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author | 2019-09-10 15:38:10 -0700 | |
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committer | 2019-10-28 12:12:32 -0700 | |
commit | 2f4ecf68a048de44d72157d637bf9cbbbdb357b0 (patch) | |
tree | 3fa9f88b2560cbee732dd41933d2afc33114c0a1 /arch/arc/mm | |
parent | ARC: mm: tlb flush optim: elide repeated uTLB invalidate in loop (diff) | |
download | linux-2f4ecf68a048de44d72157d637bf9cbbbdb357b0.tar.gz linux-2f4ecf68a048de44d72157d637bf9cbbbdb357b0.tar.bz2 linux-2f4ecf68a048de44d72157d637bf9cbbbdb357b0.zip |
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>
Diffstat (limited to 'arch/arc/mm')
-rw-r--r-- | arch/arc/mm/tlb.c | 5 |
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); |