x86/speculation: Unify conditional spectre v2 print functions

There is no point in having two functions and a conditional at the call
site.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw@amazon.co.uk>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Casey Schaufler <casey.schaufler@intel.com>
Cc: Asit Mallick <asit.k.mallick@intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Waiman Long <longman9394@gmail.com>
Cc: Greg KH <gregkh@linuxfoundation.org>
Cc: Dave Stewart <david.c.stewart@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20181125185004.986890749@linutronix.de
CVE-2017-5715

(cherry picked from commit 495d470e9828500e0155027f230449ac5e29c025)
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: Juerg Haefliger <juergh@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 26d33322a68a2d76d63c54cc2ba1dd2f907abb51..757b49992efc052ecf6086f11b377987229ff3fb 100644 (file)
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -256,15 +256,9 @@ static const struct {
        { "auto",               SPECTRE_V2_CMD_AUTO,              false },
 };
 
-static void __init spec2_print_if_insecure(const char *reason)
+static void __init spec_v2_print_cond(const char *reason, bool secure)
 {
-       if (boot_cpu_has_bug(X86_BUG_SPECTRE_V2))
-               pr_info("%s selected on command line.\n", reason);
-}
-
-static void __init spec2_print_if_secure(const char *reason)
-{
-       if (!boot_cpu_has_bug(X86_BUG_SPECTRE_V2))
+       if (boot_cpu_has_bug(X86_BUG_SPECTRE_V2) != secure)
                pr_info("%s selected on command line.\n", reason);
 }
 
@@ -307,11 +301,8 @@ static enum spectre_v2_mitigation_cmd __init spectre_v2_parse_cmdline(void)
                return SPECTRE_V2_CMD_AUTO;
        }
 
-       if (mitigation_options[i].secure)
-               spec2_print_if_secure(mitigation_options[i].option);
-       else
-               spec2_print_if_insecure(mitigation_options[i].option);
-
+       spec_v2_print_cond(mitigation_options[i].option,
+                          mitigation_options[i].secure);
        return cmd;
 }