PEBS_GP_REGS
if (event->attr.sample_regs_user & ~PEBS_GP_REGS)
if (event->attr.sample_regs_intr & ~PEBS_GP_REGS)
(attr->sample_regs_intr & PEBS_GP_REGS)) ||
(attr->sample_regs_user & PEBS_GP_REGS));