From patchwork Wed Oct 6 10:22:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 12539049 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 1DA23C433F5 for ; Wed, 6 Oct 2021 10:28:20 +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 9EB8561177 for ; Wed, 6 Oct 2021 10:28:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9EB8561177 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]:43920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mY49q-0000hI-Od for qemu-devel@archiver.kernel.org; Wed, 06 Oct 2021 06:28:18 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57946) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mY46E-0006sX-MO for qemu-devel@nongnu.org; Wed, 06 Oct 2021 06:24:34 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:22283) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mY46C-0005Dd-RW for qemu-devel@nongnu.org; Wed, 06 Oct 2021 06:24:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633515871; 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=Yhs34EERipMHpCaWkNf7UUhwHsfLDbqmjf/5Y2UztuE=; b=HXJMRGy7u9yCAnBINiYHicfj7eIbuF1vNzYpyjHibtdm88r7IIUr9NOYO4F2Np9Hp5PXvk ZhuSSFCgQkPoNZQcWjJ9KsPTwSVI2q4DuXOkqKKmpJ+FSz4OhaODWuBfEdVzAVxsRTAA/C Jv9Sx3snvfkPWcstvwfMSR9GDTlxm7g= 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-304-KCdPwbqNMfO1SlsshvoWoA-1; Wed, 06 Oct 2021 06:22:56 -0400 X-MC-Unique: KCdPwbqNMfO1SlsshvoWoA-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 DFEEE108468E; Wed, 6 Oct 2021 10:22:54 +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 E696C5F4E7; Wed, 6 Oct 2021 10:22:51 +0000 (UTC) From: Gavin Shan To: qemu-arm@nongnu.org Subject: [PATCH 1/2] numa: Set default distance map if needed Date: Wed, 6 Oct 2021 18:22:08 +0800 Message-Id: <20211006102209.6989-2-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=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=-0.066, 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=ham 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 following option is used to specify the distance map. It's possible the option isn't provided by user. In this case, the distance map isn't populated and exposed to platform. On the other hand, the empty NUMA node, where no memory resides, is allowed on ARM64 virt platform. For these empty NUMA nodes, their corresponding device-tree nodes aren't populated, but their NUMA IDs should be included in the "/distance-map" device-tree node, so that kernel can probe them properly if device-tree is used. -numa,dist,src=,dst=,val= So when user doesn't specify distance map, we need to generate the default distance map, where the local and remote distances are 10 and 20 separately. This adds an extra parameter to the exiting complete_init_numa_distance() to generate the default distance map for this case. Signed-off-by: Gavin Shan --- hw/core/numa.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/hw/core/numa.c b/hw/core/numa.c index 510d096a88..fdb3a4aeca 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -594,7 +594,7 @@ static void validate_numa_distance(MachineState *ms) } } -static void complete_init_numa_distance(MachineState *ms) +static void complete_init_numa_distance(MachineState *ms, bool is_default) { int src, dst; NodeInfo *numa_info = ms->numa_state->nodes; @@ -609,6 +609,8 @@ static void complete_init_numa_distance(MachineState *ms) if (numa_info[src].distance[dst] == 0) { if (src == dst) { numa_info[src].distance[dst] = NUMA_DISTANCE_MIN; + } else if (is_default) { + numa_info[src].distance[dst] = NUMA_DISTANCE_DEFAULT; } else { numa_info[src].distance[dst] = numa_info[dst].distance[src]; } @@ -716,13 +718,20 @@ void numa_complete_configuration(MachineState *ms) * A->B != distance B->A, then that means the distance table is * asymmetric. In this case, the distances for both directions * of all node pairs are required. + * + * The default node pair distances, which are 10 and 20 for the + * local and remote nodes separatly, are provided if user doesn't + * specify any node pair distances. */ if (ms->numa_state->have_numa_distance) { /* Validate enough NUMA distance information was provided. */ validate_numa_distance(ms); /* Validation succeeded, now fill in any missing distances. */ - complete_init_numa_distance(ms); + complete_init_numa_distance(ms, false); + } else { + complete_init_numa_distance(ms, true); + ms->numa_state->have_numa_distance = true; } } }