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[S390] chsc_sch: add support for irq statistics

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Add support for CHSC I/O interrupt statistics in /proc/interrupts.

Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2011-10-30 15:16:54 +01:00 committed by Martin Schwidefsky
parent dad572e370
commit 65b4e403ac
3 changed files with 6 additions and 1 deletions
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1
arch/s390/include/asm/irq.h
View File

@ -28,6 +28,7 @@ enum interruption_class {
IOINT_CLW,
IOINT_CTC,
IOINT_APB,
IOINT_CSC,
NMI_NMI,
NR_IRQS,
};

1
arch/s390/kernel/irq.c
View File

@ -53,6 +53,7 @@ static const struct irq_class intrclass_names[] = {
{.name = "CLW", .desc = "[I/O] CLAW" },
{.name = "CTC", .desc = "[I/O] CTC" },
{.name = "APB", .desc = "[I/O] AP Bus" },
{.name = "CSC", .desc = "[I/O] CHSC Subchannel" },
{.name = "NMI", .desc = "[NMI] Machine Check" },
};

5
drivers/s390/cio/chsc_sch.c
View File

@ -1,7 +1,7 @@
/*
* Driver for s390 chsc subchannels
*
* Copyright IBM Corp. 2008, 2009
* Copyright IBM Corp. 2008, 2011
*
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
*
@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
#include <linux/kernel_stat.h>
#include <asm/compat.h>
#include <asm/cio.h>
@ -56,6 +57,8 @@ static void chsc_subchannel_irq(struct subchannel *sch)
CHSC_LOG(4, "irb");
CHSC_LOG_HEX(4, irb, sizeof(*irb));
kstat_cpu(smp_processor_id()).irqs[IOINT_CSC]++;
/* Copy irb to provided request and set done. */
if (!request) {
CHSC_MSG(0, "Interrupt on sch 0.%x.%04x with no request\n",