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qemu can no longer boot NetBSD/sparc
Booting NetBSD/sparc in qemu no longer works. It broke between qemu version 5.0.0 and 5.1.0, and a bisection identified the following as the offending commit:
[5d971f9e672507210e77d020d89e0e89165c8fc9] memory: Revert "memory: accept mismatching sizes in memory_region_access_valid"
It's still broken as of 7fd51e68c34fcefdb4d6fd646ed3346f780f89f4.
To reproduce, run
wget http://ftp.netbsd.org/pub/NetBSD/NetBSD-9.0/images/NetBSD-9.0-sparc.iso
qemu-system-sparc -nographic -cdrom NetBSD-9.0-sparc.iso -boot d
The expected behavior is that the guest boots to the prompt
Installation medium to load the additional utilities from:
The observed behavior is a panic:
[ 1.0000050] system[0]: trap 0x29: pc=0xf0046b14 sfsr=0xb6 sfva=0x54000000
[ 1.0000050] cpu0: data fault: pc=0xf0046b14 addr=0x54000000 sfsr=0xb6<PERR=0x0,LVL=0x0,AT=0x5,FT=0x5,FAV,OW>
[ 1.0000050] panic: kernel fault
[ 1.0000050] halted
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