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Commit c2bc11f1 authored by Fenghua Yu's avatar Fenghua Yu Committed by H. Peter Anvin
Browse files

x86, AVX-512: Enable AVX-512 States Context Switch 



This patch enables Opmask, ZMM_Hi256, and Hi16_ZMM AVX-512 states for
xstate context switch.

Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1392931491-33237-2-git-send-email-fenghua.yu@intel.com


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org> # hw enabling
parent 8e5780fd

arch/x86/include/asm/xsave.h

+10 −6
Original line number Diff line number Diff line
@@ -11,6 +11,9 @@ 
#define XSTATE_YMM		0x4

#define XSTATE_BNDREGS		0x8

#define XSTATE_BNDCSR		0x10

#define XSTATE_OPMASK		0x20

#define XSTATE_ZMM_Hi256	0x40

#define XSTATE_Hi16_ZMM		0x80



#define XSTATE_FPSSE	(XSTATE_FP | XSTATE_SSE)
@@ -23,7 +26,8 @@ 
#define XSAVE_YMM_OFFSET    (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)



/* Supported features which support lazy state saving */

#define XSTATE_LAZY	(XSTATE_FP | XSTATE_SSE | XSTATE_YMM)

#define XSTATE_LAZY	(XSTATE_FP | XSTATE_SSE | XSTATE_YMM		      \

			| XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)



/* Supported features which require eager state saving */

#define XSTATE_EAGER	(XSTATE_BNDREGS | XSTATE_BNDCSR)