The edu spec said when address >= 0x80, the MMIO area can
be accessed by 8 bytes.

Signed-off-by: Li Qiang <liq3ea@163.com>
---
Change since v1:
Fix format compile error on Windows

 hw/misc/edu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index 65fc32b928..4018dddcb8 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -189,6 +189,10 @@ static uint64_t edu_mmio_read(void *opaque, hwaddr addr, unsigned size)
         return val;
     }
 
+    if (addr >= 0x80 && size != 4 && size != 8) {
+        return val;
+    }
+
     switch (addr) {
     case 0x00:
         val = 0x010000edu;
-- 
2.17.1