Create ppc64el Debian Buster VM and run it, how?

**Describe the issue**
I'd like to create a VM for Debian Buster on ppc64el, and run it on Apple Silicon with UTM.
I started with `debian-10.12.0-ppc64el-netinst.iso`, dropped it into the virtual CD drive, and went through the manual installation.

I can boot the machine into single-user mode (append `init=/bin/bash` to the `kernel` line) but cannot proceed from there with CTRL-D; a "Guest Panic" results.
Without the addition, I get a black screen with no response, about 10 seconds into running the kernel.

(BTW, I had to hijack the qcow2 file from another VM, because sizing a new one didn't work as expected. This is probably completely unrelated.)

**Configuration**
* UTM Version: 3.2.4
* macOS Version: 12.5.1
* Mac Chip (Intel, M1, ...): M1 (MB Air 2021)

**Crash log**
N/A ("Crash Reports" are empty, I'm appending a Diagnostic Report that seems to match)

**Debug log**
(see below)

**Upload VM**
(see below)