On Thu, Sep 27, 2018 at 10:54:16AM -0600, Logan Gunthorpe wrote: > Register the CMB buffer as p2pmem and use the appropriate allocation > functions to create and destroy the IO submission queues. > > If the CMB supports WDS and RDS, publish it for use as P2P memory > by other devices. > > Kernels without CONFIG_PCI_P2PDMA will also no longer support NVMe CMB. > However, seeing the main use-cases for the CMB is P2P operations, > this seems like a reasonable dependency. > > We drop the __iomem safety on the buffer seeing that, by convention, it's > safe to directly access memory mapped by memremap()/devm_memremap_pages(). > Architectures where this is not safe will not be supported by memremap() > and therefore will not be support PCI P2P and have no support for CMB. > > Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx> Looks good to me. Reviewed-by: Keith Busch <keith.busch@xxxxxxxxx>
