From: Len Brown <len.brown@intel.com>
Date: Mon, 13 May 2019 13:58:56 -0400
Subject: topology: Create core_cpus and die_cpus sysfs attributes
Git-commit: 2e4c54dac7b360c3820399bdf06cde9134a4495b
Patch-mainline: v5.3-rc1
References: jsc#SLE-5454
Create CPU topology sysfs attributes: "core_cpus" and "core_cpus_list"
These attributes represent all of the logical CPUs that share the
same core.
These attriutes is synonymous with the existing "thread_siblings" and
"thread_siblings_list" attribute, which will be deprecated.
Create CPU topology sysfs attributes: "die_cpus" and "die_cpus_list".
These attributes represent all of the logical CPUs that share the
same die.
Suggested-by: Brice Goglin <Brice.Goglin@inria.fr>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/071c23a298cd27ede6ed0b6460cae190d193364f.1557769318.git.len.brown@intel.com
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
Documentation/cputopology.txt | 21 +++++++++++++++------
arch/x86/include/asm/smp.h | 1 +
arch/x86/include/asm/topology.h | 1 +
arch/x86/kernel/smpboot.c | 22 ++++++++++++++++++++++
arch/x86/xen/smp_pv.c | 1 +
drivers/base/topology.c | 12 ++++++++++++
include/linux/topology.h | 3 +++
7 files changed, 55 insertions(+), 6 deletions(-)
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -32,15 +32,15 @@ die_id:
identifier (rather than the kernel's). The actual value is
architecture and platform dependent.
-5) /sys/devices/system/cpu/cpuX/topology/thread_siblings:
+core_cpus:
- internal kernel map of cpuX's hardware threads within the same
- core as cpuX.
+ internal kernel map of CPUs within the same core.
+ (deprecated name: "thread_siblings")
-6) /sys/devices/system/cpu/cpuX/topology/thread_siblings_list:
+core_cpus_list:
- human-readable list of cpuX's hardware threads within the same
- core as cpuX.
+ human-readable list of CPUs within the same core.
+ (deprecated name: "thread_siblings_list");
package_cpus:
@@ -52,6 +52,14 @@ package_cpus_list:
human-readable list of CPUs sharing the same physical_package_id.
(deprecated name: "core_siblings_list")
+die_cpus:
+
+ internal kernel map of CPUs within the same die.
+
+die_cpus_list:
+
+ human-readable list of CPUs within the same die.
+
9) /sys/devices/system/cpu/cpuX/topology/book_siblings:
internal kernel map of cpuX's hardware threads within the same
@@ -89,6 +97,7 @@ these macros in include/asm-XXX/topology
#define topology_drawer_id(cpu)
#define topology_sibling_cpumask(cpu)
#define topology_core_cpumask(cpu)
+#define topology_die_cpumask(cpu)
#define topology_book_cpumask(cpu)
#define topology_drawer_cpumask(cpu)
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -22,6 +22,7 @@ extern unsigned int num_processors;
DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
+DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
/* cpus sharing the last level cache: */
DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -117,6 +117,7 @@ extern const struct cpumask *cpu_coregro
#define topology_core_id(cpu) (cpu_data(cpu).cpu_core_id)
#ifdef CONFIG_SMP
+#define topology_die_cpumask(cpu) (per_cpu(cpu_die_map, cpu))
#define topology_core_cpumask(cpu) (per_cpu(cpu_core_map, cpu))
#define topology_sibling_cpumask(cpu) (per_cpu(cpu_sibling_map, cpu))
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -89,6 +89,10 @@ EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
EXPORT_PER_CPU_SYMBOL(cpu_core_map);
+/* representing HT, core, and die siblings of each logical CPU */
+DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
+EXPORT_PER_CPU_SYMBOL(cpu_die_map);
+
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
/* Per CPU bogomips and other parameters */
@@ -512,6 +516,15 @@ static bool match_pkg(struct cpuinfo_x86
return false;
}
+static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
+{
+ if ((c->phys_proc_id == o->phys_proc_id) &&
+ (c->cpu_die_id == o->cpu_die_id))
+ return true;
+ return false;
+}
+
+
#if defined(CONFIG_SCHED_SMT) || defined(CONFIG_SCHED_MC)
static inline int x86_sched_itmt_flags(void)
{
@@ -574,6 +587,7 @@ void set_cpu_sibling_map(int cpu)
cpumask_set_cpu(cpu, topology_sibling_cpumask(cpu));
cpumask_set_cpu(cpu, cpu_llc_shared_mask(cpu));
cpumask_set_cpu(cpu, topology_core_cpumask(cpu));
+ cpumask_set_cpu(cpu, topology_die_cpumask(cpu));
c->booted_cores = 1;
return;
}
@@ -622,6 +636,9 @@ void set_cpu_sibling_map(int cpu)
}
if (match_pkg(c, o) && !topology_same_node(c, o))
x86_has_numa_in_package = true;
+
+ if ((i == cpu) || (has_mp && match_die(c, o)))
+ link_mask(topology_die_cpumask, cpu, i);
}
threads = cpumask_weight(topology_sibling_cpumask(cpu));
@@ -1213,6 +1230,7 @@ static __init void disable_smp(void)
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));
}
enum {
@@ -1339,6 +1357,7 @@ void __init native_smp_prepare_cpus(unsi
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(&per_cpu(cpu_die_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
@@ -1562,6 +1581,8 @@ static void remove_siblinginfo(int cpu)
cpu_data(sibling).booted_cores--;
}
+ for_each_cpu(sibling, topology_die_cpumask(cpu))
+ cpumask_clear_cpu(cpu, topology_die_cpumask(sibling));
for_each_cpu(sibling, topology_sibling_cpumask(cpu))
cpumask_clear_cpu(cpu, topology_sibling_cpumask(sibling));
for_each_cpu(sibling, cpu_llc_shared_mask(cpu))
@@ -1569,6 +1590,7 @@ static void remove_siblinginfo(int cpu)
cpumask_clear(cpu_llc_shared_mask(cpu));
cpumask_clear(topology_sibling_cpumask(cpu));
cpumask_clear(topology_core_cpumask(cpu));
+ cpumask_clear(topology_die_cpumask(cpu));
c->cpu_core_id = 0;
c->booted_cores = 0;
cpumask_clear_cpu(cpu, cpu_sibling_setup_mask);
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -248,6 +248,7 @@ static void __init xen_pv_smp_prepare_cp
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(&per_cpu(cpu_die_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
set_cpu_sibling_map(0);
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -68,10 +68,18 @@ define_siblings_show_func(thread_sibling
static DEVICE_ATTR_RO(thread_siblings);
static DEVICE_ATTR_RO(thread_siblings_list);
+define_siblings_show_func(core_cpus, sibling_cpumask);
+static DEVICE_ATTR_RO(core_cpus);
+static DEVICE_ATTR_RO(core_cpus_list);
+
define_siblings_show_func(core_siblings, core_cpumask);
static DEVICE_ATTR_RO(core_siblings);
static DEVICE_ATTR_RO(core_siblings_list);
+define_siblings_show_func(die_cpus, die_cpumask);
+static DEVICE_ATTR_RO(die_cpus);
+static DEVICE_ATTR_RO(die_cpus_list);
+
define_siblings_show_func(package_cpus, core_cpumask);
static DEVICE_ATTR_RO(package_cpus);
static DEVICE_ATTR_RO(package_cpus_list);
@@ -98,8 +106,12 @@ static struct attribute *default_attrs[]
&dev_attr_core_id.attr,
&dev_attr_thread_siblings.attr,
&dev_attr_thread_siblings_list.attr,
+ &dev_attr_core_cpus.attr,
+ &dev_attr_core_cpus_list.attr,
&dev_attr_core_siblings.attr,
&dev_attr_core_siblings_list.attr,
+ &dev_attr_die_cpus.attr,
+ &dev_attr_die_cpus_list.attr,
&dev_attr_package_cpus.attr,
&dev_attr_package_cpus_list.attr,
#ifdef CONFIG_SCHED_BOOK
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -196,6 +196,9 @@ static inline int cpu_to_mem(int cpu)
#ifndef topology_core_cpumask
#define topology_core_cpumask(cpu) cpumask_of(cpu)
#endif
+#ifndef topology_die_cpumask
+#define topology_die_cpumask(cpu) cpumask_of(cpu)
+#endif
#ifdef CONFIG_SCHED_SMT
static inline const struct cpumask *cpu_smt_mask(int cpu)