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-rw-r--r--hw/nvram/mac_nvram.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/nvram/mac_nvram.c b/hw/nvram/mac_nvram.c
index bcff074d81..7656951e99 100644
--- a/hw/nvram/mac_nvram.c
+++ b/hw/nvram/mac_nvram.c
@@ -66,6 +66,10 @@ static uint64_t macio_nvram_readb(void *opaque, hwaddr addr,
 static const MemoryRegionOps macio_nvram_ops = {
     .read = macio_nvram_readb,
     .write = macio_nvram_writeb,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
+    .impl.min_access_size = 1,
+    .impl.max_access_size = 1,
     .endianness = DEVICE_BIG_ENDIAN,
 };