hw/virtio: Access MemoryRegion with MemOp

The memory_region_dispatch_{read|write} operand "unsigned size" is
being converted into a "MemOp op".

Convert interfaces by using no-op size_memop.

After all interfaces are converted, size_memop will be implemented
and the memory_region_dispatch_{read|write} operand "unsigned size"
will be converted into a "MemOp op".

As size_memop is a no-op, this patch does not change any behaviour.

Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <ebf1f78029d5ac1de1739a11d679740a87a1f02f.1566466906.git.tony.nguyen@bt.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 8babd92e59..82c5e87a44 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -17,6 +17,7 @@
 
 #include "qemu/osdep.h"
 
+#include "exec/memop.h"
 #include "standard-headers/linux/virtio_pci.h"
 #include "hw/virtio/virtio.h"
 #include "migration/qemu-file-types.h"
@@ -552,7 +553,8 @@ void virtio_address_space_write(VirtIOPCIProxy *proxy, hwaddr addr,
         /* As length is under guest control, handle illegal values. */
         return;
     }
-    memory_region_dispatch_write(mr, addr, val, len, MEMTXATTRS_UNSPECIFIED);
+    memory_region_dispatch_write(mr, addr, val, size_memop(len),
+                                 MEMTXATTRS_UNSPECIFIED);
 }
 
 static void
@@ -575,7 +577,8 @@ virtio_address_space_read(VirtIOPCIProxy *proxy, hwaddr addr,
     /* Make sure caller aligned buf properly */
     assert(!(((uintptr_t)buf) & (len - 1)));
 
-    memory_region_dispatch_read(mr, addr, &val, len, MEMTXATTRS_UNSPECIFIED);
+    memory_region_dispatch_read(mr, addr, &val, size_memop(len),
+                                MEMTXATTRS_UNSPECIFIED);
     switch (len) {
     case 1:
         pci_set_byte(buf, val);