From patchwork Wed Oct 6 10:22:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 12539045 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64100C433F5 for ; Wed, 6 Oct 2021 10:24:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id F1AEA61077 for ; Wed, 6 Oct 2021 10:24:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org F1AEA61077 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:39542 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mY466-00060g-6I for qemu-devel@archiver.kernel.org; Wed, 06 Oct 2021 06:24:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57756) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mY44m-0004KI-1G for qemu-devel@nongnu.org; Wed, 06 Oct 2021 06:23:04 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:52077) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mY44k-00044E-Ja for qemu-devel@nongnu.org; Wed, 06 Oct 2021 06:23:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633515780; 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=uyF/aTol2TckZJBIPUFu2KazCq/337t0uYgke3QkrH4=; b=IYjoDx0VaACPcP8EcBS/I3ztq+kogZe8nPzLBo2fVFF9/BdjJmdJwHmquL0qBz9mQ392Tr 8Ur7K5I0AP+WFI/3RpWUb9+0GHx8YrSQwE5wiLWvdVvf4PU5Q501KiLVA9sRFRHD+g7SzN Fugw7YWmnjFh54KgFMvGCSOF7937UL4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-243-Dp3I9n_BPAalL2QdPEEq5w-1; Wed, 06 Oct 2021 06:22:59 -0400 X-MC-Unique: Dp3I9n_BPAalL2QdPEEq5w-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 477EF19057A0; Wed, 6 Oct 2021 10:22:58 +0000 (UTC) Received: from gshan.redhat.com (vpn2-54-56.bne.redhat.com [10.64.54.56]) by smtp.corp.redhat.com (Postfix) with ESMTP id 739CF5F4EC; Wed, 6 Oct 2021 10:22:55 +0000 (UTC) From: Gavin Shan To: qemu-arm@nongnu.org Subject: [PATCH 2/2] hw/arm/virt: Don't create device-tree node for empty NUMA node Date: Wed, 6 Oct 2021 18:22:09 +0800 Message-Id: <20211006102209.6989-3-gshan@redhat.com> In-Reply-To: <20211006102209.6989-1-gshan@redhat.com> References: <20211006102209.6989-1-gshan@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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 Received-SPF: pass client-ip=216.205.24.124; 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=-0.066, 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_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, qemu-devel@nongnu.org, shan.gavin@gmail.com, ehabkost@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" The empty NUMA node, where no memory resides, are allowed. For example, the following command line specifies two empty NUMA nodes. With this, QEMU fails to boot because of the conflicting device-tree node names, as the following error message indicates. /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 \ -accel kvm -machine virt,gic-version=host \ -cpu host -smp 4,sockets=2,cores=2,threads=1 \ -m 1024M,slots=16,maxmem=64G \ -object memory-backend-ram,id=mem0,size=512M \ -object memory-backend-ram,id=mem1,size=512M \ -numa node,nodeid=0,cpus=0-1,memdev=mem0 \ -numa node,nodeid=1,cpus=2-3,memdev=mem1 \ -numa node,nodeid=2 \ -numa node,nodeid=3 : qemu-system-aarch64: FDT: Failed to create subnode /memory@80000000: FDT_ERR_EXISTS As specified by linux device-tree binding document, the device-tree nodes for these empty NUMA nodes shouldn't be generated. However, the corresponding NUMA node IDs should be included in the distance map device-tree node. This skips populating the device-tree nodes for these empty NUMA nodes to avoid the error, so that QEMU can be started successfully. Signed-off-by: Gavin Shan Reviewed-by: Andrew Jones --- hw/arm/boot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/arm/boot.c b/hw/arm/boot.c index 57efb61ee4..4e5898fcdc 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -603,6 +603,10 @@ int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo, mem_base = binfo->loader_start; for (i = 0; i < ms->numa_state->num_nodes; i++) { mem_len = ms->numa_state->nodes[i].node_mem; + if (!mem_len) { + continue; + } + rc = fdt_add_memory_node(fdt, acells, mem_base, scells, mem_len, i); if (rc < 0) {