Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/arch/s390/appldata/appldata_os.c b/arch/s390/appldata/appldata_os.c
new file mode 100644
index 000000000..433a994b1
--- /dev/null
+++ b/arch/s390/appldata/appldata_os.c
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Data gathering module for Linux-VM Monitor Stream, Stage 1.
+ * Collects misc. OS related data (CPU utilization, running processes).
+ *
+ * Copyright IBM Corp. 2003, 2006
+ *
+ * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
+ */
+
+#define KMSG_COMPONENT	"appldata"
+#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/kernel_stat.h>
+#include <linux/netdevice.h>
+#include <linux/sched.h>
+#include <linux/sched/loadavg.h>
+#include <linux/sched/stat.h>
+#include <asm/appldata.h>
+#include <asm/smp.h>
+
+#include "appldata.h"
+
+
+#define LOAD_INT(x) ((x) >> FSHIFT)
+#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
+
+/*
+ * OS data
+ *
+ * This is accessed as binary data by z/VM. If changes to it can't be avoided,
+ * the structure version (product ID, see appldata_base.c) needs to be changed
+ * as well and all documentation and z/VM applications using it must be
+ * updated.
+ *
+ * The record layout is documented in the Linux for zSeries Device Drivers
+ * book:
+ * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
+ */
+struct appldata_os_per_cpu {
+	u32 per_cpu_user;	/* timer ticks spent in user mode   */
+	u32 per_cpu_nice;	/* ... spent with modified priority */
+	u32 per_cpu_system;	/* ... spent in kernel mode         */
+	u32 per_cpu_idle;	/* ... spent in idle mode           */
+
+	/* New in 2.6 */
+	u32 per_cpu_irq;	/* ... spent in interrupts          */
+	u32 per_cpu_softirq;	/* ... spent in softirqs            */
+	u32 per_cpu_iowait;	/* ... spent while waiting for I/O  */
+
+	/* New in modification level 01 */
+	u32 per_cpu_steal;	/* ... stolen by hypervisor	    */
+	u32 cpu_id;		/* number of this CPU		    */
+} __attribute__((packed));
+
+struct appldata_os_data {
+	u64 timestamp;
+	u32 sync_count_1;	/* after VM collected the record data, */
+	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the
+				   same. If not, the record has been updated on
+				   the Linux side while VM was collecting the
+				   (possibly corrupt) data */
+
+	u32 nr_cpus;		/* number of (virtual) CPUs        */
+	u32 per_cpu_size;	/* size of the per-cpu data struct */
+	u32 cpu_offset;		/* offset of the first per-cpu data struct */
+
+	u32 nr_running;		/* number of runnable threads      */
+	u32 nr_threads;		/* number of threads               */
+	u32 avenrun[3];		/* average nr. of running processes during */
+				/* the last 1, 5 and 15 minutes */
+
+	/* New in 2.6 */
+	u32 nr_iowait;		/* number of blocked threads
+				   (waiting for I/O)               */
+
+	/* per cpu data */
+	struct appldata_os_per_cpu os_cpu[0];
+} __attribute__((packed));
+
+static struct appldata_os_data *appldata_os_data;
+
+static struct appldata_ops ops = {
+	.name	   = "os",
+	.record_nr = APPLDATA_RECORD_OS_ID,
+	.owner	   = THIS_MODULE,
+	.mod_lvl   = {0xF0, 0xF1},		/* EBCDIC "01" */
+};
+
+
+/*
+ * appldata_get_os_data()
+ *
+ * gather OS data
+ */
+static void appldata_get_os_data(void *data)
+{
+	int i, j, rc;
+	struct appldata_os_data *os_data;
+	unsigned int new_size;
+
+	os_data = data;
+	os_data->sync_count_1++;
+
+	os_data->nr_threads = nr_threads;
+	os_data->nr_running = nr_running();
+	os_data->nr_iowait  = nr_iowait();
+	os_data->avenrun[0] = avenrun[0] + (FIXED_1/200);
+	os_data->avenrun[1] = avenrun[1] + (FIXED_1/200);
+	os_data->avenrun[2] = avenrun[2] + (FIXED_1/200);
+
+	j = 0;
+	for_each_online_cpu(i) {
+		os_data->os_cpu[j].per_cpu_user =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_USER]);
+		os_data->os_cpu[j].per_cpu_nice =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_NICE]);
+		os_data->os_cpu[j].per_cpu_system =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM]);
+		os_data->os_cpu[j].per_cpu_idle =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IDLE]);
+		os_data->os_cpu[j].per_cpu_irq =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IRQ]);
+		os_data->os_cpu[j].per_cpu_softirq =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ]);
+		os_data->os_cpu[j].per_cpu_iowait =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_IOWAIT]);
+		os_data->os_cpu[j].per_cpu_steal =
+			nsecs_to_jiffies(kcpustat_cpu(i).cpustat[CPUTIME_STEAL]);
+		os_data->os_cpu[j].cpu_id = i;
+		j++;
+	}
+
+	os_data->nr_cpus = j;
+
+	new_size = sizeof(struct appldata_os_data) +
+		   (os_data->nr_cpus * sizeof(struct appldata_os_per_cpu));
+	if (ops.size != new_size) {
+		if (ops.active) {
+			rc = appldata_diag(APPLDATA_RECORD_OS_ID,
+					   APPLDATA_START_INTERVAL_REC,
+					   (unsigned long) ops.data, new_size,
+					   ops.mod_lvl);
+			if (rc != 0)
+				pr_err("Starting a new OS data collection "
+				       "failed with rc=%d\n", rc);
+
+			rc = appldata_diag(APPLDATA_RECORD_OS_ID,
+					   APPLDATA_STOP_REC,
+					   (unsigned long) ops.data, ops.size,
+					   ops.mod_lvl);
+			if (rc != 0)
+				pr_err("Stopping a faulty OS data "
+				       "collection failed with rc=%d\n", rc);
+		}
+		ops.size = new_size;
+	}
+	os_data->timestamp = get_tod_clock();
+	os_data->sync_count_2++;
+}
+
+
+/*
+ * appldata_os_init()
+ *
+ * init data, register ops
+ */
+static int __init appldata_os_init(void)
+{
+	int rc, max_size;
+
+	max_size = sizeof(struct appldata_os_data) +
+		   (num_possible_cpus() * sizeof(struct appldata_os_per_cpu));
+	if (max_size > APPLDATA_MAX_REC_SIZE) {
+		pr_err("Maximum OS record size %i exceeds the maximum "
+		       "record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	appldata_os_data = kzalloc(max_size, GFP_KERNEL | GFP_DMA);
+	if (appldata_os_data == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu);
+	appldata_os_data->cpu_offset   = offsetof(struct appldata_os_data,
+							os_cpu);
+
+	ops.data = appldata_os_data;
+	ops.callback  = &appldata_get_os_data;
+	rc = appldata_register_ops(&ops);
+	if (rc != 0)
+		kfree(appldata_os_data);
+out:
+	return rc;
+}
+
+/*
+ * appldata_os_exit()
+ *
+ * unregister ops
+ */
+static void __exit appldata_os_exit(void)
+{
+	appldata_unregister_ops(&ops);
+	kfree(appldata_os_data);
+}
+
+
+module_init(appldata_os_init);
+module_exit(appldata_os_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Gerald Schaefer");
+MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics");