xref: /openbmc/qemu/tests/avocado/kvm_xen_guest.py (revision 2e1cacfb) 
1# KVM Xen guest functional tests
2#
3# Copyright © 2021 Red Hat, Inc.
4# Copyright © 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5#
6# Author:
7#  David Woodhouse <dwmw2@infradead.org>
8#  Alex Bennée <alex.bennee@linaro.org>
9#
10# SPDX-License-Identifier: GPL-2.0-or-later
11
12import os
13
14from qemu.machine import machine
15
16from avocado_qemu import LinuxSSHMixIn
17from avocado_qemu import QemuSystemTest
18from avocado_qemu import wait_for_console_pattern
19
20class KVMXenGuest(QemuSystemTest, LinuxSSHMixIn):
21    """
22    :avocado: tags=arch:x86_64
23    :avocado: tags=machine:q35
24    :avocado: tags=accel:kvm
25    :avocado: tags=kvm_xen_guest
26    """
27
28    KERNEL_DEFAULT = 'printk.time=0 root=/dev/xvda console=ttyS0'
29
30    kernel_path = None
31    kernel_params = None
32
33    # Fetch assets from the kvm-xen-guest subdir of my shared test
34    # images directory on fileserver.linaro.org where you can find
35    # build instructions for how they where assembled.
36    def get_asset(self, name, sha1):
37        base_url = ('https://fileserver.linaro.org/s/'
38                    'kE4nCFLdQcoBF9t/download?'
39                    'path=%2Fkvm-xen-guest&files=' )
40        url = base_url + name
41        # use explicit name rather than failing to neatly parse the
42        # URL into a unique one
43        return self.fetch_asset(name=name, locations=(url), asset_hash=sha1)
44
45    def common_vm_setup(self):
46        # We also catch lack of KVM_XEN support if we fail to launch
47        self.require_accelerator("kvm")
48
49        self.vm.set_console()
50
51        self.vm.add_args("-accel", "kvm,xen-version=0x4000a,kernel-irqchip=split")
52        self.vm.add_args("-smp", "2")
53
54        self.kernel_path = self.get_asset("bzImage",
55                                          "367962983d0d32109998a70b45dcee4672d0b045")
56        self.rootfs = self.get_asset("rootfs.ext4",
57                                     "f1478401ea4b3fa2ea196396be44315bab2bb5e4")
58
59    def run_and_check(self):
60        self.vm.add_args('-kernel', self.kernel_path,
61                         '-append', self.kernel_params,
62                         '-drive',  f"file={self.rootfs},if=none,snapshot=on,format=raw,id=drv0",
63                         '-device', 'xen-disk,drive=drv0,vdev=xvda',
64                         '-device', 'virtio-net-pci,netdev=unet',
65                         '-netdev', 'user,id=unet,hostfwd=:127.0.0.1:0-:22')
66
67        try:
68            self.vm.launch()
69        except machine.VMLaunchFailure as e:
70            if "Xen HVM guest support not present" in e.output:
71                self.cancel("KVM Xen support is not present "
72                            "(need v5.12+ kernel with CONFIG_KVM_XEN)")
73            elif "Property 'kvm-accel.xen-version' not found" in e.output:
74                self.cancel("QEMU not built with CONFIG_XEN_EMU support")
75            else:
76                raise e
77
78        self.log.info('VM launched, waiting for sshd')
79        console_pattern = 'Starting dropbear sshd: OK'
80        wait_for_console_pattern(self, console_pattern, 'Oops')
81        self.log.info('sshd ready')
82        self.ssh_connect('root', '', False)
83
84        self.ssh_command('cat /proc/cmdline')
85        self.ssh_command('dmesg | grep -e "Grant table initialized"')
86
87    def test_kvm_xen_guest(self):
88        """
89        :avocado: tags=kvm_xen_guest
90        """
91
92        self.common_vm_setup()
93
94        self.kernel_params = (self.KERNEL_DEFAULT +
95                              ' xen_emul_unplug=ide-disks')
96        self.run_and_check()
97        self.ssh_command('grep xen-pirq.*msi /proc/interrupts')
98
99    def test_kvm_xen_guest_nomsi(self):
100        """
101        :avocado: tags=kvm_xen_guest_nomsi
102        """
103
104        self.common_vm_setup()
105
106        self.kernel_params = (self.KERNEL_DEFAULT +
107                              ' xen_emul_unplug=ide-disks pci=nomsi')
108        self.run_and_check()
109        self.ssh_command('grep xen-pirq.* /proc/interrupts')
110
111    def test_kvm_xen_guest_noapic_nomsi(self):
112        """
113        :avocado: tags=kvm_xen_guest_noapic_nomsi
114        """
115
116        self.common_vm_setup()
117
118        self.kernel_params = (self.KERNEL_DEFAULT +
119                              ' xen_emul_unplug=ide-disks noapic pci=nomsi')
120        self.run_and_check()
121        self.ssh_command('grep xen-pirq /proc/interrupts')
122
123    def test_kvm_xen_guest_vapic(self):
124        """
125        :avocado: tags=kvm_xen_guest_vapic
126        """
127
128        self.common_vm_setup()
129        self.vm.add_args('-cpu', 'host,+xen-vapic')
130        self.kernel_params = (self.KERNEL_DEFAULT +
131                              ' xen_emul_unplug=ide-disks')
132        self.run_and_check()
133        self.ssh_command('grep xen-pirq /proc/interrupts')
134        self.ssh_command('grep PCI-MSI /proc/interrupts')
135
136    def test_kvm_xen_guest_novector(self):
137        """
138        :avocado: tags=kvm_xen_guest_novector
139        """
140
141        self.common_vm_setup()
142        self.kernel_params = (self.KERNEL_DEFAULT +
143                              ' xen_emul_unplug=ide-disks' +
144                              ' xen_no_vector_callback')
145        self.run_and_check()
146        self.ssh_command('grep xen-platform-pci /proc/interrupts')
147
148    def test_kvm_xen_guest_novector_nomsi(self):
149        """
150        :avocado: tags=kvm_xen_guest_novector_nomsi
151        """
152
153        self.common_vm_setup()
154
155        self.kernel_params = (self.KERNEL_DEFAULT +
156                              ' xen_emul_unplug=ide-disks pci=nomsi' +
157                              ' xen_no_vector_callback')
158        self.run_and_check()
159        self.ssh_command('grep xen-platform-pci /proc/interrupts')
160
161    def test_kvm_xen_guest_novector_noapic(self):
162        """
163        :avocado: tags=kvm_xen_guest_novector_noapic
164        """
165
166        self.common_vm_setup()
167        self.kernel_params = (self.KERNEL_DEFAULT +
168                              ' xen_emul_unplug=ide-disks' +
169                              ' xen_no_vector_callback noapic')
170        self.run_and_check()
171        self.ssh_command('grep xen-platform-pci /proc/interrupts')
172