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Wed, 27 Jan 2021 20:24:16 +0000 From: Michael Kelley To: sthemmin@microsoft.com, kys@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, daniel.lezcano@linaro.org, arnd@arndb.de, linux-hyperv@vger.kernel.org Cc: mikelley@microsoft.com, linux-kernel@vger.kernel.org, x86@kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 00/10] Refactor arch specific Hyper-V code Date: Wed, 27 Jan 2021 12:23:35 -0800 Message-Id: <1611779025-21503-1-git-send-email-mikelley@microsoft.com> X-Mailer: git-send-email 1.8.3.1 Content-Type: text/plain X-Originating-IP: [131.107.174.144] X-ClientProxiedBy: MW4PR03CA0139.namprd03.prod.outlook.com (2603:10b6:303:8c::24) To MN2PR21MB1213.namprd21.prod.outlook.com (2603:10b6:208:3a::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mhkdev.corp.microsoft.com (131.107.174.144) by MW4PR03CA0139.namprd03.prod.outlook.com (2603:10b6:303:8c::24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3805.16 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?/Y81Qg7VHqO9vPVHAnRWiLHIL2jllJ587EknePBKh21EzG5kEzQvNpm3V7AB?= =?us-ascii?Q?mSvzJPxibDb3zlZ5Cy1N/mwmEWg/869SaeabP4KOxgyc7RYTdQf5XKVEHrPH?= =?us-ascii?Q?xMgo0kVEgnW8TcUtXA3/CCiXCV+UtRGfroS80HmoLvRGVNtO3PTXVmb86PcX?= =?us-ascii?Q?HSik2Jpp8BxL6nNEdEYIMUh1NTMZSsxJJ/afvUskuCxGaIN40dXaqXD/6yoz?= =?us-ascii?Q?V+UwsmtXrJFA4QSwBRZV3NYD0jAlTK+J2LB+EcPpBokEwftdFnJSHNHT9d0k?= =?us-ascii?Q?jN3dMG7N695GUIGxOop7NMXLzb1jfn+5RdFLyzwdyZe88HJIcbiSk6/LlyiM?= =?us-ascii?Q?Zw0MPHWRyTZk7PG+Hiydc7+aMICz52CWi63K86cAaf3b2pSqZpDbnM1mG28l?= =?us-ascii?Q?AWJDIqASRLt48nJ/TEl7+rUfPL2CxN29dQssc91ZAf08ESCwHWEfmVjc//b3?= =?us-ascii?Q?V1w+6WzWNKjylpiPtqNLUTcrCzdCm+Mnu4cPKek2XgvnWpZCjF1jbMg7C6iz?= =?us-ascii?Q?qtROT40jyLGdfSRESqhe8p+XY25/jnNXgXBqsNxY5lnFTJzL4vTyR0iWQqkh?= =?us-ascii?Q?NTABDzSSSsrpuTFoLo0Cicj8s5N9Pg9n0oLgvQVn3zlvALAMxzDnqXV1odTo?= =?us-ascii?Q?NxbyUDs47Zpluu6c/JkCXxNkt6oo+xmadvpTmX/t6qxekqSnYwiGtDfhB4dJ?= =?us-ascii?Q?fA9h1gi4DMmy5Hb+hTrga6YwADwkw4p4i5BFx0s7f7UBotrkcDzIfl5qVVMH?= =?us-ascii?Q?+mK0tu2P9TcraD33Qiz8el+Qyl7/bhtTAUnq7BVu9hnkXlx2WsBSseynlrSI?= =?us-ascii?Q?7FvU9jVLVxccB8PKSvXJrbLPBgVdlBv1DTfNnqWVQZGscRf4WFkOMdnS6E4Y?= =?us-ascii?Q?W6nrKceQHeR0tpHOxHa/MDSjQztZd6iUeuHNO0WieGD/nOKe2T501iClgMUo?= =?us-ascii?Q?z4TXn9/BnnzTHyHp9xaz7bOi3UUnAFNJSRz23m0q9R65ARE7TbI91OsTiN+O?= =?us-ascii?Q?QFxw6uSSxDxTfxODyIZnNrpIgvTY8cam0sd9UOgePmV9H8pL01DzUafqHp2k?= =?us-ascii?Q?U700EYju?= X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 02535152-192a-4d47-963f-08d8c3018498 X-MS-Exchange-CrossTenant-AuthSource: MN2PR21MB1213.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2021 20:24:16.1570 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: VKsoskyIrFnltYSjloICtuf87hXdAqWuR9QpqdR0oaSAFwVHIX24qp+ITW/yW6AblME8zIupfP6cesjdhR4I8Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR21MB1215 Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org To support Linux guests on Hyper-V on multiple architectures, the original approach factored out all differences between Hyper-V on x86/x64 and Hyper-V on ARM64 into functions or #defines under arch/x86 and arch/arm64. Some of these differences are truly related to the architecture, but others are more properly treated as Linux OS differences or just quirks in Hyper-V. Feedback from Arnd Bergmann[1] recommended that differences other than architecture should be incorporated into the architecture independent Hyper-V code. Each difference can be handled with conditions specific to the difference instead of tying it to the broader x86/x64 vs. ARM64. This approach reduces the amount of code under arch/x86 and arch/arm64 and keeps the non-architectural differences localized and more easily understood. This patch set implements the new approach by changing the interface between the architecture independent code and the architecture dependent code for x86/x64. The patches move code from arch/x86 to the architecture independent Hyper-V code whenever possible, and add architecture independent support needed by other architectures like ARM64. No functionality is changed for x86/x64. A subsequent patch set will provide the Hyper-V support code under arch/arm64. This patch set results in an increase in lines of code (though some of the increase is additional comments). But the lines needed under arch/arm64 in the upcoming patch set is significantly reduced, resulting in a net decrease of about 125 lines. [1] https://lore.kernel.org/lkml/CAK8P3a1hDBVembCd+6=ENUWYFz=72JBTFMrKYZ2aFd+_Q04F+g@mail.gmail.com/ Michael Kelley (10): Drivers: hv: vmbus: Move Hyper-V page allocator to arch neutral code x86/hyper-v: Move hv_message_type to architecture neutral module Drivers: hv: Redo Hyper-V synthetic MSR get/set functions Drivers: hv: vmbus: Move hyperv_report_panic_msg to arch neutral code Drivers: hv: vmbus: Handle auto EOI quirk inline Drivers: hv: vmbus: Move handling of VMbus interrupts clocksource/drivers/hyper-v: Handle vDSO differences inline clocksource/drivers/hyper-v: Handle sched_clock differences inline clocksource/drivers/hyper-v: Set clocksource rating based on Hyper-V feature clocksource/drivers/hyper-v: Move handling of STIMER0 interrupts arch/x86/hyperv/hv_init.c | 53 +------- arch/x86/include/asm/hyperv-tlfs.h | 131 ++++++++++--------- arch/x86/include/asm/mshyperv.h | 67 ++-------- arch/x86/kernel/cpu/mshyperv.c | 23 ++-- drivers/clocksource/hyperv_timer.c | 250 +++++++++++++++++++++++++------------ drivers/hv/hv.c | 93 +++++++++++--- drivers/hv/vmbus_drv.c | 89 +++++++++++-- include/asm-generic/hyperv-tlfs.h | 35 ++++++ include/asm-generic/mshyperv.h | 19 ++- include/clocksource/hyperv_timer.h | 3 +- 10 files changed, 450 insertions(+), 313 deletions(-) -- 1.8.3.1