Received: by 2002:a05:6a10:206:0:0:0:0 with SMTP id 6csp3556658pxj; Mon, 24 May 2021 09:17:40 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyPajkDCelASI+GFCIDeJ8vtu2JPC4XF+A5uhYYYPv77Sd5BuGz1LF5rteCHbY6lLmjvY3x X-Received: by 2002:a05:6602:164c:: with SMTP id y12mr16434990iow.78.1621873060387; Mon, 24 May 2021 09:17:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1621873060; cv=none; d=google.com; s=arc-20160816; b=sh4LpizYB/hc47yDcl8ECPfgceIhYyzpzwlg+RSIVrHzU1DF+n06ErJno4M61rPfEQ gdYJ3hZ0PbGmcCtX/Bgvwvkz/pY/iz0VBWlhW98T+y1h+APkPlh5B4WDIJJYyUGMR++a rNLeaFLu14ipb29aUdhX5nCCFoj1+f1N4UVLnDQ1/oGT8I+X5/9pHDxEijRGel0NjON5 KOiUa8IthlHWfJTeBtqvAw/lxGKm/I+bD4j8emIWmyuB9TWfAiaxp76D7QHF9P9FFQvR KVBrrT++p5JurU5Q5J6f9g3MdGHSlnE8dnTkK5CWnme7dfnQgBit3G+002alaoUGncfZ RpMQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :organization:references:in-reply-to:message-id:subject:cc:to:from :date:dkim-signature; bh=DrvjMI3EBxdgZsRm5hUVcKMed5KOSzIm0p0poRBgU7I=; b=QT72X3TMqwCvBbl+4iuN492La4O0KiHPHsaL6/ihRf9KMe18DjcjSI5Ge0uazCftCk RbOs8nuvQXaR4j4KK5zFLCw4wIJBlFlXqcFaGLmbrNE9f8LRXf4siKzOT79jNjLfim+Z LuGSjhVvdwabm4VwFYAju9zHplNiGaPPkW6qPva8lvjZLQ4T3f1EwXY50jaKenBuy7Av yoiaAJCPc/7mTYJb2KKWFyUI+TeZiXftQJiwxqJeWT1fQKOlGYu/tiQpNyhWtc2sFUJi qaFKu4WvQhG17RbOjuC0Tehj3C026UMPsCQivKfrR+jP30sVnpNYjRZ0blYNMCWTa3Ar 2pDg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ibm.com header.s=pp1 header.b=awlCksOA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id b11si16297370jat.37.2021.05.24.09.17.27; Mon, 24 May 2021 09:17:40 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@ibm.com header.s=pp1 header.b=awlCksOA; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233480AbhEXQRa (ORCPT + 99 others); Mon, 24 May 2021 12:17:30 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:12078 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232918AbhEXQR2 (ORCPT ); Mon, 24 May 2021 12:17:28 -0400 Received: from pps.filterd (m0187473.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 14OG4dm0020170; Mon, 24 May 2021 12:15:58 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=pp1; bh=DrvjMI3EBxdgZsRm5hUVcKMed5KOSzIm0p0poRBgU7I=; b=awlCksOA8wO/oE75Y4b+FA/58Eo419/0EhuYhrubBrec0sL2kvdy6vp0k9s9GwMBkMa6 w5brFjErIdu+bzdLGokSpAOZG9So96atuBCaYZR9nH5x9SezjsMNh+Itb3Qh0iiHn/pR rzJ7sALtFJGRj2Pt37+kHI2YKlMghnxV7SLGHe2SLDMcTyBbuvnrFVAVq23GfDSWyR9K LjELVNO8wxVbFpO0Bkqpm4vSgLXovsIlyRO/Vrm4C3ucHDaVDciwk2vMeS1BDQbxzKe8 M8BJjlArwCUD8CU/F5z56lE733e/SrDomc4eeoEkiigeu5sKpvwLCDyVndwwHNyfNfDv pA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 38repqhkte-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 12:15:58 -0400 Received: from m0187473.ppops.net (m0187473.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 14OG7plf038733; Mon, 24 May 2021 12:15:58 -0400 Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com with ESMTP id 38repqhks5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 12:15:57 -0400 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 14OGBKip016476; Mon, 24 May 2021 16:15:54 GMT Received: from b06cxnps4074.portsmouth.uk.ibm.com (d06relay11.portsmouth.uk.ibm.com [9.149.109.196]) by ppma06fra.de.ibm.com with ESMTP id 38ps7h8fyv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 24 May 2021 16:15:53 +0000 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 14OGFoiV20316452 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 May 2021 16:15:50 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 75CB14203F; Mon, 24 May 2021 16:15:50 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A722A42042; Mon, 24 May 2021 16:15:49 +0000 (GMT) Received: from li-e979b1cc-23ba-11b2-a85c-dfd230f6cf82 (unknown [9.171.37.230]) by d06av24.portsmouth.uk.ibm.com (Postfix) with SMTP; Mon, 24 May 2021 16:15:49 +0000 (GMT) Date: Mon, 24 May 2021 18:15:48 +0200 From: Halil Pasic To: Tony Krowiak Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, jjherne@linux.ibm.com, freude@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, mjrosato@linux.ibm.com, alex.williamson@redhat.com, kwankhede@nvidia.com, fiuczy@linux.ibm.com Subject: Re: [PATCH v16 06/14] s390/vfio-ap: refresh guest's APCB by filtering APQNs assigned to mdev Message-ID: <20210524181548.4dbe52bc.pasic@linux.ibm.com> In-Reply-To: <20210510164423.346858-7-akrowiak@linux.ibm.com> References: <20210510164423.346858-1-akrowiak@linux.ibm.com> <20210510164423.346858-7-akrowiak@linux.ibm.com> Organization: IBM X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: RIR_5a4GtCOQa80qHPekiPEvbcLNYu2E X-Proofpoint-GUID: 7VqVILMie_E9GoIdmJ3Ae-jvQlXJalKg X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-05-24_08:2021-05-24,2021-05-24 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105240096 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 10 May 2021 12:44:15 -0400 Tony Krowiak wrote: > @@ -1601,8 +1676,10 @@ void vfio_ap_mdev_remove_queue(struct ap_device *apdev) > mutex_lock(&matrix_dev->lock); > q = dev_get_drvdata(&apdev->device); > > - if (q->matrix_mdev) > + if (q->matrix_mdev) { > vfio_ap_mdev_unlink_queue_fr_mdev(q); > + vfio_ap_mdev_refresh_apcb(q->matrix_mdev); > + } > > vfio_ap_mdev_reset_queue(q, 1); > dev_set_drvdata(&apdev->device, NULL); At this point we don't know if !!kvm_busy or kvm_busy AFAICT. If !!kvm_busy, then we may end up changing a shadow_apcb while an other thread is in the middle of committing it to the SD satellite. That would be no good. Regards, Halil