tests: set the machine id to 0 for the sharded tests

Signed-off-by: Reto Achermann <[email protected]>

Author: achreto

kernel/testutils/src/rackscale_runner.rs

@@ -483,6 +483,7 @@ impl<T: Clone + Send + 'static> RackscaleRun<T> {
                             .memory(state.memory)
                             .nobuild() // Use single build for all for consistency
                             .cmd(&client_cmd)
+                            .machine_id(0) // always hardcoded to 0 for the sharded case
                             .nodes(1)
                             .node_offset(client_placement_cores[i + 1].0)
                             .setaffinity(client_placement_cores[i + 1].1.clone());

kernel/testutils/src/runner_args.rs

@@ -59,6 +59,8 @@ pub struct RunnerArgs<'a> {
     nobuild: bool,
     /// Parameters to add to the QEMU command line
     qemu_args: Vec<&'a str>,
+    /// the machine id to set
+    machine_id: Option<usize>,
     /// Timeout in ms
     pub timeout: Option<u64>,
     /// Default network interface for QEMU
@@ -119,6 +121,7 @@ impl<'a> RunnerArgs<'a> {
             no_network_setup: false,
             mode: None,
             transport: None,
+            machine_id: None,
         };
 
         if cfg!(feature = "prealloc") {
@@ -156,6 +159,7 @@ impl<'a> RunnerArgs<'a> {
             no_network_setup: false,
             mode: None,
             transport: None,
+            machine_id: None,
         };
 
         if cfg!(feature = "prealloc") {
@@ -283,6 +287,11 @@ impl<'a> RunnerArgs<'a> {
         self
     }
 
+    pub fn machine_id(mut self, id: usize) -> RunnerArgs<'a> {
+        self.machine_id = Some(id);
+        self
+    }
+
     pub fn shmem_size(mut self, sizes: Vec<usize>) -> RunnerArgs<'a> {
         self.shmem_sizes = sizes;
         self
@@ -456,6 +465,10 @@ impl<'a> RunnerArgs<'a> {
             cmd.push(String::from("--kgdb"));
         }
 
+        if let Some(mid) = self.machine_id {
+            cmd.push(format!("--mid={mid}"));
+        }
+
         // Don't run qemu, just build?
         if self.norun {
             cmd.push(String::from("--norun"));