KVM: x86: Drop now-redundant MAXPHYADDR and GPA rsvd bits from vCPU c…

…reation

Drop the manual initialization of maxphyaddr and reserved_gpa_bits during
vCPU creation now that kvm_arch_vcpu_create() unconditionally invokes
kvm_vcpu_after_set_cpuid(), which handles all such CPUID caching.

None of the helpers between the existing code in kvm_arch_vcpu_create()
and the call to kvm_vcpu_after_set_cpuid() consume maxphyaddr or
reserved_gpa_bits (though auditing vmx_vcpu_create() and svm_vcpu_create()
isn't exactly easy).

Link: https://lore.kernel.org/r/20241128013424.4096668-13-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

arch/x86/kvm/x86.c

@@ -12258,9 +12258,6 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 		goto free_emulate_ctxt;
 	}
 
-	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
-	vcpu->arch.reserved_gpa_bits = kvm_vcpu_reserved_gpa_bits_raw(vcpu);
-
 	kvm_async_pf_hash_reset(vcpu);
 
 	if (kvm_check_has_quirk(vcpu->kvm, KVM_X86_QUIRK_STUFF_FEATURE_MSRS)) {