powerpc: Fix TLB cleanup at boot on POWER8

[pandora-kernel.git] / arch / powerpc / kernel / cpu_setup_power.S

diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index a283b64..18b5b9c 100644 (file)
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -135,8 +135,12 @@ __init_HFSCR:
        blr
 
 __init_TLB:
-       /* Clear the TLB */
-       li      r6,128
+       /*
+        * Clear the TLB using the "IS 3" form of tlbiel instruction
+        * (invalidate by congruence class). P7 has 128 CCs, P8 has 512
+        * so we just always do 512
+        */
+       li      r6,512
        mtctr   r6
        li      r7,0xc00        /* IS field = 0b11 */
        ptesync