diff --git a/include/exec/memory.h b/include/exec/memory.h
index 6f8084f45e..afee185eae 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2052,7 +2052,7 @@ void address_space_remove_listeners(AddressSpace *as);
  * @is_write: indicates the transfer direction
  */
 MemTxResult address_space_rw(AddressSpace *as, hwaddr addr,
-                             MemTxAttrs attrs, uint8_t *buf,
+                             MemTxAttrs attrs, void *buf,
                              hwaddr len, bool is_write);
 
 /**
@@ -2070,7 +2070,7 @@ MemTxResult address_space_rw(AddressSpace *as, hwaddr addr,
  */
 MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
                                 MemTxAttrs attrs,
-                                const uint8_t *buf, hwaddr len);
+                                const void *buf, hwaddr len);
 
 /**
  * address_space_write_rom: write to address space, including ROM.
@@ -2096,7 +2096,7 @@ MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
  */
 MemTxResult address_space_write_rom(AddressSpace *as, hwaddr addr,
                                     MemTxAttrs attrs,
-                                    const uint8_t *buf, hwaddr len);
+                                    const void *buf, hwaddr len);
 
 /* address_space_ld*: load from an address space
  * address_space_st*: store to an address space
@@ -2334,7 +2334,7 @@ void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len,
 
 /* Internal functions, part of the implementation of address_space_read.  */
 MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
-                                    MemTxAttrs attrs, uint8_t *buf, hwaddr len);
+                                    MemTxAttrs attrs, void *buf, hwaddr len);
 MemTxResult flatview_read_continue(FlatView *fv, hwaddr addr,
                                    MemTxAttrs attrs, void *buf,
                                    hwaddr len, hwaddr addr1, hwaddr l,
@@ -2374,7 +2374,7 @@ static inline bool memory_access_is_direct(MemoryRegion *mr, bool is_write)
  */
 static inline __attribute__((__always_inline__))
 MemTxResult address_space_read(AddressSpace *as, hwaddr addr,
-                               MemTxAttrs attrs, uint8_t *buf,
+                               MemTxAttrs attrs, void *buf,
                                hwaddr len)
 {
     MemTxResult result = MEMTX_OK;
@@ -2433,7 +2433,7 @@ address_space_read_cached(MemoryRegionCache *cache, hwaddr addr,
  */
 static inline void
 address_space_write_cached(MemoryRegionCache *cache, hwaddr addr,
-                           void *buf, hwaddr len)
+                           const void *buf, hwaddr len)
 {
     assert(addr < cache->len && len <= cache->len - addr);
     if (likely(cache->ptr)) {
diff --git a/exec.c b/exec.c
index 980cc0e2b2..1a80159996 100644
--- a/exec.c
+++ b/exec.c
@@ -3271,7 +3271,7 @@ static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
 }
 
 MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
-                                    MemTxAttrs attrs, uint8_t *buf, hwaddr len)
+                                    MemTxAttrs attrs, void *buf, hwaddr len)
 {
     MemTxResult result = MEMTX_OK;
     FlatView *fv;
@@ -3287,7 +3287,7 @@ MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr,
 
 MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
                                 MemTxAttrs attrs,
-                                const uint8_t *buf, hwaddr len)
+                                const void *buf, hwaddr len)
 {
     MemTxResult result = MEMTX_OK;
     FlatView *fv;
@@ -3302,7 +3302,7 @@ MemTxResult address_space_write(AddressSpace *as, hwaddr addr,
 }
 
 MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs,
-                             uint8_t *buf, hwaddr len, bool is_write)
+                             void *buf, hwaddr len, bool is_write)
 {
     if (is_write) {
         return address_space_write(as, addr, attrs, buf, len);
@@ -3326,7 +3326,7 @@ enum write_rom_type {
 static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
                                                            hwaddr addr,
                                                            MemTxAttrs attrs,
-                                                           const uint8_t *buf,
+                                                           const void *ptr,
                                                            hwaddr len,
                                                            enum write_rom_type type)
 {
@@ -3334,6 +3334,7 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
     uint8_t *ram_ptr;
     hwaddr addr1;
     MemoryRegion *mr;
+    const uint8_t *buf = ptr;
 
     RCU_READ_LOCK_GUARD();
     while (len > 0) {
@@ -3366,7 +3367,7 @@ static inline MemTxResult address_space_write_rom_internal(AddressSpace *as,
 /* used for ROM loading : can write in RAM and ROM */
 MemTxResult address_space_write_rom(AddressSpace *as, hwaddr addr,
                                     MemTxAttrs attrs,
-                                    const uint8_t *buf, hwaddr len)
+                                    const void *buf, hwaddr len)
 {
     return address_space_write_rom_internal(as, addr, attrs,
                                             buf, len, WRITE_DATA);
