Commit 9b8c6924 authored by Jan Kiszka's avatar Jan Kiszka Committed by Paolo Bonzini

memory: Return -1 again on reads from unsigned regions

This restore the behavior prior to b018ddf6 which accidentally changed
the return code to 0. Specifically guests probing for register existence
were affected by this.
Signed-off-by: default avatarJan Kiszka <>
Signed-off-by: default avatarPaolo Bonzini <>
parent b4afea11
......@@ -840,7 +840,7 @@ static uint64_t unassigned_mem_read(void *opaque, hwaddr addr,
if (current_cpu != NULL) {
cpu_unassigned_access(current_cpu, addr, false, false, 0, size);
return 0;
return -1ULL;
static void unassigned_mem_write(void *opaque, hwaddr addr,
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