Re: port-xen/50446: dom0 kernel panics at boot attaching agp

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

The following reply was made to PR port-xen/50446; it has been noted by GNATS.

From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: port-xen-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
        netbsd-bugs%netbsd.org@localhost
Subject: Re: port-xen/50446: dom0 kernel panics at boot attaching agp
Date: Thu, 19 Nov 2015 09:31:10 +0100

 On Thu, Nov 19, 2015 at 06:15:01AM +0000, Andreas Gustafsson wrote:
 > System: NetBSD
 > Architecture: x86_64
 > Machine: amd64
 > >Description:
 > 
 > I'm trying to test NetBSD 7.0/Xen on a PC with a ASUS P5B-V
 > motherboard.  Since this machine is affected by PR 50060,
 > I have applied the fix for that bug to the 7.0 sources:
 > 
 >    cvs rdiff -u -r1.118 -r1.119 src/sys/dev/pci/agp_i810.c
 > 
 > With that patch, the machine sucessfully boots a non-Xen kernel.
 > However, attempting to boot a dom0 kernel under Xen 4.2.5 results
 > in a panic:
 > 
 >    pchb0 at pci0 dev 0 function 0: vendor 0x8086 product 0x29a0 (rev. 0x02)
 >    agp0 at pchb0: i965-family chipset
 >    xpq_flush_queue: 1 entries (0 successful) on cpu0 (0)
 >    cpu0 (0):
 >      0x000000009d5a2c78: 0x8000000000100017
 >     kpm_pdir[0]: 0xab009027
 >    panic: HYPERVISOR_mmu_update failed, ret: -16
 
 debug messages from the hypervisor would be usefull at this point.
 Unfortunably, I don't know a way to get theses without serial console.
 
 -- 
 Manuel Bouyer <bouyer%antioche.eu.org@localhost>
      NetBSD: 26 ans d'experience feront toujours la difference
 --