Messages in this thread | | | Date | Fri, 10 Sep 2021 00:39:01 +0800 | From | Yu Zhang <> | Subject | Re: [PATCH v2 1/3] kvm: x86: Introduce hypercall x86 ops for handling hypercall not in cpl0 |
| |
On Thu, Sep 09, 2021 at 07:55:23PM +0800, Hou Wenlong wrote: > Per Intel's SDM, use vmcall instruction in non VMX operation for cpl3 > it should trigger a #UD. And in VMX root operation, it should
Are you sure? IIRC, vmcall will always cause VM exit as long as CPU is in non-root mode(regardless the CPL).
Also, could you please explain why skipping the vmcall would cause exception in the host? Thanks!
B.R. Yu
| |