powerpc: Optimize hugepage invalidate

Hugepage invalidate involves invalidating multiple hpte entries.
Optimize the operation using H_BULK_REMOVE on lpar platforms.
On native, reduce the number of tlb flush.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index 801e3c61395f..8b480901165a 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -57,6 +57,9 @@ struct machdep_calls {
         void            (*hpte_removebolted)(unsigned long ea,
                                              int psize, int ssize);
         void            (*flush_hash_range)(unsigned long number, int local);
+        void            (*hugepage_invalidate)(struct mm_struct *mm,
+                                               unsigned char *hpte_slot_array,
+                                               unsigned long addr, int psize);
 
         /* special for kexec, to be called in real mode, linear mapping is
          * destroyed as well */