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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)
23void *guest_memory;
24
25extern const unsigned char guest16[], guest16_end[];
26static char io_request_page[4096] __attribute__((aligned(4096)));
27static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page;
28
29__u16 vcpu_num;
30__u16 vmid;
31
32int hsm_fd;
33int is_running = 1;
34
35void 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
44int 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(&regs, 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, &regs);
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, &notify);
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}