diff mbox series

[v4,2/3] edu: mmio: allow 64-bit access in read dispatch

Message ID 20190510164349.81507-3-liq3ea@163.com (mailing list archive)
State New, archived
Headers show
Series hw: edu: some fixes | expand

Commit Message

Li Qiang May 10, 2019, 4:43 p.m. UTC 
The edu spec says when address >= 0x80, the MMIO area can
be accessed by 64-bit.

Signed-off-by: Li Qiang <liq3ea@163.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
---
 hw/misc/edu.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/hw/misc/edu.c b/hw/misc/edu.c
index 65fc32b928..33de05141f 100644
--- a/hw/misc/edu.c
+++ b/hw/misc/edu.c
@@ -185,7 +185,11 @@  static uint64_t edu_mmio_read(void *opaque, hwaddr addr, unsigned size)
     EduState *edu = opaque;
     uint64_t val = ~0ULL;
 
-    if (size != 4) {
+    if (addr < 0x80 && size != 4) {
+        return val;
+    }
+
+    if (addr >= 0x80 && size != 4 && size != 8) {
         return val;
     }