Building powerpc (32-bit) packages on amd64

[canardo909]

I tried to cross-compile as indicated.
On a linux machine with 16GB ram (ubuntu 18.04 LTS with Qemu 2.11.1), I
run FreeBSD ppc64 12.1 in Qemu

Command line
sudo qemu-system-ppc64 -M pseries-2.12-sxxm -smp 2 -mem-path
/dev/hugepages -drive file=qfreebsdppc64.qcow -m 12G
does not work, and I get the following errors (and Qemu does not start)

qemu-system-ppc64: unable to map backing store for guest RAM: Cannot
allocate memory
qemu-system-ppc64: Requested safe bounds check capability level not
supported by tcg, try a different value for cap-sbbc


After searching on the web, I found the following arguments to add
-machine cap-sbbc=broken,cap-ibs=broken

The full command line I'm using is then
sudo qemu-system-ppc64 -M pseries-2.12-sxxm -smp 2 -mem-path
/dev/hugepages -drive file=qfreebsdppc64.qcow -m 12G -machine
cap-sbbc=broken,cap-ibs=broken

I still get the error
qemu-system-ppc64: unable to map backing store for guest RAM: Cannot
allocate memory
but FreeBSD ppc64 runs.

problem is : it is REALLY slow, like 10 times slower than my Powerbook G4

So I tried the following start command (without hugepage, and only 2GB ram)
sudo qemu-system-ppc64 -M pseries-2.12-sxxm -smp 2 -drive
file=qfreebsdppc64.qcow -m 2G -machine cap-sbbc=broken,cap-ibs=broken

It runs, but also REALLY slow.

Is there something I'm missing in my settings ?
Should I use a more recent version of Qemu ?



> Date: Sat, 9 Nov 2019 01:25:35 -0500
> From: Daniel Benjamin Miller <dbmiller at dbmiller.org>
> To: freebsd-ppc at freebsd.org
> Subject: Building powerpc (32-bit) packages on amd64

>
> 1. Run a FreeBSD-CURRENT (powerpc64) virtual machine under Linux, using
> the command sudo qemu-system-ppc64 -M pseries-2.12-sxxm -smp 2 -mem-path
> /dev/hugepages -drive file=bsd.img -m 12G -boot c as my boot command.
> (Before this, you'll need to have a CD attached, of course, in order to
> install it.)