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Re: Problems booting netbsd DOM0 (and domU!)



At Mon, 01 Jan 2024 15:33:16 -0500, Greg Troxel <gdt%lexort.com@localhost> wrote:
Subject: Re: Problems booting netbsd DOM0 (and domU!)
>
> "Greg A. Woods" <woods%planix.ca@localhost> writes:
>
> > I can now confirm that "dom0=pv,msr-relaxed=1" on the Xen command line in
> > /boot.cfg will allow an older unpatched NetBSD XEN3_DOM0 kernel to boot!
>
> For the HOWTO, is the dom0=pv part necessary?  I would think this is the
> default.

According to the (not installed) "xen-command-line" document "pv" is the
default IFF `CONFIG_PV` _and_ `CONFIG_HVM` are both compiled in which is
presumably always true for xenkernel on NetBSD x86 and x86_x64(amd64).

> I think the text to be added is:
>
>   When the dom0 kernel is NetBSD 8 and earlier, and NetBSD 9 before
>   2021-04-17 (9.3 is ok), Xen 4.15 and later require
>   "dom0=msr-relaxed=1" on the boof.cfg line.  (See
>   /src/sys/arch/x86/x86/pmap.c revision 1.410.)
>
> Is that right?

That sounds OK to me!

--
					Greg A. Woods <gwoods%acm.org@localhost>

Kelowna, BC     +1 250 762-7675           RoboHack <woods%robohack.ca@localhost>
Planix, Inc. <woods%planix.com@localhost>     Avoncote Farms <woods%avoncote.ca@localhost>

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