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![Vladimir Sementsov-Ogievskiy](/assets/img/avatar_default.png)
Use a shorter name. We are going to move in iotests from qmp() to command() where possible. But command() is longer than qmp() and don't look better. Let's rename. You can simply grep for '\.command(' and for 'def command(' to check that everything is updated (command() in tests/docker/docker.py is unrelated). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Juan Quintela <quintela@redhat.com> Message-id: 20231006154125.1068348-6-vsementsov@yandex-team.ru [vsementsov: also update three occurrences in tests/avocado/machine_aspeed.py and keep r-b] Signed-off-by: John Snow <jsnow@redhat.com>
194 lines
4.7 KiB
Python
194 lines
4.7 KiB
Python
#!/usr/bin/python3
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#
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# SPDX-License-Identifier: GPL-2.0-or-later
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#
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# A script to generate a CSV file showing the x86_64 ABI
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# compatibility levels for each CPU model.
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#
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from qemu.qmp.legacy import QEMUMonitorProtocol
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import sys
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if len(sys.argv) != 2:
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print("syntax: %s QMP-SOCK\n\n" % __file__ +
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"Where QMP-SOCK points to a QEMU process such as\n\n" +
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" # qemu-system-x86_64 -qmp unix:/tmp/qmp,server,nowait " +
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"-display none -accel kvm", file=sys.stderr)
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sys.exit(1)
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# Mandatory CPUID features for each microarch ABI level
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levels = [
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[ # x86-64 baseline
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"cmov",
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"cx8",
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"fpu",
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"fxsr",
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"mmx",
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"syscall",
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"sse",
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"sse2",
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],
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[ # x86-64-v2
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"cx16",
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"lahf-lm",
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"popcnt",
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"pni",
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"sse4.1",
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"sse4.2",
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"ssse3",
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],
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[ # x86-64-v3
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"avx",
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"avx2",
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"bmi1",
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"bmi2",
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"f16c",
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"fma",
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"abm",
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"movbe",
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],
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[ # x86-64-v4
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"avx512f",
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"avx512bw",
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"avx512cd",
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"avx512dq",
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"avx512vl",
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],
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]
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# Assumes externally launched process such as
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#
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# qemu-system-x86_64 -qmp unix:/tmp/qmp,server,nowait -display none -accel kvm
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#
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# Note different results will be obtained with TCG, as
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# TCG masks out certain features otherwise present in
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# the CPU model definitions, as does KVM.
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sock = sys.argv[1]
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shell = QEMUMonitorProtocol(sock)
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shell.connect()
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models = shell.cmd("query-cpu-definitions")
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# These QMP props don't correspond to CPUID fatures
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# so ignore them
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skip = [
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"family",
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"min-level",
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"min-xlevel",
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"vendor",
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"model",
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"model-id",
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"stepping",
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]
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names = []
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for model in models:
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if "alias-of" in model:
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continue
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names.append(model["name"])
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models = {}
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for name in sorted(names):
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cpu = shell.cmd("query-cpu-model-expansion",
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{ "type": "static",
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"model": { "name": name }})
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got = {}
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for (feature, present) in cpu["model"]["props"].items():
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if present and feature not in skip:
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got[feature] = True
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if name in ["host", "max", "base"]:
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continue
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models[name] = {
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# Dict of all present features in this CPU model
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"features": got,
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# Whether each x86-64 ABI level is satisfied
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"levels": [False, False, False, False],
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# Number of extra CPUID features compared to the x86-64 ABI level
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"distance":[-1, -1, -1, -1],
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# CPUID features present in model, but not in ABI level
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"delta":[[], [], [], []],
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# CPUID features in ABI level but not present in model
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"missing": [[], [], [], []],
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}
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# Calculate whether the CPU models satisfy each ABI level
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for name in models.keys():
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for level in range(len(levels)):
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got = set(models[name]["features"])
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want = set(levels[level])
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missing = want - got
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match = True
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if len(missing) > 0:
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match = False
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models[name]["levels"][level] = match
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models[name]["missing"][level] = missing
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# Cache list of CPU models satisfying each ABI level
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abi_models = [
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[],
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[],
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[],
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[],
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]
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for name in models.keys():
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for level in range(len(levels)):
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if models[name]["levels"][level]:
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abi_models[level].append(name)
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for level in range(len(abi_models)):
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# Find the union of features in all CPU models satisfying this ABI
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allfeatures = {}
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for name in abi_models[level]:
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for feat in models[name]["features"]:
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allfeatures[feat] = True
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# Find the intersection of features in all CPU models satisfying this ABI
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commonfeatures = []
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for feat in allfeatures:
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present = True
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for name in models.keys():
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if not models[name]["levels"][level]:
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continue
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if feat not in models[name]["features"]:
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present = False
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if present:
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commonfeatures.append(feat)
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# Determine how many extra features are present compared to the lowest
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# common denominator
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for name in models.keys():
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if not models[name]["levels"][level]:
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continue
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delta = set(models[name]["features"].keys()) - set(commonfeatures)
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models[name]["distance"][level] = len(delta)
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models[name]["delta"][level] = delta
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def print_uarch_abi_csv():
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print("# Automatically generated from '%s'" % __file__)
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print("Model,baseline,v2,v3,v4")
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for name in models.keys():
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print(name, end="")
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for level in range(len(levels)):
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if models[name]["levels"][level]:
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print(",✅", end="")
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else:
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print(",", end="")
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print()
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print_uarch_abi_csv()
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