Quoting Michael Tokarev (2022-05-16 07:46:01) > Yes this is possible, but only at the binfmt_misc level. > > echo 0 > /proc/sys/fs/binfmt_misc/qemu-aarch64 -- disable this particular > entry > echo 1 > /proc/sys/fs/binfmt_misc/qemu-aarch64 -- enable it > > echo 0 > /proc/sys/fs/binfmt_misc/status -- disable whole binfmt support > echo 1 > /proc/sys/fs/binfmt_misc/status -- enable it > > With systemd you can disable particular formats/architectures entirely > by masking /usr/lib/binfmt.d/qemu-foo.conf in /etc/binfmt.d/ (if you remove > binfmt-support).
I just learned about a much simpler way (classic: right after asking the expert). qemu-user emulation is also disabled by setting the QEMU_VERSION variable to something as this will mean that qemu-user exits without doing anything (other than printing version information): https://sources.debian.org/src/qemu/1:7.0+dfsg-7/linux-user/main.c/?hl=543#L480 I'm just noting this here because I'm sure future-me will soon forget about this again. XD
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