sys/linux: documented the findings on qrtr rpmsg and mhi drivers

The QRTR rpmsg and mhi interfaces are not tested at this time.
The reasoning is documented for future reference in the corresponding
descriptions file.

1 files changed, 19 insertions, 0 deletions

diff --git a/sys/linux/socket_qipcrtr.txt b/sys/linux/socket_qipcrtr.txt
index 504739071..058eea5a6 100644
--- a/sys/linux/socket_qipcrtr.txt
+++ b/sys/linux/socket_qipcrtr.txt
@@ -1,6 +1,25 @@
 # Copyright 2020 syzkaller project authors. All rights reserved.
 # Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
 
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+
+# Findings on qrtr rpmsg and mhi interface (with drivers implemented in 'smd.c' and 'mhi.c' under '$KERNEL_SRC/net/qrtr/')
+# The investigation is done using Linux 5.8-rc1 with following configs set:
+#   - CONFIG_QRTR, CONFIG_QRTR_SMD, CONFIG_QRTR_TUN, CONFIG_QRTR_MHI, CONFIG_RPMSG,
+#     CONFIG_RPMSG_CHAR, CONFIG_RPMSG_QCOM_GLINK_NATIVE, CONFIG_RPMSG_QCOM_GLINK_RPM,
+#     CONFIG_RPMSG_VIRTIO
+# No additional device file was found in running kernel under '/dev/', and no device
+# was found under '/sys/bus/rpmsg/devices/'.
+# All examples found involve additional hardware assumptions.
+# The conclusion is that the testing of those subsystems relies on some hardware,
+# hence, not tested at this time.
+
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
+
 include <linux/socket.h>
 include <linux/net.h>
 include <linux/termios.h>