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 178FDC4338F for ; Thu, 19 Aug 2021 13:38:37 +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 D4CA9610CF for ; Thu, 19 Aug 2021 13:38:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D4CA9610CF 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.168817.308260 (Exim 4.92) (envelope-from ) id 1mGiFT-0007dg-21; Thu, 19 Aug 2021 13:38:23 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 168817.308260; Thu, 19 Aug 2021 13:38:23 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGiFS-0007dZ-Us; Thu, 19 Aug 2021 13:38:22 +0000 Received: by outflank-mailman (input) for mailman id 168817; Thu, 19 Aug 2021 13:38:22 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGiFS-0007dT-2t for xen-devel@lists.xenproject.org; Thu, 19 Aug 2021 13:38:22 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mGiFR-0000Dr-1X; Thu, 19 Aug 2021 13:38:21 +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 1mGiFQ-0001bX-Rk; Thu, 19 Aug 2021 13:38:20 +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=9kGuUOVCZyqMQIsrKypF1g+S380JcqaobSUrK9HymaI=; b=sTALER8v4JETJ4f3sUWzd2WTx2 i2MrgTHdcqocpY2L6hUTmoULiR2dsMF1/NanDjag9rj8IHzAzjC4Hmm61/Zq4uqPCs3Mkpd7+nTF3 hcA57iURKWbW4NOwAcGi3dqnX3IRKsaCu6BrIXwfvDPr+gep2IOIrLbA7C4qJcdLMUOk=; Subject: Re: [XEN RFC PATCH 17/40] xen/arm: Introduce DEVICE_TREE_NUMA Kconfig for arm64 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> <20210811102423.28908-18-wei.chen@arm.com> From: Julien Grall Message-ID: <1fbcb8a6-67b6-e2d6-6524-cfce7a8a6557@xen.org> Date: Thu, 19 Aug 2021 14:38:18 +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: <20210811102423.28908-18-wei.chen@arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-GB Content-Transfer-Encoding: 7bit Hi, On 11/08/2021 11:24, Wei Chen wrote: > We need a Kconfig option to distinguish with ACPI based > NUMA. So we introduce the new Kconfig option: > DEVICE_TREE_NUMA in this patch for Arm64. > > Signed-off-by: Wei Chen > --- > xen/arch/arm/Kconfig | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig > index ecfa6822e4..678cc98ea3 100644 > --- a/xen/arch/arm/Kconfig > +++ b/xen/arch/arm/Kconfig > @@ -33,6 +33,16 @@ config ACPI > Advanced Configuration and Power Interface (ACPI) support for Xen is > an alternative to device tree on ARM64. > > +config DEVICE_TREE_NUMA The name suggests that NUMA should only be enabled for Device-Tree... But the description looks generic. However, I think the user should only have the choice to say whether they want NUMA to be enabled or not. We should not give them the choice to enable/disable the parsing for DT/ACPI. So we should have a generic config that will then select DT (and ACPI in the future). > + bool "NUMA (Non-Uniform Memory Access) Support (UNSUPPORTED)" if UNSUPPORTED > + depends on ARM_64 > + select NUMA > + ---help--- > + > + Non-Uniform Memory Access (NUMA) is a computer memory design used in > + multiprocessing, where the memory access time depends on the memory > + location relative to the processor. > + Cheers, -- Julien Grall