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| author | Chris Bainbridge <chris.bainbridge@gmail.com> | 2014-03-07 18:40:42 +0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2014-03-20 16:31:54 -0700 |
| commit | 69f2366c9456d0ce784cf5aba87ee77eeadc1d5e (patch) | |
| tree | 3e4405ced0145cbcbbf303106965cad9075cb4a4 /Documentation/kernel-parameters.txt | |
| parent | 8c90487cdc64847b4fdd812ab3047f426fec4d13 (diff) | |
| download | lwn-69f2366c9456d0ce784cf5aba87ee77eeadc1d5e.tar.gz lwn-69f2366c9456d0ce784cf5aba87ee77eeadc1d5e.zip | |
x86, cpu: Add forcepae parameter for booting PAE kernels on PAE-disabled Pentium M
Many Pentium M systems disable PAE but may have a functionally usable PAE
implementation. This adds the "forcepae" parameter which bypasses the boot
check for PAE, and sets the CPU as being PAE capable. Using this parameter
will taint the kernel with TAINT_CPU_OUT_OF_SPEC.
Signed-off-by: Chris Bainbridge <chris.bainbridge@gmail.com>
Link: http://lkml.kernel.org/r/20140307114040.GA4997@localhost
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 7116fda7077f..06600cc9a26c 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1011,6 +1011,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. parameter will force ia64_sal_cache_flush to call ia64_pal_cache_flush instead of SAL_CACHE_FLUSH. + forcepae [X86-32] + Forcefully enable Physical Address Extension (PAE). + Many Pentium M systems disable PAE but may have a + functionally usable PAE implementation. + Warning: use of this parameter will taint the kernel + and may cause unknown problems. + ftrace=[tracer] [FTRACE] will set and start the specified tracer as early as possible in order to facilitate early |