* Pass -cpu kvm64 in NixOS VMs (and add a simple regression test for

GMP).

svn path=/nixos/trunk/; revision=33849

lib/test-driver/Machine.pm

@@ -27,7 +27,7 @@ sub new {
     if (!$startCommand) {
         # !!! merge with qemu-vm.nix.
         $startCommand =
-            "qemu-system-x86_64 -m 384 " .
+            "qemu-kvm -m 384 " .
             "-net nic,model=virtio \$QEMU_OPTS ";
         $startCommand .= "-drive file=" . Cwd::abs_path($args->{hda}) . ",if=virtio,boot=on,werror=report "
             if defined $args->{hda};

modules/virtualisation/qemu-vm.nix

@@ -158,9 +158,10 @@ let
       ${pkgs.vmTools.startSamba}
 
       # Start QEMU.
-      exec ${pkgs.qemu_kvm}/bin/qemu-system-x86_64 \
+      exec ${pkgs.qemu_kvm}/bin/qemu-kvm \
           -name ${vmName} \
           -m ${toString config.virtualisation.memorySize} \
+          ${optionalString (pkgs.stdenv.system == "x86_64-linux") "-cpu kvm64"} \
           -net nic,vlan=0,model=virtio \
           -chardev socket,id=samba,path=./samba \
           -net user,vlan=0,guestfwd=tcp:10.0.2.4:445-chardev:samba''${QEMU_NET_OPTS:+,$QEMU_NET_OPTS} \

release.nix

@@ -216,6 +216,7 @@ let
         ipv6 = t.ipv6.test;
         kde4 = t.kde4.test;
         login = t.login.test;
+        misc = t.misc.test;
         mpich = t.mpich.test;
         mysql = t.mysql.test;
         mysql_replication = t.mysql_replication.test;

tests/default.nix

@@ -11,6 +11,7 @@ with import ../lib/testing.nix { inherit system; };
   ipv6 = makeTest (import ./ipv6.nix);
   kde4 = makeTest (import ./kde4.nix);
   login = makeTest (import ./login.nix);
+  misc = makeTest (import ./misc.nix);
   mpich = makeTest (import ./mpich.nix);
   mysql = makeTest (import ./mysql.nix);
   mysql_replication = makeTest (import ./mysql-replication.nix);

tests/misc.nix

@@ -0,0 +1,21 @@
+# Miscellaneous small tests that don't warrant their own VM run.
+
+{ pkgs, ... }:
+
+{
+
+  machine = { config, pkgs, ... }: { };
+
+  testScript =
+    ''
+      subtest "nixos-version", sub {
+          $machine->succeed("[ `nixos-version | wc -w` = 1 ]");
+      };
+
+      # Regression test for GMP aborts on QEMU.
+      subtest "gmp", sub {
+          $machine->succeed("expr 1 + 2");
+      };
+    '';
+
+}