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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 08:24:59 +0200 |
| commit | 9f132c0397df9cc073172560b6e4c975a4746c0e (patch) | |
| tree | 9c27085aead98ef6f376282fd195a16d5ca0cd7a /Documentation/admin-guide | |
| parent | 4dc1902fdee72dd9474c9878c7153cf3769f8294 (diff) | |
| download | linux-9f132c0397df9cc073172560b6e4c975a4746c0e.tar.gz linux-9f132c0397df9cc073172560b6e4c975a4746c0e.tar.bz2 linux-9f132c0397df9cc073172560b6e4c975a4746c0e.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/admin-guide')
| -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 bb3bb8314704..e691f75c97e7 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2159,6 +2159,9 @@ 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 |