diff options
| author | Rajneesh Bhardwaj | 2017-06-23 22:22:35 +0530 |
|---|---|---|
| committer | Darren Hart (VMware) | 2017-07-05 11:26:35 -0700 |
| commit | bc8c47abd486014aae543ecdea59554f098df9df (patch) | |
| tree | b6c9d0c74c04bb234fe792f8834e36f74900969d | |
| parent | 7a3a51ab9467fb634dcfcd18eade61f418f540dd (diff) | |
platform/x86: intel_telemetry: Add debugfs entry for S0ix residency
This adds a debugfs consumer for the exported kernel API
intel_pmc_read_s0ix_residency. This debugfs entry reads S0ix residency
directly from the PMC hardware counters.
TEST:
- echo freeze > /sys/power/state
- Wake the system, read the S0ix residency i.e.
cat /sys/kernel/debug/telemetry/s0ix_residency_usec
Signed-off-by: Shanth Murthy <shanth.murthy@intel.com>
Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
| -rw-r--r-- | drivers/platform/x86/intel_telemetry_debugfs.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel_telemetry_debugfs.c b/drivers/platform/x86/intel_telemetry_debugfs.c index b8be058a8754..cd21df982abd 100644 --- a/drivers/platform/x86/intel_telemetry_debugfs.c +++ b/drivers/platform/x86/intel_telemetry_debugfs.c @@ -710,6 +710,24 @@ static const struct file_operations telem_socstate_ops = { .release = single_release, }; +static int telem_s0ix_res_get(void *data, u64 *val) +{ + u64 s0ix_total_res; + int ret; + + ret = intel_pmc_s0ix_counter_read(&s0ix_total_res); + if (ret) { + pr_err("Failed to read S0ix residency"); + return ret; + } + + *val = s0ix_total_res; + + return 0; +} + +DEFINE_DEBUGFS_ATTRIBUTE(telem_s0ix_fops, telem_s0ix_res_get, NULL, "%llu\n"); + static int telem_pss_trc_verb_show(struct seq_file *s, void *unused) { u32 verbosity; @@ -987,6 +1005,14 @@ static int __init telemetry_debugfs_init(void) goto out; } + f = debugfs_create_file("s0ix_residency_usec", S_IFREG | S_IRUGO, + debugfs_conf->telemetry_dbg_dir, + NULL, &telem_s0ix_fops); + if (!f) { + pr_err("s0ix_residency_usec debugfs register failed\n"); + goto out; + } + f = debugfs_create_file("pss_trace_verbosity", S_IFREG | S_IRUGO, debugfs_conf->telemetry_dbg_dir, NULL, &telem_pss_trc_verb_ops); |