port-macppc/59331: macppc now panics early in QEMU, regression since 9.x

[nia%pkgsrc.org@localhost]

>Number:         59331
>Category:       port-macppc
>Synopsis:       macppc now panics early in QEMU, regression since 9.x
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-macppc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 19 17:45:00 +0000 2025
>Originator:     nia
>Release:        10.0, 10.1...
>Organization:
The NetBSD Foundation
>Environment:
qemu-system-ppc mac99 machine
>Description:
I am using my normal scripts to create an image for QEMU:

https://github.com/alarixnia/mkimg-netbsd

However, since 10.0, macppc now panics on boot:

[   1.0000000] NetBSD 10.1 (GENERIC) #0: Mon Dec 16 13:08:11 UTC 2024                                                 
[   1.0000000]  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/macppc/compile/GENERIC                                   
[   1.0000000] total memory = 512 MB                                                                                  
[   1.0000000] avail memory = 474 MB                                                                                  
[   1.0000000] trap: kernel read DSI trap @ 0x1fc5a62c by 0xfff0bedc (DSISR 0x40000000, err=14), lr 0xfff0bed8
[   1.0000000] panic: trap                                                                                            
[   1.0000000] cpu0: Begin traceback...                                                                               
[   1.0000000] 0xfffffce0: at vpanic+0x158                                                                            
[   1.0000000] 0xfffffd10: at panic+0x50                                                                              
[   1.0000000] 0xfffffd50: at trap+0x3a8                                                                              
[   1.0000000] 0xfffffe00: kernel DSI read trap @ 0x1fc5a62c by 0xfff0bedc: srr1=0x2030                              
[   1.0000000]             r1=0xfffffed0 cr=0x20000828 xer=0x20000000 ctr=0xfff0bec8 dsisr=0x40000000                 
[   1.0000000] 0xfffffed0: at 0xfffa6024                                                                              
[   1.0000000] 0xfffffee0: at 0xfff0cb3c                                                                              
[   1.0000000] 0xffffff30: at 0xfff0d1b4                                                                              
[   1.0000000] 0xffffff40: at 0xfff0e7e8                                                                              
[   1.0000000] 0xffffff70: at 0xfff02688                                                                              
[   1.0000000] cpu0: End traceback...
>How-To-Repeat:

>Fix:
I wish.