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{ "id": 833278, "url": "http://patchwork.ozlabs.org/api/1.2/covers/833278/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20171102103559.7382-1-luc.michel@git.antfield.fr/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/projects/14/?format=api", "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": "<20171102103559.7382-1-luc.michel@git.antfield.fr>", "list_archive_url": null, "date": "2017-11-02T10:35:58", "name": "[0/1] target-ppc: booke206 tlb: fix tlbwe instruction", "submitter": { "id": 71520, "url": "http://patchwork.ozlabs.org/api/1.2/people/71520/?format=api", "name": "Luc MICHEL", "email": "luc.michel@git.antfield.fr" }, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/cover/20171102103559.7382-1-luc.michel@git.antfield.fr/mbox/", "series": [ { "id": 11469, "url": "http://patchwork.ozlabs.org/api/1.2/series/11469/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=11469", "date": "2017-11-02T10:35:58", "name": "target-ppc: booke206 tlb: fix tlbwe instruction", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/11469/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/833278/comments/", "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "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=<UNKNOWN>)", "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 3ySM142llgz9t30\n\tfor <incoming@patchwork.ozlabs.org>;\n\tThu, 2 Nov 2017 21:35:18 +1100 (AEDT)", "from localhost ([::1]:59552 helo=lists.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.71) (envelope-from\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>)\n\tid 1eACqB-0007Pj-8A\n\tfor incoming@patchwork.ozlabs.org; Thu, 02 Nov 2017 06:35:15 -0400", "from eggs.gnu.org ([2001:4830:134:3::10]:50891)\n\tby lists.gnu.org with esmtp (Exim 4.71)\n\t(envelope-from <luc.michel@git.antfield.fr>) id 1eACph-0007PW-HF\n\tfor qemu-devel@nongnu.org; Thu, 02 Nov 2017 06:34:46 -0400", "from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)\n\t(envelope-from <luc.michel@git.antfield.fr>) id 1eACpe-0005Xr-BX\n\tfor qemu-devel@nongnu.org; Thu, 02 Nov 2017 06:34:45 -0400", "from bee.antfield.fr ([188.165.75.195]:36556)\n\tby eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32)\n\t(Exim 4.71) (envelope-from <luc.michel@git.antfield.fr>)\n\tid 1eACpe-0005WI-6L; Thu, 02 Nov 2017 06:34:42 -0400" ], "From": "Luc MICHEL <luc.michel@git.antfield.fr>", "To": "qemu-devel@nongnu.org", "Date": "Thu, 2 Nov 2017 11:35:58 +0100", "Message-Id": "<20171102103559.7382-1-luc.michel@git.antfield.fr>", "X-Mailer": "git-send-email 2.14.3", "X-detected-operating-system": "by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic]\n\t[fuzzy]", "X-Received-From": "188.165.75.195", "Subject": "[Qemu-devel] [PATCH 0/1] target-ppc: booke206 tlb: fix tlbwe\n\tinstruction", "X-BeenThere": "qemu-devel@nongnu.org", "X-Mailman-Version": "2.1.21", "Precedence": "list", "List-Id": "<qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<http://lists.nongnu.org/archive/html/qemu-devel/>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n\t<mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Cc": "David Gibson <david@gibson.dropbear.id.au>, qemu-ppc@nongnu.org,\n\tAlexander Graf <agraf@suse.de>, Luc MICHEL <luc.michel@git.antfield.fr>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "\"Qemu-devel\"\n\t<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>" }, "content": "Hi,\n\nI was experiencing random segmentation faults of userland applications\nin a guest e500 powerpc Linux. After investigating, I found that this\nbug appeared with commit 9fb044911444fdd09f5f072ad0ca269d7f8b841d. This\ncommit introduces more MMU indices to avoid unnecessary TLB flushes when\nthe CPU changes mode.\n\nIt triggers a new bug however, that I finally traced down into the tlbwe\ninstructions simulation. When replacing a valid TLB entry with a new\none, the previous page was not flushed from QEMU TLB.\n\nThis fixes my random crashes in guest Linux. Note that I think there is\na similar issue in booke206_invalidate_ea_tlb but in my case, Linux\nnever triggers this code so I was not able to test.\n\nLuc MICHEL (1):\n target-ppc: Fix booke206 tlbwe TLB instruction\n\n target/ppc/mmu_helper.c | 23 ++++++++++++++++++-----\n 1 file changed, 18 insertions(+), 5 deletions(-)" }