KVM: VMX: Shadow VMCS pin controls

Prepare to shadow all major control fields on a per-VMCS basis, which
allows KVM to avoid costly VMWRITEs when switching between vmcs01 and
vmcs02.

Shadowing pin controls also allows a future patch to remove the per-VMCS
'hv_timer_armed' flag, as the shadow copy is a superset of said flag.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/vmx/vmx.h

@@ -88,6 +88,7 @@ struct pt_desc {
 struct vmx_controls_shadow {
 	u32 vm_entry;
 	u32 vm_exit;
+	u32 pin;
 };
 
 /*
@@ -423,6 +424,7 @@ static inline void lname##_controls_clearbit(struct vcpu_vmx *vmx, u32 val) \
 }
 BUILD_CONTROLS_SHADOW(vm_entry, VM_ENTRY_CONTROLS)
 BUILD_CONTROLS_SHADOW(vm_exit, VM_EXIT_CONTROLS)
+BUILD_CONTROLS_SHADOW(pin, PIN_BASED_VM_EXEC_CONTROL)
 
 static inline void vmx_segment_cache_clear(struct vcpu_vmx *vmx)
 {