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1// SPDX-License-Identifier: GPL-2.02/*3 * A sample program to run a User VM on the ACRN hypervisor4 *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(®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