Re: [PATCH v2 04/23] kvm: x86: Exclude unpermitted xfeatures at KVM_GET_SUPPORTED_CPUID

[Paolo Bonzini]

On 12/17/21 16:29, Jing Liu wrote:
>   
> +Permissions must be set via prctl() for dynamically-enabled XSAVE
> +features before calling this ioctl. Otherwise those feature bits are
> +excluded.
> +

Dynamically-enabled feature bits need to be requested with 
``arch_prctl()`` before calling this ioctl.  Feature bits that have not 
been requested are excluded from the result.

Thanks,

Paolo