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Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c48
1 files changed, 31 insertions, 17 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 93825ff..8d10c06 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -3,6 +3,7 @@
*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2007 Intel Corporation
+ * Copyright 2009 Red Hat, Inc. and/or its affilates.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -33,6 +34,8 @@
#include <linux/kvm_host.h>
#include "trace.h"
+static void pic_irq_request(struct kvm *kvm, int level);
+
static void pic_lock(struct kvm_pic *s)
__acquires(&s->lock)
{
@@ -43,16 +46,25 @@ static void pic_unlock(struct kvm_pic *s)
__releases(&s->lock)
{
bool wakeup = s->wakeup_needed;
- struct kvm_vcpu *vcpu;
+ struct kvm_vcpu *vcpu, *found = NULL;
+ int i;
s->wakeup_needed = false;
raw_spin_unlock(&s->lock);
if (wakeup) {
- vcpu = s->kvm->bsp_vcpu;
- if (vcpu)
- kvm_vcpu_kick(vcpu);
+ kvm_for_each_vcpu(i, vcpu, s->kvm) {
+ if (kvm_apic_accept_pic_intr(vcpu)) {
+ found = vcpu;
+ break;
+ }
+ }
+
+ if (!found)
+ found = s->kvm->bsp_vcpu;
+
+ kvm_vcpu_kick(found);
}
}
@@ -173,10 +185,7 @@ static void pic_update_irq(struct kvm_pic *s)
pic_set_irq1(&s->pics[0], 2, 0);
}
irq = pic_get_irq(&s->pics[0]);
- if (irq >= 0)
- s->irq_request(s->irq_request_opaque, 1);
- else
- s->irq_request(s->irq_request_opaque, 0);
+ pic_irq_request(s->kvm, irq >= 0);
}
void kvm_pic_update_irq(struct kvm_pic *s)
@@ -261,8 +270,7 @@ int kvm_pic_read_irq(struct kvm *kvm)
void kvm_pic_reset(struct kvm_kpic_state *s)
{
int irq;
- struct kvm *kvm = s->pics_state->irq_request_opaque;
- struct kvm_vcpu *vcpu0 = kvm->bsp_vcpu;
+ struct kvm_vcpu *vcpu0 = s->pics_state->kvm->bsp_vcpu;
u8 irr = s->irr, isr = s->imr;
s->last_irr = 0;
@@ -301,8 +309,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
/*
* deassert a pending interrupt
*/
- s->pics_state->irq_request(s->pics_state->
- irq_request_opaque, 0);
+ pic_irq_request(s->pics_state->kvm, 0);
s->init_state = 1;
s->init4 = val & 1;
if (val & 0x02)
@@ -356,10 +363,20 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
}
} else
switch (s->init_state) {
- case 0: /* normal mode */
+ case 0: { /* normal mode */
+ u8 imr_diff = s->imr ^ val,
+ off = (s == &s->pics_state->pics[0]) ? 0 : 8;
s->imr = val;
+ for (irq = 0; irq < PIC_NUM_PINS/2; irq++)
+ if (imr_diff & (1 << irq))
+ kvm_fire_mask_notifiers(
+ s->pics_state->kvm,
+ SELECT_PIC(irq + off),
+ irq + off,
+ !!(s->imr & (1 << irq)));
pic_update_irq(s->pics_state);
break;
+ }
case 1:
s->irq_base = val & 0xf8;
s->init_state = 2;
@@ -518,9 +535,8 @@ static int picdev_read(struct kvm_io_device *this,
/*
* callback when PIC0 irq status changed
*/
-static void pic_irq_request(void *opaque, int level)
+static void pic_irq_request(struct kvm *kvm, int level)
{
- struct kvm *kvm = opaque;
struct kvm_vcpu *vcpu = kvm->bsp_vcpu;
struct kvm_pic *s = pic_irqchip(kvm);
int irq = pic_get_irq(&s->pics[0]);
@@ -549,8 +565,6 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
s->kvm = kvm;
s->pics[0].elcr_mask = 0xf8;
s->pics[1].elcr_mask = 0xde;
- s->irq_request = pic_irq_request;
- s->irq_request_opaque = kvm;
s->pics[0].pics_state = s;
s->pics[1].pics_state = s;