From patchwork Tue Apr 13 08:07:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yanan Wang X-Patchwork-Id: 12199597 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 9B658C433ED for ; Tue, 13 Apr 2021 08:09:43 +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 4E2E460FE8 for ; Tue, 13 Apr 2021 08:09:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4E2E460FE8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:37048 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lWE7C-0006EF-5Q for qemu-devel@archiver.kernel.org; Tue, 13 Apr 2021 04:09:42 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43870) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWE5m-00049k-M5; Tue, 13 Apr 2021 04:08:14 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:5030) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lWE5h-0006Pv-Fc; Tue, 13 Apr 2021 04:08:14 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FKJ8H2l5fzlXcW; Tue, 13 Apr 2021 16:06:07 +0800 (CST) Received: from DESKTOP-TMVL5KK.china.huawei.com (10.174.187.128) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.498.0; Tue, 13 Apr 2021 16:07:51 +0800 From: Yanan Wang To: , Subject: [RFC PATCH v2 2/6] hw/arm/virt: DT: Add cpu-map Date: Tue, 13 Apr 2021 16:07:41 +0800 Message-ID: <20210413080745.33004-3-wangyanan55@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20210413080745.33004-1-wangyanan55@huawei.com> References: <20210413080745.33004-1-wangyanan55@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.128] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.32; envelope-from=wangyanan55@huawei.com; helo=szxga06-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=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 , Andrew Jones , "Michael S . Tsirkin" , wanghaibin.wang@huawei.com, Yanan Wang , Shannon Zhao , Alistair Francis , prime.zeng@hisilicon.com, yangyicong@huawei.com, yuzenghui@huawei.com, Igor Mammedov , zhukeqian1@huawei.com, Jiajie Li , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Andrew Jones Support device tree CPU topology descriptions. Signed-off-by: Andrew Jones Signed-off-by: Yanan Wang --- hw/arm/virt.c | 41 ++++++++++++++++++++++++++++++++++++++++- include/hw/arm/virt.h | 1 + 2 files changed, 41 insertions(+), 1 deletion(-) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 9f01d9041b..f4ae60ded9 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -352,10 +352,11 @@ static void fdt_add_cpu_nodes(const VirtMachineState *vms) int cpu; int addr_cells = 1; const MachineState *ms = MACHINE(vms); + const VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(vms); int smp_cpus = ms->smp.cpus; /* - * From Documentation/devicetree/bindings/arm/cpus.txt + * See Linux Documentation/devicetree/bindings/arm/cpus.yaml * On ARM v8 64-bit systems value should be set to 2, * that corresponds to the MPIDR_EL1 register size. * If MPIDR_EL1[63:32] value is equal to 0 on all CPUs @@ -408,8 +409,45 @@ static void fdt_add_cpu_nodes(const VirtMachineState *vms) ms->possible_cpus->cpus[cs->cpu_index].props.node_id); } + if (ms->smp.cpus > 1 && !vmc->no_cpu_topology) { + qemu_fdt_setprop_cell(ms->fdt, nodename, "phandle", + qemu_fdt_alloc_phandle(ms->fdt)); + } + g_free(nodename); } + + if (ms->smp.cpus > 1 && !vmc->no_cpu_topology) { + /* + * See Linux Documentation/devicetree/bindings/cpu/cpu-topology.txt + * In a SMP system, the hierarchy of CPUs is defined through four + * entities that are used to describe the layout of physical CPUs + * in the system: socket/cluster/core/thread. + */ + qemu_fdt_add_subnode(ms->fdt, "/cpus/cpu-map"); + + for (cpu = ms->smp.cpus - 1; cpu >= 0; cpu--) { + char *cpu_path = g_strdup_printf("/cpus/cpu@%d", cpu); + char *map_path; + + if (ms->smp.threads > 1) { + map_path = g_strdup_printf( + "/cpus/cpu-map/%s%d/%s%d/%s%d", + "socket", cpu / (ms->smp.cores * ms->smp.threads), + "core", (cpu / ms->smp.threads) % ms->smp.cores, + "thread", cpu % ms->smp.threads); + } else { + map_path = g_strdup_printf( + "/cpus/cpu-map/%s%d/%s%d", + "socket", cpu / ms->smp.cores, + "core", cpu % ms->smp.cores); + } + qemu_fdt_add_path(ms->fdt, map_path); + qemu_fdt_setprop_phandle(ms->fdt, map_path, "cpu", cpu_path); + g_free(map_path); + g_free(cpu_path); + } + } } static void fdt_add_its_gic_node(VirtMachineState *vms) @@ -2769,6 +2807,7 @@ static void virt_machine_5_2_options(MachineClass *mc) virt_machine_6_0_options(mc); compat_props_add(mc->compat_props, hw_compat_5_2, hw_compat_5_2_len); vmc->no_secure_gpio = true; + vmc->no_cpu_topology = true; } DEFINE_VIRT_MACHINE(5, 2) diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index 921416f918..4a4b98e4a7 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -129,6 +129,7 @@ struct VirtMachineClass { bool no_kvm_steal_time; bool acpi_expose_flash; bool no_secure_gpio; + bool no_cpu_topology; }; struct VirtMachineState {