From: Kieran Bingham <kieran.bing...@linaro.org>
The linux kernel provides macro's for iterating against values from the
cpu_list masks. By providing some commonly used masks, we can mirror the
kernels helper macros with easy to use generators.
Signed-off-by: Kieran Bingham <kieran.bing...@linaro.org>
Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
scripts/gdb/linux/cpus.py | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index 4297b83..fc316fb 100644
--- a/scripts/gdb/linux/cpus.py
+++ b/scripts/gdb/linux/cpus.py
@@ -100,6 +100,44 @@ def cpu_list(mask_name):
yield cpu
+def each_online_cpu():
+ for cpu in cpu_list("__cpu_online_mask"):
+ yield cpu
+
+
+def each_present_cpu():
+ for cpu in cpu_list("__cpu_present_mask"):
+ yield cpu
+
+
+def each_possible_cpu():
+ for cpu in cpu_list("__cpu_possible_mask"):
+ yield cpu
+
+
+def each_active_cpu():
+ for cpu in cpu_list("__cpu_active_mask"):
+ yield cpu
+
+
+class LxCpus(gdb.Command):
+ """List CPU status arrays
+
+Displays the known state of each CPU based on the kernel masks
+and can help identify the state of hotplugged CPUs"""
+
+ def __init__(self):
+ super(LxCpus, self).__init__("lx-cpus", gdb.COMMAND_DATA)
+
+ def invoke(self, arg, from_tty):
+ gdb.write("Possible CPUs : {}\n".format(list(each_possible_cpu())))
+ gdb.write("Present CPUs : {}\n".format(list(each_present_cpu())))
+ gdb.write("Online CPUs : {}\n".format(list(each_online_cpu())))
+ gdb.write("Active CPUs : {}\n".format(list(each_active_cpu())))
+
+LxCpus()
+
+
class PerCpu(gdb.Function):
"""Return per-cpu variable.
--
2.1.4
