Commit 65b4e403 authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

[S390] chsc_sch: add support for irq statistics 



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

Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent dad572e3

arch/s390/include/asm/irq.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ enum interruption_class { 
	IOINT_CLW,

	IOINT_CTC,

	IOINT_APB,

	IOINT_CSC,

	NMI_NMI,

	NR_IRQS,

};

arch/s390/kernel/irq.c

+1 −0
Original line number Diff line number Diff line
@@ -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" },

};

drivers/s390/cio/chsc_sch.c

+4 −1
Original line number Diff line number Diff line 
/*

 * 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",