tcg_plugins.py (5295B)
1 # TCG Plugins tests 2 # 3 # These are a little more involved than the basic tests run by check-tcg. 4 # 5 # Copyright (c) 2021 Linaro 6 # 7 # Author: 8 # Alex Bennée <alex.bennee@linaro.org> 9 # 10 # SPDX-License-Identifier: GPL-2.0-or-later 11 12 import tempfile 13 import mmap 14 import re 15 16 from boot_linux_console import LinuxKernelTest 17 18 19 class PluginKernelBase(LinuxKernelTest): 20 """ 21 Boots a Linux kernel with a TCG plugin enabled. 22 """ 23 24 timeout = 120 25 KERNEL_COMMON_COMMAND_LINE = 'printk.time=1 panic=-1 ' 26 27 def run_vm(self, kernel_path, kernel_command_line, 28 plugin, plugin_log, console_pattern, args=None): 29 30 vm = self.get_vm() 31 vm.set_console() 32 vm.add_args('-kernel', kernel_path, 33 '-append', kernel_command_line, 34 '-plugin', plugin, 35 '-d', 'plugin', 36 '-D', plugin_log, 37 '-net', 'none', 38 '-no-reboot') 39 if args: 40 vm.add_args(*args) 41 42 try: 43 vm.launch() 44 except: 45 # TODO: probably fails because plugins not enabled but we 46 # can't currently probe for the feature. 47 self.cancel("TCG Plugins not enabled?") 48 49 self.wait_for_console_pattern(console_pattern, vm) 50 # ensure logs are flushed 51 vm.shutdown() 52 53 54 class PluginKernelNormal(PluginKernelBase): 55 56 def _grab_aarch64_kernel(self): 57 kernel_url = ('http://security.debian.org/' 58 'debian-security/pool/updates/main/l/linux-signed-arm64/' 59 'linux-image-4.19.0-12-arm64_4.19.152-1_arm64.deb') 60 kernel_sha1 = '2036c2792f80ac9c4ccaae742b2e0a28385b6010' 61 kernel_deb = self.fetch_asset(kernel_url, asset_hash=kernel_sha1) 62 kernel_path = self.extract_from_deb(kernel_deb, 63 "/boot/vmlinuz-4.19.0-12-arm64") 64 return kernel_path 65 66 def test_aarch64_virt_insn(self): 67 """ 68 :avocado: tags=accel:tcg 69 :avocado: tags=arch:aarch64 70 :avocado: tags=machine:virt 71 :avocado: tags=cpu:cortex-a53 72 """ 73 kernel_path = self._grab_aarch64_kernel() 74 kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE + 75 'console=ttyAMA0') 76 console_pattern = 'Kernel panic - not syncing: VFS:' 77 78 plugin_log = tempfile.NamedTemporaryFile(mode="r+t", prefix="plugin", 79 suffix=".log") 80 81 self.run_vm(kernel_path, kernel_command_line, 82 "tests/plugin/libinsn.so", plugin_log.name, 83 console_pattern) 84 85 with plugin_log as lf, \ 86 mmap.mmap(lf.fileno(), 0, access=mmap.ACCESS_READ) as s: 87 88 m = re.search(br"insns: (?P<count>\d+)", s) 89 if "count" not in m.groupdict(): 90 self.fail("Failed to find instruction count") 91 92 def test_aarch64_virt_insn_icount(self): 93 """ 94 :avocado: tags=accel:tcg 95 :avocado: tags=arch:aarch64 96 :avocado: tags=machine:virt 97 :avocado: tags=cpu:cortex-a53 98 """ 99 kernel_path = self._grab_aarch64_kernel() 100 kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE + 101 'console=ttyAMA0') 102 console_pattern = 'Kernel panic - not syncing: VFS:' 103 104 plugin_log = tempfile.NamedTemporaryFile(mode="r+t", prefix="plugin", 105 suffix=".log") 106 107 self.run_vm(kernel_path, kernel_command_line, 108 "tests/plugin/libinsn.so", plugin_log.name, 109 console_pattern, 110 args=('-icount', 'shift=1')) 111 112 with plugin_log as lf, \ 113 mmap.mmap(lf.fileno(), 0, access=mmap.ACCESS_READ) as s: 114 m = re.search(br"detected repeat execution @ (?P<addr>0x[0-9A-Fa-f]+)", s) 115 if m is not None and "addr" in m.groupdict(): 116 self.fail("detected repeated instructions") 117 118 def test_aarch64_virt_mem_icount(self): 119 """ 120 :avocado: tags=accel:tcg 121 :avocado: tags=arch:aarch64 122 :avocado: tags=machine:virt 123 :avocado: tags=cpu:cortex-a53 124 """ 125 kernel_path = self._grab_aarch64_kernel() 126 kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE + 127 'console=ttyAMA0') 128 console_pattern = 'Kernel panic - not syncing: VFS:' 129 130 plugin_log = tempfile.NamedTemporaryFile(mode="r+t", prefix="plugin", 131 suffix=".log") 132 133 self.run_vm(kernel_path, kernel_command_line, 134 "tests/plugin/libmem.so,inline=true,callback=true", plugin_log.name, 135 console_pattern, 136 args=('-icount', 'shift=1')) 137 138 with plugin_log as lf, \ 139 mmap.mmap(lf.fileno(), 0, access=mmap.ACCESS_READ) as s: 140 m = re.findall(br"mem accesses: (?P<count>\d+)", s) 141 if m is None or len(m) != 2: 142 self.fail("no memory access counts found") 143 else: 144 inline = int(m[0]) 145 callback = int(m[1]) 146 if inline != callback: 147 self.fail("mismatched access counts")