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target/s390x/cpu_models: Make kvm_s390_get_host_cpu_model() return boolean 

As error.h suggested, the best practice for callee is to return
something to indicate success / failure.

So make kvm_s390_get_host_cpu_model() return boolean and check the
returned boolean in get_max_cpu_model() instead of accessing @err.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-ID: <20240425031232.1586401-5-zhao1.liu@intel.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Zhao Liu 2024-04-25 11:12:29 +08:00 committed by Thomas Huth
parent 9c2df9c5e8
commit 47ab3b2137
3 changed files with 12 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
target/s390x/cpu_models.c
View File

@ -560,16 +560,15 @@ S390CPUModel *get_max_cpu_model(Error **errp)
}
if (kvm_enabled()) {
kvm_s390_get_host_cpu_model(&max_model, &err);
if (!kvm_s390_get_host_cpu_model(&max_model, &err)) {
error_propagate(errp, err);
return NULL;
}
} else {
max_model.def = s390_find_cpu_def(QEMU_MAX_CPU_TYPE, QEMU_MAX_CPU_GEN,
QEMU_MAX_CPU_EC_GA, NULL);
bitmap_copy(max_model.features, qemu_max_cpu_feat, S390_FEAT_MAX);
}
if (err) {
error_propagate(errp, err);
return NULL;
}
cached = true;
return &max_model;
}

2
target/s390x/cpu_models.h
View File

@ -115,7 +115,7 @@ S390CPUDef const *s390_find_cpu_def(uint16_t type, uint8_t gen, uint8_t ec_ga,
S390FeatBitmap features);
bool kvm_s390_cpu_models_supported(void);
void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
bool kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp);
void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp);
#endif /* TARGET_S390X_CPU_MODELS_H */

13
target/s390x/kvm/kvm.c
View File

@ -2375,7 +2375,7 @@ bool kvm_s390_cpu_models_supported(void)
KVM_S390_VM_CPU_MACHINE_SUBFUNC);
}
void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
bool kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
{
struct kvm_s390_vm_cpu_machine prop = {};
struct kvm_device_attr attr = {
@ -2390,14 +2390,14 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
if (!kvm_s390_cpu_models_supported()) {
error_setg(errp, "KVM doesn't support CPU models");
return;
return false;
}
/* query the basic cpu model properties */
rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
if (rc) {
error_setg(errp, "KVM: Error querying host CPU model: %d", rc);
return;
return false;
}
cpu_type = cpuid_type(prop.cpuid);
@ -2420,13 +2420,13 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
rc = query_cpu_feat(model->features);
if (rc) {
error_setg(errp, "KVM: Error querying CPU features: %d", rc);
return;
return false;
}
/* get supported cpu subfunctions indicated via query / test bit */
rc = query_cpu_subfunc(model->features);
if (rc) {
error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc);
return;
return false;
}
/* PTFF subfunctions might be indicated although kernel support missing */
@ -2482,7 +2482,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
}
if (!model->def) {
error_setg(errp, "KVM: host CPU model could not be identified");
return;
return false;
}
/* for now, we can only provide the AP feature with HW support */
if (ap_available()) {
@ -2506,6 +2506,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
/* strip of features that are not part of the maximum model */
bitmap_and(model->features, model->features, model->def->full_feat,
S390_FEAT_MAX);
return true;
}
static int configure_uv_feat_guest(const S390FeatBitmap features)