Messages in this thread |  | | | Date | Thu, 28 Jun 2012 10:02:12 -0700 | | Subject | Re: [PATCH] efi: add efi_runtime state checking | | From | Olof Johansson <> |
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On Wed, Jun 27, 2012 at 2:52 PM, H. Peter Anvin <hpa@zytor.com> wrote: > On 06/27/2012 02:35 PM, Olof Johansson wrote: >> >> This adds an efi_runtime variable indicating whether the >> efi runtime services are available. The only time they are >> expected to not be available is when a 32-bit kernel has been >> booted using 64-but EFI and vice versa. >> >> It also adds checking to the two locations where functions are >> called; x86 reboot and efivars. >> > > OK, stupid question: > > Why is this different from the efi_enabled variable, or rather: why is it > different from what the efi_enabled variable *should* be? If runtime > services aren't available the only "EFI" that is available to the kernel are > the data structures passed in, and those can be checked directly...
Excellent question, and I think it would work to turn off efi_enabled towards the end of setup_arch() for non-native boots. That'd solve all these problems, I believe.
I'll try it out and revise this patch. It might take me a day or two to get cycles for it.
-Olof -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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