KVM: VMX: Move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering out of setup_vmcs_config()

As a preparation to reusing the result of setup_vmcs_config() in
nested VMX MSR setup, move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering
to vmx_exec_control().

No functional change intended.
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-25-vkuznets@redhat.comSigned-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.c

@@ -2556,11 +2556,6 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
 				MSR_IA32_VMX_PROCBASED_CTLS,
 				&_cpu_based_exec_control))
 		return -EIO;
-#ifdef CONFIG_X86_64
-	if (_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)
-		_cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
-					   ~CPU_BASED_CR8_STORE_EXITING;
-#endif
 	if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
 		if (adjust_vmx_controls(KVM_REQUIRED_VMX_SECONDARY_VM_EXEC_CONTROL,
 					KVM_OPTIONAL_VMX_SECONDARY_VM_EXEC_CONTROL,
@@ -4331,13 +4326,17 @@ static u32 vmx_exec_control(struct vcpu_vmx *vmx)
 	if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)
 		exec_control &= ~CPU_BASED_MOV_DR_EXITING;
 
-	if (!cpu_need_tpr_shadow(&vmx->vcpu)) {
+	if (!cpu_need_tpr_shadow(&vmx->vcpu))
 		exec_control &= ~CPU_BASED_TPR_SHADOW;
+
 #ifdef CONFIG_X86_64
+	if (exec_control & CPU_BASED_TPR_SHADOW)
+		exec_control &= ~(CPU_BASED_CR8_LOAD_EXITING |
+				  CPU_BASED_CR8_STORE_EXITING);
+	else
 		exec_control |= CPU_BASED_CR8_STORE_EXITING |
 				CPU_BASED_CR8_LOAD_EXITING;
 #endif
-	}
 	if (!enable_ept)
 		exec_control |= CPU_BASED_CR3_STORE_EXITING |
 				CPU_BASED_CR3_LOAD_EXITING  |