From patchwork Mon Feb 29 15:32:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 8455191 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 820B2C0553 for ; Mon, 29 Feb 2016 15:33:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E0B7A201BC for ; Mon, 29 Feb 2016 15:33:13 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 335912015E for ; Mon, 29 Feb 2016 15:33:13 +0000 (UTC) Received: from localhost ([::1]:37261 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaPou-0007Jo-KU for patchwork-qemu-devel@patchwork.kernel.org; Mon, 29 Feb 2016 10:33:12 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57354) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaPoj-0007J7-9F for qemu-devel@nongnu.org; Mon, 29 Feb 2016 10:33:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aaPod-0003tz-Ic for qemu-devel@nongnu.org; Mon, 29 Feb 2016 10:33:01 -0500 Received: from e06smtp15.uk.ibm.com ([195.75.94.111]:34627) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aaPod-0003tr-9d for qemu-devel@nongnu.org; Mon, 29 Feb 2016 10:32:55 -0500 Received: from localhost by e06smtp15.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 29 Feb 2016 15:32:54 -0000 Received: from d06dlp03.portsmouth.uk.ibm.com (9.149.20.15) by e06smtp15.uk.ibm.com (192.168.101.145) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Mon, 29 Feb 2016 15:32:51 -0000 X-IBM-Helo: d06dlp03.portsmouth.uk.ibm.com X-IBM-MailFrom: cornelia.huck@de.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id 149F21B0806B for ; Mon, 29 Feb 2016 15:33:13 +0000 (GMT) Received: from d06av03.portsmouth.uk.ibm.com (d06av03.portsmouth.uk.ibm.com [9.149.37.213]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u1TFWphq59375664 for ; Mon, 29 Feb 2016 15:32:51 GMT Received: from d06av03.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u1TFWnsh004515 for ; Mon, 29 Feb 2016 08:32:50 -0700 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-197.boeblingen.de.ibm.com [9.152.224.197]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u1TFWmr6004439 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 29 Feb 2016 08:32:49 -0700 From: Cornelia Huck To: qemu-devel@nongnu.org Date: Mon, 29 Feb 2016 16:32:42 +0100 Message-Id: <1456759962-20548-1-git-send-email-cornelia.huck@de.ibm.com> X-Mailer: git-send-email 2.7.2 In-Reply-To: <20160229163112.73085e75.cornelia.huck@de.ibm.com> References: <20160229163112.73085e75.cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16022915-0021-0000-0000-000020574AD7 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 195.75.94.111 Cc: Cornelia Huck , borntraeger@de.ibm.com, jfrei@linux.vnet.ibm.com, agraf@suse.de Subject: [Qemu-devel] [PATCH] s390x/css: only suspend when enabled by orb X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We must not allow a channel program to suspend if the suspend control bit in the orb had not been specified. Reviewed-by: Halil Pasic Signed-off-by: Cornelia Huck --- hw/s390x/css.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 55cb26a..3a1d919 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -342,7 +342,8 @@ static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1) return ret; } -static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr) +static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr, + bool suspend_allowed) { int ret; bool check_len; @@ -370,7 +371,7 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr) } if (ccw.flags & CCW_FLAG_SUSPEND) { - return -EINPROGRESS; + return suspend_allowed ? -EINPROGRESS : -EINVAL; } check_len = !((ccw.flags & CCW_FLAG_SLI) && !(ccw.flags & CCW_FLAG_DC)); @@ -468,6 +469,7 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb) SCSW *s = &sch->curr_status.scsw; int path; int ret; + bool suspend_allowed; /* Path management: In our simple css, we always choose the only path. */ path = 0x80; @@ -487,12 +489,15 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb) } sch->ccw_fmt_1 = !!(orb->ctrl0 & ORB_CTRL0_MASK_FMT); sch->ccw_no_data_cnt = 0; + suspend_allowed = !!(orb->ctrl0 & ORB_CTRL0_MASK_SPND); } else { s->ctrl &= ~(SCSW_ACTL_SUSP | SCSW_ACTL_RESUME_PEND); + /* The channel program had been suspended before. */ + suspend_allowed = true; } sch->last_cmd_valid = false; do { - ret = css_interpret_ccw(sch, sch->channel_prog); + ret = css_interpret_ccw(sch, sch->channel_prog, suspend_allowed); switch (ret) { case -EAGAIN: /* ccw chain, continue processing */