On Wed, 2020-06-24 at 03:24 -0300, Leonardo Bras wrote:

As of today, enable_ddw() will return a non-null DMA address if the
created DDW maps the whole partition. If the address is valid,
iommu_bypass_supported_pSeriesLP() will consider iommu bypass enabled.

This can cause some trouble if the DDW happens to start at 0x00.

Instead if checking if the address is non-null, check directly if
the DDW maps the whole partition, so it can bypass iommu.

Signed-off-by: Leonardo Bras <redacted>

This patch has a bug in it. I will rework it soon.
Please keep reviewing patches 1-5.

Best regards,
Leonardo