From patchwork Wed May 17 00:48:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dong Jia Shi X-Patchwork-Id: 9729863 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 CB66160386 for ; Wed, 17 May 2017 00:50:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BDACA285EE for ; Wed, 17 May 2017 00:50:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B150228618; Wed, 17 May 2017 00:50:41 +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 19BEA285EE for ; Wed, 17 May 2017 00:50:41 +0000 (UTC) Received: from localhost ([::1]:44787 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dAnAm-0003SL-AX for patchwork-qemu-devel@patchwork.kernel.org; Tue, 16 May 2017 20:50:40 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48813) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dAn9E-0003MZ-AL for qemu-devel@nongnu.org; Tue, 16 May 2017 20:49:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dAn9C-0001Tp-SF for qemu-devel@nongnu.org; Tue, 16 May 2017 20:49:04 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:38528) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dAn9C-0001SO-HU for qemu-devel@nongnu.org; Tue, 16 May 2017 20:49:02 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4H0mobJ082242 for ; Tue, 16 May 2017 20:49:01 -0400 Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) by mx0a-001b2d01.pphosted.com with ESMTP id 2ag7ewk7pw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 16 May 2017 20:49:01 -0400 Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 16 May 2017 18:48:58 -0600 Received: from b03ledav006.gho.boulder.ibm.com (b03ledav006.gho.boulder.ibm.com [9.17.130.237]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v4H0mudp8192382; Tue, 16 May 2017 17:48:56 -0700 Received: from b03ledav006.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2C7FCC603E; Tue, 16 May 2017 18:48:56 -0600 (MDT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by b03ledav006.gho.boulder.ibm.com (Postfix) with ESMTP id 72956C6037; Tue, 16 May 2017 18:48:54 -0600 (MDT) From: Dong Jia Shi To: kvm@vger.kernel.org, linux-s390@vger.kernel.org, qemu-devel@nongnu.org Date: Wed, 17 May 2017 02:48:11 +0200 X-Mailer: git-send-email 2.11.2 In-Reply-To: <20170517004813.58227-1-bjsdjshi@linux.vnet.ibm.com> References: <20170517004813.58227-1-bjsdjshi@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17051700-0008-0000-0000-000007D03544 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007074; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000212; SDB=6.00861498; UDB=6.00427297; IPR=6.00641162; BA=6.00005352; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015485; XFM=3.00000015; UTC=2017-05-17 00:49:00 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17051700-0009-0000-0000-0000422DEB5E Message-Id: <20170517004813.58227-12-bjsdjshi@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-16_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=2 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705170006 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH v8 11/13] s390x/css: ccw translation infrastructure 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: eric.auger@redhat.com, borntraeger@de.ibm.com, alex.williamson@redhat.com, Xiao Feng Ren , cornelia.huck@de.ibm.com, bjsdjshi@linux.vnet.ibm.com, agraf@suse.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Xiao Feng Ren Implement a basic infrastructure of handling channel I/O instruction interception for passed through subchannels: 1. Branch the code path of instruction interception handling by SubChannel type. 2. For a passed-through subchannel, issue the ORB to kernel to do ccw translation and perform an I/O operation. 3. Assign different condition code based on the I/O result, or trigger a program check. Signed-off-by: Xiao Feng Ren Signed-off-by: Dong Jia Shi --- hw/s390x/css.c | 89 ++++++++++++++++++++++++++++++++++++++++++++++---- hw/s390x/s390-ccw.c | 12 +++++++ hw/s390x/virtio-ccw.c | 1 + include/hw/s390x/css.h | 4 +++ target/s390x/ioinst.c | 9 +++++ 5 files changed, 109 insertions(+), 6 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 462a768f9e..1e2f26b65a 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -524,7 +524,7 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr, return ret; } -static void sch_handle_start_func(SubchDev *sch, ORB *orb) +static void sch_handle_start_func_virtual(SubchDev *sch, ORB *orb) { PMCW *p = &sch->curr_status.pmcw; @@ -626,13 +626,58 @@ static void sch_handle_start_func(SubchDev *sch, ORB *orb) } +static int sch_handle_start_func_passthrough(SubchDev *sch, ORB *orb) +{ + + PMCW *p = &sch->curr_status.pmcw; + SCSW *s = &sch->curr_status.scsw; + int ret; + + if (!(s->ctrl & SCSW_ACTL_SUSP)) { + assert(orb != NULL); + p->intparm = orb->intparm; + } + + /* + * Only support prefetch enable mode. + * Only support 64bit addressing idal. + */ + if (!(orb->ctrl0 & ORB_CTRL0_MASK_PFCH) || + !(orb->ctrl0 & ORB_CTRL0_MASK_C64)) { + return -EINVAL; + } + + ret = s390_ccw_cmd_request(orb, s, sch->driver_data); + switch (ret) { + /* Currently we don't update control block and just return the cc code. */ + case 0: + break; + case -EBUSY: + break; + case -ENODEV: + break; + case -EACCES: + /* Let's reflect an inaccessible host device by cc 3. */ + ret = -ENODEV; + break; + default: + /* + * All other return codes will trigger a program check, + * or set cc to 1. + */ + break; + }; + + return ret; +} + /* * On real machines, this would run asynchronously to the main vcpus. * We might want to make some parts of the ssch handling (interpreting * read/writes) asynchronous later on if we start supporting more than * our current very simple devices. */ -static void do_subchannel_work(SubchDev *sch, ORB *orb) +int do_subchannel_work_virtual(SubchDev *sch, ORB *orb) { SCSW *s = &sch->curr_status.scsw; @@ -643,12 +688,45 @@ static void do_subchannel_work(SubchDev *sch, ORB *orb) sch_handle_halt_func(sch); } else if (s->ctrl & SCSW_FCTL_START_FUNC) { /* Triggered by both ssch and rsch. */ - sch_handle_start_func(sch, orb); + sch_handle_start_func_virtual(sch, orb); } else { /* Cannot happen. */ - return; + return 0; } css_inject_io_interrupt(sch); + return 0; +} + +int do_subchannel_work_passthrough(SubchDev *sch, ORB *orb) +{ + int ret; + SCSW *s = &sch->curr_status.scsw; + + if (s->ctrl & SCSW_FCTL_CLEAR_FUNC) { + /* TODO: Clear handling */ + sch_handle_clear_func(sch); + ret = 0; + } else if (s->ctrl & SCSW_FCTL_HALT_FUNC) { + /* TODO: Halt handling */ + sch_handle_halt_func(sch); + ret = 0; + } else if (s->ctrl & SCSW_FCTL_START_FUNC) { + ret = sch_handle_start_func_passthrough(sch, orb); + } else { + /* Cannot happen. */ + return -ENODEV; + } + + return ret; +} + +static int do_subchannel_work(SubchDev *sch, ORB *orb) +{ + if (sch->do_subchannel_work) { + return sch->do_subchannel_work(sch, orb); + } else { + return -EINVAL; + } } static void copy_pmcw_to_guest(PMCW *dest, const PMCW *src) @@ -967,8 +1045,7 @@ int css_do_ssch(SubchDev *sch, ORB *orb) s->ctrl |= (SCSW_FCTL_START_FUNC | SCSW_ACTL_START_PEND); s->flags &= ~SCSW_FLAGS_MASK_PNO; - do_subchannel_work(sch, orb); - ret = 0; + ret = do_subchannel_work(sch, orb); out: return ret; diff --git a/hw/s390x/s390-ccw.c b/hw/s390x/s390-ccw.c index e2b1973fda..8614dda6f8 100644 --- a/hw/s390x/s390-ccw.c +++ b/hw/s390x/s390-ccw.c @@ -18,6 +18,17 @@ #include "hw/s390x/css-bridge.h" #include "hw/s390x/s390-ccw.h" +int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data) +{ + S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(data); + + if (cdc->handle_request) { + return cdc->handle_request(orb, scsw, data); + } else { + return -ENOSYS; + } +} + static void s390_ccw_get_dev_info(S390CCWDevice *cdev, char *sysfsdev, Error **errp) @@ -72,6 +83,7 @@ static void s390_ccw_realize(S390CCWDevice *cdev, char *sysfsdev, Error **errp) goto out_mdevid_free; } sch->driver_data = cdev; + sch->do_subchannel_work = do_subchannel_work_passthrough; ccw_dev->sch = sch; ret = css_sch_build_schib(sch, &cdev->hostid); diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 4e386e9781..e6a6f74be3 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -701,6 +701,7 @@ static void virtio_ccw_device_realize(VirtioCcwDevice *dev, Error **errp) sch->disable_cb = virtio_sch_disable_cb; sch->id.reserved = 0xff; sch->id.cu_type = VIRTIO_CCW_CU_TYPE; + sch->do_subchannel_work = do_subchannel_work_virtual; ccw_dev->sch = sch; dev->indicators = NULL; dev->revision = -1; diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index a932f91edb..596a2f2ef3 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -91,6 +91,7 @@ struct SubchDev { /* transport-provided data: */ int (*ccw_cb) (SubchDev *, CCW1); void (*disable_cb)(SubchDev *); + int (*do_subchannel_work) (SubchDev *, ORB *); SenseId id; void *driver_data; }; @@ -148,6 +149,9 @@ void css_generate_chp_crws(uint8_t cssid, uint8_t chpid); void css_generate_css_crws(uint8_t cssid); void css_clear_sei_pending(void); void css_adapter_interrupt(uint8_t isc); +int s390_ccw_cmd_request(ORB *orb, SCSW *scsw, void *data); +int do_subchannel_work_virtual(SubchDev *sub, ORB *orb); +int do_subchannel_work_passthrough(SubchDev *sub, ORB *orb); typedef enum { CSS_IO_ADAPTER_VIRTIO = 0, diff --git a/target/s390x/ioinst.c b/target/s390x/ioinst.c index 590bfa4f12..62a777100c 100644 --- a/target/s390x/ioinst.c +++ b/target/s390x/ioinst.c @@ -244,6 +244,15 @@ void ioinst_handle_ssch(S390CPU *cpu, uint64_t reg1, uint32_t ipb) case -EBUSY: cc = 2; break; + case -EFAULT: + /* + * TODO: + * I'm wondering whether there is something better + * to do for us here (like setting some device or + * subchannel status). + */ + program_interrupt(env, PGM_ADDRESSING, 4); + return; case 0: cc = 0; break;