On Mon, Feb 24, 2014 at 12:19:11PM +0000, Stefano Stabellini wrote: > CC'ing Greg. > > On Thu, 20 Feb 2014, Ian Campbell wrote: > > On Thu, 2014-02-20 at 16:21 +0000, Julien Grall wrote: > > > Only Xen is able to know if a device can safely avoid to use xen-swiotlb. > > > This patch introduce a new property "protected-devices" for the hypervisor > > > node which list device which the IOMMU are been correctly programmed by Xen. > > > > > > During Linux boot, Xen specific code will create an hash table which > > > contains all these devices. The hash table will be used in need_xen_dma_ops > > > to check if the Xen DMA ops needs to be used for the current device. > > > > Is it out of the question to find a field within struct device itself to > > store this e.g. in struct device_dma_parameters perhaps and avoid the > > need for a hashtable lookup. > > > > device->iommu_group might be another option, if we can create our own > > group? > > I agree that a field in struct device would be ideal. > Greg, get_maintainer.pl points at you as main maintainer of device.h, do > you have an opinion on this? I need a whole lot more context here please. With a patch would be even better so that I know exactly what you are referring to... -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
