x86/speculation: Move arch_smt_update() call to after mitigation decisions

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 <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 9f252082a83b6fd97b6e3e89c26ce1829d996170..3f934ffef8cf3221016eb7c99126103b34135ae9 100644 (file)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -111,6 +111,8 @@ 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.
@@ -638,9 +640,6 @@ specv2_set_mode:
 
        /* 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)