From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964828AbcFQUOA (ORCPT ); Fri, 17 Jun 2016 16:14:00 -0400 Received: from mga04.intel.com ([192.55.52.120]:22395 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933676AbcFQUNe (ORCPT ); Fri, 17 Jun 2016 16:13:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,485,1459839600"; d="scan'208";a="1000213695" From: Yu-cheng Yu To: linux-kernel@vger.kernel.org, x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar Cc: Dave Hansen , Sai Praneeth Prakhya , "Ravi V. Shankar" , Fenghua Yu , Yu-cheng Yu Subject: [PATCH 5/5] x86/fpu/xstate: Fix xstate_offsets, xstate_sizes for non-extended xstates Date: Fri, 17 Jun 2016 13:07:19 -0700 Message-Id: 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 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 --- 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 bae8840..822a18f 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)) -- 1.9.1