From nobody Sun Feb 8 12:19:36 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=linux.ibm.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1548768926738484.89864589289846; Tue, 29 Jan 2019 05:35:26 -0800 (PST) Received: from localhost ([127.0.0.1]:49576 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goTXx-0004KQ-BD for importer@patchew.org; Tue, 29 Jan 2019 08:35:25 -0500 Received: from eggs.gnu.org ([209.51.188.92]:60186) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goTSO-0008KD-BD for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:29:41 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1goTSN-00007Y-4e for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:29:40 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:49924 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 1goTSM-00006m-VD for qemu-devel@nongnu.org; Tue, 29 Jan 2019 08:29:39 -0500 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x0TDQwiH020025 for ; Tue, 29 Jan 2019 08:29:38 -0500 Received: from e13.ny.us.ibm.com (e13.ny.us.ibm.com [129.33.205.203]) by mx0a-001b2d01.pphosted.com with ESMTP id 2qaqcv1fkv-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 29 Jan 2019 08:29:38 -0500 Received: from localhost by e13.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 29 Jan 2019 13:29:36 -0000 Received: from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com [9.57.199.110]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0TDTY6V24772814 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 29 Jan 2019 13:29:34 GMT Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1EFA1AE062; Tue, 29 Jan 2019 13:29:34 +0000 (GMT) Received: from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CD56CAE05C; Tue, 29 Jan 2019 13:29:33 +0000 (GMT) Received: from jason-laptop.ibm.com (unknown [9.85.137.128]) by b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 29 Jan 2019 13:29:33 +0000 (GMT) From: "Jason J. Herne" To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org, cohuck@redhat.com, pasic@linux.ibm.com, alifm@linux.ibm.com, borntraeger@de.ibm.com Date: Tue, 29 Jan 2019 08:29:14 -0500 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548768562-20007-1-git-send-email-jjherne@linux.ibm.com> References: <1548768562-20007-1-git-send-email-jjherne@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19012913-0064-0000-0000-0000039F6F62 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010499; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000277; SDB=6.01153466; UDB=6.00601366; IPR=6.00933833; MB=3.00025338; MTD=3.00000008; XFM=3.00000015; UTC=2019-01-29 13:29:37 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19012913-0065-0000-0000-00003C37C61F Message-Id: <1548768562-20007-8-git-send-email-jjherne@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-01-29_10:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901290102 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 07/15] s390-bios: Decouple channel i/o logic from virtio 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Create a separate library for channel i/o related code. This decouples channel i/o operations from virtio and allows us to make use of them for the real dasd boot path. Signed-off-by: Jason J. Herne --- pc-bios/s390-ccw/Makefile | 2 +- pc-bios/s390-ccw/cio.c | 41 ++++++++++++++++++++++++++++++++++++= ++++ pc-bios/s390-ccw/cio.h | 3 +++ pc-bios/s390-ccw/main.c | 1 + pc-bios/s390-ccw/netboot.mak | 2 +- pc-bios/s390-ccw/netmain.c | 1 + pc-bios/s390-ccw/s390-ccw.h | 1 - pc-bios/s390-ccw/virtio-blkdev.c | 1 + pc-bios/s390-ccw/virtio.c | 27 ++------------------------ 9 files changed, 51 insertions(+), 28 deletions(-) create mode 100644 pc-bios/s390-ccw/cio.c diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile index 1eb316b..12ad9c1 100644 --- a/pc-bios/s390-ccw/Makefile +++ b/pc-bios/s390-ccw/Makefile @@ -10,7 +10,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/s390-ccw) .PHONY : all clean build-all =20 OBJECTS =3D start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \ - virtio.o virtio-scsi.o virtio-blkdev.o libc.o + virtio.o virtio-scsi.o virtio-blkdev.o libc.o cio.o =20 QEMU_CFLAGS :=3D $(filter -W%, $(QEMU_CFLAGS)) QEMU_CFLAGS +=3D -ffreestanding -fno-delete-null-pointer-checks -msoft-flo= at diff --git a/pc-bios/s390-ccw/cio.c b/pc-bios/s390-ccw/cio.c new file mode 100644 index 0000000..095f79b --- /dev/null +++ b/pc-bios/s390-ccw/cio.c @@ -0,0 +1,41 @@ +/* + * S390 Channel I/O + * + * Copyright (c) 2018 Jason J. Herne + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#include "libc.h" +#include "s390-ccw.h" +#include "cio.h" + +static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); + +int enable_mss_facility(void) +{ + int ret; + ChscAreaSda *sda_area =3D (ChscAreaSda *) chsc_page; + + memset(sda_area, 0, PAGE_SIZE); + sda_area->request.length =3D 0x0400; + sda_area->request.code =3D 0x0031; + sda_area->operation_code =3D 0x2; + + ret =3D chsc(sda_area); + if ((ret =3D=3D 0) && (sda_area->response.code =3D=3D 0x0001)) { + return 0; + } + return -EIO; +} + +void enable_subchannel(SubChannelId schid) +{ + Schib schib; + + stsch_err(schid, &schib); + schib.pmcw.ena =3D 1; + msch(schid, &schib); +} diff --git a/pc-bios/s390-ccw/cio.h b/pc-bios/s390-ccw/cio.h index a48eee5..7b07d75 100644 --- a/pc-bios/s390-ccw/cio.h +++ b/pc-bios/s390-ccw/cio.h @@ -213,6 +213,9 @@ typedef struct irb { __u32 emw[8]; } __attribute__ ((packed, aligned(4))) Irb; =20 +int enable_mss_facility(void); +void enable_subchannel(SubChannelId schid); + /* * Some S390 specific IO instructions as inline */ diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c index 2457752..1bc61b5 100644 --- a/pc-bios/s390-ccw/main.c +++ b/pc-bios/s390-ccw/main.c @@ -10,6 +10,7 @@ =20 #include "libc.h" #include "s390-ccw.h" +#include "cio.h" #include "virtio.h" =20 char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE))); diff --git a/pc-bios/s390-ccw/netboot.mak b/pc-bios/s390-ccw/netboot.mak index 14e96b2..5eefb7c 100644 --- a/pc-bios/s390-ccw/netboot.mak +++ b/pc-bios/s390-ccw/netboot.mak @@ -1,7 +1,7 @@ =20 SLOF_DIR :=3D $(SRC_PATH)/roms/SLOF =20 -NETOBJS :=3D start.o sclp.o virtio.o virtio-net.o jump2ipl.o netmain.o \ +NETOBJS :=3D start.o sclp.o cio.o virtio.o virtio-net.o jump2ipl.o netmain= .o \ libnet.a libc.a =20 LIBC_INC :=3D -nostdinc -I$(SLOF_DIR)/lib/libc/include diff --git a/pc-bios/s390-ccw/netmain.c b/pc-bios/s390-ccw/netmain.c index 0392131..5189c0f 100644 --- a/pc-bios/s390-ccw/netmain.c +++ b/pc-bios/s390-ccw/netmain.c @@ -33,6 +33,7 @@ #include =20 #include "s390-ccw.h" +#include "cio.h" #include "virtio.h" =20 #define DEFAULT_BOOT_RETRIES 10 diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h index 241c6d0..b39ee5d 100644 --- a/pc-bios/s390-ccw/s390-ccw.h +++ b/pc-bios/s390-ccw/s390-ccw.h @@ -72,7 +72,6 @@ unsigned long virtio_load_direct(ulong rec_list1, ulong r= ec_list2, bool virtio_is_supported(SubChannelId schid); void virtio_blk_setup_device(SubChannelId schid); int virtio_read(ulong sector, void *load_addr); -int enable_mss_facility(void); u64 get_clock(void); ulong get_second(void); =20 diff --git a/pc-bios/s390-ccw/virtio-blkdev.c b/pc-bios/s390-ccw/virtio-blk= dev.c index 11c5626..d2e7fcd 100644 --- a/pc-bios/s390-ccw/virtio-blkdev.c +++ b/pc-bios/s390-ccw/virtio-blkdev.c @@ -10,6 +10,7 @@ =20 #include "libc.h" #include "s390-ccw.h" +#include "cio.h" #include "virtio.h" #include "virtio-scsi.h" =20 diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c index cdb66f4..aa9da72 100644 --- a/pc-bios/s390-ccw/virtio.c +++ b/pc-bios/s390-ccw/virtio.c @@ -10,6 +10,7 @@ =20 #include "libc.h" #include "s390-ccw.h" +#include "cio.h" #include "virtio.h" #include "virtio-scsi.h" #include "bswap.h" @@ -20,8 +21,6 @@ static VRing block[VIRTIO_MAX_VQS]; static char ring_area[VIRTIO_RING_SIZE * VIRTIO_MAX_VQS] __attribute__((__aligned__(PAGE_SIZE))); =20 -static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); - static VDev vdev =3D { .nr_vqs =3D 1, .vrings =3D block, @@ -94,14 +93,9 @@ static int run_ccw(VDev *vdev, int cmd, void *ptr, int l= en) { Ccw1 ccw =3D {}; CmdOrb orb =3D {}; - Schib schib; int r; =20 - /* start command processing */ - stsch_err(vdev->schid, &schib); - /* enable the subchannel for IPL device */ - schib.pmcw.ena =3D 1; - msch(vdev->schid, &schib); + enable_subchannel(vdev->schid); =20 /* start subchannel command */ orb.fmt =3D 1; @@ -343,20 +337,3 @@ bool virtio_is_supported(SubChannelId schid) } return false; } - -int enable_mss_facility(void) -{ - int ret; - ChscAreaSda *sda_area =3D (ChscAreaSda *) chsc_page; - - memset(sda_area, 0, PAGE_SIZE); - sda_area->request.length =3D 0x0400; - sda_area->request.code =3D 0x0031; - sda_area->operation_code =3D 0x2; - - ret =3D chsc(sda_area); - if ((ret =3D=3D 0) && (sda_area->response.code =3D=3D 0x0001)) { - return 0; - } - return -EIO; -} --=20 2.7.4