Add new basic remoteproc test that check start/stop
sequence of all subsystems available.

diff --git a/MAINTAINERS b/MAINTAINERS
index e062b5328341..aff76edc4242 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18225,6 +18225,7 @@ F:      Documentation/staging/remoteproc.rst
 F:     drivers/remoteproc/
 F:     include/linux/remoteproc.h
 F:     include/linux/remoteproc/
+F:     tools/testing/selftests/remoteproc/

 REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
 M:     Bjorn Andersson <anders...@kernel.org>
diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 697f13bbbc32..31db0311efdc 100644
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -68,6 +68,7 @@ TARGETS += proc
 TARGETS += pstore
 TARGETS += ptrace
 TARGETS += openat2
+TARGETS += remoteproc
 TARGETS += resctrl
 TARGETS += riscv
 TARGETS += rlimits
diff --git a/tools/testing/selftests/remoteproc/Makefile 
b/tools/testing/selftests/remoteproc/Makefile
new file mode 100644
index 000000000000..a84b3934fd36
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+TEST_PROGS := remoteproc_test.sh
+
+include ../lib.mk
diff --git a/tools/testing/selftests/remoteproc/config 
b/tools/testing/selftests/remoteproc/config
new file mode 100644
index 000000000000..a5c237d2f3b4
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/config
@@ -0,0 +1 @@
+CONFIG_REMOTEPROC=y
diff --git a/tools/testing/selftests/remoteproc/remoteproc_test.sh 
b/tools/testing/selftests/remoteproc/remoteproc_test.sh
new file mode 100644
index 000000000000..88c8f15d8406
--- /dev/null
+++ b/tools/testing/selftests/remoteproc/remoteproc_test.sh
@@ -0,0 +1,165 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
+#
+
+DIR="$(dirname $(readlink -f "$0"))"
+
+KTAP_HELPERS="${DIR}/../kselftest/ktap_helpers.sh"
+if [ -e "$KTAP_HELPERS" ]; then
+    source "$KTAP_HELPERS"
+else
+    echo -n "1..0 # SKIP $KTAP_HELPERS file not found"
+       exit 4
+fi
+
+RPROC_SYS=/sys/class/remoteproc
+RPROC_SEQ_SLEEP=5
+rproc_ss_files=
+num_tests=0
+test_err=0
+
+check_error() {
+       if [ $? -ne 0 ]; then
+               test_err=$((test_err+1))
+               ktap_print_msg "$@"
+       fi
+}
+
+rproc_seq_test_ss_one() {
+       ss=$1
+       rproc=${RPROC_SYS}/$ss
+       rproc_name=$(cat $rproc/name)
+       rproc_state=$(cat $rproc/state)
+       rproc_ssr=$(cat $rproc/recovery)
+       ktap_print_msg "Testing rproc sequence for $rproc_name"
+
+       # Reset test_err value
+       test_err=0
+       if [ "$rproc_ssr" != "enabled" ]; then
+               echo enabled > $rproc/recovery
+               check_error "$rproc_name SSR-enabled failed"
+       fi
+
+       if [ "$rproc_state" != "running" ]; then
+               echo start > "$rproc/state"
+               check_error "$rproc_name state-start failed"
+
+               sleep ${RPROC_SEQ_SLEEP}
+
+               echo stop > "$rproc/state"
+               check_error "$rproc_name state-stop failed"
+       else
+               echo stop > "$rproc/state"
+               check_error "$rproc_name state-stop failed"
+
+               sleep ${RPROC_SEQ_SLEEP}
+
+               echo start > "$rproc/state"
+               check_error "$rproc_name state-start failed"
+       fi
+
+       if [ $test_err -ne 0 ]; then
+               ktap_test_fail "$rproc_name"
+       else
+               ktap_test_pass "$rproc_name"
+       fi
+}
+
+rproc_seq_test_all_ss() {
+       # Declare an array to save initial states of each ss
+       org_ss_to_state=""
+
+       # Reset test_err value
+       test_err=0
+
+       for ss in ${rproc_ss_files}; do
+               rproc=${RPROC_SYS}/$ss
+               rproc_name=$(cat $rproc/name)
+               rproc_ssr=$(cat $rproc/recovery)
+
+               # Enable SSR-recovery support
+               if [ "$rproc_ssr" != "enabled" ]; then
+                       echo enabled > $rproc/recovery
+                       check_error "$rproc_name SSR-enabled failed"
+               fi
+       done
+
+       for ss in ${rproc_ss_files}; do
+               rproc=${RPROC_SYS}/$ss
+               rproc_name=$(cat $rproc/name)
+               rproc_state=$(cat $rproc/state)
+
+               # Save initial states for each ss
+               org_ss_to_state="$org_ss_to_state $rproc_state"
+
+               # Initiate start/stop sequence
+               if [ "$rproc_state" != "running" ]; then
+                       echo start > "$rproc/state"
+                       check_error "$rproc_name state-start failed"
+               else
+                       echo stop > "$rproc/state"
+                       check_error "$rproc_name state-stop failed"
+               fi
+               sleep ${RPROC_SEQ_SLEEP}
+       done
+
+       index=1
+       for ss in ${rproc_ss_files}; do
+               rproc=${RPROC_SYS}/$ss
+               rproc_name=$(cat $rproc/name)
+               rproc_state=$(cat $rproc/state)
+
+               ss_state=$(echo $org_ss_to_state | cut -d' ' -f$index)
+               # Terminate start/stop sequence
+               if [ "$ss_state" != "running" ]; then
+                       echo stop > "$rproc/state"
+                       check_error "$rproc_name state-stop failed"
+               else
+                       echo start > "$rproc/state"
+                       check_error "$rproc_name state-start failed"
+               fi
+               index=$((index+1))
+               sleep ${RPROC_SEQ_SLEEP}
+       done
+
+       if [ $test_err -ne 0 ]; then
+               ktap_test_fail "for any of $rproc_ss_files"
+       else
+               ktap_test_pass "for all $rproc_ss_files"
+       fi
+}
+
+ktap_print_header
+
+if [[ ! -d "${RPROC_SYS}" ]]; then
+       ktap_skip_all "${RPROC_SYS} doesn't exist."
+       exit "${KSFT_SKIP}"
+fi
+
+rproc_ss_files=$(find ${RPROC_SYS}/remoteproc* -maxdepth 1 -exec basename {} 
\;)
+num_tests=$(echo ${rproc_ss_files} | wc -w)
+if [[ "${num_tests}" -eq 0 ]]; then
+       ktap_skip_all "${RPROC_SYS}/remoteproc* doesn't exist."
+       exit "${KSFT_SKIP}"
+fi
+
+# Total tests will be:
+# 1) Seq tests for each subsystem sequencially
+# 2) Seq tests for all subsystems concurrently
+num_tests=$((num_tests+1))
+
+ktap_set_plan "${num_tests}"
+
+# Test 1
+ktap_print_msg "Testing rproc up/down sequence for each subsystem sequencially"
+for ss in ${rproc_ss_files}; do
+       rproc_seq_test_ss_one $ss
+done
+
+# Test 2
+ktap_print_msg "Testing rproc up/down sequence for all subsystems concurrently"
+rproc_seq_test_all_ss
+
+ktap_finished
--
2.46.1


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