diff options
| -rw-r--r-- | arch/powerpc/mm/numa.c | 101 |
1 files changed, 83 insertions, 18 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 39328da32ed..cf4bffba6f7 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -901,6 +901,79 @@ early_param("numa", early_numa); #ifdef CONFIG_MEMORY_HOTPLUG /* + * Validate the node associated with the memory section we are + * trying to add. + */ +int valid_hot_add_scn(int *nid, unsigned long start, u32 lmb_size, + unsigned long scn_addr) +{ + nodemask_t nodes; + + if (*nid < 0 || !node_online(*nid)) + *nid = any_online_node(NODE_MASK_ALL); + + if ((scn_addr >= start) && (scn_addr < (start + lmb_size))) { + nodes_setall(nodes); + while (NODE_DATA(*nid)->node_spanned_pages == 0) { + node_clear(*nid, nodes); + *nid = any_online_node(nodes); + } + + return 1; + } + + return 0; +} + +/* + * Find the node associated with a hot added memory section represented + * by the ibm,dynamic-reconfiguration-memory node. + */ +static int hot_add_drconf_scn_to_nid(struct device_node *memory, + unsigned long scn_addr) +{ + const u32 *dm; + unsigned int n, rc; + unsigned long lmb_size; + int default_nid = any_online_node(NODE_MASK_ALL); + int nid; + struct assoc_arrays aa; + + n = of_get_drconf_memory(memory, &dm); + if (!n) + return default_nid;; + + lmb_size = of_get_lmb_size(memory); + if (!lmb_size) + return default_nid; + + rc = of_get_assoc_arrays(memory, &aa); + if (rc) + return default_nid; + + for (; n != 0; --n) { + struct of_drconf_cell drmem; + + read_drconf_cell(&drmem, &dm); + + /* skip this block if it is reserved or not assigned to + * this partition */ + if ((drmem.flags & DRCONF_MEM_RESERVED) + || !(drmem.flags & DRCONF_MEM_ASSIGNED)) + continue; + + nid = of_drconf_to_nid_single(&drmem, &aa); + + if (valid_hot_add_scn(&nid, drmem.base_addr, lmb_size, + scn_addr)) + return nid; + } + + BUG(); /* section address should be found above */ + return 0; +} + +/* * Find the node associated with a hot added memory section. Section * corresponds to a SPARSEMEM section, not an LMB. It is assumed that * sections are fully contained within a single LMB. @@ -908,12 +981,17 @@ early_param("numa", early_numa); int hot_add_scn_to_nid(unsigned long scn_addr) { struct device_node *memory = NULL; - nodemask_t nodes; - int default_nid = any_online_node(NODE_MASK_ALL); int nid; if (!numa_enabled || (min_common_depth < 0)) - return default_nid; + return any_online_node(NODE_MASK_ALL); + + memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); + if (memory) { + nid = hot_add_drconf_scn_to_nid(memory, scn_addr); + of_node_put(memory); + return nid; + } while ((memory = of_find_node_by_type(memory, "memory")) != NULL) { unsigned long start, size; @@ -932,13 +1010,9 @@ ha_new_range: size = read_n_cells(n_mem_size_cells, &memcell_buf); nid = of_node_to_nid_single(memory); - /* Domains not present at boot default to 0 */ - if (nid < 0 || !node_online(nid)) - nid = default_nid; - - if ((scn_addr >= start) && (scn_addr < (start + size))) { + if (valid_hot_add_scn(&nid, start, size, scn_addr)) { of_node_put(memory); - goto got_nid; + return nid; } if (--ranges) /* process all ranges in cell */ @@ -946,14 +1020,5 @@ ha_new_range: } BUG(); /* section address should be found above */ return 0; - - /* Temporary code to ensure that returned node is not empty */ -got_nid: - nodes_setall(nodes); - while (NODE_DATA(nid)->node_spanned_pages == 0) { - node_clear(nid, nodes); - nid = any_online_node(nodes); - } - return nid; } #endif /* CONFIG_MEMORY_HOTPLUG */ |