scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-meson-vrtc.c b/drivers/rtc/rtc-meson-vrtc.c
new file mode 100644
index 000000000..7d38258cb
--- /dev/null
+++ b/drivers/rtc/rtc-meson-vrtc.c
@@ -0,0 +1,150 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
+ */
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/time64.h>
+
+struct meson_vrtc_data {
+	void __iomem *io_alarm;
+	unsigned long alarm_time;
+	bool enabled;
+};
+
+static int meson_vrtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct timespec64 time;
+
+	dev_dbg(dev, "%s\n", __func__);
+	ktime_get_real_ts64(&time);
+	rtc_time64_to_tm(time.tv_sec, tm);
+
+	return 0;
+}
+
+static void meson_vrtc_set_wakeup_time(struct meson_vrtc_data *vrtc,
+				       unsigned long time)
+{
+	writel_relaxed(time, vrtc->io_alarm);
+}
+
+static int meson_vrtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
+{
+	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
+
+	dev_dbg(dev, "%s: alarm->enabled=%d\n", __func__, alarm->enabled);
+	if (alarm->enabled)
+		vrtc->alarm_time = rtc_tm_to_time64(&alarm->time);
+	else
+		vrtc->alarm_time = 0;
+
+	return 0;
+}
+
+static int meson_vrtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
+
+	vrtc->enabled = enabled;
+	return 0;
+}
+
+static const struct rtc_class_ops meson_vrtc_ops = {
+	.read_time = meson_vrtc_read_time,
+	.set_alarm = meson_vrtc_set_alarm,
+	.alarm_irq_enable = meson_vrtc_alarm_irq_enable,
+};
+
+static int meson_vrtc_probe(struct platform_device *pdev)
+{
+	struct meson_vrtc_data *vrtc;
+	struct rtc_device *rtc;
+
+	vrtc = devm_kzalloc(&pdev->dev, sizeof(*vrtc), GFP_KERNEL);
+	if (!vrtc)
+		return -ENOMEM;
+
+	vrtc->io_alarm = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(vrtc->io_alarm))
+		return PTR_ERR(vrtc->io_alarm);
+
+	device_init_wakeup(&pdev->dev, true);
+
+	platform_set_drvdata(pdev, vrtc);
+
+	rtc = devm_rtc_allocate_device(&pdev->dev);
+	if (IS_ERR(rtc))
+		return PTR_ERR(rtc);
+
+	rtc->ops = &meson_vrtc_ops;
+	return devm_rtc_register_device(rtc);
+}
+
+static int __maybe_unused meson_vrtc_suspend(struct device *dev)
+{
+	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
+
+	dev_dbg(dev, "%s\n", __func__);
+	if (vrtc->alarm_time) {
+		unsigned long local_time;
+		long alarm_secs;
+		struct timespec64 time;
+
+		ktime_get_real_ts64(&time);
+		local_time = time.tv_sec;
+
+		dev_dbg(dev, "alarm_time = %lus, local_time=%lus\n",
+			vrtc->alarm_time, local_time);
+		alarm_secs = vrtc->alarm_time - local_time;
+		if (alarm_secs > 0) {
+			meson_vrtc_set_wakeup_time(vrtc, alarm_secs);
+			dev_dbg(dev, "system will wakeup in %lds.\n",
+				alarm_secs);
+		} else {
+			dev_err(dev, "alarm time already passed: %lds.\n",
+				alarm_secs);
+		}
+	}
+
+	return 0;
+}
+
+static int __maybe_unused meson_vrtc_resume(struct device *dev)
+{
+	struct meson_vrtc_data *vrtc = dev_get_drvdata(dev);
+
+	dev_dbg(dev, "%s\n", __func__);
+
+	vrtc->alarm_time = 0;
+	meson_vrtc_set_wakeup_time(vrtc, 0);
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(meson_vrtc_pm_ops,
+			 meson_vrtc_suspend, meson_vrtc_resume);
+
+static const struct of_device_id meson_vrtc_dt_match[] = {
+	{ .compatible = "amlogic,meson-vrtc"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, meson_vrtc_dt_match);
+
+static struct platform_driver meson_vrtc_driver = {
+	.probe = meson_vrtc_probe,
+	.driver = {
+		.name = "meson-vrtc",
+		.of_match_table = meson_vrtc_dt_match,
+		.pm = &meson_vrtc_pm_ops,
+	},
+};
+
+module_platform_driver(meson_vrtc_driver);
+
+MODULE_DESCRIPTION("Amlogic Virtual Wakeup RTC Timer driver");
+MODULE_LICENSE("GPL");