vmm, arch: Move CPU identification handling to shared CPUID code

Move the code for populating the CPUID with details of the CPU
identification from the per-vCPU CPUID handling code to the shared CPUID
handling code.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

arch/src/x86_64/mod.rs

@@ -393,22 +393,6 @@ pub fn configure_vcpu(
         }
     }
 
-    // Copy CPU identification string
-    for i in 0x8000_0002..=0x8000_0004 {
-        cpuid.retain(|c| c.function != i);
-        let leaf = unsafe { x86_64::__cpuid(i) };
-        cpuid
-            .push(CpuIdEntry {
-                function: i,
-                eax: leaf.eax,
-                ebx: leaf.ebx,
-                ecx: leaf.ecx,
-                edx: leaf.edx,
-                ..Default::default()
-            })
-            .map_err(|_| Error::PopulatingCpuid)?;
-    }
-
     fd.set_cpuid2(&cpuid)
         .map_err(|e| Error::SetSupportedCpusFailed(e.into()))?;
 

vmm/src/cpu.rs

@@ -31,9 +31,9 @@ use arch::EntryPoint;
 use devices::interrupt_controller::InterruptController;
 #[cfg(target_arch = "aarch64")]
 use hypervisor::kvm::kvm_bindings;
-#[cfg(target_arch = "x86_64")]
-use hypervisor::CpuId;
 use hypervisor::{vm::VmmOps, CpuState, HypervisorCpuError, VmExit};
+#[cfg(target_arch = "x86_64")]
+use hypervisor::{CpuId, CpuIdEntry};
 use libc::{c_void, siginfo_t};
 use seccomp::{SeccompAction, SeccompFilter};
 use std::os::unix::thread::JoinHandleExt;
@@ -667,6 +667,22 @@ impl CpuManager {
             }
         }
 
+        // Copy CPU identification string
+        for i in 0x8000_0002..=0x8000_0004 {
+            cpuid.retain(|c| c.function != i);
+            let leaf = unsafe { std::arch::x86_64::__cpuid(i) };
+            cpuid
+                .push(CpuIdEntry {
+                    function: i,
+                    eax: leaf.eax,
+                    ebx: leaf.ebx,
+                    ecx: leaf.ecx,
+                    edx: leaf.edx,
+                    ..Default::default()
+                })
+                .unwrap();
+        }
+
         Ok(cpuid)
     }