tests: add some virtio-gpu & vhost-user-gpu acceptance test

This will check virtio/vhost-user-vga & virgl are correctly initialized
by the Linux kernel on an egl-headless display.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20210204105232.834642-21-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

tests/acceptance/virtio-gpu.py

@@ -0,0 +1,161 @@
+# 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 avocado_qemu import Test
+from avocado_qemu import BUILD_DIR
+from avocado_qemu import wait_for_console_pattern
+from avocado_qemu import exec_command_and_wait_for_pattern
+from avocado_qemu import is_readable_executable_file
+
+from qemu.accel import kvm_available
+
+import os
+import socket
+import subprocess
+
+
+ACCEL_NOT_AVAILABLE_FMT = "%s accelerator does not seem to be available"
+KVM_NOT_AVAILABLE = ACCEL_NOT_AVAILABLE_FMT % "KVM"
+
+
+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(Test):
+    """
+    :avocado: tags=virtio-gpu
+    """
+
+    KERNEL_COMMON_COMMAND_LINE = "printk.time=0 "
+    KERNEL_URL = (
+        "https://archives.fedoraproject.org/pub/fedora"
+        "/linux/releases/33/Everything/x86_64/os/images"
+        "/pxeboot/vmlinuz"
+    )
+    INITRD_URL = (
+        "https://archives.fedoraproject.org/pub/fedora"
+        "/linux/releases/33/Everything/x86_64/os/images"
+        "/pxeboot/initrd.img"
+    )
+
+    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):
+        """
+        :avocado: tags=arch:x86_64
+        :avocado: tags=device:virtio-vga
+        """
+        kernel_command_line = (
+            self.KERNEL_COMMON_COMMAND_LINE + "console=ttyS0 rdinit=/bin/bash"
+        )
+        # FIXME: should check presence of virtio, virgl etc
+        if not kvm_available(self.arch, self.qemu_bin):
+            self.cancel(KVM_NOT_AVAILABLE)
+
+        kernel_path = self.fetch_asset(self.KERNEL_URL)
+        initrd_path = self.fetch_asset(self.INITRD_URL)
+
+        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,virgl=on")
+        self.vm.add_args("-display", "egl-headless")
+        self.vm.add_args(
+            "-kernel",
+            kernel_path,
+            "-initrd",
+            initrd_path,
+            "-append",
+            kernel_command_line,
+        )
+        self.vm.launch()
+        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):
+        """
+        :avocado: tags=arch:x86_64
+        :avocado: tags=device:vhost-user-vga
+        """
+        kernel_command_line = (
+            self.KERNEL_COMMON_COMMAND_LINE + "console=ttyS0 rdinit=/bin/bash"
+        )
+        # FIXME: should check presence of vhost-user-gpu, virgl, memfd etc
+        if not kvm_available(self.arch, self.qemu_bin):
+            self.cancel(KVM_NOT_AVAILABLE)
+
+        vug = pick_default_vug_bin()
+        if not vug:
+            self.cancel("Could not find vhost-user-gpu")
+
+        kernel_path = self.fetch_asset(self.KERNEL_URL)
+        initrd_path = self.fetch_asset(self.INITRD_URL)
+
+        # 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.vm._test_dir, "vhost-user-gpu.log"
+        )
+        self._vug_log_file = open(self._vug_log_path, "wb")
+        print(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",
+            kernel_command_line,
+        )
+        self.vm.launch()
+        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")
+        self.vm.shutdown()
+        qemu_sock.close()
+        vugp.terminate()
+        vugp.wait()