My doubt is: will int0x80 from Guest userspace bring me into Guest kernel space or directly into kvm in the Host kernel? How can I trigger a jump from Guest to Host kvm at will? Then the way back from host kernel to guest is via vmenter/vmrun or must be performed in a different way? thanks in advance, Matteo 2009/6/7 Avi Kivity <avi@xxxxxxxxxx>: > Matteo Signorini wrote: >> >> Hi to all, >> >> correct me if I am wrong but isn't it the following the logical >> execution chain of a generic system call performed >> in a Kvm guest? >> >> Guest userspace application -> Guest kernel -> Host kernel (kvm) -> >> Host userspace (Quemu) -> Host kernel -> >> -> Host userspace (Quemu) -> Guest kernel -> Guest userspace application >> >> > > No. The actual path is > > guest userspace -> guest kernel -> guest userspace > > The guest kernel might access emulated hardware, but usually it does not. > >> Is there any detailed documentation on how this happens inside qemu-kvm? >> > > No. > > -- > Do not meddle in the internals of kernels, for they are subtle and quick to > panic. > > -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
