On 30.07.2017 14:30, Ady Wahyudi Paundu wrote: > Hi all, > > I still learning how KVM work. Right now I am playing with how the > logical processor works in the non-root operation. From the Intel > programming guide (chap 24 and 25), I know that its behaviours are > controlled by VMCS through the VM-execution control fields. A VMM can > use a different VMCS for each virtual machine that it supports. > If I may ask, on KVM, how can I modify those VM-execution control > fields? For example if I want to make the RDRAND instruction in guest > VM cause a VM Exit by setting the “RDRAND exiting” VM-execution > control. > Can I modify this VM execution control fields at the high level (like > perhaps through libvirt) or it should be at the OS level (maybe there > is a KVM configuration file?) or I should create my own kernel module > to alter those VM-execution control? and how? You'll have to modify KVM directly. That involves recompiling your kernel + modules. > > Thank you in advance for your kind attention. > > ~Ady > -- Thanks, David
