From patchwork Thu Jul 27 07:59:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi-De Wu X-Patchwork-Id: 707220 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3882EC25B73 for ; Thu, 27 Jul 2023 08:04:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233793AbjG0IEE (ORCPT ); Thu, 27 Jul 2023 04:04:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233208AbjG0ICr (ORCPT ); Thu, 27 Jul 2023 04:02:47 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E84834C3C; Thu, 27 Jul 2023 01:00:19 -0700 (PDT) X-UUID: 9e4530862c5311ee9cb5633481061a41-20230727 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=mgs9/vfnXB+UqBMY5BF/kprRbaIQpOC+n1Cm3gcu/rA=; b=dIel7kD29RHqXGyCdgOR3uppWJdWJ+6kh1oTrzFvZXbLZDE+hOYUS4X1AWE5eSlBGPRmuJD5la2DmE5KlHXxhmlu7VMg4cQnCPP7pU5LfNaiY6tQLjCZ76DYpqZhB+PLQhb2qQzNfaU8t3jOt7jYlK6xRlUJsQVnCJFzWyKAxWE=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.29, REQID:04c21c84-6ab7-4ad3-b1cb-70aaa0f7eb61, IP:0, U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.29, REQID:04c21c84-6ab7-4ad3-b1cb-70aaa0f7eb61, IP:0, URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:e7562a7, CLOUDID:771e97a0-0933-4333-8d4f-6c3c53ebd55b, B ulkID:230727160017Z96KAM8H,BulkQuantity:0,Recheck:0,SF:28|17|19|48|38|29,T C:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 ,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR, TF_CID_SPAM_SDM, TF_CID_SPAM_ASC, TF_CID_SPAM_FAS, TF_CID_SPAM_FSD,TF_CID_SPAM_ULS X-UUID: 9e4530862c5311ee9cb5633481061a41-20230727 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 179442857; Thu, 27 Jul 2023 16:00:14 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 27 Jul 2023 16:00:13 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 27 Jul 2023 16:00:13 +0800 From: Yi-De Wu To: Yingshiuan Pan , Ze-Yu Wang , Yi-De Wu , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Catalin Marinas , Will Deacon , Arnd Bergmann , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , David Bradil , Trilok Soni , Ivan Tseng , Jade Shih , My Chuang , Shawn Hsiao , PeiLun Suei , Liju Chen , Willix Yeh Subject: [PATCH v5 01/12] docs: geniezone: Introduce GenieZone hypervisor Date: Thu, 27 Jul 2023 15:59:54 +0800 Message-ID: <20230727080005.14474-2-yi-de.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230727080005.14474-1-yi-de.wu@mediatek.com> References: <20230727080005.14474-1-yi-de.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: "Yi-De Wu" GenieZone is MediaTek proprietary hypervisor solution, and it is running in EL2 stand alone as a type-I hypervisor. It is a pure EL2 implementation which implies it does not rely any specific host VM, and this behavior improves GenieZone's security as it limits its interface. Signed-off-by: Yingshiuan Pan Signed-off-by: Liju Chen Signed-off-by: Yi-De Wu Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202306151938.M7471qHi-lkp@intel.com/ --- Documentation/virt/geniezone/introduction.rst | 86 +++++++++++++++++++ Documentation/virt/index.rst | 1 + MAINTAINERS | 6 ++ 3 files changed, 93 insertions(+) create mode 100644 Documentation/virt/geniezone/introduction.rst diff --git a/Documentation/virt/geniezone/introduction.rst b/Documentation/virt/geniezone/introduction.rst new file mode 100644 index 000000000000..fb9fa41bcfb8 --- /dev/null +++ b/Documentation/virt/geniezone/introduction.rst @@ -0,0 +1,86 @@ +.. SPDX-License-Identifier: GPL-2.0 + +====================== +GenieZone Introduction +====================== + +Overview +======== +GenieZone hypervisor(gzvm) is a type-1 hypervisor that supports various virtual +machine types and provides security features such as TEE-like scenarios and +secure boot. It can create guest VMs for security use cases and has +virtualization capabilities for both platform and interrupt. Although the +hypervisor can be booted independently, it requires the assistance of GenieZone +hypervisor kernel driver(gzvm-ko) to leverage the ability of Linux kernel for +vCPU scheduling, memory management, inter-VM communication and virtio backend +support. + +Supported Architecture +====================== +GenieZone now only supports MediaTek ARM64 SoC. + +Features +======== + +- vCPU Management + +VM manager aims to provide vCPUs on the basis of time sharing on physical CPUs. +It requires Linux kernel in host VM for vCPU scheduling and VM power management. + +- Memory Management + +Direct use of physical memory from VMs is forbidden and designed to be dictated +to the privilege models managed by GenieZone hypervisor for security reason. +With the help of gzvm-ko, the hypervisor would be able to manipulate memory as +objects. + +- Virtual Platform + +We manage to emulate a virtual mobile platform for guest OS running on guest +VM. The platform supports various architecture-defined devices, such as +virtual arch timer, GIC, MMIO, PSCI, and exception watching...etc. + +- Inter-VM Communication + +Communication among guest VMs was provided mainly on RPC. More communication +mechanisms were to be provided in the future based on VirtIO-vsock. + +- Device Virtualization + +The solution is provided using the well-known VirtIO. The gzvm-ko would +redirect MMIO traps back to VMM where the virtual devices are mostly emulated. +Ioeventfd is implemented using eventfd for signaling host VM that some IO +events in guest VMs need to be processed. + +- Interrupt virtualization + +All Interrupts during some guest VMs running would be handled by GenieZone +hypervisor with the help of gzvm-ko, both virtual and physical ones. In case +there's no guest VM running out there, physical interrupts would be handled by +host VM directly for performance reason. Irqfd is also implemented using +eventfd for accepting vIRQ requests in gzvm-ko. + +Platform architecture component +=============================== + +- vm + +The vm component is responsible for setting up the capability and memory +management for the protected VMs. The capability is mainly about the lifecycle +control and boot context initialization. And the memory management is highly +integrated with ARM 2-stage translation tables to convert VA to IPA to PA under +proper security measures required by protected VMs. + +- vcpu + +The vcpu component is the core of virtualizing aarch64 physical CPU runnable, +and it controls the vCPU lifecycle including creating, running and destroying. +With self-defined exit handler, the vm component would be able to act +accordingly before terminated. + +- vgic + +The vgic component exposes control interfaces to Linux kernel via irqchip, and +we intend to support all SPI, PPI, and SGI. When it comes to virtual +interrupts, the GenieZone hypervisor would write to list registers and trigger +vIRQ injection in guest VMs via GIC. diff --git a/Documentation/virt/index.rst b/Documentation/virt/index.rst index 7fb55ae08598..cf12444db336 100644 --- a/Documentation/virt/index.rst +++ b/Documentation/virt/index.rst @@ -16,6 +16,7 @@ Virtualization Support coco/sev-guest coco/tdx-guest hyperv/index + geniezone/introduction .. only:: html and subproject diff --git a/MAINTAINERS b/MAINTAINERS index ae1fd58fc64c..a81903c029f2 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8741,6 +8741,12 @@ F: include/vdso/ F: kernel/time/vsyscall.c F: lib/vdso/ +GENIEZONE HYPERVISOR DRIVER +M: Yingshiuan Pan +M: Ze-Yu Wang +M: Yi-De Wu +F: Documentation/virt/geniezone/ + GENWQE (IBM Generic Workqueue Card) M: Frank Haverkamp S: Supported