KVM: Replace reads of vcpu->arch.cr3 by an accessor

This allows us to keep cr3 in the VMCS, later on.

Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/kvm/kvm_cache_regs.h

@@ -73,6 +73,11 @@ static inline ulong kvm_read_cr4_bits(struct kvm_vcpu *vcpu, ulong mask)
 	return vcpu->arch.cr4 & mask;
 }
 
+static inline ulong kvm_read_cr3(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.cr3;
+}
+
 static inline ulong kvm_read_cr4(struct kvm_vcpu *vcpu)
 {
 	return kvm_read_cr4_bits(vcpu, ~0UL);