tests/avocado: Add igb test

This automates ethtool tests for igb registers, interrupts, etc.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

tests/avocado/igb.py

@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# ethtool tests for igb registers, interrupts, etc
+
+from avocado_qemu import LinuxTest
+
+class IGB(LinuxTest):
+    """
+    :avocado: tags=accel:kvm
+    :avocado: tags=arch:x86_64
+    :avocado: tags=distro:fedora
+    :avocado: tags=distro_version:31
+    :avocado: tags=machine:q35
+    """
+
+    timeout = 180
+
+    def test(self):
+        self.require_accelerator('kvm')
+        kernel_url = self.distro.pxeboot_url + 'vmlinuz'
+        kernel_hash = '5b6f6876e1b5bda314f93893271da0d5777b1f3c'
+        kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
+        initrd_url = self.distro.pxeboot_url + 'initrd.img'
+        initrd_hash = 'dd0340a1b39bd28f88532babd4581c67649ec5b1'
+        initrd_path = self.fetch_asset(initrd_url, asset_hash=initrd_hash)
+
+        # Ideally we want to test MSI as well, but it is blocked by a bug
+        # fixed with:
+        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=28e96556baca7056d11d9fb3cdd0aba4483e00d8
+        kernel_params = self.distro.default_kernel_params + ' pci=nomsi'
+
+        self.vm.add_args('-kernel', kernel_path,
+                         '-initrd', initrd_path,
+                         '-append', kernel_params,
+                         '-accel', 'kvm',
+                         '-device', 'igb')
+        self.launch_and_wait()
+        self.ssh_command('dnf -y install ethtool')
+        self.ssh_command('ethtool -t eth1 offline')