> > Third would be having a firewall in 2D driver checking the stream and > ensuring all registers that accept addresses are written by values > derived from dmabufs. I haven't tried implementing this, but it'd > involve a lookup table in kernel and CPU reading through the command > stream. Offsets and sizes would also need to be validated. There would > be a performance hit.
This is the standard mechanism, and what exynos does as well. The per process VM method is also used as an extension to this on some hw. Dave. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
