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=-6.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 A4744C433DF for ; Mon, 19 Oct 2020 06:18:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A85522268 for ; Mon, 19 Oct 2020 06:18:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726629AbgJSGSX (ORCPT ); Mon, 19 Oct 2020 02:18:23 -0400 Received: from mga12.intel.com ([192.55.52.136]:48320 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726553AbgJSGSW (ORCPT ); Mon, 19 Oct 2020 02:18:22 -0400 IronPort-SDR: TZkozcMsoCmkzvDEp1qBvuP6tIvwx5+E6WWNQrv9opQgqsHbuzSul+T6Kco1zYKZFBseHAyalw 7oiu0+JPHyzw== X-IronPort-AV: E=McAfee;i="6000,8403,9778"; a="146270954" X-IronPort-AV: E=Sophos;i="5.77,393,1596524400"; d="scan'208";a="146270954" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2020 23:18:18 -0700 IronPort-SDR: Q3ku1Zycc7B42w8b+11xSddbaFjh+5r7ONnsBeMEFih8BMckMRPsk0tzwO4akINYu1UmDXAGJs B+FkeimUCzwQ== X-IronPort-AV: E=Sophos;i="5.77,393,1596524400"; d="scan'208";a="522992213" Received: from shsi6026.sh.intel.com (HELO localhost) ([10.239.147.88]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Oct 2020 23:18:14 -0700 From: shuo.a.liu@intel.com To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Greg Kroah-Hartman , "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Sean Christopherson , Yu Wang , Reinette Chatre , Shuo Liu Subject: [PATCH v5 00/17] HSM driver for ACRN hypervisor Date: Mon, 19 Oct 2020 14:17:46 +0800 Message-Id: <20201019061803.13298-1-shuo.a.liu@intel.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shuo Liu ACRN is a Type 1 reference hypervisor stack, running directly on the bare-metal hardware, and is suitable for a variety of IoT and embedded device solutions. ACRN implements a hybrid VMM architecture, using a privileged Service VM. The Service VM manages the system resources (CPU, memory, etc.) and I/O devices of User VMs. Multiple User VMs are supported, with each of them running Linux, Android OS or Windows. Both Service VM and User VMs are guest VM. Below figure shows the architecture. Service VM User VM +----------------------------+ | +------------------+ | +--------------+ | | | | | |ACRN userspace| | | | | | +--------------+ | | | | |-----------------ioctl------| | | | ... |kernel space +----------+ | | | | | | HSM | | | | Drivers | | +----------+ | | | | +--------------------|-------+ | +------------------+ +---------------------hypercall----------------------------------------+ | ACRN Hypervisor | +----------------------------------------------------------------------+ | Hardware | +----------------------------------------------------------------------+ There is only one Service VM which could run Linux as OS. In a typical case, the Service VM will be auto started when ACRN Hypervisor is booted. Then the ACRN userspace (an application running in Service VM) could be used to start/stop User VMs by communicating with ACRN Hypervisor Service Module (HSM). ACRN Hypervisor Service Module (HSM) is a middle layer that allows the ACRN userspace and Service VM OS kernel to communicate with ACRN Hypervisor and manage different User VMs. This middle layer provides the following functionalities, - Issues hypercalls to the hypervisor to manage User VMs: * VM/vCPU management * Memory management * Device passthrough * Interrupts injection - I/O requests handling from User VMs. - Exports ioctl through HSM char device. - Exports function calls for other kernel modules ACRN is focused on embedded system. So it doesn't support some features. E.g., - ACRN doesn't support VM migration. - ACRN doesn't support vCPU migration. This patch set adds the HSM to the Linux kernel. The basic ARCN support was merged to upstream already. https://lore.kernel.org/lkml/1559108037-18813-3-git-send-email-yakui.zhao@intel.com/ ChangeLog: v5: - Corrected typo in documentation. - Removed unused pr_fmt(). - Used supported constraint with a explicit MOV to R8 at beginning of ASM for hypercall interface. - Used dev_dbg() to replace dev_err() in places which might cause a DoS. - Introduced acrn_vm_list_lock as a mutex for friendly review. - Changed to use default attribute group list to add attribute files. v4: - Used acrn_dev.this_device directly for dev_*() (Reinette) - Removed the odd usage of {get|put}_device() on &acrn_dev->this_device (Greg) - Removed unused log code. (Greg) - Corrected the return error values. (Greg) - Mentioned that HSM relies hypervisor for sanity check in acrn_dev_ioctl() comments (Greg) v3: - Used {get|put}_device() helpers on &acrn_dev->this_device - Moved unused code from front patches to later ones. - Removed self-defined pr_fmt() and dev_fmt() - Provided comments for acrn_vm_list_lock. v2: - Removed API version related code. (Dave) - Replaced pr_*() by dev_*(). (Greg) - Used -ENOTTY as the error code of unsupported ioctl. (Greg) Shuo Liu (16): docs: acrn: Introduce ACRN x86/acrn: Introduce acrn_{setup, remove}_intr_handler() x86/acrn: Introduce hypercall interfaces virt: acrn: Introduce ACRN HSM basic driver virt: acrn: Introduce VM management interfaces virt: acrn: Introduce an ioctl to set vCPU registers state virt: acrn: Introduce EPT mapping management virt: acrn: Introduce I/O request management virt: acrn: Introduce PCI configuration space PIO accesses combiner virt: acrn: Introduce interfaces for PCI device passthrough virt: acrn: Introduce interrupt injection interfaces virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor virt: acrn: Introduce I/O ranges operation interfaces virt: acrn: Introduce ioeventfd virt: acrn: Introduce irqfd virt: acrn: Introduce an interface for Service VM to control vCPU Yin Fengwei (1): x86/acrn: Introduce an API to check if a VM is privileged .../userspace-api/ioctl/ioctl-number.rst | 1 + Documentation/virt/acrn/index.rst | 11 + Documentation/virt/acrn/introduction.rst | 40 ++ Documentation/virt/acrn/io-request.rst | 97 +++ Documentation/virt/index.rst | 1 + MAINTAINERS | 9 + arch/x86/include/asm/acrn.h | 71 ++ arch/x86/kernel/cpu/acrn.c | 33 +- drivers/virt/Kconfig | 2 + drivers/virt/Makefile | 1 + drivers/virt/acrn/Kconfig | 15 + drivers/virt/acrn/Makefile | 3 + drivers/virt/acrn/acrn_drv.h | 229 +++++++ drivers/virt/acrn/hsm.c | 435 ++++++++++++ drivers/virt/acrn/hypercall.h | 254 +++++++ drivers/virt/acrn/ioeventfd.c | 273 ++++++++ drivers/virt/acrn/ioreq.c | 645 ++++++++++++++++++ drivers/virt/acrn/irqfd.c | 235 +++++++ drivers/virt/acrn/mm.c | 305 +++++++++ drivers/virt/acrn/vm.c | 126 ++++ include/uapi/linux/acrn.h | 486 +++++++++++++ 21 files changed, 3271 insertions(+), 1 deletion(-) create mode 100644 Documentation/virt/acrn/index.rst create mode 100644 Documentation/virt/acrn/introduction.rst create mode 100644 Documentation/virt/acrn/io-request.rst create mode 100644 arch/x86/include/asm/acrn.h create mode 100644 drivers/virt/acrn/Kconfig create mode 100644 drivers/virt/acrn/Makefile create mode 100644 drivers/virt/acrn/acrn_drv.h create mode 100644 drivers/virt/acrn/hsm.c create mode 100644 drivers/virt/acrn/hypercall.h create mode 100644 drivers/virt/acrn/ioeventfd.c create mode 100644 drivers/virt/acrn/ioreq.c create mode 100644 drivers/virt/acrn/irqfd.c create mode 100644 drivers/virt/acrn/mm.c create mode 100644 drivers/virt/acrn/vm.c create mode 100644 include/uapi/linux/acrn.h base-commit: 18445bf405cb331117bc98427b1ba6f12418ad17 -- 2.28.0