1 files changed, 28 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 13bc798a4441..a8000ce562b0 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -95,6 +95,31 @@ int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
         return r;
 }
 
+int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
+{
+        int r = false;
+
+        /* We have to know what CPU to virtualize */
+        if (!vcpu->arch.pvr)
+                goto out;
+
+        /* PAPR only works with book3s_64 */
+        if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
+                goto out;
+
+#ifdef CONFIG_KVM_BOOK3S_64_HV
+        /* HV KVM can only do PAPR mode for now */
+        if (!vcpu->arch.papr_enabled)
+                goto out;
+#endif
+
+        r = true;
+
+out:
+        vcpu->arch.sane = r;
+        return r ? 0 : -EINVAL;
+}
+
 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
 {
         enum emulation_result er;
@@ -582,6 +607,9 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
                 break;
         }
 
+        if (!r)
+                r = kvmppc_sanity_check(vcpu);
+
         return r;
 }