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)
 24void *guest_memory;
 25
 26extern const unsigned char guest16[], guest16_end[];
 27static char io_request_page[4096] __attribute__((aligned(4096)));
 28static 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 */
 33guid_t vm_uuid = GUID_INIT(0x385479d2, 0xd625, 0xe811, 0x86, 0x4e, 0xcb, 0x7a, 0x18, 0xb3, 0x46, 0x43);
 34
 35int hsm_fd;
 36int is_running = 1;
 37
 38void 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
 47int 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(&regs, 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, &regs);
 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, &notify);
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}