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x86: Move llc_shared_map out of cpu_info

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cpu_info is already with per_cpu, We can take llc_shared_map out
of cpu_info, and declare it as per_cpu variable directly.

So later referencing could be simple and directly instead of
diving to find cpu_info at first.

Also could make smp_store_cpu_info() much simple to avoid to do
save and restore trick.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: Alok N Kataria <akataria@vmware.com>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Hans J. Koch <hjk@linutronix.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4D3A16E8.5020608@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
2011-01-21 15:29:44 -08:00
committed by Ingo Molnar
parent 6663050edd
commit b3d7336db5
5 changed files with 21 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
arch/x86/kernel/smpboot.c
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@@ -130,6 +130,8 @@ EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
DEFINE_PER_CPU(cpumask_var_t, cpu_core_map);
EXPORT_PER_CPU_SYMBOL(cpu_core_map);
DEFINE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
/* Per CPU bogomips and other parameters */
DEFINE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);
@@ -355,23 +357,6 @@ notrace static void __cpuinit start_secondary(void *unused)
cpu_idle();
}
#ifdef CONFIG_CPUMASK_OFFSTACK
/* In this case, llc_shared_map is a pointer to a cpumask. */
static inline void copy_cpuinfo_x86(struct cpuinfo_x86 *dst,
const struct cpuinfo_x86 *src)
{
struct cpumask *llc = dst->llc_shared_map;
*dst = *src;
dst->llc_shared_map = llc;
}
#else
static inline void copy_cpuinfo_x86(struct cpuinfo_x86 *dst,
const struct cpuinfo_x86 *src)
{
*dst = *src;
}
#endif /* CONFIG_CPUMASK_OFFSTACK */
/*
* The bootstrap kernel entry code has set these up. Save them for
* a given CPU
@@ -381,7 +366,7 @@ void __cpuinit smp_store_cpu_info(int id)
{
struct cpuinfo_x86 *c = &cpu_data(id);
copy_cpuinfo_x86(c, &boot_cpu_data);
*c = boot_cpu_data;
c->cpu_index = id;
if (id != 0)
identify_secondary_cpu(c);
@@ -389,15 +374,12 @@ void __cpuinit smp_store_cpu_info(int id)
static void __cpuinit link_thread_siblings(int cpu1, int cpu2)
{
struct cpuinfo_x86 *c1 = &cpu_data(cpu1);
struct cpuinfo_x86 *c2 = &cpu_data(cpu2);
cpumask_set_cpu(cpu1, cpu_sibling_mask(cpu2));
cpumask_set_cpu(cpu2, cpu_sibling_mask(cpu1));
cpumask_set_cpu(cpu1, cpu_core_mask(cpu2));
cpumask_set_cpu(cpu2, cpu_core_mask(cpu1));
cpumask_set_cpu(cpu1, c2->llc_shared_map);
cpumask_set_cpu(cpu2, c1->llc_shared_map);
cpumask_set_cpu(cpu1, cpu_llc_shared_mask(cpu2));
cpumask_set_cpu(cpu2, cpu_llc_shared_mask(cpu1));
}
@@ -425,7 +407,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, cpu_sibling_mask(cpu));
}
cpumask_set_cpu(cpu, c->llc_shared_map);
cpumask_set_cpu(cpu, cpu_llc_shared_mask(cpu));
if (__this_cpu_read(cpu_info.x86_max_cores) == 1) {
cpumask_copy(cpu_core_mask(cpu), cpu_sibling_mask(cpu));
@@ -436,8 +418,8 @@ void __cpuinit set_cpu_sibling_map(int cpu)
for_each_cpu(i, cpu_sibling_setup_mask) {
if (per_cpu(cpu_llc_id, cpu) != BAD_APICID &&
per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) {
cpumask_set_cpu(i, c->llc_shared_map);
cpumask_set_cpu(cpu, cpu_data(i).llc_shared_map);
cpumask_set_cpu(i, cpu_llc_shared_mask(cpu));
cpumask_set_cpu(cpu, cpu_llc_shared_mask(i));
}
if (c->phys_proc_id == cpu_data(i).phys_proc_id) {
cpumask_set_cpu(i, cpu_core_mask(cpu));
@@ -476,7 +458,7 @@ const struct cpumask *cpu_coregroup_mask(int cpu)
!(cpu_has(c, X86_FEATURE_AMD_DCM)))
return cpu_core_mask(cpu);
else
return c->llc_shared_map;
return cpu_llc_shared_mask(cpu);
}
static void impress_friends(void)
@@ -1103,7 +1085,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
for_each_possible_cpu(i) {
zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
zalloc_cpumask_var(&cpu_data(i).llc_shared_map, GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
set_cpu_sibling_map(0);