Hi All, I added a field to "kvm_run" data structure in both Qemu and KVM to create a communication interface for a VM security monitoring application (in user space) in order to avoid heavy modifications in the hypervisor. The problem I'm facing is that when this field is updated in KVM after a VM exit, I don't see the written value in "kvm_run" at Qemu function "kvm_arch_handle_exit". My question is how "kvm_run" is synchronized between Qemu and KVM ? Thank you in advance for your answers. Yacine