[deliverable/linux.git] / drivers / kvm / irq.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);
Commit	Line	Data
85f455f7 ED	1	/*
	2	* irq.c: API for in kernel interrupt controller
	3	* Copyright (c) 2007, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along with
	15	* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
	16	* Place - Suite 330, Boston, MA 02111-1307 USA.
	17	* Authors:
	18	* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
	19	*
	20	*/
	21
	22	#include <linux/module.h>
	23
	24	#include "kvm.h"
	25	#include "irq.h"
	26
	27	/*
	28	* check if there is pending interrupt without
	29	* intack.
	30	*/
	31	int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
	32	{
	33	struct kvm_pic *s = pic_irqchip(v->kvm);
	34
	35	if (s->output) /* PIC */
	36	return 1;
	37	/*
	38	* TODO: APIC
	39	*/
	40	return 0;
	41	}
	42	EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);
	43
	44	/*
	45	* Read pending interrupt vector and intack.
	46	*/
	47	int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
	48	{
	49	struct kvm_pic *s = pic_irqchip(v->kvm);
	50	int vector;
	51
	52	s->output = 0;
	53	vector = kvm_pic_read_irq(s);
	54	if (vector != -1)
	55	return vector;
	56	/*
	57	* TODO: APIC
	58	*/
	59	return -1;
	60	}
	61	EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);