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x86/bugs: Make boot modes __ro_after_init

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commit f9544b2b07 upstream

There's no reason for these to be changed after boot.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2018-05-03 15:03:30 -07:00 committed by Greg Kroah-Hartman
parent 87895ae1e9
commit c024722ffe
1 changed files with 3 additions and 2 deletions
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5
arch/x86/kernel/cpu/bugs.c
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@ -129,7 +129,8 @@ static const char *spectre_v2_strings[] = {
#undef pr_fmt
#define pr_fmt(fmt) "Spectre V2 : " fmt
static enum spectre_v2_mitigation spectre_v2_enabled = SPECTRE_V2_NONE;
static enum spectre_v2_mitigation spectre_v2_enabled __ro_after_init =
SPECTRE_V2_NONE;
void x86_spec_ctrl_set(u64 val)
{
@ -407,7 +408,7 @@ static void __init spectre_v2_select_mitigation(void)
#undef pr_fmt
#define pr_fmt(fmt) "Speculative Store Bypass: " fmt
static enum ssb_mitigation ssb_mode = SPEC_STORE_BYPASS_NONE;
static enum ssb_mitigation ssb_mode __ro_after_init = SPEC_STORE_BYPASS_NONE;
/* The kernel command line selection */
enum ssb_mitigation_cmd {