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authorDave Hansen <dave.hansen@linux.intel.com>2016-02-12 13:02:15 -0800
committerIngo Molnar <mingo@kernel.org>2016-02-18 09:32:43 +0100
commita927cb83f3300bcb1ae18672e58029acddd18b33 (patch)
tree942413064ab6adbf26405c9ebac038f405db2fa5 /scripts/basic
parent019132ff3daf36c97a4006655dfd00ee42f2b590 (diff)
x86/mm/pkeys: Add functions to fetch PKRU
This adds the raw instruction to access PKRU as well as some accessor functions that correctly handle when the CPU does not support the instruction. We don't use it here, but we will use read_pkru() in the next patch. 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/20160212210215.15238D34@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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