Re: [RFC PATCH v1 06/10] KVM: s390: Add vm IOCTL for key checked guest absolute memory access

[Thomas Huth]

On 18/01/2022 10.52, Janis Schoetterl-Glausch wrote:
> Channel I/O honors storage keys and is performed on absolute memory.
> For I/O emulation user space therefore needs to be able to do key
> checked accesses.

Can't we do the checking in userspace? We already have functions for 
handling the storage keys there (see hw/s390x/s390-skeys-kvm.c), so why 
can't we do the checking in QEMU?

 Thomas