DMA_FSTS_ICE
if (fault & DMA_FSTS_ICE)
if (fault & (DMA_FSTS_IQE | DMA_FSTS_ITE | DMA_FSTS_ICE))
if (fault & DMA_FSTS_ICE) {
writel(DMA_FSTS_ICE, iommu->reg + DMAR_FSTS_REG);