Re: [GIT PULL] x86 setup: correct booting on 486 (revised)

Jeremy Fitzhardinge
2007-11-06T01:00:59Z

H. Peter Anvin wrote:
> Jeremy Fitzhardinge wrote:
>> H. Peter Anvin wrote:
>>> Nailing down the interface as hard as possible is a good idea, to
>>> avoid tying your hands for the future.
>>
>> Erm, I guess I see what you mean, but it comes to the effect of tying
>> your hands now in a specific way, rather than having them tied in an
>> unknown way later on...
>
> Sort of. The problem is you can frequently not
>
>> But I hadn't noticed the 32-bit boot protocol spec go in. Unfortunately
>> it isn't useful for booting a pv Xen guest; I just mailed my
>> comments. I hope we can iterate this to something more generally
>> useful before
>> getting too wedded to the current protocol.
>
> I'm not so sure about that. Xen PV is rather fundamentally a
> different beast, hence the platform field recently added to the protocol.

Hm, OK. So make this predicated on "hardware subarchitecture == PC".

>
> This is addressed by the "don't reload segments" bit in LOADFLAGS.

OK.

J