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 A2F40C169C4 for ; Thu, 31 Jan 2019 10:18:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6EABE218AF for ; Thu, 31 Jan 2019 10:18:02 +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="nXo23dZ7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731989AbfAaKSB (ORCPT ); Thu, 31 Jan 2019 05:18:01 -0500 Received: from mail-pl1-f194.google.com ([209.85.214.194]:42533 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726368AbfAaKSA (ORCPT ); Thu, 31 Jan 2019 05:18:00 -0500 Received: by mail-pl1-f194.google.com with SMTP id y1so1265984plp.9 for ; Thu, 31 Jan 2019 02:18:00 -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=GSsa4cz53oK4WF704GByADPLNT6tPN3u1p6vSHbfrH0=; b=nXo23dZ7OHQQZPyZEOFHELGs+L3NsKm1T/rJepsLrs/uWQDRH1cXF7/Y2vDZZ6opPX O6H+j4on0WszASrumIy4LwBp+WfaW0HErCxhEbbK9S7U7g+ATI7vT8gdkPT/KqL48ZIk WbXUkjjmeU7rHKUu88RZt27dvr5HXfmiAe0LLu5SPm4HFJs/AlFtQB6Z3IGjx7FmhYMv Z2c+i/frcf9ZF7p7J8kQo4c+xOaKn2KAHkDiKr5JPy8bM0PuMGIs6Jyh+COF4Nn50GAz ryr+D2Xj00QQ6IyeOLrgH+5DSRueXPBWFN5Sm8NRc8+9IeTB3StAiciuJsy9R7yWxH5h Bf/w== 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=GSsa4cz53oK4WF704GByADPLNT6tPN3u1p6vSHbfrH0=; b=bqg8IxT99QFjhfTqdwthrhGoAQ5rQbH8nq+5v50AIBd/JVdxH4+EngV80AwDibLums zs5YjjDU9VINjK1qarH+7T+qnXDz6J05aqcru3n7hfllzeqJ4FoHAuWKJTWSsmqvxmcu DMBe0mUilE0oYzSJGut143P84pi/VL3ntpELAMbP1PCs+fk2s7CjIrq0Npgv3VD4GlGl ETf4HB3Pl2Lu68Q0rG/E0iQhf1MddutivcbVXXNGffGkIub3F/7nqZxHLmmXWklq2rnX Xd2pmPIUS3cdHEXh5NulZcI6/wLiKcMffqTZOAJ8qyCrw2LL9K9Fxsxe7l1ziA6bwoxN CixQ== X-Gm-Message-State: AJcUukdXfbdNNv/tOmf7phAvPOEKa3NzIwLyjSPULRHOMxWWRNKZu4pz pcaERLpgJLs2gTKT2A5fFDQ= X-Google-Smtp-Source: ALg8bN6QMux67Vz9RpngaUnVEfeNMgm0+lhB9fkoKjLncZ33u0psX5H8gFimARY6NgQI4JQ7Bjt7eQ== X-Received: by 2002:a17:902:2f03:: with SMTP id s3mr33478433plb.277.1548929879976; Thu, 31 Jan 2019 02:17:59 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id p67sm5944830pfg.44.2019.01.31.02.17.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 31 Jan 2019 02:17:59 -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 Subject: [PATCH 1/3] x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available Date: Thu, 31 Jan 2019 18:17:31 +0800 Message-Id: <1548929853-25877-2-git-send-email-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1548929853-25877-1-git-send-email-Tianyu.Lan@microsoft.com> References: <1548929853-25877-1-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 --- arch/x86/kernel/cpu/mshyperv.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index e81a2db..9d62f33 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -36,6 +36,8 @@ struct ms_hyperv_info ms_hyperv; EXPORT_SYMBOL_GPL(ms_hyperv); +extern int x2apic_phys; + #if IS_ENABLED(CONFIG_HYPERV) static void (*vmbus_handler)(void); static void (*hv_stimer0_handler)(void); @@ -328,6 +330,18 @@ 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. + */ +# if IS_ENABLED(CONFIG_HYPERV_IOMMU) + if (x2apic_supported()) + x2apic_phys = 1; +# endif + #endif } -- 2.7.4