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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 B6808C35254 for ; Mon, 10 Feb 2020 17:58:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8BBCE20715 for ; Mon, 10 Feb 2020 17:58:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727120AbgBJR6q (ORCPT ); Mon, 10 Feb 2020 12:58:46 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:48070 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726896AbgBJR6q (ORCPT ); Mon, 10 Feb 2020 12:58:46 -0500 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 01AHt3r0167786 for ; Mon, 10 Feb 2020 12:58:45 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2y1umryuna-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 10 Feb 2020 12:58:44 -0500 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 10 Feb 2020 17:58:42 -0000 Received: from b06cxnps3075.portsmouth.uk.ibm.com (9.149.109.195) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 10 Feb 2020 17:58:40 -0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 01AHwd4514942346 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 10 Feb 2020 17:58:39 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7142FAE051; Mon, 10 Feb 2020 17:58:39 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 216ECAE04D; Mon, 10 Feb 2020 17:58:39 +0000 (GMT) Received: from localhost (unknown [9.145.76.6]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Mon, 10 Feb 2020 17:58:39 +0000 (GMT) Date: Mon, 10 Feb 2020 18:58:37 +0100 From: Vasily Gorbik To: Nick Desaulniers Cc: clang-built-linux , LKML , David Hildenbrand Subject: Re: LKML: Vasily Gorbik: [GIT PULL] s390 patches for the 5.6 merge window References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-TM-AS-GCONF: 00 x-cbid: 20021017-0012-0000-0000-000003859303 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20021017-0013-0000-0000-000021C20BB2 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-02-10_06:2020-02-10,2020-02-10 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 bulkscore=0 spamscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 malwarescore=0 phishscore=0 suspectscore=0 mlxscore=0 mlxlogscore=844 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002100134 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 07, 2020 at 10:22:20PM +0000, Nick Desaulniers wrote: > + Vasily for real > > On Fri, Feb 7, 2020, 11:02 PM Nick Desaulniers > wrote: > > > https://lkml.org/lkml/2020/1/28/1141 > > > > Yo, what's up with clang 10 support? I believe s390 kernel had limited clang build support since about 5.2 (with jump labels and ftrace disabled), thanks to contributions from Arnd Bergmann. With asm goto support in clang 9 and now everything for ftrace in place in clang 10 s390 kernel should be in a good shape feature wise (including KASAN). At this stage clang based tooling is the main interest. > > > > Can I boot this in qemu? > > qemu tcg seems to work fine for gcc built s390 kernels. While clang built kernels run smoothly natively and with accel=kvm there is still something to be fixed for accel=tcg (kernel fails to boot on both s390 and x86).