linux-kernel - [tip:x86/urgent] x86/cpu: Probe CPUID leaf 6 even when cpuid

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Message-ID: <tip-3df8d9208569ef0b2313e516566222d745f3b94b@git.kernel.org>
Date:   Mon, 19 Dec 2016 02:56:35 -0800
From:   tip-bot for Andy Lutomirski <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     hpa@...or.com, bp@...en8.de, linux-kernel@...r.kernel.org,
        mingo@...nel.org, tglx@...utronix.de, brgerst@...il.com,
        luto@...nel.org
Subject: [tip:x86/urgent] x86/cpu: Probe CPUID leaf 6 even when cpuid_level
 == 6

Commit-ID:  3df8d9208569ef0b2313e516566222d745f3b94b
Gitweb:     http://git.kernel.org/tip/3df8d9208569ef0b2313e516566222d745f3b94b
Author:     Andy Lutomirski <luto@...nel.org>
AuthorDate: Thu, 15 Dec 2016 10:14:42 -0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 19 Dec 2016 11:50:24 +0100

x86/cpu: Probe CPUID leaf 6 even when cpuid_level == 6

A typo (or mis-merge?) resulted in leaf 6 only being probed if
cpuid_level >= 7.

Fixes: 2ccd71f1b278 ("x86/cpufeature: Move some of the scattered feature bits to x86_capability")
Signed-off-by: Andy Lutomirski <luto@...nel.org>
Acked-by: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Link: http://lkml.kernel.org/r/6ea30c0e9daec21e488b54761881a6dfcf3e04d0.1481825597.git.luto@kernel.org
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>

---
 arch/x86/kernel/cpu/common.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 1f6b50a..dc1697c 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -667,13 +667,14 @@ void get_cpu_cap(struct cpuinfo_x86 *c)
 		c->x86_capability[CPUID_1_EDX] = edx;
 	}
 
+	/* Thermal and Power Management Leaf: level 0x00000006 (eax) */
+	if (c->cpuid_level >= 0x00000006)
+		c->x86_capability[CPUID_6_EAX] = cpuid_eax(0x00000006);
+
 	/* Additional Intel-defined flags: level 0x00000007 */
 	if (c->cpuid_level >= 0x00000007) {
 		cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx);
-
 		c->x86_capability[CPUID_7_0_EBX] = ebx;
-
-		c->x86_capability[CPUID_6_EAX] = cpuid_eax(0x00000006);
 		c->x86_capability[CPUID_7_ECX] = ecx;
 	}