ARM: KVM: abstract HSR_SRT_{MASK,SHIFT} away

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

arch/arm/include/asm/kvm_emulate.h

@@ -105,4 +105,9 @@ static inline bool kvm_vcpu_dabt_issext(struct kvm_vcpu *vcpu)
 	return kvm_vcpu_get_hsr(vcpu) & HSR_SSE;
 }
 
+static inline int kvm_vcpu_dabt_get_rd(struct kvm_vcpu *vcpu)
+{
+	return (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
+}
+
 #endif /* __ARM_KVM_EMULATE_H__ */

arch/arm/kvm/mmio.c

@@ -94,7 +94,7 @@ static int decode_hsr(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 
 	is_write = kvm_vcpu_dabt_iswrite(vcpu);
 	sign_extend = kvm_vcpu_dabt_issext(vcpu);
-	rt = (kvm_vcpu_get_hsr(vcpu) & HSR_SRT_MASK) >> HSR_SRT_SHIFT;
+	rt = kvm_vcpu_dabt_get_rd(vcpu);
 
 	if (kvm_vcpu_reg_is_pc(vcpu, rt)) {
 		/* IO memory trying to read/write pc */