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=-2.7 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 A0423C169C4 for ; Thu, 31 Jan 2019 10:17:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71740218AF for ; Thu, 31 Jan 2019 10:17:56 +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="YWJnTQuC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731830AbfAaKRy (ORCPT ); Thu, 31 Jan 2019 05:17:54 -0500 Received: from mail-pl1-f196.google.com ([209.85.214.196]:33133 "EHLO mail-pl1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726368AbfAaKRy (ORCPT ); Thu, 31 Jan 2019 05:17:54 -0500 Received: by mail-pl1-f196.google.com with SMTP id z23so1286761plo.0 for ; Thu, 31 Jan 2019 02:17:53 -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; bh=RoOAYP00CJcOcCAZPnZiRQwx0NYD5yfmYBG5B5dDX60=; b=YWJnTQuCgOMIMlMVLwhtinm7X33G33heYNvLafQLJhMldvljWSQ+kP+a5BO4TGwjOr 68uF14bKXcGDDAzFZdssOF9I/yQ5Q6efG4g6WGMd3LMMxUiNkNA+PJPRI+NYNxmt9lww BVYYtnrYLI2w16OI9Njxh409GcoqJ3I1SlWUM/6nusAM5oh16upKuVyx4g8nDrRrBCZR o5k3FtSOhhL7qsKogLHy0E0o998TJLps0NqyRDxMFPUrFllBsu1OFVt3xmOwbglQ9TQ6 eP90/dV8u/wKv/e5yf95qexo7McyhreiYrs1MV/CSso3G6MO62cVnwxabKU9BYDfDVBk McrQ== 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; bh=RoOAYP00CJcOcCAZPnZiRQwx0NYD5yfmYBG5B5dDX60=; b=q7iwAyPD5hoPoZ8a2qE7hlfwUPYCQ46F6mQ3e6Da2XNDWT/HB4fMZZOOoQvCCwiiH9 1OI0+X5aGpy1a7cZfkGSYZ538qgCcI+mvIn47rD3HrD9cOW8eQbwZXntcKhpfAqE9Pba esXzjKNDD3cvnadSZWs0/1zPSI2IC5eIK/RDUNP/JCL50IVYBnJaCC5T/oxD2ifksi3x Lx2xiuJbQp6LqFUB2DB4V+oEIxvaQr+Kc5xKwLzdmuQCCFHGt2J/IJtpSksO7LCYVlhE CZeYZHLOtSy4Deh+x0yV/1pBPOat4oGNXEt6uaqywcTs0+KzeyN9zX6PJIXqvP/l4YO7 Yu7Q== X-Gm-Message-State: AJcUukdlPQ7ClQ1NokxI2Q7+UJmnK88a8AbuTaMgUXNOJTlB2JScW8HL qMCe/m3G3BB38c6+tRz+FZQ= X-Google-Smtp-Source: ALg8bN6UUi7pPJT0RP72mAzIqM2QmOdB091kzRkZ9to47QVEIz970dYs7wSMKU9Msd+jEdAIhGQhOA== X-Received: by 2002:a17:902:2a66:: with SMTP id i93mr33598489plb.113.1548929873633; Thu, 31 Jan 2019 02:17:53 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id p67sm5944830pfg.44.2019.01.31.02.17.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 31 Jan 2019 02:17:52 -0800 (PST) From: lantianyu1986@gmail.com X-Google-Original-From: Tianyu.Lan@microsoft.com Cc: Lan Tianyu , akpm@linux-foundation.org, arnd@arndb.de, bp@alien8.de, davem@davemloft.net, devel@linuxdriverproject.org, gregkh@linuxfoundation.org, haiyangz@microsoft.com, hpa@zytor.com, iommu@lists.linux-foundation.org, joro@8bytes.org, kys@microsoft.com, linux-kernel@vger.kernel.org, mchehab+samsung@kernel.org, mingo@redhat.com, nicolas.ferre@microchip.com, sashal@kernel.org, sthemmin@microsoft.com, tglx@linutronix.de, x86@kernel.org, michael.h.kelley@microsoft.com, vkuznets@redhat.com, alex.williamson@redhat.com Subject: [PATCH 0/3] x86/Hyper-V/IOMMU: Add Hyper-V IOMMU driver to support x2apic mode Date: Thu, 31 Jan 2019 18:17:30 +0800 Message-Id: <1548929853-25877-1-git-send-email-Tianyu.Lan@microsoft.com> X-Mailer: git-send-email 2.7.4 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 On the bare metal, enabling X2APIC mode requires interrupt remapping function which helps to deliver irq to cpu with 32-bit APIC ID. Hyper-V doesn't provide interrupt remapping function so far and Hyper-V MSI protocol already supports to deliver interrupt to the CPU whose virtual processor index is more than 255. IO-APIC interrupt still has 8-bit APIC ID limitation. This patchset is to add Hyper-V stub IOMMU driver in order to enable X2APIC mode successfully in Hyper-V Linux guest. The driver returns X2APIC interrupt remapping capability when X2APIC mode is available. X2APIC destination mode is set to physical by PATCH 1 when X2APIC is available. Hyper-V IOMMU driver will scan cpu 0~255 and set cpu into IO-APIC MAX cpu affinity cpumask if its APIC ID is 8-bit. Driver creates a Hyper-V irq domain to limit IO-APIC interrupts' affinity and make sure cpus assigned with IO-APIC interrupt are in the scope of IO-APIC MAX cpu affinity. Lan Tianyu (3): x86/Hyper-V: Set x2apic destination mode to physical when x2apic is available HYPERV/IOMMU: Add Hyper-V stub IOMMU driver MAINTAINERS: Add Hyper-V IOMMU driver into Hyper-V CORE AND DRIVERS scope MAINTAINERS | 1 + arch/x86/kernel/cpu/mshyperv.c | 14 +++ drivers/iommu/Kconfig | 7 ++ drivers/iommu/Makefile | 1 + drivers/iommu/hyperv-iommu.c | 189 +++++++++++++++++++++++++++++++++++++++++ drivers/iommu/irq_remapping.c | 3 + drivers/iommu/irq_remapping.h | 1 + 7 files changed, 216 insertions(+) create mode 100644 drivers/iommu/hyperv-iommu.c -- 2.7.4