Re: [PATCH v1 3/4] KVM: VMX: Handle the immediate form of MSR instructions

[Xin Li]

On 7/31/2025 9:53 AM, Xin Li wrote:
> > The CPUID feature bit also indicates support for the two new VM-exit 
> > reasons.
> > Therefore, KVM needs to reflect EXIT_REASON_MSR_READ/WRITE_IMM VM- 
> > exits to
> > L1 guests in nested cases if KVM claims it supports the new form of MSR
> > instructions.
>
> Damn, forgot about nested...

The current nested KVM VMX implementation already handles VM exits
caused by the immediate form of MSR instructions, forwarding them to L1
as intended by design.

I just need to add MSR bitmap checks to nested_vmx_exit_handled_msr().

Thanks!
    Xin