hw/isa/piix3: Add size constraints to rcr_ops

According to the PIIX3 datasheet, the reset control register is one byte in size.
Moreover, PIIX4 has it, so add it to PIIX3 as well.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20221022150508.26830-5-shentey@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>

diff --git a/hw/isa/piix3.c b/hw/isa/piix3.c
index 04895ce..72dbf68 100644 (file)
--- a/hw/isa/piix3.c
+++ b/hw/isa/piix3.c
@@ -290,7 +290,11 @@ static uint64_t rcr_read(void *opaque, hwaddr addr, unsigned len)
 static const MemoryRegionOps rcr_ops = {
     .read = rcr_read,
     .write = rcr_write,
-    .endianness = DEVICE_LITTLE_ENDIAN
+    .endianness = DEVICE_LITTLE_ENDIAN,
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 1,
+    },
 };
 
 static void pci_piix3_realize(PCIDevice *dev, Error **errp)