From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933272AbcGJSSj (ORCPT ); Sun, 10 Jul 2016 14:18:39 -0400 Received: from terminus.zytor.com ([198.137.202.10]:54040 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755819AbcGJSSg (ORCPT ); Sun, 10 Jul 2016 14:18:36 -0400 Date: Sun, 10 Jul 2016 11:15:38 -0700 From: tip-bot for Yu-cheng Yu Message-ID: Cc: linux-kernel@vger.kernel.org, bp@alien8.de, mingo@kernel.org, brgerst@gmail.com, jpoimboe@redhat.com, dave.hansen@linux.intel.com, fenghua.yu@intel.com, ravi.v.shankar@intel.com, dvlasenk@redhat.com, hpa@zytor.com, dave.hansen@intel.com, sai.praneeth.prakhya@intel.com, yu-cheng.yu@intel.com, torvalds@linux-foundation.org, oleg@redhat.com, peterz@infradead.org, luto@kernel.org, tglx@linutronix.de, quentin.casasnovas@oracle.com Reply-To: sai.praneeth.prakhya@intel.com, dave.hansen@intel.com, torvalds@linux-foundation.org, yu-cheng.yu@intel.com, peterz@infradead.org, oleg@redhat.com, quentin.casasnovas@oracle.com, tglx@linutronix.de, luto@kernel.org, mingo@kernel.org, bp@alien8.de, linux-kernel@vger.kernel.org, jpoimboe@redhat.com, brgerst@gmail.com, ravi.v.shankar@intel.com, fenghua.yu@intel.com, dave.hansen@linux.intel.com, hpa@zytor.com, dvlasenk@redhat.com In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/fpu] x86/fpu/xstate: Fix xstate_offsets, xstate_sizes for non-extended xstates Git-Commit-ID: ac73b27aea4eacdd7555f664d5fc6e1d4d1c8bf6 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: ac73b27aea4eacdd7555f664d5fc6e1d4d1c8bf6 Gitweb: http://git.kernel.org/tip/ac73b27aea4eacdd7555f664d5fc6e1d4d1c8bf6 Author: Yu-cheng Yu AuthorDate: Fri, 17 Jun 2016 13:07:19 -0700 Committer: Ingo Molnar CommitDate: Sun, 10 Jul 2016 17:12:11 +0200 x86/fpu/xstate: Fix xstate_offsets, xstate_sizes for non-extended xstates The arrays xstate_offsets[] and xstate_sizes[] record XSAVE standard- format offsets and sizes. Values for non-extended state components fpu and xmm's were not initialized or used. Ptrace format conversion needs them. Fix it. Signed-off-by: Yu-cheng Yu Reviewed-by: Dave Hansen Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Quentin Casasnovas Cc: Ravi V. Shankar Cc: Sai Praneeth Prakhya Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/cf3ea36cf30e2a99e37da6483e65446d018ff0a7.1466179491.git.yu-cheng.yu@intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/fpu/xstate.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 09bac97..f8d1aff 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -246,6 +246,15 @@ static void __init setup_xstate_features(void) /* start at the beginnning of the "extended state" */ unsigned int last_good_offset = offsetof(struct xregs_state, extended_state_area); + /* + * The FP xstates and SSE xstates are legacy states. They are always + * in the fixed offsets in the xsave area in either compacted form + * or standard form. + */ + xstate_offsets[0] = 0; + xstate_sizes[0] = offsetof(struct fxregs_state, xmm_space); + xstate_offsets[1] = xstate_sizes[0]; + xstate_sizes[1] = FIELD_SIZEOF(struct fxregs_state, xmm_space); for (i = FIRST_EXTENDED_XFEATURE; i < XFEATURE_MAX; i++) { if (!xfeature_enabled(i))