linux-kernel - [PATCH 13/14] topology: Create core

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Message-Id: <8c68d2dfd5d516316444b1a25fe550bb42733eb8.1551160674.git.len.brown@intel.com>
Date:   Tue, 26 Feb 2019 01:20:11 -0500
From:   Len Brown <lenb@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org, Len Brown <len.brown@...el.com>
Subject: [PATCH 13/14] topology: Create core_threads sysfs attribute

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

Create CPU topology sysfs attributes:
"core_threads" and "core_threads_list"

These attributes represent all of the logical CPU threads that share the
same core.

These attriutes is synonymous with the existing "thread_siblings" and
"thread_siblings_list" attribute, which will be deprecated.

Signed-off-by: Len Brown <len.brown@...el.com>
Suggested-by: Brice Goglin <Brice.Goglin@...ia.fr>
---
 Documentation/cputopology.txt | 8 ++++----
 drivers/base/topology.c       | 6 ++++++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/Documentation/cputopology.txt b/Documentation/cputopology.txt
index 2794dbe8e559..e67915a8a512 100644
--- a/Documentation/cputopology.txt
+++ b/Documentation/cputopology.txt
@@ -36,15 +36,15 @@ drawer_id:
 	identifier (rather than the kernel's).	The actual value is
 	architecture and platform dependent.
 
-thread_siblings:
+core_threads:
 
 	internal kernel map of cpuX's hardware threads within the same
-	core as cpuX.
+	core as cpuX. (deprecated name: "thread_siblings")
 
-thread_siblings_list:
+core_threads_list:
 
 	human-readable list of cpuX's hardware threads within the same
-	core as cpuX.
+	core as cpuX. (deprecated name: "thread_siblings_list");
 
 package_threads:
 
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index 5f4405a08c6e..73efadf5e6d4 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -53,6 +53,10 @@ define_siblings_show_func(thread_siblings, sibling_cpumask);
 static DEVICE_ATTR_RO(thread_siblings);
 static DEVICE_ATTR_RO(thread_siblings_list);
 
+define_siblings_show_func(core_threads, sibling_cpumask);
+static DEVICE_ATTR_RO(core_threads);
+static DEVICE_ATTR_RO(core_threads_list);
+
 define_siblings_show_func(core_siblings, core_cpumask);
 static DEVICE_ATTR_RO(core_siblings);
 static DEVICE_ATTR_RO(core_siblings_list);
@@ -83,6 +87,8 @@ static struct attribute *default_attrs[] = {
 	&dev_attr_core_id.attr,
 	&dev_attr_thread_siblings.attr,
 	&dev_attr_thread_siblings_list.attr,
+	&dev_attr_core_threads.attr,
+	&dev_attr_core_threads_list.attr,
 	&dev_attr_core_siblings.attr,
 	&dev_attr_core_siblings_list.attr,
 	&dev_attr_package_threads.attr,
-- 
2.18.0-rc0