vmm: Set vCPU MSR config updates when creating vCPUs

Vcpus need to be configured according to the selected CPU profile.
We thus store the computed vCPU MSR config update in the CPU manager
and use it whenever a vCPU is created.

Signed-off-by: Oliver Anderson <oliver.anderson@cyberus-technology.de>
On-behalf-of: SAP oliver.anderson@sap.com

vmm/src/cpu.rs

@@ -234,6 +234,9 @@ pub enum Error {
 
     #[error("Error enabling core scheduling")]
     CoreScheduling(#[source] io::Error),
+
+    #[error("Error generating MSR configuration update")]
+    MsrConfigurationUpdate(#[source] arch::Error),
 }
 pub type Result<T> = result::Result<T, Error>;
 
@@ -709,6 +712,8 @@ pub struct CpuManager {
     interrupt_controller: Option<Arc<Mutex<dyn InterruptController>>>,
     #[cfg(target_arch = "x86_64")]
     cpuid: Vec<CpuIdEntry>,
+    #[cfg(target_arch = "x86_64")]
+    msr_config_update: Option<VcpuMsrConfigUpdate>,
     #[cfg_attr(target_arch = "aarch64", allow(dead_code))]
     vm: Arc<dyn hypervisor::Vm>,
     vcpus_kill_signalled: Arc<AtomicBool>,
@@ -932,11 +937,22 @@ impl CpuManager {
             .map_err(Error::CommonCpuId)?
         };
 
+        #[cfg(target_arch = "x86_64")]
+        let msr_config_update = arch::x86_64::generate_required_msr_updates(
+            hypervisor.as_ref(),
+            config.profile,
+            config.kvm_hyperv,
+            config.nested,
+        )
+        .map_err(Error::MsrConfigurationUpdate)?;
+
         Ok(Arc::new(Mutex::new(CpuManager {
             config: config.clone(),
             interrupt_controller: None,
             #[cfg(target_arch = "x86_64")]
             cpuid,
+            #[cfg(target_arch = "x86_64")]
+            msr_config_update,
             vm,
             vcpus_kill_signalled: Arc::new(AtomicBool::new(false)),
             vcpus_pause_signalled: Arc::new(AtomicBool::new(false)),
@@ -986,7 +1002,7 @@ impl CpuManager {
             #[cfg(target_arch = "x86_64")]
             self.hypervisor.get_cpu_vendor(),
             #[cfg(target_arch = "x86_64")]
-            Default::default(),
+            self.msr_config_update.clone(),
         )?;
 
         if let Some(snapshot) = snapshot {