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Re: Starting raspi3 machine at EL2 or EL3

From: Alex Bennée
Subject: Re: Starting raspi3 machine at EL2 or EL3
Date: Fri, 12 Nov 2021 10:27:00 +0000
User-agent: mu4e 1.7.4; emacs 28.0.60

Rodolphe Lepigre <lepigre@mpi-sws.org> writes:

> Dear QEMU users mailing list,
> I have been spending a bit of time experimenting with the emulation
> of a Raspberry Pi 3 computer using QEMU (version  6.1.0) by running
> the following command.
> $> qemu-system-aarch64 -M raspi3 -nographics -kernel kernel8.img
> After booting the machine, the cores are running at exception level
> 1 (i.e., EL1), and I was not able to find a way to make it start at
> EL2 (or EL3) instead. Is that at all possible? And if yes, how?

If you use -bios it should load at a higher exception level. Currently
only the virt board supports the "virtualization" and "secure" machine
properties that allow a kernel to be directly booted at the elevated
exception levels.

> Thanks!
> Cheers,
> Rodolphe.

Alex Bennée

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