#include <linux/init.h>
#include <linux/list.h>
#include <linux/list_sort.h>
+#include <linux/memory.h>
+#include <linux/mutex.h>
#include <linux/node.h>
#include <linux/sysfs.h>
-static __initdata u8 hmat_revision;
+static u8 hmat_revision;
-static __initdata LIST_HEAD(targets);
-static __initdata LIST_HEAD(initiators);
-static __initdata LIST_HEAD(localities);
+static LIST_HEAD(targets);
+static LIST_HEAD(initiators);
+static LIST_HEAD(localities);
+
+static DEFINE_MUTEX(target_lock);
/*
* The defined enum order is used to prioritize attributes to break ties when
static struct memory_locality *localities_types[4];
+struct target_cache {
+ struct list_head node;
+ struct node_cache_attrs cache_attrs;
+};
+
struct memory_target {
struct list_head node;
unsigned int memory_pxm;
unsigned int processor_pxm;
struct node_hmem_attrs hmem_attrs;
+ struct list_head caches;
+ struct node_cache_attrs cache_attrs;
+ bool registered;
};
struct memory_initiator {
struct acpi_hmat_locality *hmat_loc;
};
-static __init struct memory_initiator *find_mem_initiator(unsigned int cpu_pxm)
+static struct memory_initiator *find_mem_initiator(unsigned int cpu_pxm)
{
struct memory_initiator *initiator;
return NULL;
}
-static __init struct memory_target *find_mem_target(unsigned int mem_pxm)
+static struct memory_target *find_mem_target(unsigned int mem_pxm)
{
struct memory_target *target;
{
struct memory_target *target;
- if (pxm_to_node(mem_pxm) == NUMA_NO_NODE)
- return;
-
target = find_mem_target(mem_pxm);
if (target)
return;
target->memory_pxm = mem_pxm;
target->processor_pxm = PXM_INVAL;
list_add_tail(&target->node, &targets);
+ INIT_LIST_HEAD(&target->caches);
}
static __init const char *hmat_data_type(u8 type)
}
}
-static __init u32 hmat_normalize(u16 entry, u64 base, u8 type)
+static u32 hmat_normalize(u16 entry, u64 base, u8 type)
{
u32 value;
return value;
}
-static __init void hmat_update_target_access(struct memory_target *target,
+static void hmat_update_target_access(struct memory_target *target,
u8 type, u32 value)
{
switch (type) {
const unsigned long end)
{
struct acpi_hmat_cache *cache = (void *)header;
- struct node_cache_attrs cache_attrs;
+ struct memory_target *target;
+ struct target_cache *tcache;
u32 attrs;
if (cache->header.length < sizeof(*cache)) {
cache->memory_PD, cache->cache_size, attrs,
cache->number_of_SMBIOShandles);
- cache_attrs.size = cache->cache_size;
- cache_attrs.level = (attrs & ACPI_HMAT_CACHE_LEVEL) >> 4;
- cache_attrs.line_size = (attrs & ACPI_HMAT_CACHE_LINE_SIZE) >> 16;
+ target = find_mem_target(cache->memory_PD);
+ if (!target)
+ return 0;
+
+ tcache = kzalloc(sizeof(*tcache), GFP_KERNEL);
+ if (!tcache) {
+ pr_notice_once("Failed to allocate HMAT cache info\n");
+ return 0;
+ }
+
+ tcache->cache_attrs.size = cache->cache_size;
+ tcache->cache_attrs.level = (attrs & ACPI_HMAT_CACHE_LEVEL) >> 4;
+ tcache->cache_attrs.line_size = (attrs & ACPI_HMAT_CACHE_LINE_SIZE) >> 16;
switch ((attrs & ACPI_HMAT_CACHE_ASSOCIATIVITY) >> 8) {
case ACPI_HMAT_CA_DIRECT_MAPPED:
- cache_attrs.indexing = NODE_CACHE_DIRECT_MAP;
+ tcache->cache_attrs.indexing = NODE_CACHE_DIRECT_MAP;
break;
case ACPI_HMAT_CA_COMPLEX_CACHE_INDEXING:
- cache_attrs.indexing = NODE_CACHE_INDEXED;
+ tcache->cache_attrs.indexing = NODE_CACHE_INDEXED;
break;
case ACPI_HMAT_CA_NONE:
default:
- cache_attrs.indexing = NODE_CACHE_OTHER;
+ tcache->cache_attrs.indexing = NODE_CACHE_OTHER;
break;
}
switch ((attrs & ACPI_HMAT_WRITE_POLICY) >> 12) {
case ACPI_HMAT_CP_WB:
- cache_attrs.write_policy = NODE_CACHE_WRITE_BACK;
+ tcache->cache_attrs.write_policy = NODE_CACHE_WRITE_BACK;
break;
case ACPI_HMAT_CP_WT:
- cache_attrs.write_policy = NODE_CACHE_WRITE_THROUGH;
+ tcache->cache_attrs.write_policy = NODE_CACHE_WRITE_THROUGH;
break;
case ACPI_HMAT_CP_NONE:
default:
- cache_attrs.write_policy = NODE_CACHE_WRITE_OTHER;
+ tcache->cache_attrs.write_policy = NODE_CACHE_WRITE_OTHER;
break;
}
+ list_add_tail(&tcache->node, &target->caches);
- node_add_cache(pxm_to_node(cache->memory_PD), &cache_attrs);
return 0;
}
return 0;
}
-static __init u32 hmat_initiator_perf(struct memory_target *target,
+static u32 hmat_initiator_perf(struct memory_target *target,
struct memory_initiator *initiator,
struct acpi_hmat_locality *hmat_loc)
{
hmat_loc->data_type);
}
-static __init bool hmat_update_best(u8 type, u32 value, u32 *best)
+static bool hmat_update_best(u8 type, u32 value, u32 *best)
{
bool updated = false;
return ia->processor_pxm - ib->processor_pxm;
}
-static __init void hmat_register_target_initiators(struct memory_target *target)
+static void hmat_register_target_initiators(struct memory_target *target)
{
static DECLARE_BITMAP(p_nodes, MAX_NUMNODES);
struct memory_initiator *initiator;
}
}
-static __init void hmat_register_target_perf(struct memory_target *target)
+static void hmat_register_target_cache(struct memory_target *target)
+{
+ unsigned mem_nid = pxm_to_node(target->memory_pxm);
+ struct target_cache *tcache;
+
+ list_for_each_entry(tcache, &target->caches, node)
+ node_add_cache(mem_nid, &tcache->cache_attrs);
+}
+
+static void hmat_register_target_perf(struct memory_target *target)
{
unsigned mem_nid = pxm_to_node(target->memory_pxm);
node_set_perf_attrs(mem_nid, &target->hmem_attrs, 0);
}
-static __init void hmat_register_targets(void)
+static void hmat_register_target(struct memory_target *target)
{
- struct memory_target *target;
+ int nid = pxm_to_node(target->memory_pxm);
- list_for_each_entry(target, &targets, node) {
+ /*
+ * Skip offline nodes. This can happen when memory
+ * marked EFI_MEMORY_SP, "specific purpose", is applied
+ * to all the memory in a promixity domain leading to
+ * the node being marked offline / unplugged, or if
+ * memory-only "hotplug" node is offline.
+ */
+ if (nid == NUMA_NO_NODE || !node_online(nid))
+ return;
+
+ mutex_lock(&target_lock);
+ if (!target->registered) {
hmat_register_target_initiators(target);
+ hmat_register_target_cache(target);
hmat_register_target_perf(target);
+ target->registered = true;
}
+ mutex_unlock(&target_lock);
+}
+
+static void hmat_register_targets(void)
+{
+ struct memory_target *target;
+
+ list_for_each_entry(target, &targets, node)
+ hmat_register_target(target);
+}
+
+static int hmat_callback(struct notifier_block *self,
+ unsigned long action, void *arg)
+{
+ struct memory_target *target;
+ struct memory_notify *mnb = arg;
+ int pxm, nid = mnb->status_change_nid;
+
+ if (nid == NUMA_NO_NODE || action != MEM_ONLINE)
+ return NOTIFY_OK;
+
+ pxm = node_to_pxm(nid);
+ target = find_mem_target(pxm);
+ if (!target)
+ return NOTIFY_OK;
+
+ hmat_register_target(target);
+ return NOTIFY_OK;
}
+static struct notifier_block hmat_callback_nb = {
+ .notifier_call = hmat_callback,
+ .priority = 2,
+};
+
static __init void hmat_free_structures(void)
{
struct memory_target *target, *tnext;
struct memory_locality *loc, *lnext;
struct memory_initiator *initiator, *inext;
+ struct target_cache *tcache, *cnext;
list_for_each_entry_safe(target, tnext, &targets, node) {
+ list_for_each_entry_safe(tcache, cnext, &target->caches, node) {
+ list_del(&tcache->node);
+ kfree(tcache);
+ }
list_del(&target->node);
kfree(target);
}
}
}
hmat_register_targets();
+
+ /* Keep the table and structures if the notifier may use them */
+ if (!register_hotmemory_notifier(&hmat_callback_nb))
+ return 0;
out_put:
hmat_free_structures();
acpi_put_table(tbl);
projects / linux-2.6-microblaze.git / commitdiff