From: Peter Crosthwaite <peter.crosthwa...@xilinx.com>
Add a MemoryRegion property, which if set is used to construct
the CPU's initial (default) AddressSpace.
Signed-off-by: Peter Crosthwaite <peter.crosthwa...@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.mayd...@linaro.org>
Acked-by: Edgar E. Iglesias <edgar.igles...@xilinx.com>
---
cpus.c | 4 +++-
exec.c | 14 ++++++++++++++
include/qom/cpu.h | 1 +
3 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/cpus.c b/cpus.c
index 725a51d..3efff6b 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()) {
diff --git a/exec.c b/exec.c
index 0e4f681..5a1b208 100644
--- a/exec.c
+++ b/exec.c
@@ -628,6 +628,20 @@ void cpu_exec_init(CPUState *cpu, Error **errp)
#ifndef CONFIG_USER_ONLY
cpu->thread_id = qemu_get_thread_id();
+
+ /* This is a softmmu CPU object, so create a property for it
+ * so users can wire up its memory. (This can't go in qom/cpu.c
+ * because that file is compiled only once for both user-mode
+ * and system builds.) The default if no link is set up is to use
+ * the system address space.
+ */
+ object_property_add_link(OBJECT(cpu), "memory", TYPE_MEMORY_REGION,
+ (Object **)&cpu->memory,
+ qdev_prop_allow_set_link_before_realize,
+ OBJ_PROP_LINK_UNREF_ON_RELEASE,
+ &error_abort);
+ cpu->memory = system_memory;
+ object_ref(OBJECT(cpu->memory));
#endif
#if defined(CONFIG_USER_ONLY)
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index ed23246..2e5229d 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -297,6 +297,7 @@ struct CPUState {
CPUAddressSpace *cpu_ases;
int num_ases;
AddressSpace *as;
+ MemoryRegion *memory;
void *env_ptr; /* CPUArchState */
struct TranslationBlock *current_tb;
--
1.9.1
