提交 33b412ac 编写于 作者: T Thomas Huth 提交者: Christian Borntraeger

KVM: s390: Use insn_length() to calculate length of instruction

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: NThomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: NJens Freimann <jfrei@linux.vnet.ibm.com>
Reviewed-by: NDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
上级 492d8642
/*
* 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:
......
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