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| author | Avi Kivity <avi@redhat.com> | 2010-12-31 10:52:15 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-02 11:52:48 +0200 |
| commit | d0dfc6b74a0c6e9ee46b62713256e2b025244d3c (patch) | |
| tree | a065d54c18eaa687762e032dd46c28d4affff3b1 | |
| parent | 649497d1a3676020802ebba04a3d9bb31253adb5 (diff) | |
| download | lwn-d0dfc6b74a0c6e9ee46b62713256e2b025244d3c.tar.gz lwn-d0dfc6b74a0c6e9ee46b62713256e2b025244d3c.zip | |
KVM: i8259: initialize isr_ack
isr_ack is never initialized. So, until the first PIC reset, interrupts
may fail to be injected. This can cause Windows XP to fail to boot, as
reported in the fallout from the fix to
https://bugzilla.kernel.org/show_bug.cgi?id=21962.
Reported-and-tested-by: Nicolas Prochazka <prochazka.nicolas@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/i8259.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index f628234fbeca..3cece05e4ac4 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -575,6 +575,8 @@ struct kvm_pic *kvm_create_pic(struct kvm *kvm) s->pics[1].elcr_mask = 0xde; s->pics[0].pics_state = s; s->pics[1].pics_state = s; + s->pics[0].isr_ack = 0xff; + s->pics[1].isr_ack = 0xff; /* * Initialize PIO device |