From 5f307be18b32aeff7bbad540c0d3897ecedbeb56 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 4 Sep 2018 13:18:15 +0200 Subject: asm-generic/tlb, arch: Provide generic tlb_flush() based on flush_tlb_range() Provide a generic tlb_flush() implementation that relies on flush_tlb_range(). This is a little awkward because flush_tlb_range() assumes a VMA for range invalidation, but we no longer have one. Audit of all flush_tlb_range() implementations shows only vma->vm_mm and vma->vm_flags are used, and of the latter only VM_EXEC (I-TLB invalidates) and VM_HUGETLB (large TLB invalidate) are used. Therefore, track VM_EXEC and VM_HUGETLB in two more bits, and create a 'fake' VMA. This allows architectures that have a reasonably efficient flush_tlb_range() to not require any additional effort. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Will Deacon Cc: Andrew Morton Cc: Andy Lutomirski Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Dave Hansen Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Nick Piggin Cc: Peter Zijlstra Cc: Rik van Riel Cc: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/arm64/include/asm/tlb.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm64/include') diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h index 106fdc951b6e..37603b5616a5 100644 --- a/arch/arm64/include/asm/tlb.h +++ b/arch/arm64/include/asm/tlb.h @@ -27,6 +27,7 @@ static inline void __tlb_remove_table(void *_table) free_page_and_swap_cache((struct page *)_table); } +#define tlb_flush tlb_flush static void tlb_flush(struct mmu_gather *tlb); #include -- cgit v1.2.3-58-ga151