From 1ec2772e0c3ca3159035c03165355e355efc326b Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 20 Aug 2015 17:28:44 +0200
Subject: s390/diag: add a statistic for diagnose calls

Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose
calls have been done by each CPU in the system.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/hypfs/hypfs_diag.c   | 10 +++++++++-
 arch/s390/hypfs/hypfs_diag0c.c |  2 ++
 arch/s390/hypfs/hypfs_sprp.c   |  9 ++++++++-
 arch/s390/hypfs/hypfs_vm.c     |  2 ++
 4 files changed, 21 insertions(+), 2 deletions(-)

(limited to 'arch/s390/hypfs')

diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index 5eeffeefae06..045035796ca7 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -15,6 +15,7 @@
 #include <linux/string.h>
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
+#include <asm/diag.h>
 #include <asm/ebcdic.h>
 #include "hypfs.h"
 
@@ -336,7 +337,7 @@ static inline __u64 phys_cpu__ctidx(enum diag204_format type, void *hdr)
 
 /* Diagnose 204 functions */
 
-static int diag204(unsigned long subcode, unsigned long size, void *addr)
+static inline int __diag204(unsigned long subcode, unsigned long size, void *addr)
 {
 	register unsigned long _subcode asm("0") = subcode;
 	register unsigned long _size asm("1") = size;
@@ -351,6 +352,12 @@ static int diag204(unsigned long subcode, unsigned long size, void *addr)
 	return _size;
 }
 
+static int diag204(unsigned long subcode, unsigned long size, void *addr)
+{
+	diag_stat_inc(DIAG_STAT_X204);
+	return __diag204(subcode, size, addr);
+}
+
 /*
  * For the old diag subcode 4 with simple data format we have to use real
  * memory. If we use subcode 6 or 7 with extended data format, we can (and
@@ -505,6 +512,7 @@ static int diag224(void *ptr)
 {
 	int rc = -EOPNOTSUPP;
 
+	diag_stat_inc(DIAG_STAT_X224);
 	asm volatile(
 		"	diag	%1,%2,0x224\n"
 		"0:	lhi	%0,0x0\n"
diff --git a/arch/s390/hypfs/hypfs_diag0c.c b/arch/s390/hypfs/hypfs_diag0c.c
index 24c747a0fcc3..0f1927cbba31 100644
--- a/arch/s390/hypfs/hypfs_diag0c.c
+++ b/arch/s390/hypfs/hypfs_diag0c.c
@@ -8,6 +8,7 @@
 
 #include <linux/slab.h>
 #include <linux/cpu.h>
+#include <asm/diag.h>
 #include <asm/hypfs.h>
 #include "hypfs.h"
 
@@ -18,6 +19,7 @@
  */
 static void diag0c(struct hypfs_diag0c_entry *entry)
 {
+	diag_stat_inc(DIAG_STAT_X00C);
 	asm volatile (
 		"	sam31\n"
 		"	diag	%0,%0,0x0c\n"
diff --git a/arch/s390/hypfs/hypfs_sprp.c b/arch/s390/hypfs/hypfs_sprp.c
index dd42a26d049d..c9e5c72f78bd 100644
--- a/arch/s390/hypfs/hypfs_sprp.c
+++ b/arch/s390/hypfs/hypfs_sprp.c
@@ -13,6 +13,7 @@
 #include <linux/types.h>
 #include <linux/uaccess.h>
 #include <asm/compat.h>
+#include <asm/diag.h>
 #include <asm/sclp.h>
 #include "hypfs.h"
 
@@ -22,7 +23,7 @@
 
 #define DIAG304_CMD_MAX		2
 
-static unsigned long hypfs_sprp_diag304(void *data, unsigned long cmd)
+static inline unsigned long __hypfs_sprp_diag304(void *data, unsigned long cmd)
 {
 	register unsigned long _data asm("2") = (unsigned long) data;
 	register unsigned long _rc asm("3");
@@ -34,6 +35,12 @@ static unsigned long hypfs_sprp_diag304(void *data, unsigned long cmd)
 	return _rc;
 }
 
+static unsigned long hypfs_sprp_diag304(void *data, unsigned long cmd)
+{
+	diag_stat_inc(DIAG_STAT_X304);
+	return __hypfs_sprp_diag304(data, cmd);
+}
+
 static void hypfs_sprp_free(const void *data)
 {
 	free_page((unsigned long) data);
diff --git a/arch/s390/hypfs/hypfs_vm.c b/arch/s390/hypfs/hypfs_vm.c
index afbe07907c10..44feac38ccfc 100644
--- a/arch/s390/hypfs/hypfs_vm.c
+++ b/arch/s390/hypfs/hypfs_vm.c
@@ -9,6 +9,7 @@
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/vmalloc.h>
+#include <asm/diag.h>
 #include <asm/ebcdic.h>
 #include <asm/timex.h>
 #include "hypfs.h"
@@ -66,6 +67,7 @@ static int diag2fc(int size, char* query, void *addr)
 	memset(parm_list.aci_grp, 0x40, NAME_LEN);
 	rc = -1;
 
+	diag_stat_inc(DIAG_STAT_X2FC);
 	asm volatile(
 		"	diag    %0,%1,0x2fc\n"
 		"0:\n"
-- 
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