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cpu_map: Add script to sync from QEMU i386 cpu features
This script is intended to help in synchronizing i386 QEMU cpu feature definitions with libvirt. QEMU's attribute list for the "max-x86_64-cpu" contains non-cpu-feature items and needs to be filtered before being useful. Signed-off-by: Tim Wiederhake <twiederh@redhat.com> Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Tim Wiederhake
parent
1d946ac794
commit
fe69966cbb
278
src/cpu_map/sync_qemu_features_i386.py
Executable file
278
src/cpu_map/sync_qemu_features_i386.py
Executable file
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#!/usr/bin/env python3
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import argparse
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import json
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import subprocess
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import xml.etree.ElementTree
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def ignore_feature(feature):
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ignored_features = [
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# VIA/Cyrix/Centaur-defined CPU features
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# CPUID level 0xC0000001, word 5
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"ace2",
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"ace2-en",
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"phe",
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"phe-en",
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"pmm",
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"pmm-en",
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"xcrypt",
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"xcrypt-en",
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"xstore",
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"xstore-en",
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# non-features
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"check",
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"cpuid-0xb",
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"enforce",
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"fill-mtrr-mask",
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"full-cpuid-auto-level",
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"full-width-write",
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"host-cache-info",
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"host-phys-bits",
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"hotpluggable",
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"hotplugged",
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"hv-apicv",
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"hv-avic",
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"hv-crash",
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"hv-emsr-bitmap",
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"hv-enforce-cpuid",
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"hv-evmcs",
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"hv-frequencies",
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"hv-ipi",
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"hv-passthrough",
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"hv-reenlightenment",
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"hv-relaxed",
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"hv-reset",
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"hv-runtime",
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"hv-stimer",
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"hv-stimer-direct",
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"hv-syndbg",
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"hv-synic",
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"hv-time",
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"hv-tlbflush",
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"hv-tlbflush-direct",
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"hv-tlbflush-ext",
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"hv-vapic",
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"hv-vpindex",
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"hv-xmm-input",
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"kvm",
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"kvm-asyncpf",
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"kvm-asyncpf-int",
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"kvm-hint-dedicated",
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"kvm-mmu",
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"kvm-msi-ext-dest-id",
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"kvm-no-smi-migration",
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"kvm-nopiodelay",
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"kvm-poll-control",
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"kvm-pv-enforce-cpuid",
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"kvm-pv-eoi",
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"kvm-pv-ipi",
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"kvm-pv-sched-yield",
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"kvm-pv-tlb-flush",
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"kvm-pv-unhalt",
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"kvm-steal-time",
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"kvm_asyncpf",
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"kvm_asyncpf_int",
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"kvm_mmu",
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"kvm_nopiodelay",
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"kvm_poll_control",
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"kvm_pv_eoi",
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"kvm_pv_unhalt",
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"kvm_steal_time",
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"kvmclock",
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"kvmclock-stable-bit",
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"l3-cache",
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"legacy-cache",
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"lmce",
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"migratable",
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"pmu",
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"realized",
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"start-powered-off",
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"tcg-cpuid",
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"vmware-cpuid-freq",
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"vmx-activity-hlt",
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"vmx-activity-shutdown",
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"vmx-activity-wait-sipi",
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"vmx-apicv-register",
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"vmx-apicv-vid",
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"vmx-apicv-x2apic",
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"vmx-apicv-xapic",
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"vmx-cr3-load-noexit",
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"vmx-cr3-store-noexit",
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"vmx-cr8-load-exit",
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"vmx-cr8-store-exit",
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"vmx-desc-exit",
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"vmx-encls-exit",
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"vmx-entry-ia32e-mode",
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"vmx-entry-load-bndcfgs",
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"vmx-entry-load-efer",
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"vmx-entry-load-pat",
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"vmx-entry-load-perf-global-ctrl",
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"vmx-entry-load-pkrs",
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"vmx-entry-load-rtit-ctl",
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"vmx-entry-noload-debugctl",
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"vmx-ept",
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"vmx-ept-1gb",
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"vmx-ept-2mb",
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"vmx-ept-advanced-exitinfo",
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"vmx-ept-execonly",
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"vmx-eptad",
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"vmx-eptp-switching",
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"vmx-exit-ack-intr",
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"vmx-exit-clear-bndcfgs",
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"vmx-exit-clear-rtit-ctl",
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"vmx-exit-load-efer",
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"vmx-exit-load-pat",
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"vmx-exit-load-perf-global-ctrl",
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"vmx-exit-load-pkrs",
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"vmx-exit-nosave-debugctl",
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"vmx-exit-save-efer",
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"vmx-exit-save-pat",
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"vmx-exit-save-preemption-timer",
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"vmx-flexpriority",
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"vmx-hlt-exit",
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"vmx-ins-outs",
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"vmx-intr-exit",
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"vmx-invept",
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"vmx-invept-all-context",
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"vmx-invept-single-context",
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"vmx-invept-single-context-noglobals",
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"vmx-invlpg-exit",
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"vmx-invpcid-exit",
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"vmx-invvpid",
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"vmx-invvpid-all-context",
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"vmx-invvpid-single-addr",
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"vmx-io-bitmap",
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"vmx-io-exit",
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"vmx-monitor-exit",
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"vmx-movdr-exit",
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"vmx-msr-bitmap",
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"vmx-mtf",
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"vmx-mwait-exit",
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"vmx-nmi-exit",
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"vmx-page-walk-4",
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"vmx-page-walk-5",
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"vmx-pause-exit",
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"vmx-ple",
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"vmx-pml",
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"vmx-posted-intr",
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"vmx-preemption-timer",
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"vmx-rdpmc-exit",
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"vmx-rdrand-exit",
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"vmx-rdseed-exit",
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"vmx-rdtsc-exit",
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"vmx-rdtscp-exit",
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"vmx-secondary-ctls",
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"vmx-shadow-vmcs",
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"vmx-store-lma",
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"vmx-true-ctls",
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"vmx-tsc-offset",
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"vmx-tsc-scaling",
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"vmx-unrestricted-guest",
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"vmx-vintr-pending",
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"vmx-vmfunc",
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"vmx-vmwrite-vmexit-fields",
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"vmx-vnmi",
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"vmx-vnmi-pending",
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"vmx-vpid",
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"vmx-wbinvd-exit",
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"vmx-xsaves",
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"vmx-zero-len-inject",
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]
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if feature["type"] != "bool":
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return True
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name = feature["name"]
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if name.startswith("x-"):
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return True
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if name in ignored_features:
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return True
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return False
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def get_qemu_feature_list(path_to_qemu):
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cmd = [
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path_to_qemu,
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"-machine", "accel=kvm",
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"-cpu", "host",
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"-nodefaults",
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"-nographic",
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"-qmp",
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"stdio"
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]
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request = """
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{
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"execute": "qmp_capabilities"
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}
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{
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"execute": "qom-list-properties",
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"arguments": {
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"typename": "max-x86_64-cpu"
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},
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"id": "qom-list-properties"
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}
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{
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"execute": "quit"
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}
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"""
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decoder = json.JSONDecoder()
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output = subprocess.check_output(cmd, input=request, text=True)
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while output:
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obj, idx = decoder.raw_decode(output)
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output = output[idx:].strip()
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if obj.get("id") != "qom-list-properties":
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continue
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for feature in obj["return"]:
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if ignore_feature(feature):
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continue
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yield feature["name"]
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def get_libvirt_feature_list(path_to_featuresfile):
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dom = xml.etree.ElementTree.parse(path_to_featuresfile)
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for feature in dom.getroot().iter("feature"):
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yield feature.get("name")
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for alias in feature:
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if alias.tag == "alias" and alias.get("source") == "qemu":
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yield alias.get("name")
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def main():
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parser = argparse.ArgumentParser(
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description="Synchronize x86 cpu features from QEMU i386 target.")
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parser.add_argument(
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"--qemu",
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help="Path to qemu executable",
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default="qemu-system-x86_64",
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type=str)
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parser.add_argument(
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"--features",
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help="Path to 'src/cpu_map/x86_features.xml' file in "
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"the libvirt repository",
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default="x86_features.xml",
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type=str)
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args = parser.parse_args()
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qfeatures = get_qemu_feature_list(args.qemu)
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lfeatures = list(get_libvirt_feature_list(args.features))
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missing = [f for f in sorted(qfeatures) if f not in lfeatures]
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if missing:
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print("The following features were reported by qemu but are "
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"unknown to libvirt:")
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for feature in missing:
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print(" *", feature)
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return len(missing) != 0
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if __name__ == "__main__":
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exit(main())
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