linux-kernel - [tip:mm/pkeys] x86/cpu, x86/mm/pkeys: Define new CR4 bit

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-f28b49d2bcdb9ef9e771b3d6750f40be9d453316@git.kernel.org>
Date:	Thu, 18 Feb 2016 12:17:35 -0800
From:	tip-bot for Dave Hansen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, riel@...hat.com,
	dave.hansen@...ux.intel.com, akpm@...ux-foundation.org,
	peterz@...radead.org, luto@...capital.net,
	torvalds@...ux-foundation.org, dvlasenk@...hat.com,
	mingo@...nel.org, bp@...en8.de, brgerst@...il.com, hpa@...or.com,
	tglx@...utronix.de, dave@...1.net
Subject: [tip:mm/pkeys] x86/cpu, x86/mm/pkeys: Define new CR4 bit

Commit-ID:  f28b49d2bcdb9ef9e771b3d6750f40be9d453316
Gitweb:     http://git.kernel.org/tip/f28b49d2bcdb9ef9e771b3d6750f40be9d453316
Author:     Dave Hansen <dave.hansen@...ux.intel.com>
AuthorDate: Fri, 12 Feb 2016 13:02:02 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 16 Feb 2016 10:11:14 +0100

x86/cpu, x86/mm/pkeys: Define new CR4 bit

There is a new bit in CR4 for enabling protection keys.  We
will actually enable it later in the series.

Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Dave Hansen <dave@...1.net>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...hat.com>
Cc: linux-mm@...ck.org
Link: http://lkml.kernel.org/r/20160212210202.3CFC3DB2@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/uapi/asm/processor-flags.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/uapi/asm/processor-flags.h b/arch/x86/include/uapi/asm/processor-flags.h
index 79887ab..567de50 100644
--- a/arch/x86/include/uapi/asm/processor-flags.h
+++ b/arch/x86/include/uapi/asm/processor-flags.h
@@ -118,6 +118,8 @@
 #define X86_CR4_SMEP		_BITUL(X86_CR4_SMEP_BIT)
 #define X86_CR4_SMAP_BIT	21 /* enable SMAP support */
 #define X86_CR4_SMAP		_BITUL(X86_CR4_SMAP_BIT)
+#define X86_CR4_PKE_BIT		22 /* enable Protection Keys support */
+#define X86_CR4_PKE		_BITUL(X86_CR4_PKE_BIT)
 
 /*
  * x86-64 Task Priority Register, CR8