Hey Lu Baolu,

thanks for your review!

On Thu, Aug 15, 2019 at 01:01:57PM +0800, Lu Baolu wrote:
> > +#define IOMMU_CMD_LINE_DMA_API             (1 << 0)
> Prefer BIT() micro?

Yes, I'll change that.

> > +   iommu_set_cmd_line_dma_api();
> IOMMU command line is also set in other places, for example,
> iommu_setup() (arch/x86/kernel/pci-dma.c). Need to call this there as
> well?

You are right, I'll better add a 'bool cmd_line' parameter to the
iommu_set_default_*() functions and tell the IOMMU core this way. That
will also fix iommu=pt/nopt.



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