[Qemu-devel] [RFC 3/3] exec: Allow to change Address Space from board level

[<marcin.krzeminski@nokia.com>]

From: Marcin Krzeminski <marcin.krzeminski@nokia.com>

By introduction of CPUAddressSpace table it is not possible
to change address space for CPU from board code. In my case
Cortex-M3 core has it own address space that is created at board
level, then updated by changing cpu->as. For current code cpu->as
is used only at init, so changing it does not change actual
address space.

Signed-off-by: Marcin Krzeminski <marcin.krzeminski@nokia.com>
---
 exec.c            | 8 ++++++++
 include/qom/cpu.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/exec.c b/exec.c
index 08c558e..9c6e302 100644
--- a/exec.c
+++ b/exec.c
@@ -628,6 +628,14 @@ AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx)
     /* Return the AddressSpace corresponding to the specified index */
     return cpu->cpu_ases[asidx].as;
 }
+
+void cpu_set_address_space(CPUState *cpu, AddressSpace *as, int asidx)
+{
+    /* Return the AddressSpace corresponding to the specified index */
+    if (asidx < cpu->num_ases) {
+        cpu->cpu_ases[asidx].as = as;
+    }
+}
 #endif
 
 void cpu_exec_unrealizefn(CPUState *cpu)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 3f79a8e..7e2ead8 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -964,6 +964,7 @@ void cpu_watchpoint_remove_all(CPUState *cpu, int mask);
  * specifies which address space to read.
  */
 AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx);
+void cpu_set_address_space(CPUState *cpu, AddressSpace *as, int asidx);
 
 void QEMU_NORETURN cpu_abort(CPUState *cpu, const char *fmt, ...)
     GCC_FMT_ATTR(2, 3);
-- 
2.7.4