feat(tests): helper to check occurrence of exception
In some of the tests the primary VM looks for the occurrence of
exceptions in the service partition. This can be done in two different
ways, depending on the exception level of the service:
- EL1 keeps count of the number of exceptions it handled, and sends it
in a message to the Primary VM.
- EL0 is aborted, and the SPMC/Hyp returns execution to the primary VM
with FFA_ERROR and error code FFA_ABORTED.
The newly added helper function is to be used by the primary VM to
check for the occurrence of exceptions, and works for both cases.
Change-Id: I5db9da013f41bf52bb3f7d069b65283191921de7
Signed-off-by: J-Alves <joao.alves@arm.com>
diff --git a/test/vmapi/common/exception_handler.c b/test/vmapi/common/exception_handler.c
index 5c6f87b..0df0df9 100644
--- a/test/vmapi/common/exception_handler.c
+++ b/test/vmapi/common/exception_handler.c
@@ -55,20 +55,35 @@
struct ffa_value ret;
ffa_notifications_bitmap_t fwk_notif;
- /* Assert we received a message with the exception count. */
ret = ffa_notification_get(hf_vm_get_id(), 0,
FFA_NOTIFICATION_FLAG_BITMAP_HYP |
FFA_NOTIFICATION_FLAG_BITMAP_SPM);
fwk_notif = ffa_notification_get_from_framework(ret);
- ASSERT_TRUE(is_ffa_hyp_buffer_full_notification(fwk_notif) ||
- is_ffa_spm_buffer_full_notification(fwk_notif));
- EXPECT_EQ(exception_msg->header.size, sizeof(exception_count));
+ if (fwk_notif == 0U ||
+ exception_msg->header.size != sizeof(exception_count)) {
+ return 0;
+ }
+
EXPECT_EQ(ffa_rx_release().func, FFA_SUCCESS_32);
return exception_count;
}
+/*
+ * Returns true if the receiver has been preempted by an exception:
+ * - if the receiver is an EL1 partition, it should have sent the exception
+ * count in a message.
+ * - if the receiver is an EL0 partition, the Hyp/SPMC should return FFA_ERROR
+ * with error code FFA_ABORTED.
+ */
+bool exception_received(struct ffa_value *run_res, const void *recv_buf)
+{
+ return exception_handler_receive_exception_count(recv_buf) == 1 ||
+ (run_res->func == FFA_ERROR_32 &&
+ ffa_error_code(*run_res) == FFA_ABORTED);
+}
+
/**
* EL1 exception handler to use in unit test VMs.
* Skips the instruction that triggered the exception.