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Message-Id: <1335742410-11569-5-git-send-email-kjwinchester@gmail.com>
Date: Sun, 29 Apr 2012 20:33:29 -0300
From: Kevin Winchester <kjwinchester@...il.com>
To: hpa@...or.com, Ingo Molnar <mingo@...e.hu>
Cc: Kevin Winchester <kjwinchester@...il.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 v6 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 | 3 +--
arch/x86/include/asm/topology.h | 2 +-
arch/x86/kernel/smpboot.c | 11 +----------
arch/x86/xen/smp.c | 4 ----
drivers/cpufreq/powernow-k8.c | 7 -------
6 files changed, 8 insertions(+), 24 deletions(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 1bdb520..7762fc7 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -124,6 +124,11 @@ 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 ef01857..408152e 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -31,7 +31,6 @@ 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_sibling_mask(int cpu)
@@ -41,7 +40,7 @@ static inline struct cpumask *cpu_sibling_mask(int cpu)
static inline struct cpumask *cpu_core_mask(int cpu)
{
- return per_cpu(cpu_core_map, cpu);
+ return &cpu_data(cpu).core_map;
}
static inline struct cpumask *cpu_llc_shared_mask(int cpu)
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 5297acbf..5ffa396 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 */
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 9d06598..60729f4 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -117,10 +117,6 @@ 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);
@@ -388,7 +384,7 @@ 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)))
@@ -1012,8 +1008,6 @@ 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();
@@ -1025,9 +1019,6 @@ 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);
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 21eb6ed..fbbc6ab 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -227,7 +227,6 @@ 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) ?
@@ -243,9 +242,6 @@ 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/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index c0e8164..f81fdb5 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -67,13 +67,6 @@ 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)
{
--
1.7.10
--
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