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s390/diag: add a statistic for diagnose calls

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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>
This commit is contained in:
Martin Schwidefsky
2015-08-20 17:28:44 +02:00
parent acdc9fc9a8
commit 1ec2772e0c
19 changed files with 282 additions and 19 deletions
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arch/s390/kernel/cpcmd.c
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@@ -14,6 +14,7 @@
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <asm/diag.h>
#include <asm/ebcdic.h>
#include <asm/cpcmd.h>
#include <asm/io.h>
@@ -70,6 +71,7 @@ int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
memcpy(cpcmd_buf, cmd, cmdlen);
ASCEBC(cpcmd_buf, cmdlen);
diag_stat_inc(DIAG_STAT_X008);
if (response) {
memset(response, 0, rlen);
response_len = rlen;