From patchwork Wed Aug 30 16:36:07 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Halil Pasic X-Patchwork-Id: 9930191 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 7FF9B60380 for ; Wed, 30 Aug 2017 16:43:40 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 721B22852C for ; Wed, 30 Aug 2017 16:43:40 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 66948285E6; Wed, 30 Aug 2017 16:43:40 +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 C4BFB2852C for ; Wed, 30 Aug 2017 16:43:39 +0000 (UTC) Received: from localhost ([::1]:51565 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dn65a-0003sy-KL for patchwork-qemu-devel@patchwork.kernel.org; Wed, 30 Aug 2017 12:43:38 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50200) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dn5ym-0007I2-70 for qemu-devel@nongnu.org; Wed, 30 Aug 2017 12:36:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dn5yj-0006JD-1H for qemu-devel@nongnu.org; Wed, 30 Aug 2017 12:36:36 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:44875 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 1dn5yi-0006It-SF for qemu-devel@nongnu.org; Wed, 30 Aug 2017 12:36:32 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v7UGT9OY033495 for ; Wed, 30 Aug 2017 12:36:32 -0400 Received: from e06smtp13.uk.ibm.com (e06smtp13.uk.ibm.com [195.75.94.109]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cnxcqv6jp-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 30 Aug 2017 12:36:31 -0400 Received: from localhost by e06smtp13.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 30 Aug 2017 17:36:29 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v7UGaSkj27066592; Wed, 30 Aug 2017 16:36:28 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4783052041; Wed, 30 Aug 2017 16:31:55 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTPS id 122A85203F; Wed, 30 Aug 2017 16:31:55 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Wed, 30 Aug 2017 18:36:07 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170830163609.50260-1-pasic@linux.vnet.ibm.com> References: <20170830163609.50260-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17083016-0012-0000-0000-000005737A46 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17083016-0013-0000-0000-000018EB9D25 Message-Id: <20170830163609.50260-8-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-08-30_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-1708300251 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 7/9] 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: Dong Jia Shi , 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 handler avoiding arbitrary and cryptic error codes being mapped to what a subchannel is supposed to do. Let the code detecting the condition tell how it's to be handled in a less ambiguous way. Signed-off-by: Halil Pasic Reviewed-by: Pierre Morel --- hw/s390x/css.c | 19 +++++++------------ include/hw/s390x/css.h | 2 +- target/s390x/ioinst.c | 27 +++++++++------------------ 3 files changed, 17 insertions(+), 31 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index e661a87387..eff1b91a8c 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -1289,28 +1289,27 @@ void css_do_csch(SubchDev *sch) do_subchannel_work(sch); } -int css_do_hsch(SubchDev *sch) +void 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; + sch->iret.cc = 3; + return; } 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; + sch->iret.cc = 1; + return; } if (s->ctrl & (SCSW_FCTL_HALT_FUNC | SCSW_FCTL_CLEAR_FUNC)) { - ret = -EBUSY; - goto out; + sch->iret.cc = 2; + return; } /* Trigger the halt function. */ @@ -1324,10 +1323,6 @@ int css_do_hsch(SubchDev *sch) s->ctrl |= SCSW_ACTL_HALT_PEND; do_subchannel_work(sch); - ret = 0; - -out: - return ret; } static void css_update_chnmon(SubchDev *sch) diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index d5a7e460ec..d8d949da4f 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -206,7 +206,7 @@ bool css_schid_final(int m, uint8_t cssid, uint8_t ssid, uint16_t schid); int css_do_msch(SubchDev *sch, const SCHIB *schib); void css_do_xsch(SubchDev *sch); void css_do_csch(SubchDev *sch); -int css_do_hsch(SubchDev *sch); +void css_do_hsch(SubchDev *sch); void 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 501f3135ad..e91788d586 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -89,8 +89,6 @@ 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); @@ -98,24 +96,17 @@ 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); + if (!sch || !css_subch_visible(sch)) { + setcc(cpu, 3); + return; } - switch (ret) { - case -ENODEV: - cc = 3; - break; - case -EBUSY: - cc = 2; - break; - case 0: - cc = 0; - break; - default: - cc = 1; - break; + css_subch_clear_iret(sch); + css_do_hsch(sch); + if (sch->iret.pgm_chk) { + program_interrupt(&cpu->env, sch->iret.irq_code, 4); + return; } - setcc(cpu, cc); + setcc(cpu, sch->iret.cc); } static int ioinst_schib_valid(SCHIB *schib)