This capability exists, but we don't record anything when userspace
enables it. Let's refactor that code so that a note can be made in
the debug logs that it was enabled.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20211008203112.1979843-7-farman@linux.ibm.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
case KVM_S390_PV_COMMAND: {
struct kvm_pv_cmd args;
- /* protvirt means user sigp */
- kvm->arch.user_cpu_state_ctrl = 1;
+ /* protvirt means user cpu state */
+ kvm_s390_set_user_cpu_state_ctrl(kvm);
r = 0;
if (!is_prot_virt_host()) {
r = -EINVAL;
vcpu_load(vcpu);
/* user space knows about this interface - let it control the state */
- vcpu->kvm->arch.user_cpu_state_ctrl = 1;
+ kvm_s390_set_user_cpu_state_ctrl(vcpu->kvm);
switch (mp_state->mp_state) {
case KVM_MP_STATE_STOPPED:
return kvm->arch.user_cpu_state_ctrl != 0;
}
+static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
+{
+ if (kvm->arch.user_cpu_state_ctrl)
+ return;
+
+ VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
+ kvm->arch.user_cpu_state_ctrl = 1;
+}
+
/* implemented in pv.c */
int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);