Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2226345/?format=api
{ "id": 2226345, "url": "http://patchwork.ozlabs.org/api/patches/2226345/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422-arm-v1-1-106a9a9e22dd@rsg.ci.i.u-tokyo.ac.jp/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/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": "<20260422-arm-v1-1-106a9a9e22dd@rsg.ci.i.u-tokyo.ac.jp>", "list_archive_url": null, "date": "2026-04-22T12:13:26", "name": "target/arm/kvm: Mark host feature cache valid last", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "be962cbb33a19800b05c218298917259137215f6", "submitter": { "id": 90980, "url": "http://patchwork.ozlabs.org/api/people/90980/?format=api", "name": "Akihiko Odaki", "email": "odaki@rsg.ci.i.u-tokyo.ac.jp" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422-arm-v1-1-106a9a9e22dd@rsg.ci.i.u-tokyo.ac.jp/mbox/", "series": [ { "id": 501000, "url": "http://patchwork.ozlabs.org/api/series/501000/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501000", "date": "2026-04-22T12:13:26", "name": "target/arm/kvm: Mark host feature cache valid last", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501000/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226345/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226345/checks/", "tags": {}, "related": [], "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=fail reason=\"key not found in DNS\" header.d=rsg.ci.i.u-tokyo.ac.jp\n header.i=@rsg.ci.i.u-tokyo.ac.jp header.a=rsa-sha256 header.s=rs20250326\n header.b=K5Y+q+NE;\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 4g0yps61KCz1y2d\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 22:15:16 +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 1wFWT5-0003XN-Rl; Wed, 22 Apr 2026 08:14:12 -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 <odaki@rsg.ci.i.u-tokyo.ac.jp>)\n id 1wFWSv-0003WC-VD; Wed, 22 Apr 2026 08:14:03 -0400", "from www3579.sakura.ne.jp ([49.212.243.89])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <odaki@rsg.ci.i.u-tokyo.ac.jp>)\n id 1wFWSt-0003VK-6C; Wed, 22 Apr 2026 08:14:01 -0400", "from h205.csg.ci.i.u-tokyo.ac.jp (h205.csg.ci.i.u-tokyo.ac.jp\n [133.11.54.205]) (authenticated bits=0)\n by www3579.sakura.ne.jp (8.16.1/8.16.1) with ESMTPSA id 63MCDTNX030696\n (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO);\n Wed, 22 Apr 2026 21:13:47 +0900 (JST)\n (envelope-from odaki@rsg.ci.i.u-tokyo.ac.jp)" ], "DKIM-Signature": "a=rsa-sha256; bh=c6f8xHZahEQDw28PGKsEGeLYdPm2CEUuNXUGAafH/bE=;\n c=relaxed/relaxed; d=rsg.ci.i.u-tokyo.ac.jp;\n h=From:Message-Id:To:Subject:Date;\n s=rs20250326; t=1776860027; v=1;\n b=K5Y+q+NEM9CIQi34hFmbkuZOigsKb3+zWv5nzi9VKx5LXXaUAAL6Y1NgK4lBjMEJ\n jLNYXhfgj8a8Ab9qMNxdYDRbEKorOdX8Ut4GUGI+UeId/7g85j1VszVX6UoP+ru0\n drQFgaLj6tjh0zeQjpCxxMn2NHQ7offGRKyeVu5CYjJmcF2G+eG+DXIv2dgF15Ze\n OqnovCytaaDKIQKabeR4PBhWktf6nffKZ+dqZRuw10Hk9C/cuBIaSUQjdFEiO6Bm\n 8TPxHuIXugT4nAlIZzC7UYt9mbibwaztojjLBJe7V4Ws9hJnHZ4RS10oJsB6zgCN\n TF+7ohEPHxzG/UnsJw/Wwg==", "From": "Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>", "Date": "Wed, 22 Apr 2026 21:13:26 +0900", "Subject": "[PATCH] target/arm/kvm: Mark host feature cache valid last", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Message-Id": "<20260422-arm-v1-1-106a9a9e22dd@rsg.ci.i.u-tokyo.ac.jp>", "X-B4-Tracking": "v=1; b=H4sIAAAAAAAC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE\n vPSU3UzU4B8JSMDIzMDEyMj3cSiXF0LkyQj45TEFANTM0MloMqCotS0zAqwKdGxEH5xaVJWanI\n JSKtSbS0AP/7gvWcAAAA=", "X-Change-ID": "20260422-arm-84b23dad0561", "To": "qemu-devel@nongnu.org", "Cc": "Peter Maydell <peter.maydell@linaro.org>,\n Paolo Bonzini <pbonzini@redhat.com>, qemu-arm@nongnu.org,\n kvm@vger.kernel.org, Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>", "X-Mailer": "b4 0.16-dev-16047", "Received-SPF": "pass client-ip=49.212.243.89;\n envelope-from=odaki@rsg.ci.i.u-tokyo.ac.jp; helo=www3579.sakura.ne.jp", "X-Spam_score_int": "-16", "X-Spam_score": "-1.7", "X-Spam_bar": "-", "X-Spam_report": "(-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_INVALID=0.1,\n DKIM_SIGNED=0.1, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=no 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_arm_set_cpu_features_from_host() treats dtb_compatible as the host\nfeature cache valid bit, but kvm_arm_get_host_cpu_features() set it\nbefore later register reads could fail.\n\nSet target and dtb_compatible only after the feature data is complete.\n\nSigned-off-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>\n---\nThis fixes a semantic issue I found while writing the next version of [1].\nI am not aware of any case where it manifests as a real bug.\n\n[1] http://lore.kernel.org/qemu-devel/20260225-kvm-v2-1-b8d743db0f73@rsg.ci.i.u-tokyo.ac.jp/\n(\"[PATCH RFC v2] target/arm/kvm: Choose PMU backend\")\n---\n target/arm/kvm.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)\n\n\n---\nbase-commit: 98b060da3a4f92b2a994ead5b16a87e783baf77c\nchange-id: 20260422-arm-84b23dad0561\n\nBest regards,\n-- \nAkihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>", "diff": "diff --git a/target/arm/kvm.c b/target/arm/kvm.c\nindex d4a68874b880..03c3346d50ed 100644\n--- a/target/arm/kvm.c\n+++ b/target/arm/kvm.c\n@@ -329,8 +329,6 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)\n return false;\n }\n \n- ahcf->target = init.target;\n- ahcf->dtb_compatible = \"arm,armv8\";\n int fd = fdarray[2];\n \n err = get_host_cpu_reg(fd, ahcf, ID_AA64PFR0_EL1_IDX);\n@@ -472,6 +470,8 @@ static bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)\n }\n \n ahcf->features = features;\n+ ahcf->target = init.target;\n+ ahcf->dtb_compatible = \"arm,armv8\";\n \n return true;\n }\n", "prefixes": [] }