split script in multiple files, reassembled through build.sh

src/libs/310_cpu_msr_load.sh

@@ -0,0 +1,32 @@
+# vim: set ts=4 sw=4 sts=4 et:
+# Mount debugfs if not already available, remembering to unmount on cleanup
+# Sets: g_mounted_debugfs
+mount_debugfs() {
+    if [ ! -e "$DEBUGFS_BASE/sched_features" ]; then
+        # try to mount the debugfs hierarchy ourselves and remember it to umount afterwards
+        mount -t debugfs debugfs "$DEBUGFS_BASE" 2>/dev/null && g_mounted_debugfs=1
+    fi
+}
+
+# Load the MSR kernel module (Linux) or cpuctl (BSD) if not already loaded
+# Sets: g_insmod_msr, g_kldload_cpuctl
+load_msr() {
+    [ "${g_load_msr_once:-}" = 1 ] && return
+    g_load_msr_once=1
+
+    if [ "$g_os" = Linux ]; then
+        if ! grep -qw msr "$g_procfs/modules" 2>/dev/null; then
+            modprobe msr 2>/dev/null && g_insmod_msr=1
+            pr_debug "attempted to load module msr, g_insmod_msr=$g_insmod_msr"
+        else
+            pr_debug "msr module already loaded"
+        fi
+    else
+        if ! kldstat -q -m cpuctl; then
+            kldload cpuctl 2>/dev/null && g_kldload_cpuctl=1
+            pr_debug "attempted to load module cpuctl, g_kldload_cpuctl=$g_kldload_cpuctl"
+        else
+            pr_debug "cpuctl module already loaded"
+        fi
+    fi
+}