KVM: PPC: Unify kvmppc_get_last_inst and sc

We had code duplication between the inline functions to get our last
instruction on normal interrupts and system call interrupts. Unify
both helper functions towards a single implementation.
Signed-off-by: Alexander Graf <agraf@suse.de>

arch/powerpc/include/asm/kvm_book3s.h

@@ -264,10 +264,8 @@ static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 	return vcpu->arch.pc;
 }
 
-static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
+static inline u32 kvmppc_get_last_inst_internal(struct kvm_vcpu *vcpu, ulong pc)
 {
-	ulong pc = kvmppc_get_pc(vcpu);
-
 	/* Load the instruction manually if it failed to do so in the
 	 * exit path */
 	if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
@@ -276,6 +274,11 @@ static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 	return vcpu->arch.last_inst;
 }
 
+static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
+{
+	return kvmppc_get_last_inst_internal(vcpu, kvmppc_get_pc(vcpu));
+}
+
 /*
  * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
  * Because the sc instruction sets SRR0 to point to the following
@@ -283,14 +286,7 @@ static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
  */
 static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
 {
-	ulong pc = kvmppc_get_pc(vcpu) - 4;
-
-	/* Load the instruction manually if it failed to do so in the
-	 * exit path */
-	if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
-		kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
-
-	return vcpu->arch.last_inst;
+	return kvmppc_get_last_inst_internal(vcpu, kvmppc_get_pc(vcpu) - 4);
 }
 
 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)