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authorDavid Hildenbrand <david@redhat.com>2018-04-27 14:36:13 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2018-05-17 09:02:37 +0200
commit33d1b2729e409e8327dec2d13a9144dfa76a947c (patch)
treeeb18b2f8c207f54f54a5a25a11337e9e0acd3162 /arch/s390
parent9ac96d759fa2de2386a4fccab80880f99d1161d2 (diff)
KVM: s390: generalize kvm_s390_get_tod_clock_ext()
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>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/kvm/kvm-s390.c21
1 files changed, 9 insertions, 12 deletions
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index fd7ce3ab45eb..e521f7699032 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -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;