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=-3.0 required=3.0 tests=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 28B0AC43441 for ; Thu, 22 Nov 2018 02:52:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E90DE2075B for ; Thu, 22 Nov 2018 02:52:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E90DE2075B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxonhyperv.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391731AbeKVN3R (ORCPT ); Thu, 22 Nov 2018 08:29:17 -0500 Received: from a2nlsmtp01-05.prod.iad2.secureserver.net ([198.71.225.49]:47536 "EHLO a2nlsmtp01-05.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731067AbeKVN3R (ORCPT ); Thu, 22 Nov 2018 08:29:17 -0500 Received: from linuxonhyperv2.linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with ESMTP id Pf51gqkpNse9VPf51gykHp; Wed, 21 Nov 2018 19:51:00 -0700 x-originating-ip: 107.180.71.197 Received: from kys by linuxonhyperv2.linuxonhyperv.com with local (Exim 4.91) (envelope-from ) id 1gPf51-00048v-Pr; Wed, 21 Nov 2018 19:50:59 -0700 From: kys@linuxonhyperv.com To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com, sthemmin@microsoft.com, Michael.H.Kelley@microsoft.com, vkuznets@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 0/4] Hyper-V: Enable Linux guests on Hyper-V on ARM64 Date: Thu, 22 Nov 2018 02:50:51 +0000 Message-Id: <20181122025051.15886-1-kys@linuxonhyperv.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Reply-To: kys@microsoft.com Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4wfMrqRm8wAJzbO5vcN76QRKxvs0DsCTqAAOZeKJUc+2Be2noxeStliqE+4ri6UIRPNihKfAbwKp974LGqdzjR7Kr33eES1FQOGCPuZnrOS42EAHI7UrF6 W6gB3P9+nE6ejXAorkuEhpnudmLVQGQl4hdknV0xWjlrOp8d8jYckGrchYrIMD5d0bEldDoxwZaHT68cuZJdtLOqc7WdRJJDwDXgyLS7LSps5qm2whRLd77J TjAuM5rieBOh6OnNPWQX1vum9PyNVbKF4cTvbuyf7Mw7CkJLaLpBZMPDx4OJN5zCioYlzIu+g/vTxKicFU85/5ptzA1PR8LxWXW65olZOKhqqam6I76t6wLG x5bdQMTNLA+PcmCNG0FbdHACwEGDjykJeOCjvqS/qBqJs3qCMqsYF4PHG8vFp2eeyMz+YaD6TNDqwYOnEK8nFXTRox3jBiWpHLATU9oc4PjZoZWkgwhgtU/j 7qwBWjcxBPsZ7E3WdppuRIWUCcvNFQ5p+wR0IDJambl/78F59cxXmK7yaXBGdW/jBQTf/Jhog/xbM77x Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "K. Y. Srinivasan" This series enables Linux guests running on Hyper-V on ARM64 hardware. New ARM64-specific code in arch/arm64/hyperv initializes Hyper-V, including its synthetic clocks and hypercall mechanism. Existing architecture independent drivers for Hyper-V's VMbus and synthetic devices just work when built for ARM64. Hyper-V code is built and included in the image and modules only if CONFIG_HYPERV is enabled. The four patches are organized as follows: 1) Add include files that define the Hyper-V interface as described in the Hyper-V Top Level Functional Spec (TLFS), plus additional definitions specific to Linux running on Hyper-V. 2) Add core Hyper-V support on ARM64, including hypercalls, synthetic clock initialization, and interrupt handlers. 3) Update the existing VMbus driver to generalize interrupt management across x86/x64 and ARM64. 4) Make CONFIG_HYPERV selectable on ARM64 in addition to x86/x64. Some areas of Linux guests on Hyper-V on ARM64 are a work- in-progress, primarily due to work still being done in Hyper-V: * Hyper-V on ARM64 currently runs with a 4 Kbyte page size, and only supports guests with a 4 Kbyte page size. Because Hyper-V uses shared pages to communicate between the guest and the hypervisor, there are open design decisions on the page size to use when the guest is using 16K/64K pages. Once those issues are resolved and Hyper-V fully supports 16K/64K guest pages, changes may be needed in the Linux drivers for Hyper-V synthetic devices. * Hyper-V on ARM64 does not currently support mapping PCI devices into the guest address space. The Hyper-V PCI driver at drivers/pci/host/pci-hyperv.c has x86/x64-specific code and is not being built for ARM64. In a few cases, terminology from the x86/x64 world has been carried over into the ARM64 code ("MSR", "TSC"). Hyper-V still uses the x86/x64 terminology and has not replaced it with something more generic, so the code uses the Hyper-V terminology. This will be fixed when Hyper-V updates the usage in the TLFS. Michael Kelley (4): arm64: hyperv: Add core Hyper-V include files arm64: hyperv: Add support for Hyper-V as a hypervisor Drivers: hv: vmbus: Add hooks for per-CPU IRQ Drivers: hv: Enable CONFIG_HYPERV on ARM64 MAINTAINERS | 4 + arch/arm64/Makefile | 1 + arch/arm64/hyperv/Makefile | 2 + arch/arm64/hyperv/hv_hvc.S | 54 ++++ arch/arm64/hyperv/hv_init.c | 441 +++++++++++++++++++++++++++ arch/arm64/hyperv/mshyperv.c | 178 +++++++++++ arch/arm64/include/asm/hyperv-tlfs.h | 338 ++++++++++++++++++++ arch/arm64/include/asm/mshyperv.h | 116 +++++++ arch/x86/include/asm/mshyperv.h | 4 + drivers/hv/Kconfig | 3 +- drivers/hv/hv.c | 2 + include/asm-generic/mshyperv.h | 240 +++++++++++++++ 12 files changed, 1382 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/hyperv/Makefile create mode 100644 arch/arm64/hyperv/hv_hvc.S create mode 100644 arch/arm64/hyperv/hv_init.c create mode 100644 arch/arm64/hyperv/mshyperv.c create mode 100644 arch/arm64/include/asm/hyperv-tlfs.h create mode 100644 arch/arm64/include/asm/mshyperv.h create mode 100644 include/asm-generic/mshyperv.h -- 2.19.1