KVM: PPC: Booke-hv: Add one reg interface for SPRG9

We now support SPRG9 for guest, so also add a one reg interface for same
Note: Changes are in bookehv code only as we do not have SPRG9 on booke-pr.
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

arch/powerpc/include/uapi/asm/kvm.h

@@ -555,6 +555,7 @@ struct kvm_get_htab_header {
 
 #define KVM_REG_PPC_DABRX	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0xb8)
 #define KVM_REG_PPC_WORT	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xb9)
+#define KVM_REG_PPC_SPRG9	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0xba)
 
 /* Transactional Memory checkpointed state:
  * This is all GPRs, all VSX regs and a subset of SPRs

arch/powerpc/kvm/e500mc.c

@@ -267,14 +267,32 @@ static int kvmppc_core_set_sregs_e500mc(struct kvm_vcpu *vcpu,
 static int kvmppc_get_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id,
 			      union kvmppc_one_reg *val)
 {
-	int r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val);
+	int r = 0;
+
+	switch (id) {
+	case KVM_REG_PPC_SPRG9:
+		*val = get_reg_val(id, vcpu->arch.sprg9);
+		break;
+	default:
+		r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val);
+	}
+
 	return r;
 }
 
 static int kvmppc_set_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id,
 			      union kvmppc_one_reg *val)
 {
-	int r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val);
+	int r = 0;
+
+	switch (id) {
+	case KVM_REG_PPC_SPRG9:
+		vcpu->arch.sprg9 = set_reg_val(id, *val);
+		break;
+	default:
+		r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val);
+	}
+
 	return r;
 }