linux-kernel - [PATCH v4 2/5] PM: domains: Add the domain HW-managed mode to the summary

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240122-gdsc-hwctrl-v4-2-9061e8a7aa07@linaro.org>
Date: Mon, 22 Jan 2024 10:47:02 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Kevin Hilman <khilman@...nel.org>, Ulf Hansson <ulf.hansson@...aro.org>, 
 Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Bjorn Andersson <andersson@...nel.org>, Andy Gross <agross@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, 
 Stanimir Varbanov <stanimir.k.varbanov@...il.com>, 
 Vikash Garodia <quic_vgarodia@...cinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Taniya Das <quic_tdas@...cinc.com>, Jagadeesh Kona <quic_jkona@...cinc.com>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
 linux-media@...r.kernel.org, Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH v4 2/5] PM: domains: Add the domain HW-managed mode to the
 summary

Now that genpd supports dynamically switching the control for an
attached device between hardware- and software-mode,  let's add this
information to the genpd summary in debugfs.

Suggested-by: Taniya Das <quic_tdas@...cinc.com>
Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Reviewed-by: Bjorn Andersson <andersson@...nel.org>
---
 drivers/pmdomain/core.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 41b6411d0ef5..841fde9e9f87 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -3147,6 +3147,15 @@ static void rtpm_status_str(struct seq_file *s, struct device *dev)
 	seq_printf(s, "%-25s  ", p);
 }

+static void mode_status_str(struct seq_file *s, struct device *dev)
+{
+	struct generic_pm_domain_data *gpd_data;
+
+	gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
+
+	seq_printf(s, "%20s", gpd_data->hw_mode ? "HW" : "SW");
+}
+
 static void perf_status_str(struct seq_file *s, struct device *dev)
 {
 	struct generic_pm_domain_data *gpd_data;
@@ -3205,6 +3214,7 @@ static int genpd_summary_one(struct seq_file *s,
 		seq_printf(s, "\n    %-50s  ", kobj_path);
 		rtpm_status_str(s, pm_data->dev);
 		perf_status_str(s, pm_data->dev);
+		mode_status_str(s, pm_data->dev);
 		kfree(kobj_path);
 	}

@@ -3221,8 +3231,8 @@ static int summary_show(struct seq_file *s, void *data)
 	int ret = 0;

 	seq_puts(s, "domain                          status          children                           performance\n");
-	seq_puts(s, "    /device                                             runtime status\n");
-	seq_puts(s, "----------------------------------------------------------------------------------------------\n");
+	seq_puts(s, "    /device                                             runtime status                           managed by\n");
+	seq_puts(s, "------------------------------------------------------------------------------------------------------------\n");

 	ret = mutex_lock_interruptible(&gpd_list_lock);
 	if (ret)

-- 
2.34.1