On Wed, 2015-04-08 at 20:24 +0300, Andrii Anisov wrote: I was thinking about this a little more...
> The context here is pretty simple: just a workaround of the real > system limitations: > 1. Renesas R-Car H2 evaluation board lager has 4GB of RAM, 2GB > mapped under 4GB boundary and 2GB over. > 2. The R-Car2 chip has IOMMU's for almost all active devices > except GPU. > 3. Within our system we need one user domain with 2GB of RAM and > dedicated GPU. > 4. While doing PoC we have no access to the GPU driver(and > firmware) sources to introduce swiotlb here. > Having no option to handle GPU driver addressing with iommu (2) or > swiotlb(4), it was decided to place the user domain described in 3 > within RAM below 4GB with 1:1 mapping. Therefore we needed to move all > the rest (XEN, rest of domains) under 4GB. Xen itself (i.e. .text and .data, no the heap etc) is at most 2MB. Are your constraints such that at a 2GB-2MB (i.e. 2046M) domain would not be acceptable? Ian. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
