https://github.com/torvalds/linux
Revision 99fb4d349db7e7dacb2099c5cc320a9e2d31c1ef authored by Ingo Molnar on 26 January 2009, 03:30:41 UTC, committed by Ingo Molnar on 26 January 2009, 11:36:24 UTC
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>
1 parent ef5fa0a
History
Tip revision: 99fb4d349db7e7dacb2099c5cc320a9e2d31c1ef authored by Ingo Molnar on 26 January 2009, 03:30:41 UTC
x86: unmask CPUID levels on Intel CPUs, fix
Tip revision: 99fb4d3
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