powerpc: Fix TLB cleanup at boot on POWER8



The TLB has 512 congruence classes (2048 entries 4 way set associative)
while P7 had 128

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 1ad936e8

arch/powerpc/kernel/cpu_setup_power.S

+6 −2

Original line number	Diff line number	Diff line
		@@ -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