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_flush 10 static inline void tlb_flush(struct mmu_gather *tlb); 11 12 #include <asm-generic/tlb.h> 13 14 static inline void tlb_flush(struct mmu_gather *tlb) 15 { 16 unsigned long start = 0UL, end = TLB_FLUSH_ALL; 17 unsigned int stride_shift = tlb_get_unmap_shift(tlb); 18 19 if (!tlb->fullmm && !tlb->need_flush_all) { 20 start = tlb->start; 21 end = tlb->end; 22 } 23 24 flush_tlb_mm_range(tlb->mm, start, end, stride_shift, tlb->freed_tables); 25 } 26 27 /* 28 * While x86 architecture in general requires an IPI to perform TLB 29 * shootdown, enablement code for several hypervisors overrides 30 * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing 31 * a hypercall. To keep software pagetable walkers safe in this case we 32 * switch to RCU based table free (MMU_GATHER_RCU_TABLE_FREE). See the comment 33 * below 'ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE' in include/asm-generic/tlb.h 34 * for more details. 35 */ 36 static inline void __tlb_remove_table(void *table) 37 { 38 free_page_and_swap_cache(table); 39 } 40 41 #endif /* _ASM_X86_TLB_H */ 42