x86, cpu: Only CPU features determine NX capabilities

Fix the NX feature boot warning when NX is missing to correctly
reflect that BIOSes cannot disable NX now.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
LKML-Reference: <1289414154-7829-5-git-send-email-kees.cook@canonical.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

diff --git a/arch/x86/mm/setup_nx.c b/arch/x86/mm/setup_nx.c
index a3250aa..410531d 100644 (file)
--- a/arch/x86/mm/setup_nx.c
+++ b/arch/x86/mm/setup_nx.c
@@ -41,7 +41,7 @@ void __init x86_report_nx(void)
 {
        if (!cpu_has_nx) {
                printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "
 {
        if (!cpu_has_nx) {
                printk(KERN_NOTICE "Notice: NX (Execute Disable) protection "

-                      "missing in CPU or disabled in BIOS!\n");
+                      "missing in CPU!\n");

        } else {
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
                if (disable_nx) {
        } else {
 #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
                if (disable_nx) {