Re: [RFC PATCH v5 026/104] KVM: TDX: x86: Add vm ioctl to get TDX systemwide parameters

[Paolo Bonzini]

On 3/4/22 20:48, isaku.yamahata@xxxxxxxxx wrote:
> Implement a VM-scoped subcomment to get system-wide parameters.  Although
> this is system-wide parameters not per-VM, this subcomand is VM-scoped
> because
> - Device model needs TDX system-wide parameters after creating KVM VM.
> - This subcommands requires to initialize TDX module.  For lazy
>    initialization of the TDX module, vm-scope ioctl is better.

Since there was agreement to install the TDX module on load, please 
place this ioctl on the /dev/kvm file descriptor.

At least for SEV, there were cases where the system-wide parameters are 
needed outside KVM, so it's better to avoid requiring a VM file descriptor.

Thanks,

Paolo