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| author | Pawan Gupta <pawan.kumar.gupta@linux.intel.com> | 2022-11-17 12:19:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-23 09:53:45 +0300 |
| commit | c1493b60fd131c0c1558a8f71192fbebe7ed998f (patch) | |
| tree | 925399232d465ab61762d50cef5df41e2cf1cae3 /Documentation | |
| parent | f1b4cf5ce43f28503ef24d30fdbb9247d141765d (diff) | |
| download | linux-c1493b60fd131c0c1558a8f71192fbebe7ed998f.tar.xz | |
x86/speculation: Add spectre_v2=ibrs option to support Kernel IBRS
commit 7c693f54c873691a4b7da05c7e0f74e67745d144 upstream.
Extend spectre_v2= boot option with Kernel IBRS.
[jpoimboe: no STIBP with IBRS]
Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 6ff8cf136953..68f31b666032 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4389,6 +4389,7 @@ eibrs - enhanced IBRS eibrs,retpoline - enhanced IBRS + Retpolines eibrs,lfence - enhanced IBRS + LFENCE + ibrs - use IBRS to protect kernel Not specifying this option is equivalent to spectre_v2=auto. |