Messages in this thread | | | Date | Wed, 12 Dec 2012 09:43:53 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU |
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On 12/12/2012 05:38 AM, Borislav Petkov wrote: > > We completely lost level3_ident_pgt, causing: > > arch/x86/built-in.o: In function `setup_real_mode': > /home/boris/kernel/linux-2.6/arch/x86/realmode/init.c:81: undefined reference to `level3_ident_pgt' > make: *** [vmlinux] Error 1 >
> > You still need that NEXT_PAGE(level1_fixmap_pgt) thing: > > arch/x86/kernel/head_64.o: In function `level2_fixmap_pgt': > (.data+0x2fd0): undefined reference to `level1_fixmap_pgt' >
Yes, I said it wasn't a complete patch. There are bits missing, and some of them need restructuring. The ident page table in the trampoline should be handled by mirroring the kernel ident page tables instead, for example -- right now that is completely broken if the kernel lives above the 512 GiB mark.
-hpa
-- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.
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