From patchwork Sat Nov 3 00:15:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael Kelley (LINUX)" X-Patchwork-Id: 10666385 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC8AD13BF for ; Sat, 3 Nov 2018 00:15:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A9EA32B88D for ; Sat, 3 Nov 2018 00:15:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E0712B8ED; Sat, 3 Nov 2018 00:15:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 2D7642B88D for ; Sat, 3 Nov 2018 00:15:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To:References: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=8xJM9qvmgX/PDBSBzmLYVfstpHgtoU6TzZObiJEre4c=; b=NlwTvUwE2FtPlJ GePjE46rl/PDX1xhJIsuI+Urb5xY8fyzLo17r17ykH7e6oMmmD4jrvlDg23HeATIYsvlIXgCHoJHr PPx68vDLOmIzojEXTxhWH67K3pi6WMhmPJ7r6NuyJwkKlujZgiwe471zf0r6DCF3UrrU2sqNO/BJR DPbbQlc5+X64aKrs1teYTo8ftge2lqaMKuf/H66ogBpnDS11d53CHjNpLWv3KWzu7pDYFolquO+NO XbaDaS7zJKHyz8ROwTP/j8QmROXTwa+o+AfZfzT7qCRcoChlfJc9Uh8l6RFWwDBWX1E2eLRxnJTKk apsgDfhxwbITmLJ/rUrg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gIjb5-000399-Ep; Sat, 03 Nov 2018 00:15:27 +0000 Received: from mail-eopbgr730091.outbound.protection.outlook.com ([40.107.73.91] helo=NAM05-DM3-obe.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gIjau-0001gm-17 for linux-arm-kernel@lists.infradead.org; Sat, 03 Nov 2018 00:15:18 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=pYlEViU4ZmuSQJX83yUdlhsoBAxIgRoqhbAipkDZ+7E=; b=Qir5tYTwinXuiy7jLECgHWwIyBQVr66wgVM0dm7ZdVuACeSCkH/NApycsn+ljYAaYKRYzxE54v+AfSZBxX8C3WWRSrAcVLSa+P0cedf0nTrPNM6hw/QmkvvgeHvlMHga3PyDtybowf+LpdPXrCeEVvArlE0oIY2iWK5+Inffm7k= Received: from MWHPR21MB0766.namprd21.prod.outlook.com (10.173.51.20) by MWHPR21MB0286.namprd21.prod.outlook.com (10.173.53.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.1294.2; Sat, 3 Nov 2018 00:15:10 +0000 Received: from MWHPR21MB0766.namprd21.prod.outlook.com ([fe80::1982:5e59:2489:88e6]) by MWHPR21MB0766.namprd21.prod.outlook.com ([fe80::1982:5e59:2489:88e6%14]) with mapi id 15.20.1339.000; Sat, 3 Nov 2018 00:15:10 +0000 From: Michael Kelley To: "will.deacon@arm.com" , "catalin.marinas@arm.com" , "mark.rutland@arm.com" , "marc.zyngier@arm.com" , "linux-arm-kernel@lists.infradead.org" , "gregkh@linuxfoundation.org" , "linux-kernel@vger.kernel.org" , "devel@linuxdriverproject.org" , "olaf@aepfle.de" , "apw@canonical.com" , vkuznets , "jasowang@redhat.com" , "marcelo.cerri@canonical.com" , Sunil Muthuswamy , KY Srinivasan Subject: [PATCH v3 1/4] arm64: hyperv: Add core Hyper-V include files Thread-Topic: [PATCH v3 1/4] arm64: hyperv: Add core Hyper-V include files Thread-Index: AQHUcwpIguMAB/xr0kKwJZiEE7aaNw== Date: Sat, 3 Nov 2018 00:15:10 +0000 Message-ID: <1541204037-18043-2-git-send-email-mikelley@microsoft.com> References: <1541204037-18043-1-git-send-email-mikelley@microsoft.com> In-Reply-To: <1541204037-18043-1-git-send-email-mikelley@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: MWHPR2201CA0011.namprd22.prod.outlook.com (2603:10b6:301:28::24) To MWHPR21MB0766.namprd21.prod.outlook.com (2603:10b6:300:76::20) x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [131.107.174.136] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; MWHPR21MB0286; 6:yjfmk7QXStz9XYeFCEfv9iLdhVaNoO/64PW8IBUTu/7TA7izBrs2ddug67KD4egPhuQFpx0/NHXdNOyN6QP/Wl2wBgbWI5YBLZGqnRpLGmJChItzgJIaihmj+AXSFb1bCOEBNlyFVVAARElBtv4nXHejqkFW7nq3y4UbWmegYkc5NsHRVt8hr4DVqhtwIPkY5C0NN5jlaWWgZImsG45zXsFFvsiFCitNYwdYKWXjyk6LoJrJ4XLA/YOTtbRTE8Z2ZdKWYEYPOdAx3jt79/213XdktRVWc3ywmZX86vBLamHXrp/MkvEy2mz+lDmWFPMs7EaO6h7zpnLAqvOjZnvgs7GPODxIt5/lewXmm/wSg5YRtvUvbqZvtTrDtZwPthHHwyFLtGmiDWakg2t+mcfZN1hs0V+zVDhnyNyRwqtfbKzVE04gUR4zX7eEri8kj++ysQfgxa708K9GVsHAPtSI/w==; 5:GjGD4+x/JkW2+2fcdhixuEZky+fXIDp8pHxf4aEKFFNCzWm6f1q9El6vGoKQwnPFXaU2sdpWBT5XFYOC1GhkPoEH6AnchbbzujYpy7C8ap16ZchHGa7kq5YpULG3dXNoX5dLtrm9rjqbLCDDQCvtekM7zkE8bNlZkT7Tgfn/az8=; 7:xLUN3dZ137JEBwrUdpSfRrZduARnh7UQ5wLNI+KaIh9PC5HqrUf0KCExTLRQc6J+TJtwlh6LQf5vwGYAn2nHcaYpGYXimed2g5AGGSDq52CFONl2NVhAAQe2xy/WJLLqtIbjiQvOloTcyIlsg+eRGw== x-ms-office365-filtering-correlation-id: c831a45f-d63e-4a4b-0839-08d641216aa8 x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: BCL:0; PCL:0; RULEID:(7020095)(4652040)(8989299)(5600074)(711020)(4618075)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(2017052603328)(7193020); SRVR:MWHPR21MB0286; x-ms-traffictypediagnostic: MWHPR21MB0286: authentication-results: spf=none (sender IP is ) smtp.mailfrom=mikelley@microsoft.com; x-ld-processed: 72f988bf-86f1-41af-91ab-2d7cd011db47,ExtAddr x-o365eop-header: O365_EOP: Allow for Unauthenticated Relay x-o365ent-eop-header: Message processed by - O365_ENT: Allow from ranges (Engineering ONLY) x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(176295241369792)(89211679590171); x-ms-exchange-senderadcheck: 1 x-exchange-antispam-report-cfa-test: BCL:0; PCL:0; RULEID:(8211001083)(6040522)(8220035)(2401047)(8121501046)(5005006)(10201501046)(3231382)(944501410)(52105095)(2018427008)(3002001)(93006095)(93001095)(6055026)(148016)(149066)(150057)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123560045)(20161123562045)(20161123564045)(20161123558120)(201708071742011)(7699051)(76991095); SRVR:MWHPR21MB0286; BCL:0; PCL:0; RULEID:; SRVR:MWHPR21MB0286; x-forefront-prvs: 08457955C4 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(346002)(376002)(396003)(136003)(366004)(39860400002)(189003)(199004)(6506007)(316002)(386003)(2501003)(7736002)(81156014)(81166006)(2201001)(22452003)(2900100001)(99286004)(66066001)(8936002)(53936002)(53946003)(476003)(3846002)(14454004)(110136005)(10090500001)(36756003)(76176011)(5660300001)(6636002)(575784001)(1511001)(86362001)(305945005)(8676002)(52116002)(86612001)(11346002)(6116002)(4326008)(14444005)(7416002)(256004)(97736004)(102836004)(486006)(10290500003)(71200400001)(71190400001)(4744004)(6306002)(6512007)(6486002)(25786009)(186003)(105586002)(26005)(2616005)(107886003)(68736007)(446003)(478600001)(106356001)(966005)(2906002)(6436002)(2004002)(921003)(1121003)(579004); DIR:OUT; SFP:1102; SCL:1; SRVR:MWHPR21MB0286; H:MWHPR21MB0766.namprd21.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: microsoft.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: lZkh+HypaxS70wmY8qMQhLBCKtMnkx9jTYwZGf2EHO1ppxMUz1tq3o/47G2htiTgHiejysZsjmK07uM/zsuYBti+wNA9fvONyulmYneKeeSP7Vcq7NtZv4TOS8PQFXBfRN9//BpJP4MVczcaYBNyJoT5zeafEaPqnO/ftEDm11sZ3KIAaZut7d+RtCyzmfNzPFwlP6yaVVzfTcL/6ABn2baU9VfUaKV8Kmwqjy7JyU6p03i26okCZXu8UIKTjy3o4QJ62245xGdfUydq9QXvAj0Z6CPI8KJGTkneC+Z1/XtUIBxq/Z0WZ1Qt6i//BvoLiKbcJqHD1/DtbaQH/glyH/DLE9NyRicoJH1npBNZlKg= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: c831a45f-d63e-4a4b-0839-08d641216aa8 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Nov 2018 00:15:10.0658 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR21MB0286 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181102_171516_120440_43E9D1EF X-CRM114-Status: GOOD ( 20.71 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michael Kelley Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP hyperv-tlfs.h defines Hyper-V interfaces from the Hyper-V Top Level Functional Spec (TLFS). The TLFS is distinctly oriented to x86/x64, and Hyper-V has not separated out the architecture-dependent parts into x86/x64 vs. ARM64. So hyperv-tlfs.h includes information for ARM64 that is not yet formally published. The TLFS is available here: docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs mshyperv.h defines Linux-specific structures and routines for interacting with Hyper-V. It is split into an ARM64 specific file and an architecture independent file in include/asm-generic. Signed-off-by: Michael Kelley --- MAINTAINERS | 3 + arch/arm64/include/asm/hyperv-tlfs.h | 338 +++++++++++++++++++++++++++++++++++ arch/arm64/include/asm/mshyperv.h | 116 ++++++++++++ include/asm-generic/mshyperv.h | 240 +++++++++++++++++++++++++ 4 files changed, 697 insertions(+) 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 diff --git a/MAINTAINERS b/MAINTAINERS index 25c090e..00c7bad 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -6798,6 +6798,8 @@ F: arch/x86/include/asm/trace/hyperv.h F: arch/x86/include/asm/hyperv-tlfs.h F: arch/x86/kernel/cpu/mshyperv.c F: arch/x86/hyperv +F: arch/arm64/include/asm/hyperv-tlfs.h +F: arch/arm64/include/asm/mshyperv.h F: drivers/hid/hid-hyperv.c F: drivers/hv/ F: drivers/input/serio/hyperv-keyboard.c @@ -6809,6 +6811,7 @@ F: drivers/video/fbdev/hyperv_fb.c F: net/vmw_vsock/hyperv_transport.c F: include/linux/hyperv.h F: include/uapi/linux/hyperv.h +F: include/asm-generic/mshyperv.h F: tools/hv/ F: Documentation/ABI/stable/sysfs-bus-vmbus diff --git a/arch/arm64/include/asm/hyperv-tlfs.h b/arch/arm64/include/asm/hyperv-tlfs.h new file mode 100644 index 0000000..1430798 --- /dev/null +++ b/arch/arm64/include/asm/hyperv-tlfs.h @@ -0,0 +1,338 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * This file contains definitions from the Hyper-V Hypervisor Top-Level + * Functional Specification (TLFS): + * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs + * + * Copyright (C) 2018, Microsoft, Inc. + * + * Author : Michael Kelley + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#ifndef _ASM_ARM64_HYPERV_H +#define _ASM_ARM64_HYPERV_H + +#include + +/* + * These Hyper-V registers provide information equivalent to the CPUID + * instruction on x86/x64. + */ +#define HV_REGISTER_HYPERVISOR_VERSION 0x00000100 /*CPUID 0x40000002 */ +#define HV_REGISTER_PRIVILEGES_AND_FEATURES 0x00000200 /*CPUID 0x40000003 */ +#define HV_REGISTER_FEATURES 0x00000201 /*CPUID 0x40000004 */ +#define HV_REGISTER_IMPLEMENTATION_LIMITS 0x00000202 /*CPUID 0x40000005 */ +#define HV_ARM64_REGISTER_INTERFACE_VERSION 0x00090006 /*CPUID 0x40000001 */ + +/* + * Feature identification. HvRegisterPrivilegesAndFeaturesInfo returns a + * 128-bit value with flags indicating which features are available to the + * partition based upon the current partition privileges. The 128-bit + * value is broken up with different portions stored in different 32-bit + * fields in the ms_hyperv structure. + */ + +/* Partition Reference Counter available*/ +#define HV_MSR_TIME_REF_COUNT_AVAILABLE (1 << 1) + +/* + * Synthetic Timers available + */ +#define HV_MSR_SYNTIMER_AVAILABLE (1 << 3) + +/* Frequency MSRs available */ +#define HV_FEATURE_FREQUENCY_MSRS_AVAILABLE (1 << 8) + +/* Reference TSC available */ +#define HV_MSR_REFERENCE_TSC_AVAILABLE (1 << 9) + +/* Crash MSR available */ +#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE (1 << 10) + + +/* + * This group of flags is in the high order 64-bits of the returned + * 128-bit value. + */ + +/* STIMER direct mode is available */ +#define HV_STIMER_DIRECT_MODE_AVAILABLE (1 << 19) + +/* + * Implementation recommendations in register + * HvRegisterFeaturesInfo. Indicates which behaviors the hypervisor + * recommends the OS implement for optimal performance. + */ + +/* + * Recommend not using Auto EOI + */ +#define HV_DEPRECATING_AEOI_RECOMMENDED (1 << 9) + +/* + * Synthetic register definitions equivalent to MSRs on x86/x64 + */ +#define HV_REGISTER_CRASH_P0 0x00000210 +#define HV_REGISTER_CRASH_P1 0x00000211 +#define HV_REGISTER_CRASH_P2 0x00000212 +#define HV_REGISTER_CRASH_P3 0x00000213 +#define HV_REGISTER_CRASH_P4 0x00000214 +#define HV_REGISTER_CRASH_CTL 0x00000215 + +#define HV_REGISTER_GUEST_OSID 0x00090002 +#define HV_REGISTER_VPINDEX 0x00090003 +#define HV_REGISTER_TIME_REFCOUNT 0x00090004 +#define HV_REGISTER_REFERENCE_TSC 0x00090017 + +#define HV_REGISTER_SINT0 0x000A0000 +#define HV_REGISTER_SINT1 0x000A0001 +#define HV_REGISTER_SINT2 0x000A0002 +#define HV_REGISTER_SINT3 0x000A0003 +#define HV_REGISTER_SINT4 0x000A0004 +#define HV_REGISTER_SINT5 0x000A0005 +#define HV_REGISTER_SINT6 0x000A0006 +#define HV_REGISTER_SINT7 0x000A0007 +#define HV_REGISTER_SINT8 0x000A0008 +#define HV_REGISTER_SINT9 0x000A0009 +#define HV_REGISTER_SINT10 0x000A000A +#define HV_REGISTER_SINT11 0x000A000B +#define HV_REGISTER_SINT12 0x000A000C +#define HV_REGISTER_SINT13 0x000A000D +#define HV_REGISTER_SINT14 0x000A000E +#define HV_REGISTER_SINT15 0x000A000F +#define HV_REGISTER_SCONTROL 0x000A0010 +#define HV_REGISTER_SVERSION 0x000A0011 +#define HV_REGISTER_SIFP 0x000A0012 +#define HV_REGISTER_SIPP 0x000A0013 +#define HV_REGISTER_EOM 0x000A0014 +#define HV_REGISTER_SIRBP 0x000A0015 + +#define HV_REGISTER_STIMER0_CONFIG 0x000B0000 +#define HV_REGISTER_STIMER0_COUNT 0x000B0001 +#define HV_REGISTER_STIMER1_CONFIG 0x000B0002 +#define HV_REGISTER_STIMER1_COUNT 0x000B0003 +#define HV_REGISTER_STIMER2_CONFIG 0x000B0004 +#define HV_REGISTER_STIMER2_COUNT 0x000B0005 +#define HV_REGISTER_STIMER3_CONFIG 0x000B0006 +#define HV_REGISTER_STIMER3_COUNT 0x000B0007 + +/* + * Crash notification flags. + */ +#define HV_CRASH_CTL_CRASH_NOTIFY_MSG BIT_ULL(62) +#define HV_CRASH_CTL_CRASH_NOTIFY BIT_ULL(63) + +/* + * The guest OS needs to register the guest ID with the hypervisor. + * The guest ID is a 64 bit entity and the structure of this ID is + * specified in the Hyper-V specification: + * + * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx + * + * While the current guideline does not specify how Linux guest ID(s) + * need to be generated, our plan is to publish the guidelines for + * Linux and other guest operating systems that currently are hosted + * on Hyper-V. The implementation here conforms to this yet + * unpublished guidelines. + * + * + * Bit(s) + * 63 - Indicates if the OS is Open Source or not; 1 is Open Source + * 62:56 - Os Type; Linux is 0x100 + * 55:48 - Distro specific identification + * 47:16 - Linux kernel version number + * 15:0 - Distro specific identification + * + * + */ +#define HV_LINUX_VENDOR_ID 0x8100 + +/* Declare the various hypercall operations. */ +#define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE 0x0002 +#define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST 0x0003 +#define HVCALL_NOTIFY_LONG_SPIN_WAIT 0x0008 +#define HVCALL_SEND_IPI 0x000b +#define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX 0x0013 +#define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX 0x0014 +#define HVCALL_SEND_IPI_EX 0x0015 +#define HVCALL_GET_VP_REGISTERS 0x0050 +#define HVCALL_SET_VP_REGISTERS 0x0051 +#define HVCALL_POST_MESSAGE 0x005c +#define HVCALL_SIGNAL_EVENT 0x005d +#define HVCALL_RETARGET_INTERRUPT 0x007e +#define HVCALL_START_VIRTUAL_PROCESSOR 0x0099 +#define HVCALL_GET_VP_INDEX_FROM_APICID 0x009a + +/* Declare standard hypercall field values. */ +#define HV_PARTITION_ID_SELF ((u64)-1) +#define HV_VP_INDEX_SELF ((u32)-2) + +#define HV_HYPERCALL_FAST_BIT BIT(16) +#define HV_HYPERCALL_REP_COUNT_1 BIT_ULL(32) +#define HV_HYPERCALL_RESULT_MASK GENMASK_ULL(15, 0) + +/* Define the hypercall status result */ + +union hv_hypercall_status { + u64 as_uint64; + struct { + u16 status; + u16 reserved; + u16 reps_completed; /* Low 12 bits */ + u16 reserved2; + }; +}; + +/* hypercall status code */ +#define HV_STATUS_SUCCESS 0 +#define HV_STATUS_INVALID_HYPERCALL_CODE 2 +#define HV_STATUS_INVALID_HYPERCALL_INPUT 3 +#define HV_STATUS_INVALID_ALIGNMENT 4 +#define HV_STATUS_INSUFFICIENT_MEMORY 11 +#define HV_STATUS_INVALID_CONNECTION_ID 18 +#define HV_STATUS_INSUFFICIENT_BUFFERS 19 + +/* Define output layout for Get VP Register hypercall */ +struct hv_get_vp_register_output { + u64 registervaluelow; + u64 registervaluehigh; +}; + +#define HV_FLUSH_ALL_PROCESSORS BIT(0) +#define HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES BIT(1) +#define HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY BIT(2) +#define HV_FLUSH_USE_EXTENDED_RANGE_FORMAT BIT(3) + +enum HV_GENERIC_SET_FORMAT { + HV_GENERIC_SET_SPARSE_4K, + HV_GENERIC_SET_ALL, +}; + +/* + * The Hyper-V TimeRefCount register and the TSC + * page provide a guest VM clock with 100ns tick rate + */ +#define HV_CLOCK_HZ (NSEC_PER_SEC/100) + +/* + * The fields in this structure are set by Hyper-V and read + * by the Linux guest. They should be accessed with READ_ONCE() + * so the compiler doesn't optimize in a way that will cause + * problems. + */ +struct ms_hyperv_tsc_page { + u32 tsc_sequence; + u32 reserved1; + u64 tsc_scale; + s64 tsc_offset; + u64 reserved2[509]; +}; + +/* Define the number of synthetic interrupt sources. */ +#define HV_SYNIC_SINT_COUNT (16) +/* Define the expected SynIC version. */ +#define HV_SYNIC_VERSION_1 (0x1) + +#define HV_SYNIC_CONTROL_ENABLE (1ULL << 0) +#define HV_SYNIC_SIMP_ENABLE (1ULL << 0) +#define HV_SYNIC_SIEFP_ENABLE (1ULL << 0) +#define HV_SYNIC_SINT_MASKED (1ULL << 16) +#define HV_SYNIC_SINT_AUTO_EOI (1ULL << 17) +#define HV_SYNIC_SINT_VECTOR_MASK (0xFF) + +#define HV_SYNIC_STIMER_COUNT (4) + +/* Define synthetic interrupt controller message constants. */ +#define HV_MESSAGE_SIZE (256) +#define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240) +#define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30) + +/* Define hypervisor message types. */ +enum hv_message_type { + HVMSG_NONE = 0x00000000, + + /* Memory access messages. */ + HVMSG_UNMAPPED_GPA = 0x80000000, + HVMSG_GPA_INTERCEPT = 0x80000001, + + /* Timer notification messages. */ + HVMSG_TIMER_EXPIRED = 0x80000010, + + /* Error messages. */ + HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020, + HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021, + HVMSG_UNSUPPORTED_FEATURE = 0x80000022, + + /* Trace buffer complete messages. */ + HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040, +}; + +/* Define synthetic interrupt controller message flags. */ +union hv_message_flags { + __u8 asu8; + struct { + __u8 msg_pending:1; + __u8 reserved:7; + }; +}; + +/* Define port identifier type. */ +union hv_port_id { + __u32 asu32; + struct { + __u32 id:24; + __u32 reserved:8; + } u; +}; + +/* Define synthetic interrupt controller message header. */ +struct hv_message_header { + __u32 message_type; + __u8 payload_size; + union hv_message_flags message_flags; + __u8 reserved[2]; + union { + __u64 sender; + union hv_port_id port; + }; +}; + +/* Define synthetic interrupt controller message format. */ +struct hv_message { + struct hv_message_header header; + union { + __u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; + } u; +}; + +/* Define the synthetic interrupt message page layout. */ +struct hv_message_page { + struct hv_message sint_message[HV_SYNIC_SINT_COUNT]; +}; + +/* Define timer message payload structure. */ +struct hv_timer_message_payload { + __u32 timer_index; + __u32 reserved; + __u64 expiration_time; /* When the timer expired */ + __u64 delivery_time; /* When the message was delivered */ +}; + +#define HV_STIMER_ENABLE (1ULL << 0) +#define HV_STIMER_PERIODIC (1ULL << 1) +#define HV_STIMER_LAZY (1ULL << 2) +#define HV_STIMER_AUTOENABLE (1ULL << 3) +#define HV_STIMER_SINT(config) (__u8)(((config) >> 16) & 0x0F) + +#endif diff --git a/arch/arm64/include/asm/mshyperv.h b/arch/arm64/include/asm/mshyperv.h new file mode 100644 index 0000000..a87c431 --- /dev/null +++ b/arch/arm64/include/asm/mshyperv.h @@ -0,0 +1,116 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * Linux-specific definitions for managing interactions with Microsoft's + * Hyper-V hypervisor. The definitions in this file are specific to + * the ARM64 architecture. See include/asm-generic/mshyperv.h for + * definitions are that architecture independent. + * + * Definitions that are specified in the Hyper-V Top Level Functional + * Spec (TLFS) should not go in this file, but should instead go in + * hyperv-tlfs.h. + * + * Copyright (C) 2018, Microsoft, Inc. + * + * Author : Michael Kelley + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#ifndef _ASM_ARM64_MSHYPERV_H +#define _ASM_ARM64_MSHYPERV_H + +#include +#include +#include +#include +#include +#include + +/* + * Define the IRQ numbers/vectors used by Hyper-V VMbus interrupts + * and by STIMER0 Direct Mode interrupts. Hyper-V should be supplying + * these values through ACPI, but there are no other interrupting + * devices in a Hyper-V VM on ARM64, so it's OK to hard code for now. + * The "CALLBACK_VECTOR" terminology is a left-over from the x86/x64 + * world that is used in architecture independent Hyper-V code. + */ +#define HYPERVISOR_CALLBACK_VECTOR 16 +#define HV_STIMER0_IRQNR 17 + +extern u64 hv_do_hvc(u64 control, ...); +extern u64 hv_do_hvc_fast_get(u64 control, u64 input1, u64 input2, u64 input3, + struct hv_get_vp_register_output *output); + +/* + * Declare calls to get and set Hyper-V VP register values on ARM64, which + * requires a hypercall. + */ +extern void hv_set_vpreg(u32 reg, u64 value); +extern u64 hv_get_vpreg(u32 reg); +extern void hv_get_vpreg_128(u32 reg, struct hv_get_vp_register_output *result); + +/* + * Use the Hyper-V provided stimer0 as the timer that is made + * available to the architecture independent Hyper-V drivers. + */ +#define hv_init_timer(timer, tick) \ + hv_set_vpreg(HV_REGISTER_STIMER0_COUNT + (2*timer), tick) +#define hv_init_timer_config(timer, val) \ + hv_set_vpreg(HV_REGISTER_STIMER0_CONFIG + (2*timer), val) +#define hv_get_current_tick(tick) \ + (tick = hv_get_vpreg(HV_REGISTER_TIME_REFCOUNT)) + +#define hv_get_simp(val) (val = hv_get_vpreg(HV_REGISTER_SIPP)) +#define hv_set_simp(val) hv_set_vpreg(HV_REGISTER_SIPP, val) + +#define hv_get_siefp(val) (val = hv_get_vpreg(HV_REGISTER_SIFP)) +#define hv_set_siefp(val) hv_set_vpreg(HV_REGISTER_SIFP, val) + +#define hv_get_synic_state(val) (val = hv_get_vpreg(HV_REGISTER_SCONTROL)) +#define hv_set_synic_state(val) hv_set_vpreg(HV_REGISTER_SCONTROL, val) + +#define hv_get_vp_index(index) (index = hv_get_vpreg(HV_REGISTER_VPINDEX)) + +#define hv_signal_eom() hv_set_vpreg(HV_REGISTER_EOM, 0) + +/* + * Hyper-V SINT registers are numbered sequentially, so we can just + * add the SINT number to the register number of SINT0 + */ +#define hv_get_synint_state(sint_num, val) \ + (val = hv_get_vpreg(HV_REGISTER_SINT0 + sint_num)) +#define hv_set_synint_state(sint_num, val) \ + hv_set_vpreg(HV_REGISTER_SINT0 + sint_num, val) + +#define hv_get_crash_ctl(val) \ + (val = hv_get_vpreg(HV_REGISTER_CRASH_CTL)) + +#if IS_ENABLED(CONFIG_HYPERV) +#define hv_enable_stimer0_percpu_irq(irq) enable_percpu_irq(irq, 0) +#define hv_disable_stimer0_percpu_irq(irq) disable_percpu_irq(irq) +#endif + +/* ARM64 specific code to read the hardware clock */ +static inline u64 hv_read_hwclock(void) +{ + u64 result; + + isb(); + result = read_sysreg(cntvct_el0); + isb(); + + return result; +} + +#include + +#endif diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h new file mode 100644 index 0000000..fbe1ec8 --- /dev/null +++ b/include/asm-generic/mshyperv.h @@ -0,0 +1,240 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * Linux-specific definitions for managing interactions with Microsoft's + * Hyper-V hypervisor. The definitions in this file are architecture + * independent. See arch//include/asm/mshyperv.h for definitions + * that are specific to architecture . + * + * Definitions that are specified in the Hyper-V Top Level Functional + * Spec (TLFS) should not go in this file, but should instead go in + * hyperv-tlfs.h. + * + * Copyright (C) 2018, Microsoft, Inc. + * + * Author : Michael Kelley + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + */ + +#ifndef _ASM_GENERIC_MSHYPERV_H +#define _ASM_GENERIC_MSHYPERV_H + +#include +#include +#include +#include +#include +#include + +/* + * Hyper-V always runs with a page size of 4096. These definitions + * are used when communicating with Hyper-V using guest physical + * pages and guest physical page addresses, since the guest page + * size may not be 4096 on ARM64. + */ +#define HV_HYP_PAGE_SIZE 4096 +#define HV_HYP_PAGE_SHIFT 12 +#define HV_HYP_PAGE_MASK (~(HV_HYP_PAGE_SIZE - 1)) + + +struct ms_hyperv_info { + u32 features; + u32 misc_features; + u32 hints; + u32 max_vp_index; + u32 max_lp_index; +}; +extern struct ms_hyperv_info ms_hyperv; + +extern u64 hv_do_hypercall(u64 control, void *inputaddr, void *outputaddr); +extern u64 hv_do_fast_hypercall8(u16 control, u64 input8); + +/* + * The guest OS needs to register the guest ID with the hypervisor. + * The guest ID is a 64 bit entity and the structure of this ID is + * specified in the Hyper-V specification: + * + * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx + * + * While the current guideline does not specify how Linux guest ID(s) + * need to be generated, our plan is to publish the guidelines for + * Linux and other guest operating systems that currently are hosted + * on Hyper-V. The implementation here conforms to this yet + * unpublished guidelines. + * + * + * Bit(s) + * 63 - Indicates if the OS is Open Source or not; 1 is Open Source + * 62:56 - Os Type; Linux is 0x100 + * 55:48 - Distro specific identification + * 47:16 - Linux kernel version number + * 15:0 - Distro specific identification + * + * Generate the guest ID based on the guideline described above. + */ + +static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version, + __u64 d_info2) +{ + __u64 guest_id = 0; + + guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); + guest_id |= (d_info1 << 48); + guest_id |= (kernel_version << 16); + guest_id |= d_info2; + + return guest_id; +} + + +/* Free the message slot and signal end-of-message if required */ +static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) +{ + /* + * On crash we're reading some other CPU's message page and we need + * to be careful: this other CPU may already had cleared the header + * and the host may already had delivered some other message there. + * In case we blindly write msg->header.message_type we're going + * to lose it. We can still lose a message of the same type but + * we count on the fact that there can only be one + * CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages + * on crash. + */ + if (cmpxchg(&msg->header.message_type, old_msg_type, + HVMSG_NONE) != old_msg_type) + return; + + /* + * Make sure the write to MessageType (ie set to + * HVMSG_NONE) happens before we read the + * MessagePending and EOMing. Otherwise, the EOMing + * will not deliver any more messages since there is + * no empty slot + */ + mb(); + + if (msg->header.message_flags.msg_pending) { + /* + * This will cause message queue rescan to + * possibly deliver another msg from the + * hypervisor + */ + hv_signal_eom(); + } +} + +void hv_setup_vmbus_irq(void (*handler)(void)); +void hv_remove_vmbus_irq(void); +void hv_enable_vmbus_irq(void); +void hv_disable_vmbus_irq(void); + +void hv_setup_kexec_handler(void (*handler)(void)); +void hv_remove_kexec_handler(void); +void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)); +void hv_remove_crash_handler(void); + +#if IS_ENABLED(CONFIG_HYPERV) +extern struct clocksource *hyperv_cs; + +/* + * Hypervisor's notion of virtual processor ID is different from + * Linux' notion of CPU ID. This information can only be retrieved + * in the context of the calling CPU. Setup a map for easy access + * to this information. + */ +extern u32 *hv_vp_index; +extern u32 hv_max_vp_index; + +/* Sentinel value for an uninitialized entry in hv_vp_index array */ +#define VP_INVAL U32_MAX + +/** + * hv_cpu_number_to_vp_number() - Map CPU to VP. + * @cpu_number: CPU number in Linux terms + * + * This function returns the mapping between the Linux processor + * number and the hypervisor's virtual processor number, useful + * in making hypercalls and such that talk about specific + * processors. + * + * Return: Virtual processor number in Hyper-V terms + */ +static inline int hv_cpu_number_to_vp_number(int cpu_number) +{ + return hv_vp_index[cpu_number]; +} + +void hyperv_report_panic(struct pt_regs *regs, long err); +void hyperv_report_panic_msg(phys_addr_t pa, size_t size); +bool hv_is_hyperv_initialized(void); +void hyperv_cleanup(void); +#else /* CONFIG_HYPERV */ +static inline bool hv_is_hyperv_initialized(void) { return false; } +static inline void hyperv_cleanup(void) {} +#endif /* CONFIG_HYPERV */ + +#if IS_ENABLED(CONFIG_HYPERV) +extern int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void)); +extern void hv_remove_stimer0_irq(int irq); +#endif + +static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg, + u64 *cur_tsc) +{ + u64 scale, offset; + u32 sequence; + + /* + * The protocol for reading Hyper-V TSC page is specified in Hypervisor + * Top-Level Functional Specification. To get the reference time we + * must do the following: + * - READ ReferenceTscSequence + * A special '0' value indicates the time source is unreliable and we + * need to use something else. + * - ReferenceTime = + * ((HWclock val) * ReferenceTscScale) >> 64) + ReferenceTscOffset + * - READ ReferenceTscSequence again. In case its value has changed + * since our first reading we need to discard ReferenceTime and repeat + * the whole sequence as the hypervisor was updating the page in + * between. + */ + do { + sequence = READ_ONCE(tsc_pg->tsc_sequence); + /* + * Make sure we read sequence before we read other values from + * TSC page. + */ + smp_rmb(); + + scale = READ_ONCE(tsc_pg->tsc_scale); + offset = READ_ONCE(tsc_pg->tsc_offset); + *cur_tsc = hv_read_hwclock(); + + /* + * Make sure we read sequence after we read all other values + * from TSC page. + */ + smp_rmb(); + + } while (READ_ONCE(tsc_pg->tsc_sequence) != sequence); + + return mul_u64_u64_shr(*cur_tsc, scale, 64) + offset; +} + +static inline u64 hv_read_tsc_page(const struct ms_hyperv_tsc_page *tsc_pg) +{ + u64 cur_tsc; + + return hv_read_tsc_page_tsc(tsc_pg, &cur_tsc); +} + +#endif