// SPDX-License-Identifier: GPL-2.0/* * A sample program to run a User VM on the ACRN hypervisor * * This sample runs in a Service VM, which is a privileged VM of ACRN. * CONFIG_ACRN_HSM needs to be enabled in the Service VM. * * Guest VM code in guest16.s will be executed after the VM launched. * * Copyright (C) 2020 Intel Corporation. All rights reserved. */#include <stdio.h>#include <stdint.h>#include <stdlib.h>#include <string.h>#include <fcntl.h>#include <unistd.h>#include <signal.h>#include <sys/ioctl.h>#include <linux/acrn.h> #define GUEST_MEMORY_SIZE	(1024*1024)void *guest_memory; extern const unsigned char guest16[], guest16_end[];static char io_request_page[4096] __attribute__((aligned(4096)));static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page; __u16 vcpu_num;__u16 vmid; int hsm_fd;int is_running = 1; void vm_exit(int sig){	sig = sig; 	is_running = 0;	ioctl(hsm_fd, ACRN_IOCTL_PAUSE_VM, vmid);	ioctl(hsm_fd, ACRN_IOCTL_DESTROY_IOREQ_CLIENT, 0);} int main(int argc, char **argv){	int vcpu_id, ret;	struct acrn_vm_creation create_vm = {0};	struct acrn_vm_memmap ram_map = {0};	struct acrn_vcpu_regs regs;	struct acrn_io_request *io_req;	struct acrn_ioreq_notify __attribute__((aligned(8))) notify; 	argc = argc;	argv = argv; 	ret = posix_memalign(&guest_memory, 4096, GUEST_MEMORY_SIZE);	if (ret < 0) {		printf("Not enough memory!\n");		return -1;	}	hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC); 	create_vm.ioreq_buf = (__u64)io_req_buf;	ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm);	printf("Created VM! [%d]\n", ret);	vcpu_num = create_vm.vcpu_num;	vmid = create_vm.vmid; 	/* setup guest memory */	ram_map.type = ACRN_MEMMAP_RAM;	ram_map.vma_base = (__u64)guest_memory;	ram_map.len = GUEST_MEMORY_SIZE;	ram_map.user_vm_pa = 0;	ram_map.attr = ACRN_MEM_ACCESS_RWX;	ret = ioctl(hsm_fd, ACRN_IOCTL_SET_MEMSEG, &ram_map);	printf("Set up VM memory! [%d]\n", ret); 	memcpy(guest_memory, guest16, guest16_end-guest16); 	/* setup vcpu registers */	memset(&regs, 0, sizeof(regs));	regs.vcpu_id = 0;	regs.vcpu_regs.rip = 0; 	/* CR0_ET | CR0_NE */	regs.vcpu_regs.cr0 = 0x30U;	regs.vcpu_regs.cs_ar = 0x009FU;	regs.vcpu_regs.cs_sel = 0xF000U;	regs.vcpu_regs.cs_limit = 0xFFFFU;	regs.vcpu_regs.cs_base = 0 & 0xFFFF0000UL;	regs.vcpu_regs.rip = 0 & 0xFFFFUL; 	ret = ioctl(hsm_fd, ACRN_IOCTL_SET_VCPU_REGS, &regs);	printf("Set up VM BSP registers! [%d]\n", ret); 	/* create an ioreq client for this VM */	ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_IOREQ_CLIENT, 0);	printf("Created IO request client! [%d]\n", ret); 	/* run vm */	ret = ioctl(hsm_fd, ACRN_IOCTL_START_VM, vmid);	printf("Start VM! [%d]\n", ret); 	signal(SIGINT, vm_exit);	while (is_running) {		ret = ioctl(hsm_fd, ACRN_IOCTL_ATTACH_IOREQ_CLIENT, 0); 		for (vcpu_id = 0; vcpu_id < vcpu_num; vcpu_id++) {			io_req = &io_req_buf[vcpu_id];			if ((__sync_add_and_fetch(&io_req->processed, 0) == ACRN_IOREQ_STATE_PROCESSING)					&& (!io_req->kernel_handled))				if (io_req->type == ACRN_IOREQ_TYPE_PORTIO) {					int bytes, port, in; 					port = io_req->reqs.pio_request.address;					bytes = io_req->reqs.pio_request.size;					in = (io_req->reqs.pio_request.direction == ACRN_IOREQ_DIR_READ);					printf("Guest VM %s PIO[%x] with size[%x]\n", in ? "read" : "write", port, bytes); 					notify.vmid = vmid;					notify.vcpu = vcpu_id;					ioctl(hsm_fd, ACRN_IOCTL_NOTIFY_REQUEST_FINISH, &notify);				}		}	} 	ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL);	printf("Destroy VM! [%d]\n", ret);	close(hsm_fd);	free(guest_memory);	return 0;}