134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* A sample program to run a User VM on the ACRN hypervisor
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*
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* This sample runs in a Service VM, which is a privileged VM of ACRN.
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* CONFIG_ACRN_HSM need to be enabled in the Service VM.
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*
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* Guest VM code in guest16.s will be executed after the VM launched.
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*
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* Copyright (C) 2020 Intel Corporation. All rights reserved.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <malloc.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/ioctl.h>
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#include <linux/acrn.h>
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#define GUEST_MEMORY_SIZE (1024*1024)
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void *guest_memory;
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extern const unsigned char guest16[], guest16_end[];
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static char io_request_page[4096] __attribute__((aligned(4096)));
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static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page;
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__u16 vcpu_num;
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__u16 vmid;
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int hsm_fd;
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int is_running = 1;
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void vm_exit(int sig)
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{
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sig = sig;
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is_running = 0;
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ioctl(hsm_fd, ACRN_IOCTL_PAUSE_VM, vmid);
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ioctl(hsm_fd, ACRN_IOCTL_DESTROY_IOREQ_CLIENT, 0);
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}
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int main(int argc, char **argv)
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{
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int vcpu_id, ret;
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struct acrn_vm_creation create_vm = {0};
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struct acrn_vm_memmap ram_map = {0};
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struct acrn_vcpu_regs regs;
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struct acrn_io_request *io_req;
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struct acrn_ioreq_notify __attribute__((aligned(8))) notify;
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argc = argc;
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argv = argv;
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guest_memory = memalign(4096, GUEST_MEMORY_SIZE);
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if (!guest_memory) {
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printf("No enough memory!\n");
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return -1;
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}
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hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC);
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create_vm.ioreq_buf = (__u64)io_req_buf;
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ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm);
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printf("Created VM! [%d]\n", ret);
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vcpu_num = create_vm.vcpu_num;
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vmid = create_vm.vmid;
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/* setup guest memory */
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ram_map.type = ACRN_MEMMAP_RAM;
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ram_map.vma_base = (__u64)guest_memory;
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ram_map.len = GUEST_MEMORY_SIZE;
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ram_map.user_vm_pa = 0;
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ram_map.attr = ACRN_MEM_ACCESS_RWX;
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ret = ioctl(hsm_fd, ACRN_IOCTL_SET_MEMSEG, &ram_map);
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printf("Set up VM memory! [%d]\n", ret);
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memcpy(guest_memory, guest16, guest16_end-guest16);
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/* setup vcpu registers */
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memset(®s, 0, sizeof(regs));
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regs.vcpu_id = 0;
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regs.vcpu_regs.rip = 0;
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/* CR0_ET | CR0_NE */
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regs.vcpu_regs.cr0 = 0x30U;
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regs.vcpu_regs.cs_ar = 0x009FU;
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regs.vcpu_regs.cs_sel = 0xF000U;
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regs.vcpu_regs.cs_limit = 0xFFFFU;
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regs.vcpu_regs.cs_base = 0 & 0xFFFF0000UL;
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regs.vcpu_regs.rip = 0 & 0xFFFFUL;
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ret = ioctl(hsm_fd, ACRN_IOCTL_SET_VCPU_REGS, ®s);
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printf("Set up VM BSP registers! [%d]\n", ret);
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/* create an ioreq client for this VM */
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ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_IOREQ_CLIENT, 0);
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printf("Created IO request client! [%d]\n", ret);
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/* run vm */
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ret = ioctl(hsm_fd, ACRN_IOCTL_START_VM, vmid);
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printf("Start VM! [%d]\n", ret);
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signal(SIGINT, vm_exit);
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while (is_running) {
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ret = ioctl(hsm_fd, ACRN_IOCTL_ATTACH_IOREQ_CLIENT, 0);
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for (vcpu_id = 0; vcpu_id < vcpu_num; vcpu_id++) {
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io_req = &io_req_buf[vcpu_id];
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if ((__sync_add_and_fetch(&io_req->processed, 0) == ACRN_IOREQ_STATE_PROCESSING)
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&& (!io_req->kernel_handled))
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if (io_req->type == ACRN_IOREQ_TYPE_PORTIO) {
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int bytes, port, in;
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port = io_req->reqs.pio_request.address;
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bytes = io_req->reqs.pio_request.size;
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in = (io_req->reqs.pio_request.direction == ACRN_IOREQ_DIR_READ);
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printf("Guest VM %s PIO[%x] with size[%x]\n", in ? "read" : "write", port, bytes);
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notify.vmid = vmid;
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notify.vcpu = vcpu_id;
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ioctl(hsm_fd, ACRN_IOCTL_NOTIFY_REQUEST_FINISH, ¬ify);
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}
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}
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}
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ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL);
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printf("Destroy VM! [%d]\n", ret);
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close(hsm_fd);
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free(guest_memory);
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return 0;
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}
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