arch/powerpc/include/asm/book3s/64/tlbflush-hash.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
   3 #define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
   4
   5 /*
   6  * TLB flushing for 64-bit hash-MMU CPUs
   7  */
   8
   9 #include <linux/percpu.h>
  10 #include <asm/page.h>
  11
  12 #define PPC64_TLB_BATCH_NR 192
  13
  14 struct ppc64_tlb_batch {
  15         int                     active;
  16         unsigned long           index;
  17         struct mm_struct        *mm;
  18         real_pte_t              pte[PPC64_TLB_BATCH_NR];
  19         unsigned long           vpn[PPC64_TLB_BATCH_NR];
  20         unsigned int            psize;
  21         int                     ssize;
  22 };
  23 DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
  24
  25 extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
  26
  27 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
  28
  29 static inline void arch_enter_lazy_mmu_mode(void)
  30 {
  31         struct ppc64_tlb_batch *batch;
  32
  33         if (radix_enabled())
  34                 return;
  35         batch = this_cpu_ptr(&ppc64_tlb_batch);
  36         batch->active = 1;
  37 }
  38
  39 static inline void arch_leave_lazy_mmu_mode(void)
  40 {
  41         struct ppc64_tlb_batch *batch;
  42
  43         if (radix_enabled())
  44                 return;
  45         batch = this_cpu_ptr(&ppc64_tlb_batch);
  46
  47         if (batch->index)
  48                 __flush_tlb_pending(batch);
  49         batch->active = 0;
  50 }
  51
  52 #define arch_flush_lazy_mmu_mode()      do {} while (0)
  53
  54 extern void hash__tlbiel_all(unsigned int action);
  55
  56 extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
  57                             int ssize, unsigned long flags);
  58 extern void flush_hash_range(unsigned long number, int local);
  59 extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
  60                                 pmd_t *pmdp, unsigned int psize, int ssize,
  61                                 unsigned long flags);
  62 static inline void hash__local_flush_tlb_mm(struct mm_struct *mm)
  63 {
  64 }
  65
  66 static inline void hash__flush_tlb_mm(struct mm_struct *mm)
  67 {
  68 }
  69
  70 static inline void hash__local_flush_all_mm(struct mm_struct *mm)
  71 {
  72         /*
  73          * There's no Page Walk Cache for hash, so what is needed is
  74          * the same as flush_tlb_mm(), which doesn't really make sense
  75          * with hash. So the only thing we could do is flush the
  76          * entire LPID! Punt for now, as it's not being used.
  77          */
  78         WARN_ON_ONCE(1);
  79 }
  80
  81 static inline void hash__flush_all_mm(struct mm_struct *mm)
  82 {
  83         /*
  84          * There's no Page Walk Cache for hash, so what is needed is
  85          * the same as flush_tlb_mm(), which doesn't really make sense
  86          * with hash. So the only thing we could do is flush the
  87          * entire LPID! Punt for now, as it's not being used.
  88          */
  89         WARN_ON_ONCE(1);
  90 }
  91
  92 static inline void hash__local_flush_tlb_page(struct vm_area_struct *vma,
  93                                           unsigned long vmaddr)
  94 {
  95 }
  96
  97 static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
  98                                     unsigned long vmaddr)
  99 {
 100 }
 101
 102 static inline void hash__flush_tlb_range(struct vm_area_struct *vma,
 103                                      unsigned long start, unsigned long end)
 104 {
 105 }
 106
 107 static inline void hash__flush_tlb_kernel_range(unsigned long start,
 108                                             unsigned long end)
 109 {
 110 }
 111
 112
 113 struct mmu_gather;
 114 extern void hash__tlb_flush(struct mmu_gather *tlb);
 115 /* Private function for use by PCI IO mapping code */
 116 extern void __flush_hash_table_range(struct mm_struct *mm, unsigned long start,
 117                                      unsigned long end);
 118 extern void flush_tlb_pmd_range(struct mm_struct *mm, pmd_t *pmd,
 119                                 unsigned long addr);
 120 #endif /*  _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */