On Tue, Sep 29, 2015 at 11:27:14AM +0200, Thierry Reding wrote: > On Tue, Sep 29, 2015 at 02:25:23PM +0900, Tomasz Figa wrote: > > 3) possibility of exporting the iommu_flush() operation and providing > > unsynchronized map/unmap operations for subsystems with even higher > > requirements for performance (e.g. drivers/gpu/drm). > > That would require passing in some sort of flag that the core shouldn't > be flushing itself, right? Currently it would flush on every map/unmap. Not necessarily. Introducing a flag would require updating all callers, so while at it we could also just change the semantics of map/unmap to require an explicit flush afterwards (only if it turns out that such an iommu_flush() function is really needed). Joerg -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
