GT_PARITY_ERROR
gen5_enable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
gen5_disable_gt_irq(dev_priv, GT_PARITY_ERROR(dev_priv));
iir &= GT_PARITY_ERROR(dev_priv);
if (gt_iir & GT_PARITY_ERROR(dev_priv))
dev_priv->gt_irq_mask = ~GT_PARITY_ERROR(dev_priv);
gt_irqs |= GT_PARITY_ERROR(dev_priv);