From a5828ed3d03d38399159dc17a98cefde3109a66b Mon Sep 17 00:00:00 2001 From: Yu-cheng Yu Date: Tue, 24 Jan 2017 10:25:46 -0800 Subject: x86/fpu/xstate: Move XSAVES state init to a function Make XSTATE init similar to existing code; move it to a separate function. There is no functionality change. Signed-off-by: Yu-cheng Yu Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Dave Hansen Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Ravi V. Shankar Cc: Rik van Riel Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/1485282346-15437-1-git-send-email-yu-cheng.yu@intel.com [ Minor cleanliness edits. ] Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu/internal.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/x86/include/asm/fpu/internal.h') diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index d4a684997497..255645f60ca2 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -87,6 +87,16 @@ extern void fpstate_init_soft(struct swregs_state *soft); #else static inline void fpstate_init_soft(struct swregs_state *soft) {} #endif + +static inline void fpstate_init_xstate(struct xregs_state *xsave) +{ + /* + * XRSTORS requires these bits set in xcomp_bv, or it will + * trigger #GP: + */ + xsave->header.xcomp_bv = XCOMP_BV_COMPACTED_FORMAT | xfeatures_mask; +} + static inline void fpstate_init_fxstate(struct fxregs_state *fx) { fx->cwd = 0x37f; -- cgit