Re: [PATCH 1/5] KVM: nVMX: Fix VMX controls MSRs setup when nested VMX enabled

Chenyi Qiang
2020-08-29T01:49:56Z

On 8/29/2020 1:43 AM, Jim Mattson wrote:
> On Fri, Aug 28, 2020 at 1:54 AM Chenyi Qiang <chenyi.qiang@intel.com> wrote:
>>
>> KVM supports the nested VM_{EXIT, ENTRY}_LOAD_IA32_PERF_GLOBAL_CTRL and
>> VM_{ENTRY_LOAD, EXIT_CLEAR}_BNDCFGS, but they doesn't expose during
>> the setup of nested VMX controls MSR.
>>
>
> Aren't these features added conditionally in
> nested_vmx_entry_exit_ctls_update() and
> nested_vmx_pmu_entry_exit_ctls_update()?
>

Yes, but I assume vmcs_config.nested should reflect the global
capability of VMX MSR. KVM supports these two controls, so should be
exposed here.