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Wed, 22 Jul 2020 08:06:40 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 29CC0A405C; Wed, 22 Jul 2020 08:06:40 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CEFE1A405B; Wed, 22 Jul 2020 08:06:39 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.169.63]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 22 Jul 2020 08:06:39 +0000 (GMT) Subject: Re: [PATCH 1/7] pc-bios: s390x: Fix bootmap.c zipl component entry data handling To: Christian Borntraeger , qemu-devel@nongnu.org References: <20200715094045.381984-1-frankja@linux.ibm.com> <20200715094045.381984-2-frankja@linux.ibm.com> <20d8b933-b37a-1ddb-4414-013eb4ec84f0@de.ibm.com> <80fa1441-588e-0f69-c8e5-df79a2e021fb@linux.ibm.com> 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: Date: Wed, 22 Jul 2020 10:06:39 +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: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="uQ24Wa3VUEKrVKiA4FUsneKfk18hGShOZ" X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-22_03:2020-07-22, 2020-07-22 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxlogscore=999 clxscore=1015 mlxscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007220056 Received-SPF: pass client-ip=148.163.158.5; envelope-from=frankja@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/22 02:43:19 X-ACL-Warn: Detected OS = Linux 3.x [generic] X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, cohuck@redhat.com, david@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --uQ24Wa3VUEKrVKiA4FUsneKfk18hGShOZ Content-Type: multipart/mixed; boundary="lA3TCzR1f1QnoG5YAt5j97LBp4Pnd9Pqg" --lA3TCzR1f1QnoG5YAt5j97LBp4Pnd9Pqg Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 7/22/20 9:33 AM, Christian Borntraeger wrote: >=20 >=20 > On 22.07.20 09:30, Janosch Frank wrote: >> On 7/22/20 8:50 AM, Christian Borntraeger wrote: >>> >>> >>> On 15.07.20 11:40, Janosch Frank wrote: >>>> The two main types of zipl component entries are execute and >>>> load/data. The last member of the component entry struct therefore >>>> denotes either a PSW or an address. Let's make this a bit more clear= >>>> by introducing a union and cleaning up the code that uses that struc= t >>>> member. >>>> >>>> The execute type component entries written by zipl contain short PSW= s, >>>> not addresses. Let's mask them and only pass the address part to >>>> jump_to_IPL_code(uint64_t address) because it expects an address as >>>> visible by the name of the argument. >>> >>> If zipl actually specifies a PSW, shouldnt we actually USE that PSW i= ncluding >>> the zipl specified mask? >> >> I expected the current approach to have some kind of meaning behind it= , >> if there isn't I'll be the first one to make it more sensible. > I think this was just something to make it work with Linux, especially = when Linux > still started in ESA mode.(So we faked a mask that is good enough to bo= ot Linux and > then used the address). But I think the proper solution is to really us= e the=20 > full PSW and go with that according to the CZAM rules.=20 >=20 Okay, I'll come up with a proper fix. --lA3TCzR1f1QnoG5YAt5j97LBp4Pnd9Pqg-- --uQ24Wa3VUEKrVKiA4FUsneKfk18hGShOZ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwGNS88vfc9+v45Yq41TmuOI4ufgFAl8X848ACgkQ41TmuOI4 ufj/6hAAtPLSTTn2Km0Ll5Gr4vYqRSoVERuH9071WFm4BuQBxvlljJgIyVqZRB5/ lI6SMdJY/08jYEff+Gzf5XeugeUtXAGTLn5sQ7HAIvXNFNziUCAaod7yqcx6bGZF 5OJB75sYkRDZc0d1jzrBQ+11L8Mb44v0Qli5LgOUp8ggAh8EKw4vea7yOVbyZ46l GtlCMhwsRXRa0KPVlpBEv9+P2ep9aW6A9qmO+xVagAAMW98IftKB933kFNnWRhuU rPEvOdP2TUXBuWyTn0/LEIDa9eCLuQYvz7ncqILk50uSu9Oyi0yTv9I//JI0CoAU NN6Bc+PVMxxAZlGbk/5skpl2EBP9AaUsfuqOzq4+VsaGEfc9ULwv9ce6KlDwTt9J WAZ/7QNzISJFSEgcZJ1DPbN6GRgNpuHaDO3kQixFMWdEgOtlNUfoXX8WLs1VF9hj 4r3cuWugnbLV7+7Vk5ZJWjNma9x5V+S+7/rJ010Y4sGNNEYKxRhnB0bLPCUdYJwl kBl05YJCAi4Tq00c78srrZkCfjQLBNvseLcuG3MqNJVPxN9lYm4awza8tWbKdZ4P YpBgw4MFXWLdpZlAy4m/goaVuhXYD8GC3qYe7J6wA5vz+QNRQzGXXl0wVnCkiR8E qCmYe2vuEchjxSsHaZ6ZHXFzftZOjUvm0lQYpvn2IpmIElkL8uA= =dqdF -----END PGP SIGNATURE----- --uQ24Wa3VUEKrVKiA4FUsneKfk18hGShOZ--