tests/acceptance/boot_linux_console.py

   1 # Functional test that boots a Linux kernel and checks the console
   2 #
   3 # Copyright (c) 2018 Red Hat, Inc.
   4 #
   5 # Author:
   6 #  Cleber Rosa <crosa@redhat.com>
   7 #
   8 # This work is licensed under the terms of the GNU GPL, version 2 or
   9 # later.  See the COPYING file in the top-level directory.
  10
  11 import os
  12 import lzma
  13 import gzip
  14 import shutil
  15
  16 from avocado import skipUnless
  17 from avocado_qemu import Test
  18 from avocado_qemu import exec_command_and_wait_for_pattern
  19 from avocado_qemu import wait_for_console_pattern
  20 from avocado.utils import process
  21 from avocado.utils import archive
  22
  23
  24 class BootLinuxConsole(Test):
  25     """
  26     Boots a Linux kernel and checks that the console is operational and the
  27     kernel command line is properly passed from QEMU to the kernel
  28     """
  29
  30     timeout = 90
  31
  32     KERNEL_COMMON_COMMAND_LINE = 'printk.time=0 '
  33
  34     def wait_for_console_pattern(self, success_message):
  35         wait_for_console_pattern(self, success_message,
  36                                  failure_message='Kernel panic - not syncing')
  37
  38     def extract_from_deb(self, deb, path):
  39         """
  40         Extracts a file from a deb package into the test workdir
  41
  42         :param deb: path to the deb archive
  43         :param file: path within the deb archive of the file to be extracted
  44         :returns: path of the extracted file
  45         """
  46         cwd = os.getcwd()
  47         os.chdir(self.workdir)
  48         file_path = process.run("ar t %s" % deb).stdout_text.split()[2]
  49         process.run("ar x %s %s" % (deb, file_path))
  50         archive.extract(file_path, self.workdir)
  51         os.chdir(cwd)
  52         return self.workdir + path
  53
  54     def test_x86_64_pc(self):
  55         """
  56         :avocado: tags=arch:x86_64
  57         :avocado: tags=machine:pc
  58         """
  59         kernel_url = ('https://archives.fedoraproject.org/pub/archive/fedora'
  60                       '/linux/releases/29/Everything/x86_64/os/images/pxeboot'
  61                       '/vmlinuz')
  62         kernel_hash = '23bebd2680757891cf7adedb033532163a792495'
  63         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
  64
  65         self.vm.set_machine('pc')
  66         self.vm.set_console()
  67         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=ttyS0'
  68         self.vm.add_args('-kernel', kernel_path,
  69                          '-append', kernel_command_line)
  70         self.vm.launch()
  71         console_pattern = 'Kernel command line: %s' % kernel_command_line
  72         self.wait_for_console_pattern(console_pattern)
  73
  74     def test_mips_malta(self):
  75         """
  76         :avocado: tags=arch:mips
  77         :avocado: tags=machine:malta
  78         :avocado: tags=endian:big
  79         """
  80         deb_url = ('http://snapshot.debian.org/archive/debian/'
  81                    '20130217T032700Z/pool/main/l/linux-2.6/'
  82                    'linux-image-2.6.32-5-4kc-malta_2.6.32-48_mips.deb')
  83         deb_hash = 'a8cfc28ad8f45f54811fc6cf74fc43ffcfe0ba04'
  84         deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
  85         kernel_path = self.extract_from_deb(deb_path,
  86                                             '/boot/vmlinux-2.6.32-5-4kc-malta')
  87
  88         self.vm.set_machine('malta')
  89         self.vm.set_console()
  90         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=ttyS0'
  91         self.vm.add_args('-kernel', kernel_path,
  92                          '-append', kernel_command_line)
  93         self.vm.launch()
  94         console_pattern = 'Kernel command line: %s' % kernel_command_line
  95         self.wait_for_console_pattern(console_pattern)
  96
  97     def test_mips64el_malta(self):
  98         """
  99         This test requires the ar tool to extract "data.tar.gz" from
 100         the Debian package.
 101
 102         The kernel can be rebuilt using this Debian kernel source [1] and
 103         following the instructions on [2].
 104
 105         [1] http://snapshot.debian.org/package/linux-2.6/2.6.32-48/
 106             #linux-source-2.6.32_2.6.32-48
 107         [2] https://kernel-team.pages.debian.net/kernel-handbook/
 108             ch-common-tasks.html#s-common-official
 109
 110         :avocado: tags=arch:mips64el
 111         :avocado: tags=machine:malta
 112         """
 113         deb_url = ('http://snapshot.debian.org/archive/debian/'
 114                    '20130217T032700Z/pool/main/l/linux-2.6/'
 115                    'linux-image-2.6.32-5-5kc-malta_2.6.32-48_mipsel.deb')
 116         deb_hash = '1aaec92083bf22fda31e0d27fa8d9a388e5fc3d5'
 117         deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
 118         kernel_path = self.extract_from_deb(deb_path,
 119                                             '/boot/vmlinux-2.6.32-5-5kc-malta')
 120
 121         self.vm.set_machine('malta')
 122         self.vm.set_console()
 123         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=ttyS0'
 124         self.vm.add_args('-kernel', kernel_path,
 125                          '-append', kernel_command_line)
 126         self.vm.launch()
 127         console_pattern = 'Kernel command line: %s' % kernel_command_line
 128         self.wait_for_console_pattern(console_pattern)
 129
 130     def test_mips_malta_cpio(self):
 131         """
 132         :avocado: tags=arch:mips
 133         :avocado: tags=machine:malta
 134         :avocado: tags=endian:big
 135         """
 136         deb_url = ('http://snapshot.debian.org/archive/debian/'
 137                    '20160601T041800Z/pool/main/l/linux/'
 138                    'linux-image-4.5.0-2-4kc-malta_4.5.5-1_mips.deb')
 139         deb_hash = 'a3c84f3e88b54e06107d65a410d1d1e8e0f340f8'
 140         deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
 141         kernel_path = self.extract_from_deb(deb_path,
 142                                             '/boot/vmlinux-4.5.0-2-4kc-malta')
 143         initrd_url = ('https://github.com/groeck/linux-build-test/raw/'
 144                       '8584a59ed9e5eb5ee7ca91f6d74bbb06619205b8/rootfs/'
 145                       'mips/rootfs.cpio.gz')
 146         initrd_hash = 'bf806e17009360a866bf537f6de66590de349a99'
 147         initrd_path_gz = self.fetch_asset(initrd_url, asset_hash=initrd_hash)
 148         initrd_path = self.workdir + "rootfs.cpio"
 149         archive.gzip_uncompress(initrd_path_gz, initrd_path)
 150
 151         self.vm.set_machine('malta')
 152         self.vm.set_console()
 153         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE
 154                                + 'console=ttyS0 console=tty '
 155                                + 'rdinit=/sbin/init noreboot')
 156         self.vm.add_args('-kernel', kernel_path,
 157                          '-initrd', initrd_path,
 158                          '-append', kernel_command_line,
 159                          '-no-reboot')
 160         self.vm.launch()
 161         self.wait_for_console_pattern('Boot successful.')
 162
 163         exec_command_and_wait_for_pattern(self, 'cat /proc/cpuinfo',
 164                                                 'BogoMIPS')
 165         exec_command_and_wait_for_pattern(self, 'uname -a',
 166                                                 'Debian')
 167         exec_command_and_wait_for_pattern(self, 'reboot',
 168                                                 'reboot: Restarting system')
 169
 170     @skipUnless(os.getenv('AVOCADO_ALLOW_UNTRUSTED_CODE'), 'untrusted code')
 171     def test_mips64el_malta_5KEc_cpio(self):
 172         """
 173         :avocado: tags=arch:mips64el
 174         :avocado: tags=machine:malta
 175         :avocado: tags=endian:little
 176         """
 177         kernel_url = ('https://github.com/philmd/qemu-testing-blob/'
 178                       'raw/9ad2df38/mips/malta/mips64el/'
 179                       'vmlinux-3.19.3.mtoman.20150408')
 180         kernel_hash = '00d1d268fb9f7d8beda1de6bebcc46e884d71754'
 181         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 182         initrd_url = ('https://github.com/groeck/linux-build-test/'
 183                       'raw/8584a59e/rootfs/'
 184                       'mipsel64/rootfs.mipsel64r1.cpio.gz')
 185         initrd_hash = '1dbb8a396e916847325284dbe2151167'
 186         initrd_path_gz = self.fetch_asset(initrd_url, algorithm='md5',
 187                                           asset_hash=initrd_hash)
 188         initrd_path = self.workdir + "rootfs.cpio"
 189         archive.gzip_uncompress(initrd_path_gz, initrd_path)
 190
 191         self.vm.set_machine('malta')
 192         self.vm.set_console()
 193         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE
 194                                + 'console=ttyS0 console=tty '
 195                                + 'rdinit=/sbin/init noreboot')
 196         self.vm.add_args('-cpu', '5KEc',
 197                          '-kernel', kernel_path,
 198                          '-initrd', initrd_path,
 199                          '-append', kernel_command_line,
 200                          '-no-reboot')
 201         self.vm.launch()
 202         wait_for_console_pattern(self, 'Boot successful.')
 203
 204         exec_command_and_wait_for_pattern(self, 'cat /proc/cpuinfo',
 205                                                 'MIPS 5KE')
 206         exec_command_and_wait_for_pattern(self, 'uname -a',
 207                                                 '3.19.3.mtoman.20150408')
 208         exec_command_and_wait_for_pattern(self, 'reboot',
 209                                                 'reboot: Restarting system')
 210
 211     def do_test_mips_malta32el_nanomips(self, kernel_url, kernel_hash):
 212         kernel_path_xz = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 213         kernel_path = self.workdir + "kernel"
 214         with lzma.open(kernel_path_xz, 'rb') as f_in:
 215             with open(kernel_path, 'wb') as f_out:
 216                 shutil.copyfileobj(f_in, f_out)
 217
 218         self.vm.set_machine('malta')
 219         self.vm.set_console()
 220         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE
 221                                + 'mem=256m@@0x0 '
 222                                + 'console=ttyS0')
 223         self.vm.add_args('-no-reboot',
 224                          '-cpu', 'I7200',
 225                          '-kernel', kernel_path,
 226                          '-append', kernel_command_line)
 227         self.vm.launch()
 228         console_pattern = 'Kernel command line: %s' % kernel_command_line
 229         self.wait_for_console_pattern(console_pattern)
 230
 231     def test_mips_malta32el_nanomips_4k(self):
 232         """
 233         :avocado: tags=arch:mipsel
 234         :avocado: tags=machine:malta
 235         :avocado: tags=endian:little
 236         """
 237         kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
 238                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
 239                       'generic_nano32r6el_page4k.xz')
 240         kernel_hash = '477456aafd2a0f1ddc9482727f20fe9575565dd6'
 241         self.do_test_mips_malta32el_nanomips(kernel_url, kernel_hash)
 242
 243     def test_mips_malta32el_nanomips_16k_up(self):
 244         """
 245         :avocado: tags=arch:mipsel
 246         :avocado: tags=machine:malta
 247         :avocado: tags=endian:little
 248         """
 249         kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
 250                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
 251                       'generic_nano32r6el_page16k_up.xz')
 252         kernel_hash = 'e882868f944c71c816e832e2303b7874d044a7bc'
 253         self.do_test_mips_malta32el_nanomips(kernel_url, kernel_hash)
 254
 255     def test_mips_malta32el_nanomips_64k_dbg(self):
 256         """
 257         :avocado: tags=arch:mipsel
 258         :avocado: tags=machine:malta
 259         :avocado: tags=endian:little
 260         """
 261         kernel_url = ('https://mipsdistros.mips.com/LinuxDistro/nanomips/'
 262                       'kernels/v4.15.18-432-gb2eb9a8b07a1-20180627102142/'
 263                       'generic_nano32r6el_page64k_dbg.xz')
 264         kernel_hash = '18d1c68f2e23429e266ca39ba5349ccd0aeb7180'
 265         self.do_test_mips_malta32el_nanomips(kernel_url, kernel_hash)
 266
 267     def test_aarch64_virt(self):
 268         """
 269         :avocado: tags=arch:aarch64
 270         :avocado: tags=machine:virt
 271         """
 272         kernel_url = ('https://archives.fedoraproject.org/pub/archive/fedora'
 273                       '/linux/releases/29/Everything/aarch64/os/images/pxeboot'
 274                       '/vmlinuz')
 275         kernel_hash = '8c73e469fc6ea06a58dc83a628fc695b693b8493'
 276         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 277
 278         self.vm.set_machine('virt')
 279         self.vm.set_console()
 280         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
 281                                'console=ttyAMA0')
 282         self.vm.add_args('-cpu', 'cortex-a53',
 283                          '-kernel', kernel_path,
 284                          '-append', kernel_command_line)
 285         self.vm.launch()
 286         console_pattern = 'Kernel command line: %s' % kernel_command_line
 287         self.wait_for_console_pattern(console_pattern)
 288
 289     def test_arm_virt(self):
 290         """
 291         :avocado: tags=arch:arm
 292         :avocado: tags=machine:virt
 293         """
 294         kernel_url = ('https://archives.fedoraproject.org/pub/archive/fedora'
 295                       '/linux/releases/29/Everything/armhfp/os/images/pxeboot'
 296                       '/vmlinuz')
 297         kernel_hash = 'e9826d741b4fb04cadba8d4824d1ed3b7fb8b4d4'
 298         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 299
 300         self.vm.set_machine('virt')
 301         self.vm.set_console()
 302         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
 303                                'console=ttyAMA0')
 304         self.vm.add_args('-kernel', kernel_path,
 305                          '-append', kernel_command_line)
 306         self.vm.launch()
 307         console_pattern = 'Kernel command line: %s' % kernel_command_line
 308         self.wait_for_console_pattern(console_pattern)
 309
 310     def test_arm_emcraft_sf2(self):
 311         """
 312         :avocado: tags=arch:arm
 313         :avocado: tags=machine:emcraft_sf2
 314         :avocado: tags=endian:little
 315         """
 316         uboot_url = ('https://raw.githubusercontent.com/'
 317                      'Subbaraya-Sundeep/qemu-test-binaries/'
 318                      'fa030bd77a014a0b8e360d3b7011df89283a2f0b/u-boot')
 319         uboot_hash = 'abba5d9c24cdd2d49cdc2a8aa92976cf20737eff'
 320         uboot_path = self.fetch_asset(uboot_url, asset_hash=uboot_hash)
 321         spi_url = ('https://raw.githubusercontent.com/'
 322                    'Subbaraya-Sundeep/qemu-test-binaries/'
 323                    'fa030bd77a014a0b8e360d3b7011df89283a2f0b/spi.bin')
 324         spi_hash = '85f698329d38de63aea6e884a86fbde70890a78a'
 325         spi_path = self.fetch_asset(spi_url, asset_hash=spi_hash)
 326
 327         self.vm.set_machine('emcraft-sf2')
 328         self.vm.set_console()
 329         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE
 330         self.vm.add_args('-kernel', uboot_path,
 331                          '-append', kernel_command_line,
 332                          '-drive', 'file=' + spi_path + ',if=mtd,format=raw',
 333                          '-no-reboot')
 334         self.vm.launch()
 335         self.wait_for_console_pattern('init started: BusyBox')
 336
 337     def do_test_arm_raspi2(self, uart_id):
 338         """
 339         The kernel can be rebuilt using the kernel source referenced
 340         and following the instructions on the on:
 341         https://www.raspberrypi.org/documentation/linux/kernel/building.md
 342         """
 343         serial_kernel_cmdline = {
 344             0: 'earlycon=pl011,0x3f201000 console=ttyAMA0',
 345         }
 346         deb_url = ('http://archive.raspberrypi.org/debian/'
 347                    'pool/main/r/raspberrypi-firmware/'
 348                    'raspberrypi-kernel_1.20190215-1_armhf.deb')
 349         deb_hash = 'cd284220b32128c5084037553db3c482426f3972'
 350         deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
 351         kernel_path = self.extract_from_deb(deb_path, '/boot/kernel7.img')
 352         dtb_path = self.extract_from_deb(deb_path, '/boot/bcm2709-rpi-2-b.dtb')
 353
 354         self.vm.set_machine('raspi2')
 355         self.vm.set_console()
 356         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
 357                                serial_kernel_cmdline[uart_id])
 358         self.vm.add_args('-kernel', kernel_path,
 359                          '-dtb', dtb_path,
 360                          '-append', kernel_command_line)
 361         self.vm.launch()
 362         console_pattern = 'Kernel command line: %s' % kernel_command_line
 363         self.wait_for_console_pattern(console_pattern)
 364
 365     def test_arm_raspi2_uart0(self):
 366         """
 367         :avocado: tags=arch:arm
 368         :avocado: tags=machine:raspi2
 369         :avocado: tags=device:pl011
 370         """
 371         self.do_test_arm_raspi2(0)
 372
 373     def test_arm_exynos4210_initrd(self):
 374         """
 375         :avocado: tags=arch:arm
 376         :avocado: tags=machine:smdkc210
 377         """
 378         deb_url = ('https://snapshot.debian.org/archive/debian/'
 379                    '20190928T224601Z/pool/main/l/linux/'
 380                    'linux-image-4.19.0-6-armmp_4.19.67-2+deb10u1_armhf.deb')
 381         deb_hash = 'fa9df4a0d38936cb50084838f2cb933f570d7d82'
 382         deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
 383         kernel_path = self.extract_from_deb(deb_path,
 384                                             '/boot/vmlinuz-4.19.0-6-armmp')
 385         dtb_path = '/usr/lib/linux-image-4.19.0-6-armmp/exynos4210-smdkv310.dtb'
 386         dtb_path = self.extract_from_deb(deb_path, dtb_path)
 387
 388         initrd_url = ('https://github.com/groeck/linux-build-test/raw/'
 389                       '2eb0a73b5d5a28df3170c546ddaaa9757e1e0848/rootfs/'
 390                       'arm/rootfs-armv5.cpio.gz')
 391         initrd_hash = '2b50f1873e113523967806f4da2afe385462ff9b'
 392         initrd_path_gz = self.fetch_asset(initrd_url, asset_hash=initrd_hash)
 393         initrd_path = os.path.join(self.workdir, 'rootfs.cpio')
 394         archive.gzip_uncompress(initrd_path_gz, initrd_path)
 395
 396         self.vm.set_machine('smdkc210')
 397         self.vm.set_console()
 398         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
 399                                'earlycon=exynos4210,0x13800000 earlyprintk ' +
 400                                'console=ttySAC0,115200n8 ' +
 401                                'random.trust_cpu=off cryptomgr.notests ' +
 402                                'cpuidle.off=1 panic=-1 noreboot')
 403
 404         self.vm.add_args('-kernel', kernel_path,
 405                          '-dtb', dtb_path,
 406                          '-initrd', initrd_path,
 407                          '-append', kernel_command_line,
 408                          '-no-reboot')
 409         self.vm.launch()
 410
 411         self.wait_for_console_pattern('Boot successful.')
 412         # TODO user command, for now the uart is stuck
 413
 414     def test_s390x_s390_ccw_virtio(self):
 415         """
 416         :avocado: tags=arch:s390x
 417         :avocado: tags=machine:s390_ccw_virtio
 418         """
 419         kernel_url = ('https://archives.fedoraproject.org/pub/archive'
 420                       '/fedora-secondary/releases/29/Everything/s390x/os/images'
 421                       '/kernel.img')
 422         kernel_hash = 'e8e8439103ef8053418ef062644ffd46a7919313'
 423         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 424
 425         self.vm.set_machine('s390-ccw-virtio')
 426         self.vm.set_console()
 427         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=sclp0'
 428         self.vm.add_args('-nodefaults',
 429                          '-kernel', kernel_path,
 430                          '-append', kernel_command_line)
 431         self.vm.launch()
 432         console_pattern = 'Kernel command line: %s' % kernel_command_line
 433         self.wait_for_console_pattern(console_pattern)
 434
 435     def test_alpha_clipper(self):
 436         """
 437         :avocado: tags=arch:alpha
 438         :avocado: tags=machine:clipper
 439         """
 440         kernel_url = ('http://archive.debian.org/debian/dists/lenny/main/'
 441                       'installer-alpha/current/images/cdrom/vmlinuz')
 442         kernel_hash = '3a943149335529e2ed3e74d0d787b85fb5671ba3'
 443         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 444
 445         uncompressed_kernel = archive.uncompress(kernel_path, self.workdir)
 446
 447         self.vm.set_machine('clipper')
 448         self.vm.set_console()
 449         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=ttyS0'
 450         self.vm.add_args('-vga', 'std',
 451                          '-kernel', uncompressed_kernel,
 452                          '-append', kernel_command_line)
 453         self.vm.launch()
 454         console_pattern = 'Kernel command line: %s' % kernel_command_line
 455         self.wait_for_console_pattern(console_pattern)
 456
 457     def test_ppc64_pseries(self):
 458         """
 459         :avocado: tags=arch:ppc64
 460         :avocado: tags=machine:pseries
 461         """
 462         kernel_url = ('https://archives.fedoraproject.org/pub/archive'
 463                       '/fedora-secondary/releases/29/Everything/ppc64le/os'
 464                       '/ppc/ppc64/vmlinuz')
 465         kernel_hash = '3fe04abfc852b66653b8c3c897a59a689270bc77'
 466         kernel_path = self.fetch_asset(kernel_url, asset_hash=kernel_hash)
 467
 468         self.vm.set_machine('pseries')
 469         self.vm.set_console()
 470         kernel_command_line = self.KERNEL_COMMON_COMMAND_LINE + 'console=hvc0'
 471         self.vm.add_args('-kernel', kernel_path,
 472                          '-append', kernel_command_line)
 473         self.vm.launch()
 474         console_pattern = 'Kernel command line: %s' % kernel_command_line
 475         self.wait_for_console_pattern(console_pattern)
 476
 477     def test_m68k_q800(self):
 478         """
 479         :avocado: tags=arch:m68k
 480         :avocado: tags=machine:q800
 481         """
 482         deb_url = ('http://ftp.ports.debian.org/debian-ports/pool-m68k/main'
 483                    '/l/linux/kernel-image-5.3.0-1-m68k-di_5.3.7-1_m68k.udeb')
 484         deb_hash = '044954bb9be4160a3ce81f8bc1b5e856b75cccd1'
 485         try:
 486             deb_path = self.fetch_asset(deb_url, asset_hash=deb_hash)
 487         except OSError as exp:
 488             self.cancel(exp)
 489         kernel_path = self.extract_from_deb(deb_path,
 490                                             '/boot/vmlinux-5.3.0-1-m68k')
 491
 492         self.vm.set_machine('q800')
 493         self.vm.set_console()
 494         kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
 495                                'console=ttyS0 vga=off')
 496         self.vm.add_args('-kernel', kernel_path,
 497                          '-append', kernel_command_line)
 498         self.vm.launch()
 499         console_pattern = 'Kernel command line: %s' % kernel_command_line
 500         self.wait_for_console_pattern(console_pattern)
 501         console_pattern = 'No filesystem could mount root'
 502         self.wait_for_console_pattern(console_pattern)