From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C9B5C43381 for ; Thu, 14 Feb 2019 13:52:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A5D9222D4 for ; Thu, 14 Feb 2019 13:52:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2407191AbfBNNwL (ORCPT ); Thu, 14 Feb 2019 08:52:11 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47952 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407118AbfBNNvZ (ORCPT ); Thu, 14 Feb 2019 08:51:25 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x1EDiSJP113084 for ; Thu, 14 Feb 2019 08:51:25 -0500 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qn94b1wt1-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 14 Feb 2019 08:51:24 -0500 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 14 Feb 2019 13:51:19 -0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x1EDpITi8323558 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 14 Feb 2019 13:51:18 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0635D4204B; Thu, 14 Feb 2019 13:51:18 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D3B042049; Thu, 14 Feb 2019 13:51:17 +0000 (GMT) Received: from morel-ThinkPad-W530.boeblingen.de.ibm.com (unknown [9.152.224.140]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 14 Feb 2019 13:51:17 +0000 (GMT) From: Pierre Morel To: borntraeger@de.ibm.com Cc: alex.williamson@redhat.com, cohuck@redhat.com, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, frankja@linux.ibm.com, akrowiak@linux.ibm.com, pasic@linux.ibm.com, david@redhat.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, freude@linux.ibm.com, mimu@linux.ibm.com Subject: [PATCH v3 5/9] s390: ap: tools to associate a queue to a matrix Date: Thu, 14 Feb 2019 14:51:05 +0100 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1550152269-6317-1-git-send-email-pmorel@linux.ibm.com> References: <1550152269-6317-1-git-send-email-pmorel@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19021413-0028-0000-0000-000003488C91 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19021413-0029-0000-0000-00002406B878 Message-Id: <1550152269-6317-6-git-send-email-pmorel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-02-14_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1902140098 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We need tools to associate a queue and a matrix to be able later to find the matrix associated with the queue for which we got the APQN in the register 1 during a PQAP/AQIC instruction interception. Signed-off-by: Pierre Morel --- drivers/s390/crypto/vfio_ap_ops.c | 66 +++++++++++++++++++++++++++++++++-- drivers/s390/crypto/vfio_ap_private.h | 1 + 2 files changed, 64 insertions(+), 3 deletions(-) diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c index 2a52c9b..1851b24 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -50,8 +50,7 @@ static int vfio_ap_check_apqn(struct device *dev, void *data) * * Returns the pointer to the associated vfio_ap_queue */ -static __attribute__((unused)) - struct vfio_ap_queue *vfio_ap_get_queue(int apqn) +static struct vfio_ap_queue *vfio_ap_get_queue(int apqn) { struct device *dev; struct vfio_ap_queue *q; @@ -72,7 +71,7 @@ static __attribute__((unused)) * put the associated device * */ -static __attribute__((unused)) void vfio_ap_put_queue(struct vfio_ap_queue *q) +static void vfio_ap_put_queue(struct vfio_ap_queue *q) { put_device(q->dev); q->dev = NULL; @@ -867,6 +866,67 @@ static int vfio_ap_mdev_reset_queue(unsigned int apid, unsigned int apqi, return -EBUSY; } +/** + * vfio_ap_dissociate_queues: Dissociate a matrix mediated device to a queue + * + * Go through all bits in the AQM and APM and dissociate the queue + * from the matrix device. + * + * No return value we are throwing the mediated device anyway. + */ +static void vfio_ap_dissociate_queues(struct ap_matrix_mdev *matrix_mdev) +{ + unsigned long apid, apqi; + struct vfio_ap_queue *q; + + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, + matrix_mdev->matrix.apm_max + 1) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, + matrix_mdev->matrix.aqm_max + 1) { + q = vfio_ap_get_queue(AP_MKQID(apid, apqi)); + if (q) { + vfio_ap_mdev_reset_queue(apid, apqi, 1); + q->matrix = NULL; + vfio_ap_put_queue(q); + } else + pr_err("%s: no queue for %02lx.%04lx\n", + __func__, apid, apqi); + } + } +} + +/** + * vfio_ap_associate_queues: Associate a matrix mediated device to a queue + * + * Go through all bits in the AQM and APM and calculate the APQN, and find + * the matching queue to associate with the matrix device. + * + * In the case a queue could not be found return -ENODEV. + * Otherwise return 0. + */ +static __attribute__((unused)) + int vfio_ap_associate_queues(struct ap_matrix_mdev *matrix_mdev) +{ + unsigned long apid, apqi; + struct vfio_ap_queue *q; + + for_each_set_bit_inv(apid, matrix_mdev->matrix.apm, + matrix_mdev->matrix.apm_max + 1) { + for_each_set_bit_inv(apqi, matrix_mdev->matrix.aqm, + matrix_mdev->matrix.aqm_max + 1) { + q = vfio_ap_get_queue(AP_MKQID(apid, apqi)); + if (!q) + goto error; + q->matrix = matrix_mdev; + vfio_ap_put_queue(q); + } + } + return 0; +error: + pr_err("%s: no queue for %02lx.%04lx\n", __func__, apid, apqi); + vfio_ap_dissociate_queues(matrix_mdev); + return -ENODEV; +} static int vfio_ap_mdev_reset_queues(struct mdev_device *mdev) { int ret; diff --git a/drivers/s390/crypto/vfio_ap_private.h b/drivers/s390/crypto/vfio_ap_private.h index 081f0d7..10bc8b5 100644 --- a/drivers/s390/crypto/vfio_ap_private.h +++ b/drivers/s390/crypto/vfio_ap_private.h @@ -89,5 +89,6 @@ extern void vfio_ap_mdev_unregister(void); struct vfio_ap_queue { struct device *dev; int apqn; + struct ap_matrix_mdev *matrix; }; #endif /* _VFIO_AP_PRIVATE_H_ */ -- 2.7.4