[SPARC64]: Add a secondary TSB for hugepage mappings.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 2 deletions

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index c2b556106fc1..16d231703d6a 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -283,6 +283,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t p
         struct mm_struct *mm;
         struct tsb *tsb;
         unsigned long tag, flags;
+        unsigned long tsb_index, tsb_hash_shift;
 
         if (tlb_type != hypervisor) {
                 unsigned long pfn = pte_pfn(pte);
@@ -312,10 +313,26 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t p
 
         mm = vma->vm_mm;
 
+        tsb_index = MM_TSB_BASE;
+        tsb_hash_shift = PAGE_SHIFT;
+
         spin_lock_irqsave(&mm->context.lock, flags);
 
-        tsb = &mm->context.tsb[(address >> PAGE_SHIFT) &
-                               (mm->context.tsb_nentries - 1UL)];
+#ifdef CONFIG_HUGETLB_PAGE
+        if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) {
+                if ((tlb_type == hypervisor &&
+                     (pte_val(pte) & _PAGE_SZALL_4V) == _PAGE_SZHUGE_4V) ||
+                    (tlb_type != hypervisor &&
+                     (pte_val(pte) & _PAGE_SZALL_4U) == _PAGE_SZHUGE_4U)) {
+                        tsb_index = MM_TSB_HUGE;
+                        tsb_hash_shift = HPAGE_SHIFT;
+                }
+        }
+#endif
+
+        tsb = mm->context.tsb_block[tsb_index].tsb;
+        tsb += ((address >> tsb_hash_shift) &
+                (mm->context.tsb_block[tsb_index].tsb_nentries - 1UL));
         tag = (address >> 22UL);
         tsb_insert(tsb, tag, pte_val(pte));