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

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Message-Id: <1386401563-3609-1-git-send-email-qiaowei.ren@intel.com>
Date:	Sat,  7 Dec 2013 15:32:43 +0800
From:	Qiaowei Ren <qiaowei.ren@...el.com>
To:	Paolo Bonzini <pbonzini@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org
Cc:	linux-kernel@...r.kernel.org, qemu-devel@...gnu.org,
	kvm@...r.kernel.org, Qiaowei Ren <qiaowei.ren@...el.com>,
	Xudong Hao <xudong.hao@...el.com>,
	Liu Jinsong <jinsong.liu@...el.com>
Subject: [PATCH v3 3/3] X86, mpx: Intel MPX xstate feature definition

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

Signed-off-by: Qiaowei Ren <qiaowei.ren@...el.com>
Signed-off-by: Xudong Hao <xudong.hao@...el.com>
Signed-off-by: Liu Jinsong <jinsong.liu@...el.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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