From 5d2673f7a47a339eb98049d02a5c0f39073c0baa Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf Date: Tue, 2 Apr 2019 10:00:14 -0500 Subject: [PATCH] x86/speculation: Move arch_smt_update() call to after mitigation decisions commit 7c3658b20194a5b3209a143f63bc9c643c6a3ae2 upstream. arch_smt_update() now has a dependency on both Spectre v2 and MDS mitigations. Move its initial call to after all the mitigation decisions have been made. Signed-off-by: Josh Poimboeuf Signed-off-by: Thomas Gleixner Reviewed-by: Tyler Hicks Acked-by: Jiri Kosina Signed-off-by: Ben Hutchings --- arch/x86/kernel/cpu/bugs.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index c256c38ad432bf..e1ed6c51f8664b 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -161,6 +161,8 @@ void __init check_bugs(void) mds_select_mitigation(); + arch_smt_update(); + #ifdef CONFIG_X86_32 /* * Check whether we are able to run this kernel safely on SMP. @@ -677,9 +679,6 @@ static void __init spectre_v2_select_mitigation(void) /* Set up IBPB and STIBP depending on the general spectre V2 command */ spectre_v2_user_select_mitigation(cmd); - - /* Enable STIBP if appropriate */ - arch_smt_update(); } static void update_stibp_msr(void * __unused)