> +#define iowrite64be(v,p) iowrite32(cpu_to_be64(v), (p))
Logan, thanks for taking this cleanup on. I think this should be iowrite64 not
iowrite32?
Stephen
Hi All
I am hoping someone can help shed some light on an issue I am seeing with my
attempt to add p2pmem [1] to the ppc64el kernel. p2pmem is a (currently)
out-of-tree patchset that allows one to add device memory with struct page
backing into the Linux kernel. It leverages MEMORY_HOTPLUG and
> I am guessing that the hotplug of ZONE_DEVICE memory was done
> incorrectly as it lead to HPT resizing (the system thinking this is
> normal memory). Ideally one would expect that the driver would online
> ZONE_DEVICE memory and not go through the HOTPLUG path. Are you using
> devm_memremap_page
> [3.537780] lpar: Attempting to resize HPT to shift 21
> [3.539251] Unable to resize hash page table to target order 21: -1
> [3.541079] Unable to create mapping for hot added memory
> 0xc0002100..0xc00021000400: -2
> For #1 above please check if your qemu supports H_RES
Oliver
>The alternative approach you mentioned that uses ioremap() should work
>fine though.
Great, thanks for this useful information Oliver. I am working on rebasing the
ioremap()
patch on 4.14 and will let you know how it goes.
> Also, Alexy (+cc) said he was interested in trying this on s
