Re: [qemu-s390x] [Qemu-devel] [PATCH v5 4/6] s390x/vfio: ap: Introduce VFIO AP device

[Halil Pasic]

On 05/10/2018 03:10 PM, Tony Krowiak wrote:
> > If I did not. I think this is a big problem. We need to at least
> > zeroize the queues (e.g. on system reset)  to avoid leaking
> > sensitive information. Without this, there is no sane way to use
> > ap-passthrough. Or am I wrong?
>
> I do not have a definitive answer, I will have to look into it.
> I'm thinking that since we are using ap-passthrough, the AP bus
> running on the guest would be responsible for handling reset possibly
> by resetting or zeroizing its queues. I'll get back to you on this.

You are on the wrong track. What I'm talking about is the responsibility
of the hypervisor and not the responsibility of the guest.

Regards,
Halil