Commit 21e726c4 authored May 29, 2014 by Fenghua Yu Committed by H. Peter Anvin May 29, 2014

x86/xsaves: Clear reserved bits in xsave header



The reserved bits (128~511) in the xsave header must be zero according to
X86 SDM. Clear the bits in this patch.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-12-git-send-email-fenghua.yu@intel.com


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

parent facbf4d9

arch/x86/kernel/i387.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -375,7 +375,7 @@ int xstateregs_set(struct task_struct target, const struct user_regset regset,
		/*
		* These bits must be zero.
		*/
		xsave_hdr->reserved1[0] = xsave_hdr->reserved1[1] = 0;
		memset(xsave_hdr->reserved, 0, 48);

		return ret;
		}