Add x86_64 kernel bring-up with build-selected platform adapters

virtualbox-wrapper.ps1

@@ -10,7 +10,10 @@ You need a local git-ignored localenv.json file with the following content:
 param (
   [Parameter(Mandatory=$true)]
   [ValidateSet('up', 'down')]
-  [String]$Command
+  [String]$Command,
+  # Optional modes for bounded, script-driven boot validation (Aaron Hance).
+  [switch]$Headless,
+  [switch]$NoMonitor
 )
 
 $Config = Get-Content .\localenv.json | ConvertFrom-Json
@@ -24,10 +27,23 @@ if ($Command -eq 'up') {
     Clear-Content $LogLocation
   }
 
-  $MonitorJob = Start-Job -ArgumentList $MachineName -ScriptBlock {
-    param($MachineName)
+  if ($NoMonitor) {
+    if ($Headless) {
+      VBoxManage.exe startvm $MachineName --type headless
+    } else {
+      VBoxManage.exe startvm $MachineName
+    }
+    exit $LASTEXITCODE
+  }
+
+  $MonitorJob = Start-Job -ArgumentList $MachineName, $Headless.IsPresent -ScriptBlock {
+    param($MachineName, $Headless)
     Write-Output "Starting $MachineName"
-    VBoxManage.exe startvm $MachineName
+    if ($Headless) {
+      VBoxManage.exe startvm $MachineName --type headless
+    } else {
+      VBoxManage.exe startvm $MachineName
+    }
     $running=$true
     while($running) {
       $status=(VBoxManage.exe list runningvms)
@@ -56,4 +72,4 @@ if ($Command -eq 'up') {
 } elseif ($Command -eq 'down') {
   Write-Output "Stopping $MachineName"
   VBoxManage.exe controlvm $MachineName poweroff
-}
+}