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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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37
arch/s390/include/asm/diag.h
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@@ -8,6 +8,42 @@
#ifndef _ASM_S390_DIAG_H
#define _ASM_S390_DIAG_H
#include <linux/percpu.h>
enum diag_stat_enum {
DIAG_STAT_X008,
DIAG_STAT_X00C,
DIAG_STAT_X010,
DIAG_STAT_X014,
DIAG_STAT_X044,
DIAG_STAT_X064,
DIAG_STAT_X09C,
DIAG_STAT_X0DC,
DIAG_STAT_X204,
DIAG_STAT_X210,
DIAG_STAT_X224,
DIAG_STAT_X250,
DIAG_STAT_X258,
DIAG_STAT_X288,
DIAG_STAT_X2C4,
DIAG_STAT_X2FC,
DIAG_STAT_X304,
DIAG_STAT_X308,
DIAG_STAT_X500,
NR_DIAG_STAT
};
struct diag_stat {
unsigned int counter[NR_DIAG_STAT];
};
DECLARE_PER_CPU(struct diag_stat, diag_stat);
static inline void diag_stat_inc(enum diag_stat_enum nr)
{
this_cpu_inc(diag_stat.counter[nr]);
}
/*
* Diagnose 10: Release page range
*/
@@ -18,6 +54,7 @@ static inline void diag10_range(unsigned long start_pfn, unsigned long num_pfn)
start_addr = start_pfn << PAGE_SHIFT;
end_addr = (start_pfn + num_pfn - 1) << PAGE_SHIFT;
diag_stat_inc(DIAG_STAT_X010);
asm volatile(
"0: diag %0,%1,0x10\n"
"1:\n"