[PATCH 3.13 019/151] x86, AVX-512: Enable AVX-512 States Context Switch

Kamal Mostafa kamal at canonical.com
Fri May 2 15:36:47 UTC 2014


3.13.11.1 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fenghua Yu <fenghua.yu at intel.com>

commit c2bc11f10a39527cd1bb252097b5525664560956 upstream.

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

Signed-off-by: Fenghua Yu <fenghua.yu at intel.com>
Link: http://lkml.kernel.org/r/1392931491-33237-2-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa at linux.intel.com>
[ Fenghua Yu: backport to 3.13-stable (apply new bits directly to XCNTXT_MASK) ]
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/x86/include/asm/xsave.h | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index 0415cda..0b651f9 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -6,9 +6,14 @@
 
 #define XSTATE_CPUID		0x0000000d
 
-#define XSTATE_FP	0x1
-#define XSTATE_SSE	0x2
-#define XSTATE_YMM	0x4
+#define XSTATE_FP		0x1
+#define XSTATE_SSE		0x2
+#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 +28,7 @@
 /*
  * These are the features that the OS can handle currently.
  */
-#define XCNTXT_MASK	(XSTATE_FP | XSTATE_SSE | XSTATE_YMM)
+#define XCNTXT_MASK	(XSTATE_FP | XSTATE_SSE | XSTATE_YMM | XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
 
 #ifdef CONFIG_X86_64
 #define REX_PREFIX	"0x48, "
-- 
1.9.1





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