vng: support --nvgpu and --qemu-opts

When passing arguments to virtme-run, --qemu-opts has to be the last
one, because it will take all args set after that.

In other words, --nvgpu was not supposed to be passed after --qemu-opts.

While at it, re-order functions and add a comment to avoid re-doing the
same mistake.

Note that an alternative would be to call virtme-run with --qemu-opt
instead of --qemu-opts (with 's'). But a comment should be enough.

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

virtme_ng/run.py

@@ -1200,6 +1200,12 @@ def _get_virtme_cpus(self, args):
             cpus = args.cpus
         self.virtme_param["cpus"] = f"--cpus {cpus}"
 
+    def _get_virtme_nvgpu(self, args):
+        if args.nvgpu is not None:
+            self.virtme_param["nvgpu"] = f"--nvgpu 'vfio-pci,host={args.nvgpu}'"
+        else:
+            self.virtme_param["nvgpu"] = ""
+
     def _get_virtme_qemu_opts(self, args):
         qemu_args = ""
         if args.qemu_opts is not None:
@@ -1214,12 +1220,6 @@ def _get_virtme_qemu_opts(self, args):
         else:
             self.virtme_param["qemu_opts"] = ""
 
-    def _get_virtme_nvgpu(self, args):
-        if args.nvgpu is not None:
-            self.virtme_param["nvgpu"] = f"--nvgpu 'vfio-pci,host={args.nvgpu}'"
-        else:
-            self.virtme_param["nvgpu"] = ""
-
     def run(self, args):
         """Execute a kernel inside virtme-ng."""
         self._get_virtme_name(args)
@@ -1260,9 +1260,9 @@ def run(self, args):
         self._get_virtme_gdb(args)
         self._get_virtme_snaps(args)
         self._get_virtme_busybox(args)
+        self._get_virtme_nvgpu(args)
         self._get_virtme_qemu(args)
         self._get_virtme_qemu_opts(args)
-        self._get_virtme_nvgpu(args)
 
         # Start VM using virtme-run
         cmd = (
@@ -1305,9 +1305,10 @@ def run(self, args):
             + f'{self.virtme_param["gdb"]} '
             + f'{self.virtme_param["snaps"]} '
             + f'{self.virtme_param["busybox"]} '
+            + f'{self.virtme_param["nvgpu"]} '
             + f'{self.virtme_param["qemu"]} '
             + f'{self.virtme_param["qemu_opts"]} '
-            + f'{self.virtme_param["nvgpu"]} '
+            # Important: qemu_opts has to be the last one
         )
         check_call(cmd, shell=True)