linux-kernel - [tip:mm/pkeys] x86/mm/pkeys: Fix mismerge of protection keys CPUID bits

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Message-ID: <tip-0d47638f80a02b15869f1fe1fc09e5bf996750fd@git.kernel.org>
Date:	Sat, 12 Mar 2016 07:15:59 -0800
From:	tip-bot for Dave Hansen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	dave.hansen@...ux.intel.com, hpa@...or.com,
	kirill.shutemov@...ux.intel.com, tglx@...utronix.de, dave@...1.net,
	torvalds@...ux-foundation.org, bp@...e.de,
	linux-kernel@...r.kernel.org, mingo@...nel.org, luto@...nel.org,
	peterz@...radead.org
Subject: [tip:mm/pkeys] x86/mm/pkeys: Fix mismerge of protection keys CPUID
 bits

Commit-ID:  0d47638f80a02b15869f1fe1fc09e5bf996750fd
Gitweb:     http://git.kernel.org/tip/0d47638f80a02b15869f1fe1fc09e5bf996750fd
Author:     Dave Hansen <dave.hansen@...ux.intel.com>
AuthorDate: Thu, 10 Mar 2016 14:12:13 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 11 Mar 2016 09:55:57 +0100

x86/mm/pkeys: Fix mismerge of protection keys CPUID bits

Kirill Shutemov pointed this out to me.

The tip tree currently has commit:

	dfb4a70f2 [x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions]

whioch added support for two new CPUID bits: X86_FEATURE_PKU and
X86_FEATURE_OSPKE.  But, those bits were mis-merged and put in
cpufeature.h instead of cpufeatures.h.

This didn't cause any breakage *except* it keeps the "ospke" and
"pku" bits from showing up in cpuinfo.

Now cpuinfo has the two new flags:

	flags	: ...  pku ospke

BTW, is it really wise to have cpufeature.h and cpufeatures.h?
It seems like they can only cause confusion and mahem with tab
completion.

Reported-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Acked-by: Borislav Petkov <bp@...e.de>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Dave Hansen <dave@...1.net>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/20160310221213.06F9DB53@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/cpufeature.h  | 4 ----
 arch/x86/include/asm/cpufeatures.h | 4 ++++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 50e292a..3636ec0 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -94,10 +94,6 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
 	(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : 	\
 	 x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
 
-/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
-#define X86_FEATURE_PKU		(16*32+ 3) /* Protection Keys for Userspace */
-#define X86_FEATURE_OSPKE	(16*32+ 4) /* OS Protection Keys Enable */
-
 /*
  * This macro is for detection of features which need kernel
  * infrastructure to be used.  It may *not* directly test the CPU
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index cbb2c56..89949a2 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -270,6 +270,10 @@
 #define X86_FEATURE_PFTHRESHOLD (15*32+12) /* pause filter threshold */
 #define X86_FEATURE_AVIC	(15*32+13) /* Virtual Interrupt Controller */
 
+/* Intel-defined CPU features, CPUID level 0x00000007:0 (ecx), word 16 */
+#define X86_FEATURE_PKU		(16*32+ 3) /* Protection Keys for Userspace */
+#define X86_FEATURE_OSPKE	(16*32+ 4) /* OS Protection Keys Enable */
+
 /*
  * BUG word(s)
  */