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Diffstat (limited to 'arch/s390/numa/mode_emu.c')
-rw-r--r--arch/s390/numa/mode_emu.c38
1 files changed, 29 insertions, 9 deletions
diff --git a/arch/s390/numa/mode_emu.c b/arch/s390/numa/mode_emu.c
index 37e0bb835516..cfd08384f0ab 100644
--- a/arch/s390/numa/mode_emu.c
+++ b/arch/s390/numa/mode_emu.c
@@ -21,6 +21,7 @@
#include <linux/kernel.h>
#include <linux/cpumask.h>
#include <linux/memblock.h>
+#include <linux/bootmem.h>
#include <linux/node.h>
#include <linux/memory.h>
#include <linux/slab.h>
@@ -307,13 +308,11 @@ fail:
/*
* Allocate and initialize core to node mapping
*/
-static void create_core_to_node_map(void)
+static void __ref create_core_to_node_map(void)
{
int i;
- emu_cores = kzalloc(sizeof(*emu_cores), GFP_KERNEL);
- if (emu_cores == NULL)
- panic("Could not allocate cores to node memory");
+ emu_cores = memblock_virt_alloc(sizeof(*emu_cores), 8);
for (i = 0; i < ARRAY_SIZE(emu_cores->to_node_id); i++)
emu_cores->to_node_id[i] = NODE_ID_FREE;
}
@@ -354,13 +353,13 @@ static struct toptree *toptree_from_topology(void)
phys = toptree_new(TOPTREE_ID_PHYS, 1);
- for_each_online_cpu(cpu) {
- top = &per_cpu(cpu_topology, cpu);
+ for_each_cpu(cpu, &cpus_with_topology) {
+ top = &cpu_topology[cpu];
node = toptree_get_child(phys, 0);
drawer = toptree_get_child(node, top->drawer_id);
book = toptree_get_child(drawer, top->book_id);
mc = toptree_get_child(book, top->socket_id);
- core = toptree_get_child(mc, top->core_id);
+ core = toptree_get_child(mc, smp_get_base_cpu(cpu));
if (!drawer || !book || !mc || !core)
panic("NUMA emulation could not allocate memory");
cpumask_set_cpu(cpu, &core->mask);
@@ -378,7 +377,7 @@ static void topology_add_core(struct toptree *core)
int cpu;
for_each_cpu(cpu, &core->mask) {
- top = &per_cpu(cpu_topology, cpu);
+ top = &cpu_topology[cpu];
cpumask_copy(&top->thread_mask, &core->mask);
cpumask_copy(&top->core_mask, &core_mc(core)->mask);
cpumask_copy(&top->book_mask, &core_book(core)->mask);
@@ -425,6 +424,27 @@ static void print_node_to_core_map(void)
}
}
+static void pin_all_possible_cpus(void)
+{
+ int core_id, node_id, cpu;
+ static int initialized;
+
+ if (initialized)
+ return;
+ print_node_to_core_map();
+ node_id = 0;
+ for_each_possible_cpu(cpu) {
+ core_id = smp_get_base_cpu(cpu);
+ if (emu_cores->to_node_id[core_id] != NODE_ID_FREE)
+ continue;
+ pin_core_to_node(core_id, node_id);
+ cpu_topology[cpu].node_id = node_id;
+ node_id = (node_id + 1) % emu_nodes;
+ }
+ print_node_to_core_map();
+ initialized = 1;
+}
+
/*
* Transfer physical topology into a NUMA topology and modify CPU masks
* according to the NUMA topology.
@@ -442,7 +462,7 @@ static void emu_update_cpu_topology(void)
toptree_free(phys);
toptree_to_topology(numa);
toptree_free(numa);
- print_node_to_core_map();
+ pin_all_possible_cpus();
}
/*