From 6feaadf8855f395e080266552c4845dc47869293 Mon Sep 17 00:00:00 2001 From: Gleb Natapov Date: Tue, 24 Jan 2012 15:06:05 +0200 Subject: [PATCH] KVM: x86: reset edge sense circuit of i8259 on init The spec says that during initialization "The edge sense circuit is reset which means that following initialization an interrupt request (IR) input must make a low-to-high transition to generate an interrupt", but currently if edge triggered interrupt is in IRR it is delivered after i8259 initialization. Signed-off-by: Gleb Natapov Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- arch/x86/kvm/i8259.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index b6a73537e1efd..81cf4fa4a2bea 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -307,6 +307,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val) if (val & 0x10) { s->init4 = val & 1; s->last_irr = 0; + s->irr &= s->elcr; s->imr = 0; s->priority_add = 0; s->special_mask = 0; -- 2.39.5