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Tue, 19 Nov 2019 17:50:18 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id xAJHnICs049201; Tue, 19 Nov 2019 17:50:18 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 2wcema8sqn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Nov 2019 17:50:17 +0000 Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id xAJHoFYP011014; Tue, 19 Nov 2019 17:50:15 GMT Received: from bostrovs-us.us.oracle.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 19 Nov 2019 09:50:15 -0800 Subject: Re: Ping: [PATCH 0/2] x86/Xen/32: xen_iret_crit_fixup adjustments To: Jan Beulich , Juergen Gross Cc: lkml , the arch/x86 maintainers , Andy Lutomirski , "xen-devel@lists.xenproject.org" References: <09359c00-5769-0e0d-4af9-963897d3b498@suse.com> From: Boris Ostrovsky Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: <09359c00-5769-0e0d-4af9-963897d3b498@suse.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9446 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-1911190152 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9446 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default 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=8.0.1-1911140001 definitions=main-1911190152 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/19/19 7:58 AM, Jan Beulich wrote: > On 11.11.2019 15:30, Jan Beulich wrote: >> The first patch here fixes another regression from 3c88c692c287 >> ("x86/stackframe/32: Provide consistent pt_regs"), besides the >> one already addressed by >> https://lists.xenproject.org/archives/html/xen-devel/2019-10/msg01988.html. >> The second patch is a minimal bit of cleanup on top. >> >> 1: make xen_iret_crit_fixup independent of frame layout >> 2: simplify xen_iret_crit_fixup's ring check > Seeing that the other regression fix has been taken into -tip, > what is the situation here? Should 5.4 really ship with this > still unfixed? I am still unable to boot a 32-bit guest with those patches, crashing in int3_exception_notify with regs->sp zero. When I revert to 3c88c692c287 the guest actually boots so my (?) problem was introduced somewhere in-between. -boris