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| author | Borislav Petkov (AMD) <bp@alien8.de> | 2024-09-11 10:53:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-10 16:03:21 +0200 |
| commit | 90293047df18caf7ed0fe566d89af0720f2dc98a (patch) | |
| tree | 0d443849a3a3b82fc711b9ab9fa15c6cde44a7c7 /Documentation | |
| parent | 2b6a5fbe9dc1842e3485557a057c8e6311b6fd72 (diff) | |
| download | linux-90293047df18caf7ed0fe566d89af0720f2dc98a.tar.gz linux-90293047df18caf7ed0fe566d89af0720f2dc98a.tar.bz2 linux-90293047df18caf7ed0fe566d89af0720f2dc98a.zip | |
x86/bugs: Add a Transient Scheduler Attacks mitigation
Commit d8010d4ba43e9f790925375a7de100604a5e2dba upstream.
Add the required features detection glue to bugs.c et all in order to
support the TSA mitigation.
Co-developed-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-system-cpu | 1 | ||||
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu index 0426ec112155..868ec736a9d2 100644 --- a/Documentation/ABI/testing/sysfs-devices-system-cpu +++ b/Documentation/ABI/testing/sysfs-devices-system-cpu @@ -526,6 +526,7 @@ What: /sys/devices/system/cpu/vulnerabilities /sys/devices/system/cpu/vulnerabilities/spectre_v1 /sys/devices/system/cpu/vulnerabilities/spectre_v2 /sys/devices/system/cpu/vulnerabilities/srbds + /sys/devices/system/cpu/vulnerabilities/tsa /sys/devices/system/cpu/vulnerabilities/tsx_async_abort Date: January 2018 Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index f95734ceb82b..bcfa49019c3f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6645,6 +6645,19 @@ If not specified, "default" is used. In this case, the RNG's choice is left to each individual trust source. + tsa= [X86] Control mitigation for Transient Scheduler + Attacks on AMD CPUs. Search the following in your + favourite search engine for more details: + + "Technical guidance for mitigating transient scheduler + attacks". + + off - disable the mitigation + on - enable the mitigation (default) + user - mitigate only user/kernel transitions + vm - mitigate only guest/host transitions + + tsc= Disable clocksource stability checks for TSC. Format: <string> [x86] reliable: mark tsc clocksource as reliable, this |