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Koen Kooi
33 lines
1.0 KiB
Diff
33 lines
1.0 KiB
Diff
From 1e144569ab9d311fa5e08efc9a7fb35853d697d9 Mon Sep 17 00:00:00 2001
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From: Avi Kivity <avi@redhat.com>
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Date: Fri, 31 Dec 2010 10:52:15 +0200
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Subject: [PATCH 44/65] KVM: i8259: initialize isr_ack
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isr_ack is never initialized. So, until the first PIC reset, interrupts
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may fail to be injected. This can cause Windows XP to fail to boot, as
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reported in the fallout from the fix to
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https://bugzilla.kernel.org/show_bug.cgi?id=21962.
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Reported-and-tested-by: Nicolas Prochazka <prochazka.nicolas@gmail.com>
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Signed-off-by: Avi Kivity <avi@redhat.com>
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---
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arch/x86/kvm/i8259.c | 2 ++
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1 files changed, 2 insertions(+), 0 deletions(-)
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diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
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index f628234..3cece05 100644
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--- a/arch/x86/kvm/i8259.c
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+++ b/arch/x86/kvm/i8259.c
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@@ -575,6 +575,8 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm)
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s->pics[1].elcr_mask = 0xde;
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s->pics[0].pics_state = s;
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s->pics[1].pics_state = s;
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+ s->pics[0].isr_ack = 0xff;
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+ s->pics[1].isr_ack = 0xff;
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/*
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* Initialize PIO device
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--
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1.6.6.1
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