Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early updateucode on Intel's CPU

[H. Peter Anvin]

On 12/11/2012 09:15 AM, Yinghai Lu wrote:
> On Tue, Dec 11, 2012 at 9:06 AM, Borislav Petkov <bp@xxxxxxxxx> wrote:
> > On Tue, Dec 11, 2012 at 09:00:55AM -0800, Yinghai Lu wrote:
> > > ok, then next question is how early it should be.
> > >
> > > before early_cpu_init/early_identify_cpu
> > >
> > > or just before check_bugs/identify_cpu
> >
> > Read the code. It's in x86_64_start_kernel on 64-bit.
>
> No, that is not right place. initrd could be loaded anywhere like way
> high by bootloader.

The more I think about it, the more I think the right answer is the one 
we have pretty stated all along: if using the 64-bit entry point it is 
the responsibility of the boot loader to make sure the kernel, the setup 
data, and the initramfs are all mapped on entry.

	-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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