Commit-ID: b84e70552e5aad71a1c14536e6ffcfe7934b73e4 Gitweb: http://git.kernel.org/tip/b84e70552e5aad71a1c14536e6ffcfe7934b73e4 Author: Fenghua Yu <fenghua...@intel.com> AuthorDate: Thu, 29 May 2014 11:12:35 -0700 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Thu, 29 May 2014 14:31:18 -0700
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...@intel.com> Link: http://lkml.kernel.org/r/1401387164-43416-8-git-send-email-fenghua...@intel.com Signed-off-by: H. Peter Anvin <h...@linux.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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
