On 04/10/2017 13:08, HEBBAL Yacine wrote: >> Could it be that your field is placed after the end of the page? >> >> Paolo > > My code works well as expected when I move the added field to the top > of kvm_run structure. > I did some investigation to understand why my code does not work when > I put the added field at the end of kvm_run. Here is what I got: > > KVM: > @vcpu->run -> 0x*****e000 > size of (struct kvm_run) -> 1360 > added field offset in kvm_run -> 1336 > > Qemu: > @cpu->kvm_run -> 0x****f000 > size of (struct kvm_run) -> 2384 > added field offset in kvm_run -> 2360 > > I see that in Qemu and KVM the added field is inside the page but at > different offset from the start of kvm_run. > Do you think that the problem is that the added field is at different > offsets in KVM & Qemu ? Yes, definitely. Paolo
