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#!/usr/bin/env python3
import argparse
import json
import subprocess
import xml.etree.ElementTree
def ignore_feature(feature):
ignored_features = [
# VIA/Cyrix/Centaur-defined CPU features
# CPUID level 0xC0000001, word 5
"ace2",
"ace2-en",
"phe",
"phe-en",
"pmm",
"pmm-en",
"xcrypt",
"xcrypt-en",
"xstore",
"xstore-en",
# non-features
"check",
"cpuid-0xb",
"enforce",
"fill-mtrr-mask",
"full-cpuid-auto-level",
"full-width-write",
"host-cache-info",
"host-phys-bits",
"hotpluggable",
"hotplugged",
"hv-apicv",
"hv-avic",
"hv-crash",
"hv-emsr-bitmap",
"hv-enforce-cpuid",
"hv-evmcs",
"hv-frequencies",
"hv-ipi",
"hv-passthrough",
"hv-reenlightenment",
"hv-relaxed",
"hv-reset",
"hv-runtime",
"hv-stimer",
"hv-stimer-direct",
"hv-syndbg",
"hv-synic",
"hv-time",
"hv-tlbflush",
"hv-tlbflush-direct",
"hv-tlbflush-ext",
"hv-vapic",
"hv-vpindex",
"hv-xmm-input",
"kvm",
"kvm-asyncpf",
"kvm-asyncpf-int",
"kvm-hint-dedicated",
"kvm-mmu",
"kvm-msi-ext-dest-id",
"kvm-no-smi-migration",
"kvm-nopiodelay",
"kvm-poll-control",
"kvm-pv-enforce-cpuid",
"kvm-pv-eoi",
"kvm-pv-ipi",
"kvm-pv-sched-yield",
"kvm-pv-tlb-flush",
"kvm-pv-unhalt",
"kvm-steal-time",
"kvm_asyncpf",
"kvm_asyncpf_int",
"kvm_mmu",
"kvm_nopiodelay",
"kvm_poll_control",
"kvm_pv_eoi",
"kvm_pv_unhalt",
"kvm_steal_time",
"kvmclock",
"kvmclock-stable-bit",
"l3-cache",
"legacy-cache",
"lmce",
"migratable",
"pmu",
"realized",
"start-powered-off",
"tcg-cpuid",
"vmware-cpuid-freq",
"vmx-activity-hlt",
"vmx-activity-shutdown",
"vmx-activity-wait-sipi",
"vmx-apicv-register",
"vmx-apicv-vid",
"vmx-apicv-x2apic",
"vmx-apicv-xapic",
"vmx-cr3-load-noexit",
"vmx-cr3-store-noexit",
"vmx-cr8-load-exit",
"vmx-cr8-store-exit",
"vmx-desc-exit",
"vmx-encls-exit",
"vmx-entry-ia32e-mode",
"vmx-entry-load-bndcfgs",
"vmx-entry-load-efer",
"vmx-entry-load-pat",
"vmx-entry-load-perf-global-ctrl",
"vmx-entry-load-pkrs",
"vmx-entry-load-rtit-ctl",
"vmx-entry-noload-debugctl",
"vmx-ept",
"vmx-ept-1gb",
"vmx-ept-2mb",
"vmx-ept-advanced-exitinfo",
"vmx-ept-execonly",
"vmx-eptad",
"vmx-eptp-switching",
"vmx-exit-ack-intr",
"vmx-exit-clear-bndcfgs",
"vmx-exit-clear-rtit-ctl",
"vmx-exit-load-efer",
"vmx-exit-load-pat",
"vmx-exit-load-perf-global-ctrl",
"vmx-exit-load-pkrs",
"vmx-exit-nosave-debugctl",
"vmx-exit-save-efer",
"vmx-exit-save-pat",
"vmx-exit-save-preemption-timer",
"vmx-flexpriority",
"vmx-hlt-exit",
"vmx-ins-outs",
"vmx-intr-exit",
"vmx-invept",
"vmx-invept-all-context",
"vmx-invept-single-context",
"vmx-invept-single-context-noglobals",
"vmx-invlpg-exit",
"vmx-invpcid-exit",
"vmx-invvpid",
"vmx-invvpid-all-context",
"vmx-invvpid-single-addr",
"vmx-io-bitmap",
"vmx-io-exit",
"vmx-monitor-exit",
"vmx-movdr-exit",
"vmx-msr-bitmap",
"vmx-mtf",
"vmx-mwait-exit",
"vmx-nmi-exit",
"vmx-page-walk-4",
"vmx-page-walk-5",
"vmx-pause-exit",
"vmx-ple",
"vmx-pml",
"vmx-posted-intr",
"vmx-preemption-timer",
"vmx-rdpmc-exit",
"vmx-rdrand-exit",
"vmx-rdseed-exit",
"vmx-rdtsc-exit",
"vmx-rdtscp-exit",
"vmx-secondary-ctls",
"vmx-shadow-vmcs",
"vmx-store-lma",
"vmx-true-ctls",
"vmx-tsc-offset",
"vmx-tsc-scaling",
"vmx-unrestricted-guest",
"vmx-vintr-pending",
"vmx-vmfunc",
"vmx-vmwrite-vmexit-fields",
"vmx-vnmi",
"vmx-vnmi-pending",
"vmx-vpid",
"vmx-wbinvd-exit",
"vmx-xsaves",
"vmx-zero-len-inject",
"xen-vapic",
]
if feature["type"] != "bool":
return True
name = feature["name"]
if name.startswith("x-"):
return True
if name in ignored_features:
return True
return False
def get_qemu_feature_list(path_to_qemu):
cmd = [
path_to_qemu,
"-machine", "accel=kvm",
"-cpu", "host",
"-nodefaults",
"-nographic",
"-qmp",
"stdio"
]
request = """
{
"execute": "qmp_capabilities"
}
{
"execute": "qom-list-properties",
"arguments": {
"typename": "max-x86_64-cpu"
},
"id": "qom-list-properties"
}
{
"execute": "quit"
}
"""
decoder = json.JSONDecoder()
output = subprocess.check_output(cmd, input=request, text=True)
while output:
obj, idx = decoder.raw_decode(output)
output = output[idx:].strip()
if obj.get("id") != "qom-list-properties":
continue
for feature in obj["return"]:
if ignore_feature(feature):
continue
yield feature["name"]
def get_libvirt_feature_list(path_to_featuresfile):
dom = xml.etree.ElementTree.parse(path_to_featuresfile)
for feature in dom.getroot().iter("feature"):
yield feature.get("name")
for alias in feature:
if alias.tag == "alias" and alias.get("source") == "qemu":
yield alias.get("name")
def main():
parser = argparse.ArgumentParser(
description="Synchronize x86 cpu features from QEMU i386 target.")
parser.add_argument(
"--qemu",
help="Path to qemu executable",
default="qemu-system-x86_64",
type=str)
parser.add_argument(
"--features",
help="Path to 'src/cpu_map/x86_features.xml' file in "
"the libvirt repository",
default="x86_features.xml",
type=str)
args = parser.parse_args()
qfeatures = get_qemu_feature_list(args.qemu)
lfeatures = list(get_libvirt_feature_list(args.features))
missing = [f for f in sorted(qfeatures) if f not in lfeatures]
if missing:
print("The following features were reported by qemu but are "
"unknown to libvirt:")
for feature in missing:
print(" *", feature)
return len(missing) != 0
if __name__ == "__main__":
exit(main())
|
