From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753059AbaEZRBj (ORCPT ); Mon, 26 May 2014 13:01:39 -0400 Received: from mga01.intel.com ([192.55.52.88]:54646 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751862AbaEZQ5w (ORCPT ); Mon, 26 May 2014 12:57:52 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,914,1392192000"; d="scan'208";a="545122326" From: "Fenghua Yu" To: "H. Peter Anvin" , "Ingo Molnar" , "Thomas Gleixner" , "Asit K Mallick" Cc: "linux-kernel" , "x86" , "Fenghua Yu" Subject: [PATCH 06/15] x86/xsaves: Define macro for handle xsave/xrstor fault Date: Mon, 26 May 2014 10:01:13 -0700 Message-Id: <1401123682-5384-7-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 1.8.0.1 In-Reply-To: <1401123682-5384-1-git-send-email-fenghua.yu@intel.com> References: <1401123682-5384-1-git-send-email-fenghua.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Fenghua Yu Define macro to handle fault generated by xsave, xsaveopt, xsaves, xrstor, xrstors instructions. Signed-off-by: Fenghua Yu --- 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