[RFC PATCH 6/6] memory: Use CPU register size as default access_size_max

[Philippe Mathieu-Daudé]

Do not restrict 64-bit CPU to 32-bit max access by default.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
RFC because this probably require an audit of all devices
used on 64-bit targets.
But if we find such problematic devices, they should instead
enforce their access_size_max = 4 rather than expecting the
default value to be valid...
---
 memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/memory.c b/memory.c
index fd6f3d6aca..1d6bb5cdb0 100644
--- a/memory.c
+++ b/memory.c
@@ -1370,7 +1370,7 @@ bool memory_region_access_valid(MemoryRegion *mr,
 
     access_size_max = mr->ops->valid.max_access_size;
     if (!mr->ops->valid.max_access_size) {
-        access_size_max = 4;
+        access_size_max = TARGET_LONG_SIZE;
     }
 
     access_size = MAX(MIN(size, access_size_max), access_size_min);
-- 
2.21.3