From patchwork Tue Sep 27 11:48:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Borntraeger X-Patchwork-Id: 9351733 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id B3F8F600CB for ; Tue, 27 Sep 2016 11:49:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A270C291B6 for ; Tue, 27 Sep 2016 11:49:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 95605291BA; Tue, 27 Sep 2016 11:49:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7DDB3291B6 for ; Tue, 27 Sep 2016 11:49:04 +0000 (UTC) Received: from localhost ([::1]:50015 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boqsh-0001mS-AR for patchwork-qemu-devel@patchwork.kernel.org; Tue, 27 Sep 2016 07:49:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49799) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boqs7-0001iQ-6V for qemu-devel@nongnu.org; Tue, 27 Sep 2016 07:48:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1boqs1-0006Ny-90 for qemu-devel@nongnu.org; Tue, 27 Sep 2016 07:48:26 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:56643 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boqs1-0006Np-39 for qemu-devel@nongnu.org; Tue, 27 Sep 2016 07:48:21 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u8RBlpOM099986 for ; Tue, 27 Sep 2016 07:48:20 -0400 Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) by mx0b-001b2d01.pphosted.com with ESMTP id 25qhfgjneh-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 27 Sep 2016 07:48:20 -0400 Received: from localhost by e06smtp12.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 27 Sep 2016 12:48:16 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id 782EC1B08074 for ; Tue, 27 Sep 2016 12:50:10 +0100 (BST) Received: from d06av01.portsmouth.uk.ibm.com (d06av01.portsmouth.uk.ibm.com [9.149.37.212]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u8RBmGHI14156244 for ; Tue, 27 Sep 2016 11:48:16 GMT Received: from d06av01.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av01.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u8RBmF6p018447 for ; Tue, 27 Sep 2016 05:48:16 -0600 Received: from tuxmaker.boeblingen.de.ibm.com (tuxmaker.boeblingen.de.ibm.com [9.152.85.9]) by d06av01.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u8RBmFd2018419 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 27 Sep 2016 05:48:15 -0600 Received: by tuxmaker.boeblingen.de.ibm.com (Postfix, from userid 25651) id 8467420F0F8; Tue, 27 Sep 2016 13:48:15 +0200 (CEST) From: Christian Borntraeger To: qemu-devel Date: Tue, 27 Sep 2016 13:48:34 +0200 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1474976917-102710-1-git-send-email-borntraeger@de.ibm.com> References: <1474976917-102710-1-git-send-email-borntraeger@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16092711-0008-0000-0000-000002D34BD3 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16092711-0009-0000-0000-00001A1E7D20 Message-Id: <1474976917-102710-6-git-send-email-borntraeger@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-09-27_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609020000 definitions=main-1609270217 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH 5/8] pc-bios/s390-ccw: enable subchannel for IPL I/O devices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Halil Pasic , Alexander Graf , Christian Borntraeger , Jens Freimann , Cornelia Huck , Dong Jia Shi Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Dong Jia Shi IPL should cause the IPL I/O device to become enabled. So when handling the IPL program, we should set the E (Enable) bit. However, virtio-ccw does not know whether it's dealing with an IPL device or not. Since trying to perform I/O on a disabled device doesn't make any sense, let's just always enable it. At the same time we can remove the SCSW_FCTL_START_FUNC flag as it is ignored for msch anyway and did not enable the device as intended. Reported-by: Farhan Ali Signed-off-by: Dong Jia Shi Reviewed-by: Cornelia Huck Reviewed-by: Sascha Silbe Signed-off-by: Halil Pasic [remove superfluous flag] Signed-off-by: Christian Borntraeger --- pc-bios/s390-ccw/virtio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c index 1d34e8c..b333734 100644 --- a/pc-bios/s390-ccw/virtio.c +++ b/pc-bios/s390-ccw/virtio.c @@ -97,7 +97,8 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int len) /* start command processing */ stsch_err(vdev->schid, &schib); - schib.scsw.ctrl = SCSW_FCTL_START_FUNC; + /* enable the subchannel for IPL device */ + schib.pmcw.ena = 1; msch(vdev->schid, &schib); /* start subchannel command */