From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753102AbcEIUvu (ORCPT ); Mon, 9 May 2016 16:51:50 -0400 Received: from mga11.intel.com ([192.55.52.93]:14322 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752935AbcEIUvO (ORCPT ); Mon, 9 May 2016 16:51:14 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.24,601,1455004800"; d="scan'208";a="100071049" From: Yu-cheng Yu To: linux-kernel@vger.kernel.org, x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar Cc: Dave Hansen , Andy Lutomirski , Borislav Petkov , Sai Praneeth Prakhya , "Ravi V. Shankar" , Fenghua Yu , Yu-cheng Yu Subject: [PATCH v5 12/13] x86/xsaves: Fix fpstate_init() for XSAVES Date: Mon, 9 May 2016 13:46:09 -0700 Message-Id: <9c6c58a0a4a66568b8e887944d2426d59370ae05.1462816638.git.yu-cheng.yu@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When XSAVES is used, xsave.header.xcomp_bv[63] must be set. Signed-off-by: Yu-cheng Yu --- arch/x86/kernel/fpu/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c index 41ab106..25e2605 100644 --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -224,6 +224,9 @@ void fpstate_init(union fpregs_state *state) memset(state, 0, kernel_xstate_size); + if (cpu_has_xsaves) + state->xsave.header.xcomp_bv = (u64)1 << 63; + if (cpu_has_fxsr) fpstate_init_fxstate(&state->fxsave); else -- 1.9.1