From patchwork Tue Jun 7 08:08:13 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen \(ThunderTown\)" X-Patchwork-Id: 69475 Delivered-To: patch@linaro.org Received: by 10.140.106.246 with SMTP id e109csp1855510qgf; Tue, 7 Jun 2016 01:14:12 -0700 (PDT) X-Received: by 10.66.4.129 with SMTP id k1mr29426864pak.45.1465287251983; Tue, 07 Jun 2016 01:14:11 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 5si33699195pfd.163.2016.06.07.01.14.11; Tue, 07 Jun 2016 01:14:11 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932158AbcFGIN5 (ORCPT + 31 others); Tue, 7 Jun 2016 04:13:57 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:60152 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751547AbcFGIIo (ORCPT ); Tue, 7 Jun 2016 04:08:44 -0400 Received: from 172.24.1.136 (EHLO szxeml428-hub.china.huawei.com) ([172.24.1.136]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DIH93162; Tue, 07 Jun 2016 16:08:38 +0800 (CST) Received: from localhost (10.177.23.164) by szxeml428-hub.china.huawei.com (10.82.67.183) with Microsoft SMTP Server id 14.3.235.1; Tue, 7 Jun 2016 16:08:30 +0800 From: Zhen Lei To: Catalin Marinas , Will Deacon , linux-arm-kernel , Ganapatrao Kulkarni , Robert Richter , "David Daney" , Rob Herring , "Frank Rowand" , Grant Likely , devicetree , linux-kernel CC: Zefan Li , Xinwei Hu , "Tianhong Ding" , Hanjun Guo , Zhen Lei Subject: [PATCH v4 09/14] arm64/numa: support HAVE_SETUP_PER_CPU_AREA Date: Tue, 7 Jun 2016 16:08:13 +0800 Message-ID: <1465286898-13828-10-git-send-email-thunder.leizhen@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1465286898-13828-1-git-send-email-thunder.leizhen@huawei.com> References: <1465286898-13828-1-git-send-email-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.23.164] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090205.57568107.00C9, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 29bef1ff9c7be0e756925920d9eb7320 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To make each percpu area allocated from its local numa node. Without this patch, all percpu areas will be allocated from the node which cpu0 belongs to. Signed-off-by: Zhen Lei --- arch/arm64/Kconfig | 8 ++++++++ arch/arm64/mm/numa.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 64 insertions(+) -- 2.5.0 diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 76747d9..05c1bf1 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -573,6 +573,14 @@ config USE_PERCPU_NUMA_NODE_ID def_bool y depends on NUMA +config HAVE_SETUP_PER_CPU_AREA + def_bool y + depends on NUMA + +config NEED_PER_CPU_EMBED_FIRST_CHUNK + def_bool y + depends on NUMA + source kernel/Kconfig.preempt source kernel/Kconfig.hz diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index 8be5ba3..99401aa 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -25,6 +25,8 @@ #include #include +#include + struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; EXPORT_SYMBOL(node_data); nodemask_t numa_nodes_parsed __initdata; @@ -129,6 +131,60 @@ void __init early_map_cpu_to_node(unsigned int cpu, int nid) cpu_to_node_map[cpu] = nid; } +#ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA +unsigned long __per_cpu_offset[NR_CPUS] __read_mostly; +EXPORT_SYMBOL(__per_cpu_offset); + +static int __init early_cpu_to_node(int cpu) +{ + return cpu_to_node_map[cpu]; +} + +static int __init pcpu_cpu_distance(unsigned int from, unsigned int to) +{ + if (early_cpu_to_node(from) == early_cpu_to_node(to)) + return LOCAL_DISTANCE; + else + return REMOTE_DISTANCE; +} + +static void * __init pcpu_fc_alloc(unsigned int cpu, size_t size, + size_t align) +{ + int nid = early_cpu_to_node(cpu); + + return memblock_virt_alloc_try_nid(size, align, + __pa(MAX_DMA_ADDRESS), MEMBLOCK_ALLOC_ACCESSIBLE, nid); +} + +static void __init pcpu_fc_free(void *ptr, size_t size) +{ + memblock_free_early(__pa(ptr), size); +} + +void __init setup_per_cpu_areas(void) +{ + unsigned long delta; + unsigned int cpu; + int rc; + + /* + * Always reserve area for module percpu variables. That's + * what the legacy allocator did. + */ + rc = pcpu_embed_first_chunk(PERCPU_MODULE_RESERVE, + PERCPU_DYNAMIC_RESERVE, PAGE_SIZE, + pcpu_cpu_distance, + pcpu_fc_alloc, pcpu_fc_free); + if (rc < 0) + panic("Failed to initialize percpu areas."); + + delta = (unsigned long)pcpu_base_addr - (unsigned long)__per_cpu_start; + for_each_possible_cpu(cpu) + __per_cpu_offset[cpu] = delta + pcpu_unit_offsets[cpu]; +} +#endif + /** * numa_add_memblk - Set node id to memblk * @nid: NUMA node ID of the new memblk