mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

KVM: s390: add debug tracing for cpu features of CPU model 

The cpu model already traces the cpu facilities, the ibc and
guest CPU ids. We should do the same for the cpu features (on
success only).

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
Christian Borntraeger 2017-11-16 12:30:15 +01:00
parent 241e3ec0fa
commit 2f8311c912
1 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
arch/s390/kvm/kvm-s390.c
View File

@ -1084,7 +1084,6 @@ static int kvm_s390_set_processor_feat(struct kvm *kvm,
struct kvm_device_attr *attr)
{
struct kvm_s390_vm_cpu_feat data;
int ret = -EBUSY;
if (copy_from_user(&data, (void __user *)attr->addr, sizeof(data)))
return -EFAULT;
@ -1094,13 +1093,18 @@ static int kvm_s390_set_processor_feat(struct kvm *kvm,
return -EINVAL;
mutex_lock(&kvm->lock);
if (!kvm->created_vcpus) {
bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
KVM_S390_VM_CPU_FEAT_NR_BITS);
ret = 0;
if (kvm->created_vcpus) {
mutex_unlock(&kvm->lock);
return -EBUSY;
}
bitmap_copy(kvm->arch.cpu_feat, (unsigned long *) data.feat,
KVM_S390_VM_CPU_FEAT_NR_BITS);
mutex_unlock(&kvm->lock);
return ret;
VM_EVENT(kvm, 3, "SET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
data.feat[0],
data.feat[1],
data.feat[2]);
return 0;
}
static int kvm_s390_set_processor_subfunc(struct kvm *kvm,
@ -1202,6 +1206,10 @@ static int kvm_s390_get_processor_feat(struct kvm *kvm,
KVM_S390_VM_CPU_FEAT_NR_BITS);
if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
return -EFAULT;
VM_EVENT(kvm, 3, "GET: guest feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
data.feat[0],
data.feat[1],
data.feat[2]);
return 0;
}
@ -1215,6 +1223,10 @@ static int kvm_s390_get_machine_feat(struct kvm *kvm,
KVM_S390_VM_CPU_FEAT_NR_BITS);
if (copy_to_user((void __user *)attr->addr, &data, sizeof(data)))
return -EFAULT;
VM_EVENT(kvm, 3, "GET: host feat: 0x%16.16llx.0x%16.16llx.0x%16.16llx",
data.feat[0],
data.feat[1],
data.feat[2]);
return 0;
}