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=-8.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 EE8A6C282D7 for ; Sat, 2 Feb 2019 13:15:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BFA622173B for ; Sat, 2 Feb 2019 13:15:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MTfxvEmE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728022AbfBBNPI (ORCPT ); Sat, 2 Feb 2019 08:15:08 -0500 Received: from mail-pg1-f194.google.com ([209.85.215.194]:33588 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727977AbfBBNPH (ORCPT ); Sat, 2 Feb 2019 08:15:07 -0500 Received: by mail-pg1-f194.google.com with SMTP id z11so4299783pgu.0 for ; Sat, 02 Feb 2019 05:15:07 -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=3Ges32LHPg+2yzjDern7OBAJnkY60393Ywovq/o3kjw=; b=MTfxvEmE+hXJY0lJ45ZIj8c5fJkwyJzbbtA1EJXZshKcefjEqBFbw47Ehy7opXw7Ww jy59c1A2GXM0GWeD14ydsF8JrLEDHJMrN0TFN4GOsH3aEUqWIJZX8WHIdswHOfO+L5gh J2tekoHrz6fhzbEXtdARj2nKKeI4hOpHY5MvmOrrvXuAF8Vj4dqxfRj3Cc7oySAf5XyC sHMMsFbrsTJg4kX1XFVXlFsv/HLcBs4ghFdurHYeo7rxqN+Jr3m9Za/YxHr7Ylaslrwr LVhjA7UY4OLocCTWVtqhazsW7yLng3SwMEYIyI5Ib5kP3ywbpPJQN+23qlLOj9tKHFVr 1kQw== 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=3Ges32LHPg+2yzjDern7OBAJnkY60393Ywovq/o3kjw=; b=mb20LR06kEvmnKxRGfPcJhN+ViQMf095QSrbE/Cs1mWUpUfEVaYx3daU6e5+nUlcPq g8/0rNPiutbFGdtMFgeHYHTfx3N5Y8i0yhf2pCSVA2whkKtlqc0eS26uapUXxpaxQ3wb SDLOFtH8q2bcqQgmFeLZ8q8hw00HFEb6SuAwdsQeVMX4WTMdNU/pvPRI+S3wU/oGtMZo /FI90VpNt1dV/AmYmg2liZtSkec81zFa5R0Ibz730r0yhwH2dQS94ItvdmG4VdxpaIA5 PdaM8UKlMkhXBswbL1kDeNQsw5zz04Mcw6UD1A/VGjFQlE/7WaxpTTLEa/4v/JAF3ele iWUw== X-Gm-Message-State: AHQUAuYtd9jGpp+cIyWqvcwOZzHvWBIvn0syNlgoOR9FdgzVUys7kiaF 8bK4tHyZOgLIb3/NBGREMKc= X-Google-Smtp-Source: AHgI3IaKZedMLBzFn7A7B7vmYKUjUDPu37IqIfk4XemSoaovnA3iw7Y4DZm9MBemyp/6xUEUCPpaKA== X-Received: by 2002:a63:2141:: with SMTP id s1mr6143124pgm.148.1549113306855; Sat, 02 Feb 2019 05:15:06 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id g28sm15148045pfd.100.2019.02.02.05.15.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 02 Feb 2019 05:15:05 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , 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, akpm@linux-foundation.org, nicolas.ferre@microchip.com, arnd@arndb.de, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, iommu@lists.linux-foundation.org, michael.h.kelley@microsoft.com, vkuznets@redhat.com, alex.williamson@redhat.com, dan.carpenter@oracle.com Subject: [PATCH V2 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available Date: Sat, 2 Feb 2019 21:14:45 +0800 Message-Id: <1549113287-5606-2-git-send-email-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1549113287-5606-1-git-send-email-Tianyu.Lan@microsoft.com> References: <1549113287-5606-1-git-send-email-Tianyu.Lan@microsoft.com> To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. Signed-off-by: Lan Tianyu --- 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..4bd6d90 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_HYPERV_IOMMU) && x2apic_supported()) + x2apic_phys = 1; + #endif } -- 2.7.4