tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/usr/bin/env python3
2# SPDX-License-Identifier: GPL-2.0
3#
4# Copyright (c) 2025 Intel Corporation
5#
6# Test for indirect target selection (ITS) cmdline permutations with other bugs
7# like spectre_v2 and retbleed.
8
9import os, sys, subprocess, itertools, re, shutil
10
11test_dir = os.path.dirname(os.path.realpath(__file__))
12sys.path.insert(0, test_dir + '/../../kselftest')
13import ksft
14import common as c
15
16bug = "indirect_target_selection"
17mitigation = c.get_sysfs(bug)
18
19if not mitigation or "Not affected" in mitigation:
20 ksft.test_result_skip("Skipping its_permutations.py: not applicable")
21 ksft.finished()
22
23if shutil.which('vng') is None:
24 ksft.test_result_skip("Skipping its_permutations.py: virtme-ng ('vng') not found in PATH.")
25 ksft.finished()
26
27TEST = f"{test_dir}/its_sysfs.py"
28default_kparam = ['clearcpuid=hypervisor', 'panic=5', 'panic_on_warn=1', 'oops=panic', 'nmi_watchdog=1', 'hung_task_panic=1']
29
30DEBUG = " -v "
31
32# Install dependencies
33# https://github.com/arighi/virtme-ng
34# apt install virtme-ng
35BOOT_CMD = f"vng --run {test_dir}/../../../../../arch/x86/boot/bzImage "
36#BOOT_CMD += DEBUG
37
38bug = "indirect_target_selection"
39
40input_options = {
41 'indirect_target_selection' : ['off', 'on', 'stuff', 'vmexit'],
42 'retbleed' : ['off', 'stuff', 'auto'],
43 'spectre_v2' : ['off', 'on', 'eibrs', 'retpoline', 'ibrs', 'eibrs,retpoline'],
44}
45
46def pretty_print(output):
47 OKBLUE = '\033[94m'
48 OKGREEN = '\033[92m'
49 WARNING = '\033[93m'
50 FAIL = '\033[91m'
51 ENDC = '\033[0m'
52 BOLD = '\033[1m'
53
54 # Define patterns and their corresponding colors
55 patterns = {
56 r"^ok \d+": OKGREEN,
57 r"^not ok \d+": FAIL,
58 r"^# Testing .*": OKBLUE,
59 r"^# Found: .*": WARNING,
60 r"^# Totals: .*": BOLD,
61 r"pass:([1-9]\d*)": OKGREEN,
62 r"fail:([1-9]\d*)": FAIL,
63 r"skip:([1-9]\d*)": WARNING,
64 }
65
66 # Apply colors based on patterns
67 for pattern, color in patterns.items():
68 output = re.sub(pattern, lambda match: f"{color}{match.group(0)}{ENDC}", output, flags=re.MULTILINE)
69
70 print(output)
71
72combinations = list(itertools.product(*input_options.values()))
73ksft.print_header()
74ksft.set_plan(len(combinations))
75
76logs = ""
77
78for combination in combinations:
79 append = ""
80 log = ""
81 for p in default_kparam:
82 append += f' --append={p}'
83 command = BOOT_CMD + append
84 test_params = ""
85 for i, key in enumerate(input_options.keys()):
86 param = f'{key}={combination[i]}'
87 test_params += f' {param}'
88 command += f" --append={param}"
89 command += f" -- {TEST}"
90 test_name = f"{bug} {test_params}"
91 pretty_print(f'# Testing {test_name}')
92 t = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
93 t.wait()
94 output, _ = t.communicate()
95 if t.returncode == 0:
96 ksft.test_result_pass(test_name)
97 else:
98 ksft.test_result_fail(test_name)
99 output = output.decode()
100 log += f" {output}"
101 pretty_print(log)
102 logs += output + "\n"
103
104# Optionally use tappy to parse the output
105# apt install python3-tappy
106with open("logs.txt", "w") as f:
107 f.write(logs)
108
109ksft.finished()