Re: [PATCH RFC v1 07/20] KVM: nVMX: Support the extended instruction info field

[Chang S. Bae]

On 11/11/2025 5:54 PM, Chao Gao wrote:
> Shouldn't we check guest's capabilities rather than host's,
>
> i.e., guest_cpu_cap_has(X86_FEATURE_APX)?

Perhaps adding a comment like this would help clarify it:

  /*
   * The APX enumeration guarantees the presence of the extended
   * field. The host CPUID bit alone is sufficient to rely on it.
   */
  static inline bool vmx_ext_insn_info_available(void) {
	return static_cpu_has(X86_FEATURE_APX);
  }