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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;