From nobody Mon Feb 9 20:34:32 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1648983916175182.87761630651096; Sun, 3 Apr 2022 04:05:16 -0700 (PDT) Received: from localhost ([::1]:49662 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nay2l-0002kA-EM for importer@patchew.org; Sun, 03 Apr 2022 07:05:15 -0400 Received: from eggs.gnu.org ([209.51.188.92]:45858) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1naxys-0004kE-O4 for qemu-devel@nongnu.org; Sun, 03 Apr 2022 07:01:15 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:37299) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1naxyr-0001WJ-9l for qemu-devel@nongnu.org; Sun, 03 Apr 2022 07:01:14 -0400 Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-492-FccQGr8FNN6nZDrvNj6JFw-1; Sun, 03 Apr 2022 07:01:07 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 28351811E75; Sun, 3 Apr 2022 11:01:07 +0000 (UTC) Received: from gshan.redhat.com (ovpn-12-82.pek2.redhat.com [10.72.12.82]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9B8C940D02E1; Sun, 3 Apr 2022 11:01:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1648983672; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9W1VrdNopYHMYWbjYkVtU8hVkqQD8CSQBjT/xYI0fhc=; b=CsuIkCN917wpy3nTXE3t2srDdolDDdrF05zusizDMzlHHtA7DU4F+5LxcyYS7ulH2oO92W E0O1AagJMBGAbzyP+c85aEK+UUe5YlHLufm70rZ99qr/+W4OwslFIULIsl/4VDudsQs6MO HkmdhJ2lCwdZd4+186I4pnfdKbJ0mn8= X-MC-Unique: FccQGr8FNN6nZDrvNj6JFw-1 From: Gavin Shan To: qemu-arm@nongnu.org Subject: [PATCH v4 2/3] hw/arm/virt: Fix CPU's default NUMA node ID Date: Sun, 3 Apr 2022 19:00:35 +0800 Message-Id: <20220403110036.5531-3-gshan@redhat.com> In-Reply-To: <20220403110036.5531-1-gshan@redhat.com> References: <20220403110036.5531-1-gshan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=gshan@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=gshan@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, richard.henderson@linaro.org, qemu-devel@nongnu.org, zhenyzha@redhat.com, wangyanan55@huawei.com, shan.gavin@gmail.com, imammedo@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1648983917563100001 Content-Type: text/plain; charset="utf-8" When CPU-to-NUMA association isn't explicitly provided by users, the default on is given by mc->get_default_cpu_node_id(). However, the CPU topology isn't fully considered in the default association and this causes CPU topology broken warnings on booting Linux guest. For example, the following warning messages are observed when the Linux guest is booted with the following command lines. /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ -accel kvm -machine virt,gic-version=3Dhost \ -cpu host \ -smp 6,sockets=3D2,cores=3D3,threads=3D1 \ -m 1024M,slots=3D16,maxmem=3D64G \ -object memory-backend-ram,id=3Dmem0,size=3D128M \ -object memory-backend-ram,id=3Dmem1,size=3D128M \ -object memory-backend-ram,id=3Dmem2,size=3D128M \ -object memory-backend-ram,id=3Dmem3,size=3D128M \ -object memory-backend-ram,id=3Dmem4,size=3D128M \ -object memory-backend-ram,id=3Dmem4,size=3D384M \ -numa node,nodeid=3D0,memdev=3Dmem0 \ -numa node,nodeid=3D1,memdev=3Dmem1 \ -numa node,nodeid=3D2,memdev=3Dmem2 \ -numa node,nodeid=3D3,memdev=3Dmem3 \ -numa node,nodeid=3D4,memdev=3Dmem4 \ -numa node,nodeid=3D5,memdev=3Dmem5 : alternatives: patching kernel code BUG: arch topology borken the CLS domain not a subset of the MC domain BUG: arch topology borken the DIE domain not a subset of the NODE domain With current implementation of mc->get_default_cpu_node_id(), CPU#0 to CPU#5 are associated with NODE#0 to NODE#5 separately. That's incorrect because CPU#0/1/2 should be associated with same NUMA node because they're seated in same socket. This fixes the issue by considering the socket ID when the default CPU-to-NUMA association is provided in virt_possible_cpu_arch_ids(). With this applied, no more CPU topology broken warnings are seen from the Linux guest. The 6 CPUs are associated with NODE#0/1, but there are no CPUs associated with NODE#2/3/4/5. Signed-off-by: Gavin Shan Reviewed-by: Igor Mammedov --- hw/arm/virt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index f628e86f78..558bd59e8b 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -2497,7 +2497,9 @@ virt_cpu_index_to_props(MachineState *ms, unsigned cp= u_index) =20 static int64_t virt_get_default_cpu_node_id(const MachineState *ms, int id= x) { - return idx % ms->numa_state->num_nodes; + int64_t socket_id =3D ms->possible_cpus->cpus[idx].props.socket_id; + + return socket_id % ms->numa_state->num_nodes; } =20 static const CPUArchIdList *virt_possible_cpu_arch_ids(MachineState *ms) --=20 2.23.0