tools/testing/selftests/x86/bugs/its_permutations.py

Source file repositories/reference/linux-study-clean/tools/testing/selftests/x86/bugs/its_permutations.py

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/x86/bugs/its_permutations.py
Extension
.py
Size
3218 bytes
Lines
110
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/usr/bin/env python3
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2025 Intel Corporation
#
# Test for indirect target selection (ITS) cmdline permutations with other bugs
# like spectre_v2 and retbleed.

import os, sys, subprocess, itertools, re, shutil

test_dir = os.path.dirname(os.path.realpath(__file__))
sys.path.insert(0, test_dir + '/../../kselftest')
import ksft
import common as c

bug = "indirect_target_selection"
mitigation = c.get_sysfs(bug)

if not mitigation or "Not affected" in mitigation:
    ksft.test_result_skip("Skipping its_permutations.py: not applicable")
    ksft.finished()

if shutil.which('vng') is None:
    ksft.test_result_skip("Skipping its_permutations.py: virtme-ng ('vng') not found in PATH.")
    ksft.finished()

TEST = f"{test_dir}/its_sysfs.py"
default_kparam = ['clearcpuid=hypervisor', 'panic=5', 'panic_on_warn=1', 'oops=panic', 'nmi_watchdog=1', 'hung_task_panic=1']

DEBUG = " -v "

# Install dependencies
# https://github.com/arighi/virtme-ng
# apt install virtme-ng
BOOT_CMD = f"vng --run {test_dir}/../../../../../arch/x86/boot/bzImage "
#BOOT_CMD += DEBUG

bug = "indirect_target_selection"

input_options = {
    'indirect_target_selection'     : ['off', 'on', 'stuff', 'vmexit'],
    'retbleed'                      : ['off', 'stuff', 'auto'],
    'spectre_v2'                    : ['off', 'on', 'eibrs', 'retpoline', 'ibrs', 'eibrs,retpoline'],
}

def pretty_print(output):
    OKBLUE = '\033[94m'
    OKGREEN = '\033[92m'
    WARNING = '\033[93m'
    FAIL = '\033[91m'
    ENDC = '\033[0m'
    BOLD = '\033[1m'

    # Define patterns and their corresponding colors
    patterns = {
        r"^ok \d+": OKGREEN,
        r"^not ok \d+": FAIL,
        r"^# Testing .*": OKBLUE,
        r"^# Found: .*": WARNING,
        r"^# Totals: .*": BOLD,
        r"pass:([1-9]\d*)": OKGREEN,
        r"fail:([1-9]\d*)": FAIL,
        r"skip:([1-9]\d*)": WARNING,
    }

    # Apply colors based on patterns
    for pattern, color in patterns.items():
        output = re.sub(pattern, lambda match: f"{color}{match.group(0)}{ENDC}", output, flags=re.MULTILINE)

    print(output)

Annotation

Implementation Notes