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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5ED1EC4360F for ; Tue, 26 Feb 2019 12:08:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3246321852 for ; Tue, 26 Feb 2019 12:08:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qZXMAOF+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726795AbfBZMHo (ORCPT ); Tue, 26 Feb 2019 07:07:44 -0500 Received: from mail-pl1-f195.google.com ([209.85.214.195]:34675 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728070AbfBZMHn (ORCPT ); Tue, 26 Feb 2019 07:07:43 -0500 Received: by mail-pl1-f195.google.com with SMTP id d15so6171694plr.1; Tue, 26 Feb 2019 04:07:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=qU1GABYYyeuPRZGX8LPlndQ7q8L8YfsCQ19TD+5FHqc=; b=qZXMAOF+D6SCoEM+v2PEd8vxnfcBFFbYa8iiwhgGDOSZofWuj+lzIoVy6LUyQlhq2s U91FXDhq6AcC4Oq93WoME0GPHCupoh+h70f/qR+FZ2LDt/xoS0bP1JvcqY8VLK0l69PA OrN7CRbkXvP99wezM4e73XB4Kd4iIEmDjxiJ8eWf8MkHftPltUmI8Em4OBa3Fdb5zfR1 DP7v0eIrZnuVNFodlhGu9l/OO6Gu8+wReKUAISiQpH6VxgpzkUsc3mSVPephrCtnsDhI TowgLt+zXZJoM9oGGU2xRZRq08HAAg2WjvbqJVAjMosOdRjnwXagyZm7fEPoC1acGrNe 4OSA== 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; bh=qU1GABYYyeuPRZGX8LPlndQ7q8L8YfsCQ19TD+5FHqc=; b=MbOKdgtug5BJ6FZiAQCKLWeQUVWT2TF/S3CmS9il8Sbb3NP5EBqPu5zRB5fRInSTor ErPNDXChdUrY29zLh5US7o9a/dyP4z0zVkusl72xf9RuBDdIzNG8BZK6nNXXr+O6F36j L/uShm36ubrAxMBWEOHFFgUlthxRhNXSsFa0Xeq5plU/Oq8OXa+s4pYcgvaBY8rDVei9 mL4hpSVCRnMvBYN0TLYib9ZtKh6ZyUwj3TJhlaFP2YnkvYtCDNTefzalAkirvgF9/Lgz ug6+/4j4Alrrm24rJrUXwrWVozea2iQ4mEQ/h9O1RkWNMLKIUmKU1zAyjw10AeLY1UmV IOUw== X-Gm-Message-State: AHQUAua/kgj5qDTApuJPBLW+JmqhpqwEMNFMdtdgJGTEU/Jjjzp55/sH IcFTI7P4xYRBJeBrL61LJeFzRV2g X-Google-Smtp-Source: AHgI3Iajo/2Za+PSZHrYfraGQ2jzZC6VGQ6gc07Rk5zmAxKvwkIN/nNmZLMxDbglUJujWiEDeSj3cg== X-Received: by 2002:a17:902:1101:: with SMTP id d1mr25034824pla.19.1551182863114; Tue, 26 Feb 2019 04:07:43 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id e21sm30889423pfh.45.2019.02.26.04.07.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 26 Feb 2019 04:07:42 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, sashal@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org, joro@8bytes.org, mchehab+samsung@kernel.org, davem@davemloft.net, gregkh@linuxfoundation.org, nicolas.ferre@microchip.com, arnd@arndb.de, michael.h.kelley@microsoft.com, vkuznets@redhat.com, alex.williamson@redhat.com, dan.carpenter@oracle.com Cc: Lan Tianyu , linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, iommu@lists.linux-foundation.org, linux-hyperv@vger.kernel.org Subject: [Resend PATCH V5 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available Date: Tue, 26 Feb 2019 20:07:18 +0800 Message-Id: <1551182840-15069-2-git-send-email-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1551182840-15069-1-git-send-email-Tianyu.Lan@microsoft.com> References: <1551182840-15069-1-git-send-email-Tianyu.Lan@microsoft.com> Sender: linux-hyperv-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Lan Tianyu Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic, set x2apic destination mode to physcial mode when x2apic is available and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs have 8-bit APIC id. Reviewed-by: Thomas Gleixner Reviewed-by: Michael Kelley Signed-off-by: Lan Tianyu --- Change since v2: - Fix compile error due to x2apic_phys - Fix comment indent Change since v1: - Remove redundant extern for x2apic_phys --- arch/x86/kernel/cpu/mshyperv.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index e81a2db..0c29e4e 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -328,6 +328,16 @@ static void __init ms_hyperv_init_platform(void) # ifdef CONFIG_SMP smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; # endif + + /* + * Hyper-V doesn't provide irq remapping for IO-APIC. To enable x2apic, + * set x2apic destination mode to physcial mode when x2apic is available + * and Hyper-V IOMMU driver makes sure cpus assigned with IO-APIC irqs + * have 8-bit APIC id. + */ + if (IS_ENABLED(CONFIG_X86_X2APIC) && x2apic_supported()) + x2apic_phys = 1; + #endif } -- 2.7.4