Commit b84e7055 authored by Fenghua Yu's avatar Fenghua Yu Committed by H. Peter Anvin

x86/xsaves: Define a macro for handling xsave/xrstor instruction fault

Define a macro to handle fault generated by xsave, xsaveopt, xsaves, xrstor,
and xrstors instructions. It is used in functions like xsave_state() etc.
Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-8-git-send-email-fenghua.yu@intel.comSigned-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 200b08a9
...@@ -58,6 +58,13 @@ extern int init_fpu(struct task_struct *child); ...@@ -58,6 +58,13 @@ extern int init_fpu(struct task_struct *child);
#define XRSTOR ".byte " REX_PREFIX "0x0f,0xae,0x2f" #define XRSTOR ".byte " REX_PREFIX "0x0f,0xae,0x2f"
#define XRSTORS ".byte " REX_PREFIX "0x0f,0xc7,0x1f" #define XRSTORS ".byte " REX_PREFIX "0x0f,0xc7,0x1f"
#define xstate_fault ".section .fixup,\"ax\"\n" \
"3: movl $-1,%[err]\n" \
" jmp 2b\n" \
".previous\n" \
_ASM_EXTABLE(1b, 3b) \
: [err] "=r" (err)
static inline int fpu_xrstor_checking(struct xsave_struct *fx) static inline int fpu_xrstor_checking(struct xsave_struct *fx)
{ {
int err; int err;
......
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