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KVM: s390: generalize kvm_s390_get_tod_clock_ext()

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Move the Multiple-epoch facility handling into it and rename it to
kvm_s390_get_tod_clock().

This leaves us with:
- kvm_s390_set_tod_clock()
- kvm_s390_get_tod_clock()
- kvm_s390_get_tod_clock_fast()

So all Multiple-epoch facility is hidden in these functions.

Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
David Hildenbrand 2018-04-27 14:36:13 +02:00 committed by Christian Borntraeger
parent 9ac96d759f
commit 33d1b2729e
1 changed files with 9 additions and 12 deletions
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21
arch/s390/kvm/kvm-s390.c
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@ -1040,8 +1040,8 @@ static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr)
return ret;
}
static void kvm_s390_get_tod_clock_ext(struct kvm *kvm,
struct kvm_s390_vm_tod_clock *gtod)
static void kvm_s390_get_tod_clock(struct kvm *kvm,
struct kvm_s390_vm_tod_clock *gtod)
{
struct kvm_s390_tod_clock_ext htod;
@ -1050,10 +1050,12 @@ static void kvm_s390_get_tod_clock_ext(struct kvm *kvm,
get_tod_clock_ext((char *)&htod);
gtod->tod = htod.tod + kvm->arch.epoch;
gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
if (gtod->tod < htod.tod)
gtod->epoch_idx += 1;
gtod->epoch_idx = 0;
if (test_kvm_facility(kvm, 139)) {
gtod->epoch_idx = htod.epoch_idx + kvm->arch.epdx;
if (gtod->tod < htod.tod)
gtod->epoch_idx += 1;
}
preempt_enable();
}
@ -1063,12 +1065,7 @@ static int kvm_s390_get_tod_ext(struct kvm *kvm, struct kvm_device_attr *attr)
struct kvm_s390_vm_tod_clock gtod;
memset(&gtod, 0, sizeof(gtod));
if (test_kvm_facility(kvm, 139))
kvm_s390_get_tod_clock_ext(kvm, &gtod);
else
gtod.tod = kvm_s390_get_tod_clock_fast(kvm);
kvm_s390_get_tod_clock(kvm, &gtod);
if (copy_to_user((void __user *)attr->addr, &gtod, sizeof(gtod)))
return -EFAULT;