diff options
| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2024-12-02 12:07:08 -0800 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2025-05-09 13:22:05 -0700 |
| commit | facd226f7e0c8ca936ac114aba43cb3e8b94e41e (patch) | |
| tree | b2dd9cb6ecfa2b5c0db188ce295ede9e2fe96b69 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | 2665281a07e19550944e8354a2024635a7b2714a (diff) | |
x86/its: Add support for RSB stuffing mitigation
When retpoline mitigation is enabled for spectre-v2, enabling
call-depth-tracking and RSB stuffing also mitigates ITS. Add cmdline option
indirect_target_selection=stuff to allow enabling RSB stuffing mitigation.
When retpoline mitigation is not enabled, =stuff option is ignored, and
default mitigation for ITS is deployed.
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index e70d15095f28..8f75ec177399 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2212,6 +2212,9 @@ mitigation. vmexit: Only deploy mitigation if CPU is affected by guest/host isolation part of ITS. + stuff: Deploy RSB-fill mitigation when retpoline is + also deployed. Otherwise, deploy the default + mitigation. For details see: Documentation/admin-guide/hw-vuln/indirect-target-selection.rst |