hypervisor: Add MSHV implementation of VcpuInit

Extend the VcpuInit interface to accomodate changes for MSHV on aarch64.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>

hypervisor/src/lib.rs

@@ -200,6 +200,8 @@ pub enum IrqRoutingEntry {
 pub enum VcpuInit {
     #[cfg(all(feature = "kvm", target_arch = "aarch64"))]
     Kvm(kvm_bindings::kvm_vcpu_init),
+    #[cfg(all(feature = "mshv", target_arch = "aarch64"))]
+    Mshv(mshv_bindings::MshvVcpuInit),
 }
 
 #[derive(Debug, Clone, PartialEq)]

hypervisor/src/mshv/mod.rs

@@ -210,6 +210,25 @@ impl From<crate::RegList> for mshv_bindings::MshvRegList {
     }
 }
 
+#[cfg(target_arch = "aarch64")]
+impl From<mshv_bindings::MshvVcpuInit> for crate::VcpuInit {
+    fn from(s: mshv_bindings::MshvVcpuInit) -> Self {
+        crate::VcpuInit::Mshv(s)
+    }
+}
+
+#[cfg(target_arch = "aarch64")]
+impl From<crate::VcpuInit> for mshv_bindings::MshvVcpuInit {
+    fn from(e: crate::VcpuInit) -> Self {
+        match e {
+            crate::VcpuInit::Mshv(e) => e,
+            /* Needed in case other hypervisors are enabled */
+            #[allow(unreachable_patterns)]
+            _ => panic!("VcpuInit is not valid"),
+        }
+    }
+}
+
 struct MshvDirtyLogSlot {
     guest_pfn: u64,
     memory_size: u64,