vmm: Store and restore virtio-mmio resources

Based on the device tree, retrieve the resources associated with a
virtio-mmio device to restore it at the right location in guest address
space. Also, the IRQ number is correctly restored.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

vm-device/src/lib.rs

@@ -10,7 +10,7 @@ use vm_memory::{
 };
 
 /// Type of Message Singaled Interrupt
-#[derive(Copy, Clone, PartialEq, Serialize, Deserialize)]
+#[derive(Copy, Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub enum MsiIrqType {
     /// PCI MSI IRQ numbers.
     PciMsi,
@@ -22,7 +22,7 @@ pub enum MsiIrqType {
 
 /// Enumeration for device resources.
 #[allow(missing_docs)]
-#[derive(Clone, Serialize, Deserialize)]
+#[derive(Clone, Debug, Serialize, Deserialize)]
 pub enum Resource {
     /// IO Port address range.
     PioAddressRange { base: u16, size: u16 },