[Qemu-devel] [PATCH 2/2] ioapic: Reject non-dword accesses to IOWIN register

[Jan Kiszka <jan.kiszka@siemens.com>]

Aligns the model with the spec.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hw/ioapic.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/hw/ioapic.c b/hw/ioapic.c
index 56b1612..eb75766 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -208,6 +208,9 @@ ioapic_mem_read(void *opaque, target_phys_addr_t addr, unsigned int size)
         val = s->ioregsel;
         break;
     case IOAPIC_IOWIN:
+        if (size != 4) {
+            break;
+        }
         switch (s->ioregsel) {
         case IOAPIC_REG_ID:
             val = s->id << IOAPIC_ID_SHIFT;
@@ -247,6 +250,9 @@ ioapic_mem_write(void *opaque, target_phys_addr_t addr, uint64_t val,
         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:
-- 
1.7.3.4