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,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 0610FC43381 for ; Wed, 27 Feb 2019 14:54:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C7634217F5 for ; Wed, 27 Feb 2019 14:54:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="SMR2I1vR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730573AbfB0Oyk (ORCPT ); Wed, 27 Feb 2019 09:54:40 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:43605 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729257AbfB0Oyk (ORCPT ); Wed, 27 Feb 2019 09:54:40 -0500 Received: by mail-pg1-f193.google.com with SMTP id l11so8065343pgq.10; Wed, 27 Feb 2019 06:54:39 -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=BAaU3SCjEVdf5o/jF2bCzRsTcKRKt2DHscF4H08IKCc=; b=SMR2I1vRBZ+TyLLwZEhjNH8iZgGkSKHxRLllk7CbdKJteNqUu5gmkJ/2aWMjFQ/Eoi UOlBsRgUd7K/pB/ZMXaLYyhJFsqN56YrZK29YKZCNN9X973NZz05FgdVpRhusMz4TfhS mrztKfvudmutSZf1KhNuNTTDQrWQloMSE0DpRAfJqp2PBNUCuFvkcQcwnrJpZCPuI0Nn l57a27SXZg4FJllxdUwy/NQkYrKhX/gnGAg2Aff24o6hUf5PxAaylZNcKNuvHnJFv9OX MIvZatt1ddJCiDdfqvzLsi+D1fZe/0TU8JSKtt4q8Gto8ojebfUUoutjaCyaBs+26xwX 8xjg== 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=BAaU3SCjEVdf5o/jF2bCzRsTcKRKt2DHscF4H08IKCc=; b=EwsO2gGGgFgwGolbIOzNZDgCcLRzucVQWilarz91hQ9xkGnDdMb3jXbwTi/5EMlx/M Y4RMFczgO68wn00vXjqICo6ikRdMUEr7nYBRFtWkS22bWi6ZX8Jr8FpC45mcxG5ploNa BcOmdMM+wy2Go3e6pJBWsCH+qj93Aid7xDx9Pxn3NdtB2vp88E6v3oRgU3MqNjuMucij D8rpON2PJCvo/ROcLBUDwUVqv1IFJus9sqdHj6FT4qgt9YryvxbTd+okeZKwtF3/Fg7b jvbC1D6Rbjc73Z2V1gTtqhGW41g1DY0VUALPHFRvuELMCOacSDGLVlkxnRc6+17UwUc0 FZEw== X-Gm-Message-State: AHQUAuajGSKBdmbqeY0ESlW52fnGkS2ys3MqnF/1TEf9e3o1yjrP5fr6 tHRJbmbyChZFSMOJeoOcj90= X-Google-Smtp-Source: AHgI3Iaa0EMl4uSNw5IKlXSebQc8zVeao+tC90YxRtHHHdzENLLI8UP3TmpZrPrRjaFpRYw20iz/Kw== X-Received: by 2002:a65:4806:: with SMTP id h6mr3365142pgs.408.1551279279466; Wed, 27 Feb 2019 06:54:39 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id 63sm29618135pfy.110.2019.02.27.06.54.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 27 Feb 2019 06:54:38 -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, davem@davemloft.net, mchehab+samsung@kernel.org, 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: [PATCH V6 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available Date: Wed, 27 Feb 2019 22:54:03 +0800 Message-Id: <1551279245-25888-2-git-send-email-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1551279245-25888-1-git-send-email-Tianyu.Lan@microsoft.com> References: <1551279245-25888-1-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 v5: - Fix comile error due to x2apic_phys 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 | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index e81a2db..3fa238a 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -328,6 +328,18 @@ 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. + */ +# ifdef CONFIG_X86_X2APIC + if (x2apic_supported()) + x2apic_phys = 1; +# endif + #endif } -- 2.7.4