config-tools: bring all cores online

Bring all the cores up in the beginning of the board_inspector.py
It is expected to run board_inspector in clean and native environment.
To resolve the issue that user may run other jobs which puts cores
offline, bringing up all cores online so tool can run cpuid to extract
all available cores information.

Tracked-On: #7119
Signed-off-by: Yang,Yu-chu <yu-chu.yang@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>

misc/config_tools/board_inspector/board_inspector.py

@@ -11,7 +11,7 @@ import subprocess # nosec
 import lxml.etree
 import argparse
 from importlib import import_module
-from cpuparser import parse_cpuid, get_online_cpu_ids
+from cpuparser import parse_cpuid, get_online_cpu_ids, get_offline_cpu_ids
 
 script_dir = os.path.dirname(os.path.realpath(__file__))
 sys.path.append(os.path.join(script_dir))
@@ -48,6 +48,15 @@ def native_check():
         logging.warning(f"Board inspector is running inside a Virtual Machine (VM). Running ACRN inside a VM is only" \
         "supported under KVM/QEMU. Unexpected results may occur when deviating from that combination.")
 
+def bring_up_cores():
+    cpu_ids = get_offline_cpu_ids()
+    for id in cpu_ids:
+        try:
+            with open("/sys/devices/system/cpu/cpu{}/online".format(id), "w") as f:
+                f.write("1")
+        except :
+            logging.warning("Cannot bring up core with cpu id {}.".format(id))
+
 def main(board_name, board_xml, args):
     # Check that the dependencies are met
     check_deps()
@@ -55,6 +64,9 @@ def main(board_name, board_xml, args):
     # Check if this is native os
     native_check()
 
+    # Bring up all cores
+    bring_up_cores()
+
     try:
         # First invoke the legacy board parser to create the board XML ...
         legacy_parser = os.path.join(script_dir, "legacy", "board_parser.py")

misc/config_tools/board_inspector/cpuparser/__init__.py

@@ -60,14 +60,21 @@ def parse_cpuid(leaf, subleaf, cpu_id):
     else:
         return None
 
-def get_online_cpu_ids():
+def parse_cpu_ids(file):
     acc = list()
-    with open("/sys/devices/system/cpu/online", "r") as f:
+    with open(file, "r") as f:
         line = f.read().strip()
         for r in line.split(","):
             if r.find("-") > 0:
                 first, last = tuple(map(int, r.split("-")))
                 acc.extend(range(first, last + 1))
             else:
-                acc.append(int(r))
+                if r:
+                    acc.append(int(r))
     return acc
+
+def get_online_cpu_ids():
+    return parse_cpu_ids("/sys/devices/system/cpu/online")
+
+def get_offline_cpu_ids():
+    return parse_cpu_ids("/sys/devices/system/cpu/offline")