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// 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(®s, 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, ®s);
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, ¬ify);
}
}
}
ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL);
printf("Destroy VM! [%d]\n", ret);
close(hsm_fd);
free(guest_memory);
return 0;
}
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