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KVM: s390: protvirt: Add UV debug trace 

Let's have some debug traces which stay around for longer than the
guest.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Janosch Frank 2019-10-02 04:46:58 -04:00 committed by Christian Borntraeger
parent f65470661f
commit 3e6c556899
2 changed files with 21 additions and 3 deletions
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11
arch/s390/kvm/kvm-s390.c
View File

@ -2,7 +2,7 @@
/*
* hosting IBM Z kernel virtual machines (s390x)
*
* Copyright IBM Corp. 2008, 2018
* Copyright IBM Corp. 2008, 2020
*
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com>
@ -220,6 +220,7 @@ static struct kvm_s390_vm_cpu_subfunc kvm_s390_available_subfunc;
static struct gmap_notifier gmap_notifier;
static struct gmap_notifier vsie_gmap_notifier;
debug_info_t *kvm_s390_dbf;
debug_info_t *kvm_s390_dbf_uv;
/* Section: not file related */
int kvm_arch_hardware_enable(void)
@ -460,7 +461,12 @@ int kvm_arch_init(void *opaque)
if (!kvm_s390_dbf)
return -ENOMEM;
if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view))
kvm_s390_dbf_uv = debug_register("kvm-uv", 32, 1, 7 * sizeof(long));
if (!kvm_s390_dbf_uv)
goto out;
if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view) ||
debug_register_view(kvm_s390_dbf_uv, &debug_sprintf_view))
goto out;
kvm_s390_cpu_feat_init();
@ -487,6 +493,7 @@ void kvm_arch_exit(void)
{
kvm_s390_gib_destroy();
debug_unregister(kvm_s390_dbf);
debug_unregister(kvm_s390_dbf_uv);
}
/* Section: device related */

13
arch/s390/kvm/kvm-s390.h
View File

@ -2,7 +2,7 @@
/*
* definition for kvm on s390
*
* Copyright IBM Corp. 2008, 2009
* Copyright IBM Corp. 2008, 2020
*
* Author(s): Carsten Otte <cotte@de.ibm.com>
* Christian Borntraeger <borntraeger@de.ibm.com>
@ -25,6 +25,17 @@
#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
extern debug_info_t *kvm_s390_dbf;
extern debug_info_t *kvm_s390_dbf_uv;
#define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
do { \
debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
d_args); \
debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
"%d: " d_string "\n", (d_kvm)->userspace_pid, \
d_args); \
} while (0)
#define KVM_EVENT(d_loglevel, d_string, d_args...)\
do { \
debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \