From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73C59C43331 for ; Wed, 1 Apr 2020 13:02:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 44FBD206E9 for ; Wed, 1 Apr 2020 13:02:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732676AbgDANCP (ORCPT ); Wed, 1 Apr 2020 09:02:15 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:43378 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1732561AbgDANCO (ORCPT ); Wed, 1 Apr 2020 09:02:14 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 031CdoRx007301 for ; Wed, 1 Apr 2020 09:02:12 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 304t5gtfj3-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 01 Apr 2020 09:02:12 -0400 Received: from localhost by e06smtp04.uk.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) Wed, 1 Apr 2020 14:01:49 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 031D22HY48693250 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 1 Apr 2020 13:02:03 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D5B6A5204E; Wed, 1 Apr 2020 13:02:02 +0000 (GMT) Received: from oc7455500831.ibm.com (unknown [9.145.71.143]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 46B925204F; Wed, 1 Apr 2020 13:02:01 +0000 (GMT) Subject: Re: [PATCH V9 1/9] vhost: refine vhost and vringh kconfig From: Christian Borntraeger To: Jason Wang , mst@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Cc: jgg@mellanox.com, maxime.coquelin@redhat.com, cunming.liang@intel.com, zhihong.wang@intel.com, rob.miller@broadcom.com, xiao.w.wang@intel.com, lingshan.zhu@intel.com, eperezma@redhat.com, lulu@redhat.com, parav@mellanox.com, kevin.tian@intel.com, stefanha@redhat.com, rdunlap@infradead.org, hch@infradead.org, aadam@redhat.com, jiri@mellanox.com, shahafs@mellanox.com, hanand@xilinx.com, mhabets@solarflare.com, gdawar@xilinx.com, saugatm@xilinx.com, vmireyno@marvell.com, zhangweining@ruijie.com.cn References: <20200326140125.19794-1-jasowang@redhat.com> <20200326140125.19794-2-jasowang@redhat.com> <41ee1f6a-3124-d44b-bf34-0f26604f9514@redhat.com> <4726da4c-11ec-3b6e-1218-6d6d365d5038@de.ibm.com> Autocrypt: addr=borntraeger@de.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <4726da4c-11ec-3b6e-1218-6d6d365d5038@de.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 20040113-0016-0000-0000-000002FC566D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20040113-0017-0000-0000-000033601B0C Message-Id: <39b96e3a-9f4e-6e1d-e988-8c4bcfb55879@de.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-04-01_01:2020-03-31,2020-03-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 mlxlogscore=999 priorityscore=1501 malwarescore=0 mlxscore=0 suspectscore=0 lowpriorityscore=0 spamscore=0 bulkscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004010109 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01.04.20 14:56, Christian Borntraeger wrote: > > On 01.04.20 14:50, Jason Wang wrote: >> >> On 2020/4/1 下午7:21, Christian Borntraeger wrote: >>> On 26.03.20 15:01, Jason Wang wrote: >>>> Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is >>>> not necessarily for VM since it's a generic userspace and kernel >>>> communication protocol. Such dependency may prevent archs without >>>> virtualization support from using vhost. >>>> >>>> To solve this, a dedicated vhost menu is created under drivers so >>>> CONIFG_VHOST can be decoupled out of CONFIG_VIRTUALIZATION. >>> FWIW, this now results in vhost not being build with defconfig kernels (in todays >>> linux-next). >>> >> >> Hi Christian: >> >> Did you meet it even with this commit https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a4be40cbcedba9b5b714f3c95182e8a45176e42d? > > I simply used linux-next. The defconfig does NOT contain CONFIG_VHOST and therefore CONFIG_VHOST_NET and friends > can not be selected. > > $ git checkout next-20200401 > $ make defconfig > HOSTCC scripts/basic/fixdep > HOSTCC scripts/kconfig/conf.o > HOSTCC scripts/kconfig/confdata.o > HOSTCC scripts/kconfig/expr.o > LEX scripts/kconfig/lexer.lex.c > YACC scripts/kconfig/parser.tab.[ch] > HOSTCC scripts/kconfig/lexer.lex.o > HOSTCC scripts/kconfig/parser.tab.o > HOSTCC scripts/kconfig/preprocess.o > HOSTCC scripts/kconfig/symbol.o > HOSTCC scripts/kconfig/util.o > HOSTLD scripts/kconfig/conf > *** Default configuration is based on 'x86_64_defconfig' > # > # configuration written to .config > # > > $ grep VHOST .config > # CONFIG_VHOST is not set > > >> If yes, what's your build config looks like? >> >> Thanks This was x86. Not sure if that did work before. On s390 this is definitely a regression as the defconfig files for s390 do select VHOST_NET grep VHOST arch/s390/configs/* arch/s390/configs/debug_defconfig:CONFIG_VHOST_NET=m arch/s390/configs/debug_defconfig:CONFIG_VHOST_VSOCK=m arch/s390/configs/defconfig:CONFIG_VHOST_NET=m arch/s390/configs/defconfig:CONFIG_VHOST_VSOCK=m and this worked with 5.6, but does not work with next. Just adding CONFIG_VHOST=m to the defconfig solves the issue, something like --- arch/s390/configs/debug_defconfig | 5 +++-- arch/s390/configs/defconfig | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig index 46038bc58c9e..0b83274341ce 100644 --- a/arch/s390/configs/debug_defconfig +++ b/arch/s390/configs/debug_defconfig @@ -57,8 +57,6 @@ CONFIG_PROTECTED_VIRTUALIZATION_GUEST=y CONFIG_CMM=m CONFIG_APPLDATA_BASE=y CONFIG_KVM=m -CONFIG_VHOST_NET=m -CONFIG_VHOST_VSOCK=m CONFIG_OPROFILE=m CONFIG_KPROBES=y CONFIG_JUMP_LABEL=y @@ -561,6 +559,9 @@ CONFIG_VFIO_MDEV_DEVICE=m CONFIG_VIRTIO_PCI=m CONFIG_VIRTIO_BALLOON=m CONFIG_VIRTIO_INPUT=y +CONFIG_VHOST=m +CONFIG_VHOST_NET=m +CONFIG_VHOST_VSOCK=m CONFIG_S390_CCW_IOMMU=y CONFIG_S390_AP_IOMMU=y CONFIG_EXT4_FS=y diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig index 7cd0648c1f4e..39e69c4e8cf7 100644 --- a/arch/s390/configs/defconfig +++ b/arch/s390/configs/defconfig @@ -57,8 +57,6 @@ CONFIG_PROTECTED_VIRTUALIZATION_GUEST=y CONFIG_CMM=m CONFIG_APPLDATA_BASE=y CONFIG_KVM=m -CONFIG_VHOST_NET=m -CONFIG_VHOST_VSOCK=m CONFIG_OPROFILE=m CONFIG_KPROBES=y CONFIG_JUMP_LABEL=y @@ -557,6 +555,9 @@ CONFIG_VFIO_MDEV_DEVICE=m CONFIG_VIRTIO_PCI=m CONFIG_VIRTIO_BALLOON=m CONFIG_VIRTIO_INPUT=y +CONFIG_VHOST=m +CONFIG_VHOST_NET=m +CONFIG_VHOST_VSOCK=m CONFIG_S390_CCW_IOMMU=y CONFIG_S390_AP_IOMMU=y CONFIG_EXT4_FS=y -- 2.25.1