adding/updating ci files

ci/vmtest/configs/DENYLIST

@@ -4,4 +4,3 @@ kprobe_multi_test/bench_attach
 core_reloc/enum64val
 core_reloc/size___diff_sz
 core_reloc/type_based___diff_sz
-verify_pkcs7_sig

ci/vmtest/run_selftests.sh

@@ -1,5 +1,13 @@
 #!/bin/bash
 
+# run_selftest.sh will run the tests within /${PROJECT_NAME}/selftests/bpf
+# If no specific test names are given, all test will be ran, otherwise, it will
+# run the test passed as parameters.
+# There is 2 ways to pass test names.
+# 1) command-line arguments to this script
+# 2) a comma-separated list of test names passed as `run_tests` boot parameters.
+# test names passed as any of those methods will be ran.
+
 set -euo pipefail
 
 source $(cd $(dirname $0) && pwd)/helpers.sh
@@ -8,6 +16,8 @@ ARCH=$(uname -m)
 
 STATUS_FILE=/exitstatus
 
+declare -a TEST_NAMES=()
+
 read_lists() {
 	(for path in "$@"; do
 		if [[ -s "$path" ]]; then
@@ -22,6 +32,28 @@ TEST_PROGS_ARGS=""
 #   TEST_PROGS_ARGS="-j"
 # fi
 
+read_test_names() {
+    foldable start read_test_names "Reading test names from boot parameters and command line arguments"
+    # Check if test names were passed as boot parameter.
+    # We expect `run_tests` to be a comma-separated list of test names.
+    IFS=',' read -r -a test_names_from_boot <<< \
+        "$(sed -n 's/.*run_tests=\([^ ]*\).*/\1/p' /proc/cmdline)"
+
+    echo "${#test_names_from_boot[@]} tests extracted from boot parameters: ${test_names_from_boot[*]}"
+    # Sort and only keep unique test names from both boot params and arguments
+    # TEST_NAMES will contain a sorted list of uniq tests to be ran.
+    # Only do this if any of $test_names_from_boot[@] or $@ has elements as
+    # "printf '%s\0'" will otherwise generate an empty element.
+    if [[ ${#test_names_from_boot[@]} -gt 0 || $# -gt 0 ]]
+    then
+        readarray -t TEST_NAMES < \
+            <(printf '%s\0' "${test_names_from_boot[@]}" "$@" | \
+                sort --zero-terminated --unique | \
+                xargs --null --max-args=1)
+    fi
+    foldable end read_test_names
+}
+
 test_progs() {
   foldable start test_progs "Testing test_progs"
   # "&& true" does not change the return code (it is not executed
@@ -81,13 +113,18 @@ echo "ALLOWLIST: ${ALLOWLIST}"
 
 cd ${PROJECT_NAME}/selftests/bpf
 
-if [ $# -eq 0 ]; then
+# populate TEST_NAMES
+read_test_names "$@"
+# if we don't have any test name provided to the script, we run all tests.
+if [ ${#TEST_NAMES[@]} -eq 0 ]; then
 	test_progs
 	test_progs_no_alu32
 	test_maps
 	test_verifier
 else
-	for test_name in "$@"; do
+	# else we run the tests passed as command-line arguments and through boot
+	# parameter.
+	for test_name in "${TEST_NAMES[@]}"; do
 		"${test_name}"
 	done
 fi