Re: Multiboot for amd64?

[Paul Goyette <paul%whooppee.com@localhost>]

On Fri, 8 Jan 2010, Grégoire Sutre wrote:

> Steven Bellovin wrote:
>
> > > There is multiboot support for i386, which is great.  But i386 seems to be 
> > > the only architecture with multiboot support.  Are there plans to add 
> > > multiboot support to amd64?
> > I didn't know it was nominally unsupported;
>
> I may be wrong, but this is the impression I get from a grep on the -current 
> sources (in sys/arch).  Regarding amd64, I could not find the multiboot magic 
> number in the 8192 first bytes of the GENERIC kernel, so I'm pretty sure that 
> this one is not multiboot compliant.
>
>
> > it's been working very well for me on 5.0.x for several months, in a Xen 
> configuration:
> > menu=Xen (256MB):load /netbsd-DOM0;multiboot /xen.gz dom0_mem=256M 
> > console=com1 com1=9600,8n1
>
> Is this on i386?

"options MULTIBOOT" is enabled by default in i386 GENERIC kernels.  It 
is not on by default in amd64.

> Thanks,
>
> Grégoire

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