From: Yi-De Wu <[email protected]> From: "Yingshiuan Pan" <[email protected]>
VMM use this interface to create vcpu instance which is a fd, and this fd will be for any vcpu operations, such as setting vcpu registers and accepts the most important ioctl GZVM_VCPU_RUN which requests GenieZone hypervisor to do context switch to execute VM's vcpu context. Signed-off-by: Yingshiuan Pan <[email protected]> Signed-off-by: Jerry Wang <[email protected]> Signed-off-by: kevenny hsieh <[email protected]> Signed-off-by: Liju Chen <[email protected]> Signed-off-by: Yi-De Wu <[email protected]> --- arch/arm64/geniezone/Makefile | 2 +- arch/arm64/geniezone/gzvm_arch_common.h | 18 ++ arch/arm64/geniezone/vcpu.c | 80 ++++++++ arch/arm64/geniezone/vm.c | 12 ++ drivers/virt/geniezone/Makefile | 3 +- drivers/virt/geniezone/gzvm_vcpu.c | 249 ++++++++++++++++++++++++ drivers/virt/geniezone/gzvm_vm.c | 5 + include/linux/soc/mediatek/gzvm_drv.h | 24 +++ include/uapi/linux/gzvm.h | 163 ++++++++++++++++ 9 files changed, 554 insertions(+), 2 deletions(-) create mode 100644 arch/arm64/geniezone/vcpu.c create mode 100644 drivers/virt/geniezone/gzvm_vcpu.c diff --git a/arch/arm64/geniezone/Makefile b/arch/arm64/geniezone/Makefile index 2957898cdd05..69b0a4abeab0 100644 --- a/arch/arm64/geniezone/Makefile +++ b/arch/arm64/geniezone/Makefile @@ -4,6 +4,6 @@ # include $(srctree)/drivers/virt/geniezone/Makefile -gzvm-y += vm.o +gzvm-y += vm.o vcpu.o obj-$(CONFIG_MTK_GZVM) += gzvm.o diff --git a/arch/arm64/geniezone/gzvm_arch_common.h b/arch/arm64/geniezone/gzvm_arch_common.h index e500dbe7f943..3ec7bea5651f 100644 --- a/arch/arm64/geniezone/gzvm_arch_common.h +++ b/arch/arm64/geniezone/gzvm_arch_common.h @@ -11,9 +11,15 @@ enum { GZVM_FUNC_CREATE_VM = 0, GZVM_FUNC_DESTROY_VM = 1, + GZVM_FUNC_CREATE_VCPU = 2, + GZVM_FUNC_DESTROY_VCPU = 3, GZVM_FUNC_SET_MEMREGION = 4, + GZVM_FUNC_RUN = 5, + GZVM_FUNC_GET_ONE_REG = 8, + GZVM_FUNC_SET_ONE_REG = 9, GZVM_FUNC_PROBE = 12, GZVM_FUNC_ENABLE_CAP = 13, + GZVM_FUNC_INFORM_EXIT = 14, NR_GZVM_FUNC, }; @@ -25,9 +31,15 @@ enum { #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_CREATE_VCPU GZVM_HCALL_ID(GZVM_FUNC_CREATE_VCPU) +#define MT_HVC_GZVM_DESTROY_VCPU GZVM_HCALL_ID(GZVM_FUNC_DESTROY_VCPU) #define MT_HVC_GZVM_SET_MEMREGION GZVM_HCALL_ID(GZVM_FUNC_SET_MEMREGION) +#define MT_HVC_GZVM_RUN GZVM_HCALL_ID(GZVM_FUNC_RUN) +#define MT_HVC_GZVM_GET_ONE_REG GZVM_HCALL_ID(GZVM_FUNC_GET_ONE_REG) +#define MT_HVC_GZVM_SET_ONE_REG GZVM_HCALL_ID(GZVM_FUNC_SET_ONE_REG) #define MT_HVC_GZVM_PROBE GZVM_HCALL_ID(GZVM_FUNC_PROBE) #define MT_HVC_GZVM_ENABLE_CAP GZVM_HCALL_ID(GZVM_FUNC_ENABLE_CAP) +#define MT_HVC_GZVM_INFORM_EXIT GZVM_HCALL_ID(GZVM_FUNC_INFORM_EXIT) /** * gzvm_hypcall_wrapper() - the wrapper for hvc calls @@ -49,4 +61,10 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, unsigned long a6, unsigned long a7, struct arm_smccc_res *res); +static inline unsigned int +assemble_vm_vcpu_tuple(u16 vmid, u16 vcpuid) +{ + return ((unsigned int)vmid << 16 | vcpuid); +} + #endif /* __GZVM_ARCH_COMMON_H__ */ diff --git a/arch/arm64/geniezone/vcpu.c b/arch/arm64/geniezone/vcpu.c new file mode 100644 index 000000000000..e12ea9cb4941 --- /dev/null +++ b/arch/arm64/geniezone/vcpu.c @@ -0,0 +1,80 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#include <linux/arm-smccc.h> +#include <linux/err.h> +#include <linux/uaccess.h> + +#include <linux/gzvm.h> +#include <linux/soc/mediatek/gzvm_drv.h> +#include "gzvm_arch_common.h" + +int gzvm_arch_vcpu_update_one_reg(struct gzvm_vcpu *vcpu, __u64 reg_id, + bool is_write, __u64 *data) +{ + struct arm_smccc_res res; + unsigned long a1; + int ret; + + a1 = assemble_vm_vcpu_tuple(vcpu->gzvm->vm_id, vcpu->vcpuid); + if (!is_write) { + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_GET_ONE_REG, + a1, reg_id, 0, 0, 0, 0, 0, &res); + if (ret == 0) + *data = res.a1; + } else { + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_SET_ONE_REG, + a1, reg_id, *data, 0, 0, 0, 0, &res); + } + + return ret; +} + +int gzvm_arch_vcpu_run(struct gzvm_vcpu *vcpu, __u64 *exit_reason) +{ + struct arm_smccc_res res; + unsigned long a1; + int ret; + + a1 = assemble_vm_vcpu_tuple(vcpu->gzvm->vm_id, vcpu->vcpuid); + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_RUN, a1, 0, 0, 0, 0, 0, + 0, &res); + *exit_reason = res.a1; + return ret; +} + +int gzvm_arch_destroy_vcpu(u16 vm_id, int vcpuid) +{ + struct arm_smccc_res res; + unsigned long a1; + + a1 = assemble_vm_vcpu_tuple(vm_id, vcpuid); + gzvm_hypcall_wrapper(MT_HVC_GZVM_DESTROY_VCPU, a1, 0, 0, 0, 0, 0, 0, + &res); + + return 0; +} + +/** + * gzvm_arch_create_vcpu() - Call smc to gz hypervisor to create vcpu + * @vm_id: vm id + * @vcpuid: vcpu id + * @run: Virtual address of vcpu->run + * + * Return: The wrapper helps caller to convert geniezone errno to Linux errno. + */ +int gzvm_arch_create_vcpu(u16 vm_id, int vcpuid, void *run) +{ + struct arm_smccc_res res; + unsigned long a1, a2; + int ret; + + a1 = assemble_vm_vcpu_tuple(vm_id, vcpuid); + a2 = (__u64)virt_to_phys(run); + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_CREATE_VCPU, a1, a2, 0, 0, 0, 0, + 0, &res); + + return ret; +} diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c index 0030e57bf77b..8690def2419f 100644 --- a/arch/arm64/geniezone/vm.c +++ b/arch/arm64/geniezone/vm.c @@ -51,6 +51,18 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, return gzvm_err_to_errno(res->a0); } +int gzvm_arch_inform_exit(u16 vm_id) +{ + struct arm_smccc_res res; + int ret; + + ret = gzvm_hypcall_wrapper(MT_HVC_GZVM_INFORM_EXIT, vm_id, 0, 0, 0, 0, 0, 0, &res); + if (ret) + return -ENXIO; + + return 0; +} + int gzvm_arch_probe(void) { struct arm_smccc_res res; diff --git a/drivers/virt/geniezone/Makefile b/drivers/virt/geniezone/Makefile index 25614ea3dea2..9cc453c0819b 100644 --- a/drivers/virt/geniezone/Makefile +++ b/drivers/virt/geniezone/Makefile @@ -6,4 +6,5 @@ GZVM_DIR ?= ../../../drivers/virt/geniezone -gzvm-y := $(GZVM_DIR)/gzvm_main.o $(GZVM_DIR)/gzvm_vm.o +gzvm-y := $(GZVM_DIR)/gzvm_main.o $(GZVM_DIR)/gzvm_vm.o \ + $(GZVM_DIR)/gzvm_vcpu.o diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c new file mode 100644 index 000000000000..1aca13fef422 --- /dev/null +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#include <asm/sysreg.h> +#include <linux/anon_inodes.h> +#include <linux/device.h> +#include <linux/file.h> +#include <linux/mm.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/soc/mediatek/gzvm_drv.h> + +/* maximum size needed for holding an integer */ +#define ITOA_MAX_LEN 12 + +static long gzvm_vcpu_update_one_reg(struct gzvm_vcpu *vcpu, + void __user *argp, + bool is_write) +{ + struct gzvm_one_reg reg; + void __user *reg_addr; + u64 data = 0; + u64 reg_size; + long ret; + + if (copy_from_user(®, argp, sizeof(reg))) + return -EFAULT; + + reg_addr = (void __user *)reg.addr; + reg_size = (reg.id & GZVM_REG_SIZE_MASK) >> GZVM_REG_SIZE_SHIFT; + reg_size = BIT(reg_size); + + if (reg_size != 1 && reg_size != 2 && reg_size != 4 && reg_size != 8) + return -EINVAL; + + if (is_write) { + /* GZ hypervisor would filter out invalid vcpu register access */ + if (copy_from_user(&data, reg_addr, reg_size)) + return -EFAULT; + } else { + return -EOPNOTSUPP; + } + + ret = gzvm_arch_vcpu_update_one_reg(vcpu, reg.id, is_write, &data); + + if (ret) + return ret; + + return 0; +} + +/** + * gzvm_vcpu_run() - Handle vcpu run ioctl, entry point to guest and exit + * point from guest + * @vcpu: Pointer to struct gzvm_vcpu + * @argp: Pointer to struct gzvm_vcpu_run in userspace + * + * Return: + * * 0 - Success. + * * Negative - Failure. + */ +static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) +{ + bool need_userspace = false; + u64 exit_reason = 0; + + if (copy_from_user(vcpu->run, argp, sizeof(struct gzvm_vcpu_run))) + return -EFAULT; + + for (int i = 0; i < ARRAY_SIZE(vcpu->run->padding1); i++) { + if (vcpu->run->padding1[i]) + return -EINVAL; + } + + if (vcpu->run->immediate_exit == 1) + return -EINTR; + + while (!need_userspace && !signal_pending(current)) { + gzvm_arch_vcpu_run(vcpu, &exit_reason); + + switch (exit_reason) { + case GZVM_EXIT_MMIO: + need_userspace = true; + break; + /** + * it's geniezone's responsibility to fill corresponding data + * structure + */ + case GZVM_EXIT_HYPERCALL: + fallthrough; + case GZVM_EXIT_EXCEPTION: + fallthrough; + case GZVM_EXIT_DEBUG: + fallthrough; + case GZVM_EXIT_FAIL_ENTRY: + fallthrough; + case GZVM_EXIT_INTERNAL_ERROR: + fallthrough; + case GZVM_EXIT_SYSTEM_EVENT: + fallthrough; + case GZVM_EXIT_SHUTDOWN: + need_userspace = true; + break; + case GZVM_EXIT_IRQ: + fallthrough; + case GZVM_EXIT_GZ: + break; + case GZVM_EXIT_UNKNOWN: + fallthrough; + default: + pr_err("vcpu unknown exit\n"); + need_userspace = true; + } + } + + if (copy_to_user(argp, vcpu->run, sizeof(struct gzvm_vcpu_run))) + return -EFAULT; + if (signal_pending(current)) { + // invoke hvc to inform gz to map memory + gzvm_arch_inform_exit(vcpu->gzvm->vm_id); + return -ERESTARTSYS; + } + return 0; +} + +static long gzvm_vcpu_ioctl(struct file *filp, unsigned int ioctl, + unsigned long arg) +{ + int ret = -ENOTTY; + void __user *argp = (void __user *)arg; + struct gzvm_vcpu *vcpu = filp->private_data; + + switch (ioctl) { + case GZVM_RUN: + ret = gzvm_vcpu_run(vcpu, argp); + break; + case GZVM_GET_ONE_REG: + /* !is_write */ + ret = -EOPNOTSUPP; + break; + case GZVM_SET_ONE_REG: + /* is_write */ + ret = gzvm_vcpu_update_one_reg(vcpu, argp, true); + break; + default: + break; + } + + return ret; +} + +static const struct file_operations gzvm_vcpu_fops = { + .unlocked_ioctl = gzvm_vcpu_ioctl, + .llseek = noop_llseek, +}; + +/* caller must hold the vm lock */ +static void gzvm_destroy_vcpu(struct gzvm_vcpu *vcpu) +{ + if (!vcpu) + return; + + gzvm_arch_destroy_vcpu(vcpu->gzvm->vm_id, vcpu->vcpuid); + /* clean guest's data */ + memset(vcpu->run, 0, GZVM_VCPU_RUN_MAP_SIZE); + free_pages_exact(vcpu->run, GZVM_VCPU_RUN_MAP_SIZE); + kfree(vcpu); +} + +/** + * gzvm_destroy_vcpus() - Destroy all vcpus, caller has to hold the vm lock + * + * @gzvm: vm struct that owns the vcpus + */ +void gzvm_destroy_vcpus(struct gzvm *gzvm) +{ + int i; + + for (i = 0; i < GZVM_MAX_VCPUS; i++) { + gzvm_destroy_vcpu(gzvm->vcpus[i]); + gzvm->vcpus[i] = NULL; + } +} + +/* create_vcpu_fd() - Allocates an inode for the vcpu. */ +static int create_vcpu_fd(struct gzvm_vcpu *vcpu) +{ + /* sizeof("gzvm-vcpu:") + max(strlen(itoa(vcpuid))) + null */ + char name[10 + ITOA_MAX_LEN + 1]; + + snprintf(name, sizeof(name), "gzvm-vcpu:%d", vcpu->vcpuid); + return anon_inode_getfd(name, &gzvm_vcpu_fops, vcpu, O_RDWR | O_CLOEXEC); +} + +/** + * gzvm_vm_ioctl_create_vcpu() - for GZVM_CREATE_VCPU + * @gzvm: Pointer to struct gzvm + * @cpuid: equals arg + * + * Return: Fd of vcpu, negative errno if error occurs + */ +int gzvm_vm_ioctl_create_vcpu(struct gzvm *gzvm, u32 cpuid) +{ + struct gzvm_vcpu *vcpu; + int ret; + + if (cpuid >= GZVM_MAX_VCPUS) + return -EINVAL; + + vcpu = kzalloc(sizeof(*vcpu), GFP_KERNEL); + if (!vcpu) + return -ENOMEM; + + /** + * Allocate 2 pages for data sharing between driver and gz hypervisor + * + * |- page 0 -|- page 1 -| + * |gzvm_vcpu_run|......|hwstate|.......| + * + */ + vcpu->run = alloc_pages_exact(GZVM_VCPU_RUN_MAP_SIZE, + GFP_KERNEL_ACCOUNT | __GFP_ZERO); + if (!vcpu->run) { + ret = -ENOMEM; + goto free_vcpu; + } + vcpu->vcpuid = cpuid; + vcpu->gzvm = gzvm; + mutex_init(&vcpu->lock); + + ret = gzvm_arch_create_vcpu(gzvm->vm_id, vcpu->vcpuid, vcpu->run); + if (ret < 0) + goto free_vcpu_run; + + ret = create_vcpu_fd(vcpu); + if (ret < 0) + goto free_vcpu_run; + gzvm->vcpus[cpuid] = vcpu; + + return ret; + +free_vcpu_run: + free_pages_exact(vcpu->run, GZVM_VCPU_RUN_MAP_SIZE); +free_vcpu: + kfree(vcpu); + return ret; +} diff --git a/drivers/virt/geniezone/gzvm_vm.c b/drivers/virt/geniezone/gzvm_vm.c index 89cb97985e1d..8742721f0012 100644 --- a/drivers/virt/geniezone/gzvm_vm.c +++ b/drivers/virt/geniezone/gzvm_vm.c @@ -150,6 +150,10 @@ static long gzvm_vm_ioctl(struct file *filp, unsigned int ioctl, ret = gzvm_dev_ioctl_check_extension(gzvm, arg); break; } + case GZVM_CREATE_VCPU: { + ret = gzvm_vm_ioctl_create_vcpu(gzvm, arg); + break; + } case GZVM_SET_USER_MEMORY_REGION: { struct gzvm_userspace_memory_region userspace_mem; @@ -182,6 +186,7 @@ static void gzvm_destroy_vm(struct gzvm *gzvm) mutex_lock(&gzvm->lock); + gzvm_destroy_vcpus(gzvm); gzvm_arch_destroy_vm(gzvm->vm_id); mutex_lock(&gzvm_list_lock); diff --git a/include/linux/soc/mediatek/gzvm_drv.h b/include/linux/soc/mediatek/gzvm_drv.h index 0792fefd6114..79f841af77e0 100644 --- a/include/linux/soc/mediatek/gzvm_drv.h +++ b/include/linux/soc/mediatek/gzvm_drv.h @@ -17,6 +17,7 @@ */ #define GZVM_PA_ERR_BAD (0x7ffULL << 52) +#define GZVM_VCPU_MMAP_SIZE PAGE_SIZE #define INVALID_VM_ID 0xffff /* @@ -34,8 +35,11 @@ * The following data structures are for data transferring between driver and * hypervisor, and they're aligned with hypervisor definitions */ +#define GZVM_MAX_VCPUS 8 #define GZVM_MAX_MEM_REGION 10 +#define GZVM_VCPU_RUN_MAP_SIZE (PAGE_SIZE * 2) + /** * struct mem_region_addr_range: identical to ffa memory constituent * @address: the base IPA of the constituent memory region, aligned to 4 kiB @@ -81,9 +85,18 @@ struct gzvm_memslot { u32 slot_id; }; +struct gzvm_vcpu { + struct gzvm *gzvm; + int vcpuid; + /* lock of vcpu*/ + struct mutex lock; + struct gzvm_vcpu_run *run; +}; + /** * struct gzvm: the following data structures are for data transferring between * driver and hypervisor, and they're aligned with hypervisor definitions. + * @vcpus: VM's cpu descriptors * @mm: userspace tied to this vm * @memslot: VM's memory slot descriptor * @lock: lock for list_add @@ -91,6 +104,7 @@ struct gzvm_memslot { * @vm_id: vm id */ struct gzvm { + struct gzvm_vcpu *vcpus[GZVM_MAX_VCPUS]; struct mm_struct *mm; struct gzvm_memslot memslot[GZVM_MAX_MEM_REGION]; struct mutex lock; @@ -105,6 +119,8 @@ int gzvm_err_to_errno(unsigned long err); void gzvm_destroy_all_vms(void); +void gzvm_destroy_vcpus(struct gzvm *gzvm); + /* arch-dependant functions */ int gzvm_arch_probe(void); int gzvm_arch_set_memregion(u16 vm_id, size_t buf_size, @@ -119,4 +135,12 @@ int gzvm_vm_ioctl_arch_enable_cap(struct gzvm *gzvm, int gzvm_gfn_to_hva_memslot(struct gzvm_memslot *memslot, u64 gfn, u64 *hva_memslot); +int gzvm_vm_ioctl_create_vcpu(struct gzvm *gzvm, u32 cpuid); +int gzvm_arch_vcpu_update_one_reg(struct gzvm_vcpu *vcpu, __u64 reg_id, + bool is_write, __u64 *data); +int gzvm_arch_create_vcpu(u16 vm_id, int vcpuid, void *run); +int gzvm_arch_vcpu_run(struct gzvm_vcpu *vcpu, __u64 *exit_reason); +int gzvm_arch_destroy_vcpu(u16 vm_id, int vcpuid); +int gzvm_arch_inform_exit(u16 vm_id); + #endif /* __GZVM_DRV_H__ */ diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h index a79e787c9181..1146467487ca 100644 --- a/include/uapi/linux/gzvm.h +++ b/include/uapi/linux/gzvm.h @@ -25,6 +25,30 @@ /* GZVM_CAP_PVM_SET_PROTECTED_VM only sets protected but not load pvmfw */ #define GZVM_CAP_PVM_SET_PROTECTED_VM 2 +/* + * Architecture specific registers are to be defined and ORed with + * the arch identifier. + */ +#define GZVM_REG_ARCH_ARM64 FIELD_PREP(GENMASK_ULL(63, 56), 0x60) +#define GZVM_REG_ARCH_MASK FIELD_PREP(GENMASK_ULL(63, 56), 0xff) +/* + * Reg size = BIT((reg.id & GZVM_REG_SIZE_MASK) >> GZVM_REG_SIZE_SHIFT) bytes + */ +#define GZVM_REG_SIZE_SHIFT 52 +#define GZVM_REG_SIZE_MASK FIELD_PREP(GENMASK_ULL(63, 48), 0x00f0) + +#define GZVM_REG_SIZE_U8 FIELD_PREP(GENMASK_ULL(63, 48), 0x0000) +#define GZVM_REG_SIZE_U16 FIELD_PREP(GENMASK_ULL(63, 48), 0x0010) +#define GZVM_REG_SIZE_U32 FIELD_PREP(GENMASK_ULL(63, 48), 0x0020) +#define GZVM_REG_SIZE_U64 FIELD_PREP(GENMASK_ULL(63, 48), 0x0030) +#define GZVM_REG_SIZE_U128 FIELD_PREP(GENMASK_ULL(63, 48), 0x0040) +#define GZVM_REG_SIZE_U256 FIELD_PREP(GENMASK_ULL(63, 48), 0x0050) +#define GZVM_REG_SIZE_U512 FIELD_PREP(GENMASK_ULL(63, 48), 0x0060) +#define GZVM_REG_SIZE_U1024 FIELD_PREP(GENMASK_ULL(63, 48), 0x0070) +#define GZVM_REG_SIZE_U2048 FIELD_PREP(GENMASK_ULL(63, 48), 0x0080) + +#define GZVM_REG_TYPE_GENERAL2 FIELD_PREP(GENMASK(23, 16), 0x10) + /* GZVM ioctls */ #define GZVM_IOC_MAGIC 0x92 /* gz */ @@ -51,6 +75,11 @@ struct gzvm_memory_region { #define GZVM_SET_MEMORY_REGION _IOW(GZVM_IOC_MAGIC, 0x40, \ struct gzvm_memory_region) +/* + * GZVM_CREATE_VCPU receives as a parameter the vcpu slot, + * and returns a vcpu fd. + */ +#define GZVM_CREATE_VCPU _IO(GZVM_IOC_MAGIC, 0x41) /** * struct gzvm_userspace_memory_region: gzvm userspace memory region descriptor @@ -71,6 +100,127 @@ struct gzvm_userspace_memory_region { #define GZVM_SET_USER_MEMORY_REGION _IOW(GZVM_IOC_MAGIC, 0x46, \ struct gzvm_userspace_memory_region) +/* + * ioctls for vcpu fds + */ +#define GZVM_RUN _IO(GZVM_IOC_MAGIC, 0x80) + +/* VM exit reason */ +enum { + GZVM_EXIT_UNKNOWN = 0x92920000, + GZVM_EXIT_MMIO = 0x92920001, + GZVM_EXIT_HYPERCALL = 0x92920002, + GZVM_EXIT_IRQ = 0x92920003, + GZVM_EXIT_EXCEPTION = 0x92920004, + GZVM_EXIT_DEBUG = 0x92920005, + GZVM_EXIT_FAIL_ENTRY = 0x92920006, + GZVM_EXIT_INTERNAL_ERROR = 0x92920007, + GZVM_EXIT_SYSTEM_EVENT = 0x92920008, + GZVM_EXIT_SHUTDOWN = 0x92920009, + GZVM_EXIT_GZ = 0x9292000a, +}; + +/** + * struct gzvm_vcpu_run: Same purpose as kvm_run, this struct is + * shared between userspace, kernel and + * GenieZone hypervisor + * @exit_reason: The reason why gzvm_vcpu_run has stopped running the vCPU + * @immediate_exit: Polled when the vcpu is scheduled. + * If set, immediately returns -EINTR + * @padding1: Reserved for future-proof and must be zero filled + * @mmio: The nested struct in anonymous union. Handle mmio in host side + * @fail_entry: The nested struct in anonymous union. + * Handle invalid entry address at the first run + * @exception: The nested struct in anonymous union. + * Handle exception occurred in VM + * @hypercall: The nested struct in anonymous union. + * Some hypercalls issued from VM must be handled + * @internal: The nested struct in anonymous union. The errors from hypervisor + * @system_event: The nested struct in anonymous union. + * VM's PSCI must be handled by host + * @padding: Fix it to a reasonable size future-proof for keeping the same + * struct size when adding new variables in the union is needed + * + * Keep identical layout between the 3 modules + */ +struct gzvm_vcpu_run { + /* to userspace */ + __u32 exit_reason; + __u8 immediate_exit; + __u8 padding1[3]; + /* union structure of collection of guest exit reason */ + union { + /* GZVM_EXIT_MMIO */ + struct { + /* From FAR_EL2 */ + /* The address guest tries to access */ + __u64 phys_addr; + /* The value to be written (is_write is 1) or + * be filled by user for reads (is_write is 0) + */ + __u8 data[8]; + /* From ESR_EL2 as */ + /* The size of written data. + * Only the first `size` bytes of `data` are handled + */ + __u64 size; + /* From ESR_EL2 */ + /* The register number where the data is stored */ + __u32 reg_nr; + /* From ESR_EL2 */ + /* 1 for VM to perform a write or 0 for VM to perform a read */ + __u8 is_write; + } mmio; + /* GZVM_EXIT_FAIL_ENTRY */ + struct { + /* The reason codes about hardware entry failure */ + __u64 hardware_entry_failure_reason; + /* The current processor number via smp_processor_id() */ + __u32 cpu; + } fail_entry; + /* GZVM_EXIT_EXCEPTION */ + struct { + /* Which exception vector */ + __u32 exception; + /* Exception error codes */ + __u32 error_code; + } exception; + /* GZVM_EXIT_HYPERCALL */ + struct { + /* The hypercall's arguments */ + __u64 args[8]; /* in-out */ + } hypercall; + /* GZVM_EXIT_INTERNAL_ERROR */ + struct { + /* The errors codes about GZVM_EXIT_INTERNAL_ERROR */ + __u32 suberror; + /* The number of elements used in data[] */ + __u32 ndata; + /* Keep the detailed information about GZVM_EXIT_SYSTEM_EVENT */ + __u64 data[16]; + } internal; + /* GZVM_EXIT_SYSTEM_EVENT */ + struct { +#define GZVM_SYSTEM_EVENT_SHUTDOWN 1 +#define GZVM_SYSTEM_EVENT_RESET 2 +#define GZVM_SYSTEM_EVENT_CRASH 3 +#define GZVM_SYSTEM_EVENT_WAKEUP 4 +#define GZVM_SYSTEM_EVENT_SUSPEND 5 +#define GZVM_SYSTEM_EVENT_SEV_TERM 6 +#define GZVM_SYSTEM_EVENT_S2IDLE 7 + /* System event type. + * Ex. GZVM_SYSTEM_EVENT_SHUTDOWN or GZVM_SYSTEM_EVENT_RESET...etc. + */ + __u32 type; + /* The number of elements used in data[] */ + __u32 ndata; + /* Keep the detailed information about GZVM_EXIT_SYSTEM_EVENT */ + __u64 data[16]; + } system_event; + char padding[256]; + }; +}; + /** * struct gzvm_enable_cap: The `capability support` on GenieZone hypervisor * @cap: `GZVM_CAP_ARM_PROTECTED_VM` or `GZVM_CAP_ARM_VM_IPA_SIZE` @@ -84,4 +234,17 @@ struct gzvm_enable_cap { #define GZVM_ENABLE_CAP _IOW(GZVM_IOC_MAGIC, 0xa3, \ struct gzvm_enable_cap) +/* for GZVM_GET/SET_ONE_REG */ +struct gzvm_one_reg { + __u64 id; + __u64 addr; +}; + +#define GZVM_GET_ONE_REG _IOW(GZVM_IOC_MAGIC, 0xab, \ + struct gzvm_one_reg) +#define GZVM_SET_ONE_REG _IOW(GZVM_IOC_MAGIC, 0xac, \ + struct gzvm_one_reg) + +#define GZVM_REG_GENERIC 0x0000000000000000ULL + #endif /* __GZVM_H__ */ -- 2.18.0
