163 lines
3.0 KiB
Python
163 lines
3.0 KiB
Python
# Copyright 2014 Red Hat, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Constants and helper APIs for dealing with CPU architectures
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The constants provide the standard names for all known processor
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architectures. Many have multiple variants to deal with big-endian
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vs little-endian modes, as well as 32 vs 64 bit word sizes. These
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names are chosen to be identical to the architecture names expected
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by libvirt, so if ever adding new ones, ensure it matches libvirt's
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expectation.
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"""
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import os
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from nova import exception
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ALPHA = "alpha"
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ARMV6 = "armv6"
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ARMV7 = "armv7l"
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ARMV7B = "armv7b"
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AARCH64 = "aarch64"
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CRIS = "cris"
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I686 = "i686"
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IA64 = "ia64"
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LM32 = "lm32"
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M68K = "m68k"
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MICROBLAZE = "microblaze"
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MICROBLAZEEL = "microblazeel"
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MIPS = "mips"
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MIPSEL = "mipsel"
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MIPS64 = "mips64"
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MIPS64EL = "mips64el"
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OPENRISC = "openrisc"
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PARISC = "parisc"
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PARISC64 = "parisc64"
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PPC = "ppc"
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PPCLE = "ppcle"
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PPC64 = "ppc64"
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PPC64LE = "ppc64le"
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PPCEMB = "ppcemb"
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S390 = "s390"
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S390X = "s390x"
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SH4 = "sh4"
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SH4EB = "sh4eb"
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SPARC = "sparc"
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SPARC64 = "sparc64"
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UNICORE32 = "unicore32"
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X86_64 = "x86_64"
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XTENSA = "xtensa"
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XTENSAEB = "xtensaeb"
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ALL = [
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ALPHA,
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ARMV6,
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ARMV7,
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ARMV7B,
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AARCH64,
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CRIS,
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I686,
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IA64,
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LM32,
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M68K,
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MICROBLAZE,
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MICROBLAZEEL,
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MIPS,
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MIPSEL,
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MIPS64,
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MIPS64EL,
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OPENRISC,
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PARISC,
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PARISC64,
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PPC,
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PPCLE,
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PPC64,
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PPC64LE,
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PPCEMB,
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S390,
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S390X,
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SH4,
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SH4EB,
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SPARC,
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SPARC64,
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UNICORE32,
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X86_64,
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XTENSA,
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XTENSAEB,
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]
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def from_host():
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"""Get the architecture of the host OS
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:returns: the canonicalized host architecture
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"""
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return canonicalize(os.uname()[4])
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def is_valid(name):
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"""Check if a string is a valid architecture
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:param name: architecture name to validate
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:returns: True if @name is valid
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"""
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return name in ALL
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def canonicalize(name):
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"""Canonicalize the architecture name
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:param name: architecture name to canonicalize
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:returns: a canonical architecture name
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"""
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if name is None:
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return None
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newname = name.lower()
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if newname in ("i386", "i486", "i586"):
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newname = I686
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# Xen mistake from Icehouse or earlier
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if newname in ("x86_32", "x86_32p"):
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newname = I686
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if newname == "amd64":
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newname = X86_64
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if not is_valid(newname):
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raise exception.InvalidArchitectureName(arch=name)
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return newname
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