linux-kernel - [tip:x86/pti] x86/speculation: Unify conditional spectre v2 print functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <tip-495d470e9828500e0155027f230449ac5e29c025@git.kernel.org>
Date:   Wed, 28 Nov 2018 06:29:03 -0800
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dave.hansen@...el.com, linux-kernel@...r.kernel.org,
        luto@...nel.org, longman9394@...il.com, jpoimboe@...hat.com,
        peterz@...radead.org, keescook@...omium.org,
        david.c.stewart@...el.com, hpa@...or.com,
        torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
        thomas.lendacky@....com, arjan@...ux.intel.com, dwmw@...zon.co.uk,
        ak@...ux.intel.com, jkosina@...e.cz, mingo@...nel.org,
        jcm@...hat.com, tglx@...utronix.de, aarcange@...hat.com,
        asit.k.mallick@...el.com, tim.c.chen@...ux.intel.com,
        casey.schaufler@...el.com
Subject: [tip:x86/pti] x86/speculation: Unify conditional spectre v2 print
 functions

Commit-ID:  495d470e9828500e0155027f230449ac5e29c025
Gitweb:     https://git.kernel.org/tip/495d470e9828500e0155027f230449ac5e29c025
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Sun, 25 Nov 2018 19:33:44 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Wed, 28 Nov 2018 11:57:09 +0100

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@...utronix.de>
Reviewed-by: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: Josh Poimboeuf <jpoimboe@...hat.com>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Casey Schaufler <casey.schaufler@...el.com>
Cc: Asit Mallick <asit.k.mallick@...el.com>
Cc: Arjan van de Ven <arjan@...ux.intel.com>
Cc: Jon Masters <jcm@...hat.com>
Cc: Waiman Long <longman9394@...il.com>
Cc: Greg KH <gregkh@...uxfoundation.org>
Cc: Dave Stewart <david.c.stewart@...el.com>
Cc: Kees Cook <keescook@...omium.org>
Cc: stable@...r.kernel.org
Link: https://lkml.kernel.org/r/20181125185004.986890749@linutronix.de


---
 arch/x86/kernel/cpu/bugs.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 9279cbabe16e..4f5a6319dca6 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -257,15 +257,9 @@ 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);
 }
 
@@ -309,11 +303,8 @@ 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;
 }