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#!/usr/bin/env python3
#
# VM testing aarch64 library
#
# Copyright 2020 Linaro
#
# Authors:
# Robert Foley <robert.foley@linaro.org>
#
# This code is licensed under the GPL version 2 or later. See
# the COPYING file in the top-level directory.
#
import os
import sys
import subprocess
import basevm
from qemu.accel import kvm_available
# This is the config needed for current version of QEMU.
# This works for both kvm and tcg.
CURRENT_CONFIG = {
'cpu' : "max",
'machine' : "virt,gic-version=max",
}
# The minimum minor version of QEMU we will support with aarch64 VMs is 3.
# QEMU versions less than 3 have various issues running these VMs.
QEMU_AARCH64_MIN_VERSION = 3
# The DEFAULT_CONFIG will default to a version of
# parameters that works for backwards compatibility.
DEFAULT_CONFIG = {'kvm' : {'cpu' : "host",
'machine' : "virt,gic-version=host"},
'tcg' : {'cpu' : "cortex-a57",
'machine' : "virt"},
}
def get_config_defaults(vmcls, default_config):
"""Fetch the configuration defaults for this VM,
taking into consideration the defaults for
aarch64 first, followed by the defaults for this VM."""
config = default_config
config.update(aarch_get_config_defaults(vmcls))
return config
def aarch_get_config_defaults(vmcls):
"""Set the defaults for current version of QEMU."""
config = CURRENT_CONFIG
args, argv = basevm.parse_args(vmcls)
qemu_path = basevm.get_qemu_path(vmcls.arch, args.build_path)
qemu_version = basevm.get_qemu_version(qemu_path)
if qemu_version < QEMU_AARCH64_MIN_VERSION:
error = "\nThis major version of QEMU {} is to old for aarch64 VMs.\n"\
"The major version must be at least {}.\n"\
"To continue with the current build of QEMU, "\
"please restart with QEMU_LOCAL=1 .\n"
print(error.format(qemu_version, QEMU_AARCH64_MIN_VERSION))
exit(1)
if qemu_version == QEMU_AARCH64_MIN_VERSION:
# We have an older version of QEMU,
# set the config values for backwards compatibility.
if kvm_available('aarch64'):
config.update(DEFAULT_CONFIG['kvm'])
else:
config.update(DEFAULT_CONFIG['tcg'])
return config
def create_flash_images(flash_dir="./", efi_img=""):
"""Creates the appropriate pflash files
for an aarch64 VM."""
flash0_path = get_flash_path(flash_dir, "flash0")
flash1_path = get_flash_path(flash_dir, "flash1")
fd_null = open(os.devnull, 'w')
subprocess.check_call(["dd", "if=/dev/zero", "of={}".format(flash0_path),
"bs=1M", "count=64"],
stdout=fd_null, stderr=subprocess.STDOUT)
# A reliable way to get the QEMU EFI image is via an installed package or
# via the bios included with qemu.
if not os.path.exists(efi_img):
sys.stderr.write("*** efi argument is invalid ({})\n".format(efi_img))
sys.stderr.write("*** please check --efi-aarch64 argument or "\
"install qemu-efi-aarch64 package\n")
exit(3)
subprocess.check_call(["dd", "if={}".format(efi_img),
"of={}".format(flash0_path),
"conv=notrunc"],
stdout=fd_null, stderr=subprocess.STDOUT)
subprocess.check_call(["dd", "if=/dev/zero",
"of={}".format(flash1_path),
"bs=1M", "count=64"],
stdout=fd_null, stderr=subprocess.STDOUT)
fd_null.close()
def get_pflash_args(flash_dir="./"):
"""Returns a string that can be used to
boot qemu using the appropriate pflash files
for aarch64."""
flash0_path = get_flash_path(flash_dir, "flash0")
flash1_path = get_flash_path(flash_dir, "flash1")
pflash_args_str = "-drive file={},format=raw,if=pflash "\
"-drive file={},format=raw,if=pflash"
pflash_args = pflash_args_str.format(flash0_path, flash1_path)
return pflash_args.split(" ")
def get_flash_path(flash_dir, name):
return os.path.join(flash_dir, "{}.img".format(name))
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