Re: [PATCH] rtc: Disable EFI rtc for x86

Pali Rohár
2014-11-11T11:53:17Z

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On Tuesday 11 November 2014 12:38:31 One Thousand Gnomes wrote:
> > > look further into the options I have set in my kernel
> > > build, I may have changed something else without
> > > remembering between booting with and without the CSM
> > > enabled.
> >
> > It could also be that the non-CSM BIOS somehow remaps the
> > CMOS registers.
>
> I don't believe there is anything which prevents the CSM from
> faking a CMOS clock using SMM from whatever is actually in
> the hardware.
>
> Alan

Also in case when we do not know what SMM code is doing...

--
Pali Rohár
pali.rohar@gmail.com

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