[tip:x86/xsave] x86/xsaves: Define macros for xsave instructions

[tip:x86/xsave] x86/xsaves: Define macros for xsave instructions

[tip-bot for Fenghua Yu]

Commit-ID:  200b08a970b2ae764b670a326088ab8bc0a989cc
Gitweb:     http://git.kernel.org/tip/200b08a970b2ae764b670a326088ab8bc0a989cc
Author:     Fenghua Yu <fenghua.yu@intel.com>
AuthorDate: Thu, 29 May 2014 11:12:34 -0700
Committer:  H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Thu, 29 May 2014 14:31:16 -0700

x86/xsaves: Define macros for xsave instructions

Define macros for xsave, xsaveopt, xsaves, xrstor, and xrstors inline
instructions. The instructions will be used for saving and restoring xstate.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-7-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
 arch/x86/include/asm/xsave.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index d949ef2..71bdde4 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -52,6 +52,12 @@ extern void xsave_init(void);
 extern void update_regset_xstate_info(unsigned int size, u64 xstate_mask);
 extern int init_fpu(struct task_struct *child);
 
+#define XSAVE		".byte " REX_PREFIX "0x0f,0xae,0x27"
+#define XSAVEOPT	".byte " REX_PREFIX "0x0f,0xae,0x37"
+#define XSAVES		".byte " REX_PREFIX "0x0f,0xc7,0x2f"
+#define XRSTOR		".byte " REX_PREFIX "0x0f,0xae,0x2f"
+#define XRSTORS		".byte " REX_PREFIX "0x0f,0xc7,0x1f"
+
 static inline int fpu_xrstor_checking(struct xsave_struct *fx)
 {
 	int err;

[tip:x86/xsave] x86/xsave: Make it clear that the XSAVE macros use (%edi)/(%rdi)

[tip-bot for H. Peter Anvin]

Commit-ID:  c9e5a5a7034146493386d985ff432aed8059929a
Gitweb:     http://git.kernel.org/tip/c9e5a5a7034146493386d985ff432aed8059929a
Author:     H. Peter Anvin <hpa@linux.intel.com>
AuthorDate: Fri, 30 May 2014 08:19:21 -0700
Committer:  H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Fri, 30 May 2014 08:19:21 -0700

x86/xsave: Make it clear that the XSAVE macros use (%edi)/(%rdi)

The XSAVE instruction family takes a memory argment.  The macros use
(%edi)/(%rdi) as that memory argument - make that clear to the reader.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-7-git-send-email-fenghua.yu@intel.com
---
 arch/x86/include/asm/xsave.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index 1ba577c..bbebd6e 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -52,6 +52,7 @@ extern void xsave_init(void);
 extern void update_regset_xstate_info(unsigned int size, u64 xstate_mask);
 extern int init_fpu(struct task_struct *child);
 
+/* These macros all use (%edi)/(%rdi) as the single memory argument. */
 #define XSAVE		".byte " REX_PREFIX "0x0f,0xae,0x27"
 #define XSAVEOPT	".byte " REX_PREFIX "0x0f,0xae,0x37"
 #define XSAVES		".byte " REX_PREFIX "0x0f,0xc7,0x2f"