Re: Xen 4.18.4_20241221nb0 panic (Was: Re: EFI and Xen)

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

On Fri, May 23, 2025 at 04:19:46PM -0400, Chuck Zmudzinski wrote:
> On 5/23/2025 4:15 PM, Manuel Bouyer wrote:
> > On Fri, May 23, 2025 at 04:13:01PM -0400, Chuck Zmudzinski wrote:
> >> [...]
> >> I needed to acquire a PCI serial card to get some useful messages because the motherboard does not have a built-in serial port.
> >> 
> >> It appears Xen 4.18.4_20241221nb0 from pkgsrc crashes on my box before the NetBSD dom0 starts:
> >> 
> >> -------- snip ------
> >> (XEN) Xen call trace:
> >> (XEN)    [<ffff82d040261a00>] R intel_iommu_enable_eim+0/0xe0
> >> (XEN)    [<ffff82d040268ac4>] S iommu_enable_x2apic+0x24/0x70
> >> (XEN)    [<ffff82d0403f579d>] S x2apic_bsp_setup+0x12d/0x220
> >> (XEN)    [<ffff82d0403ff0e4>] S __start_xen+0x1af4/0x2620
> >> (XEN)    [<ffff82d040204434>] S __high_start+0x94/0xa0
> >> (XEN) 
> >> (XEN) 
> >> (XEN) ****************************************
> >> (XEN) Panic on CPU 0:
> >> (XEN) CONTROL-FLOW PROTECTION FAULT: #CP[0003] endbranch
> >> (XEN) ****************************************
> >> (XEN) 
> >> (XEN) Reboot in five seconds...
> >> (XEN) Resetting with ACPI MEMORY or I/O RESET_REG.
> >> -------- end messages ------
> > 
> > Do you have a way to disable x2apic in the BIOS ?
> 
> I can check later this evening but I have an appointment now.
> 
> > 
> >> 
> >> Please note only the pkgsrc version of Xen crashes. I can boot Xen with no problems using Xen packaged by Fedora, AlmaLinux, etc. on this box.
> > 
> > Is it the same Xen version ?
> 
> More or less - I know Xen 4.18.4 worked, now Fedora is at Xen 4.19.

strange; maybe they had a patch.
Note that I just updated xen in pkgsrc to 4.18.5

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