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=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 4B71DC43331 for ; Wed, 6 Jan 2021 20:34:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 272AA23132 for ; Wed, 6 Jan 2021 20:34:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727536AbhAFUes (ORCPT ); Wed, 6 Jan 2021 15:34:48 -0500 Received: from mail-wm1-f54.google.com ([209.85.128.54]:51212 "EHLO mail-wm1-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727497AbhAFUeq (ORCPT ); Wed, 6 Jan 2021 15:34:46 -0500 Received: by mail-wm1-f54.google.com with SMTP id v14so3451202wml.1; Wed, 06 Jan 2021 12:34:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=rN/0fuFHwVfj55c/MsJ39TIimzupnKoIy4FjFz+d0q8=; b=ss0j/JncKwSkW85blDKA0KdsCTyMZNhTG6n/ij3HIuvtLlx6n0+CqLxfuVMzr/zG/e nPdWKmL1xOMzGAec6ea5WGvvb+JtKMQv7XDPUnSyzGXOVt5UN9cjtM8J2KyW7MAMFFAY 6n4eLD83vV6XE+4CSHKplk0Z5RaOvp3aJV/IzUqWprvMVzzENvDDk54kGrO/h1TS5sSU mNJYOofLgReZyrd/bZRdCFSZeuU762ydbXIuNnDWThw2Urp7WmEqcRNza24KY7l0SrdP yrNsTi+H/wAU0VP8n9x9zCCjGeVHiJHp0yTVzHLQIBNU2CyC91sHP0heZrw7Lu+PLcd5 zPRA== X-Gm-Message-State: AOAM532tNbtF5twXP09Z+XJlNqTeakkWpCJESAvQRzxxBFbPS2RSIz9Y A00JP7rvnvXu4djRd4FyRtqvkXl/XUM= X-Google-Smtp-Source: ABdhPJzPmKt4VR5c1TEB4qE/szweYQL5hAHLcLxHSdGRUWdz8dDQMpdvsTx9swqCzq6LyLm61UuATw== X-Received: by 2002:a1c:5402:: with SMTP id i2mr5384686wmb.12.1609965244266; Wed, 06 Jan 2021 12:34:04 -0800 (PST) Received: from liuwe-devbox-debian-v2.j3c5onc20sse1dnehy4noqpfcg.zx.internal.cloudapp.net ([51.145.34.42]) by smtp.gmail.com with ESMTPSA id u9sm4499456wmb.32.2021.01.06.12.34.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jan 2021 12:34:03 -0800 (PST) From: Wei Liu To: Linux on Hyper-V List Cc: virtualization@lists.linux-foundation.org, Linux Kernel List , Michael Kelley , Vineeth Pillai , Sunil Muthuswamy , Nuno Das Neves , Wei Liu , Lillian Grassin-Drake , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H. Peter Anvin" Subject: [PATCH v4 10/17] x86/hyperv: implement and use hv_smp_prepare_cpus Date: Wed, 6 Jan 2021 20:33:43 +0000 Message-Id: <20210106203350.14568-11-wei.liu@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210106203350.14568-1-wei.liu@kernel.org> References: <20210106203350.14568-1-wei.liu@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Microsoft Hypervisor requires the root partition to make a few hypercalls to setup application processors before they can be used. Signed-off-by: Lillian Grassin-Drake Signed-off-by: Sunil Muthuswamy Co-Developed-by: Lillian Grassin-Drake Co-Developed-by: Sunil Muthuswamy Signed-off-by: Wei Liu --- CPU hotplug and unplug is not yet supported in this setup, so those paths remain untouched. v3: Always call native SMP preparation function. --- arch/x86/kernel/cpu/mshyperv.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index c376d191a260..13d3b6dd21a3 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -31,6 +31,7 @@ #include #include #include +#include /* Is Linux running as the root partition? */ bool hv_root_partition; @@ -212,6 +213,32 @@ static void __init hv_smp_prepare_boot_cpu(void) hv_init_spinlocks(); #endif } + +static void __init hv_smp_prepare_cpus(unsigned int max_cpus) +{ +#ifdef CONFIG_X86_64 + int i; + int ret; +#endif + + native_smp_prepare_cpus(max_cpus); + +#ifdef CONFIG_X86_64 + for_each_present_cpu(i) { + if (i == 0) + continue; + ret = hv_call_add_logical_proc(numa_cpu_node(i), i, cpu_physical_id(i)); + BUG_ON(ret); + } + + for_each_present_cpu(i) { + if (i == 0) + continue; + ret = hv_call_create_vp(numa_cpu_node(i), hv_current_partition_id, i, i); + BUG_ON(ret); + } +#endif +} #endif static void __init ms_hyperv_init_platform(void) @@ -368,6 +395,8 @@ static void __init ms_hyperv_init_platform(void) # ifdef CONFIG_SMP smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; + if (hv_root_partition) + smp_ops.smp_prepare_cpus = hv_smp_prepare_cpus; # endif /* -- 2.20.1