KVM: async_pf: Exploit one reg interface for pfault
To enable pfault after live migration we need to expose pfault_token,
pfault_select and pfault_compare, as one reg registers to userspace.
So that qemu is able to transfer this between the source and the target.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d8e9f04..a5da2cc 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -561,6 +561,18 @@
r = put_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
+ case KVM_REG_S390_PFTOKEN:
+ r = put_user(vcpu->arch.pfault_token,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFCOMPARE:
+ r = put_user(vcpu->arch.pfault_compare,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFSELECT:
+ r = put_user(vcpu->arch.pfault_select,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}
@@ -590,6 +602,18 @@
r = get_user(vcpu->arch.sie_block->ckc,
(u64 __user *)reg->addr);
break;
+ case KVM_REG_S390_PFTOKEN:
+ r = get_user(vcpu->arch.pfault_token,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFCOMPARE:
+ r = get_user(vcpu->arch.pfault_compare,
+ (u64 __user *)reg->addr);
+ break;
+ case KVM_REG_S390_PFSELECT:
+ r = get_user(vcpu->arch.pfault_select,
+ (u64 __user *)reg->addr);
+ break;
default:
break;
}