x86: unmask CPUID levels on Intel CPUs, fix

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Impact: fix boot hang on pre-model-15 Intel CPUs

rdmsrl_safe() does not work in very early bootup code yet, because we
dont have the pagefault handler installed yet so exception section
does not get parsed. rdmsr_safe() will just crash and hang the bootup.

So limit the MSR_IA32_MISC_ENABLE MSR read to those CPU types that
support it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Ingo Molnar 2009-01-26 04:30:41 +01:00

parent ef5fa0ab24

commit 99fb4d349d

1 changed files with 11 additions and 8 deletions

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arch/x86/kernel/cpu/intel.c

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