62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
|
/*
|
||
|
|
* irq.c: API for in kernel interrupt controller
|
||
|
|
* Copyright (c) 2007, Intel Corporation.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify it
|
||
|
|
* under the terms and conditions of the GNU General Public License,
|
||
|
|
* version 2, as published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||
|
|
* more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along with
|
||
|
|
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
|
||
|
|
* Place - Suite 330, Boston, MA 02111-1307 USA.
|
||
|
|
* Authors:
|
||
|
|
* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
#include "kvm.h"
|
||
|
|
#include "irq.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* check if there is pending interrupt without
|
||
|
|
* intack.
|
||
|
|
*/
|
||
|
|
int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
|
||
|
|
{
|
||
|
|
struct kvm_pic *s = pic_irqchip(v->kvm);
|
||
|
|
|
||
|
|
if (s->output) /* PIC */
|
||
|
|
return 1;
|
||
|
|
/*
|
||
|
|
* TODO: APIC
|
||
|
|
*/
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read pending interrupt vector and intack.
|
||
|
|
*/
|
||
|
|
int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
|
||
|
|
{
|
||
|
|
struct kvm_pic *s = pic_irqchip(v->kvm);
|
||
|
|
int vector;
|
||
|
|
|
||
|
|
s->output = 0;
|
||
|
|
vector = kvm_pic_read_irq(s);
|
||
|
|
if (vector != -1)
|
||
|
|
return vector;
|
||
|
|
/*
|
||
|
|
* TODO: APIC
|
||
|
|
*/
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
|