bump MAX_DMA_REGIONS

Some perfectly reasonable VMs exceed 16 VMs; bump this up somewhat.

Signed-off-by: John Levon <[email protected]>

Author: jlevon

lib/private.h

@@ -50,7 +50,7 @@
 #else
 #define MAX_DMA_SIZE UINT32_MAX /* FIXME check for __i386__ etc? */
 #endif
-#define MAX_DMA_REGIONS 16
+#define MAX_DMA_REGIONS 64
 
 #define SERVER_MAX_DATA_XFER_SIZE (VFIO_USER_DEFAULT_MAX_DATA_XFER_SIZE)
 

test/py/libvfio_user.py

@@ -160,7 +160,7 @@ def is_32bit():
     return (1 << 31) - 1 == sys.maxsize
 
 
-MAX_DMA_REGIONS = 16
+MAX_DMA_REGIONS = 64
 # FIXME get from libvfio-user.h
 MAX_DMA_SIZE = sys.maxsize << 1 if is_32bit() else (8 * ONE_TB)