/*
* This is a place holder to ensure that the _lnx_exts section gets created by gcc
*/
+
+
static struct {} null_ext __attribute__((__used__)) \
- __attribute__((unused, __section__ ("_lnx_exts"), \
- aligned(sizeof(void *))));
+ __attribute__((unused, __section__ ("_lnx_exts"), \
+ aligned(sizeof(void *))));
+
+struct vm_ext {
+ struct linux_ext * impl;
+ void * vm_data;
+ struct list_head node;
+};
+void * get_vm_ext_data(struct v3_guest * guest, char * ext_name) {
+ struct vm_ext * ext = NULL;
+
+ list_for_each_entry(ext, &(guest->exts), node) {
+ if (strncmp(ext->impl->name, ext_name, strlen(ext->impl->name)) == 0) {
+ return ext->vm_data;
+ }
+ }
+
+ return NULL;
+}
int init_vm_extensions(struct v3_guest * guest) {
- extern struct linux_ext * __start__lnx_exts;
- extern struct linux_ext * __stop__lnx_exts;
- struct linux_ext * tmp_ext = __start__lnx_exts;
+ extern struct linux_ext * __start__lnx_exts[];
+ extern struct linux_ext * __stop__lnx_exts[];
+ struct linux_ext * ext_impl = __start__lnx_exts[0];
int i = 0;
- while (tmp_ext != __stop__lnx_exts) {
- printk("Registering Linux Extension (%s)\n", tmp_ext->name);
- tmp_ext->init();
+ while (ext_impl != __stop__lnx_exts[0]) {
+ struct vm_ext * ext = NULL;
+
+ if (ext_impl->guest_init == NULL) {
+ // We can have global extensions without per guest state
+ ext_impl = __start__lnx_exts[++i];
+ continue;
+ }
+
+ printk("Registering Linux Extension (%s)\n", ext_impl->name);
+
+ ext = kmalloc(sizeof(struct vm_ext), GFP_KERNEL);
+
+ if (!ext) {
+ printk("Error allocating VM extension (%s)\n", ext_impl->name);
+ return -1;
+ }
+
+ ext->impl = ext_impl;
+
+ ext_impl->guest_init(guest, &(ext->vm_data));
- tmp_ext = &(__start__lnx_exts[++i]);
+ list_add(&(ext->node), &(guest->exts));
+
+ ext_impl = __start__lnx_exts[++i];
}
return 0;
+}
+
+
+
+int deinit_vm_extensions(struct v3_guest * guest) {
+ struct vm_ext * ext = NULL;
+ struct vm_ext * tmp = NULL;
+
+ list_for_each_entry_safe(ext, tmp, &(guest->exts), node) {
+ if (ext->impl->guest_deinit) {
+ ext->impl->guest_deinit(guest, ext->vm_data);
+ } else {
+ printk("WARNING: Extension %s, does not have a guest deinit function\n", ext->impl->name);
+ }
+ list_del(&(ext->node));
+ kfree(ext);
+ }
+
+ return 0;
}
int init_lnx_extensions( void ) {
- extern struct linux_ext * __start__lnx_exts;
- extern struct linux_ext * __stop__lnx_exts;
- struct linux_ext * tmp_ext = __start__lnx_exts;
+ extern struct linux_ext * __start__lnx_exts[];
+ extern struct linux_ext * __stop__lnx_exts[];
+ struct linux_ext * tmp_ext = __start__lnx_exts[0];
int i = 0;
- while (tmp_ext != __stop__lnx_exts) {
- printk("Registering Linux Extension (%s)\n", tmp_ext->name);
- tmp_ext->init();
+ while (tmp_ext != __stop__lnx_exts[0]) {
+
+ printk("tmp_ext=%p\n", tmp_ext);
+
+ if (tmp_ext->init != NULL) {
+ printk("Registering Linux Extension (%s)\n", tmp_ext->name);
+ tmp_ext->init();
+ }
- tmp_ext = &(__start__lnx_exts[++i]);
+ tmp_ext = __start__lnx_exts[++i];
}
return 0;
int deinit_lnx_extensions( void ) {
- extern struct linux_ext * __start__lnx_exts;
- extern struct linux_ext * __stop__lnx_exts;
- struct linux_ext * tmp_ext = __start__lnx_exts;
+ extern struct linux_ext * __start__lnx_exts[];
+ extern struct linux_ext * __stop__lnx_exts[];
+ struct linux_ext * tmp_ext = __start__lnx_exts[0];
int i = 0;
- while (tmp_ext != __stop__lnx_exts) {
+ while (tmp_ext != __stop__lnx_exts[0]) {
printk("Cleaning up Linux Extension (%s)\n", tmp_ext->name);
- tmp_ext->deinit();
+ if (tmp_ext->deinit != NULL) {
+ tmp_ext->deinit();
+ } else {
+ printk("WARNING: Extension %s does not have a global deinit function\n", tmp_ext->name);
+ }
- tmp_ext = &(__start__lnx_exts[++i]);
+ tmp_ext = __start__lnx_exts[++i];
}
return 0;