From nobody Sat Feb 7 07:30:56 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=quarantine dis=none) header.from=suse.com ARC-Seal: i=1; a=rsa-sha256; t=1619102866; cv=none; d=zohomail.com; s=zohoarc; b=k9e/361cLsEI4a0WEQb8ZniH8ama8E+g98hfnOL43OQsgVn1oeUhB3kZPnWvdYPLUhLAFMysip0AOe32LJZVlxtWKVIKofGZXmCUKzDG3k46LMx5Z6H8fyp8evasXfgrl5JXU1KWC92W4aTS3vklh+dZtjxMyyocjH1JYT5zWDc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1619102866; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=2vhMDJVGPLut9dUUvDo0ADaCfxiPqS6gGUbBUs/N0kg=; b=MKZPlbrFqCME36wqAr7j85X802NE0UmhDPZ+fPq4NMdWq/AoAkWlpII3gKS6sUm39QUhaPOzLJwk+z/K4yj4cpiePzjth86h1adq+epnwk/smqT+dQSM7al+cT9P1jDK5gKPL103NHsVnfVn8QjngqiSndRDB38VHkIMCAFqRz8= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=quarantine dis=none) header.from= Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1619102866771489.5668871450016; Thu, 22 Apr 2021 07:47:46 -0700 (PDT) Received: from list by lists.xenproject.org with outflank-mailman.115485.220355 (Exim 4.92) (envelope-from ) id 1lZac1-0003qZ-JR; Thu, 22 Apr 2021 14:47:25 +0000 Received: by outflank-mailman (output) from mailman id 115485.220355; Thu, 22 Apr 2021 14:47:25 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZac1-0003qS-GU; Thu, 22 Apr 2021 14:47:25 +0000 Received: by outflank-mailman (input) for mailman id 115485; Thu, 22 Apr 2021 14:47:24 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lZac0-0003qI-IA for xen-devel@lists.xenproject.org; Thu, 22 Apr 2021 14:47:24 +0000 Received: from mx2.suse.de (unknown [195.135.220.15]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 659f57e8-ec80-4d3c-9fdf-8d577b13b234; Thu, 22 Apr 2021 14:47:23 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 2C276ABB1; Thu, 22 Apr 2021 14:47:23 +0000 (UTC) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 659f57e8-ec80-4d3c-9fdf-8d577b13b234 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1619102843; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=2vhMDJVGPLut9dUUvDo0ADaCfxiPqS6gGUbBUs/N0kg=; b=Lmgbr5OOk6rjy1YhZnMk1M8RsWc6m6E30tvi1IoNRWef79uUGW2MN3udMUMN1AB/ZjPEf9 p1pMSw9hguRx5vH7rV1qYSKLC6xxFjz5Z5xtVdW4IbXJkwLpgLh1PJTQ8N4Ev6VXpKuLsW x+fuYOTJsLuRm3zRXxvrzfvey3lbITo= Subject: [PATCH v3 07/22] x86/xstate: avoid accounting for unsupported components From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , George Dunlap , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= References: <322de6db-e01f-0b57-5777-5d94a13c441a@suse.com> Message-ID: Date: Thu, 22 Apr 2021 16:47:23 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 MIME-Version: 1.0 In-Reply-To: <322de6db-e01f-0b57-5777-5d94a13c441a@suse.com> Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) Content-Type: text/plain; charset="utf-8" There's no point in including unsupported components in the size calculations of xstate_{alloc,update}_save_area(). Signed-off-by: Jan Beulich --- a/xen/arch/x86/xstate.c +++ b/xen/arch/x86/xstate.c @@ -501,8 +501,12 @@ int xstate_alloc_save_area(struct vcpu * unsigned int i; =20 for ( size =3D 0, i =3D 2; i < xstate_features; ++i ) + { + if ( !(xfeature_mask & (1ul << i)) ) + continue; if ( size < xstate_size(i) ) size =3D xstate_size(i); + } size +=3D XSTATE_AREA_MIN_SIZE; } =20 @@ -543,6 +547,8 @@ int xstate_update_save_area(struct vcpu =20 for ( size =3D old =3D XSTATE_AREA_MIN_SIZE, i =3D 2; i < xstate_featu= res; ++i ) { + if ( !(xfeature_mask & (1ul << i)) ) + continue; if ( xcr0_max & (1ul << i) ) size =3D max(size, xstate_offset(i) + xstate_size(i)); if ( v->arch.xcr0_accum & (1ul << i) )