commit 1a440963b9b3d76f0a9ba8d5cf7c9cdfa7a1ef06
author Jan Kiszka <jan.kiszka@siemens.com> Mon Oct 17 13:11:29 2011 +0200
committer Avi Kivity <avi@redhat.com> Thu Nov 24 18:31:56 2011 +0200
tree 734f0af48bd418c44d9640926c2532c2422ffb88
parent cfee758cc768ba29ab5e8c4a68b4433df4422cc9

ioapic: Reject non-dword accesses to IOWIN register

Aligns the model with the spec.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

hw/ioapic.c

diff --git a/hw/ioapic.c b/hw/ioapic.c
index 61991d7..347536e 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -206,6 +206,9 @@
         val = s->ioregsel;
         break;
     case IOAPIC_IOWIN:
+        if (size != 4) {
+            break;
+        }
         switch (s->ioregsel) {
         case IOAPIC_REG_ID:
             val = s->id << IOAPIC_ID_SHIFT;
@@ -244,6 +247,9 @@
         s->ioregsel = val;
         break;
     case IOAPIC_IOWIN:
+        if (size != 4) {
+            break;
+        }
         DPRINTF("write: %08x = %08x\n", s->ioregsel, val);
         switch (s->ioregsel) {
         case IOAPIC_REG_ID: