feat: add support for secure interrupt handling and completion
As per FF-A v1.1 spec, the conduit used by SPM to signal an interrupt
to S-EL1 Partition is vIRQ and/or ERET.
Depending on the execution state of the vCPU of the target SP,
FFA_INTERRUPT ABI and/or Interrupt ID can be used as parameters during
eret to the SP.
This patch adds support for secure interrupt handling in Cactus SP as
well as adds support for FFA_INTERRUPT ABI in the message loop.
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I173b9e0af11b6fd2605145391da68dfda04a14f2
diff --git a/spm/cactus/cactus_main.c b/spm/cactus/cactus_main.c
index 78bb8fc..c80abd9 100644
--- a/spm/cactus/cactus_main.c
+++ b/spm/cactus/cactus_main.c
@@ -69,14 +69,26 @@
}
if (ffa_func_id(ffa_ret) != FFA_MSG_SEND_DIRECT_REQ_SMC32 &&
- ffa_func_id(ffa_ret) != FFA_MSG_SEND_DIRECT_REQ_SMC64) {
+ ffa_func_id(ffa_ret) != FFA_MSG_SEND_DIRECT_REQ_SMC64 &&
+ ffa_func_id(ffa_ret) != FFA_INTERRUPT) {
ERROR("%s(%u) unknown func id 0x%x\n",
__func__, vm_id, ffa_func_id(ffa_ret));
break;
}
- destination = ffa_dir_msg_dest(ffa_ret);
+ if (ffa_func_id(ffa_ret) == FFA_INTERRUPT) {
+ /*
+ * Received FFA_INTERRUPT in waiting state.
+ * The interrupt id is passed although this is just
+ * informational as we're running with virtual
+ * interrupts unmasked and the interrupt is processed
+ * by the interrupt handler.
+ */
+ ffa_ret = ffa_msg_wait();
+ continue;
+ }
+ destination = ffa_dir_msg_dest(ffa_ret);
if (destination != vm_id) {
ERROR("%s(%u) invalid vm id 0x%x\n",
__func__, vm_id, destination);