Arm + KASAN + syzbot

[Dmitry Vyukov]

On Tue, Jan 19, 2021 at 11:17 AM Linus Walleij <linus.walleij at linaro.org> wrote:
> > > You could also try other QEMU machine (I don't know many of them, some
> > > time ago I was using exynos defconfig on smdkc210, but without KASAN).
> >
> > vexpress-a15 seems to be the most widely used and more maintained. It
> > works without KASAN. Is there a reason to switch to something else?
>
> Vexpress A15 is as good as any.
>
> It can however be compiled in two different ways depending on whether
> you use LPAE or not, and the defconfig does not use LPAE.
> By setting CONFIG_ARM_LPAE you more or less activate a totally
> different MMU on the same machine, and those are the two
> MMUs used by ARM32 systems, so I would test these two.
>
> The other interesting Qemu target that is and was used a lot is
> Versatile, versatile_defconfig. This is an older ARMv5 (ARM926EJ-S)
> CPU core with less memory, but the MMU should be behaving the same
> as vanilla Vexpress.

That's interesting. If we have more than 1 instance in future we could
vary different aspects between them to get more combined coverage.
E.g. one could use ARM_LPAE=y while another ARM_LPAE=n.

But let's start with 1 instance running first :)