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KVM: s390: add exit io request stats and simplify code 

We want to count IO exit requests in kvm_stat. At the same time
we can get rid of the handle_noop function.

Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2018-02-23 07:57:33 +00:00
parent 5c2b4d5b78
commit a5e0acea9e
3 changed files with 6 additions and 13 deletions
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1
arch/s390/include/asm/kvm_host.h
View File

@ -294,6 +294,7 @@ struct kvm_vcpu_stat {
u64 exit_userspace;
u64 exit_null;
u64 exit_external_request;
u64 exit_io_request;
u64 exit_external_interrupt;
u64 exit_stop_request;
u64 exit_validity;

17
arch/s390/kvm/intercept.c
View File

@ -50,18 +50,6 @@ u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
return ilen;
}
static int handle_noop(struct kvm_vcpu *vcpu)
{
switch (vcpu->arch.sie_block->icptcode) {
case 0x10:
vcpu->stat.exit_external_request++;
break;
default:
break; /* nothing */
}
return 0;
}
static int handle_stop(struct kvm_vcpu *vcpu)
{
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
@ -465,8 +453,11 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
switch (vcpu->arch.sie_block->icptcode) {
case ICPT_EXTREQ:
vcpu->stat.exit_external_request++;
return 0;
case ICPT_IOREQ:
return handle_noop(vcpu);
vcpu->stat.exit_io_request++;
return 0;
case ICPT_INST:
rc = handle_instruction(vcpu);
break;

1
arch/s390/kvm/kvm-s390.c
View File

@ -64,6 +64,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "exit_validity", VCPU_STAT(exit_validity) },
{ "exit_stop_request", VCPU_STAT(exit_stop_request) },
{ "exit_external_request", VCPU_STAT(exit_external_request) },
{ "exit_io_request", VCPU_STAT(exit_io_request) },
{ "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
{ "exit_instruction", VCPU_STAT(exit_instruction) },
{ "exit_pei", VCPU_STAT(exit_pei) },