linux-kernel - [PATCH 4.4 43/43] x86/speculation/l1tf: Fix up CPU feature flags

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Date:   Tue, 14 Aug 2018 19:18:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 4.4 43/43] x86/speculation/l1tf: Fix up CPU feature flags

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Guenter Roeck <linux@...ck-us.net>

In linux-4.4.y, the definition of X86_FEATURE_RETPOLINE and
X86_FEATURE_RETPOLINE_AMD is different from the upstream
definition. Result is an overlap with the newly introduced
X86_FEATURE_L1TF_PTEINV. Update RETPOLINE definitions to match
upstream definitions to improve alignment with upstream code.

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/include/asm/cpufeatures.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -193,12 +193,12 @@
 #define X86_FEATURE_HW_PSTATE	( 7*32+ 8) /* AMD HW-PState */
 #define X86_FEATURE_PROC_FEEDBACK ( 7*32+ 9) /* AMD ProcFeedbackInterface */
 
+#define X86_FEATURE_RETPOLINE	( 7*32+12) /* "" Generic Retpoline mitigation for Spectre variant 2 */
+#define X86_FEATURE_RETPOLINE_AMD ( 7*32+13) /* "" AMD Retpoline mitigation for Spectre variant 2 */
+
 #define X86_FEATURE_INTEL_PT	( 7*32+15) /* Intel Processor Trace */
 #define X86_FEATURE_RSB_CTXSW	( 7*32+19) /* "" Fill RSB on context switches */
 
-#define X86_FEATURE_RETPOLINE	( 7*32+29) /* "" Generic Retpoline mitigation for Spectre variant 2 */
-#define X86_FEATURE_RETPOLINE_AMD ( 7*32+30) /* "" AMD Retpoline mitigation for Spectre variant 2 */
-
 #define X86_FEATURE_MSR_SPEC_CTRL ( 7*32+16) /* "" MSR SPEC_CTRL is implemented */
 #define X86_FEATURE_SSBD	( 7*32+17) /* Speculative Store Bypass Disable */