3 files changed, 6 insertions, 1 deletions

diff --git a/arch/powerpc/mm/hash_low_64.S b/arch/powerpc/mm/hash_low_64.S
index e0d02c4a2615..106fba391987 100644
--- a/arch/powerpc/mm/hash_low_64.S
+++ b/arch/powerpc/mm/hash_low_64.S
@@ -136,6 +136,7 @@ _GLOBAL(__hash_page_4K)
         and     r0,r0,r4                /* _PAGE_RW & _PAGE_DIRTY ->r0 bit 30*/
         andc    r0,r30,r0               /* r0 = pte & ~r0 */
         rlwimi  r3,r0,32-1,31,31        /* Insert result into PP lsb */
+        ori     r3,r3,HPTE_R_C          /* Always add "C" bit for perf. */
 
         /* We eventually do the icache sync here (maybe inline that
          * code rather than call a C function...) 
@@ -400,6 +401,7 @@ _GLOBAL(__hash_page_4K)
         and     r0,r0,r4                /* _PAGE_RW & _PAGE_DIRTY ->r0 bit 30*/
         andc    r0,r30,r0               /* r0 = pte & ~r0 */
         rlwimi  r3,r0,32-1,31,31        /* Insert result into PP lsb */
+        ori     r3,r3,HPTE_R_C          /* Always add "C" bit for perf. */
 
         /* We eventually do the icache sync here (maybe inline that
          * code rather than call a C function...)
@@ -671,6 +673,7 @@ _GLOBAL(__hash_page_64K)
         and     r0,r0,r4                /* _PAGE_RW & _PAGE_DIRTY ->r0 bit 30*/
         andc    r0,r30,r0               /* r0 = pte & ~r0 */
         rlwimi  r3,r0,32-1,31,31        /* Insert result into PP lsb */
+        ori     r3,r3,HPTE_R_C          /* Always add "C" bit for perf. */
 
         /* We eventually do the icache sync here (maybe inline that
          * code rather than call a C function...)
diff --git a/arch/powerpc/mm/hash_native_64.c b/arch/powerpc/mm/hash_native_64.c
index 33654d1b1b43..3b8205033f15 100644
--- a/arch/powerpc/mm/hash_native_64.c
+++ b/arch/powerpc/mm/hash_native_64.c
@@ -238,7 +238,7 @@ static long native_hpte_updatepp(unsigned long slot, unsigned long newpp,
                 DBG_LOW(" -> hit\n");
                 /* Update the HPTE */
                 hptep->r = (hptep->r & ~(HPTE_R_PP | HPTE_R_N)) |
-                        (newpp & (HPTE_R_PP | HPTE_R_N));
+                        (newpp & (HPTE_R_PP | HPTE_R_N | HPTE_R_C));
                 native_unlock_hpte(hptep);
         }
 
diff --git a/include/asm-powerpc/mmu.h b/include/asm-powerpc/mmu.h
index 96e47d1ce979..885397420104 100644
--- a/include/asm-powerpc/mmu.h
+++ b/include/asm-powerpc/mmu.h
@@ -96,6 +96,8 @@ extern char initial_stab[];
 #define HPTE_R_FLAGS            ASM_CONST(0x00000000000003ff)
 #define HPTE_R_PP               ASM_CONST(0x0000000000000003)
 #define HPTE_R_N                ASM_CONST(0x0000000000000004)
+#define HPTE_R_C                ASM_CONST(0x0000000000000080)
+#define HPTE_R_R                ASM_CONST(0x0000000000000100)
 
 /* Values for PP (assumes Ks=0, Kp=1) */
 /* pp0 will always be 0 for linux     */