spapr: Add LMB DR connectors
Enable memory hotplug for pseries 2.4 and add LMB DR connectors. With memory hotplug, enforce RAM size, NUMA node memory size and maxmem to be a multiple of SPAPR_MEMORY_BLOCK_SIZE (256M) since that's the granularity in which LMBs are represented and hot-added. LMB DR connectors will be used by the memory hotplug code. Signed-off-by: NBharata B Rao <bharata@linux.vnet.ibm.com> Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com> [spapr_drc_reset implementation] [since this missed the 2.4 cutoff, changing to only enable for 2.5] Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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