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| author | Fenghua Yu <fenghua.yu@intel.com> | 2014-05-29 11:12:35 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-05-29 14:31:18 -0700 |
| commit | b84e70552e5aad71a1c14536e6ffcfe7934b73e4 (patch) | |
| tree | ef484b9ecf190efba04b9d9d1e5efadef8dc7752 /arch/x86 | |
| parent | 200b08a970b2ae764b670a326088ab8bc0a989cc (diff) | |
| download | op-kernel-dev-b84e70552e5aad71a1c14536e6ffcfe7934b73e4.zip op-kernel-dev-b84e70552e5aad71a1c14536e6ffcfe7934b73e4.tar.gz | |
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: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1401387164-43416-8-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xsave.h | 7 |
1 files changed, 7 insertions, 0 deletions
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; |
