1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * A sample program to run a User VM on the ACRN hypervisor 4 * 5 * This sample runs in a Service VM, which is a privileged VM of ACRN. 6 * CONFIG_ACRN_HSM need to be enabled in the Service VM. 7 * 8 * Guest VM code in guest16.s will be executed after the VM launched. 9 * 10 * Copyright (C) 2020 Intel Corporation. All rights reserved. 11 */ 12 #include <stdio.h> 13 #include <stdint.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #include <malloc.h> 17 #include <fcntl.h> 18 #include <unistd.h> 19 #include <signal.h> 20 #include <sys/ioctl.h> 21 #include <linux/acrn.h> 22 23 #define GUEST_MEMORY_SIZE (1024*1024) 24 void *guest_memory; 25 26 extern const unsigned char guest16[], guest16_end[]; 27 static char io_request_page[4096] __attribute__((aligned(4096))); 28 static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page; 29 30 __u16 vcpu_num; 31 __u16 vmid; 32 /* POST_STANDARD_VM_UUID1, refer to https://github.com/projectacrn/acrn-hypervisor/blob/master/hypervisor/include/common/vm_uuids.h */ 33 guid_t vm_uuid = GUID_INIT(0x385479d2, 0xd625, 0xe811, 0x86, 0x4e, 0xcb, 0x7a, 0x18, 0xb3, 0x46, 0x43); 34 35 int hsm_fd; 36 int is_running = 1; 37 38 void vm_exit(int sig) 39 { 40 sig = sig; 41 42 is_running = 0; 43 ioctl(hsm_fd, ACRN_IOCTL_PAUSE_VM, vmid); 44 ioctl(hsm_fd, ACRN_IOCTL_DESTROY_IOREQ_CLIENT, 0); 45 } 46 47 int main(int argc, char **argv) 48 { 49 int vcpu_id, ret; 50 struct acrn_vm_creation create_vm = {0}; 51 struct acrn_vm_memmap ram_map = {0}; 52 struct acrn_vcpu_regs regs; 53 struct acrn_io_request *io_req; 54 struct acrn_ioreq_notify __attribute__((aligned(8))) notify; 55 56 argc = argc; 57 argv = argv; 58 59 guest_memory = memalign(4096, GUEST_MEMORY_SIZE); 60 if (!guest_memory) { 61 printf("No enough memory!\n"); 62 return -1; 63 } 64 hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC); 65 66 memcpy(&create_vm.uuid, &vm_uuid, 16); 67 create_vm.ioreq_buf = (__u64)io_req_buf; 68 ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm); 69 printf("Created VM! [%d]\n", ret); 70 vcpu_num = create_vm.vcpu_num; 71 vmid = create_vm.vmid; 72 73 /* setup guest memory */ 74 ram_map.type = ACRN_MEMMAP_RAM; 75 ram_map.vma_base = (__u64)guest_memory; 76 ram_map.len = GUEST_MEMORY_SIZE; 77 ram_map.user_vm_pa = 0; 78 ram_map.attr = ACRN_MEM_ACCESS_RWX; 79 ret = ioctl(hsm_fd, ACRN_IOCTL_SET_MEMSEG, &ram_map); 80 printf("Set up VM memory! [%d]\n", ret); 81 82 memcpy(guest_memory, guest16, guest16_end-guest16); 83 84 /* setup vcpu registers */ 85 memset(®s, 0, sizeof(regs)); 86 regs.vcpu_id = 0; 87 regs.vcpu_regs.rip = 0; 88 89 /* CR0_ET | CR0_NE */ 90 regs.vcpu_regs.cr0 = 0x30U; 91 regs.vcpu_regs.cs_ar = 0x009FU; 92 regs.vcpu_regs.cs_sel = 0xF000U; 93 regs.vcpu_regs.cs_limit = 0xFFFFU; 94 regs.vcpu_regs.cs_base = 0 & 0xFFFF0000UL; 95 regs.vcpu_regs.rip = 0 & 0xFFFFUL; 96 97 ret = ioctl(hsm_fd, ACRN_IOCTL_SET_VCPU_REGS, ®s); 98 printf("Set up VM BSP registers! [%d]\n", ret); 99 100 /* create an ioreq client for this VM */ 101 ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_IOREQ_CLIENT, 0); 102 printf("Created IO request client! [%d]\n", ret); 103 104 /* run vm */ 105 ret = ioctl(hsm_fd, ACRN_IOCTL_START_VM, vmid); 106 printf("Start VM! [%d]\n", ret); 107 108 signal(SIGINT, vm_exit); 109 while (is_running) { 110 ret = ioctl(hsm_fd, ACRN_IOCTL_ATTACH_IOREQ_CLIENT, 0); 111 112 for (vcpu_id = 0; vcpu_id < vcpu_num; vcpu_id++) { 113 io_req = &io_req_buf[vcpu_id]; 114 if ((__sync_add_and_fetch(&io_req->processed, 0) == ACRN_IOREQ_STATE_PROCESSING) 115 && (!io_req->kernel_handled)) 116 if (io_req->type == ACRN_IOREQ_TYPE_PORTIO) { 117 int bytes, port, in; 118 119 port = io_req->reqs.pio_request.address; 120 bytes = io_req->reqs.pio_request.size; 121 in = (io_req->reqs.pio_request.direction == ACRN_IOREQ_DIR_READ); 122 printf("Guest VM %s PIO[%x] with size[%x]\n", in ? "read" : "write", port, bytes); 123 124 notify.vmid = vmid; 125 notify.vcpu = vcpu_id; 126 ioctl(hsm_fd, ACRN_IOCTL_NOTIFY_REQUEST_FINISH, ¬ify); 127 } 128 } 129 } 130 131 ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL); 132 printf("Destroy VM! [%d]\n", ret); 133 close(hsm_fd); 134 free(guest_memory); 135 return 0; 136 } 137