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authorAvi Kivity <avi@redhat.com>2010-08-30 12:18:24 +0300
committerAvi Kivity <avi@redhat.com>2010-10-24 10:51:54 +0200
commit9ed049c3b6230b68985da31f8243d4bec95e0b3a (patch)
treedd2eda8711ee3ae3ecee5cbb94e635e1fb78297a /arch/x86/kvm/i8259.c
parent7d9ddaedd8a9d0442fda5b5a90f22a33becbd235 (diff)
KVM: i8259: Make ICW1 conform to spec
ICW is not a full reset, instead it resets a limited number of registers in the PIC. Change ICW1 emulation to only reset those registers. Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r--arch/x86/kvm/i8259.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 4b7b73ce2098..6e77471951e8 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -308,13 +308,17 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
addr &= 1;
if (addr == 0) {
if (val & 0x10) {
- kvm_pic_reset(s); /* init */
- /*
- * deassert a pending interrupt
- */
- pic_irq_request(s->pics_state->kvm, 0);
- s->init_state = 1;
s->init4 = val & 1;
+ s->last_irr = 0;
+ s->imr = 0;
+ s->priority_add = 0;
+ s->special_mask = 0;
+ s->read_reg_select = 0;
+ if (!s->init4) {
+ s->special_fully_nested_mode = 0;
+ s->auto_eoi = 0;
+ }
+ s->init_state = 1;
if (val & 0x02)
printk(KERN_ERR "single mode not supported");
if (val & 0x08)