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vmm: cpu: Track all Vcpus through CpuManager
In anticipation for the CpuManager to aggregate all Vcpu snapshots together, this change makes sure the CpuManager has a handle onto every vCPU. Signed-off-by: Cathy Zhang <cathy.zhang@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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@ -265,17 +265,17 @@ impl Vcpu {
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mmio_bus: Arc<devices::Bus>,
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ioapic: Option<Arc<Mutex<ioapic::Ioapic>>>,
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creation_ts: std::time::Instant,
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) -> Result<Self> {
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) -> Result<Arc<Mutex<Self>>> {
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let kvm_vcpu = fd.create_vcpu(id).map_err(Error::VcpuFd)?;
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// Initially the cpuid per vCPU is the one supported by this VM.
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Ok(Vcpu {
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Ok(Arc::new(Mutex::new(Vcpu {
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fd: kvm_vcpu,
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id,
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io_bus,
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mmio_bus,
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ioapic,
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vm_ts: creation_ts,
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})
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})))
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}
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/// Configures a x86_64 specific vcpu and should be called once per vcpu from the vcpu's thread.
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@ -400,6 +400,7 @@ pub struct CpuManager {
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reset_evt: EventFd,
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vcpu_states: Vec<VcpuState>,
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selected_cpu: u8,
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vcpus: Vec<Arc<Mutex<Vcpu>>>,
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}
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const CPU_ENABLE_FLAG: usize = 0;
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@ -535,6 +536,7 @@ impl CpuManager {
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vcpu_states,
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reset_evt,
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selected_cpu: 0,
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vcpus: Vec::with_capacity(usize::from(config.max_vcpus)),
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}));
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device_manager
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@ -606,7 +608,7 @@ impl CpuManager {
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None
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};
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let mut vcpu = Vcpu::new(
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let vcpu = Vcpu::new(
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cpu_id,
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&self.fd,
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self.io_bus.clone(),
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@ -623,26 +625,30 @@ impl CpuManager {
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let vcpu_kill = self.vcpu_states[usize::from(cpu_id)].kill.clone();
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let vm_memory = self.vm_memory.clone();
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let cpuid = self.cpuid.clone();
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vcpu.lock()
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.unwrap()
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.configure(entry_point, &vm_memory, self.cpuid.clone())
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.expect("Failed to configure vCPU");
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let vcpu_clone = Arc::clone(&vcpu);
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self.vcpus.push(vcpu_clone);
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let handle = Some(
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thread::Builder::new()
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.name(format!("vcpu{}", vcpu.id))
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.name(format!("vcpu{}", cpu_id))
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.spawn(move || {
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extern "C" fn handle_signal(_: i32, _: *mut siginfo_t, _: *mut c_void) {}
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// This uses an async signal safe handler to kill the vcpu handles.
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register_signal_handler(SIGRTMIN(), handle_signal)
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.expect("Failed to register vcpu signal handler");
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vcpu.configure(entry_point, &vm_memory, cpuid)
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.expect("Failed to configure vCPU");
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// Block until all CPUs are ready.
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vcpu_thread_barrier.wait();
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loop {
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// vcpu.run() returns false on a KVM_EXIT_SHUTDOWN (triple-fault) so trigger a reset
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match vcpu.run() {
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match vcpu.lock().unwrap().run() {
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Err(e) => {
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error!("VCPU generated error: {:?}", e);
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break;
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