From 38b0c8454b56a74fe785f0db1d218afa8f6ea478 Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Mon, 22 May 2017 15:53:00 +1000 Subject: cpu: Introduce smt_lowest() Recent CPUs have introduced a lower SMT priority. This uses the Linux pattern of executing priority nops in descending order to get a simple portable way to put the CPU into lowest SMT priority. Introduce smt_lowest() and use it in place of smt_very_low and smt_low ; smt_very_low sequences. Signed-off-by: Nicholas Piggin Signed-off-by: Stewart Smith --- asm/head.S | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'asm') diff --git a/asm/head.S b/asm/head.S index a2dcb8c..8e33f22 100644 --- a/asm/head.S +++ b/asm/head.S @@ -398,7 +398,7 @@ secondary_wait: */ LOAD_IMM32(%r3, boot_flag - __head) add %r3,%r3,%r30 -1: smt_very_low +1: smt_lowest lwz %r0,0(%r3) cmpdi %r0,0 beq 1b @@ -416,7 +416,7 @@ secondary_wait: 1: /* Now wait for cpu_secondary_start to be set */ LOAD_ADDR_FROM_TOC(%r3, cpu_secondary_start) -1: smt_very_low +1: smt_lowest ld %r0,0(%r3) cmpdi %r0,0 beq 1b @@ -441,7 +441,7 @@ secondary_wait: /* Not found... what to do ? set some global error ? */ secondary_not_found: - smt_very_low + smt_lowest b . call_relocate: -- cgit v1.1