libvirt/tests/cputestdata/cpu-cpuid.py

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#!/usr/bin/env python3
import os
import sys
import json
import xmltodict
def checkCPUIDFeature(cpuData, feature):
eax_in = feature["eax_in"]
ecx_in = feature["ecx_in"]
eax = feature["eax"]
ebx = feature["ebx"]
ecx = feature["ecx"]
edx = feature["edx"]
if "cpuid" not in cpuData:
return False
cpuid = cpuData["cpuid"]
if eax_in not in cpuid or ecx_in not in cpuid[eax_in]:
return False
leaf = cpuid[eax_in][ecx_in]
return ((eax > 0 and leaf["eax"] & eax == eax) or
(ebx > 0 and leaf["ebx"] & ebx == ebx) or
(ecx > 0 and leaf["ecx"] & ecx == ecx) or
(edx > 0 and leaf["edx"] & edx == edx))
def checkMSRFeature(cpuData, feature):
index = feature["index"]
edx = feature["edx"]
eax = feature["eax"]
if "msr" not in cpuData:
return False
msr = cpuData["msr"]
if index not in msr:
return False
msr = msr[index]
return ((edx > 0 and msr["edx"] & edx == edx) or
(eax > 0 and msr["eax"] & eax == eax))
def checkFeature(cpuData, feature):
if feature["type"] == "cpuid":
return checkCPUIDFeature(cpuData, feature)
if feature["type"] == "msr":
return checkMSRFeature(cpuData, feature)
def addCPUIDFeature(cpuData, feature):
if "cpuid" not in cpuData:
cpuData["cpuid"] = {}
cpuid = cpuData["cpuid"]
if feature["eax_in"] not in cpuid:
cpuid[feature["eax_in"]] = {}
leaf = cpuid[feature["eax_in"]]
if feature["ecx_in"] not in leaf:
leaf[feature["ecx_in"]] = {"eax": 0, "ebx": 0, "ecx": 0, "edx": 0}
leaf = leaf[feature["ecx_in"]]
for reg in ["eax", "ebx", "ecx", "edx"]:
leaf[reg] |= feature[reg]
def addMSRFeature(cpuData, feature):
if "msr" not in cpuData:
cpuData["msr"] = {}
msr = cpuData["msr"]
if feature["index"] not in msr:
msr[feature["index"]] = {"edx": 0, "eax": 0}
msr = msr[feature["index"]]
for reg in ["edx", "eax"]:
msr[reg] |= feature[reg]
def addFeature(cpuData, feature):
if feature["type"] == "cpuid":
addCPUIDFeature(cpuData, feature)
elif feature["type"] == "msr":
addMSRFeature(cpuData, feature)
def parseQemu(path, features):
cpuData = {}
with open(path, "r") as f:
data, pos = json.JSONDecoder().raw_decode(f.read())
for (prop, val) in data["return"]["model"]["props"].items():
if val and prop in features:
addFeature(cpuData, features[prop])
return cpuData
def parseCPUData(path):
cpuData = {}
with open(path, "rb") as f:
data = xmltodict.parse(f)
for leaf in data["cpudata"]["cpuid"]:
feature = {"type": "cpuid"}
feature["eax_in"] = int(leaf["@eax_in"], 0)
feature["ecx_in"] = int(leaf["@ecx_in"], 0)
for reg in ["eax", "ebx", "ecx", "edx"]:
feature[reg] = int(leaf["@" + reg], 0)
addFeature(cpuData, feature)
if "msr" in data["cpudata"]:
if not isinstance(data["cpudata"]["msr"], list):
data["cpudata"]["msr"] = [data["cpudata"]["msr"]]
for msr in data["cpudata"]["msr"]:
feature = {"type": "msr"}
feature["index"] = int(msr["@index"], 0)
feature["edx"] = int(msr["@edx"], 0)
feature["eax"] = int(msr["@eax"], 0)
addFeature(cpuData, feature)
return cpuData
def parseMapFeature(fType, data):
ret = {"type": fType}
if fType == "cpuid":
fields = ["eax_in", "ecx_in", "eax", "ebx", "ecx", "edx"]
elif fType == "msr":
fields = ["index", "edx", "eax"]
for field in fields:
attr = "@%s" % field
if attr in data:
ret[field] = int(data[attr], 0)
else:
ret[field] = 0
return ret
def parseMap():
path = os.path.dirname(sys.argv[0])
path = os.path.join(path, "..", "..", "src", "cpu_map", "x86_features.xml")
with open(path, "rb") as f:
data = xmltodict.parse(f)
cpuMap = {}
for feature in data["cpus"]["feature"]:
for fType in ["cpuid", "msr"]:
if fType in feature:
cpuMap[feature["@name"]] = parseMapFeature(fType, feature[fType])
return cpuMap
def formatCPUData(cpuData, path, comment):
print(path)
with open(path, "w") as f:
f.write("<!-- " + comment + " -->\n")
f.write("<cpudata arch='x86'>\n")
cpuid = cpuData["cpuid"]
for eax_in in sorted(cpuid.keys()):
for ecx_in in sorted(cpuid[eax_in].keys()):
leaf = cpuid[eax_in][ecx_in]
line = (" <cpuid eax_in='0x%08x' ecx_in='0x%02x' "
"eax='0x%08x' ebx='0x%08x' "
"ecx='0x%08x' edx='0x%08x'/>\n")
f.write(line % (
eax_in, ecx_in,
leaf["eax"], leaf["ebx"], leaf["ecx"], leaf["edx"]))
if "msr" in cpuData:
msr = cpuData["msr"]
for index in sorted(msr.keys()):
f.write(" <msr index='0x%x' edx='0x%08x' eax='0x%08x'/>\n" %(
index, msr[index]['edx'], msr[index]['eax']))
f.write("</cpudata>\n")
def diff(cpuMap, path):
base = path.replace(".json", "")
jsonFile = path
cpuDataFile = base + ".xml"
enabledFile = base + "-enabled.xml"
disabledFile = base + "-disabled.xml"
cpuData = parseCPUData(cpuDataFile)
qemu = parseQemu(jsonFile, cpuMap)
enabled = {"cpuid": {}}
disabled = {"cpuid": {}}
for feature in cpuMap.values():
if checkFeature(qemu, feature):
addFeature(enabled, feature)
elif checkFeature(cpuData, feature):
addFeature(disabled, feature)
formatCPUData(enabled, enabledFile, "Features enabled by QEMU")
formatCPUData(disabled, disabledFile, "Features disabled by QEMU")
if len(sys.argv) < 3:
print("Usage: %s diff json_file..." % sys.argv[0])
sys.exit(1)
action = sys.argv[1]
args = sys.argv[2:]
if action == "diff":
cpuMap = parseMap()
for path in args:
diff(cpuMap, path)
else:
print("Unknown action: %s" % action)
sys.exit(1)