3 files changed, 17 insertions, 0 deletions

diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index a5607c571cb3..a4df5535996b 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1773,6 +1773,7 @@ registers, find a list below:
   PPC   | KVM_REG_PPC_VPA_ADDR  | 64
   PPC   | KVM_REG_PPC_VPA_SLB   | 128
   PPC   | KVM_REG_PPC_VPA_DTL   | 128
+  PPC   | KVM_REG_PPC_EPCR      | 32
 
 4.69 KVM_GET_ONE_REG
 
diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index 514883dd311e..2fba8a66fb10 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -411,4 +411,6 @@ struct kvm_get_htab_header {
 #define KVM_REG_PPC_VPA_SLB     (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x83)
 #define KVM_REG_PPC_VPA_DTL     (KVM_REG_PPC | KVM_REG_SIZE_U128 | 0x84)
 
+#define KVM_REG_PPC_EPCR        (KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x85)
+
 #endif /* __LINUX_KVM_POWERPC_H */
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 037d045db3f1..69f114015780 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1388,6 +1388,11 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
                                  &vcpu->arch.dbg_reg.dac[dac], sizeof(u64));
                 break;
         }
+#if defined(CONFIG_64BIT)
+        case KVM_REG_PPC_EPCR:
+                r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr);
+                break;
+#endif
         default:
                 break;
         }
@@ -1415,6 +1420,15 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
                              (u64 __user *)(long)reg->addr, sizeof(u64));
                 break;
         }
+#if defined(CONFIG_64BIT)
+        case KVM_REG_PPC_EPCR: {
+                u32 new_epcr;
+                r = get_user(new_epcr, (u32 __user *)(long)reg->addr);
+                if (r == 0)
+                        kvmppc_set_epcr(vcpu, new_epcr);
+                break;
+        }
+#endif
         default:
                 break;
         }