From: Thomas Huth <thuth@xxxxxxxxxxxxxxxxxx>
The common s390 function insn_length() results in slightly smaller
(and thus hopefully faster) code than the calculation of the
instruction length via a lookup-table. So let's use that function
in the interrupt delivery code, too.
Signed-off-by: Thomas Huth <thuth@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Jens Freimann <jfrei@xxxxxxxxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <dahi@xxxxxxxxxxxxxxxxxx>
Acked-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
arch/s390/kvm/interrupt.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 98a3131..9561e1d 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -1,7 +1,7 @@
/*
* handling kvm guest interrupts
*
- * Copyright IBM Corp. 2008,2014
+ * Copyright IBM Corp. 2008, 2015
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/bitmap.h>
#include <asm/asm-offsets.h>
+#include <asm/dis.h>
#include <asm/uaccess.h>
#include <asm/sclp.h>
#include "kvm-s390.h"
@@ -265,8 +266,6 @@ static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
static u16 get_ilc(struct kvm_vcpu *vcpu)
{
- const unsigned short table[] = { 2, 4, 4, 6 };
-
switch (vcpu->arch.sie_block->icptcode) {
case ICPT_INST:
case ICPT_INSTPROGI:
@@ -274,7 +273,7 @@ static u16 get_ilc(struct kvm_vcpu *vcpu)
case ICPT_PARTEXEC:
case ICPT_IOINST:
/* last instruction only stored for these icptcodes */
- return table[vcpu->arch.sie_block->ipa >> 14];
+ return insn_length(vcpu->arch.sie_block->ipa >> 8);
case ICPT_PROGI:
return vcpu->arch.sie_block->pgmilc;
default:
--
2.3.0
--
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