Release 4.14 arch/x86/kvm/irq.c

/*
 * irq.c: API for in kernel interrupt controller
 * Copyright (c) 2007, Intel Corporation.
 * Copyright 2009 Red Hat, Inc. and/or its affiliates.
 *
 * 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/export.h>
#include <linux/kvm_host.h>

#include "irq.h"
#include "i8254.h"
#include "x86.h"

/*
 * check if there are pending timer events
 * to be processed.
 */


int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
	if (lapic_in_kernel(vcpu))
		return apic_has_pending_timer(vcpu);

	return 0;
}
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3
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EXPORT_SYMBOL(kvm_cpu_has_pending_timer);

/*
 * check if there is a pending userspace external interrupt
 */


static int pending_userspace_extint(struct kvm_vcpu *v)
{
	return v->arch.pending_external_vector != -1;
}

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/*
 * check if there is pending interrupt from
 * non-APIC source without intack.
 */


static int kvm_cpu_has_extint(struct kvm_vcpu *v)
{
	u8 accept = kvm_apic_accept_pic_intr(v);

	if (accept) {
		if (irqchip_split(v->kvm))
			return pending_userspace_extint(v);
		else
			return v->kvm->arch.vpic->output;
	} else
		return 0;
}

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Eddie Dong
1
1.79%
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/*
 * check if there is injectable interrupt:
 * when virtual interrupt delivery enabled,
 * interrupt from apic will handled by hardware,
 * we don't need to check it here.
 */


int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v)
{
	if (!lapic_in_kernel(v))
		return v->arch.interrupt.pending;

	if (kvm_cpu_has_extint(v))
		return 1;

	if (kvm_vcpu_apicv_active(v))
		return 0;

	return kvm_apic_has_interrupt(v) != -1; /* LAPIC */
}

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12
21.05%
2
22.22%
Qing He
4
7.02%
1
11.11%
Andrey Smetanin
1
1.75%
1
11.11%
Paolo Bonzini
1
1.75%
1
11.11%
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57
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9
100.00%

/*
 * check if there is pending interrupt without
 * intack.
 */


int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
{
	if (!lapic_in_kernel(v))
		return v->arch.interrupt.pending;

	if (kvm_cpu_has_extint(v))
		return 1;

	return kvm_apic_has_interrupt(v) != -1;	/* LAPIC */
}
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7
14.89%
1
20.00%
Paolo Bonzini
1
2.13%
1
20.00%
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47
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5
100.00%


EXPORT_SYMBOL_GPL(kvm_cpu_has_interrupt);

/*
 * Read pending interrupt(from non-APIC source)
 * vector and intack.
 */


static int kvm_cpu_get_extint(struct kvm_vcpu *v)
{
	if (kvm_cpu_has_extint(v)) {
		if (irqchip_split(v->kvm)) {
			int vector = v->arch.pending_external_vector;

			v->arch.pending_external_vector = -1;
			return vector;
		} else
			return kvm_pic_read_irq(v->kvm); /* PIC */
	} else
		return -1;
}

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/*
 * Read pending interrupt vector and intack.
 */


int kvm_cpu_get_interrupt(struct kvm_vcpu *v)
{
	int vector;

	if (!lapic_in_kernel(v))
		return v->arch.interrupt.nr;

	vector = kvm_cpu_get_extint(v);

	if (vector != -1)
		return vector;			/* PIC */

	return kvm_get_apic_interrupt(v);	/* APIC */
}
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12
21.82%
1
14.29%
Qing He
3
5.45%
1
14.29%
Paolo Bonzini
1
1.82%
1
14.29%
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7
100.00%


EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);



void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
{
	if (lapic_in_kernel(vcpu))
		kvm_inject_apic_timer_irqs(vcpu);
}
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EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);



void __kvm_migrate_timers(struct kvm_vcpu *vcpu)
{
	__kvm_migrate_apic_timer(vcpu);
	__kvm_migrate_pit_timer(vcpu);
}
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1
4.55%
Eddie Dong
65
15.70%
3
13.64%
Gleb Natapov
52
12.56%
3
13.64%
Marcelo Tosatti
41
9.90%
2
9.09%
Paolo Bonzini
20
4.83%
2
9.09%
Qing He
7
1.69%
1
4.55%
Bandan Das
5
1.21%
1
4.55%
David Hildenbrand
4
0.97%
1
4.55%
Sheng Yang
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0.72%
1
4.55%
Xiantao Zhang
2
0.48%
1
4.55%
Avi Kivity
1
0.24%
1
4.55%
Jason (Hui) Wang
1
0.24%
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4.55%
Paul Gortmaker
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0.24%
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0.24%
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Directory: arch/x86/kvm

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