From 1c7d67073e2d196597f541351bc9b109c8a93528 Mon Sep 17 00:00:00 2001 From: Jack Steiner Date: Thu, 31 Aug 2006 11:34:47 -0500 Subject: [PATCH] [IA64] Save register stack contents on cpu start The SN PROM uses the register stack in the slave loop. The contents must be preserved for the OS to return to the slave loop via offlining a cpu or for kexec. A 'flushrs" is needed to force the stack to be written to memory prior to changing bspstore. Signed-off-by: Jack Steiner Signed-off-by: Tony Luck --- arch/ia64/kernel/head.S | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S index 29236f0c62b5..44d540efa6d1 100644 --- a/arch/ia64/kernel/head.S +++ b/arch/ia64/kernel/head.S @@ -197,6 +197,11 @@ start_ap: ;; srlz.i ;; + { + flushrs // must be first insn in group + srlz.i + } + ;; /* * Save the region registers, predicate before they get clobbered */