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x86/xsave: Make it clear that the XSAVE macros use (%edi)/(%rdi)
author
H. Peter Anvin
<hpa@linux.intel.com>
Fri, 30 May 2014 15:19:21 +0000
(08:19 -0700)
committer
H. Peter Anvin
<hpa@linux.intel.com>
Fri, 30 May 2014 15:19:21 +0000
(08:19 -0700)
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
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diff --git
a/arch/x86/include/asm/xsave.h
b/arch/x86/include/asm/xsave.h
index 1ba577c670ad110a2ced566757e23b35096f3258..bbebd6e0a9ce67837b17477f5bc5d1831a3d60a1 100644
(file)
--- 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"
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