Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
66 lines
2.3 KiB
Python
Executable File
66 lines
2.3 KiB
Python
Executable File
#!/usr/bin/env python3
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2025 Intel Corporation
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#
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# Test for Indirect Target Selection(ITS) mitigation sysfs status.
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import sys, os, re
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this_dir = os.path.dirname(os.path.realpath(__file__))
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sys.path.insert(0, this_dir + '/../../kselftest')
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import ksft
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from common import *
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bug = "indirect_target_selection"
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mitigation = get_sysfs(bug)
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ITS_MITIGATION_ALIGNED_THUNKS = "Mitigation: Aligned branch/return thunks"
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ITS_MITIGATION_RETPOLINE_STUFF = "Mitigation: Retpolines, Stuffing RSB"
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ITS_MITIGATION_VMEXIT_ONLY = "Mitigation: Vulnerable, KVM: Not affected"
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ITS_MITIGATION_VULNERABLE = "Vulnerable"
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def check_mitigation():
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if mitigation == ITS_MITIGATION_ALIGNED_THUNKS:
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if cmdline_has(f'{bug}=stuff') and sysfs_has("spectre_v2", "Retpolines"):
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bug_check_fail(bug, ITS_MITIGATION_ALIGNED_THUNKS, ITS_MITIGATION_RETPOLINE_STUFF)
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return
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if cmdline_has(f'{bug}=vmexit') and cpuinfo_has('its_native_only'):
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bug_check_fail(bug, ITS_MITIGATION_ALIGNED_THUNKS, ITS_MITIGATION_VMEXIT_ONLY)
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return
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bug_check_pass(bug, ITS_MITIGATION_ALIGNED_THUNKS)
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return
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if mitigation == ITS_MITIGATION_RETPOLINE_STUFF:
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if cmdline_has(f'{bug}=stuff') and sysfs_has("spectre_v2", "Retpolines"):
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bug_check_pass(bug, ITS_MITIGATION_RETPOLINE_STUFF)
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return
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if sysfs_has('retbleed', 'Stuffing'):
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bug_check_pass(bug, ITS_MITIGATION_RETPOLINE_STUFF)
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return
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bug_check_fail(bug, ITS_MITIGATION_RETPOLINE_STUFF, ITS_MITIGATION_ALIGNED_THUNKS)
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if mitigation == ITS_MITIGATION_VMEXIT_ONLY:
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if cmdline_has(f'{bug}=vmexit') and cpuinfo_has('its_native_only'):
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bug_check_pass(bug, ITS_MITIGATION_VMEXIT_ONLY)
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return
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bug_check_fail(bug, ITS_MITIGATION_VMEXIT_ONLY, ITS_MITIGATION_ALIGNED_THUNKS)
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if mitigation == ITS_MITIGATION_VULNERABLE:
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if sysfs_has("spectre_v2", "Vulnerable"):
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bug_check_pass(bug, ITS_MITIGATION_VULNERABLE)
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else:
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bug_check_fail(bug, "Mitigation", ITS_MITIGATION_VULNERABLE)
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bug_status_unknown(bug, mitigation)
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return
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ksft.print_header()
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ksft.set_plan(1)
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ksft.print_msg(f'{bug}: {mitigation} ...')
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if not basic_checks_sufficient(bug, mitigation):
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check_mitigation()
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ksft.finished()
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