use std::fs; use std::io; use std::os::unix::io::FromRawFd; use crate::vcpu::Vcpu; use crate::{ioctl, kvm_sys, KvmRun, PhysAddr, UserMem}; pub struct Vm { vm: fs::File, vcpu_mmap_size: usize, } impl Vm { pub(crate) fn new(vm: fs::File, vcpu_mmap_size: usize) -> Vm { Vm { vm, vcpu_mmap_size } } pub unsafe fn set_user_memory_region( &self, phys_addr: PhysAddr, mem: &UserMem, ) -> io::Result<()> { // Create guest physical memory mapping for `slot : 0` at guest `phys addr : 0`. let mut kvm_mem = kvm_sys::kvm_userspace_memory_region::default(); kvm_mem.userspace_addr = mem.ptr as u64; kvm_mem.memory_size = mem.len as u64; kvm_mem.guest_phys_addr = phys_addr.0; ioctl( &self.vm, kvm_sys::KVM_SET_USER_MEMORY_REGION, &kvm_mem as *const _ as u64, ) .map(|_| ()) } pub fn create_vpcu(&self, id: u64) -> io::Result { let vcpu = ioctl(&self.vm, kvm_sys::KVM_CREATE_VCPU, id) .map(|fd| unsafe { fs::File::from_raw_fd(fd) })?; let kvm_run = KvmRun::new(&vcpu, self.vcpu_mmap_size)?; Ok(Vcpu::new(vcpu, kvm_run)) } }