KVM: s390: Provide global debug log
In addition to the per VM debug logs, let's provide a global
one for KVM-wide events, like new guests or fatal errors.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 4c1b5cb..7621036 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -127,6 +127,7 @@
}
static struct gmap_notifier gmap_notifier;
+debug_info_t *kvm_s390_dbf;
/* Section: not file related */
int kvm_arch_hardware_enable(void)
@@ -151,10 +152,24 @@
int kvm_arch_init(void *opaque)
{
+ kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));
+ if (!kvm_s390_dbf)
+ return -ENOMEM;
+
+ if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {
+ debug_unregister(kvm_s390_dbf);
+ return -ENOMEM;
+ }
+
/* Register floating interrupt controller interface. */
return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);
}
+void kvm_arch_exit(void)
+{
+ debug_unregister(kvm_s390_dbf);
+}
+
/* Section: device related */
long kvm_arch_dev_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
@@ -1100,7 +1115,7 @@
mutex_init(&kvm->arch.ipte_mutex);
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
- VM_EVENT(kvm, 3, "%s", "vm created");
+ VM_EVENT(kvm, 3, "vm created with type %lu", type);
if (type & KVM_VM_S390_UCONTROL) {
kvm->arch.gmap = NULL;
@@ -1117,6 +1132,7 @@
kvm->arch.epoch = 0;
spin_lock_init(&kvm->arch.start_stop_lock);
+ KVM_EVENT(3, "vm 0x%p created by pid %u", kvm, current->pid);
return 0;
out_err:
@@ -1124,6 +1140,7 @@
free_page((unsigned long)kvm->arch.model.fac);
debug_unregister(kvm->arch.dbf);
free_page((unsigned long)(kvm->arch.sca));
+ KVM_EVENT(3, "creation of vm failed: %d", rc);
return rc;
}
@@ -1180,6 +1197,7 @@
gmap_free(kvm->arch.gmap);
kvm_s390_destroy_adapters(kvm);
kvm_s390_clear_float_irqs(kvm);
+ KVM_EVENT(3, "vm 0x%p destroyed", kvm);
}
/* Section: vcpu related */