Messages in this thread | | | Subject | Re: [PATCH v2 08/20] x86, ACPI: Find acpi tables in initrd early from head_32.S/head64.c | From | "H. Peter Anvin" <> | Date | Sun, 10 Mar 2013 10:42:36 -0700 |
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There is no 64-bit flat mode. We use a #PF handler to emulate one by creating page tables on the fly.
Yinghai Lu <yinghai@kernel.org> wrote:
>On Sun, Mar 10, 2013 at 3:25 AM, Pekka Enberg <penberg@kernel.org> >wrote: >> >> What is preventing us from making the 64-bit variant also work in >flat >> mode to make the code consistent and not hiding the differences under >> the rug? What am I missing here? > >Boot loader could start kernel from 64bit directly from >from arch/x86/boot/compressed/head_64.s::startup_64. > >initrd can be loaded by 64bit bootloader above 4G. > >So we even switch back to 32bit flat mode, we still can not access >those initrd >directly. > >Thanks > >Yinghai
-- Sent from my mobile phone. Please excuse brevity and lack of formatting.
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