Re: [PATCH] iommu/amd: Assign default IOMMU when there is only one IOMMU

[Joerg Roedel]

On Fri, Dec 11, 2015 at 04:54:38PM -0600, Suravee Suthikulpanit wrote:
> Current driver makes assumption that device with devid zero is always
> included in the range of devices to be managed by IOMMU. However,
> certain FW does not include devid zero in IVRS table.
> This has caused IOMMU perf driver to fail to initialize.

Hmm, this is a firmware bug. Is this bug seen in any systems that are
for sale?

> This patch implements a workaround for this case by always assign
> devid zero to be handled by the first IOMMU.

Otherwise its better to fix the firmware than to add workarounds.


	Joerg

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/