if (gtod_high != 0)
return -EINVAL;
- VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x\n", gtod_high);
+ VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high);
return 0;
}
static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
{
- struct kvm_vcpu *cur_vcpu;
- unsigned int vcpu_idx;
- u64 host_tod, gtod;
- int r;
+ u64 gtod;
if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod)))
return -EFAULT;
- r = store_tod_clock(&host_tod);
- if (r)
- return r;
-
- mutex_lock(&kvm->lock);
- preempt_disable();
- kvm->arch.epoch = gtod - host_tod;
- kvm_s390_vcpu_block_all(kvm);
- kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm)
- cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch;
- kvm_s390_vcpu_unblock_all(kvm);
- preempt_enable();
- mutex_unlock(&kvm->lock);
- VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx\n", gtod);
+ kvm_s390_set_tod_clock(kvm, gtod);
+ VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod);
return 0;
}
if (copy_to_user((void __user *)attr->addr, >od_high,
sizeof(gtod_high)))
return -EFAULT;
- VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x\n", gtod_high);
+ VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high);
return 0;
}
static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr)
{
- u64 host_tod, gtod;
- int r;
+ u64 gtod;
- r = store_tod_clock(&host_tod);
- if (r)
- return r;
-
- preempt_disable();
- gtod = host_tod + kvm->arch.epoch;
- preempt_enable();
+ gtod = kvm_s390_get_tod_clock_fast(kvm);
if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod)))
return -EFAULT;
- VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx\n", gtod);
+ VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod);
return 0;
}
if (!kvm->arch.sca)
goto out_err;
spin_lock(&kvm_lock);
- sca_offset = (sca_offset + 16) & 0x7f0;
+ sca_offset += 16;
+ if (sca_offset + sizeof(struct sca_block) > PAGE_SIZE)
+ sca_offset = 0;
kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset);
spin_unlock(&kvm_lock);
return 0;
}
+void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod)
+{
+ struct kvm_vcpu *vcpu;
+ int i;
+
+ mutex_lock(&kvm->lock);
+ preempt_disable();
+ kvm->arch.epoch = tod - get_tod_clock();
+ kvm_s390_vcpu_block_all(kvm);
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ vcpu->arch.sie_block->epoch = kvm->arch.epoch;
+ kvm_s390_vcpu_unblock_all(kvm);
+ preempt_enable();
+ mutex_unlock(&kvm->lock);
+}
+
/**
* kvm_arch_fault_in_page - fault-in guest page if necessary
* @vcpu: The corresponding virtual cpu