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| author | Andy Lutomirski <luto@kernel.org> | 2019-05-08 12:02:31 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-06-22 11:38:56 +0200 |
| commit | 2032f1f96ee0da600633c6c627b9c0a2e0f8b8a6 (patch) | |
| tree | 7f52b8bf09a8120dac9635197be096a93eed110c /Documentation | |
| parent | selftests/x86/fsgsbase: Test ptracer-induced GSBASE write with FSGSBASE (diff) | |
| download | linux-2032f1f96ee0da600633c6c627b9c0a2e0f8b8a6.tar.xz linux-2032f1f96ee0da600633c6c627b9c0a2e0f8b8a6.zip | |
x86/cpu: Enable FSGSBASE on 64bit by default and add a chicken bit
Now that FSGSBASE is fully supported, remove unsafe_fsgsbase, enable
FSGSBASE by default, and add nofsgsbase to disable it.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Link: https://lkml.kernel.org/r/1557309753-24073-17-git-send-email-chang.seok.bae@intel.com
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index b0fa5273b0fc..35bc3c3574c6 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2857,8 +2857,7 @@ no5lvl [X86-64] Disable 5-level paging mode. Forces kernel to use 4-level paging instead. - unsafe_fsgsbase [X86] Allow FSGSBASE instructions. This will be - replaced with a nofsgsbase flag. + nofsgsbase [X86] Disables FSGSBASE instructions. no_console_suspend [HW] Never suspend the console |