qom/cpu: Add MemoryRegion property

Add a MemoryRegion property, which if set is used to construct
the CPU's initial (default) AddressSpace.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
[PMM: code is moved from qom/cpu.c to exec.c to avoid having to
 make qom/cpu.o be a non-common object file; code to use the
 MemoryRegion and to default it to system_memory added.]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/cpus.c b/cpus.c
index 725a51dac9..3efff6b109 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1375,8 +1375,10 @@ void qemu_init_vcpu(CPUState *cpu)
         /* If the target cpu hasn't set up any address spaces itself,
          * give it the default one.
          */
+        AddressSpace *as = address_space_init_shareable(cpu->memory,
+                                                        "cpu-memory");
         cpu->num_ases = 1;
-        cpu_address_space_init(cpu, &address_space_memory, 0);
+        cpu_address_space_init(cpu, as, 0);
     }
 
     if (kvm_enabled()) {