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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-04-01 16:41:47 +0200 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-10 23:46:02 +0200 |
commit | f6b0df55cad252fedd60aa2ba75a0207d0006283 (patch) | |
tree | 912304fc0d937c29e2a431b6cdc2a42211fcd97d /arch/powerpc/mm/tlb-radix.c | |
parent | powerpc/powernv: Add OPAL exports attributes to sysfs (diff) | |
download | linux-f6b0df55cad252fedd60aa2ba75a0207d0006283.tar.xz linux-f6b0df55cad252fedd60aa2ba75a0207d0006283.zip |
powerpc/mm/radix: Don't do page walk cache flush when doing full mm flush
For fullmm tlb flush, we do a flush with RIC_FLUSH_ALL which will invalidate all
related caches (radix__tlb_flush()). Hence the pwc flush is not needed.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/tlb-radix.c')
-rw-r--r-- | arch/powerpc/mm/tlb-radix.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c index 83dc1ccc2fa1..f3e58bd60d1a 100644 --- a/arch/powerpc/mm/tlb-radix.c +++ b/arch/powerpc/mm/tlb-radix.c @@ -129,6 +129,12 @@ void radix__local_flush_tlb_pwc(struct mmu_gather *tlb, unsigned long addr) { unsigned long pid; struct mm_struct *mm = tlb->mm; + /* + * If we are doing a full mm flush, we will do a tlb flush + * with RIC_FLUSH_ALL later. + */ + if (tlb->fullmm) + return; preempt_disable(); @@ -195,6 +201,12 @@ void radix__flush_tlb_pwc(struct mmu_gather *tlb, unsigned long addr) unsigned long pid; struct mm_struct *mm = tlb->mm; + /* + * If we are doing a full mm flush, we will do a tlb flush + * with RIC_FLUSH_ALL later. + */ + if (tlb->fullmm) + return; preempt_disable(); pid = mm->context.id; |