[PATCH v3 3/3] X86, mpx: Intel MPX xstate feature definition

[Qiaowei Ren]

This patch defines xstate feature and extends struct xsave_hdr_struct
to support Intel MPX.

Signed-off-by: Qiaowei Ren <qiaowei....@intel.com>
Signed-off-by: Xudong Hao <xudong....@intel.com>
Signed-off-by: Liu Jinsong <jinsong....@intel.com>
---
 arch/x86/include/asm/processor.h |   12 ++++++++++++
 arch/x86/include/asm/xsave.h     |    6 +++++-
 2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 987c75e..2fe2e75 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -370,6 +370,15 @@ struct ymmh_struct {
        u32 ymmh_space[64];
 };
 
+struct bndregs_struct {
+       u64 bndregs[8];
+} __packed;
+
+struct bndcsr_struct {
+       u64 cfg_reg_u;
+       u64 status_reg;
+} __packed;
+
 struct xsave_hdr_struct {
        u64 xstate_bv;
        u64 reserved1[2];
@@ -380,6 +389,9 @@ struct xsave_struct {
        struct i387_fxsave_struct i387;
        struct xsave_hdr_struct xsave_hdr;
        struct ymmh_struct ymmh;
+       u8 lwp_area[128];
+       struct bndregs_struct bndregs;
+       struct bndcsr_struct bndcsr;
        /* new processor state extensions will go here */
 } __attribute__ ((packed, aligned (64)));
 
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index 0415cda..5cd9de3 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -9,6 +9,8 @@
 #define XSTATE_FP      0x1
 #define XSTATE_SSE     0x2
 #define XSTATE_YMM     0x4
+#define XSTATE_BNDREGS 0x8
+#define XSTATE_BNDCSR  0x10
 
 #define XSTATE_FPSSE   (XSTATE_FP | XSTATE_SSE)
 
@@ -20,10 +22,12 @@
 #define XSAVE_YMM_SIZE     256
 #define XSAVE_YMM_OFFSET    (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
 
+#define XSTATE_FLEXIBLE (XSTATE_FP | XSTATE_SSE | XSTATE_YMM)
+#define XSTATE_EAGER   (XSTATE_BNDREGS | XSTATE_BNDCSR)
 /*
  * These are the features that the OS can handle currently.
  */
-#define XCNTXT_MASK    (XSTATE_FP | XSTATE_SSE | XSTATE_YMM)
+#define XCNTXT_MASK    (XSTATE_FLEXIBLE | XSTATE_EAGER)
 
 #ifdef CONFIG_X86_64
 #define REX_PREFIX     "0x48, "
-- 
1.7.1

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