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Tue, 8 Sep 2020 13:09:24 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3C887A4053; Tue, 8 Sep 2020 13:09:24 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.36.147]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 8 Sep 2020 13:09:24 +0000 (GMT) Subject: Re: [PATCH v3] s390x: Add 3f program exception handler To: Heiko Carstens Cc: linux-s390@vger.kernel.org, borntraeger@de.ibm.com, gor@linux.ibm.com, imbrenda@linux.ibm.com, kvm@vger.kernel.org, david@redhat.com, cohuck@redhat.com, thuth@redhat.com References: <20200908075337.GA9170@osiris> <20200908130504.24641-1-frankja@linux.ibm.com> <20200908130655.GF14136@osiris> From: Janosch Frank Autocrypt: addr=frankja@linux.ibm.com; prefer-encrypt=mutual; keydata= mQINBFubpD4BEADX0uhkRhkj2AVn7kI4IuPY3A8xKat0ihuPDXbynUC77mNox7yvK3X5QBO6 qLqYr+qrG3buymJJRD9xkp4mqgasHdB5WR9MhXWKH08EvtvAMkEJLnqxgbqf8td3pCQ2cEpv 15mH49iKSmlTcJ+PvJpGZcq/jE42u9/0YFHhozm8GfQdb9SOI/wBSsOqcXcLTUeAvbdqSBZe zuMRBivJQQI1esD9HuADmxdE7c4AeMlap9MvxvUtWk4ZJ/1Z3swMVCGzZb2Xg/9jZpLsyQzb lDbbTlEeyBACeED7DYLZI3d0SFKeJZ1SUyMmSOcr9zeSh4S4h4w8xgDDGmeDVygBQZa1HaoL Esb8Y4avOYIgYDhgkCh0nol7XQ5i/yKLtnNThubAcxNyryw1xSstnKlxPRoxtqTsxMAiSekk 0m3WJwvwd1s878HrQNK0orWd8BzzlSswzjNfQYLF466JOjHPWFOok9pzRs+ucrs6MUwDJj0S cITWU9Rxb04XyigY4XmZ8dywaxwi2ZVTEg+MD+sPmRrTw+5F+sU83cUstuymF3w1GmyofgsU Z+/ldjToHnq21MNa1wx0lCEipCCyE/8K9B9bg9pUwy5lfx7yORP3JuAUfCYb8DVSHWBPHKNj HTOLb2g2UT65AjZEQE95U2AY9iYm5usMqaWD39pAHfhC09/7NQARAQABtCVKYW5vc2NoIEZy YW5rIDxmcmFua2phQGxpbnV4LmlibS5jb20+iQI3BBMBCAAhBQJbm6Q+AhsjBQsJCAcCBhUI CQoLAgQWAgMBAh4BAheAAAoJEONU5rjiOLn4p9gQALjkdj5euJVI2nNT3/IAxAhQSmRhPEt0 AmnCYnuTcHRWPujNr5kqgtyER9+EMQ0ZkX44JU2q7OWxTdSNSAN/5Z7qmOR9JySvDOf4d3mS bMB5zxL9d8SbnSs1uW96H9ZBTlTQnmLfsiM9TetAjSrR8nUmjGhe2YUhJLR1v1LguME+YseT eXnLzIzqqpu311/eYiiIGcmaOjPCE+vFjcXL5oLnGUE73qSYiujwhfPCCUK0850o1fUAYq5p CNBCoKT4OddZR+0itKc/cT6NwEDwdokeg0+rAhxb4Rv5oFO70lziBplEjOxu3dqgIKbHbjza EXTb+mr7VI9O4tTdqrwJo2q9zLqqOfDBi7NDvZFLzaCewhbdEpDYVu6/WxprAY94hY3F4trT rQMHJKQENtF6ZTQc9fcT5I3gAmP+OEvDE5hcTALpWm6Z6SzxO7gEYCnF+qGXqp8sJVrweMub UscyLqHoqdZC2UG4LQ1OJ97nzDpIRe0g6oJ9ZIYHKmfw5jjwH6rASTld5MFWajWdNsqK15k/ RZnHAGICKVIBOBsq26m4EsBlfCdt3b/6emuBjUXR1pyjHMz2awWzCq6/6OWs5eANZ0sdosNq dq2v0ULYTazJz2rlCXV89qRa7ukkNwdBSZNEwsD4eEMicj1LSrqWDZMAALw50L4jxaMD7lPL jJbauQINBFubpD4BEADAcUTRqXF/aY53OSH7IwIK9lFKxIm0IoFkOEh7LMfp7FGzaP7ANrZd cIzhZi38xyOkcaFY+npGEWvko7rlIAn0JpBO4x3hfhmhBD/WSY8LQIFQNNjEm3vzrMo7b9Jb JAqQxfbURY3Dql3GUzeWTG9uaJ00u+EEPlY8zcVShDltIl5PLih20e8xgTnNzx5c110lQSu0 iZv2lAE6DM+2bJQTsMSYiwKlwTuv9LI9Chnoo6+tsN55NqyMxYqJgElk3VzlTXSr3+rtSCwf tq2cinETbzxc1XuhIX6pu/aCGnNfuEkM34b7G1D6CPzDMqokNFbyoO6DQ1+fW6c5gctXg/lZ 602iEl4C4rgcr3+EpfoPUWzKeM8JXv5Kpq4YDxhvbitr8Dm8gr38+UKFZKlWLlwhQ56r/zAU v6LIsm11GmFs2/cmgD1bqBTNHHcTWwWtRTLgmnqJbVisMJuYJt4KNPqphTWsPY8SEtbufIlY HXOJ2lqUzOReTrie2u0qcSvGAbSfec9apTFl2Xko/ddqPcZMpKhBiXmY8tJzSPk3+G4tqur4 6TYAm5ouitJsgAR61Cu7s+PNuq/pTLDhK+6/Njmc94NGBcRA4qTuysEGE79vYWP2oIAU4Fv6 gqaWHZ4MEI2XTqH8wiwzPdCQPYsSE0fXWiYu7ObeErT6iLSTZGx4rQARAQABiQIfBBgBCAAJ BQJbm6Q+AhsMAAoJEONU5rjiOLn4DDEP/RuyckW65SZcPG4cMfNgWxZF8rVjeVl/9PBfy01K 8R0hajU40bWtXSMiby7j0/dMjz99jN6L+AJHJvrLz4qYRzn2Ys843W+RfXj62Zde4YNBE5SL jJweRCbMWKaJLj6499fctxTyeb9+AMLQS4yRSwHuAZLmAb5AyCW1gBcTWZb8ON5BmWnRqeGm IgC1EvCnHy++aBnHTn0m+zV89BhTLTUal35tcjUFwluBY39R2ux/HNlBO1GY3Z+WYXhBvq7q katThLjaQSmnOrMhzqYmdShP1leFTVbzXUUIYv/GbynO/YrL2gaQpaP1bEUEi8lUAfXJbEWG dnHFkciryi092E8/9j89DJg4mmZqOau7TtUxjRMlBcIliXkzSLUk+QvD4LK1kWievJse4mte FBdkWHfP4BH/+8DxapRcG1UAheSnSRQ5LiO50annOB7oXF+vgKIaie2TBfZxQNGAs3RQ+bga DchCqFm5adiSP5+OT4NjkKUeGpBe/aRyQSle/RropTgCi85pje/juYEn2P9UAgkfBJrOHvQ9 Z+2Sva8FRd61NJLkCJ4LFumRn9wQlX2icFbi8UDV3do0hXJRRYTWCxrHscMhkrFWLhYiPF4i phX7UNdOWBQ90qpHyAxHmDazdo27gEjfvsgYMdveKknEOTEb5phwxWgg7BcIDoJf9UMC Message-ID: <6551fde1-e19c-3b97-7a53-5a4dcb97f7bc@linux.ibm.com> Date: Tue, 8 Sep 2020 15:09:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: <20200908130655.GF14136@osiris> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="2lqS40GK3SRE5oMpi6hZDXIojnrMFwXIo" X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-09-08_06:2020-09-08,2020-09-08 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 spamscore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 bulkscore=0 mlxscore=0 malwarescore=0 phishscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009080118 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --2lqS40GK3SRE5oMpi6hZDXIojnrMFwXIo Content-Type: multipart/mixed; boundary="sBopP0Ojt78REKHyuYgq7QGiWQqZqEZQY" --sBopP0Ojt78REKHyuYgq7QGiWQqZqEZQY Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 9/8/20 3:06 PM, Heiko Carstens wrote: > On Tue, Sep 08, 2020 at 09:05:04AM -0400, Janosch Frank wrote: >> Program exception 3f (secure storage violation) can only be detected >> when the CPU is running in SIE with a format 4 state description, >> e.g. running a protected guest. Because of this and because user >> space partly controls the guest memory mapping and can trigger this >> exception, we want to send a SIGSEGV to the process running the guest >> and not panic the kernel. >> >> Signed-off-by: Janosch Frank >> CC: # 5.7+ >> Fixes: 084ea4d611a3 ("s390/mm: add (non)secure page access exceptions = handlers") >> Reviewed-by: Claudio Imbrenda >> Reviewed-by: Cornelia Huck >> Acked-by: Christian Borntraeger >> --- >> arch/s390/kernel/entry.h | 1 + >> arch/s390/kernel/pgm_check.S | 2 +- >> arch/s390/mm/fault.c | 20 ++++++++++++++++++++ >> 3 files changed, 22 insertions(+), 1 deletion(-) >=20 > I guess this should go upstream via the s390 tree? Christian asked the exact same question. I think we picked the secure/non-secure exception handlers via the s390 tree so bringing these in via s390 would be in line with that. > Should I pick this up? That would be nice --sBopP0Ojt78REKHyuYgq7QGiWQqZqEZQY-- --2lqS40GK3SRE5oMpi6hZDXIojnrMFwXIo Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwGNS88vfc9+v45Yq41TmuOI4ufgFAl9XgoMACgkQ41TmuOI4 ufjLEg//QaXlmq2b+cwVWGYcuZonyMlyfKMSfdzv+f60wjq2J9j6/UdWtq6QG0DV bJoyAnnEFX8OSZpx2/87RiNJa6fWoZ2QOyX1DJnHudeI8LNvoVCuvxDaboFMMVg4 2jUMTsfbHXVywi0POxz3NmzYNDWSfVAMAzNz3V02vJxQaPvukM/Ye2qR+V7gStQq DguEQejBKZbQKm/Bi6/uKHG/ODT72L0i0e2ZykYLIT7GerY+aGTqq4opXK68Vgi/ 0mz48D8XMTes/B8qcFJRC7xqRyifdoh3ZzE7cI9NoS0OOyht4noOjCURittL/9ky a17J6c7vQK8lxQ6VWS1bETSQIGhNxbf8p/ccUgr9HfCymCTdBzYdfwF2jSSUfusN jYwtlcTqDHUtPwf+9TAY5Sj572fEUH1pnPYeE/myEl7KzIprVXOWfW2BqbQI2dGa Ahbol6Y8pmOQLPMpAXXBHxj1IwgwqXQeVBy4IpE1kcz1OQaUAFmx4XvOTIidtV2m xVsjpF+58irASInatosQuLWtcygx87vrnWI16V+J/ESiB344HLmxhkEwOhbOv62W 1rSZGjM1ugfHuv9b0j+33/BTNOXKmehts7afRcfdsYaKzwQ+PMuSnWRYpk7/yFJm HZ3RFPawJBN9yY6lgwkNYUNRDYqy63xrF4v+/Iqjo0lFBqBqodg= =ZzRB -----END PGP SIGNATURE----- --2lqS40GK3SRE5oMpi6hZDXIojnrMFwXIo--