An example QEMU machine implemented in Rust. Requires applying the following changes to QEMU:
diff --git a/Makefile b/Makefile
index 930ac27..16612e8 100644
--- a/Makefile
+++ b/Makefile
@@ -228,6 +228,8 @@ libqemuutil.a: $(util-obj-y)
block-modules = $(foreach o,$(block-obj-m),"$(basename $(subst /,-,$o))",) NULL
util/module.o-cflags = -D'CONFIG_BLOCK_MODULES=$(block-modules)'
+util/module.o-cflags += -D'CONFIG_MACHINE_MODULES="machine-dummy", NULL'
+
######################################################################
qemu-img.o: qemu-img-cmds.h
diff --git a/util/module.c b/util/module.c
index 4bd4a94..69bc254 100644
--- a/util/module.c
+++ b/util/module.c
@@ -171,6 +171,9 @@ static void module_load(module_init_type type)
static const char *block_modules[] = {
CONFIG_BLOCK_MODULES
};
+ static const char *machine_modules[] = {
+ CONFIG_MACHINE_MODULES
+ };
char *exec_dir;
char *dirs[3];
int i = 0;
@@ -185,6 +188,9 @@ static void module_load(module_init_type type)
case MODULE_INIT_BLOCK:
mp = block_modules;
break;
+ case MODULE_INIT_MACHINE:
+ mp = machine_modules;
+ break;
default:
/* no other types have dynamic modules for now*/
return;Next, compile QEMU with module support:
./configure --enable-modules
Build this project:
cargo build
Finally, copy the shared object to the QEMU tree as "machine-dummy.so" (or whatever module name you specified on the Makefile). Note that the list of modules is static in QEMU and requires re-compilation in case of changes.
You may also need to change the qemu_stamp_<id>() function name to reflect
the stamp for your QEMU tree. This stamp can be found on the config-host.mak
file on the QEMU tree. Note that there is no ABI or API stability guarantee, so
this code may require changes for future QEMU versions.