Re: Problems booting NetBSD/Xen on Intel NUC 12 Extreme w/ i9-12900

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Thu, May 11, 2023 at 02:27:51PM -0400, Brad Spencer wrote:
> Manuel Bouyer <bouyer%antioche.eu.org@localhost> writes:
> 
> > On Thu, May 11, 2023 at 12:27:03PM +0200, Johan Stenstam wrote:
> >> Hi agin,
> >> 
> >> > On 11 May 2023, at 08:54, Manuel Bouyer <bouyer%antioche.eu.org@localhost> wrote:
> >> > 
> >> > On Wed, May 10, 2023 at 10:20:49PM +0200, Johan Stenstam wrote:
> >> >> 
> >> >>> On Wed, May 10, 2023 at 03:04:37PM -0400, Greg Troxel wrote:
> >> >>> 
> >> >>> AFAIK NetBSD/xen still need separate modules (and I don't think it's going
> >> >>> to change). But as I don't use modules I don't know how they're supposed
> >> >>> to be built.
> >> >> 
> >> >> Well, I have them (copied from /stand/amd64/ to /stand/amd64-xen/), so either way this should not be the issue.
> >> > 
> >> > It is, because modules from /stand/amd64/ and not compatible with
> >> > /stand/amd64-xen/ (the ABI is not the same)
> >> 
> >> Yes, I?ve found that out now. However, note that one of the last messages from the successful boot of XEN3_DOM0 using the serial console was:
> >> 
> >> kern.module.path=/stand/amd64/10.0/modules
> >> 
> >> So it seems that there is some confusion in the XEN3_DOM0 kernel about the correct path for locating modules.
> >
> > Yes, looks like something is wrong here
> >
> 
> [snip]
> 
> My understanding, also born out by real installs, indicates that prior
> to 10.x and -current there was separate modules directories for Xen, the
> amd64-xen thing.  At 10.x and after, however, that was eliminated and
> there is only one.  I have a pure PV 10.x guest that appears to work
> just fine with modules pointing at /stand/amd64/10.0/modules.

There is still lots of code and constant conditional on XENPV in
arch/x86/include/ and arch/amd64/include/. As long as you modules don't depend
on theses it's safe. But as these can be #included indirectly it's hard
to tell what a module uses or doesn't use ...

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--