tests/vm/aarch64vm.py

   1 #!/usr/bin/env python3
   2 #
   3 # VM testing aarch64 library
   4 #
   5 # Copyright 2020 Linaro
   6 #
   7 # Authors:
   8 #  Robert Foley <robert.foley@linaro.org>
   9 #
  10 # This code is licensed under the GPL version 2 or later.  See
  11 # the COPYING file in the top-level directory.
  12 #
  13 import os
  14 import sys
  15 import subprocess
  16 import basevm
  17 from qemu.accel import kvm_available
  18
  19 # This is the config needed for current version of QEMU.
  20 # This works for both kvm and tcg.
  21 CURRENT_CONFIG = {
  22     'cpu'          : "max",
  23     'machine'      : "virt,gic-version=max",
  24 }
  25
  26 # The minimum minor version of QEMU we will support with aarch64 VMs is 3.
  27 # QEMU versions less than 3 have various issues running these VMs.
  28 QEMU_AARCH64_MIN_VERSION = 3
  29
  30 # The DEFAULT_CONFIG will default to a version of
  31 # parameters that works for backwards compatibility.
  32 DEFAULT_CONFIG = {'kvm' : {'cpu'          : "host",
  33                            'machine'      : "virt,gic-version=host"},
  34                   'tcg' : {'cpu'          : "cortex-a57",
  35                            'machine'      : "virt"},
  36 }
  37
  38 def get_config_defaults(vmcls, default_config):
  39     """Fetch the configuration defaults for this VM,
  40        taking into consideration the defaults for
  41        aarch64 first, followed by the defaults for this VM."""
  42     config = default_config
  43     config.update(aarch_get_config_defaults(vmcls))
  44     return config
  45
  46 def aarch_get_config_defaults(vmcls):
  47     """Set the defaults for current version of QEMU."""
  48     config = CURRENT_CONFIG
  49     args = basevm.parse_args(vmcls)
  50     qemu_path = basevm.get_qemu_path(vmcls.arch, args.build_path)
  51     qemu_version = basevm.get_qemu_version(qemu_path)
  52     if qemu_version < QEMU_AARCH64_MIN_VERSION:
  53         error = "\nThis major version of QEMU {} is to old for aarch64 VMs.\n"\
  54                 "The major version must be at least {}.\n"\
  55                 "To continue with the current build of QEMU, "\
  56                 "please restart with QEMU_LOCAL=1 .\n"
  57         print(error.format(qemu_version, QEMU_AARCH64_MIN_VERSION))
  58         exit(1)
  59     if qemu_version == QEMU_AARCH64_MIN_VERSION:
  60         # We have an older version of QEMU,
  61         # set the config values for backwards compatibility.
  62         if kvm_available('aarch64'):
  63             config.update(DEFAULT_CONFIG['kvm'])
  64         else:
  65             config.update(DEFAULT_CONFIG['tcg'])
  66     return config
  67
  68 def create_flash_images(flash_dir="./", efi_img=""):
  69     """Creates the appropriate pflash files
  70        for an aarch64 VM."""
  71     flash0_path = get_flash_path(flash_dir, "flash0")
  72     flash1_path = get_flash_path(flash_dir, "flash1")
  73     fd_null = open(os.devnull, 'w')
  74     subprocess.check_call(["dd", "if=/dev/zero", "of={}".format(flash0_path),
  75                            "bs=1M", "count=64"],
  76                            stdout=fd_null, stderr=subprocess.STDOUT)
  77     # A reliable way to get the QEMU EFI image is via an installed package or
  78     # via the bios included with qemu.
  79     if not os.path.exists(efi_img):
  80         sys.stderr.write("*** efi argument is invalid ({})\n".format(efi_img))
  81         sys.stderr.write("*** please check --efi-aarch64 argument or "\
  82                          "install qemu-efi-aarch64 package\n")
  83         exit(3)
  84     subprocess.check_call(["dd", "if={}".format(efi_img),
  85                            "of={}".format(flash0_path),
  86                            "conv=notrunc"],
  87                            stdout=fd_null, stderr=subprocess.STDOUT)
  88     subprocess.check_call(["dd", "if=/dev/zero",
  89                            "of={}".format(flash1_path),
  90                            "bs=1M", "count=64"],
  91                            stdout=fd_null, stderr=subprocess.STDOUT)
  92     fd_null.close()
  93
  94 def get_pflash_args(flash_dir="./"):
  95     """Returns a string that can be used to
  96        boot qemu using the appropriate pflash files
  97        for aarch64."""
  98     flash0_path = get_flash_path(flash_dir, "flash0")
  99     flash1_path = get_flash_path(flash_dir, "flash1")
 100     pflash_args_str = "-drive file={},format=raw,if=pflash "\
 101                       "-drive file={},format=raw,if=pflash"
 102     pflash_args = pflash_args_str.format(flash0_path, flash1_path)
 103     return pflash_args.split(" ")
 104
 105 def get_flash_path(flash_dir, name):
 106     return os.path.join(flash_dir, "{}.img".format(name))