KVM: x86: Check irqchip mode before create PIT
As the kvm api(https://docs.kernel.org/virt/kvm/api.html) reads,
KVM_CREATE_PIT2 call is only valid after enabling in-kernel irqchip
support via KVM_CREATE_IRQCHIP.
Without this check, I can create PIT first and enable irqchip-split
then, which may cause the PIT invalid because of lacking of in-kernel
PIC to inject the interrupt.
Signed-off-by: Tengfei Yu <moehanabichan@gmail.com>
Message-Id: <
20240125050823.4893-1-moehanabichan@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>