feat: vm helpers to modify interrupt descriptors
These helper utilities are necessary in the subsequent patches where
the interrupt descriptor of an VM is updated in runtime.
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I591f1860c0bcc6f205567ce41cda0dbfd17e6e04
diff --git a/src/vm.c b/src/vm.c
index 838b134..1b7ae9d 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -983,3 +983,61 @@
vm->boot_info.gp_register_num);
}
}
+
+/**
+ * Obtain the interrupt descriptor entry of the specified vm corresponding
+ * to the specific interrupt id.
+ */
+struct interrupt_descriptor *vm_find_interrupt_descriptor(
+ struct vm_locked vm_locked, uint32_t id)
+{
+ for (uint32_t i = 0; i < HF_NUM_INTIDS; i++) {
+ /* Interrupt descriptors are populated contiguously. */
+ if (!vm_locked.vm->interrupt_desc[i].valid) {
+ break;
+ }
+
+ if (vm_locked.vm->interrupt_desc[i].interrupt_id == id) {
+ /* Interrupt descriptor found. */
+ return &vm_locked.vm->interrupt_desc[i];
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * Update the target MPIDR corresponding to the specified interrupt id
+ * belonging to the specified vm.
+ */
+struct interrupt_descriptor *vm_interrupt_set_target_mpidr(
+ struct vm_locked vm_locked, uint32_t id, uint32_t target_mpidr)
+{
+ struct interrupt_descriptor *int_desc;
+
+ int_desc = vm_find_interrupt_descriptor(vm_locked, id);
+
+ if (int_desc != NULL) {
+ interrupt_desc_set_mpidr(int_desc, target_mpidr);
+ }
+
+ return int_desc;
+}
+
+/**
+ * Update the security state of the specified interrupt id belonging to the
+ * specified vm.
+ */
+struct interrupt_descriptor *vm_interrupt_set_sec_state(
+ struct vm_locked vm_locked, uint32_t id, uint32_t sec_state)
+{
+ struct interrupt_descriptor *int_desc;
+
+ int_desc = vm_find_interrupt_descriptor(vm_locked, id);
+
+ if (int_desc != NULL) {
+ interrupt_desc_set_sec_state(int_desc, sec_state);
+ }
+
+ return int_desc;
+}