memory: add return value to address_space_rw/read/write

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 81e0e416a4..d53a6a1b88 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -825,32 +825,38 @@ void address_space_destroy(AddressSpace *as);
 /**
  * address_space_rw: read from or write to an address space.
  *
+ * Return true if the operation hit any unassigned memory.
+ *
  * @as: #AddressSpace to be accessed
  * @addr: address within that address space
  * @buf: buffer with the data transferred
  * @is_write: indicates the transfer direction
  */
-void address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
+bool address_space_rw(AddressSpace *as, hwaddr addr, uint8_t *buf,
                       int len, bool is_write);
 
 /**
  * address_space_write: write to address space.
  *
+ * Return true if the operation hit any unassigned memory.
+ *
  * @as: #AddressSpace to be accessed
  * @addr: address within that address space
  * @buf: buffer with the data transferred
  */
-void address_space_write(AddressSpace *as, hwaddr addr,
+bool address_space_write(AddressSpace *as, hwaddr addr,
                          const uint8_t *buf, int len);
 
 /**
  * address_space_read: read from an address space.
  *
+ * Return true if the operation hit any unassigned memory.
+ *
  * @as: #AddressSpace to be accessed
  * @addr: address within that address space
  * @buf: buffer with the data transferred
  */
-void address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len);
+bool address_space_read(AddressSpace *as, hwaddr addr, uint8_t *buf, int len);
 
 /* address_space_translate: translate an address range into an address space
  * into a MemoryRegionSection and an address range into that section