tests/functional: Convert the virtio_gpu avocado test into a standalone test

Nothing thrilling in here, it's just a straight forward conversion.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240830133841.142644-25-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/functional/test_virtio_gpu.py

@@ -0,0 +1,151 @@
+#!/usr/bin/env python3
+#
+# virtio-gpu tests
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+
+from qemu_test import BUILD_DIR
+from qemu_test import QemuSystemTest, Asset
+from qemu_test import wait_for_console_pattern
+from qemu_test import exec_command_and_wait_for_pattern
+from qemu_test import is_readable_executable_file
+
+from qemu.utils import kvm_available
+
+import os
+import socket
+import subprocess
+
+
+def pick_default_vug_bin():
+    relative_path = "./contrib/vhost-user-gpu/vhost-user-gpu"
+    if is_readable_executable_file(relative_path):
+        return relative_path
+
+    bld_dir_path = os.path.join(BUILD_DIR, relative_path)
+    if is_readable_executable_file(bld_dir_path):
+        return bld_dir_path
+
+
+class VirtioGPUx86(QemuSystemTest):
+
+    KERNEL_COMMAND_LINE = "printk.time=0 console=ttyS0 rdinit=/bin/bash"
+    ASSET_KERNEL = Asset(
+        ("https://archives.fedoraproject.org/pub/archive/fedora"
+         "/linux/releases/33/Everything/x86_64/os/images"
+         "/pxeboot/vmlinuz"),
+        '2dc5fb5cfe9ac278fa45640f3602d9b7a08cc189ed63fd9b162b07073e4df397')
+    ASSET_INITRD = Asset(
+        ("https://archives.fedoraproject.org/pub/archive/fedora"
+         "/linux/releases/33/Everything/x86_64/os/images"
+         "/pxeboot/initrd.img"),
+        'c49b97f893a5349e4883452178763e402bdc5caa8845b226a2d1329b5f356045')
+
+    def wait_for_console_pattern(self, success_message, vm=None):
+        wait_for_console_pattern(
+            self,
+            success_message,
+            failure_message="Kernel panic - not syncing",
+            vm=vm,
+        )
+
+    def test_virtio_vga_virgl(self):
+        # FIXME: should check presence of virtio, virgl etc
+        self.require_accelerator('kvm')
+
+        kernel_path = self.ASSET_KERNEL.fetch()
+        initrd_path = self.ASSET_INITRD.fetch()
+
+        self.vm.set_console()
+        self.vm.add_args("-cpu", "host")
+        self.vm.add_args("-m", "2G")
+        self.vm.add_args("-machine", "pc,accel=kvm")
+        self.vm.add_args("-device", "virtio-vga-gl")
+        self.vm.add_args("-display", "egl-headless")
+        self.vm.add_args(
+            "-kernel",
+            kernel_path,
+            "-initrd",
+            initrd_path,
+            "-append",
+            self.KERNEL_COMMAND_LINE,
+        )
+        try:
+            self.vm.launch()
+        except:
+            # TODO: probably fails because we are missing the VirGL features
+            self.skipTest("VirGL not enabled?")
+
+        self.wait_for_console_pattern("as init process")
+        exec_command_and_wait_for_pattern(
+            self, "/usr/sbin/modprobe virtio_gpu", ""
+        )
+        self.wait_for_console_pattern("features: +virgl +edid")
+
+    def test_vhost_user_vga_virgl(self):
+        # FIXME: should check presence of vhost-user-gpu, virgl, memfd etc
+        self.require_accelerator('kvm')
+
+        vug = pick_default_vug_bin()
+        if not vug:
+            self.skipTest("Could not find vhost-user-gpu")
+
+        kernel_path = self.ASSET_KERNEL.fetch()
+        initrd_path = self.ASSET_INITRD.fetch()
+
+        # Create socketpair to connect proxy and remote processes
+        qemu_sock, vug_sock = socket.socketpair(
+            socket.AF_UNIX, socket.SOCK_STREAM
+        )
+        os.set_inheritable(qemu_sock.fileno(), True)
+        os.set_inheritable(vug_sock.fileno(), True)
+
+        self._vug_log_path = os.path.join(
+            self.logdir, "vhost-user-gpu.log"
+        )
+        self._vug_log_file = open(self._vug_log_path, "wb")
+        self.log.info('Complete vhost-user-gpu.log file can be '
+                      'found at %s', self._vug_log_path)
+
+        vugp = subprocess.Popen(
+            [vug, "--virgl", "--fd=%d" % vug_sock.fileno()],
+            stdin=subprocess.DEVNULL,
+            stdout=self._vug_log_file,
+            stderr=subprocess.STDOUT,
+            shell=False,
+            close_fds=False,
+        )
+
+        self.vm.set_console()
+        self.vm.add_args("-cpu", "host")
+        self.vm.add_args("-m", "2G")
+        self.vm.add_args("-object", "memory-backend-memfd,id=mem,size=2G")
+        self.vm.add_args("-machine", "pc,memory-backend=mem,accel=kvm")
+        self.vm.add_args("-chardev", "socket,id=vug,fd=%d" % qemu_sock.fileno())
+        self.vm.add_args("-device", "vhost-user-vga,chardev=vug")
+        self.vm.add_args("-display", "egl-headless")
+        self.vm.add_args(
+            "-kernel",
+            kernel_path,
+            "-initrd",
+            initrd_path,
+            "-append",
+            self.KERNEL_COMMAND_LINE,
+        )
+        try:
+            self.vm.launch()
+        except:
+            # TODO: probably fails because we are missing the VirGL features
+            self.skipTest("VirGL not enabled?")
+        self.wait_for_console_pattern("as init process")
+        exec_command_and_wait_for_pattern(self, "/usr/sbin/modprobe virtio_gpu",
+                                          "features: +virgl +edid")
+        self.vm.shutdown()
+        qemu_sock.close()
+        vugp.terminate()
+        vugp.wait()
+
+if __name__ == '__main__':
+    QemuSystemTest.main()