[PATCH v2 17/18] modules: check arch and block load on mismatch

[Gerd Hoffmann <kraxel@redhat.com>]

Add module_allow_arch() to set the target architecture.
In case a module is limited to some arch verify arches
match and ignore the module if not.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/qemu/module.h |  1 +
 softmmu/vl.c          |  3 +++
 util/module.c         | 15 +++++++++++++++
 3 files changed, 19 insertions(+)

diff --git a/include/qemu/module.h b/include/qemu/module.h
index d3cab3c25a2f..7825f6d8c847 100644
--- a/include/qemu/module.h
+++ b/include/qemu/module.h
@@ -72,6 +72,7 @@ void module_call_init(module_init_type type);
 bool module_load_one(const char *prefix, const char *lib_name, bool mayfail);
 void module_load_qom_one(const char *type);
 void module_load_qom_all(void);
+void module_allow_arch(const char *arch);
 
 /*
  * macros to store module metadata in a .modinfo section.
diff --git a/softmmu/vl.c b/softmmu/vl.c
index ba26a042b284..96316774fcc9 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -126,6 +126,8 @@
 #include "sysemu/iothread.h"
 #include "qemu/guest-random.h"
 
+#include "config-host.h"
+
 #define MAX_VIRTIO_CONSOLES 1
 
 typedef struct BlockdevOptionsQueueEntry {
@@ -2723,6 +2725,7 @@ void qemu_init(int argc, char **argv, char **envp)
     error_init(argv[0]);
     qemu_init_exec_dir(argv[0]);
 
+    module_allow_arch(TARGET_NAME);
     qemu_init_subsystems();
 
     /* first pass of option parsing */
diff --git a/util/module.c b/util/module.c
index 6e4199169c41..564b8e3da760 100644
--- a/util/module.c
+++ b/util/module.c
@@ -122,6 +122,12 @@ void module_call_init(module_init_type type)
 static Modules *modinfo;
 static char *module_dirs[5];
 static int module_ndirs;
+static const char *module_arch;
+
+void module_allow_arch(const char *arch)
+{
+    module_arch = arch;
+}
 
 static void module_load_path_init(void)
 {
@@ -295,6 +301,14 @@ bool module_load_one(const char *prefix, const char *lib_name, bool mayfail)
     module_load_modinfo();
 
     for (modlist = modinfo->list; modlist != NULL; modlist = modlist->next) {
+        if (modlist->value->has_arch) {
+            if (strcmp(modlist->value->name, module_name) == 0) {
+                if (!module_arch ||
+                    strcmp(modlist->value->arch, module_arch) != 0) {
+                    return false;
+                }
+            }
+        }
         if (modlist->value->has_deps) {
             if (strcmp(modlist->value->name, module_name) == 0) {
                 /* we depend on other module(s) */
@@ -401,6 +415,7 @@ void qemu_load_module_for_opts(const char *group)
 
 #else
 
+void module_allow_arch(const char *arch) {}
 void qemu_load_module_for_opts(const char *group) {}
 void module_load_qom_one(const char *type) {}
 void module_load_qom_all(void) {}
-- 
2.31.1