Re: [kvm-unit-tests PATCH v2] arm64: Add basic MTE test

[Alexandru Elisei <alexandru.elisei@arm.com>]

Hi Vladimir,

On Thu, Jan 02, 2025 at 10:04:37AM +0000, Vladimir Murzin wrote:
[..]
> On 12/30/24 15:19, Alexandru Elisei wrote:
> > Hi Vladimir,
> > Interestingly though, when I try to run a test (either with ./run_tests.sh
> > mte-sync, or by trying out your example), I get this error:
> > 
> > qemu-system-aarch64: MTE requested, but not supported by the guest CPU
> > 
> > My guess is that's caused by kvm-unit-tests defaulting to cortex-a57 as the
> > model CPU. Changing the cpu to 'max' makes the test run. How are you getting
> > around this on your end?
> > 
> 
> ./configure --arch=arm64 --processor=max

Ah, so that explains it. Would you mind adding this information to the commit
message, perhaps something like this:

If using TCG as the accelerator, qemu must emulate a CPU that supports MTE
in order for the tests to run. Use configure --processor to set an
appropriate CPU. If unsure about a particular processor, 'max' will most
likely work with a new enough qemu version.

> 
> Thanks
> Vladimir
> 
> > Thanks,
> > Alex
> > 
>