summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/smpboot.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/smpboot.c')
-rw-r--r--arch/x86/kernel/smpboot.c272
1 files changed, 28 insertions, 244 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 3f57ce68a3..76bb65045c 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -101,10 +101,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_core_map);
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
EXPORT_PER_CPU_SYMBOL(cpu_die_map);
-/* Per CPU bogomips and other parameters */
-DEFINE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info);
-EXPORT_PER_CPU_SYMBOL(cpu_info);
-
/* CPUs which are the primary SMT threads */
struct cpumask __cpu_primary_thread_mask __read_mostly;
@@ -125,25 +121,6 @@ struct mwait_cpu_dead {
*/
static DEFINE_PER_CPU_ALIGNED(struct mwait_cpu_dead, mwait_cpu_dead);
-/* Logical package management. */
-struct logical_maps {
- u32 phys_pkg_id;
- u32 phys_die_id;
- u32 logical_pkg_id;
- u32 logical_die_id;
-};
-
-/* Temporary workaround until the full topology mechanics is in place */
-static DEFINE_PER_CPU_READ_MOSTLY(struct logical_maps, logical_maps) = {
- .phys_pkg_id = U32_MAX,
- .phys_die_id = U32_MAX,
-};
-
-unsigned int __max_logical_packages __read_mostly;
-EXPORT_SYMBOL(__max_logical_packages);
-static unsigned int logical_packages __read_mostly;
-static unsigned int logical_die __read_mostly;
-
/* Maximum number of SMT threads on any online core */
int __read_mostly __max_smt_threads = 1;
@@ -336,106 +313,6 @@ static void notrace start_secondary(void *unused)
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
-/**
- * topology_phys_to_logical_pkg - Map a physical package id to a logical
- * @phys_pkg: The physical package id to map
- *
- * Returns logical package id or -1 if not found
- */
-int topology_phys_to_logical_pkg(unsigned int phys_pkg)
-{
- int cpu;
-
- for_each_possible_cpu(cpu) {
- if (per_cpu(logical_maps.phys_pkg_id, cpu) == phys_pkg)
- return per_cpu(logical_maps.logical_pkg_id, cpu);
- }
- return -1;
-}
-EXPORT_SYMBOL(topology_phys_to_logical_pkg);
-
-/**
- * topology_phys_to_logical_die - Map a physical die id to logical
- * @die_id: The physical die id to map
- * @cur_cpu: The CPU for which the mapping is done
- *
- * Returns logical die id or -1 if not found
- */
-static int topology_phys_to_logical_die(unsigned int die_id, unsigned int cur_cpu)
-{
- int cpu, proc_id = cpu_data(cur_cpu).topo.pkg_id;
-
- for_each_possible_cpu(cpu) {
- if (per_cpu(logical_maps.phys_pkg_id, cpu) == proc_id &&
- per_cpu(logical_maps.phys_die_id, cpu) == die_id)
- return per_cpu(logical_maps.logical_die_id, cpu);
- }
- return -1;
-}
-
-/**
- * topology_update_package_map - Update the physical to logical package map
- * @pkg: The physical package id as retrieved via CPUID
- * @cpu: The cpu for which this is updated
- */
-int topology_update_package_map(unsigned int pkg, unsigned int cpu)
-{
- int new;
-
- /* Already available somewhere? */
- new = topology_phys_to_logical_pkg(pkg);
- if (new >= 0)
- goto found;
-
- new = logical_packages++;
- if (new != pkg) {
- pr_info("CPU %u Converting physical %u to logical package %u\n",
- cpu, pkg, new);
- }
-found:
- per_cpu(logical_maps.phys_pkg_id, cpu) = pkg;
- per_cpu(logical_maps.logical_pkg_id, cpu) = new;
- cpu_data(cpu).topo.logical_pkg_id = new;
- return 0;
-}
-/**
- * topology_update_die_map - Update the physical to logical die map
- * @die: The die id as retrieved via CPUID
- * @cpu: The cpu for which this is updated
- */
-int topology_update_die_map(unsigned int die, unsigned int cpu)
-{
- int new;
-
- /* Already available somewhere? */
- new = topology_phys_to_logical_die(die, cpu);
- if (new >= 0)
- goto found;
-
- new = logical_die++;
- if (new != die) {
- pr_info("CPU %u Converting physical %u to logical die %u\n",
- cpu, die, new);
- }
-found:
- per_cpu(logical_maps.phys_die_id, cpu) = die;
- per_cpu(logical_maps.logical_die_id, cpu) = new;
- cpu_data(cpu).topo.logical_die_id = new;
- return 0;
-}
-
-static void __init smp_store_boot_cpu_info(void)
-{
- int id = 0; /* CPU 0 */
- struct cpuinfo_x86 *c = &cpu_data(id);
-
- *c = boot_cpu_data;
- c->cpu_index = id;
- topology_update_package_map(c->topo.pkg_id, id);
- topology_update_die_map(c->topo.die_id, id);
- c->initialized = true;
-}
-
/*
* The bootstrap kernel entry code has set these up. Save them for
* a given CPU
@@ -488,6 +365,7 @@ static bool match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
if (c->topo.pkg_id == o->topo.pkg_id &&
c->topo.die_id == o->topo.die_id &&
+ c->topo.amd_node_id == o->topo.amd_node_id &&
per_cpu_llc_id(cpu1) == per_cpu_llc_id(cpu2)) {
if (c->topo.core_id == o->topo.core_id)
return topology_sane(c, o, "smt");
@@ -509,10 +387,13 @@ static bool match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
{
- if (c->topo.pkg_id == o->topo.pkg_id &&
- c->topo.die_id == o->topo.die_id)
- return true;
- return false;
+ if (c->topo.pkg_id != o->topo.pkg_id || c->topo.die_id != o->topo.die_id)
+ return false;
+
+ if (cpu_feature_enabled(X86_FEATURE_TOPOEXT) && topology_amd_nodes_per_pkg() > 1)
+ return c->topo.amd_node_id == o->topo.amd_node_id;
+
+ return true;
}
static bool match_l2c(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
@@ -670,8 +551,8 @@ static void __init build_sched_topology(void)
void set_cpu_sibling_map(int cpu)
{
- bool has_smt = smp_num_siblings > 1;
- bool has_mp = has_smt || boot_cpu_data.x86_max_cores > 1;
+ bool has_smt = __max_threads_per_core > 1;
+ bool has_mp = has_smt || topology_num_cores_per_package() > 1;
struct cpuinfo_x86 *c = &cpu_data(cpu);
struct cpuinfo_x86 *o;
int i, threads;
@@ -1068,9 +949,13 @@ int native_kick_ap(unsigned int cpu, struct task_struct *tidle)
pr_debug("++++++++++++++++++++=_---CPU UP %u\n", cpu);
- if (apicid == BAD_APICID || !physid_isset(apicid, phys_cpu_present_map) ||
- !apic_id_valid(apicid)) {
- pr_err("%s: bad cpu %d\n", __func__, cpu);
+ if (apicid == BAD_APICID || !apic_id_valid(apicid)) {
+ pr_err("CPU %u has invalid APIC ID %x. Aborting bringup\n", cpu, apicid);
+ return -EINVAL;
+ }
+
+ if (!test_bit(apicid, phys_cpu_present_map)) {
+ pr_err("CPU %u APIC ID %x is not present. Aborting bringup\n", cpu, apicid);
return -EINVAL;
}
@@ -1139,42 +1024,22 @@ static __init void disable_smp(void)
pr_info("SMP disabled\n");
disable_ioapic_support();
+ topology_reset_possible_cpus_up();
- init_cpu_present(cpumask_of(0));
- init_cpu_possible(cpumask_of(0));
-
- if (smp_found_config)
- physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
- else
- physid_set_mask_of_physid(0, &phys_cpu_present_map);
cpumask_set_cpu(0, topology_sibling_cpumask(0));
cpumask_set_cpu(0, topology_core_cpumask(0));
cpumask_set_cpu(0, topology_die_cpumask(0));
}
-static void __init smp_cpu_index_default(void)
-{
- int i;
- struct cpuinfo_x86 *c;
-
- for_each_possible_cpu(i) {
- c = &cpu_data(i);
- /* mark all to hotplug */
- c->cpu_index = nr_cpu_ids;
- }
-}
-
void __init smp_prepare_cpus_common(void)
{
unsigned int i;
- smp_cpu_index_default();
-
- /*
- * Setup boot CPU information
- */
- smp_store_boot_cpu_info(); /* Final full version of the data */
- mb();
+ /* Mark all except the boot CPU as hotpluggable */
+ for_each_possible_cpu(i) {
+ if (i)
+ per_cpu(cpu_info.cpu_index, i) = nr_cpu_ids;
+ }
for_each_possible_cpu(i) {
zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL);
@@ -1187,6 +1052,11 @@ void __init smp_prepare_cpus_common(void)
set_cpu_sibling_map(0);
}
+void __init smp_prepare_boot_cpu(void)
+{
+ smp_ops.smp_prepare_boot_cpu();
+}
+
#ifdef CONFIG_X86_64
/* Establish whether parallel bringup can be supported. */
bool __init arch_cpuhp_init_parallel_bringup(void)
@@ -1265,102 +1135,16 @@ void __init native_smp_prepare_boot_cpu(void)
native_pv_lock_init();
}
-void __init calculate_max_logical_packages(void)
-{
- int ncpus;
-
- /*
- * Today neither Intel nor AMD support heterogeneous systems so
- * extrapolate the boot cpu's data to all packages.
- */
- ncpus = cpu_data(0).booted_cores * topology_max_smt_threads();
- __max_logical_packages = DIV_ROUND_UP(total_cpus, ncpus);
- pr_info("Max logical packages: %u\n", __max_logical_packages);
-}
-
void __init native_smp_cpus_done(unsigned int max_cpus)
{
pr_debug("Boot done\n");
- calculate_max_logical_packages();
build_sched_topology();
nmi_selftest();
impress_friends();
cache_aps_init();
}
-static int __initdata setup_possible_cpus = -1;
-static int __init _setup_possible_cpus(char *str)
-{
- get_option(&str, &setup_possible_cpus);
- return 0;
-}
-early_param("possible_cpus", _setup_possible_cpus);
-
-
-/*
- * cpu_possible_mask should be static, it cannot change as cpu's
- * are onlined, or offlined. The reason is per-cpu data-structures
- * are allocated by some modules at init time, and don't expect to
- * do this dynamically on cpu arrival/departure.
- * cpu_present_mask on the other hand can change dynamically.
- * In case when cpu_hotplug is not compiled, then we resort to current
- * behaviour, which is cpu_possible == cpu_present.
- * - Ashok Raj
- *
- * Three ways to find out the number of additional hotplug CPUs:
- * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
- * - The user can overwrite it with possible_cpus=NUM
- * - Otherwise don't reserve additional CPUs.
- * We do this because additional CPUs waste a lot of memory.
- * -AK
- */
-__init void prefill_possible_map(void)
-{
- int i, possible;
-
- i = setup_max_cpus ?: 1;
- if (setup_possible_cpus == -1) {
- possible = num_processors;
-#ifdef CONFIG_HOTPLUG_CPU
- if (setup_max_cpus)
- possible += disabled_cpus;
-#else
- if (possible > i)
- possible = i;
-#endif
- } else
- possible = setup_possible_cpus;
-
- total_cpus = max_t(int, possible, num_processors + disabled_cpus);
-
- /* nr_cpu_ids could be reduced via nr_cpus= */
- if (possible > nr_cpu_ids) {
- pr_warn("%d Processors exceeds NR_CPUS limit of %u\n",
- possible, nr_cpu_ids);
- possible = nr_cpu_ids;
- }
-
-#ifdef CONFIG_HOTPLUG_CPU
- if (!setup_max_cpus)
-#endif
- if (possible > i) {
- pr_warn("%d Processors exceeds max_cpus limit of %u\n",
- possible, setup_max_cpus);
- possible = i;
- }
-
- set_nr_cpu_ids(possible);
-
- pr_info("Allowing %d CPUs, %d hotplug CPUs\n",
- possible, max_t(int, possible - num_processors, 0));
-
- reset_cpu_possible_mask();
-
- for (i = 0; i < possible; i++)
- set_cpu_possible(i, true);
-}
-
/* correctly size the local cpu masks */
void __init setup_cpu_local_masks(void)
{