2011-04-14 10:34:06

by Stratos Psomadakis

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Subject: Two questions about paravirt boot sequence(head_32.S)

1)I cannot understand why the WEAK entries are required after the
bad_subarch label :/ Any hints?
2)I think that xen doesn't use any more the hardware subarch boot
parameter, and uses a 'different' path/boot sequence, hence the
xen_entry in head_32.S is not needed any more. Am I missing something?

Thanks! :)

--
Stratos Psomadakis
<[email protected]>



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2011-04-14 10:47:30

by Stratos Psomadakis

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Subject: Re: Two questions about paravirt boot sequence(head_32.S)

On 04/14/2011 01:33 PM, Stratos Psomadakis wrote:
> 1)I cannot understand why the WEAK entries are required after the
> bad_subarch label :/ Any hints
ok, the first question is just stupid, sorry for that one... :x

--
Stratos Psomadakis
<[email protected]>

2011-04-15 13:06:25

by Rusty Russell

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Subject: Re: Two questions about paravirt boot sequence(head_32.S)

On Thu, 14 Apr 2011 13:33:51 +0300, Stratos Psomadakis <[email protected]> wrote:
> 2)I think that xen doesn't use any more the hardware subarch boot
> parameter, and uses a 'different' path/boot sequence, hence the
> xen_entry in head_32.S is not needed any more. Am I missing something?

Yep, Xen never actually used it.

Cheers,
Rusty.

2011-04-15 14:15:08

by Stratos Psomadakis

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Subject: Re: Two questions about paravirt boot sequence(head_32.S)

On 04/15/2011 05:08 PM, Konrad Rzeszutek Wilk wrote:
> On Thu, Apr 14, 2011 at 09:40:05PM +0930, Rusty Russell wrote:
>> On Thu, 14 Apr 2011 13:33:51 +0300, Stratos Psomadakis <[email protected]> wrote:
>>> 2)I think that xen doesn't use any more the hardware subarch boot
>>> parameter, and uses a 'different' path/boot sequence, hence the
>>> xen_entry in head_32.S is not needed any more. Am I missing something?
>> Yep, Xen never actually used it.
> Does lguest use it? It looked like a neat idea - what happened?
yeap, afaik, lguest uses the subarch field to jump to its own 'entry
point'...

--
Stratos Psomadakis
<[email protected]>

2011-04-15 14:19:30

by Konrad Rzeszutek Wilk

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Subject: Re: Two questions about paravirt boot sequence(head_32.S)

On Thu, Apr 14, 2011 at 09:40:05PM +0930, Rusty Russell wrote:
> On Thu, 14 Apr 2011 13:33:51 +0300, Stratos Psomadakis <[email protected]> wrote:
> > 2)I think that xen doesn't use any more the hardware subarch boot
> > parameter, and uses a 'different' path/boot sequence, hence the
> > xen_entry in head_32.S is not needed any more. Am I missing something?
>
> Yep, Xen never actually used it.

Does lguest use it? It looked like a neat idea - what happened?