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authorGleb Natapov <gleb@redhat.com>2010-07-15 11:24:37 +0200
committerAvi Kivity <avi@redhat.com>2010-08-02 05:40:52 +0200
commit9195c4da26bbf8860e2e7b648dbf4ab465c7933a (patch)
treeba35ca2f03d5fd7bdfc776e608d6ed215b14ce06 /arch/x86/kvm/i8259.c
parentKVM: x86: never re-execute instruction with enabled tdp (diff)
downloadlinux-9195c4da26bbf8860e2e7b648dbf4ab465c7933a.tar.xz
linux-9195c4da26bbf8860e2e7b648dbf4ab465c7933a.zip
KVM: x86: Call mask notifiers from pic
If pit delivers interrupt while pic is masking it OS will never do EOI and ack notifier will not be called so when pit will be unmasked no pit interrupts will be delivered any more. Calling mask notifiers solves this issue. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 819b748a33f9..8d10c063d7f2 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -363,10 +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;