port-xen/38149: i386/XEN3PAE_DOMU fails on x86_64 in HYPERVISOR_mmu_update

[bastian+netbsd.org%spam.blank.eu.org@localhost]

>Number:         38149
>Category:       port-xen
>Synopsis:       i386/XEN3PAE_DOMU fails on x86_64 in HYPERVISOR_mmu_update
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    port-xen-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 03 18:20:02 +0000 2008
>Originator:     Bastian Blank
>Release:        current/20080301
>Organization:
>Environment:
NetBSD 4.99.54 (XEN3PAE_DOMU) #0: Mon Mar  3 17:09:50 CET 2008      
blank%netbsd.test.intern.jura.uni-tuebingen.de@localhost:/data/blank/netbsd/current/result/i386/obj/sys/arch/i386/compile/XEN3PAE_DOMU

>Description:
The i386/pae Xen kernel fails to boot on a x86_64 hypervisor (3.1) with the 
following error:
(XEN) mm.c:694:d12 Bad L3 flags 6

dmesg of the kernel:
total memory = 128 MB
avail memory = 120 MB
mainbus0 (root)
hypervisor0 at mainbus0
vcpu0 at hypervisor0: (uniprocessor)
vcpu0: AMD Dual-Core Opteron (686-class), 2613.39 MHz, id 0x40f13
vcpu0: "Dual-Core AMD Opteron(tm) Processor 2218 HE"
vcpu0: 16 page colors
xenbus0 at hypervisor0: Xen Virtual Bus Interface
xencons0 at hypervisor0: Xen Virtual Console Driver
xencons0: using event channel 2
npx0 at hypervisor0: using exception 16
raidattach: Asked for 8 units
Kernelized RAIDframe activated
xenbus0: using event channel 1
xbd0 at xenbus0 id 1: Xen Virtual Block Device Interface
xennet0 at xenbus0 id 0: Xen Virtual Network Interface
xennet0: MAC address 00:16:3e:73:ed:e3
unknown type console at xenbus0 id 0 not configured
xbd0: 16384 MB, 512 bytes/sect x 33554432 sectors
Searching for RAID components...
unknown type console at xenbus0 id 0 not configured
boot device: xbd0
root on xbd0a dumps on xbd0b
unknown type console at xenbus0 id 0 not configured
mountroot: trying lfs...
mountroot: trying ffs...
root file system type: ffs
warning: no /dev/console
init: copying out path `/sbin/init' 11
xpq_flush_queue: 3 entries
0x000000001bafd000: 0x000000001416c001
0x000000001bafd008: 0x000000001417b001
0x000000001bafd010: 0x000000001417a001
panic: HYPERVISOR_mmu_update failed

Stopped in pid 1.1 (init) at    netbsd:breakpoint+0x4:  popl    %ebp

>How-To-Repeat:

>Fix: