Am Dienstag, 4. April 2006 21:27 schrieb Joerg Platte: Hi! > To find this problem, I enabled debugging in the esp.c file and printed the > mapped address (after iommu mapping). In some cases the mapped address is > zero:
> ESP: DMA address 0beb8000 > ESP: DMA address 00000000 I didn't find a manual of the SBUS IOMMU. But if I understand the contents of newer implementations of an IOMMU, each entry in this MMU table has a valid bit. And therefore, a 0 entry is invalid. But the current implementation of qemu's IOMMU does not check for a valid bit. Where can I find more information on this topic? And is a besser IOMMU currently in development? regards, Jörg _______________________________________________ Qemu-devel mailing list Qemu-devel@nongnu.org http://lists.nongnu.org/mailman/listinfo/qemu-devel
