Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 165 insertions, 0 deletions

diff --git a/arch/s390/appldata/appldata_mem.c b/arch/s390/appldata/appldata_mem.c
new file mode 100644
index 000000000..e68136c3c
--- /dev/null
+++ b/arch/s390/appldata/appldata_mem.c
@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Data gathering module for Linux-VM Monitor Stream, Stage 1.
+ * Collects data related to memory management.
+ *
+ * Copyright IBM Corp. 2003, 2006
+ *
+ * Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel_stat.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+
+#include "appldata.h"
+
+
+#define P2K(x) ((x) << (PAGE_SHIFT - 10))	/* Converts #Pages to KB */
+
+/*
+ * Memory 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_mem_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 */
+
+	u64 pgpgin;		/* data read from disk  */
+	u64 pgpgout;		/* data written to disk */
+	u64 pswpin;		/* pages swapped in  */
+	u64 pswpout;		/* pages swapped out */
+
+	u64 sharedram;		/* sharedram is currently set to 0 */
+
+	u64 totalram;		/* total main memory size */
+	u64 freeram;		/* free main memory size  */
+	u64 totalhigh;		/* total high memory size */
+	u64 freehigh;		/* free high memory size  */
+
+	u64 bufferram;		/* memory reserved for buffers, free cache */
+	u64 cached;		/* size of (used) cache, w/o buffers */
+	u64 totalswap;		/* total swap space size */
+	u64 freeswap;		/* free swap space */
+
+// New in 2.6 -->
+	u64 pgalloc;		/* page allocations */
+	u64 pgfault;		/* page faults (major+minor) */
+	u64 pgmajfault;		/* page faults (major only) */
+// <-- New in 2.6
+
+} __packed;
+
+
+/*
+ * appldata_get_mem_data()
+ *
+ * gather memory data
+ */
+static void appldata_get_mem_data(void *data)
+{
+	/*
+	 * don't put large structures on the stack, we are
+	 * serialized through the appldata_ops_mutex and can use static
+	 */
+	static struct sysinfo val;
+	unsigned long ev[NR_VM_EVENT_ITEMS];
+	struct appldata_mem_data *mem_data;
+
+	mem_data = data;
+	mem_data->sync_count_1++;
+
+	all_vm_events(ev);
+	mem_data->pgpgin     = ev[PGPGIN] >> 1;
+	mem_data->pgpgout    = ev[PGPGOUT] >> 1;
+	mem_data->pswpin     = ev[PSWPIN];
+	mem_data->pswpout    = ev[PSWPOUT];
+	mem_data->pgalloc    = ev[PGALLOC_NORMAL];
+	mem_data->pgalloc    += ev[PGALLOC_DMA];
+	mem_data->pgfault    = ev[PGFAULT];
+	mem_data->pgmajfault = ev[PGMAJFAULT];
+
+	si_meminfo(&val);
+	mem_data->sharedram = val.sharedram;
+	mem_data->totalram  = P2K(val.totalram);
+	mem_data->freeram   = P2K(val.freeram);
+	mem_data->totalhigh = P2K(val.totalhigh);
+	mem_data->freehigh  = P2K(val.freehigh);
+	mem_data->bufferram = P2K(val.bufferram);
+	mem_data->cached    = P2K(global_node_page_state(NR_FILE_PAGES)
+				- val.bufferram);
+
+	si_swapinfo(&val);
+	mem_data->totalswap = P2K(val.totalswap);
+	mem_data->freeswap  = P2K(val.freeswap);
+
+	mem_data->timestamp = get_tod_clock();
+	mem_data->sync_count_2++;
+}
+
+
+static struct appldata_ops ops = {
+	.name      = "mem",
+	.record_nr = APPLDATA_RECORD_MEM_ID,
+	.size	   = sizeof(struct appldata_mem_data),
+	.callback  = &appldata_get_mem_data,
+	.owner     = THIS_MODULE,
+	.mod_lvl   = {0xF0, 0xF0},		/* EBCDIC "00" */
+};
+
+
+/*
+ * appldata_mem_init()
+ *
+ * init_data, register ops
+ */
+static int __init appldata_mem_init(void)
+{
+	int ret;
+
+	ops.data = kzalloc(sizeof(struct appldata_mem_data), GFP_KERNEL);
+	if (!ops.data)
+		return -ENOMEM;
+
+	ret = appldata_register_ops(&ops);
+	if (ret)
+		kfree(ops.data);
+
+	return ret;
+}
+
+/*
+ * appldata_mem_exit()
+ *
+ * unregister ops
+ */
+static void __exit appldata_mem_exit(void)
+{
+	appldata_unregister_ops(&ops);
+	kfree(ops.data);
+}
+
+
+module_init(appldata_mem_init);
+module_exit(appldata_mem_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Gerald Schaefer");
+MODULE_DESCRIPTION("Linux-VM Monitor Stream, MEMORY statistics");