Messages in this thread | | | Date | Sat, 14 Oct 2017 18:37:57 +0300 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCHv2, RFC] x86/boot/compressed/64: Handle 5-level paging boot if kernel is above 4G |
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On Sat, Oct 14, 2017 at 09:33:53AM +0200, Ingo Molnar wrote: > Yeah, so first most of this code should be moved from assembly to C. Any reason > why that cannot be done?
Well, we can move a little bit more code into C, like populating the trampoline page, but I don't the think we can move the rest.
Switching to compatibility mode is too low-level to be written in C.
And we cannot write the trampoline code in C, as it's in 32-bit mode and we wouldn't be able to generate it from C in a sane manner while building 64-bit kernel (we discussed this before).
-- Kirill A. Shutemov
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