On Tue, 2013-12-10 at 15:20 -0800, H. Peter Anvin wrote: > On 12/10/2013 02:58 PM, Matthew Garrett wrote: > > EFI is preferable to PNP in that it gives us a timezone, and Windows > > certainly calls the EFI time functions. *However*, it doesn't appear to > > do so once the system is booted. So we probably want to call it in the > > boot stub and find some way to pass the timezone information up to the > > kernel, and then spend some more time instrumenting Windows to figure > > out how it makes time calls. > > TAD would also give us the timezone. I'm not sure how you can > realistically only use the time function during boot, however, unless > you inherently assume it is coherent with the hardware RTC, since you > wouldn't be able to set it.
If we can verify that Windows actually uses TAD then I'd agree it's preferable to EFI, but if we can't then I wouldn't be so sure. I'll redo my Windows instrumentation and figure out under which circumstances it's calling the time functions. -- Matthew Garrett <[email protected]> N�����r��y����b�X��ǧv�^�){.n�+����{�y����^n�r���z���h�����&�� �G���h�(�階�ݢj"���m������z�ޖ���f���h���~�m�
