Added Shmbridgee Validation Test script and README

Introduced the Shmbridge Validation Test to verify QCOM_SCM support on target devices.

This commit includes:
- A shell script that checks kernel config and dmesg logs for QCOM_SCM presence and probe status.
- A README with usage instructions, prerequisites, and result criteria.

This enhances automated validation of Shmbridge functionality in the kernel test suite.

Signed-off-by: Sai-teja573 <122cs0573@nitrkl.ac.in>

Author: Sai-teja573

Runner/suites/Kernel/FunctionalArea/baseport/shmbridge/README.md

@@ -5,55 +5,55 @@ SPDX-License-Identifier: BSD-3-Clause-Clear
 
 ## Overview
 
-This test case validates the encryption and access functionality of the `shmbridge` partition by:
+This test case validates the presence and initialization of the Qualcomm Secure Channel Manager (QCOM_SCM) interface on the device. It ensures that:
 
-- Formatting the partition with ext4 and encryption options
-- Mounting it with `inlinecrypt`
-- Adding an encryption key using `fscryptctl`
-- Setting and verifying an encryption policy
-- Writing and reading a test file to confirm data integrity
+- The kernel is configured with QCOM_SCM support
+- The dmesg logs contain expected `qcom_scm` entries
+- There are no "probe failure" messages in the logs
 
 ## Usage
 
 Instructions:
 
-1. Copy repo to Target Device: Use scp to transfer the scripts from the host to the target device. The scripts should be copied to any directory on the target device.
-2. Verify Transfer: Ensure that the repo have been successfully copied to any directory on the target device.
-3. Run Scripts: Navigate to the directory where these files are copied on the target device and execute the scripts as needed.
+1. **Copy repo to Target Device**: Use `scp` to transfer the scripts from the host to the target device. The scripts should be copied to any directory on the target device.
+2. **Verify Transfer**: Ensure that the repo has been successfully copied to the target device.
+3. **Run Scripts**: Navigate to the directory where these files are copied on the target device and execute the scripts as needed.
 
-Run a Kernel Baseport shmbridge test using:
+Run the SHM Bridge test using:
 ---
 #### Quick Example
-```
+```sh
 git clone <this-repo>
 cd <this-repo>
 scp -r common Runner user@target_device_ip:<Path in device>
 ssh user@target_device_ip
 cd <Path in device>/Runner && ./run-test.sh shmbridge
 ```
-
+---
 ## Prerequisites
-- `fscryptctl`, `mkfs.ext4` and `mount` must be available
-- Root access is required
-- Partition /dev/disk/by-partlabel/xbl_ramdump_a must exist and be accessible
-
-## Result Format
-
-Test result will be saved in shmbridge.res as:  
-#### Pass Criteria
-- Partition is found and formatted
-- Encryption key is added and policy is set
-- Test file is written and read successfully
-- `Test Passed` – if all validations succeed
-<!-- -->
-#### Fail Criteria
-- Partition not found
-- Encryption setup fails
-- Test file cannot be read or content mismatch
-- `Test Failed` – if any check fails
-
+1. zcat, grep, and dmesg must be available.
+2. Root access may be required to write to read kernel logs.
+ ---
+ ## Result Format
+Test result will be saved in `shmbridge.res` as:  
 ## Output
 A .res file is generated in the same directory:
 
-`PASS shmbridge`  OR   `FAIL shmbridge`
+`shmbridge PASS`  OR   `shmbridge FAIL`
 
+## Sample Log
+```
+Output
+
+[INFO] 1970-01-01 00:09:09 - -----------------------------------------------------------------------------------------
+[INFO] 1970-01-01 00:09:09 - -------------------Starting shmbridge Testcase----------------------------
+[INFO] 1970-01-01 00:09:09 - === Test Initialization ===
+[INFO] 1970-01-01 00:09:09 - Checking if required tools are available
+[INFO] 1970-01-01 00:09:09 - Checking kernel config for QCOM_SCM support...
+[INFO] 1970-01-01 00:09:09 - Checking dmesg logs for qcom_scm entries...
+[INFO] 1970-01-01 00:09:09 - [    0.113484] qcom_scm: convention: smc arm 64
+[INFO] 1970-01-01 00:09:09 - [    0.113727] qcom_scm firmware:scm: qseecom: found qseecom with version 0x1402000
+[INFO] 1970-01-01 00:09:09 - [    0.113742] qcom_scm firmware:scm: qseecom: untested machine, skipping
+[PASS] 1970-01-01 00:09:09 - shmbridge : Test Passed (QCOM_SCM present and no probe failures)
+[INFO] 1970-01-01 00:09:09 - -------------------Completed shmbridge Testcase----------------------------
+```

Runner/suites/Kernel/FunctionalArea/baseport/shmbridge/run.sh

@@ -25,93 +25,47 @@ fi
 
 # shellcheck disable=SC1090,SC1091
 . "$TOOLS/functestlib.sh"
- 
+
 TESTNAME="shmbridge"
-test_path=$(find_test_case_by_name "$TESTNAME") || {
-    log_fail "$TESTNAME : Test directory not found."
-    echo "$TESTNAME FAIL" > "./$TESTNAME.res"
-    exit 1
-}
- 
+test_path=$(find_test_case_by_name "$TESTNAME")
 cd "$test_path" || exit 1
 res_file="./$TESTNAME.res"
-rm -f "$res_file"
- 
-log_info "--------------------------------------------------------------------------"
+
+log_info "-----------------------------------------------------------------------------------------"
 log_info "-------------------Starting $TESTNAME Testcase----------------------------"
- 
-check_dependencies fscryptctl mkfs.ext4 mount dd grep cat
- 
-MOUNT_POINT="/mnt/overlay"
-PARTITION="/dev/disk/by-partlabel/xbl_ramdump_a"
-KEY_FILE="$MOUNT_POINT/stdkey"
-TEST_DIR="$MOUNT_POINT/test"
-TEST_FILE="$TEST_DIR/txt"
- 
-log_info "Creating mount point at $MOUNT_POINT"
-mkdir -p "$MOUNT_POINT"
- 
-if [ ! -e "$PARTITION" ]; then
-    log_fail "Partition $PARTITION not found"
-    echo "$TESTNAME FAIL" > "$res_file"
-    exit 1
-fi
- 
-if ! mount | grep -q "$PARTITION"; then
-    log_info "Formatting $PARTITION with ext4 (encrypt, stable_inodes)"
-    mkfs.ext4 -F -O encrypt,stable_inodes "$PARTITION"
-else
-    log_warn "$PARTITION already mounted, skipping format"
+log_info "=== Test Initialization ==="
+
+log_info "Checking if required tools are available"
+check_dependencies zcat grep dmesg
+
+log_info "Checking kernel config for QCOM_SCM support..."
+if ! check_kernel_config "CONFIG_QCOM_SCM"; then
+    log_skip "$TESTNAME : CONFIG_QCOM_SCM not enabled, skipping test"
+    echo "$TESTNAME SKIP" > "$res_file"
+    exit 0
 fi
- 
-log_info "Mounting $PARTITION to $MOUNT_POINT with inlinecrypt"
-if ! mount "$PARTITION" -o inlinecrypt "$MOUNT_POINT"; then
-    log_fail "Failed to mount $PARTITION"
+
+log_info "Checking dmesg logs for qcom_scm entries..."
+dmesg_output=$(dmesg | grep qcom_scm)
+
+if [ -z "$dmesg_output" ]; then
+    log_fail "$TESTNAME : No qcom_scm entries found in dmesg"
     echo "$TESTNAME FAIL" > "$res_file"
     exit 1
 fi
- 
-log_info "Generating 64-byte encryption key"
-dd if=/dev/urandom bs=1 count=64 of="$KEY_FILE" status=none
- 
-log_info "Adding encryption key with fscryptctl"
-identifier=$(fscryptctl add_key "$MOUNT_POINT" < "$KEY_FILE") || {
-    log_fail "Failed to add key to $MOUNT_POINT"
-    echo "$TESTNAME FAIL" > "$res_file"
-    umount "$MOUNT_POINT"
-    exit 1
-}
- 
-mkdir -p "$TEST_DIR"
-log_info "Applying encryption policy to $TEST_DIR"
-fscryptctl set_policy --iv-ino-lblk-64 "$identifier" "$TEST_DIR" || {
-    log_fail "Failed to set policy on $TEST_DIR"
-    echo "$TESTNAME FAIL" > "$res_file"
-    umount "$MOUNT_POINT"
-    exit 1
-}
- 
-log_info "Verifying encryption policy"
-fscryptctl get_policy "$TEST_DIR"
- 
-log_info "Writing and reading test file"
-echo "hello" > "$TEST_FILE"
-sync
-echo 3 > /proc/sys/vm/drop_caches
- 
-if grep -q "hello" "$TEST_FILE"; then
-    log_pass "$TESTNAME : Test Passed"
-    echo "$TESTNAME PASS" > "$res_file"
-else
-    log_fail "$TESTNAME : Test Failed to verify data"
+
+echo "$dmesg_output" | while read -r line; do
+    log_info "$line"
+done
+
+if echo "$dmesg_output" | grep -qi "probe failure"; then
+    log_fail "$TESTNAME : Probe failure detected in dmesg logs"
     echo "$TESTNAME FAIL" > "$res_file"
-    umount "$MOUNT_POINT"
     exit 1
 fi
- 
-umount "$MOUNT_POINT"
-log_info "Unmounted $MOUNT_POINT and cleaned up."
- 
+
+log_pass "$TESTNAME : Test Passed (QCOM_SCM present and no probe failures)"
+echo "$TESTNAME PASS" > "$res_file"
+
 log_info "-------------------Completed $TESTNAME Testcase----------------------------"
 exit 0
-