[Qemu-devel] [Bug 623852] Re: PPC emulation loops on booting a FreeBSD kernel

[Murilo Opsfelder Araújo]

Hi, Nigel.

Support for powerpc64 is available since FreeBSD 9.0-RELEASE, I think.
FreeBSD 11.2-RC2 boots fine in QEMU (at commit 46012db666990ff2eed1d3dc)
running on an x86 host with accel=tcg.  Below are the steps I have
followed to boot it.

Build QEMU:

$ mkdir build && cd build
$ ../configure --target-list=ppc64-softmmu
$ make -j$(nproc)

Boot FreeBSD:

$ wget 
http://ftp.freebsd.org/pub/FreeBSD/releases/powerpc/powerpc64/ISO-IMAGES/11.2/FreeBSD-11.2-RC2-powerpc-powerpc64-disc1.iso
$ ./qemu-img create -f qcow2 freebsd.qcow2 10G
$ ./ppc64-softmmu/qemu-system-ppc64 -name freebsd -machine 
pseries,accel=tcg,usb=off -m 1024 -realtime mlock=off -smp 
4,sockets=4,cores=1,threads=1 -nographic -no-user-config -nodefaults -rtc 
base=utc -no-shutdown -boot strict=on -device 
pci-bridge,chassis_nr=1,id=pci.1,bus=pci.0,addr=0x1 -device 
pci-ohci,id=usb,bus=pci.0,addr=0x2 -device spapr-vscsi,id=scsi0,reg=0x2000 
-drive file=freebsd.qcow2,format=qcow2,if=none,id=drive-scsi0-0-0-0 -device 
scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=1
 -drive 
file=FreeBSD-11.2-RC2-powerpc-powerpc64-disc1.iso,format=raw,if=none,id=drive-scsi0-0-1-0,readonly=on
 -device 
scsi-cd,bus=scsi0.0,channel=0,scsi-id=1,lun=0,drive=drive-scsi0-0-1-0,id=scsi0-0-1-0,bootindex=2
 -netdev user,id=hostnet0 -device 
spapr-vlan,netdev=hostnet0,id=net0,mac=4c:45:42:45:01:18,reg=0x1000 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x4 -msg timestamp=on -serial 
mon:stdio

Since this bug is almost 8 years old and FreeBSD powerpc64 seems to be
working just fine, I will close it.  Feel free to submit a new one if
needed.

Cheers
Murilo

** Changed in: qemu
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/623852

Title:
  PPC emulation loops on booting a FreeBSD kernel

Status in QEMU:
  Invalid

Bug description:
  Has anyone tried booting FreeBSD8.1-ppc under QEMU (Linux x86_64 host;
  PPC guest)?  I can get Linux/PPC to run fine, and FreeBSD8.1-i386 as
  well; but there seems to be a problem with whatever the FreeBSD8.1
  kernel does, that QEMU's PPC emulation can't handle.

  I am using the latest version of QEMU from GIT as of 25/8/10.  I don't
  know how to get a "git commit hash", so I can't quote it.

  The kernel starts OK then loops after "Kernel entry at 0x100100 ...".

  The command I am running is

  qemu-system-ppc -cdrom FreeBSD-8.1-RELEASE-powerpc-disc1.iso -hda
  freebsd8.1-ppc -m 94 -boot d"

  I obtained the kernel from
  ftp://ftp.freebsd.org/pub/FreeBSD/releases/powerpc/ISO-
  IMAGES/8.1/FreeBSD-8.1-RELEASE-powerpc-disc1.iso.

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