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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2024-12-02 12:07:08 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-05-18 08:24:11 +0200 |
| commit | ba1d70362658bfe89fba8275bf80782d5a8da433 (patch) | |
| tree | e2d690b59bf8cfcc45cdeb0d457179f755e63e15 /Documentation | |
| parent | 61bed1ddb2127501c0bb4cf967538b556755601b (diff) | |
| download | linux-ba1d70362658bfe89fba8275bf80782d5a8da433.tar.gz linux-ba1d70362658bfe89fba8275bf80782d5a8da433.tar.bz2 linux-ba1d70362658bfe89fba8275bf80782d5a8da433.zip | |
x86/its: Add support for RSB stuffing mitigation
commit facd226f7e0c8ca936ac114aba43cb3e8b94e41e upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -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 30e48bcc18c9..f95734ceb82b 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2070,6 +2070,9 @@ 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 |