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#!/usr/bin/env python3
#
# TCG Plugins tests
#
# These are a little more involved than the basic tests run by check-tcg.
#
# Copyright (c) 2021 Linaro
#
# Author:
# Alex Bennée <alex.bennee@linaro.org>
#
# SPDX-License-Identifier: GPL-2.0-or-later
import tempfile
import mmap
import re
from qemu_test import LinuxKernelTest, Asset
class PluginKernelBase(LinuxKernelTest):
"""
Boots a Linux kernel with a TCG plugin enabled.
"""
timeout = 120
KERNEL_COMMON_COMMAND_LINE = 'printk.time=1 panic=-1 '
def run_vm(self, kernel_path, kernel_command_line,
plugin, plugin_log, console_pattern, args=None):
vm = self.get_vm()
vm.set_console()
vm.add_args('-kernel', kernel_path,
'-append', kernel_command_line,
'-plugin', plugin,
'-d', 'plugin',
'-D', plugin_log,
'-net', 'none',
'-no-reboot')
if args:
vm.add_args(*args)
try:
vm.launch()
except:
# TODO: probably fails because plugins not enabled but we
# can't currently probe for the feature.
self.cancel("TCG Plugins not enabled?")
self.wait_for_console_pattern(console_pattern, vm)
# ensure logs are flushed
vm.shutdown()
class PluginKernelNormal(PluginKernelBase):
ASSET_KERNEL = Asset(
('https://storage.tuxboot.com/20230331/arm64/Image'),
'ce95a7101a5fecebe0fe630deee6bd97b32ba41bc8754090e9ad8961ea8674c7')
def test_aarch64_virt_insn(self):
self.set_machine('virt')
self.cpu='cortex-a53'
kernel_path = self.ASSET_KERNEL.fetch()
kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
'console=ttyAMA0')
console_pattern = 'Kernel panic - not syncing: VFS:'
plugin_log = tempfile.NamedTemporaryFile(mode="r+t", prefix="plugin",
suffix=".log")
self.run_vm(kernel_path, kernel_command_line,
"tests/tcg/plugins/libinsn.so", plugin_log.name,
console_pattern)
with plugin_log as lf, \
mmap.mmap(lf.fileno(), 0, access=mmap.ACCESS_READ) as s:
m = re.search(br"insns: (?P<count>\d+)", s)
if "count" not in m.groupdict():
self.fail("Failed to find instruction count")
else:
count = int(m.group("count"))
self.log.info(f"Counted: {count} instructions")
def test_aarch64_virt_insn_icount(self):
self.set_machine('virt')
self.cpu='cortex-a53'
kernel_path = self.ASSET_KERNEL.fetch()
kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
'console=ttyAMA0')
console_pattern = 'Kernel panic - not syncing: VFS:'
plugin_log = tempfile.NamedTemporaryFile(mode="r+t", prefix="plugin",
suffix=".log")
self.run_vm(kernel_path, kernel_command_line,
"tests/tcg/plugins/libinsn.so", plugin_log.name,
console_pattern,
args=('-icount', 'shift=1'))
with plugin_log as lf, \
mmap.mmap(lf.fileno(), 0, access=mmap.ACCESS_READ) as s:
m = re.search(br"insns: (?P<count>\d+)", s)
if "count" not in m.groupdict():
self.fail("Failed to find instruction count")
else:
count = int(m.group("count"))
self.log.info(f"Counted: {count} instructions")
if __name__ == '__main__':
LinuxKernelTest.main()
|
