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 1D64FC282D7 for ; Sat, 2 Feb 2019 13:15:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DB0152173B for ; Sat, 2 Feb 2019 13:15:02 +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="p46WqfO2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727974AbfBBNPB (ORCPT ); Sat, 2 Feb 2019 08:15:01 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:43803 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727847AbfBBNPB (ORCPT ); Sat, 2 Feb 2019 08:15:01 -0500 Received: by mail-pf1-f196.google.com with SMTP id w73so4655631pfk.10 for ; Sat, 02 Feb 2019 05:15:00 -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; bh=DtMA/MfhKJlOvXTe+Q3HwtDmCBZ+wASObT1nMUJKG50=; b=p46WqfO26194jNP31Ebve0+gEYmwvY9mYKttjG3PCeG9sX1JU7M/Yax8DWBSr0KgfV vSV2BDaTzJGJy9djL8dt/G0gbZBGSh8EpRa2nRuB9YjCzXd+jVm91MHnxbLDG26VP/17 5gryZk/r6XA0IF31UxcD4ksKKK1t+76Sk238ufYHWekzE2Enxc7tvxh8fdcOrPDVzp7J ms8aYRHtvo361X1v3cJvsMR3chjLntv2GtdgFLjK7hHa+eauLmvkwcxJl4jej3jZ7WK0 KbmRMejwUH1RGY8rwdpjjIvFDnWT+fKzj31elJ0irwiE8yIJOx2p+jYO3DWP3igM42ci krhA== 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=DtMA/MfhKJlOvXTe+Q3HwtDmCBZ+wASObT1nMUJKG50=; b=WNByIgeFsL/sHUhY2dWEJEBnbXWCPmfEn2pWZilS6hkgNYN22ig0TsFG3VmQvRN6MJ NusShCIbKOSgNrNIL2/AX0zGesCb+drQeRdUbm8P/da6y+CnML/IQcORCKC1ShQ7xI0/ y1utcp6YiE+nDrRhNUfRMrBrufFSJgbUh3i0iJSRL1Cm9jxvRpZf22cKhnrPSkZY+Kji u828zcsi88cytDcSWj+bsAUz8/zdNsQKPJzE9nwgCz+AJ8YOolJzY7SpukYjK3SDA3WS 51F5i9SbcEu8BCmQvYLqmbElbwO9b8DSpUR4P0nnbo3SqG+pXV7PecB2gVs5uEpkIuXs 1UEA== X-Gm-Message-State: AJcUukclHikm30Qr3mI4DTk2K9DvY32nIvWAivnlfMOomU5UfDvQTEW7 R3D84LNsrheAL1vjlIcMOck= X-Google-Smtp-Source: ALg8bN7mfibZSRhaie2+jqwDhaxt/uLAiyvt7/sFI5iQ5H5ErqsvkJL+M8tQZnt/e+IGCYovjseZWQ== X-Received: by 2002:a63:2905:: with SMTP id p5mr39922123pgp.178.1549113300117; Sat, 02 Feb 2019 05:15:00 -0800 (PST) Received: from tianyukernel.corp.microsoft.com ([167.220.255.93]) by smtp.googlemail.com with ESMTPSA id g28sm15148045pfd.100.2019.02.02.05.14.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 02 Feb 2019 05:14:59 -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, dan.carpenter@oracle.com Subject: [PATCH V2 0/3] x86/Hyper-V/IOMMU: Add Hyper-V IOMMU driver to support x2apic mode Date: Sat, 2 Feb 2019 21:14:44 +0800 Message-Id: <1549113287-5606-1-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 | 10 +++ drivers/iommu/Kconfig | 8 ++ drivers/iommu/Makefile | 1 + drivers/iommu/hyperv-iommu.c | 193 +++++++++++++++++++++++++++++++++++++++++ drivers/iommu/irq_remapping.c | 3 + drivers/iommu/irq_remapping.h | 1 + 7 files changed, 217 insertions(+) create mode 100644 drivers/iommu/hyperv-iommu.c -- 2.7.4