arch/x86/include/asm/tlb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_TLB_H
   3 #define _ASM_X86_TLB_H
   4
   5 #define tlb_start_vma(tlb, vma) do { } while (0)
   6 #define tlb_end_vma(tlb, vma) do { } while (0)
   7 #define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
   8
   9 #define tlb_flush(tlb)                                                  \
  10 {                                                                       \
  11         if (!tlb->fullmm && !tlb->need_flush_all)                       \
  12                 flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end, 0UL); \
  13         else                                                            \
  14                 flush_tlb_mm_range(tlb->mm, 0UL, TLB_FLUSH_ALL, 0UL);   \
  15 }
  16
  17 #include <asm-generic/tlb.h>
  18
  19 /*
  20  * While x86 architecture in general requires an IPI to perform TLB
  21  * shootdown, enablement code for several hypervisors overrides
  22  * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing
  23  * a hypercall. To keep software pagetable walkers safe in this case we
  24  * switch to RCU based table free (HAVE_RCU_TABLE_FREE). See the comment
  25  * below 'ifdef CONFIG_HAVE_RCU_TABLE_FREE' in include/asm-generic/tlb.h
  26  * for more details.
  27  */
  28 static inline void __tlb_remove_table(void *table)
  29 {
  30         free_page_and_swap_cache(table);
  31 }
  32
  33 #endif /* _ASM_X86_TLB_H */