mm)
  81 {
  82         return 1;
  83 }
  84 #endif
  85
  86 #endif /* __KERNEL__ */
  87 #endif /* __ASM_POWERPC_TLB_H */