PER_EVENT_IFETCH
per_kprobe.control.val = PER_EVENT_IFETCH;
new.control.val |= PER_EVENT_IFETCH;
PER_EVENT_IFETCH : child->thread.per_user.control;
new.control.val |= PER_EVENT_IFETCH;
vcpu->arch.sie_block->gcr[9] |= PER_EVENT_IFETCH;
#define PER_CODE_IFETCH (PER_EVENT_IFETCH >> 24)
!(vcpu->arch.sie_block->gcr[9] & PER_EVENT_IFETCH))
*cr9 |= PER_EVENT_IFETCH | PER_EVENT_BRANCH;