Now that we track page size in mmu_gather, we can use address based
tlbie format when doing a tlb_flush(). We don't do this if we are
invalidating the full address space.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/tlb-radix.c | 28 +++++++++++++++++++++++++++-
1 file changed, 27 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index 6f06b0b04d71..e581a521a87e 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -261,11 +261,37 @@ void radix__flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
}
EXPORT_SYMBOL(radix__flush_tlb_range);
+static int radix_get_mmu_psize(int page_size)
+{
+ int psize;
+
+ if (page_size == (1UL << mmu_psize_defs[mmu_virtual_psize].shift))
+ psize = mmu_virtual_psize;
+ else if (page_size == (1UL << mmu_psize_defs[MMU_PAGE_2M].shift))
+ psize = MMU_PAGE_2M;
+ else if (page_size == (1UL << mmu_psize_defs[MMU_PAGE_1G].shift))
+ psize = MMU_PAGE_1G;
+ else
+ return -1;
+ return psize;
+}
void radix__tlb_flush(struct mmu_gather *tlb)
{
+ int psize = 0;
struct mm_struct *mm = tlb->mm;
- radix__flush_tlb_mm(mm);
+ int page_size = tlb->page_size;
+
+ psize = radix_get_mmu_psize(page_size);
+ if (psize == -1)
+ /* unknown page size */
+ goto flush_mm;
+
+ if (!tlb->fullmm && !tlb->need_flush_all)
+ radix__flush_tlb_range_psize(mm, tlb->start, tlb->end, psize);
+ else
+flush_mm:
+ radix__flush_tlb_mm(mm);
}
/*
* flush the page walk cache for the address
--
2.7.4
--
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