Re: [PATCH v2] target/i386: seg_helper: Correct segement selector nullification in the RET/IRET helper

[Paolo Bonzini]

On 17/11/20 11:08, Bin Meng wrote:
> > I see.  Is there any chance you could write a testcase for
> > kvm-unit-tests?  Or just explain how to write such a test, and then I
> > can write it myself; it's not clear to me how the guest can observe the
> > base and limit of a non-present segment.
>
> I am not familiar with kvm-unit-test. The original issue cannot be
> reproduced with a KVM enabled QEMU as the codes-in-flaw is in the
> emulation path.

kvm-unit-tests, despite the name, is a set generic tests for CPU 
behavior; it works with other accelerators that QEMU supports including 
the emulation path.  You can find it at 
https://gitlab.com/kvm-unit-tests/kvm-unit-tests.

If you explain in enough detail how VxWorks triggers the bug, I can take 
care of writing the test.

Paolo