From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933634AbaE3PME (ORCPT ); Fri, 30 May 2014 11:12:04 -0400 Received: from terminus.zytor.com ([198.137.202.10]:44129 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933498AbaE3PMA (ORCPT ); Fri, 30 May 2014 11:12:00 -0400 Date: Fri, 30 May 2014 08:11:49 -0700 From: tip-bot for Fenghua Yu Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, fenghua.yu@intel.com, tglx@linutronix.de, hpa@linux.intel.com In-Reply-To: <1401387164-43416-8-git-send-email-fenghua.yu@intel.com> References: <1401387164-43416-8-git-send-email-fenghua.yu@intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/xsave] x86/xsaves: Define a macro for handling xsave/ xrstor instruction fault Git-Commit-ID: b84e70552e5aad71a1c14536e6ffcfe7934b73e4 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: b84e70552e5aad71a1c14536e6ffcfe7934b73e4 Gitweb: http://git.kernel.org/tip/b84e70552e5aad71a1c14536e6ffcfe7934b73e4 Author: Fenghua Yu AuthorDate: Thu, 29 May 2014 11:12:35 -0700 Committer: H. Peter Anvin 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 Link: http://lkml.kernel.org/r/1401387164-43416-8-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin --- 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;