UBUNTU: SAUCE: s390: print messages for gmb and nobp

BugLink: http://bugs.launchpad.net/bugs/1768474

CVE-2017-5753
CVE-2017-5715
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Khaled Elmously <khalid.elmously@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
(cherry picked from commit 412264cd xenial)
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

arch/s390/kernel/alternative.c

@@ -115,5 +115,11 @@ void __init_or_module apply_alternatives(struct alt_instr *start,
 extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
 void __init apply_alternative_instructions(void)
 {
+	pr_info("gmb %s",
+		(__test_facility(81, S390_lowcore.alt_stfle_fac_list)) ?
+		"enabled" : "disabled");
+	pr_info("nobp %s",
+		(__test_facility(82, S390_lowcore.alt_stfle_fac_list)) ?
+		"enabled" : "disabled");
 	apply_alternatives(__alt_instructions, __alt_instructions_end);
 }