KVM: s390: expose gbea register to userspace

For migration/reset we want to expose the guest breaking event
address register to userspace. Lets use ONE_REG for that purpose.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>

diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
index 7663244..2f0ade2 100644 (file)
--- a/arch/s390/include/uapi/asm/kvm.h
+++ b/arch/s390/include/uapi/asm/kvm.h
@@ -77,4 +77,5 @@ struct kvm_sync_regs {
 #define KVM_REG_S390_PFCOMPARE (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x6)
 #define KVM_REG_S390_PFSELECT  (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x7)
 #define KVM_REG_S390_PP                (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x8)
+#define KVM_REG_S390_GBEA      (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x9)
 #endif

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0262936..a3e4c07 100644 (file)
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -576,6 +576,10 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu,
                r = put_user(vcpu->arch.sie_block->pp,
                             (u64 __user *)reg->addr);
                break;
+       case KVM_REG_S390_GBEA:
+               r = put_user(vcpu->arch.sie_block->gbea,
+                            (u64 __user *)reg->addr);
+               break;
        default:
                break;
        }
@@ -621,6 +625,10 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu,
                r = get_user(vcpu->arch.sie_block->pp,
                             (u64 __user *)reg->addr);
                break;
+       case KVM_REG_S390_GBEA:
+               r = get_user(vcpu->arch.sie_block->gbea,
+                            (u64 __user *)reg->addr);
+               break;
        default:
                break;
        }