[Qemu-devel] Re: [PATCH 0/9] S390x KVM support

[Carsten Otte]

Avi Kivity wrote:
> Right, but why?  x86 qemu doesn't care about either pc or eflags (with 
> in-kernel irqchip, which s390 essentially is).
For different reasons. Most prominent for setting the condition code,
which is a sideband result of most instructions that indicates whether or
not the instruction actually worked - similar to the exception model in
high level programming languages.