diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2013-10-16 17:10:07 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-31 18:17:12 +0200 |
| commit | d6d3c9afaab47418ab2d7f874fb8aeac1f067104 (patch) | |
| tree | 9f3b27fad7b722ab15144e6a044c5d771d3e3d59 /arch/mips/kernel/proc.c | |
| parent | a2bec0784465d3e30eadc20b49c779fa77d42dad (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.c | 23 |
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; |