From 2f4ecf68a048de44d72157d637bf9cbbbdb357b0 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 10 Sep 2019 15:38:10 -0700 Subject: [PATCH] ARC: mm: tlb flush optim: elide redundant uTLB invalidates for MMUv3 For MMUv3 (and prior) the flush_tlb_{range,mm,page} API use the MMU TLBWrite cmd which already nukes the entire uTLB, so NO need for additional IVUTLB cmd from utlb_invalidate() - hence this patch local_flush_tlb_all() is special since it uses a weaker TLBWriteNI cmd (prec commit) to shoot down JTLB, hence we retain the explicit uTLB flush Signed-off-by: Vineet Gupta --- arch/arc/mm/tlb.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/arc/mm/tlb.c b/arch/arc/mm/tlb.c index 210d807983dd..c340acd989a0 100644 --- a/arch/arc/mm/tlb.c +++ b/arch/arc/mm/tlb.c @@ -339,8 +339,6 @@ void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start, } } - utlb_invalidate(); - local_irq_restore(flags); } @@ -369,8 +367,6 @@ void local_flush_tlb_kernel_range(unsigned long start, unsigned long end) start += PAGE_SIZE; } - utlb_invalidate(); - local_irq_restore(flags); } @@ -391,7 +387,6 @@ void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page) if (asid_mm(vma->vm_mm, cpu) != MM_CTXT_NO_ASID) { tlb_entry_erase((page & PAGE_MASK) | hw_pid(vma->vm_mm, cpu)); - utlb_invalidate(); } local_irq_restore(flags); -- 2.30.2