pvh: Write start_info structure to guest memory

Fill the hvm_start_info and related memory map structures as
specified in the PVH boot protocol. Write the data structures
to guest memory at the GPA that will be stored in %rbx when
the guest starts.

Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>

vmm/src/vm.rs

@@ -446,6 +446,7 @@ impl Vm {
                     boot_vcpus,
                     Some(hdr),
                     rsdp_addr,
+                    BootProtocol::LinuxBoot,
                 )
                 .map_err(Error::ConfigureSystem)?;
 
@@ -480,6 +481,7 @@ impl Vm {
                     boot_vcpus,
                     None,
                     rsdp_addr,
+                    boot_prot,
                 )
                 .map_err(Error::ConfigureSystem)?;