On Mar 5, 2015 3:55 AM, "Boaz Harrosh" <b...@plexistor.com> wrote: > > From: Ross Zwisler <ross.zwis...@linux.intel.com> > > PMEM is a new driver That supports any physical contiguous iomem range > as a single block device. The driver has support for as many as needed > iomem ranges each as its own device. > > The driver is not only good for NvDIMMs, It is good for any flat memory > mapped device. We've used it with NvDIMMs, Kernel reserved DRAM > (memmap= on command line), PCIE Battery backed memory cards, VM shared > memory, and so on. > > The API to pmem module a single string parameter named "map" > of the form: > map=mapS[,mapS...] > > where mapS=nn[KMG]$ss[KMG], > or mapS=nn[KMG]@ss[KMG], > > nn=size, ss=offset > > Just like the Kernel command line map && memmap parameters, > so anything you did at grub just copy/paste to here. > > The "@" form is exactly the same as the "$" form only that > at bash prompt we need to escape the "$" with \$ so also > support the '@' char for convenience. > > For each specified mapS there will be a device created.
[...] > + pmem->virt_addr = ioremap_cache(pmem->phys_addr, pmem->size); I think it would be nice to have control over the caching mode. Depending on the application, WT or UC could make more sense. --Andy -- 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/
