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s390/diag: add a statistic for diagnose calls

Browse source 
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 <[email protected]>
This commit is contained in:
Martin Schwidefsky 2015-08-20 17:28:44 +02:00
commit 1ec2772e0c
19 changed files with 282 additions and 19 deletions
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2
drivers/s390/block/dasd_diag.c
View file

@ -21,6 +21,7 @@
#include <asm/dasd.h>
#include <asm/debug.h>
#include <asm/diag.h>
#include <asm/ebcdic.h>
#include <asm/io.h>
#include <asm/irq.h>
@ -76,6 +77,7 @@ static inline int dia250(void *iob, int cmd)
int rc;
rc = 3;
diag_stat_inc(DIAG_STAT_X250);
asm volatile(
" diag 2,%2,0x250\n"
"0: ipm %0\n"

2
drivers/s390/char/diag_ftp.c
View file

@ -15,6 +15,7 @@
#include <linux/wait.h>
#include <linux/string.h>
#include <asm/ctl_reg.h>
#include <asm/diag.h>
#include "hmcdrv_ftp.h"
#include "diag_ftp.h"
@ -102,6 +103,7 @@ static int diag_ftp_2c4(struct diag_ftp_ldfpl *fpl,
{
int rc;
diag_stat_inc(DIAG_STAT_X2C4);
asm volatile(
" diag %[addr],%[cmd],0x2c4\n"
"0: j 2f\n"

15
drivers/s390/virtio/virtio_ccw.c
View file

@ -28,6 +28,7 @@
#include <linux/io.h>
#include <linux/kvm_para.h>
#include <linux/notifier.h>
#include <asm/diag.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/cio.h>
@ -366,9 +367,9 @@ static void virtio_ccw_drop_indicator(struct virtio_ccw_device *vcdev,
kfree(thinint_area);
}
static inline long do_kvm_notify(struct subchannel_id schid,
unsigned long queue_index,
long cookie)
static inline long __do_kvm_notify(struct subchannel_id schid,
unsigned long queue_index,
long cookie)
{
register unsigned long __nr asm("1") = KVM_S390_VIRTIO_CCW_NOTIFY;
register struct subchannel_id __schid asm("2") = schid;
@ -383,6 +384,14 @@ static inline long do_kvm_notify(struct subchannel_id schid,
return __rc;
}
static inline long do_kvm_notify(struct subchannel_id schid,
unsigned long queue_index,
long cookie)
{
diag_stat_inc(DIAG_STAT_X500);
return __do_kvm_notify(schid, queue_index, cookie);
}
static bool virtio_ccw_kvm_notify(struct virtqueue *vq)
{
struct virtio_ccw_vq_info *info = vq->priv;