EFI runtime-services on x86_64

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From: Bjorn Helgaas
Date: Friday, July 30, 2010 - 1:58 pm

Hello Feng,

Can you educate me about your commit 772be899bc, "86: Make EFI RTC
function depend on 32bit again"?

It adds "#ifdef CONFIG_X86_32" to avoid using efi_get_time() and
efi_set_rtc_mmss(), but there's no explanation of *why* those services
only work on 32-bit.

Is this an EFI spec limitation?  Do the other EFI runtime services
work on 64-bit, since you didn't touch them?  Or do we just not use
any of the others?

Is this something that can be fixed, so we *could* use efi_get_time()
on 64-bit if we did some work?  What would need to be done?

Bjorn
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Messages in current thread:
EFI runtime-services on x86_64, Bjorn Helgaas, (Fri Jul 30, 1:58 pm)
Re: EFI runtime-services on x86_64, Feng Tang, (Sun Aug 1, 7:35 pm)
Re: EFI runtime-services on x86_64, Huang Ying, (Sun Aug 1, 7:42 pm)
Re: EFI runtime-services on x86_64, Eric W. Biederman, (Tue Aug 3, 2:45 pm)
Re: EFI runtime-services on x86_64, Matthew Garrett, (Tue Aug 3, 2:53 pm)
Re: EFI runtime-services on x86_64, Eric W. Biederman, (Tue Aug 3, 2:58 pm)
Re: EFI runtime-services on x86_64, Matthew Garrett, (Tue Aug 3, 3:15 pm)