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 needs 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 <fcntl.h> 17 #include <unistd.h> 18 #include <signal.h> 19 #include <sys/ioctl.h> 20 #include <linux/acrn.h> 21 22 #define GUEST_MEMORY_SIZE (1024*1024) 23 void *guest_memory; 24 25 extern const unsigned char guest16[], guest16_end[]; 26 static char io_request_page[4096] __attribute__((aligned(4096))); 27 static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page; 28 29 __u16 vcpu_num; 30 __u16 vmid; 31 32 int hsm_fd; 33 int is_running = 1; 34 35 void vm_exit(int sig) 36 { 37 sig = sig; 38 39 is_running = 0; 40 ioctl(hsm_fd, ACRN_IOCTL_PAUSE_VM, vmid); 41 ioctl(hsm_fd, ACRN_IOCTL_DESTROY_IOREQ_CLIENT, 0); 42 } 43 44 int main(int argc, char **argv) 45 { 46 int vcpu_id, ret; 47 struct acrn_vm_creation create_vm = {0}; 48 struct acrn_vm_memmap ram_map = {0}; 49 struct acrn_vcpu_regs regs; 50 struct acrn_io_request *io_req; 51 struct acrn_ioreq_notify __attribute__((aligned(8))) notify; 52 53 argc = argc; 54 argv = argv; 55 56 ret = posix_memalign(&guest_memory, 4096, GUEST_MEMORY_SIZE); 57 if (ret < 0) { 58 printf("Not enough memory!\n"); 59 return -1; 60 } 61 hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC); 62 63 create_vm.ioreq_buf = (__u64)io_req_buf; 64 ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm); 65 printf("Created VM! [%d]\n", ret); 66 vcpu_num = create_vm.vcpu_num; 67 vmid = create_vm.vmid; 68 69 /* setup guest memory */ 70 ram_map.type = ACRN_MEMMAP_RAM; 71 ram_map.vma_base = (__u64)guest_memory; 72 ram_map.len = GUEST_MEMORY_SIZE; 73 ram_map.user_vm_pa = 0; 74 ram_map.attr = ACRN_MEM_ACCESS_RWX; 75 ret = ioctl(hsm_fd, ACRN_IOCTL_SET_MEMSEG, &ram_map); 76 printf("Set up VM memory! [%d]\n", ret); 77 78 memcpy(guest_memory, guest16, guest16_end-guest16); 79 80 /* setup vcpu registers */ 81 memset(®s, 0, sizeof(regs)); 82 regs.vcpu_id = 0; 83 regs.vcpu_regs.rip = 0; 84 85 /* CR0_ET | CR0_NE */ 86 regs.vcpu_regs.cr0 = 0x30U; 87 regs.vcpu_regs.cs_ar = 0x009FU; 88 regs.vcpu_regs.cs_sel = 0xF000U; 89 regs.vcpu_regs.cs_limit = 0xFFFFU; 90 regs.vcpu_regs.cs_base = 0 & 0xFFFF0000UL; 91 regs.vcpu_regs.rip = 0 & 0xFFFFUL; 92 93 ret = ioctl(hsm_fd, ACRN_IOCTL_SET_VCPU_REGS, ®s); 94 printf("Set up VM BSP registers! [%d]\n", ret); 95 96 /* create an ioreq client for this VM */ 97 ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_IOREQ_CLIENT, 0); 98 printf("Created IO request client! [%d]\n", ret); 99 100 /* run vm */ 101 ret = ioctl(hsm_fd, ACRN_IOCTL_START_VM, vmid); 102 printf("Start VM! [%d]\n", ret); 103 104 signal(SIGINT, vm_exit); 105 while (is_running) { 106 ret = ioctl(hsm_fd, ACRN_IOCTL_ATTACH_IOREQ_CLIENT, 0); 107 108 for (vcpu_id = 0; vcpu_id < vcpu_num; vcpu_id++) { 109 io_req = &io_req_buf[vcpu_id]; 110 if ((__sync_add_and_fetch(&io_req->processed, 0) == ACRN_IOREQ_STATE_PROCESSING) 111 && (!io_req->kernel_handled)) 112 if (io_req->type == ACRN_IOREQ_TYPE_PORTIO) { 113 int bytes, port, in; 114 115 port = io_req->reqs.pio_request.address; 116 bytes = io_req->reqs.pio_request.size; 117 in = (io_req->reqs.pio_request.direction == ACRN_IOREQ_DIR_READ); 118 printf("Guest VM %s PIO[%x] with size[%x]\n", in ? "read" : "write", port, bytes); 119 120 notify.vmid = vmid; 121 notify.vcpu = vcpu_id; 122 ioctl(hsm_fd, ACRN_IOCTL_NOTIFY_REQUEST_FINISH, ¬ify); 123 } 124 } 125 } 126 127 ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL); 128 printf("Destroy VM! [%d]\n", ret); 129 close(hsm_fd); 130 free(guest_memory); 131 return 0; 132 } 133