Re: [PATCH 4/4] x86,module: Detect CRn and DRn manipulation

Paolo Bonzini
2020-04-08T00:22:55Z

On 08/04/20 01:15, Andrew Cooper wrote:
>> Anyhow, I do not think it is the only use-case which is not covered by your
>> patches (even considering CRs/DRs alone). For example, there is no kernel
>> function to turn on CR4.VMXE, which is required to run hypervisors on x86.
> How about taking this opportunity to see if there is a way to improve on
> the status quo for co-existing hypervisor modules?

Almost serious question: why? I can understand VMware, but why can't at
least VirtualBox use KVM on Linux? I am not sure if they are still
running device emulation in ring zero, but if so do you really want to
do that these days?

Paolo