| Date | Thu, 18 Feb 2016 12:17:35 -0800 | From | tip-bot for Dave Hansen <> | Subject | [tip:mm/pkeys] x86/cpu, x86/mm/pkeys: Define new CR4 bit |
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Commit-ID: f28b49d2bcdb9ef9e771b3d6750f40be9d453316 Gitweb: http://git.kernel.org/tip/f28b49d2bcdb9ef9e771b3d6750f40be9d453316 Author: Dave Hansen <dave.hansen@linux.intel.com> AuthorDate: Fri, 12 Feb 2016 13:02:02 -0800 Committer: Ingo Molnar <mingo@kernel.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@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Dave Hansen <dave@sr71.net> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: linux-mm@kvack.org Link: http://lkml.kernel.org/r/20160212210202.3CFC3DB2@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.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
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