diff options
| -rw-r--r-- | arch/powerpc/include/asm/topology.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/numa.c | 212 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pseries/hotplug-memory.c | 2 |
4 files changed, 161 insertions, 57 deletions
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h index e4db64c0e184..a6425a70c37b 100644 --- a/arch/powerpc/include/asm/topology.h +++ b/arch/powerpc/include/asm/topology.h @@ -64,6 +64,7 @@ static inline int early_cpu_to_node(int cpu) } int of_drconf_to_nid_single(struct drmem_lmb *lmb); +void update_numa_distance(struct device_node *node); #else @@ -93,6 +94,7 @@ static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb) return first_online_node; } +static inline void update_numa_distance(struct device_node *node) {} #endif /* CONFIG_NUMA */ #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR) diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 0bad11b3e929..3cda37c52f26 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -208,50 +208,35 @@ int __node_distance(int a, int b) } EXPORT_SYMBOL(__node_distance); -static void initialize_distance_lookup_table(int nid, - const __be32 *associativity) +static int __associativity_to_nid(const __be32 *associativity, + int max_array_sz) { - int i; + int nid; + /* + * primary_domain_index is 1 based array index. + */ + int index = primary_domain_index - 1; - if (affinity_form != FORM1_AFFINITY) - return; + if (!numa_enabled || index >= max_array_sz) + return NUMA_NO_NODE; - for (i = 0; i < distance_ref_points_depth; i++) { - const __be32 *entry; + nid = of_read_number(&associativity[index], 1); - entry = &associativity[be32_to_cpu(distance_ref_points[i]) - 1]; - distance_lookup_table[nid][i] = of_read_number(entry, 1); - } + /* POWER4 LPAR uses 0xffff as invalid node */ + if (nid == 0xffff || nid >= nr_node_ids) + nid = NUMA_NO_NODE; + return nid; } - /* * Returns nid in the range [0..nr_node_ids], or -1 if no useful NUMA * info is found. */ static int associativity_to_nid(const __be32 *associativity) { - int nid = NUMA_NO_NODE; - - if (!numa_enabled) - goto out; - - if (of_read_number(associativity, 1) >= primary_domain_index) - nid = of_read_number(&associativity[primary_domain_index], 1); - - /* POWER4 LPAR uses 0xffff as invalid node */ - if (nid == 0xffff || nid >= nr_node_ids) - nid = NUMA_NO_NODE; - - if (nid > 0 && - of_read_number(associativity, 1) >= distance_ref_points_depth) { - /* - * Skip the length field and send start of associativity array - */ - initialize_distance_lookup_table(nid, associativity + 1); - } + int array_sz = of_read_number(associativity, 1); -out: - return nid; + /* Skip the first element in the associativity array */ + return __associativity_to_nid((associativity + 1), array_sz); } /* Returns the nid associated with the given device tree node, @@ -287,6 +272,60 @@ int of_node_to_nid(struct device_node *device) } EXPORT_SYMBOL(of_node_to_nid); +static void __initialize_form1_numa_distance(const __be32 *associativity, + int max_array_sz) +{ + int i, nid; + + if (affinity_form != FORM1_AFFINITY) + return; + + nid = __associativity_to_nid(associativity, max_array_sz); + if (nid != NUMA_NO_NODE) { + for (i = 0; i < distance_ref_points_depth; i++) { + const __be32 *entry; + int index = be32_to_cpu(distance_ref_points[i]) - 1; + + /* + * broken hierarchy, return with broken distance table + */ + if (WARN(index >= max_array_sz, "Broken ibm,associativity property")) + return; + + entry = &associativity[index]; + distance_lookup_table[nid][i] = of_read_number(entry, 1); + } + } +} + +static void initialize_form1_numa_distance(const __be32 *associativity) +{ + int array_sz; + + array_sz = of_read_number(associativity, 1); + /* Skip the first element in the associativity array */ + __initialize_form1_numa_distance(associativity + 1, array_sz); +} + +/* + * Used to update distance information w.r.t newly added node. + */ +void update_numa_distance(struct device_node *node) +{ + if (affinity_form == FORM0_AFFINITY) + return; + else if (affinity_form == FORM1_AFFINITY) { + const __be32 *associativity; + + associativity = of_get_associativity(node); + if (!associativity) + return; + + initialize_form1_numa_distance(associativity); + return; + } +} + static int __init find_primary_domain_index(void) { int index; @@ -433,6 +472,38 @@ static int of_get_assoc_arrays(struct assoc_arrays *aa) return 0; } +static int get_nid_and_numa_distance(struct drmem_lmb *lmb) +{ + struct assoc_arrays aa = { .arrays = NULL }; + int default_nid = NUMA_NO_NODE; + int nid = default_nid; + int rc, index; + + if ((primary_domain_index < 0) || !numa_enabled) + return default_nid; + + rc = of_get_assoc_arrays(&aa); + if (rc) + return default_nid; + + if (primary_domain_index <= aa.array_sz && + !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) { + const __be32 *associativity; + + index = lmb->aa_index * aa.array_sz; + associativity = &aa.arrays[index]; + nid = __associativity_to_nid(associativity, aa.array_sz); + if (nid > 0 && affinity_form == FORM1_AFFINITY) { + /* + * lookup array associativity entries have + * no length of the array as the first element. + */ + __initialize_form1_numa_distance(associativity, aa.array_sz); + } + } + return nid; +} + /* * This is like of_node_to_nid_single() for memory represented in the * ibm,dynamic-reconfiguration-memory node. @@ -453,26 +524,19 @@ int of_drconf_to_nid_single(struct drmem_lmb *lmb) if (primary_domain_index <= aa.array_sz && !(lmb->flags & DRCONF_MEM_AI_INVALID) && lmb->aa_index < aa.n_arrays) { - index = lmb->aa_index * aa.array_sz + primary_domain_index - 1; - nid = of_read_number(&aa.arrays[index], 1); - - if (nid == 0xffff || nid >= nr_node_ids) - nid = default_nid; + const __be32 *associativity; - if (nid > 0) { - index = lmb->aa_index * aa.array_sz; - initialize_distance_lookup_table(nid, - &aa.arrays[index]); - } + index = lmb->aa_index * aa.array_sz; + associativity = &aa.arrays[index]; + nid = __associativity_to_nid(associativity, aa.array_sz); } - return nid; } #ifdef CONFIG_PPC_SPLPAR -static int vphn_get_nid(long lcpu) + +static int __vphn_get_associativity(long lcpu, __be32 *associativity) { - __be32 associativity[VPHN_ASSOC_BUFSIZE] = {0}; long rc, hwid; /* @@ -492,12 +556,30 @@ static int vphn_get_nid(long lcpu) rc = hcall_vphn(hwid, VPHN_FLAG_VCPU, associativity); if (rc == H_SUCCESS) - return associativity_to_nid(associativity); + return 0; } + return -1; +} + +static int vphn_get_nid(long lcpu) +{ + __be32 associativity[VPHN_ASSOC_BUFSIZE] = {0}; + + + if (!__vphn_get_associativity(lcpu, associativity)) + return associativity_to_nid(associativity); + return NUMA_NO_NODE; + } #else + +static int __vphn_get_associativity(long lcpu, __be32 *associativity) +{ + return -1; +} + static int vphn_get_nid(long unused) { return NUMA_NO_NODE; @@ -692,7 +774,7 @@ static int __init numa_setup_drmem_lmb(struct drmem_lmb *lmb, size = read_n_cells(n_mem_size_cells, usm); } - nid = of_drconf_to_nid_single(lmb); + nid = get_nid_and_numa_distance(lmb); fake_numa_create_new_node(((base + size) >> PAGE_SHIFT), &nid); node_set_online(nid); @@ -709,6 +791,7 @@ static int __init parse_numa_properties(void) struct device_node *memory; int default_nid = 0; unsigned long i; + const __be32 *associativity; if (numa_enabled == 0) { printk(KERN_WARNING "NUMA disabled by user\n"); @@ -734,18 +817,30 @@ static int __init parse_numa_properties(void) * each node to be onlined must have NODE_DATA etc backing it. */ for_each_present_cpu(i) { + __be32 vphn_assoc[VPHN_ASSOC_BUFSIZE]; struct device_node *cpu; - int nid = vphn_get_nid(i); + int nid = NUMA_NO_NODE; - /* - * Don't fall back to default_nid yet -- we will plug - * cpus into nodes once the memory scan has discovered - * the topology. - */ - if (nid == NUMA_NO_NODE) { + memset(vphn_assoc, 0, VPHN_ASSOC_BUFSIZE * sizeof(__be32)); + + if (__vphn_get_associativity(i, vphn_assoc) == 0) { + nid = associativity_to_nid(vphn_assoc); + initialize_form1_numa_distance(vphn_assoc); + } else { + + /* + * Don't fall back to default_nid yet -- we will plug + * cpus into nodes once the memory scan has discovered + * the topology. + */ cpu = of_get_cpu_node(i, NULL); BUG_ON(!cpu); - nid = of_node_to_nid_single(cpu); + + associativity = of_get_associativity(cpu); + if (associativity) { + nid = associativity_to_nid(associativity); + initialize_form1_numa_distance(associativity); + } of_node_put(cpu); } @@ -781,8 +876,11 @@ new_range: * have associativity properties. If none, then * everything goes to default_nid. */ - nid = of_node_to_nid_single(memory); - if (nid < 0) + associativity = of_get_associativity(memory); + if (associativity) { + nid = associativity_to_nid(associativity); + initialize_form1_numa_distance(associativity); + } else nid = default_nid; fake_numa_create_new_node(((start + size) >> PAGE_SHIFT), &nid); diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c index e1f224320102..1ef40ef699a6 100644 --- a/arch/powerpc/platforms/pseries/hotplug-cpu.c +++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c @@ -580,6 +580,8 @@ static ssize_t dlpar_cpu_add(u32 drc_index) return saved_rc; } + update_numa_distance(dn); + rc = dlpar_online_cpu(dn); if (rc) { saved_rc = rc; diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c index 0beb3ca2b549..14fccd7b9c99 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -180,6 +180,8 @@ static int update_lmb_associativity_index(struct drmem_lmb *lmb) return -ENODEV; } + update_numa_distance(lmb_node); + dr_node = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); if (!dr_node) { dlpar_free_cc_nodes(lmb_node); |