From patchwork Mon May 15 09:15:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Schnelle X-Patchwork-Id: 13241018 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E66FC7EE22 for ; Mon, 15 May 2023 09:22:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240214AbjEOJWe (ORCPT ); Mon, 15 May 2023 05:22:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234035AbjEOJV7 (ORCPT ); Mon, 15 May 2023 05:21:59 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DCFD35B5; Mon, 15 May 2023 02:17:18 -0700 (PDT) Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34F9908n021216; Mon, 15 May 2023 09:16:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=pp1; bh=rodPNwLfHsIuiQQiFeOVrCe92jgLqk9u0QoV1c2yRD8=; b=Ip4Kk6KLTgQeDyCln7BamdjEMifcHiU5FrAfDKQeXr6lMt5S8J2khv2ssn1+JwLWthwU o+oOiby+XTHcjPnAwXEis4CNewl9KkMgDNnesWFZTHwT1Sz0jIjXwPIfK7SYCzMivx3a wEtLX2iCBuSZiE/m+f8PAa4wPG6V4aVbbn7/w/0/O1rxr0kGLJF0iA87u5a+ax70r/kE fRmJAcBPcFBQC+tbp8z3qpL69HuFqjOZPsHAAhI4QTkx+lHZy/Es5oC8KSglASiQ81U1 tNRc2K87KAVRQTBb1F+3QYxpk6EG3ohDGeyDRpaYayorjgNwLVlwSTjiWDszaMDtt0s/ rg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qkg78k3f3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 May 2023 09:16:33 +0000 Received: from m0356517.ppops.net (m0356517.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 34F9G7YK013166; Mon, 15 May 2023 09:16:29 GMT Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3qkg78k38w-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 May 2023 09:16:29 +0000 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 34F97tbJ009450; Mon, 15 May 2023 09:16:20 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma02fra.de.ibm.com (PPS) with ESMTPS id 3qj264rt8s-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 15 May 2023 09:16:20 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 34F9GGK651184124 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 15 May 2023 09:16:16 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C8BD020040; Mon, 15 May 2023 09:16:16 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E7F0A2004E; Mon, 15 May 2023 09:16:15 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 15 May 2023 09:16:15 +0000 (GMT) From: Niklas Schnelle Date: Mon, 15 May 2023 11:15:53 +0200 Subject: [PATCH v9 3/6] s390/pci: prepare is_passed_through() for dma-iommu MIME-Version: 1.0 Message-Id: <20230310-dma_iommu-v9-3-65bb8edd2beb@linux.ibm.com> References: <20230310-dma_iommu-v9-0-65bb8edd2beb@linux.ibm.com> In-Reply-To: <20230310-dma_iommu-v9-0-65bb8edd2beb@linux.ibm.com> To: Joerg Roedel , Matthew Rosato , Will Deacon , Wenjia Zhang , Robin Murphy , Jason Gunthorpe Cc: Gerd Bayer , Julian Ruess , Pierre Morel , Alexandra Winter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Suravee Suthikulpanit , Hector Martin , Sven Peter , Alyssa Rosenzweig , David Woodhouse , Lu Baolu , Andy Gross , Bjorn Andersson , Konrad Dybcio , Yong Wu , Matthias Brugger , AngeloGioacchino Del Regno , Gerald Schaefer , Orson Zhai , Baolin Wang , Chunyan Zhang , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Thierry Reding , Krishna Reddy , Jonathan Hunter , Niklas Schnelle , Jonathan Corbet , linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, linux-doc@vger.kernel.org X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1902; i=schnelle@linux.ibm.com; h=from:subject:message-id; bh=JnpBPtIA02SvkModRZiVKujLXSYwAXU0tTNoKrRKqJY=; b=owGbwMvMwCH2Wz534YHOJ2GMp9WSGFISf0RNE3DSWbUtwTI/6fKHVP5NYZuupLbZ77jzbtpBz 4ufCsNiO0pZGMQ4GGTFFFkWdTn7rSuYYronqL8DZg4rE8gQBi5OAZhIxlmG/+4vL59dGfTYl/GA 45Oa9F69EKfdHw9VV37717Zvcjyv+3GGf9acy2fnbEjzsu6WSprM8Nv8WURwyYL1ukJLBT/f9Vv xgBkA X-Developer-Key: i=schnelle@linux.ibm.com; a=openpgp; fpr=9DB000B2D2752030A5F72DDCAFE43F15E8C26090 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: n6Hf-MCaUSzMZVFFH4ZkAQGIN2BF4c-E X-Proofpoint-ORIG-GUID: z9QuOV8xCrXzlc97SDldpzRutquerwCA X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-15_06,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 impostorscore=0 mlxscore=0 clxscore=1015 malwarescore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 mlxlogscore=999 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305150078 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org With the IOMMU always controlled through the IOMMU driver testing for zdev->s390_domain is not a valid indication of the device being passed-through. Instead test if zdev->kzdev is set. Reviewed-by: Pierre Morel Reviewed-by: Matthew Rosato Signed-off-by: Niklas Schnelle --- arch/s390/pci/pci_event.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c index b9324ca2eb94..4ef5a6a1d618 100644 --- a/arch/s390/pci/pci_event.c +++ b/arch/s390/pci/pci_event.c @@ -59,9 +59,16 @@ static inline bool ers_result_indicates_abort(pci_ers_result_t ers_res) } } -static bool is_passed_through(struct zpci_dev *zdev) +static bool is_passed_through(struct pci_dev *pdev) { - return zdev->s390_domain; + struct zpci_dev *zdev = to_zpci(pdev); + bool ret; + + mutex_lock(&zdev->kzdev_lock); + ret = !!zdev->kzdev; + mutex_unlock(&zdev->kzdev_lock); + + return ret; } static bool is_driver_supported(struct pci_driver *driver) @@ -176,7 +183,7 @@ static pci_ers_result_t zpci_event_attempt_error_recovery(struct pci_dev *pdev) } pdev->error_state = pci_channel_io_frozen; - if (is_passed_through(to_zpci(pdev))) { + if (is_passed_through(pdev)) { pr_info("%s: Cannot be recovered in the host because it is a pass-through device\n", pci_name(pdev)); goto out_unlock; @@ -239,7 +246,7 @@ static void zpci_event_io_failure(struct pci_dev *pdev, pci_channel_state_t es) * we will inject the error event and let the guest recover the device * itself. */ - if (is_passed_through(to_zpci(pdev))) + if (is_passed_through(pdev)) goto out; driver = to_pci_driver(pdev->dev.driver); if (driver && driver->err_handler && driver->err_handler->error_detected)