From nobody Mon Apr 29 09:49:23 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505845775762738.7879242476897; Tue, 19 Sep 2017 11:29:35 -0700 (PDT) Received: from localhost ([::1]:44770 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNH4-0004lZ-Sk for importer@patchew.org; Tue, 19 Sep 2017 14:29:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53041) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNFY-0003nE-B9 for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duNFT-0002GO-A3 for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:00 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36008 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 1duNFT-0002FX-3n for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:27:55 -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 v8JIOG8a030304 for ; Tue, 19 Sep 2017 14:27:53 -0400 Received: from e06smtp14.uk.ibm.com (e06smtp14.uk.ibm.com [195.75.94.110]) by mx0b-001b2d01.pphosted.com with ESMTP id 2d35nf2fc2-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 19 Sep 2017 14:27:53 -0400 Received: from localhost by e06smtp14.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 19 Sep 2017 19:27:49 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8JIRm6Y19661012; Tue, 19 Sep 2017 18:27:48 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C3A4C42041; Tue, 19 Sep 2017 19:24:00 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 953304203F; Tue, 19 Sep 2017 19:24:00 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 19 Sep 2017 19:24:00 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Tue, 19 Sep 2017 20:27:41 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> References: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17091918-0016-0000-0000-000004EE7468 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091918-0017-0000-0000-00002828A8F6 Message-Id: <20170919182745.90280-2-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-19_08:, , 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-1709190256 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 v3 1/5] s390x/css: introduce css data stream 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This is a preparation for introducing handling for indirect data addressing and modified indirect data addressing (CCW). Here we introduce an interface which should make the addressing scheme transparent for the client code. Here we implement only the basic scheme (no IDA or MIDA). Signed-off-by: Halil Pasic Reviewed-by: Dong Jia Shi Reviewed-by: Pierre Morel --- hw/s390x/css.c | 55 +++++++++++++++++++++++++++++++++++++++++ include/hw/s390x/css.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++= ++++ 2 files changed, 122 insertions(+) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 901dc6a0f3..e8d2016563 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -783,6 +783,61 @@ static CCW1 copy_ccw_from_guest(hwaddr addr, bool fmt1) } return ret; } +/** + * If out of bounds marks the stream broken. If broken returns -EINVAL, + * otherwise the requested length (may be zero) + */ +static inline int cds_check_len(CcwDataStream *cds, int len) +{ + if (cds->at_byte + len > cds->count) { + cds->flags |=3D CDS_F_STREAM_BROKEN; + } + return cds->flags & CDS_F_STREAM_BROKEN ? -EINVAL : len; +} + +static int ccw_dstream_rw_noflags(CcwDataStream *cds, void *buff, int len, + CcwDataStreamOp op) +{ + int ret; + + ret =3D cds_check_len(cds, len); + if (ret <=3D 0) { + return ret; + } + if (op =3D=3D CDS_OP_A) { + goto incr; + } + ret =3D address_space_rw(&address_space_memory, cds->cda, + MEMTXATTRS_UNSPECIFIED, buff, len, op); + if (ret !=3D MEMTX_OK) { + cds->flags |=3D CDS_F_STREAM_BROKEN; + return -EINVAL; + } +incr: + cds->at_byte +=3D len; + cds->cda +=3D len; + return 0; +} + +void ccw_dstream_init(CcwDataStream *cds, CCW1 const *ccw, ORB const *orb) +{ + /* + * We don't support MIDA (an optional facility) yet and we + * catch this earlier. Just for expressing the precondition. + */ + g_assert(!(orb->ctrl1 & ORB_CTRL1_MASK_MIDAW)); + cds->flags =3D (orb->ctrl0 & ORB_CTRL0_MASK_I2K ? CDS_F_I2K : 0) | + (orb->ctrl0 & ORB_CTRL0_MASK_C64 ? CDS_F_C64 : 0) | + (ccw->flags & CCW_FLAG_IDA ? CDS_F_IDA : 0); + cds->count =3D ccw->count; + cds->cda_orig =3D ccw->cda; + ccw_dstream_rewind(cds); + if (!(cds->flags & CDS_F_IDA)) { + cds->op_handler =3D ccw_dstream_rw_noflags; + } else { + assert(false); + } +} =20 static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_addr, bool suspend_allowed) diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index 0653d3c9be..078356e94c 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -75,6 +75,29 @@ typedef struct CMBE { uint32_t reserved[7]; } QEMU_PACKED CMBE; =20 +typedef enum CcwDataStreamOp { + CDS_OP_R =3D 0, /* read, false when used as is_write */ + CDS_OP_W =3D 1, /* write, true when used as is_write */ + CDS_OP_A =3D 2 /* advance, should not be used as is_write */ +} CcwDataStreamOp; + +/* normal usage is via SuchchDev.cds instead of instantiating */ +typedef struct CcwDataStream { +#define CDS_F_IDA 0x01 +#define CDS_F_MIDA 0x02 +#define CDS_F_I2K 0x04 +#define CDS_F_C64 0x08 +#define CDS_F_STREAM_BROKEN 0x80 + uint8_t flags; + uint8_t at_idaw; + uint16_t at_byte; + uint16_t count; + uint32_t cda_orig; + int (*op_handler)(struct CcwDataStream *cds, void *buff, int len, + CcwDataStreamOp op); + hwaddr cda; +} CcwDataStream; + typedef struct SubchDev SubchDev; struct SubchDev { /* channel-subsystem related things: */ @@ -92,6 +115,7 @@ struct SubchDev { uint8_t ccw_no_data_cnt; uint16_t migrated_schid; /* used for missmatch detection */ ORB orb; + CcwDataStream cds; /* transport-provided data: */ int (*ccw_cb) (SubchDev *, CCW1); void (*disable_cb)(SubchDev *); @@ -240,4 +264,47 @@ SubchDev *css_create_sch(CssDevId bus_id, bool is_virt= ual, bool squash_mcss, /** Turn on css migration */ void css_register_vmstate(void); =20 + +void ccw_dstream_init(CcwDataStream *cds, CCW1 const *ccw, ORB const *orb); + +static inline void ccw_dstream_rewind(CcwDataStream *cds) +{ + cds->at_byte =3D 0; + cds->at_idaw =3D 0; + cds->cda =3D cds->cda_orig; +} + +static inline bool ccw_dstream_good(CcwDataStream *cds) +{ + return !(cds->flags & CDS_F_STREAM_BROKEN); +} + +static inline uint16_t ccw_dstream_residual_count(CcwDataStream *cds) +{ + return cds->count - cds->at_byte; +} + +static inline uint16_t ccw_dstream_avail(CcwDataStream *cds) +{ + return ccw_dstream_good(cds) ? ccw_dstream_residual_count(cds) : 0; +} + +static inline int ccw_dstream_advance(CcwDataStream *cds, int len) +{ + return cds->op_handler(cds, NULL, len, CDS_OP_A); +} + +static inline int ccw_dstream_write_buf(CcwDataStream *cds, void *buff, in= t len) +{ + return cds->op_handler(cds, buff, len, CDS_OP_W); +} + +static inline int ccw_dstream_read_buf(CcwDataStream *cds, void *buff, int= len) +{ + return cds->op_handler(cds, buff, len, CDS_OP_R); +} + +#define ccw_dstream_read(cds, v) ccw_dstream_read_buf((cds), &(v), sizeof(= v)) +#define ccw_dstream_write(cds, v) ccw_dstream_write_buf((cds), &(v), sizeo= f(v)) + #endif --=20 2.13.5 From nobody Mon Apr 29 09:49:23 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505845774329999.5835176272906; Tue, 19 Sep 2017 11:29:34 -0700 (PDT) Received: from localhost ([::1]:44769 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNH3-0004kf-Ar for importer@patchew.org; Tue, 19 Sep 2017 14:29:33 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53029) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNFX-0003n3-3n for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duNFS-0002EN-6V for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:27:59 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:58756 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 1duNFS-0002DS-1u for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:27:54 -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 v8JIOGs3129129 for ; Tue, 19 Sep 2017 14:27:53 -0400 Received: from e06smtp15.uk.ibm.com (e06smtp15.uk.ibm.com [195.75.94.111]) by mx0a-001b2d01.pphosted.com with ESMTP id 2d35e8bqyk-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 19 Sep 2017 14:27:53 -0400 Received: from localhost by e06smtp15.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 19 Sep 2017 19:27:50 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8JIRnaO11599994; Tue, 19 Sep 2017 18:27:49 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0913242041; Tue, 19 Sep 2017 19:24:02 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CE0574203F; Tue, 19 Sep 2017 19:24:01 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 19 Sep 2017 19:24:01 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Tue, 19 Sep 2017 20:27:42 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> References: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17091918-0020-0000-0000-000003B97365 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091918-0021-0000-0000-0000424B22C3 Message-Id: <20170919182745.90280-3-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-19_08:, , 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-1709190256 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 v3 2/5] s390x/css: use ccw data stream 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Replace direct access which implicitly assumes no IDA or MIDA with the new ccw data stream interface which should cope with these transparently in the future. Signed-off-by: Halil Pasic Reviewed-by: Dong Jia Shi Reviewed-by: Pierre Morel --- hw/s390x/css.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index e8d2016563..6b0cd8861b 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -890,6 +890,7 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_= addr, } =20 /* Look at the command. */ + ccw_dstream_init(&sch->cds, &ccw, &(sch->orb)); switch (ccw.cmd_code) { case CCW_CMD_NOOP: /* Nothing to do. */ @@ -903,8 +904,8 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_= addr, } } len =3D MIN(ccw.count, sizeof(sch->sense_data)); - cpu_physical_memory_write(ccw.cda, sch->sense_data, len); - sch->curr_status.scsw.count =3D ccw.count - len; + ccw_dstream_write_buf(&sch->cds, sch->sense_data, len); + sch->curr_status.scsw.count =3D ccw_dstream_residual_count(&sch->c= ds); memset(sch->sense_data, 0, sizeof(sch->sense_data)); ret =3D 0; break; @@ -930,8 +931,8 @@ static int css_interpret_ccw(SubchDev *sch, hwaddr ccw_= addr, } else { sense_id.reserved =3D 0; } - cpu_physical_memory_write(ccw.cda, &sense_id, len); - sch->curr_status.scsw.count =3D ccw.count - len; + ccw_dstream_write_buf(&sch->cds, &sense_id, len); + sch->curr_status.scsw.count =3D ccw_dstream_residual_count(&sch->c= ds); ret =3D 0; break; } --=20 2.13.5 From nobody Mon Apr 29 09:49:23 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505846036459231.53624699460033; Tue, 19 Sep 2017 11:33:56 -0700 (PDT) Received: from localhost ([::1]:44791 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNLE-0008CZ-Ox for importer@patchew.org; Tue, 19 Sep 2017 14:33:52 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53061) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNFZ-0003oB-JD for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:06 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duNFV-0002Jy-2u for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:01 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36298 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 1duNFU-0002J8-U3 for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:27:57 -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 v8JIOG9E030300 for ; Tue, 19 Sep 2017 14:27:56 -0400 Received: from e06smtp12.uk.ibm.com (e06smtp12.uk.ibm.com [195.75.94.108]) by mx0b-001b2d01.pphosted.com with ESMTP id 2d35nf2fev-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 19 Sep 2017 14:27:55 -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, 19 Sep 2017 19:27:51 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8JIRp5m30408932; Tue, 19 Sep 2017 18:27:51 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4B7CB42041; Tue, 19 Sep 2017 19:24:03 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 12E004203F; Tue, 19 Sep 2017 19:24:03 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 19 Sep 2017 19:24:03 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Tue, 19 Sep 2017 20:27:43 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> References: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17091918-0008-0000-0000-00000498717E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091918-0009-0000-0000-00001E29A44C Message-Id: <20170919182745.90280-4-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-19_08:, , 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-1709190256 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 v3 3/5] virtio-ccw: use ccw data stream 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Replace direct access which implicitly assumes no IDA or MIDA with the new ccw data stream interface which should cope with these transparently in the future. Signed-off-by: Halil Pasic Reviewed-by: Pierre Morel Reviewed-by: Dong Jia Shi --- hw/s390x/virtio-ccw.c | 157 +++++++++++++++-------------------------------= ---- 1 file changed, 46 insertions(+), 111 deletions(-) diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index b1976fdd19..d024f8b2d3 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -287,49 +287,19 @@ static int virtio_ccw_handle_set_vq(SubchDev *sch, CC= W1 ccw, bool check_len, return -EFAULT; } if (is_legacy) { - linfo.queue =3D address_space_ldq_be(&address_space_memory, ccw.cd= a, - MEMTXATTRS_UNSPECIFIED, NULL); - linfo.align =3D address_space_ldl_be(&address_space_memory, - ccw.cda + sizeof(linfo.queue), - MEMTXATTRS_UNSPECIFIED, - NULL); - linfo.index =3D address_space_lduw_be(&address_space_memory, - ccw.cda + sizeof(linfo.queue) - + sizeof(linfo.align), - MEMTXATTRS_UNSPECIFIED, - NULL); - linfo.num =3D address_space_lduw_be(&address_space_memory, - ccw.cda + sizeof(linfo.queue) - + sizeof(linfo.align) - + sizeof(linfo.index), - MEMTXATTRS_UNSPECIFIED, - NULL); + ccw_dstream_read(&sch->cds, linfo); + be64_to_cpus(&linfo.queue); + be32_to_cpus(&linfo.align); + be16_to_cpus(&linfo.index); + be16_to_cpus(&linfo.num); ret =3D virtio_ccw_set_vqs(sch, NULL, &linfo); } else { - info.desc =3D address_space_ldq_be(&address_space_memory, ccw.cda, - MEMTXATTRS_UNSPECIFIED, NULL); - info.index =3D address_space_lduw_be(&address_space_memory, - ccw.cda + sizeof(info.desc) - + sizeof(info.res0), - MEMTXATTRS_UNSPECIFIED, NULL); - info.num =3D address_space_lduw_be(&address_space_memory, - ccw.cda + sizeof(info.desc) - + sizeof(info.res0) - + sizeof(info.index), - MEMTXATTRS_UNSPECIFIED, NULL); - info.avail =3D address_space_ldq_be(&address_space_memory, - ccw.cda + sizeof(info.desc) - + sizeof(info.res0) - + sizeof(info.index) - + sizeof(info.num), - MEMTXATTRS_UNSPECIFIED, NULL); - info.used =3D address_space_ldq_be(&address_space_memory, - ccw.cda + sizeof(info.desc) - + sizeof(info.res0) - + sizeof(info.index) - + sizeof(info.num) - + sizeof(info.avail), - MEMTXATTRS_UNSPECIFIED, NULL); + ccw_dstream_read(&sch->cds, info); + be64_to_cpus(&info.desc); + be16_to_cpus(&info.index); + be16_to_cpus(&info.num); + be64_to_cpus(&info.avail); + be64_to_cpus(&info.used); ret =3D virtio_ccw_set_vqs(sch, &info, NULL); } sch->curr_status.scsw.count =3D 0; @@ -342,15 +312,13 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) VirtioRevInfo revinfo; uint8_t status; VirtioFeatDesc features; - void *config; hwaddr indicators; VqConfigBlock vq_config; VirtioCcwDevice *dev =3D sch->driver_data; VirtIODevice *vdev =3D virtio_ccw_get_vdev(sch); bool check_len; int len; - hwaddr hw_len; - VirtioThinintInfo *thinint; + VirtioThinintInfo thinint; =20 if (!dev) { return -EINVAL; @@ -394,11 +362,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) } else { VirtioDeviceClass *vdc =3D VIRTIO_DEVICE_GET_CLASS(vdev); =20 - features.index =3D address_space_ldub(&address_space_memory, - ccw.cda - + sizeof(features.features= ), - MEMTXATTRS_UNSPECIFIED, - NULL); + ccw_dstream_advance(&sch->cds, sizeof(features.features)); + ccw_dstream_read(&sch->cds, features.index); if (features.index =3D=3D 0) { if (dev->revision >=3D 1) { /* Don't offer legacy features for modern devices. */ @@ -417,9 +382,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) /* Return zeroes if the guest supports more feature bits. = */ features.features =3D 0; } - address_space_stl_le(&address_space_memory, ccw.cda, - features.features, MEMTXATTRS_UNSPECIFIED, - NULL); + ccw_dstream_rewind(&sch->cds); + cpu_to_le32s(&features.features); + ccw_dstream_write(&sch->cds, features.features); sch->curr_status.scsw.count =3D ccw.count - sizeof(features); ret =3D 0; } @@ -438,15 +403,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret =3D -EFAULT; } else { - features.index =3D address_space_ldub(&address_space_memory, - ccw.cda - + sizeof(features.features= ), - MEMTXATTRS_UNSPECIFIED, - NULL); - features.features =3D address_space_ldl_le(&address_space_memo= ry, - ccw.cda, - MEMTXATTRS_UNSPECIFIE= D, - NULL); + ccw_dstream_read(&sch->cds, features); + le32_to_cpus(&features.features); if (features.index =3D=3D 0) { virtio_set_features(vdev, (vdev->guest_features & 0xffffffff0000= 0000ULL) | @@ -487,8 +445,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ret =3D -EFAULT; } else { virtio_bus_get_vdev_config(&dev->bus, vdev->config); - /* XXX config space endianness */ - cpu_physical_memory_write(ccw.cda, vdev->config, len); + ccw_dstream_write_buf(&sch->cds, vdev->config, len); sch->curr_status.scsw.count =3D ccw.count - len; ret =3D 0; } @@ -501,21 +458,13 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) } } len =3D MIN(ccw.count, vdev->config_len); - hw_len =3D len; if (!ccw.cda) { ret =3D -EFAULT; } else { - config =3D cpu_physical_memory_map(ccw.cda, &hw_len, 0); - if (!config) { - ret =3D -EFAULT; - } else { - len =3D hw_len; - /* XXX config space endianness */ - memcpy(vdev->config, config, len); - cpu_physical_memory_unmap(config, hw_len, 0, hw_len); + ret =3D ccw_dstream_read_buf(&sch->cds, vdev->config, len); + if (!ret) { virtio_bus_set_vdev_config(&dev->bus, vdev->config); sch->curr_status.scsw.count =3D ccw.count - len; - ret =3D 0; } } break; @@ -553,8 +502,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret =3D -EFAULT; } else { - status =3D address_space_ldub(&address_space_memory, ccw.cda, - MEMTXATTRS_UNSPECIFIED, NULL); + ccw_dstream_read(&sch->cds, status); if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) { virtio_ccw_stop_ioeventfd(dev); } @@ -597,8 +545,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret =3D -EFAULT; } else { - indicators =3D address_space_ldq_be(&address_space_memory, ccw= .cda, - MEMTXATTRS_UNSPECIFIED, NULL= ); + ccw_dstream_read(&sch->cds, indicators); + be64_to_cpus(&indicators); dev->indicators =3D get_indicator(indicators, sizeof(uint64_t)= ); sch->curr_status.scsw.count =3D ccw.count - sizeof(indicators); ret =3D 0; @@ -618,8 +566,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret =3D -EFAULT; } else { - indicators =3D address_space_ldq_be(&address_space_memory, ccw= .cda, - MEMTXATTRS_UNSPECIFIED, NULL= ); + ccw_dstream_read(&sch->cds, indicators); + be64_to_cpus(&indicators); dev->indicators2 =3D get_indicator(indicators, sizeof(uint64_t= )); sch->curr_status.scsw.count =3D ccw.count - sizeof(indicators); ret =3D 0; @@ -639,67 +587,58 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) if (!ccw.cda) { ret =3D -EFAULT; } else { - vq_config.index =3D address_space_lduw_be(&address_space_memor= y, - ccw.cda, - MEMTXATTRS_UNSPECIFIED, - NULL); + ccw_dstream_read(&sch->cds, vq_config.index); + be16_to_cpus(&vq_config.index); if (vq_config.index >=3D VIRTIO_QUEUE_MAX) { ret =3D -EINVAL; break; } vq_config.num_max =3D virtio_queue_get_num(vdev, vq_config.index); - address_space_stw_be(&address_space_memory, - ccw.cda + sizeof(vq_config.index), - vq_config.num_max, - MEMTXATTRS_UNSPECIFIED, - NULL); + cpu_to_be16s(&vq_config.num_max); + ccw_dstream_write(&sch->cds, vq_config.num_max); sch->curr_status.scsw.count =3D ccw.count - sizeof(vq_config); ret =3D 0; } break; case CCW_CMD_SET_IND_ADAPTER: if (check_len) { - if (ccw.count !=3D sizeof(*thinint)) { + if (ccw.count !=3D sizeof(thinint)) { ret =3D -EINVAL; break; } - } else if (ccw.count < sizeof(*thinint)) { + } else if (ccw.count < sizeof(thinint)) { /* Can't execute command. */ ret =3D -EINVAL; break; } - len =3D sizeof(*thinint); - hw_len =3D len; if (!ccw.cda) { ret =3D -EFAULT; } else if (dev->indicators && !sch->thinint_active) { /* Trigger a command reject. */ ret =3D -ENOSYS; } else { - thinint =3D cpu_physical_memory_map(ccw.cda, &hw_len, 0); - if (!thinint) { + if (ccw_dstream_read(&sch->cds, thinint)) { ret =3D -EFAULT; } else { - uint64_t ind_bit =3D ldq_be_p(&thinint->ind_bit); + be64_to_cpus(&thinint.ind_bit); + be64_to_cpus(&thinint.summary_indicator); + be64_to_cpus(&thinint.device_indicator); =20 - len =3D hw_len; dev->summary_indicator =3D - get_indicator(ldq_be_p(&thinint->summary_indicator), - sizeof(uint8_t)); + get_indicator(thinint.summary_indicator, sizeof(uint8_= t)); dev->indicators =3D - get_indicator(ldq_be_p(&thinint->device_indicator), - ind_bit / 8 + 1); - dev->thinint_isc =3D thinint->isc; - dev->routes.adapter.ind_offset =3D ind_bit; + get_indicator(thinint.device_indicator, + thinint.ind_bit / 8 + 1); + dev->thinint_isc =3D thinint.isc; + dev->routes.adapter.ind_offset =3D thinint.ind_bit; dev->routes.adapter.summary_offset =3D 7; - cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len); dev->routes.adapter.adapter_id =3D css_get_adapter_id( CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc); sch->thinint_active =3D ((dev->indicators !=3D NULL) && (dev->summary_indicator !=3D NULL)); - sch->curr_status.scsw.count =3D ccw.count - len; + sch->curr_status.scsw.count =3D ccw.count - sizeof(thinint= ); ret =3D 0; } } @@ -714,13 +653,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ret =3D -EFAULT; break; } - revinfo.revision =3D - address_space_lduw_be(&address_space_memory, ccw.cda, - MEMTXATTRS_UNSPECIFIED, NULL); - revinfo.length =3D - address_space_lduw_be(&address_space_memory, - ccw.cda + sizeof(revinfo.revision), - MEMTXATTRS_UNSPECIFIED, NULL); + ccw_dstream_read_buf(&sch->cds, &revinfo, 4); + be16_to_cpus(&revinfo.revision); + be16_to_cpus(&revinfo.length); if (ccw.count < len + revinfo.length || (check_len && ccw.count > len + revinfo.length)) { ret =3D -EINVAL; --=20 2.13.5 From nobody Mon Apr 29 09:49:23 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505845898656119.00851458522948; Tue, 19 Sep 2017 11:31:38 -0700 (PDT) Received: from localhost ([::1]:44782 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNJ3-0006RK-Ny for importer@patchew.org; Tue, 19 Sep 2017 14:31:37 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53073) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNFa-0003p7-Nh for qemu-devel@nongnu.org; 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Violators will be prosecuted; Tue, 19 Sep 2017 19:27:52 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8JIRq8523527672; Tue, 19 Sep 2017 18:27:52 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8391942041; Tue, 19 Sep 2017 19:24:04 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 556044203F; Tue, 19 Sep 2017 19:24:04 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 19 Sep 2017 19:24:04 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Tue, 19 Sep 2017 20:27:44 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> References: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17091918-0040-0000-0000-000003FB71C4 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091918-0041-0000-0000-0000209CA4A2 Message-Id: <20170919182745.90280-5-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-19_08:, , 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-1709190256 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 v3 4/5] 390x/css: introduce maximum data address checking 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" The architecture mandates the addresses to be accessed on the first indirection level (that is, the data addresses without IDA, and the (M)IDAW addresses with (M)IDA) to be checked against an CCW format dependent limit maximum address. If a violation is detected, the storage access is not to be performed and a channel program check needs to be generated. As of today, we fail to do this check. Let us stick even closer to the architecture specification. Signed-off-by: Halil Pasic --- hw/s390x/css.c | 10 ++++++++++ include/hw/s390x/css.h | 1 + 2 files changed, 11 insertions(+) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 6b0cd8861b..2d37a9ddde 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -795,6 +795,11 @@ static inline int cds_check_len(CcwDataStream *cds, in= t len) return cds->flags & CDS_F_STREAM_BROKEN ? -EINVAL : len; } =20 +static inline bool cds_ccw_addrs_ok(hwaddr addr, int len, bool ccw_fmt1) +{ + return (addr + len) < (ccw_fmt1 ? (1UL << 31) : (1UL << 24)); +} + static int ccw_dstream_rw_noflags(CcwDataStream *cds, void *buff, int len, CcwDataStreamOp op) { @@ -804,6 +809,9 @@ static int ccw_dstream_rw_noflags(CcwDataStream *cds, v= oid *buff, int len, if (ret <=3D 0) { return ret; } + if (!cds_ccw_addrs_ok(cds->cda, len, cds->flags & CDS_F_FMT)) { + return -EINVAL; /* channel program check */ + } if (op =3D=3D CDS_OP_A) { goto incr; } @@ -828,7 +836,9 @@ void ccw_dstream_init(CcwDataStream *cds, CCW1 const *c= cw, ORB const *orb) g_assert(!(orb->ctrl1 & ORB_CTRL1_MASK_MIDAW)); cds->flags =3D (orb->ctrl0 & ORB_CTRL0_MASK_I2K ? CDS_F_I2K : 0) | (orb->ctrl0 & ORB_CTRL0_MASK_C64 ? CDS_F_C64 : 0) | + (orb->ctrl0 & ORB_CTRL0_MASK_FMT ? CDS_F_FMT : 0) | (ccw->flags & CCW_FLAG_IDA ? CDS_F_IDA : 0); + cds->count =3D ccw->count; cds->cda_orig =3D ccw->cda; ccw_dstream_rewind(cds); diff --git a/include/hw/s390x/css.h b/include/hw/s390x/css.h index 078356e94c..69b374730e 100644 --- a/include/hw/s390x/css.h +++ b/include/hw/s390x/css.h @@ -87,6 +87,7 @@ typedef struct CcwDataStream { #define CDS_F_MIDA 0x02 #define CDS_F_I2K 0x04 #define CDS_F_C64 0x08 +#define CDS_F_FMT 0x10 /* CCW format-1 */ #define CDS_F_STREAM_BROKEN 0x80 uint8_t flags; uint8_t at_idaw; --=20 2.13.5 From nobody Mon Apr 29 09:49:23 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1505845897370495.12161129198967; Tue, 19 Sep 2017 11:31:37 -0700 (PDT) Received: from localhost ([::1]:44781 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNJ2-0006Os-Lt for importer@patchew.org; Tue, 19 Sep 2017 14:31:36 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53049) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1duNFY-0003no-VP for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:02 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1duNFX-0002PY-RU for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:28:00 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:43830 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 1duNFX-0002Oj-M8 for qemu-devel@nongnu.org; Tue, 19 Sep 2017 14:27:59 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v8JIOH0A010652 for ; Tue, 19 Sep 2017 14:27:59 -0400 Received: from e06smtp14.uk.ibm.com (e06smtp14.uk.ibm.com [195.75.94.110]) by mx0b-001b2d01.pphosted.com with ESMTP id 2d374nn5gv-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 19 Sep 2017 14:27:59 -0400 Received: from localhost by e06smtp14.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 19 Sep 2017 19:27:54 +0100 Received: from d06av24.portsmouth.uk.ibm.com (mk.ibm.com [9.149.105.60]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8JIRrdc17367072; Tue, 19 Sep 2017 18:27:53 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BBFBA42041; Tue, 19 Sep 2017 19:24:05 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8E2484203F; Tue, 19 Sep 2017 19:24:05 +0100 (BST) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Tue, 19 Sep 2017 19:24:05 +0100 (BST) From: Halil Pasic To: Cornelia Huck Date: Tue, 19 Sep 2017 20:27:45 +0200 X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> References: <20170919182745.90280-1-pasic@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17091918-0016-0000-0000-000004EE746B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17091918-0017-0000-0000-00002828A8F8 Message-Id: <20170919182745.90280-6-pasic@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-19_08:, , 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-1709190256 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 v3 5/5] s390x/css: support ccw IDA 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Let's add indirect data addressing support for our virtual channel subsystem. This implementation does not bother with any kind of prefetching. We simply step through the IDAL on demand. Signed-off-by: Halil Pasic Signed-off-by: Cornelia Huck --- hw/s390x/css.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++= +++- 1 file changed, 116 insertions(+), 1 deletion(-) diff --git a/hw/s390x/css.c b/hw/s390x/css.c index 2d37a9ddde..a3ce6d89b6 100644 --- a/hw/s390x/css.c +++ b/hw/s390x/css.c @@ -827,6 +827,121 @@ incr: return 0; } =20 +/* returns values between 1 and bsz, where bsz is a power of 2 */ +static inline uint16_t ida_continuous_left(hwaddr cda, uint64_t bsz) +{ + return bsz - (cda & (bsz - 1)); +} + +static inline uint64_t ccw_ida_block_size(uint8_t flags) +{ + if ((flags & CDS_F_C64) && !(flags & CDS_F_I2K)) { + return 1ULL << 12; + } + return 1ULL << 11; +} + +static inline int ida_read_next_idaw(CcwDataStream *cds, bool ccw_fmt1, + bool idaw_fmt_2) +{ + union {uint64_t fmt2; uint32_t fmt1; } idaw; + int ret; + hwaddr idaw_addr; + + if (idaw_fmt_2) { + idaw_addr =3D cds->cda_orig + sizeof(idaw.fmt2) * cds->at_idaw; + if (idaw_addr & 0x07 && cds_ccw_addrs_ok(idaw_addr, 0, ccw_fmt1)) { + return -EINVAL; /* channel program check */ + } + ret =3D address_space_rw(&address_space_memory, idaw_addr, + MEMTXATTRS_UNSPECIFIED, (void *) &idaw.fmt2, + sizeof(idaw.fmt2), false); + cds->cda =3D be64_to_cpu(idaw.fmt2); + } else { + idaw_addr =3D cds->cda_orig + sizeof(idaw.fmt1) * cds->at_idaw; + if (idaw_addr & 0x03 && cds_ccw_addrs_ok(idaw_addr, 0, ccw_fmt1)) { + return -EINVAL; /* channel program check */ + } + ret =3D address_space_rw(&address_space_memory, idaw_addr, + MEMTXATTRS_UNSPECIFIED, (void *) &idaw.fmt1, + sizeof(idaw.fmt1), false); + cds->cda =3D be64_to_cpu(idaw.fmt1); + } + ++(cds->at_idaw); + if (ret !=3D MEMTX_OK) { + /* assume inaccessible address */ + return -EINVAL; /* channel program check */ + + } + return 0; +} + +static int ccw_dstream_rw_ida(CcwDataStream *cds, void *buff, int len, + CcwDataStreamOp op) +{ + uint64_t bsz =3D ccw_ida_block_size(cds->flags); + int ret =3D 0; + uint16_t cont_left, iter_len; + const bool idaw_fmt2 =3D cds->flags & CDS_F_C64; + bool ccw_fmt1 =3D cds->flags & CDS_F_FMT; + + ret =3D cds_check_len(cds, len); + if (ret <=3D 0) { + return ret; + } + if (!cds->at_idaw) { + /* read first idaw */ + ret =3D ida_read_next_idaw(cds, ccw_fmt1, idaw_fmt2); + if (ret) { + goto err; + } + cont_left =3D ida_continuous_left(cds->cda, bsz); + } else { + cont_left =3D ida_continuous_left(cds->cda, bsz); + if (cont_left =3D=3D bsz) { + ret =3D ida_read_next_idaw(cds, ccw_fmt1, idaw_fmt2); + if (ret) { + goto err; + } + if (cds->cda & (bsz - 1)) { + ret =3D -EINVAL; /* channel program check */ + goto err; + } + } + } + do { + iter_len =3D MIN(len, cont_left); + if (!idaw_fmt2 && (cds->cda + iter_len) >=3D (1ULL << 31)) { + ret =3D -EINVAL; /* channel program check */ + goto err; + } + if (op !=3D CDS_OP_A) { + ret =3D address_space_rw(&address_space_memory, cds->cda, + MEMTXATTRS_UNSPECIFIED, buff, iter_len,= op); + if (ret !=3D MEMTX_OK) { + /* assume inaccessible address */ + ret =3D -EINVAL; /* channel program check */ + goto err; + } + } + cds->at_byte +=3D iter_len; + cds->cda +=3D iter_len; + len -=3D iter_len; + if (!len) { + break; + } + ret =3D ida_read_next_idaw(cds, ccw_fmt1, idaw_fmt2); + if (ret) { + goto err; + } + cont_left =3D bsz; + } while (true); + return ret; +err: + cds->flags |=3D CDS_F_STREAM_BROKEN; + return ret; +} + void ccw_dstream_init(CcwDataStream *cds, CCW1 const *ccw, ORB const *orb) { /* @@ -845,7 +960,7 @@ void ccw_dstream_init(CcwDataStream *cds, CCW1 const *c= cw, ORB const *orb) if (!(cds->flags & CDS_F_IDA)) { cds->op_handler =3D ccw_dstream_rw_noflags; } else { - assert(false); + cds->op_handler =3D ccw_dstream_rw_ida; } } =20 --=20 2.13.5