From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EC60BC4338F for ; Thu, 19 Aug 2021 18:09:55 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 B481260F5E for ; Thu, 19 Aug 2021 18:09:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B481260F5E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.169023.308735 (Exim 4.92) (envelope-from ) id 1mGmTy-0000kF-7E; Thu, 19 Aug 2021 18:09:38 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 169023.308735; Thu, 19 Aug 2021 18:09:38 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGmTy-0000k8-2y; Thu, 19 Aug 2021 18:09:38 +0000 Received: by outflank-mailman (input) for mailman id 169023; Thu, 19 Aug 2021 18:09:36 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGmTw-0000k2-PD for xen-devel@lists.xenproject.org; Thu, 19 Aug 2021 18:09:36 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGmTv-0006CM-Hi; Thu, 19 Aug 2021 18:09:35 +0000 Received: from [54.239.6.188] (helo=a483e7b01a66.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1mGmTv-0005Fq-BN; Thu, 19 Aug 2021 18:09:35 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:Content-Type:In-Reply-To: MIME-Version:Date:Message-ID:From:References:Cc:To:Subject; bh=Gk2cLUzwj3ImuGllLbXl2EDB6i2rz+wiaOxxETw+y9M=; b=B6+daN4rder8kpswxAwnoO2KdG PWxTZ/15SVqVJiyB5qoMjxluGM25SeoOF8jQTGG6qILatah7TJZYuJBnLB3XqUhvgLvJtrZHT6Okw 8AOSyqcvOiIGOT1Uge1pe89H7NhIT2pQxPR5n1Rzpt793sa7ZGAdqciy3U9DNFHrwC1w=; Subject: Re: [XEN RFC PATCH 22/40] xen/arm: introduce a helper to parse device tree processor node To: Wei Chen , xen-devel@lists.xenproject.org, sstabellini@kernel.org, jbeulich@suse.com Cc: Bertrand.Marquis@arm.com References: <20210811102423.28908-1-wei.chen@arm.com> <20210811102423.28908-23-wei.chen@arm.com> From: Julien Grall Message-ID: Date: Thu, 19 Aug 2021 19:09:33 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 MIME-Version: 1.0 In-Reply-To: <20210811102423.28908-23-wei.chen@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Hi Wei, On 11/08/2021 11:24, Wei Chen wrote: > Processor NUMA ID information is stored in device tree's processor > node as "numa-node-id". We need a new helper to parse this ID from > processor node. If we get this ID from processor node, this ID's > validity still need to be checked. Once we got a invalid NUMA ID > from any processor node, the device tree will be marked as NUMA > information invalid. > > Signed-off-by: Wei Chen > --- > xen/arch/arm/numa_device_tree.c | 41 +++++++++++++++++++++++++++++++-- > 1 file changed, 39 insertions(+), 2 deletions(-) > > diff --git a/xen/arch/arm/numa_device_tree.c b/xen/arch/arm/numa_device_tree.c > index 1c74ad135d..37cc56acf3 100644 > --- a/xen/arch/arm/numa_device_tree.c > +++ b/xen/arch/arm/numa_device_tree.c > @@ -20,16 +20,53 @@ > #include > #include > #include > +#include > +#include > > s8 device_tree_numa = 0; > +static nodemask_t processor_nodes_parsed __initdata; > > -int srat_disabled(void) > +static int srat_disabled(void) > { > return numa_off || device_tree_numa < 0; > } > > -void __init bad_srat(void) > +static __init void bad_srat(void) > { > printk(KERN_ERR "DT: NUMA information is not used.\n"); > device_tree_numa = -1; > } > + > +/* Callback for device tree processor affinity */ > +static int __init dtb_numa_processor_affinity_init(nodeid_t node) > +{ > + if ( srat_disabled() ) > + return -EINVAL; > + else if ( node == NUMA_NO_NODE || node >= MAX_NUMNODES ) { > + bad_srat(); > + return -EINVAL; You seem to have a mix of soft and hard tab in this file. Is there a lot of the code that was directly copied from Linux? If not, then the file should be using Xen coding style. > + } > + > + node_set(node, processor_nodes_parsed); > + > + device_tree_numa = 1; > + printk(KERN_INFO "DT: NUMA node %u processor parsed\n", node); > + > + return 0; > +} > + > +/* Parse CPU NUMA node info */ > +int __init device_tree_parse_numa_cpu_node(const void *fdt, int node) AFAICT, you are going to turn this helper static in a follow-up patch. This is a bad practice. Instead, the function should be static from the beginning. If it is not possible, then you should re-order the code. In this case, I think you can add the boilerplate to parse the NUMA information (patch #25) here and then extend it in each patch. > +{ > + uint32_t nid; > + > + nid = device_tree_get_u32(fdt, node, "numa-node-id", MAX_NUMNODES); > + printk(XENLOG_WARNING "CPU on NUMA node:%u\n", nid); > + if ( nid >= MAX_NUMNODES ) > + { > + printk(XENLOG_WARNING "Node id %u exceeds maximum value\n", nid); > + return -EINVAL; > + } > + > + return dtb_numa_processor_affinity_init(nid); > +} > Cheers, -- Julien Grall