summaryrefslogtreecommitdiff
path: root/arch/mips/kernel/proc.c
diff options
context:
space:
mode:
authorRalf Baechle <ralf@linux-mips.org>2013-10-16 17:10:07 +0200
committerRalf Baechle <ralf@linux-mips.org>2014-03-31 18:17:12 +0200
commitd6d3c9afaab47418ab2d7f874fb8aeac1f067104 (patch)
tree9f3b27fad7b722ab15144e6a044c5d771d3e3d59 /arch/mips/kernel/proc.c
parenta2bec0784465d3e30eadc20b49c779fa77d42dad (diff)
MIPS: MT: proc: Add support for printing VPE and TC ids
And there are more CPUs or configurations that want to provide special per-CPU information in /proc/cpuinfo. So I think there needs to be a hook mechanism, such as a notifier. This is a first cut only; I need to think about what sort of looking the notifier needs to have. But I'd appreciate testing on MT hardware! Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6066/
Diffstat (limited to 'arch/mips/kernel/proc.c')
-rw-r--r--arch/mips/kernel/proc.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/mips/kernel/proc.c b/arch/mips/kernel/proc.c
index f0df7fde37c5..e40971b51d2f 100644
--- a/arch/mips/kernel/proc.c
+++ b/arch/mips/kernel/proc.c
@@ -17,8 +17,24 @@
unsigned int vced_count, vcei_count;
+/*
+ * * No lock; only written during early bootup by CPU 0.
+ * */
+static RAW_NOTIFIER_HEAD(proc_cpuinfo_chain);
+
+int __ref register_proc_cpuinfo_notifier(struct notifier_block *nb)
+{
+ return raw_notifier_chain_register(&proc_cpuinfo_chain, nb);
+}
+
+int proc_cpuinfo_notifier_call_chain(unsigned long val, void *v)
+{
+ return raw_notifier_call_chain(&proc_cpuinfo_chain, val, v);
+}
+
static int show_cpuinfo(struct seq_file *m, void *v)
{
+ struct proc_cpuinfo_notifier_args proc_cpuinfo_notifier_args;
unsigned long n = (unsigned long) v - 1;
unsigned int version = cpu_data[n].processor_id;
unsigned int fp_vers = cpu_data[n].fpu_id;
@@ -120,6 +136,13 @@ static int show_cpuinfo(struct seq_file *m, void *v)
cpu_has_vce ? "%u" : "not available");
seq_printf(m, fmt, 'D', vced_count);
seq_printf(m, fmt, 'I', vcei_count);
+
+ proc_cpuinfo_notifier_args.m = m;
+ proc_cpuinfo_notifier_args.n = n;
+
+ raw_notifier_call_chain(&proc_cpuinfo_chain, 0,
+ &proc_cpuinfo_notifier_args);
+
seq_printf(m, "\n");
return 0;