From patchwork Fri Oct 4 11:43:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 11174253 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 51848139A for ; Fri, 4 Oct 2019 11:44:27 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 28984222C9 for ; Fri, 4 Oct 2019 11:44:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 28984222C9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2A7696B000C; Fri, 4 Oct 2019 07:44:26 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 258FD6B000D; Fri, 4 Oct 2019 07:44:26 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1950B6B000E; Fri, 4 Oct 2019 07:44:26 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0250.hostedemail.com [216.40.44.250]) by kanga.kvack.org (Postfix) with ESMTP id E9A0C6B000C for ; Fri, 4 Oct 2019 07:44:25 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 760B2181AC9AE for ; Fri, 4 Oct 2019 11:44:25 +0000 (UTC) X-FDA: 76005919290.12.train92_438ede4bf2157 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jonathan.cameron@huawei.com,::linux-acpi@vger.kernel.org:linux-kernel@vger.kernel.org:linux-arm-kernel@lists.infradead.org:x86@kernel.org:keith.busch@intel.com:jglisse@redhat.com:rjw@rjwysocki.net:linuxarm@huawei.com:akpm@linux-foundation.org:dan.j.williams@intel.com:jonathan.cameron@huawei.com,RULES_HIT:30006:30012:30054,0,RBL:45.249.212.32:@huawei.com:.lbl8.mailshell.net-62.18.2.100 64.95.201.95,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: train92_438ede4bf2157 X-Filterd-Recvd-Size: 2815 Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by imf04.hostedemail.com (Postfix) with ESMTP for ; Fri, 4 Oct 2019 11:44:24 +0000 (UTC) Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 3AD602401994882FD419; Fri, 4 Oct 2019 19:44:20 +0800 (CST) Received: from lhrphicprd00229.huawei.com (10.123.41.22) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.439.0; Fri, 4 Oct 2019 19:44:12 +0800 From: Jonathan Cameron To: , , , , CC: Keith Busch , , "Rafael J . Wysocki" , , Andrew Morton , Dan Williams , Jonathan Cameron Subject: [PATCH V5 2/4] arm64: Support Generic Initiator only domains Date: Fri, 4 Oct 2019 19:43:28 +0800 Message-ID: <20191004114330.104746-3-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191004114330.104746-1-Jonathan.Cameron@huawei.com> References: <20191004114330.104746-1-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.41.22] X-CFilter-Loop: Reflected X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The one thing that currently needs doing from an architecture point of view is associating the GI domain with its nearest memory domain. This allows all the standard NUMA aware code to get a 'reasonable' answer. A clever driver might elect to do load balancing etc if there are multiple host / memory domains nearby, but that's a decision for the driver. Signed-off-by: Jonathan Cameron --- arch/arm64/kernel/smp.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index dc9fe879c279..fd7f6b1cdc84 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -713,6 +713,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) { int err; unsigned int cpu; + unsigned int node; unsigned int this_cpu; init_cpu_topology(); @@ -751,6 +752,13 @@ void __init smp_prepare_cpus(unsigned int max_cpus) set_cpu_present(cpu, true); numa_store_cpu_info(cpu); } + + /* + * Walk the numa domains and set the node to numa memory reference + * for any that are Generic Initiator Only. + */ + for_each_node_state(node, N_GENERIC_INITIATOR) + set_gi_numa_mem(node, local_memory_node(node)); } void (*__smp_cross_call)(const struct cpumask *, unsigned int);