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| author | Xin Li <xin3.li@intel.com> | 2023-12-05 02:49:57 -0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-01-30 18:19:20 +0100 |
| commit | 3810da12710aaa05c6101418675c923642a80c0c (patch) | |
| tree | d1f3d28989faee9e2d89826851476080f9f5a4b1 /Documentation/admin-guide/kernel-parameters.txt | |
| parent | e554a8ca49d6d6d782f546ae4d7f036946e7dd87 (diff) | |
| download | linux-3810da12710aaa05c6101418675c923642a80c0c.tar.gz linux-3810da12710aaa05c6101418675c923642a80c0c.tar.bz2 linux-3810da12710aaa05c6101418675c923642a80c0c.zip | |
x86/fred: Add a fred= cmdline param
Let command line option "fred" accept multiple options to make it
easier to tweak its behavior.
Currently, two options 'on' and 'off' are allowed, and the default
behavior is to disable FRED. To enable FRED, append "fred=on" to the
kernel command line.
[ bp: Use cpu_feature_enabled(), touch ups. ]
Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Shan Kang <shan.kang@intel.com>
Link: https://lore.kernel.org/r/20231205105030.8698-9-xin3.li@intel.com
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 31b3a25680d0..d6ea4f42127c 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1539,6 +1539,12 @@ Warning: use of this parameter will taint the kernel and may cause unknown problems. + fred= [X86-64] + Enable/disable Flexible Return and Event Delivery. + Format: { on | off } + on: enable FRED when it's present. + off: disable FRED, the default setting. + ftrace=[tracer] [FTRACE] will set and start the specified tracer as early as possible in order to facilitate early |