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From: Len Brown <lenb@kernel.org>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, Len Brown <len.brown@intel.com>,
	linux-doc@vger.kernel.org
Subject: [PATCH 05/11] x86 topology: export die_siblings
Date: Mon, 18 Feb 2019 22:40:07 -0500	[thread overview]
Message-ID: <0d54a56186fb9be7a8f622a4625a41dc600dd7a4.1550545163.git.len.brown@intel.com> (raw)
In-Reply-To: <635b2bf8b1151a191cd9299276b75791a818c0c2.1550545163.git.len.brown@intel.com>

From: Len Brown <len.brown@intel.com>

like core_siblings, except it shows which die are in the same package.

This is needed for lscpu(1) to correctly display die topology.

Signed-off-by: Len Brown <len.brown@intel.com>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Len Brown <len.brown@intel.com>
---
 Documentation/cputopology.txt   | 10 ++++++++++
 arch/x86/include/asm/smp.h      |  1 +
 arch/x86/include/asm/topology.h |  1 +
 arch/x86/kernel/smpboot.c       | 20 ++++++++++++++++++++
 arch/x86/xen/smp_pv.c           |  1 +
 drivers/base/topology.c         |  6 ++++++
 include/linux/topology.h        |  3 +++
 7 files changed, 42 insertions(+)

diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt
index 287213b4517b..7dd2ae3df233 100644
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -56,6 +56,16 @@ core_siblings_list:
 	human-readable list of cpuX's hardware threads within the same
 	die_id.
 
+die_siblings:
+
+	internal kernel map of cpuX's hardware threads within the same
+	physical_package_id.
+
+die_siblings_list:
+
+	human-readable list of cpuX's hardware threads within the same
+	physical_package_id.
+
 book_siblings:
 
 	internal kernel map of cpuX's hardware threads within the same
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index 2e95b6c1bca3..39266d193597 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -23,6 +23,7 @@ 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);
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 281be6bbc80d..a52a572147ba 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -110,6 +110,7 @@ extern const struct cpumask *cpu_coregroup_mask(int cpu);
 #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))
 
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 4250a87f57db..42d37e4a1918 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -90,6 +90,10 @@ 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 and 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 */
@@ -461,6 +465,12 @@ static bool match_llc(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
  * multicore group inside a NUMA node.  If this happens, we will
  * discard the MC level of the topology later.
  */
+static bool match_pkg(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
+{
+	if (c->phys_proc_id == o->phys_proc_id)
+		return true;
+	return false;
+}
 static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
 {
 	if (c->cpu_die_id == o->cpu_die_id)
@@ -530,6 +540,7 @@ 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;
 	}
@@ -576,8 +587,12 @@ void set_cpu_sibling_map(int cpu)
 			} else if (i != cpu && !c->booted_cores)
 				c->booted_cores = cpu_data(i).booted_cores;
 		}
+
 		if (match_die(c, o) && !topology_same_node(c, o))
 			x86_has_numa_in_package = true;
+
+		if ((i == cpu) || (has_mp && match_pkg(c, o)))
+			link_mask(topology_die_cpumask, cpu, i);
 	}
 
 	threads = cpumask_weight(topology_sibling_cpumask(cpu));
@@ -1173,6 +1188,7 @@ 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));
 }
 
 /*
@@ -1268,6 +1284,7 @@ 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(&per_cpu(cpu_die_map, i), GFP_KERNEL);
 		zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
 	}
 
@@ -1488,6 +1505,8 @@ 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))
@@ -1495,6 +1514,7 @@ 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);
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index 145506f9fdbe..ac13b0be8448 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -251,6 +251,7 @@ static void __init xen_pv_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(&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);
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 50352cf96f85..5b1317ae3262 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -57,6 +57,10 @@ 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_siblings, die_cpumask);
+static DEVICE_ATTR_RO(die_siblings);
+static DEVICE_ATTR_RO(die_siblings_list);
+
 #ifdef CONFIG_SCHED_BOOK
 define_id_show_func(book_id);
 static DEVICE_ATTR_RO(book_id);
@@ -81,6 +85,8 @@ static struct attribute *default_attrs[] = {
 	&dev_attr_thread_siblings_list.attr,
 	&dev_attr_core_siblings.attr,
 	&dev_attr_core_siblings_list.attr,
+	&dev_attr_die_siblings.attr,
+	&dev_attr_die_siblings_list.attr,
 #ifdef CONFIG_SCHED_BOOK
 	&dev_attr_book_id.attr,
 	&dev_attr_book_siblings.attr,
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 5cc8595dd0e4..47a3e3c08036 100644
--- 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)
-- 
2.18.0-rc0


  parent reply	other threads:[~2019-02-19  3:40 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-19  3:40 [PATCH 0/11] multi-die/package support Len Brown
2019-02-19  3:40 ` [PATCH 01/11] x86 topology: fix doc typo Len Brown
2019-02-19  3:40   ` [PATCH 02/11] topolgy: simplify cputopology.txt formatting and wording Len Brown
     [not found]     ` <9108bd98-e9f4-fee3-80c7-72d540c48291@infradead.org>
2019-02-19 20:33       ` [linux-drivers-review] " Brown, Len
2019-02-19  3:40   ` [PATCH 03/11] x86 topology: Add CPUID.1F multi-die/package support Len Brown
2019-02-19 16:49     ` Liang, Kan
2019-02-19 19:27       ` Brown, Len
2019-02-20  2:59     ` Like Xu
2019-02-20  6:10       ` Len Brown
2019-02-20 10:55     ` Peter Zijlstra
2019-02-20 15:08       ` Len Brown
2019-02-26 13:54         ` Peter Zijlstra
2019-02-28 15:59           ` Len Brown
2019-02-28 17:56             ` Peter Zijlstra
2019-02-24 10:04     ` Brice Goglin
2019-02-25  5:31       ` Like Xu
2019-02-25  8:08       ` Brown, Len
2019-02-19  3:40   ` [PATCH 04/11] cpu topology: export die_id Len Brown
2019-02-19  3:40   ` Len Brown [this message]
2019-02-19 16:56     ` [PATCH 05/11] x86 topology: export die_siblings Liang, Kan
2019-02-19 18:43       ` Brown, Len
2019-02-19 19:33         ` Liang, Kan
2019-02-20 10:58           ` Peter Zijlstra
2019-02-20 21:52     ` Brice Goglin
2019-02-21  7:41       ` Len Brown
2019-02-21  8:38         ` Brice Goglin
2019-02-19  3:40   ` [PATCH 06/11] x86 topology: define topology_unique_die_id() Len Brown
2019-02-19  3:40   ` [PATCH 07/11] powercap/intel_rapl: simplify rapl_find_package() Len Brown
2019-02-19  9:11     ` Rafael J. Wysocki
2019-02-19  3:40   ` [PATCH 08/11] powercap/intel_rapl: Support multi-die/package Len Brown
2019-02-19  9:10     ` Rafael J. Wysocki
2019-02-20 11:02     ` Peter Zijlstra
2019-02-21  5:44       ` Len Brown
2019-02-26  4:41         ` Len Brown
2019-02-26  6:55           ` Zhang Rui
2019-02-19  3:40   ` [PATCH 09/11] powercap/intel_rapl: update rapl domain name and debug messages Len Brown
2019-02-19  9:10     ` Rafael J. Wysocki
2019-02-19  3:40   ` [PATCH 10/11] thermal/x86_pkg_temp_thermal: Support multi-die/package Len Brown
2019-02-19  3:40   ` [PATCH 11/11] hwmon/coretemp: " Len Brown
2019-02-19 16:46     ` Guenter Roeck

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