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GET /api/1.1/patches/2222411/?format=api
{ "id": 2222411, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2222411/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260411131806.94653-1-mohamed@unpredictable.fr/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260411131806.94653-1-mohamed@unpredictable.fr>", "date": "2026-04-11T13:18:06", "name": "hw/intc: apic: stop register accesses for invalid situations", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "6585ef04a1f1285be77ac67d756710ee109417b2", "submitter": { "id": 91318, "url": "http://patchwork.ozlabs.org/api/1.1/people/91318/?format=api", "name": "Mohamed Mediouni", "email": "mohamed@unpredictable.fr" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260411131806.94653-1-mohamed@unpredictable.fr/mbox/", "series": [ { "id": 499556, "url": "http://patchwork.ozlabs.org/api/1.1/series/499556/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499556", "date": "2026-04-11T13:18:06", "name": "hw/intc: apic: stop register accesses for invalid situations", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499556/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2222411/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2222411/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=bvf2a8I4;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4ftDld4Btcz1yCx\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 11 Apr 2026 23:19:08 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wBYEG-0007V1-N0; Sat, 11 Apr 2026 09:18:28 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mohamed@unpredictable.fr>)\n id 1wBYE9-0007Sh-29\n for qemu-devel@nongnu.org; Sat, 11 Apr 2026 09:18:22 -0400", "from p-west3-cluster3-host9-snip4-8.eps.apple.com ([57.103.72.239]\n helo=outbound.ms.icloud.com)\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mohamed@unpredictable.fr>)\n id 1wBYE6-0005qU-2G\n for qemu-devel@nongnu.org; Sat, 11 Apr 2026 09:18:20 -0400", "from outbound.ms.icloud.com (unknown [127.0.0.2])\n by p00-icloudmta-asmtp-us-west-3a-100-percent-8 (Postfix) with ESMTPS id\n A93DE18002A3; Sat, 11 Apr 2026 13:18:11 +0000 (UTC)", "from localhost.localdomain (unknown [17.57.154.37])\n by p00-icloudmta-asmtp-us-west-3a-100-percent-8 (Postfix) with ESMTPSA id\n C991F18000D0; Sat, 11 Apr 2026 13:18:09 +0000 (UTC)" ], "Dkim-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=unpredictable.fr;\n s=sig1; t=1775913493; x=1778505493;\n bh=lF0jdyfsX2D7PN9TMkL5HOWX7JJ7u8+26yUNFPoFu10=;\n h=From:To:Subject:Date:Message-ID:MIME-Version:x-icloud-hme;\n b=bvf2a8I4RiHONEStDVJCoqvu+3ACapA8894YJW/R74tMZHFpA/UZ9Xj77lFPgpGZfqxSlQOvCRSNPsomN5/+aJZymtfAv+Hx6iv2QrnOJ3UXDKzqcJwRmqJ5+B3WQVygpfRRlzPuQJQx2flusRSTwZDSzVsDNxNCaEj13vGIwfGkv5rQ8bkbtAy4pT5SovKBa5Uz+RBGwr0DqbSENvefYFhZ7QWGpWumULIBvJ4rwDKwzRr5uOTO518Np/RItkeNdrcB0DRSZepwG+Ah1fL5gPXOigYJ3oetAOYM2pM0ekwfLNqjON4uJZ6OfJPe8/ijBLVNse5mixydfZeRNEoRgg==", "mail-alias-created-date": "1752046281608", "From": "Mohamed Mediouni <mohamed@unpredictable.fr>", "To": "qemu-devel@nongnu.org", "Cc": "Paolo Bonzini <pbonzini@redhat.com>,\n \"Michael S. Tsirkin\" <mst@redhat.com>,\n Mohamed Mediouni <mohamed@unpredictable.fr>", "Subject": "[PATCH] hw/intc: apic: stop register accesses for invalid situations", "Date": "Sat, 11 Apr 2026 15:18:06 +0200", "Message-ID": "<20260411131806.94653-1-mohamed@unpredictable.fr>", "X-Mailer": "git-send-email 2.50.1", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDExMDExMyBTYWx0ZWRfX6KuJnfN+jstx\n 6j+i1jvrST3m/ebDjNlLd3H5cNhqGcT4WVN8/SPkO4uwquQi6zi4ALnQZckV2g6p7WDvWn3/GBj\n 3y4aGuxYsMsQ5k/6BmhNocJkianZiGqqZa1m0zhMkq/fXi/f5YW4LmMJ1MTCP00rjNL4T4IZkOu\n OuScpcYR17UvWoQsGPvzE/oV4ejyfrmwz6UnMj6wDoJqBMU+OM28uPxtdv9eIvwViWeTdn+ukN0\n BVXj9/cE8E9jDrTiotau+zGrpMr54csY2DL/2OiCJLOZo+aV3lkmUFFivYfuYRzIPRpyLBHrL4Y\n qCfKX4KheKLgym4XAIsip9bgUSFmHTomMjECbWMbFwkl9Dvhuu8oO16EXqrw4o=", "X-Proofpoint-GUID": "gokvfFS0J8BPtV1u1cNTx0UxKfmIr46a", "X-Proofpoint-ORIG-GUID": "gokvfFS0J8BPtV1u1cNTx0UxKfmIr46a", "X-Authority-Info-Out": "v=2.4 cv=F9lat6hN c=1 sm=1 tr=0 ts=69da4a14\n cx=c_apl:c_pps:t_out a=qkKslKyYc0ctBTeLUVfTFg==:117 a=A5OVakUREuEA:10\n a=VkNPw1HP01LnGYTKEx00:22 a=zBtDF0ibdIbUSHW8crcA:9", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-11_03,2026-04-09_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=notspam policy=default score=0 spamscore=0\n phishscore=0 mlxscore=0 clxscore=1030 suspectscore=0 lowpriorityscore=0\n malwarescore=0 bulkscore=0 mlxlogscore=821 adultscore=0 classifier=spam\n authscore=0 adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000\n definitions=main-2604110113", "Received-SPF": "pass client-ip=57.103.72.239;\n envelope-from=mohamed@unpredictable.fr; helo=outbound.ms.icloud.com", "X-Spam_score_int": "-20", "X-Spam_score": "-2.1", "X-Spam_bar": "--", "X-Spam_report": "(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-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": "2.1.29", "Precedence": "list", "List-Id": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://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 <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "kvm-unit-tests's apic.c tests for:\n\n!APICBASE_ENABLE + attempting to read xAPIC registers is not an allowed\n combination.\n\nAnd neither is x2APIC enabled + attempting to read xAPIC registers\n\nThis was tested on WHPX with kernel-irqchip=off with x2APIC emulation\nenabled (in a posted series) and TCG.\n\nSigned-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>\n---\n hw/intc/apic.c | 9 +++++++++\n 1 file changed, 9 insertions(+)", "diff": "diff --git a/hw/intc/apic.c b/hw/intc/apic.c\nindex 8766ed00b9..c09dddef39 100644\n--- a/hw/intc/apic.c\n+++ b/hw/intc/apic.c\n@@ -875,6 +875,15 @@ static uint64_t apic_mem_read(void *opaque, hwaddr addr, unsigned size)\n return -1;\n }\n \n+ /* if the xAPIC is disabled, return early. */\n+ if (!(s->apicbase & MSR_IA32_APICBASE_ENABLE)) {\n+ return 0xffffffff;\n+ }\n+\n+ if (s->apicbase & MSR_IA32_APICBASE_EXTD) {\n+ return 0xffffffff;\n+ }\n+\n index = (addr >> 4) & 0xff;\n apic_register_read(s, index, &val);\n \n", "prefixes": [] }