{"id":818773,"url":"http://patchwork.ozlabs.org/api/covers/818773/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20170926183318.12995-1-david@redhat.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":"","list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170926183318.12995-1-david@redhat.com>","list_archive_url":null,"date":"2017-09-26T18:33:12","name":"[v1,0/6] s390x/tcg: fix some accesses using low address","submitter":{"id":70402,"url":"http://patchwork.ozlabs.org/api/people/70402/?format=json","name":"David Hildenbrand","email":"david@redhat.com"},"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20170926183318.12995-1-david@redhat.com/mbox/","series":[{"id":5209,"url":"http://patchwork.ozlabs.org/api/series/5209/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=5209","date":"2017-09-26T18:33:12","name":"s390x/tcg: fix some accesses using low address","version":1,"mbox":"http://patchwork.ozlabs.org/series/5209/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/818773/comments/","headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=nongnu.org\n\t(client-ip=2001:4830:134:3::11; helo=lists.gnu.org;\n\tenvelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n\treceiver=)","ext-mx05.extmail.prod.ext.phx2.redhat.com;\n\tdmarc=none (p=none dis=none) header.from=redhat.com","ext-mx05.extmail.prod.ext.phx2.redhat.com;\n\tspf=fail smtp.mailfrom=david@redhat.com"],"Received":["from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11])\n\t(using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y1qNf4JKRz9t3h\n\tfor ;\n\tWed, 27 Sep 2017 04:34:10 +1000 (AEST)","from localhost ([::1]:50665 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t)\n\tid 1dwugK-0004O7-Js\n\tfor incoming@patchwork.ozlabs.org; Tue, 26 Sep 2017 14:34:08 -0400","from eggs.gnu.org ([2001:4830:134:3::10]:45087)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from ) id 1dwufd-0004Ld-IC\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 14:33:26 -0400","from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from ) id 1dwufa-0003Qx-Fj\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 14:33:25 -0400","from mx1.redhat.com ([209.132.183.28]:57684)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from ) id 1dwufa-0003Qk-A9\n\tfor qemu-devel@nongnu.org; Tue, 26 Sep 2017 14:33:22 -0400","from smtp.corp.redhat.com\n\t(int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby mx1.redhat.com (Postfix) with ESMTPS id 5BA942F944D;\n\tTue, 26 Sep 2017 18:33:21 +0000 (UTC)","from t460s.redhat.com (ovpn-117-152.ams2.redhat.com\n\t[10.36.117.152])\n\tby smtp.corp.redhat.com (Postfix) with ESMTP id C9419614C5;\n\tTue, 26 Sep 2017 18:33:19 +0000 (UTC)"],"DMARC-Filter":"OpenDMARC Filter v1.3.2 mx1.redhat.com 5BA942F944D","From":"David Hildenbrand ","To":"qemu-devel@nongnu.org","Date":"Tue, 26 Sep 2017 20:33:12 +0200","Message-Id":"<20170926183318.12995-1-david@redhat.com>","X-Scanned-By":"MIMEDefang 2.79 on 10.5.11.13","X-Greylist":"Sender IP whitelisted, not delayed by milter-greylist-4.5.16\n\t(mx1.redhat.com [10.5.110.29]);\n\tTue, 26 Sep 2017 18:33:21 +0000 (UTC)","X-detected-operating-system":"by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]","X-Received-From":"209.132.183.28","Subject":"[Qemu-devel] [PATCH v1 0/6] s390x/tcg: fix some accesses using low\n\taddress","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.21","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"Christian Borntraeger , thuth@redhat.com,\n\tcohuck@redhat.com, Alexander Graf ,\n\tRichard Henderson ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"\"Qemu-devel\"\n\t"},"content":"Conny reported that a guest Linux currently spits out:\n \"The s390-virtio transport is deprecated. Please switch to a modern host\n providing virtio-ccw.\"\n\nThis is strange, because we have no legacy virtio transport in QEMU :)\n\nMain problem is, that a page is tested for acccess, and the test does not\nfail. All memory access variants like stb_phys() will never fail. On\ninvalid memory, they simply do nothing.\n\nLinux uses lura for this check. Let's introduce a _real MMU that handles\nprefixing and can later be used for things like low address protection.\n\nThe other BUG is that a check for invalid memory is wrong. Therefore,\nPatch 1 alone makes the guest crash when trying to initialize the\nvirtio transport. Crazy stuff.\n\nDavid Hildenbrand (6):\n s390x/tcg: fix checking for invalid memory check\n s390x/tcg: add MMU for real addresses\n s390x/tcg: make lura(g) use the new _real mmu.\n s390x/tcg: make stora(g) use the new _real mmu\n s390x/tcg: make testblock use the new _real mmu\n s390x/tcg: make idte/ipte use the new _real mmu\n\n target/s390x/cpu.h | 4 +++-\n target/s390x/excp_helper.c | 29 +++++++++++++++++++----------\n target/s390x/internal.h | 2 ++\n target/s390x/mem_helper.c | 36 +++++++++++-------------------------\n target/s390x/mmu_helper.c | 19 +++++++++++++++++++\n target/s390x/translate.c | 4 ----\n 6 files changed, 54 insertions(+), 40 deletions(-)"}