From: Fenghua Yu <fenghua...@intel.com>
Define macro to handle fault generated by xsave, xsaveopt, xsaves, xrstor,
xrstors instructions.
Signed-off-by: Fenghua Yu <fenghua...@intel.com>
---
arch/x86/include/asm/xsave.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h
index 71bdde4..76c2459 100644
--- a/arch/x86/include/asm/xsave.h
+++ b/arch/x86/include/asm/xsave.h
@@ -58,6 +58,13 @@ extern int init_fpu(struct task_struct *child);
#define XRSTOR ".byte " REX_PREFIX "0x0f,0xae,0x2f"
#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)
{
int err;
--
1.8.1.2
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