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Wed, 15 Jul 2020 09:27:08 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A304442045; Wed, 15 Jul 2020 09:27:08 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 162FD4203F; Wed, 15 Jul 2020 09:27:08 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.18.50]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 15 Jul 2020 09:27:08 +0000 (GMT) Subject: Re: [PATCH RFCv2 2/6] s390x/diag: no need to check for PGM_PRIVILEGED in diag308 To: David Hildenbrand , qemu-devel@nongnu.org References: <20200710151239.39370-1-david@redhat.com> <20200710151239.39370-3-david@redhat.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: <3ff6acea-d2ed-86a7-602c-39b2f4b43e99@linux.ibm.com> Date: Wed, 15 Jul 2020 11:27:07 +0200 User-Agent: Mozilla/5.0 (X11; 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Tsirkin" , Heiko Carstens , Cornelia Huck , Halil Pasic , Christian Borntraeger , qemu-s390x@nongnu.org, Claudio Imbrenda , Richard Henderson 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) --EzJJcJRrL6Fefqvkn6xnnMUOqO1PabMh0 Content-Type: multipart/mixed; boundary="T1dmbneoa7dk8vBkeP64GvuujMWhRMM6k" --T1dmbneoa7dk8vBkeP64GvuujMWhRMM6k Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 7/10/20 5:12 PM, David Hildenbrand wrote: > Whenever we reach this point via KVM or TCG, we already verified that w= e > are running in the supervisor state. >=20 > TCG checks this via IF_PRIV, KVM checks this directly in the diag > instruction handler, before exiting to userspace. >=20 > Signed-off-by: David Hildenbrand I'm trusting you on the tcg part. Acked-by: Janosch Frank > --- > target/s390x/diag.c | 5 ----- > 1 file changed, 5 deletions(-) >=20 > diff --git a/target/s390x/diag.c b/target/s390x/diag.c > index 1a48429564..be70aecd72 100644 > --- a/target/s390x/diag.c > +++ b/target/s390x/diag.c > @@ -80,11 +80,6 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1= , uint64_t r3, uintptr_t ra) > uint64_t subcode =3D env->regs[r3]; > IplParameterBlock *iplb; > =20 > - if (env->psw.mask & PSW_MASK_PSTATE) { > - s390_program_interrupt(env, PGM_PRIVILEGED, ra); > - return; > - } > - > if (subcode & ~0x0ffffULL) { > s390_program_interrupt(env, PGM_SPECIFICATION, ra); > return; >=20 --T1dmbneoa7dk8vBkeP64GvuujMWhRMM6k-- --EzJJcJRrL6Fefqvkn6xnnMUOqO1PabMh0 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwGNS88vfc9+v45Yq41TmuOI4ufgFAl8Oy+sACgkQ41TmuOI4 ufhrsA/+M+jCYBpvARD4le69iB/If2zIOoSDYj7Cq+2XtSCrKx/HRNN85l9eNBAe tRKB712VahwkyTxiATv7b1GjqbsIcji5eMijeXlFU/2WQG+EXopMS6wJSPW0kfaA OUVLY6nP7UNgmcdZGmcHVm9D/LbTaoFnYhzKSAsp1Ejpp0LJiuM22s5+ZISitXay Ul39oNSolQpcdSmkVycp6PzZ75BSlg/CIyZg7JjuG/V067eZn/HeDyIkrO7ELcMt bXsvIlxgRr+lrbTjIPG4U5K3x+vr6ethJO0g5A0bRZlfaM4g7XD6GB+Sz9TQHXnF X08isQfq5IXc3UbplItoENLORx3SOMNrsBnHnzKdrXKXKY6o+x8IqH27cDHznaPo kZnTBp02D6ZpClDEpSxm9QroAChGE89VrePXDUExbOSzkkExC9H8SD/esT53wIaq WUr/RQyQFm+aa0Gbkr4jJEczLAe4B7hq5K1dht9EWexdSbHlS3oqgf6PBmjw7OpC vSzhZF39ArqMaGcDq/E9wEBqu6FJERbv9w71mBD3P+Db/TQeHi3uDeAKwcQq67V8 u9+RsOuj8WNJmwICuv2lpAA3ihwevFrIqWuW+VdfXTyvWoX2Qv5tKDNl9GwhT+Ki lL2t31rYiEAzWAepnomjVJ7CEF60M0+KcF8HlUZ4eXdAjBLBPjw= =9Myu -----END PGP SIGNATURE----- --EzJJcJRrL6Fefqvkn6xnnMUOqO1PabMh0--