Hi Joerg,
On Monday 18 May 2015 19:04:30 Joerg Roedel wrote:
On Mon, May 18, 2015 at 02:09:14PM +0200, Marek Szyprowski wrote:
Hmm, will this remove support for iommu-groups in the exynos driver? I am still working on the default-domain patch-set which makes iommu-group support mandatory for iommu-drivers.
I you wish, I can leave this code. iommu-groups were not used at all on Exynos, so I thought that there is no point keeping useless code.
Yes, please keep the iommu-goups support, it will be required at some point.
I think the concept of iommu groups isn't very well understood, hence the little love it receives from developers who conclude it's useless. I can't blame anyone, I don't do any better. Could I convince you to include documentation in your next patch series that touches iommu groups ?
Could you please have a look at my "[RFC/PATCH 0/9] IOMMU probe deferral support" patch series in the context of iommu groups ? The series pretty much drops groups support from the ipmmu-vmsa driver, not because of a real desire to do so, but because I wasn't sure how to keep them. Tips would be appreciated.