From patchwork Tue Jul 30 08:24:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Liju-clr Chen X-Patchwork-Id: 13747033 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5F9A3C3DA49 for ; Tue, 30 Jul 2024 08:32:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KMR9SSQM/ctEcMMEg7d+whwPkZI/jFoE1inyS/cxoH4=; b=0b8SPT0jy4CJZW2vSpmkykbSBM B9mN/E5DOWCU23i7fT8bUrmfYuJ4Qu35nJOJheBfb30NBXOYaroftYxl6vPLxTjD3Pt3A52koQsdA UrrDmEETX3EPOJCxRplZQAaPJHhiH0FpJoxMTIVnV4aEWKoJpQDt8qVvzvF5qGeh2xqt9YsQwiKUQ Zsq08tadZRvRbUKEZvr21dpjH6LkaG7B8Vmh2Tdo2f23CDDqh4xPVtS6/8PV3f7wLDKSFQWvtGLAa vr/J4pQEZX22FdyFLZdm+aJ8ylM+zdpdUe2Y4weUb6elnOMMiaTmqV8MJVQOEXZS09ZsfM4jviAgr AT6w043Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYiHk-0000000EHv4-3HpT; Tue, 30 Jul 2024 08:32:44 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sYiAY-0000000EEJg-04fJ; Tue, 30 Jul 2024 08:25:19 +0000 X-UUID: 3e5c7c344e4d11ef955bff358274dad2-20240730 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=KMR9SSQM/ctEcMMEg7d+whwPkZI/jFoE1inyS/cxoH4=; b=i+r6gn1uKEZ8SWHwYdznZODHw8npE0Ynyycg07BlglpnhLN0k3UpG/us4cnglW6xXsfGQ4/pnhPHokoEe8VgeQw1nufQUo4Vbrnjl58V93kpOBMdYk7/+NZjQgessi8caFGs5kqgJdsSn+/gdo6ZU79qTato5Wufuixf1LdD9oc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.41,REQID:f723d43a-d04d-4065-853a-7f7f3a27192d,IP:0,U RL:0,TC:0,Content:-25,EDM:-25,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-50 X-CID-META: VersionHash:6dc6a47,CLOUDID:a8d1edd5-0d68-4615-a20f-01d7bd41f0bb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:1,IP:nil,UR L:11|1,File:nil,RT: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,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 3e5c7c344e4d11ef955bff358274dad2-20240730 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1247215266; Tue, 30 Jul 2024 01:25:13 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 30 Jul 2024 16:24:37 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 30 Jul 2024 16:24:36 +0800 From: Liju-clr Chen To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Catalin Marinas , Will Deacon , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Richard Cochran , Matthias Brugger , AngeloGioacchino Del Regno , Liju-clr Chen , Yingshiuan Pan , Ze-yu Wang CC: , , , , , , , Shawn Hsiao , PeiLun Suei , Chi-shen Yeh , Kevenny Hsieh Subject: [PATCH v12 04/24] virt: geniezone: Add GenieZone hypervisor driver Date: Tue, 30 Jul 2024 16:24:16 +0800 Message-ID: <20240730082436.9151-5-liju-clr.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240730082436.9151-1-liju-clr.chen@mediatek.com> References: <20240730082436.9151-1-liju-clr.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240730_012518_182980_63082415 X-CRM114-Status: GOOD ( 28.86 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: Yingshiuan Pan 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. Add the basic hypervisor driver. Subsequent patches will add more supported features to this driver. Signed-off-by: Yingshiuan Pan Co-developed-by: Jerry Wang Signed-off-by: Jerry Wang Signed-off-by: Yi-De Wu Signed-off-by: Liju Chen --- MAINTAINERS | 3 + arch/arm64/Kbuild | 1 + arch/arm64/geniezone/Makefile | 9 +++ arch/arm64/geniezone/gzvm_arch_common.h | 44 +++++++++++++ arch/arm64/geniezone/vm.c | 63 ++++++++++++++++++ drivers/virt/Kconfig | 2 + drivers/virt/geniezone/Kconfig | 16 +++++ drivers/virt/geniezone/Makefile | 9 +++ drivers/virt/geniezone/gzvm_main.c | 87 +++++++++++++++++++++++++ include/linux/soc/mediatek/gzvm_drv.h | 25 +++++++ 10 files changed, 259 insertions(+) create mode 100644 arch/arm64/geniezone/Makefile create mode 100644 arch/arm64/geniezone/gzvm_arch_common.h create mode 100644 arch/arm64/geniezone/vm.c create mode 100644 drivers/virt/geniezone/Kconfig create mode 100644 drivers/virt/geniezone/Makefile create mode 100644 drivers/virt/geniezone/gzvm_main.c create mode 100644 include/linux/soc/mediatek/gzvm_drv.h diff --git a/MAINTAINERS b/MAINTAINERS index e9d600ae48bb..bba3a029d479 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9452,6 +9452,9 @@ M: Ze-Yu Wang M: Liju Chen F: Documentation/devicetree/bindings/firmware/mediatek,geniezone.yaml F: Documentation/virt/geniezone/ +F: arch/arm64/geniezone/ +F: drivers/virt/geniezone/ +F: include/linux/soc/mediatek/gzvm_drv.h GENWQE (IBM Generic Workqueue Card) M: Frank Haverkamp diff --git a/arch/arm64/Kbuild b/arch/arm64/Kbuild index 5bfbf7d79c99..0c3cca572919 100644 --- a/arch/arm64/Kbuild +++ b/arch/arm64/Kbuild @@ -4,6 +4,7 @@ obj-$(CONFIG_KVM) += kvm/ obj-$(CONFIG_XEN) += xen/ obj-$(subst m,y,$(CONFIG_HYPERV)) += hyperv/ obj-$(CONFIG_CRYPTO) += crypto/ +obj-$(CONFIG_MTK_GZVM) += geniezone/ # for cleaning subdir- += boot diff --git a/arch/arm64/geniezone/Makefile b/arch/arm64/geniezone/Makefile new file mode 100644 index 000000000000..2957898cdd05 --- /dev/null +++ b/arch/arm64/geniezone/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Main Makefile for gzvm, this one includes drivers/virt/geniezone/Makefile +# +include $(srctree)/drivers/virt/geniezone/Makefile + +gzvm-y += vm.o + +obj-$(CONFIG_MTK_GZVM) += gzvm.o diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h new file mode 100644 index 000000000000..660c7cf3fc18 --- /dev/null +++ b/arch/arm64/geniezone/gzvm_arch_common.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#ifndef __GZVM_ARCH_COMMON_H__ +#define __GZVM_ARCH_COMMON_H__ + +#include + +enum { + GZVM_FUNC_PROBE = 12, + NR_GZVM_FUNC, +}; + +#define SMC_ENTITY_MTK 59 +#define GZVM_FUNCID_START (0x1000) +#define GZVM_HCALL_ID(func) \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \ + SMC_ENTITY_MTK, (GZVM_FUNCID_START + (func))) + +#define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE) + +/** + * gzvm_hypcall_wrapper() - the wrapper for hvc calls + * @a0: argument passed in registers 0 + * @a1: argument passed in registers 1 + * @a2: argument passed in registers 2 + * @a3: argument passed in registers 3 + * @a4: argument passed in registers 4 + * @a5: argument passed in registers 5 + * @a6: argument passed in registers 6 + * @a7: argument passed in registers 7 + * @res: result values from registers 0 to 3 + * + * Return: The wrapper helps caller to convert geniezone errno to Linux errno. + */ +int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm_smccc_res *res); + +#endif /* __GZVM_ARCH_COMMON_H__ */ diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c new file mode 100644 index 000000000000..dce933f0c122 --- /dev/null +++ b/arch/arm64/geniezone/vm.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#include +#include +#include + +#include +#include "gzvm_arch_common.h" + +/** + * gzvm_hypcall_wrapper() - the wrapper for hvc calls + * @a0: arguments passed in registers 0 + * @a1: arguments passed in registers 1 + * @a2: arguments passed in registers 2 + * @a3: arguments passed in registers 3 + * @a4: arguments passed in registers 4 + * @a5: arguments passed in registers 5 + * @a6: arguments passed in registers 6 + * @a7: arguments passed in registers 7 + * @res: result values from registers 0 to 3 + * + * Return: The wrapper helps caller to convert geniezone errno to Linux errno. + */ +int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, + unsigned long a2, unsigned long a3, + unsigned long a4, unsigned long a5, + unsigned long a6, unsigned long a7, + struct arm_smccc_res *res) +{ + struct arm_smccc_1_2_regs res_1_2; + struct arm_smccc_1_2_regs args = { + .a0 = a0, + .a1 = a1, + .a2 = a2, + .a3 = a3, + .a4 = a4, + .a5 = a5, + .a6 = a6, + .a7 = a7, + }; + arm_smccc_1_2_hvc(&args, &res_1_2); + res->a0 = res_1_2.a0; + res->a1 = res_1_2.a1; + res->a2 = res_1_2.a2; + res->a3 = res_1_2.a3; + + return gzvm_err_to_errno(res->a0); +} + +int gzvm_arch_probe(void) +{ + struct arm_smccc_res res; + int ret; + + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_PROBE, 0, 0, 0, 0, 0, 0, 0, &res); + if (ret) + return -ENXIO; + + return 0; +} diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig index d8c848cf09a6..848eb97202d1 100644 --- a/drivers/virt/Kconfig +++ b/drivers/virt/Kconfig @@ -49,4 +49,6 @@ source "drivers/virt/acrn/Kconfig" source "drivers/virt/coco/Kconfig" +source "drivers/virt/geniezone/Kconfig" + endif diff --git a/drivers/virt/geniezone/Kconfig b/drivers/virt/geniezone/Kconfig new file mode 100644 index 000000000000..b17c06c91074 --- /dev/null +++ b/drivers/virt/geniezone/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config MTK_GZVM + tristate "GenieZone Hypervisor driver for guest VM operation" + depends on ARM64 && EVENTFD + help + This driver, gzvm, enables to run guest VMs on MTK GenieZone + hypervisor. It exports kvm-like interfaces for VMM (e.g., crosvm) in + order to operate guest VMs on GenieZone hypervisor. + + GenieZone hypervisor now only supports MediaTek SoC and arm64 + architecture. + + Select M if you want it be built as a module (gzvm.ko). + + If unsure, say N. diff --git a/drivers/virt/geniezone/Makefile b/drivers/virt/geniezone/Makefile new file mode 100644 index 000000000000..3a82e5fddf90 --- /dev/null +++ b/drivers/virt/geniezone/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for GenieZone driver, this file should be include in arch's +# to avoid two ko being generated. +# + +GZVM_DIR ?= ../../../drivers/virt/geniezone + +gzvm-y := $(GZVM_DIR)/gzvm_main.o diff --git a/drivers/virt/geniezone/gzvm_main.c b/drivers/virt/geniezone/gzvm_main.c new file mode 100644 index 000000000000..38609c32e9ab --- /dev/null +++ b/drivers/virt/geniezone/gzvm_main.c @@ -0,0 +1,87 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#include +#include +#include +#include +#include +#include +#include + +/** + * gzvm_err_to_errno() - Convert geniezone return value to standard errno + * + * @err: Return value from geniezone function return + * + * Return: Standard errno + */ +int gzvm_err_to_errno(unsigned long err) +{ + int gz_err = (int)err; + + switch (gz_err) { + case 0: + return 0; + case ERR_NO_MEMORY: + return -ENOMEM; + case ERR_NOT_SUPPORTED: + fallthrough; + case ERR_NOT_IMPLEMENTED: + return -EOPNOTSUPP; + case ERR_FAULT: + return -EFAULT; + default: + break; + } + + return -EINVAL; +} + +static const struct file_operations gzvm_chardev_ops = { + .llseek = noop_llseek, +}; + +static struct miscdevice gzvm_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = KBUILD_MODNAME, + .fops = &gzvm_chardev_ops, +}; + +static int gzvm_drv_probe(struct platform_device *pdev) +{ + if (gzvm_arch_probe() != 0) { + dev_err(&pdev->dev, "Not found available conduit\n"); + return -ENODEV; + } + + return misc_register(&gzvm_dev); +} + +static void gzvm_drv_remove(struct platform_device *pdev) +{ + misc_deregister(&gzvm_dev); +} + +static const struct of_device_id gzvm_of_match[] = { + { .compatible = "mediatek,geniezone" }, + {/* sentinel */}, +}; + +static struct platform_driver gzvm_driver = { + .probe = gzvm_drv_probe, + .remove = gzvm_drv_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = gzvm_of_match, + }, +}; + +module_platform_driver(gzvm_driver); + +MODULE_DEVICE_TABLE(of, gzvm_of_match); +MODULE_AUTHOR("MediaTek"); +MODULE_DESCRIPTION("GenieZone interface for VMM"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/soc/mediatek/gzvm_drv.h b/include/linux/soc/mediatek/gzvm_drv.h new file mode 100644 index 000000000000..907f2f984de9 --- /dev/null +++ b/include/linux/soc/mediatek/gzvm_drv.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#ifndef __GZVM_DRV_H__ +#define __GZVM_DRV_H__ + +/* + * These are the definitions of APIs between GenieZone hypervisor and driver, + * there's no need to be visible to uapi. Furthermore, we need GenieZone + * specific error code in order to map to Linux errno + */ +#define NO_ERROR (0) +#define ERR_NO_MEMORY (-5) +#define ERR_NOT_SUPPORTED (-24) +#define ERR_NOT_IMPLEMENTED (-27) +#define ERR_FAULT (-40) + +int gzvm_err_to_errno(unsigned long err); + +/* arch-dependant functions */ +int gzvm_arch_probe(void); + +#endif /* __GZVM_DRV_H__ */