x86, cpu: Add forcepae parameter for booting PAE kernels on PAE-disabled Pentium M

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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>

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Chris Bainbridge 2014-03-07 18:40:42 +07:00 • committed by H. Peter Anvin

parent 8c90487cdc

commit 69f2366c94

3 changed files with 46 additions and 0 deletions

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7

Documentation/kernel-parameters.txt

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20

arch/x86/boot/cpucheck.c

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19

arch/x86/kernel/cpu/intel.c

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