-/*H:220 Now we've got the routines to deliver interrupts, delivering traps
- * like page fault is easy. The only trick is that Intel decided that some
- * traps should have error codes: */
+/* The syscall vector it wants must be unused by Host. */
+bool check_syscall_vector(struct lguest *lg)
+{
+ u32 vector;
+
+ if (get_user(vector, &lg->lguest_data->syscall_vec))
+ return false;
+
+ return could_be_syscall(vector);
+}
+
+int init_interrupts(void)
+{
+ /* If they want some strange system call vector, reserve it now */
+ if (syscall_vector != SYSCALL_VECTOR
+ && test_and_set_bit(syscall_vector, used_vectors)) {
+ printk("lg: couldn't reserve syscall %u\n", syscall_vector);
+ return -EBUSY;
+ }
+ return 0;
+}
+
+void free_interrupts(void)
+{
+ if (syscall_vector != SYSCALL_VECTOR)
+ clear_bit(syscall_vector, used_vectors);
+}
+
+/*H:220 Now we've got the routines to deliver interrupts, delivering traps like
+ * page fault is easy. The only trick is that Intel decided that some traps
+ * should have error codes: */