From patchwork Wed Oct 4 15:41:42 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Halil Pasic X-Patchwork-Id: 9984947 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 CC3F960291 for ; Wed, 4 Oct 2017 15:48:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BEA94281E1 for ; Wed, 4 Oct 2017 15:48:37 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B338428B3E; Wed, 4 Oct 2017 15:48:37 +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 1D5BB281E1 for ; Wed, 4 Oct 2017 15:48:37 +0000 (UTC) Received: from localhost ([::1]:35731 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dzluW-00070y-09 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 04 Oct 2017 11:48:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37210) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dzloN-0002Fi-6p for qemu-devel@nongnu.org; Wed, 04 Oct 2017 11:42:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dzloG-0003Zf-FX for qemu-devel@nongnu.org; Wed, 04 Oct 2017 11:42:15 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:37632 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dzloG-0003Yn-9s for qemu-devel@nongnu.org; Wed, 04 Oct 2017 11:42:08 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v94Fe4lQ083355 for ; Wed, 4 Oct 2017 11:42:00 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2dcxvfp9ya-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 04 Oct 2017 11:42:00 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 4 Oct 2017 16:41:58 +0100 Received: from b06cxnps3075.portsmouth.uk.ibm.com (9.149.109.195) by e06smtp10.uk.ibm.com (192.168.101.140) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Wed, 4 Oct 2017 16:41:55 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v94FftjD28311666; Wed, 4 Oct 2017 15:41:55 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 10B214C044; Wed, 4 Oct 2017 16:38:01 +0100 (BST) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D0E6B4C040; Wed, 4 Oct 2017 16:38:00 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Wed, 4 Oct 2017 16:38:00 +0100 (BST) From: Halil Pasic To: Cornelia Huck , "Dong Jia Shi" Date: Wed, 4 Oct 2017 17:41:42 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20171004154144.88995-1-pasic@linux.vnet.ibm.com> References: <20171004154144.88995-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17100415-0040-0000-0000-000003DF6144 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17100415-0041-0000-0000-000025E0CCA9 Message-Id: <20171004154144.88995-7-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-10-04_07:, , 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=8.0.1-1707230000 definitions=main-1710040220 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v2 6/8] s390x: refactor error handling for HSCH handler 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: Thomas Huth , Halil Pasic , Pierre Morel , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Simplify the error handling of the HSCH. Let the code detecting the condition tell (in a less ambiguous way) how it's to be handled. No changes in behavior. Signed-off-by: Halil Pasic --- hw/s390x/css.c | 18 +++++------------- include/hw/s390x/css.h | 2 +- target/s390x/ioinst.c | 23 ++++------------------- 3 files changed, 10 insertions(+), 33 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 1839f40408..6da3e4ea61 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -1272,28 +1272,24 @@ IOInstEnding css_do_csch(SubchDev *sch) return do_subchannel_work(sch); } -int css_do_hsch(SubchDev *sch) +IOInstEnding css_do_hsch(SubchDev *sch) { SCSW *s = &sch->curr_status.scsw; PMCW *p = &sch->curr_status.pmcw; - int ret; if (~(p->flags) & (PMCW_FLAGS_MASK_DNV | PMCW_FLAGS_MASK_ENA)) { - ret = -ENODEV; - goto out; + return (IOInstEnding){.cc = 3}; } if (((s->ctrl & SCSW_CTRL_MASK_STCTL) == SCSW_STCTL_STATUS_PEND) || (s->ctrl & (SCSW_STCTL_PRIMARY | SCSW_STCTL_SECONDARY | SCSW_STCTL_ALERT))) { - ret = -EINPROGRESS; - goto out; + return (IOInstEnding){.cc = 1}; } if (s->ctrl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) { - ret = -EBUSY; - goto out; + return (IOInstEnding){.cc = 2}; } /* Trigger the halt function. */ @@ -1306,11 +1302,7 @@ int css_do_hsch(SubchDev *sch) } s->ctrl |= SCSW_ACTL_HALT_PEND; - do_subchannel_work(sch); - ret = 0; - -out: - return ret; + return do_subchannel_work(sch); } static void css_update_chnmon(SubchDev *sch) diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index 6ca9999077..a4064711e2 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -214,7 +214,7 @@ bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); int css_do_msch(SubchDev *sch, const SCHIB *schib); IOInstEnding css_do_xsch(SubchDev *sch); IOInstEnding css_do_csch(SubchDev *sch); -int css_do_hsch(SubchDev *sch); +IOInstEnding css_do_hsch(SubchDev *sch); IOInstEnding css_do_ssch(SubchDev *sch, ORB *orb); int css_do_tsch_get_irb(SubchDev *sch, IRB *irb, int *irb_len); void css_do_tsch_update_subch(SubchDev *sch); diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index b12b3d1d41..12102bab0f 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -78,8 +78,6 @@ void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1) { int cssid, ssid, schid, m; SubchDev *sch; - int ret = -ENODEV; - int cc; if (ioinst_disassemble_sch_ident(reg1, &m, &cssid, &ssid, &schid)) { program_interrupt(&cpu->env, PGM_OPERAND, 4); @@ -87,24 +85,11 @@ void ioinst_handle_hsch(S390CPU *cpu, uint64_t reg1) } trace_ioinst_sch_id("hsch", cssid, ssid, schid); sch = css_find_subch(m, cssid, ssid, schid); - if (sch && css_subch_visible(sch)) { - ret = css_do_hsch(sch); - } - switch (ret) { - case -ENODEV: - cc = 3; - break; - case -EBUSY: - cc = 2; - break; - case 0: - cc = 0; - break; - default: - cc = 1; - break; + if (!sch || !css_subch_visible(sch)) { + setcc(cpu, 3); + return; } - setcc(cpu, cc); + setcc(cpu, css_do_hsch(sch).cc); } static int ioinst_schib_valid(SCHIB *schib)