arch/riscv/include/asm/tlbflush.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
   4  * Copyright (C) 2012 Regents of the University of California
   5  */
   6
   7 #ifndef _ASM_RISCV_TLBFLUSH_H
   8 #define _ASM_RISCV_TLBFLUSH_H
   9
  10 #include <linux/mm_types.h>
  11 #include <asm/smp.h>
  12 #include <asm/errata_list.h>
  13
  14 #define FLUSH_TLB_MAX_SIZE      ((unsigned long)-1)
  15 #define FLUSH_TLB_NO_ASID       ((unsigned long)-1)
  16
  17 #ifdef CONFIG_MMU
  18 static inline void local_flush_tlb_all(void)
  19 {
  20         __asm__ __volatile__ ("sfence.vma" : : : "memory");
  21 }
  22
  23 static inline void local_flush_tlb_all_asid(unsigned long asid)
  24 {
  25         if (asid != FLUSH_TLB_NO_ASID)
  26                 ALT_SFENCE_VMA_ASID(asid);
  27         else
  28                 local_flush_tlb_all();
  29 }
  30
  31 /* Flush one page from local TLB */
  32 static inline void local_flush_tlb_page(unsigned long addr)
  33 {
  34         ALT_SFENCE_VMA_ADDR(addr);
  35 }
  36
  37 static inline void local_flush_tlb_page_asid(unsigned long addr,
  38                                              unsigned long asid)
  39 {
  40         if (asid != FLUSH_TLB_NO_ASID)
  41                 ALT_SFENCE_VMA_ADDR_ASID(addr, asid);
  42         else
  43                 local_flush_tlb_page(addr);
  44 }
  45
  46 void flush_tlb_all(void);
  47 void flush_tlb_mm(struct mm_struct *mm);
  48 void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
  49                         unsigned long end, unsigned int page_size);
  50 void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr);
  51 void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
  52                      unsigned long end);
  53 void flush_tlb_kernel_range(unsigned long start, unsigned long end);
  54 void local_flush_tlb_kernel_range(unsigned long start, unsigned long end);
  55 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
  56 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
  57 void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
  58                         unsigned long end);
  59 #endif
  60
  61 bool arch_tlbbatch_should_defer(struct mm_struct *mm);
  62 void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch,
  63                                struct mm_struct *mm,
  64                                unsigned long uaddr);
  65 void arch_flush_tlb_batched_pending(struct mm_struct *mm);
  66 void arch_tlbbatch_flush(struct arch_tlbflush_unmap_batch *batch);
  67
  68 extern unsigned long tlb_flush_all_threshold;
  69 #else /* CONFIG_MMU */
  70 #define local_flush_tlb_all()                   do { } while (0)
  71 #endif /* CONFIG_MMU */
  72
  73 #endif /* _ASM_RISCV_TLBFLUSH_H */