KVM: PPC: Add sanity checking to vcpu_run

There are multiple features in PowerPC KVM that can now be enabled
depending on the user's wishes. Some of the combinations don't make
sense or don't work though.

So this patch adds a way to check if the executing environment would
actually be able to run the guest properly. It also adds sanity
checks if PVR is set (should always be true given the current code
flow), if PAPR is only used with book3s_64 where it works and that
HV KVM is only used in PAPR mode.

Signed-off-by: Alexander Graf <agraf@suse.de>

arch/powerpc/include/asm/kvm.h

@@ -284,6 +284,11 @@ struct kvm_guest_debug_arch {
 #define KVM_INTERRUPT_UNSET	-2U
 #define KVM_INTERRUPT_SET_LEVEL	-3U
 
+#define KVM_CPU_440		1
+#define KVM_CPU_E500V2		2
+#define KVM_CPU_3S_32		3
+#define KVM_CPU_3S_64		4
+
 /* for KVM_CAP_SPAPR_TCE */
 struct kvm_create_spapr_tce {
 	__u64 liobn;