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Wed, 29 May 2024 16:42:42 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 29 May 2024 16:42:40 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 29 May 2024 16:42:40 +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: , , , , , , , David Bradil , Trilok Soni , Shawn Hsiao , PeiLun Suei , Chi-shen Yeh , Kevenny Hsieh Subject: [PATCH v11 05/21] virt: geniezone: Add vm support Date: Wed, 29 May 2024 16:42:23 +0800 Message-ID: <20240529084239.11478-6-liju-clr.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240529084239.11478-1-liju-clr.chen@mediatek.com> References: <20240529084239.11478-1-liju-clr.chen@mediatek.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--19.523800-8.000000 X-TMASE-MatchedRID: Jz4HHHAzncYlUAqjdiICKBn0UD4GU5IqQBnqdxuJ5SCY5NBG7YIbVw2C UGzZxN2d8AyWk2NFMNbVL7DIQyVd754dOTBCL+zXA9lly13c/gEW40XiUkbrGz/90OQ2nJ+7a9e 9JE2KBN0Z7JX1lkS/Bd9D3868BaEcIiy3Pxq6O+FHQFjzAbvJEPi4nVERfgwdNa1ImygeaAtVJ0 ADqZV4huT03QcW1KNjgmX+NobYg68I1Z5Xryf06B3EEAbn+GRbvJ9Xvh5CmT5UjspoiX02FwaTa lM8C773wvUxdKBGcQx+QQJwTYOt8oALX2fTNBeIGVyS87Wb4lzylcnpAborusOtrkhuZC9Wmzbo lkqUskbUfMJPpS3KKKCX8ek9LY/nuyXwa/V5eQrYxkZC4pzxSA1D0DXwcgIhycmFNidOeD2RbGV jAxwIe8R8uH5v1UzhgDLqnrRlXrZ8nn9tnqel2MprJP8FBOIaA/3R8k/14e0= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--19.523800-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 6FC205CBFE095F2539E8505C476D863CB304EE2DE94366D53E8DEA33D67ED5732000:8 X-MTK: N From: Yi-De Wu From: "Yingshiuan Pan" 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. Signed-off-by: Yingshiuan Pan Signed-off-by: Jerry Wang Signed-off-by: Liju Chen Signed-off-by: Yi-De Wu --- MAINTAINERS | 1 + arch/arm64/geniezone/gzvm_arch_common.h | 4 + arch/arm64/geniezone/vm.c | 27 ++++++ drivers/virt/geniezone/Makefile | 2 +- drivers/virt/geniezone/gzvm_main.c | 16 ++++ drivers/virt/geniezone/gzvm_vm.c | 107 ++++++++++++++++++++++++ include/linux/soc/mediatek/gzvm_drv.h | 27 ++++++ include/uapi/linux/gzvm.h | 25 ++++++ 8 files changed, 208 insertions(+), 1 deletion(-) create mode 100644 drivers/virt/geniezone/gzvm_vm.c create mode 100644 include/uapi/linux/gzvm.h diff --git a/MAINTAINERS b/MAINTAINERS index db6ba2f1e3ba..671b09087b90 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9279,6 +9279,7 @@ F: Documentation/virt/geniezone/ F: arch/arm64/geniezone/ F: drivers/virt/geniezone/ F: include/linux/soc/mediatek/gzvm_drv.h +F: include/uapi/linux/gzvm.h GENWQE (IBM Generic Workqueue Card) M: Frank Haverkamp diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h index 660c7cf3fc18..60ee5ed2b39f 100644 --- a/arch/arm64/geniezone/gzvm_arch_common.h +++ b/arch/arm64/geniezone/gzvm_arch_common.h @@ -9,6 +9,8 @@ #include enum { + GZVM_FUNC_CREATE_VM = 0, + GZVM_FUNC_DESTROY_VM = 1, GZVM_FUNC_PROBE = 12, NR_GZVM_FUNC, }; @@ -19,6 +21,8 @@ enum { ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \ SMC_ENTITY_MTK, (GZVM_FUNCID_START + (func))) +#define MT_HVC_GZVM_CREATE_VM GZVM_HCALL_ID(GZVM_FUNC_CREATE_VM) +#define MT_HVC_GZVM_DESTROY_VM GZVM_HCALL_ID(GZVM_FUNC_DESTROY_VM) #define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE) /** diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c index dce933f0c122..8ee5490d604a 100644 --- a/arch/arm64/geniezone/vm.c +++ b/arch/arm64/geniezone/vm.c @@ -7,6 +7,7 @@ #include #include +#include #include #include "gzvm_arch_common.h" @@ -61,3 +62,29 @@ int gzvm_arch_probe(void) return 0; } + +/** + * gzvm_arch_create_vm() - create vm + * @vm_type: VM type. Only supports Linux VM now. + * + * Return: + * * positive value - VM ID + * * -ENOMEM - Memory not enough for storing VM data + */ +int gzvm_arch_create_vm(unsigned long vm_type) +{ + struct arm_smccc_res res; + int ret; + + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_CREATE_VM, vm_type, 0, 0, 0, 0, + 0, 0, &res); + return ret ? ret : res.a1; +} + +int gzvm_arch_destroy_vm(u16 vm_id) +{ + struct arm_smccc_res res; + + return gzvm_hypcall_wrapper(MT_HVC_GZVM_DESTROY_VM, vm_id, 0, 0, 0, 0, + 0, 0, &res); +} diff --git a/drivers/virt/geniezone/Makefile b/drivers/virt/geniezone/Makefile index 3a82e5fddf90..25614ea3dea2 100644 --- a/drivers/virt/geniezone/Makefile +++ b/drivers/virt/geniezone/Makefile @@ -6,4 +6,4 @@ GZVM_DIR ?= ../../../drivers/virt/geniezone -gzvm-y := $(GZVM_DIR)/gzvm_main.o +gzvm-y := $(GZVM_DIR)/gzvm_main.o $(GZVM_DIR)/gzvm_vm.o diff --git a/drivers/virt/geniezone/gzvm_main.c b/drivers/virt/geniezone/gzvm_main.c index efd42b5ab871..8704549c5956 100644 --- a/drivers/virt/geniezone/gzvm_main.c +++ b/drivers/virt/geniezone/gzvm_main.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -40,7 +41,21 @@ int gzvm_err_to_errno(unsigned long err) return -EINVAL; } +static long gzvm_dev_ioctl(struct file *filp, unsigned int cmd, + unsigned long user_args) +{ + switch (cmd) { + case GZVM_CREATE_VM: + return gzvm_dev_ioctl_create_vm(user_args); + default: + break; + } + + return -ENOTTY; +} + static const struct file_operations gzvm_chardev_ops = { + .unlocked_ioctl = gzvm_dev_ioctl, .llseek = noop_llseek, }; @@ -62,6 +77,7 @@ static int gzvm_drv_probe(struct platform_device *pdev) static int gzvm_drv_remove(struct platform_device *pdev) { + gzvm_destroy_all_vms(); misc_deregister(&gzvm_dev); return 0; } diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c new file mode 100644 index 000000000000..76722dba6b1f --- /dev/null +++ b/drivers/virt/geniezone/gzvm_vm.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static DEFINE_MUTEX(gzvm_list_lock); +static LIST_HEAD(gzvm_list); + +static void gzvm_destroy_vm(struct gzvm *gzvm) +{ + pr_debug("VM-%u is going to be destroyed\n", gzvm->vm_id); + + mutex_lock(&gzvm->lock); + + gzvm_arch_destroy_vm(gzvm->vm_id); + + mutex_lock(&gzvm_list_lock); + list_del(&gzvm->vm_list); + mutex_unlock(&gzvm_list_lock); + + mutex_unlock(&gzvm->lock); + + kfree(gzvm); +} + +static int gzvm_vm_release(struct inode *inode, struct file *filp) +{ + struct gzvm *gzvm = filp->private_data; + + gzvm_destroy_vm(gzvm); + return 0; +} + +static const struct file_operations gzvm_vm_fops = { + .release = gzvm_vm_release, + .llseek = noop_llseek, +}; + +static struct gzvm *gzvm_create_vm(unsigned long vm_type) +{ + int ret; + struct gzvm *gzvm; + + gzvm = kzalloc(sizeof(*gzvm), GFP_KERNEL); + if (!gzvm) + return ERR_PTR(-ENOMEM); + + ret = gzvm_arch_create_vm(vm_type); + if (ret < 0) { + kfree(gzvm); + return ERR_PTR(ret); + } + + gzvm->vm_id = ret; + gzvm->mm = current->mm; + mutex_init(&gzvm->lock); + + mutex_lock(&gzvm_list_lock); + list_add(&gzvm->vm_list, &gzvm_list); + mutex_unlock(&gzvm_list_lock); + + pr_debug("VM-%u is created\n", gzvm->vm_id); + + return gzvm; +} + +/** + * gzvm_dev_ioctl_create_vm - Create vm fd + * @vm_type: VM type. Only supports Linux VM now. + * + * Return: fd of vm, negative if error + */ +int gzvm_dev_ioctl_create_vm(unsigned long vm_type) +{ + struct gzvm *gzvm; + + gzvm = gzvm_create_vm(vm_type); + if (IS_ERR(gzvm)) + return PTR_ERR(gzvm); + + return anon_inode_getfd("gzvm-vm", &gzvm_vm_fops, gzvm, + O_RDWR | O_CLOEXEC); +} + +void gzvm_destroy_all_vms(void) +{ + struct gzvm *gzvm, *tmp; + + mutex_lock(&gzvm_list_lock); + if (list_empty(&gzvm_list)) + goto out; + + list_for_each_entry_safe(gzvm, tmp, &gzvm_list, vm_list) + gzvm_destroy_vm(gzvm); + +out: + mutex_unlock(&gzvm_list_lock); +} diff --git a/include/linux/soc/mediatek/gzvm_drv.h b/include/linux/soc/mediatek/gzvm_drv.h index 907f2f984de9..e7c29c826a7c 100644 --- a/include/linux/soc/mediatek/gzvm_drv.h +++ b/include/linux/soc/mediatek/gzvm_drv.h @@ -6,6 +6,12 @@ #ifndef __GZVM_DRV_H__ #define __GZVM_DRV_H__ +#include +#include +#include + +#define INVALID_VM_ID 0xffff + /* * These are the definitions of APIs between GenieZone hypervisor and driver, * there's no need to be visible to uapi. Furthermore, we need GenieZone @@ -17,9 +23,30 @@ #define ERR_NOT_IMPLEMENTED (-27) #define ERR_FAULT (-40) +/** + * struct gzvm: the following data structures are for data transferring between + * driver and hypervisor, and they're aligned with hypervisor definitions. + * @mm: userspace tied to this vm + * @lock: lock for list_add + * @vm_list: list head for vm list + * @vm_id: vm id + */ +struct gzvm { + struct mm_struct *mm; + struct mutex lock; + struct list_head vm_list; + u16 vm_id; +}; + +int gzvm_dev_ioctl_create_vm(unsigned long vm_type); + int gzvm_err_to_errno(unsigned long err); +void gzvm_destroy_all_vms(void); + /* arch-dependant functions */ int gzvm_arch_probe(void); +int gzvm_arch_create_vm(unsigned long vm_type); +int gzvm_arch_destroy_vm(u16 vm_id); #endif /* __GZVM_DRV_H__ */ diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h new file mode 100644 index 000000000000..c26c7720fab7 --- /dev/null +++ b/include/uapi/linux/gzvm.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +/** + * DOC: UAPI of GenieZone Hypervisor + * + * This file declares common data structure shared among user space, + * kernel space, and GenieZone hypervisor. + */ +#ifndef __GZVM_H__ +#define __GZVM_H__ + +#include +#include +#include + +/* GZVM ioctls */ +#define GZVM_IOC_MAGIC 0x92 /* gz */ + +/* ioctls for /dev/gzvm fds */ +#define GZVM_CREATE_VM _IO(GZVM_IOC_MAGIC, 0x01) /* Returns a Geniezone VM fd */ + +#endif /* __GZVM_H__ */