root/arch/powerpc/include/asm/tlb.h

INCLUDED FROM

DEFINITIONS

1. __tlb_remove_tlb_entry
2. mm_is_core_local
3. mm_is_thread_local
4. mm_reset_thread_local
5. mm_is_thread_local
6. mm_is_core_local
7. mm_is_thread_local

   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 <asm/pgtable.h>
  14 #endif
  15 #include <asm/pgalloc.h>
  16 #ifndef __powerpc64__
  17 #include <asm/page.h>
  18 #include <asm/mmu.h>
  19 #endif
  20 
  21 #include <linux/pagemap.h>
  22 
  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
  26 
  27 #define tlb_flush tlb_flush
  28 extern void tlb_flush(struct mmu_gather *tlb);
  29 /*
  30  * book3s:
  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.
  34  *
  35  * nohash:
  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.
  38  */
  39 #define tlb_needs_table_invalidate()    radix_enabled()
  40 
  41 /* Get the generic bits... */
  42 #include <asm-generic/tlb.h>
  43 
  44 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
  45                              unsigned long address);
  46 
  47 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
  48                                           unsigned long address)
  49 {
  50 #ifdef CONFIG_PPC_BOOK3S_32
  51         if (pte_val(*ptep) & _PAGE_HASHPTE)
  52                 flush_hash_entry(tlb->mm, ptep, address);
  53 #endif
  54 }
  55 
  56 #ifdef CONFIG_SMP
  57 static inline int mm_is_core_local(struct mm_struct *mm)
  58 {
  59         return cpumask_subset(mm_cpumask(mm),
  60                               topology_sibling_cpumask(smp_processor_id()));
  61 }
  62 
  63 #ifdef CONFIG_PPC_BOOK3S_64
  64 static inline int mm_is_thread_local(struct mm_struct *mm)
  65 {
  66         if (atomic_read(&mm->context.active_cpus) > 1)
  67                 return false;
  68         return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
  69 }
  70 static inline void mm_reset_thread_local(struct mm_struct *mm)
  71 {
  72         WARN_ON(atomic_read(&mm->context.copros) > 0);
  73         /*
  74          * It's possible for mm_access to take a reference on mm_users to
  75          * access the remote mm from another thread, but it's not allowed
  76          * to set mm_cpumask, so mm_users may be > 1 here.
  77          */
  78         WARN_ON(current->mm != mm);
  79         atomic_set(&mm->context.active_cpus, 1);
  80         cpumask_clear(mm_cpumask(mm));
  81         cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
  82 }
  83 #else /* CONFIG_PPC_BOOK3S_64 */
  84 static inline int mm_is_thread_local(struct mm_struct *mm)
  85 {
  86         return cpumask_equal(mm_cpumask(mm),
  87                               cpumask_of(smp_processor_id()));
  88 }
  89 #endif /* !CONFIG_PPC_BOOK3S_64 */
  90 
  91 #else /* CONFIG_SMP */
  92 static inline int mm_is_core_local(struct mm_struct *mm)
  93 {
  94         return 1;
  95 }
  96 
  97 static inline int mm_is_thread_local(struct mm_struct *mm)
  98 {
  99         return 1;
 100 }
 101 #endif
 102 
 103 #endif /* __KERNEL__ */
 104 #endif /* __ASM_POWERPC_TLB_H */