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Date: Tue, 21 Feb 2012 21:45:43 -0400
From: Kevin Winchester <kjwinchester@...il.com>
To: Ingo Molnar <mingo@...e.hu>
Cc: Kevin Winchester <kjwinchester@...il.com>,
"H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Borislav Petkov <bp@...en8.de>,
Randy Dunlap <rdunlap@...otime.net>,
Nick Bowler <nbowler@...iptictech.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/5] x86: Move per cpu cpu_core_map to a field in struct cpuinfo_x86
This simplifies the various code paths using this field as it
groups the per-cpu data together.
Acked-by: Borislav Petkov <bp@...en8.de>
Signed-off-by: Kevin Winchester <kjwinchester@...il.com>
---
arch/x86/include/asm/processor.h | 5 +++++
arch/x86/include/asm/smp.h | 6 ------
arch/x86/include/asm/topology.h | 4 ++--
arch/x86/kernel/cpu/proc.c | 3 +--
arch/x86/kernel/smpboot.c | 35 ++++++++++++++---------------------
arch/x86/xen/smp.c | 4 ----
drivers/cpufreq/acpi-cpufreq.c | 2 +-
drivers/cpufreq/powernow-k8.c | 13 +++----------
8 files changed, 26 insertions(+), 46 deletions(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 266eaee..8bcb7ac 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -115,6 +115,11 @@ struct cpuinfo_x86 {
u16 llc_id;
/* representing HT siblings of each logical CPU */
cpumask_t sibling_map;
+ /*
+ * representing all execution threads on a logical CPU, i.e. per
+ * physical socket
+ */
+ cpumask_t core_map;
} __attribute__((__aligned__(SMP_CACHE_BYTES)));
#define X86_VENDOR_INTEL 0
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index b5e7cd2..75aea4d 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -31,14 +31,8 @@ static inline bool cpu_has_ht_siblings(void)
return has_siblings;
}
-DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
DECLARE_PER_CPU(int, cpu_number);
-static inline struct cpumask *cpu_core_mask(int cpu)
-{
- return per_cpu(cpu_core_map, cpu);
-}
-
DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 5297acbf..58438a1b 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -160,7 +160,7 @@ extern const struct cpumask *cpu_coregroup_mask(int cpu);
#ifdef ENABLE_TOPO_DEFINES
#define topology_physical_package_id(cpu) (cpu_data(cpu).phys_proc_id)
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
-#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
+#define topology_core_cpumask(cpu) (&cpu_data(cpu).core_map)
#define topology_thread_cpumask(cpu) (&cpu_data(cpu).sibling_map)
/* indicates that pointers to the topology cpumask_t maps are valid */
@@ -176,7 +176,7 @@ void x86_pci_root_bus_resources(int bus, struct list_head *resources);
#ifdef CONFIG_SMP
#define mc_capable() ((boot_cpu_data.x86_max_cores > 1) && \
- (cpumask_weight(cpu_core_mask(0)) != nr_cpu_ids))
+ (cpumask_weight(&boot_cpu_data.core_map) != nr_cpu_ids))
#define smt_capable() (smp_num_siblings > 1)
#endif
diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index 8022c66..e6e07c2 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -13,8 +13,7 @@ static void show_cpuinfo_core(struct seq_file *m, struct cpuinfo_x86 *c,
#ifdef CONFIG_SMP
if (c->x86_max_cores * smp_num_siblings > 1) {
seq_printf(m, "physical id\t: %d\n", c->phys_proc_id);
- seq_printf(m, "siblings\t: %d\n",
- cpumask_weight(cpu_core_mask(cpu)));
+ seq_printf(m, "siblings\t: %d\n", cpumask_weight(&c->core_map));
seq_printf(m, "core id\t\t: %d\n", c->cpu_core_id);
seq_printf(m, "cpu cores\t: %d\n", c->booted_cores);
seq_printf(m, "apicid\t\t: %d\n", c->apicid);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 991d17b..de23378 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -116,10 +116,6 @@ static struct task_struct *idle_thread_array[NR_CPUS] __cpuinitdata ;
int smp_num_siblings = 1;
EXPORT_SYMBOL(smp_num_siblings);
-/* representing HT and core siblings of each logical CPU */
-DEFINE_PER_CPU(cpumask_var_t, cpu_core_map);
-EXPORT_PER_CPU_SYMBOL(cpu_core_map);
-
/* Per CPU bogomips and other parameters */
DEFINE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);
@@ -326,8 +322,8 @@ static void __cpuinit link_thread_siblings(int cpu1, int cpu2)
{
cpumask_set_cpu(cpu1, &cpu_data(cpu2).sibling_map);
cpumask_set_cpu(cpu2, &cpu_data(cpu1).sibling_map);
- cpumask_set_cpu(cpu1, cpu_core_mask(cpu2));
- cpumask_set_cpu(cpu2, cpu_core_mask(cpu1));
+ cpumask_set_cpu(cpu1, &cpu_data(cpu2).core_map);
+ cpumask_set_cpu(cpu2, &cpu_data(cpu1).core_map);
cpumask_set_cpu(cpu1, &cpu_data(cpu2).llc_shared_map);
cpumask_set_cpu(cpu2, &cpu_data(cpu1).llc_shared_map);
}
@@ -361,7 +357,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, &c->llc_shared_map);
if (__this_cpu_read(cpu_info.x86_max_cores) == 1) {
- cpumask_copy(cpu_core_mask(cpu), &c->sibling_map);
+ cpumask_copy(&c->core_map, &c->sibling_map);
c->booted_cores = 1;
return;
}
@@ -374,8 +370,8 @@ void __cpuinit set_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, &o->llc_shared_map);
}
if (c->phys_proc_id == o->phys_proc_id) {
- cpumask_set_cpu(i, cpu_core_mask(cpu));
- cpumask_set_cpu(cpu, cpu_core_mask(i));
+ cpumask_set_cpu(i, &c->core_map);
+ cpumask_set_cpu(cpu, &o->core_map);
/*
* Does this new cpu bringup a new core?
*/
@@ -404,11 +400,11 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
struct cpuinfo_x86 *c = &cpu_data(cpu);
/*
* For perf, we return last level cache shared map.
- * And for power savings, we return cpu_core_map
+ * And for power savings, we return core map.
*/
if ((sched_mc_power_savings || sched_smt_power_savings) &&
!(cpu_has(c, X86_FEATURE_AMD_DCM)))
- return cpu_core_mask(cpu);
+ return &c->core_map;
else
return &c->llc_shared_map;
}
@@ -907,7 +903,7 @@ static __init void disable_smp(void)
else
physid_set_mask_of_physid(0, &phys_cpu_present_map);
cpumask_set_cpu(0, &cpu_data(0).sibling_map);
- cpumask_set_cpu(0, cpu_core_mask(0));
+ cpumask_set_cpu(0, &cpu_data(0).core_map);
}
/*
@@ -1030,8 +1026,6 @@ static void __init smp_cpu_index_default(void)
*/
void __init native_smp_prepare_cpus(unsigned int max_cpus)
{
- unsigned int i;
-
preempt_disable();
smp_cpu_index_default();
@@ -1043,9 +1037,6 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
mb();
current_thread_info()->cpu = 0; /* needed? */
- for_each_possible_cpu(i) {
- zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
- }
set_cpu_sibling_map(0);
@@ -1233,19 +1224,21 @@ static void remove_siblinginfo(int cpu)
int sibling;
struct cpuinfo_x86 *c = &cpu_data(cpu);
- for_each_cpu(sibling, cpu_core_mask(cpu)) {
- cpumask_clear_cpu(cpu, cpu_core_mask(sibling));
+ for_each_cpu(sibling, &c->core_map) {
+ struct cpuinfo_x86 *o = &cpu_data(sibling);
+
+ cpumask_clear_cpu(cpu, &o->core_map);
/*/
* last thread sibling in this cpu core going down
*/
if (cpumask_weight(&c->sibling_map) == 1)
- cpu_data(sibling).booted_cores--;
+ o->booted_cores--;
}
for_each_cpu(sibling, &c->sibling_map)
cpumask_clear_cpu(cpu, &c->sibling_map);
cpumask_clear(&c->sibling_map);
- cpumask_clear(cpu_core_mask(cpu));
+ cpumask_clear(&c->core_map);
c->phys_proc_id = 0;
c->cpu_core_id = 0;
cpumask_clear_cpu(cpu, cpu_sibling_setup_mask);
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 00f32c0..d1792ec 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -206,7 +206,6 @@ static void __init xen_smp_prepare_boot_cpu(void)
static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
{
unsigned cpu;
- unsigned int i;
if (skip_ioapic_setup) {
char *m = (max_cpus == 0) ?
@@ -222,9 +221,6 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
smp_store_cpu_info(0);
cpu_data(0).x86_max_cores = 1;
- for_each_possible_cpu(i) {
- zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
- }
set_cpu_sibling_map(0);
if (xen_smp_intr_init(0))
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 56c6c6b..152af7f 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -557,7 +557,7 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
dmi_check_system(sw_any_bug_dmi_table);
if (bios_with_sw_any_bug && cpumask_weight(policy->cpus) == 1) {
policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
- cpumask_copy(policy->cpus, cpu_core_mask(cpu));
+ cpumask_copy(policy->cpus, &c->core_map);
}
#endif
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 8f9b2ce..da0767c 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -66,13 +66,6 @@ static struct msr __percpu *msrs;
static struct cpufreq_driver cpufreq_amd64_driver;
-#ifndef CONFIG_SMP
-static inline const struct cpumask *cpu_core_mask(int cpu)
-{
- return cpumask_of(0);
-}
-#endif
-
/* Return a frequency in MHz, given an input fid */
static u32 find_freq_from_fid(u32 fid)
{
@@ -715,7 +708,7 @@ static int fill_powernow_table(struct powernow_k8_data *data,
pr_debug("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
data->powernow_table = powernow_table;
- if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
+ if (cpumask_first(&cpu_data(data->cpu).core_map) == data->cpu)
print_basics(data);
for (j = 0; j < data->numps; j++)
@@ -884,7 +877,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
powernow_table[data->acpi_data.state_count].index = 0;
data->powernow_table = powernow_table;
- if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)
+ if (cpumask_first(&cpu_data(data->cpu).core_map) == data->cpu)
print_basics(data);
/* notify BIOS that we exist */
@@ -1326,7 +1319,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
if (cpu_family == CPU_HW_PSTATE)
cpumask_copy(pol->cpus, cpumask_of(pol->cpu));
else
- cpumask_copy(pol->cpus, cpu_core_mask(pol->cpu));
+ cpumask_copy(pol->cpus, &c->core_map);
data->available_cores = pol->cpus;
if (cpu_family == CPU_HW_PSTATE)
--
1.7.9
--
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