From 9195c4da26bbf8860e2e7b648dbf4ab465c7933a Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Thu, 15 Jul 2010 12:24:37 +0300 Subject: 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 Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/i8259.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'arch/x86/kvm') 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; -- cgit v1.2.3