| commit | 99fb4d349db7e7dacb2099c5cc320a9e2d31c1ef | |
| author | Ingo Molnar <mingo@elte.hu> | |
| Mon, 26 Jan 2009 03:30:41 +0000 (26 04:30 +0100) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Mon, 26 Jan 2009 11:36:24 +0000 (26 12:36 +0100) | ||
| tree | 62d62cb8f17962e9318177240c6154a4ca708077 | treesnapshot (tar.gz zip) |
| parent | ef5fa0ab24b87646c7bc98645acbb4b51fc2acd4 | commitdiff |
x86: unmask CPUID levels on Intel CPUs, fix
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>
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>
| arch/x86/kernel/cpu/intel.c | diffblobblamehistory |