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authorVineet Gupta <vgupta@synopsys.com>2019-09-11 01:38:10 +0300
committerVineet Gupta <vgupta@synopsys.com>2019-10-28 22:12:32 +0300
commit2f4ecf68a048de44d72157d637bf9cbbbdb357b0 (patch)
tree3fa9f88b2560cbee732dd41933d2afc33114c0a1
parent1355ea2e603d76af6b1381873e37b1aec22a18a0 (diff)
downloadlinux-2f4ecf68a048de44d72157d637bf9cbbbdb357b0.tar.xz
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 <vgupta@synopsys.com>
-rw-r--r--arch/arc/mm/tlb.c5
1 files changed, 0 insertions, 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);