target-s390: Fail on unknown instructions
We were being a bit too nice and didn't give the guest an invalid instructioninterrupt.
While that works, it's not exactly the fastest thing to do, since now theguest doesn't know that we're not really implementing that instruction, so it...
Add support for S390x system emulation
Let's enable the basics for system emulation so we can run virtual machineswith KVM!
Signed-off-by: Alexander Graf <agraf@suse.de>Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Add KVM support for S390x
S390x was one of the first platforms that received support for KVM back in theday. Unfortunately until now there hasn't been a qemu implementation that wouldenable users to actually run guests.
So let's include support for KVM S390x in qemu!...
S/390 CPU fake emulation
Because Qemu currently requires a TCG target to exist and there are quite someuseful helpers here to lay the groundwork for out KVM target, let's create astub TCG emulation target for S390X CPUs.
This is required to make tcg happy. The emulation target itself won't work...