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authorKieran Bingham <kieran.bingham@linaro.org>2016-05-23 16:25:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-23 17:04:14 -0700
commitb1503934a5e51e74b2f4c72ad77b33231e7b6953 (patch)
tree2a7051cec78c1b468eb8d2feabd5c2bf6921abee
parentc1a153992ea86307d2b8c3c0be2e060102b02aff (diff)
downloadlinux-b1503934a5e51e74b2f4c72ad77b33231e7b6953.tar.bz2
scripts/gdb: add cpu iterators
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. Link: http://lkml.kernel.org/r/d045c6599771ada1999d49612ee30fd2f9acf17f.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--scripts/gdb/linux/cpus.py38
1 files changed, 38 insertions, 0 deletions
diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
index 4297b83fedef..fc316fb3a3d4 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.