提交 03331801 编写于 作者: D Daniel P. Berrange

Introduce a set of APIs for managing architectures

Introduce a 'virArch' enum for CPU architectures. Include
data type providing wordsize and endianness, and APIs to
query this info and convert to/from enum and string form.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>
上级 d60c7f75
......@@ -80,6 +80,7 @@ UTIL_SOURCES = \
util/threadpool.c util/threadpool.h \
util/uuid.c util/uuid.h \
util/util.c util/util.h \
util/virarch.h util/virarch.c \
util/viratomic.h util/viratomic.c \
util/viraudit.c util/viraudit.h \
util/virauth.c util/virauth.h \
......
/*
* virarch.c: architecture handling
*
* Copyright (C) 2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include <sys/utsname.h>
#include "logging.h"
#include "virarch.h"
#include "verify.h"
/* The canonical names are used in XML documents. ie ABI sensitive */
static const struct virArchData {
const char *name;
unsigned int wordsize;
virArchEndian endian;
} virArchData[] = {
{ "none", 0, VIR_ARCH_LITTLE_ENDIAN },
{ "alpha", 64, VIR_ARCH_BIG_ENDIAN },
{ "armv7l", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "cris", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "i686", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "itanium", 64, VIR_ARCH_LITTLE_ENDIAN },
{ "lm32", 32, VIR_ARCH_BIG_ENDIAN },
{ "m68k", 32, VIR_ARCH_BIG_ENDIAN },
{ "microblaze", 32, VIR_ARCH_BIG_ENDIAN },
{ "microblazeel", 32, VIR_ARCH_LITTLE_ENDIAN},
{ "mips", 32, VIR_ARCH_BIG_ENDIAN },
{ "mipsel", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "mips64", 64, VIR_ARCH_BIG_ENDIAN },
{ "mips64el", 64, VIR_ARCH_LITTLE_ENDIAN },
{ "openrisc", 32, VIR_ARCH_BIG_ENDIAN },
{ "parisc", 32, VIR_ARCH_BIG_ENDIAN },
{ "parisc64", 64, VIR_ARCH_BIG_ENDIAN },
{ "ppc", 32, VIR_ARCH_BIG_ENDIAN },
{ "ppc64", 64, VIR_ARCH_BIG_ENDIAN },
{ "ppcemb", 32, VIR_ARCH_BIG_ENDIAN },
{ "s390", 32, VIR_ARCH_BIG_ENDIAN },
{ "s390x", 64, VIR_ARCH_BIG_ENDIAN },
{ "sh4", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "sh4eb", 64, VIR_ARCH_BIG_ENDIAN },
{ "sparc", 32, VIR_ARCH_BIG_ENDIAN },
{ "sparc64", 64, VIR_ARCH_BIG_ENDIAN },
{ "unicore32", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "x86_64", 64, VIR_ARCH_LITTLE_ENDIAN },
{ "xtensa", 32, VIR_ARCH_LITTLE_ENDIAN },
{ "xtensaeb", 32, VIR_ARCH_BIG_ENDIAN },
};
verify(ARRAY_CARDINALITY(virArchData) == VIR_ARCH_LAST);
/**
* virArchGetWordSize:
* @arch: the CPU architecture
*
* Return the wordsize of the CPU architecture (32 or 64)
*/
unsigned int virArchGetWordSize(virArch arch)
{
if (arch >= VIR_ARCH_LAST)
arch = VIR_ARCH_NONE;
return virArchData[arch].wordsize;
}
/**
* virArchGetEndian:
* @arch: the CPU architecture
*
* Return the endian-ness of the CPU architecture
* (VIR_ARCH_LITTLE_ENDIAN or VIR_ARCH_BIG_ENDIAN)
*/
virArchEndian virArchGetEndian(virArch arch)
{
if (arch >= VIR_ARCH_LAST)
arch = VIR_ARCH_NONE;
return virArchData[arch].endian;
}
/**
* virArchToString:
* @arch: the CPU architecture
*
* Return the string name of the architecture
*/
const char *virArchToString(virArch arch)
{
if (arch >= VIR_ARCH_LAST)
arch = VIR_ARCH_NONE;
return virArchData[arch].name;
}
/**
* virArchFromString:
* @archstr: the CPU architecture string
*
* Return the architecture matching @archstr,
* defaulting to VIR_ARCH_NONE if unidentified
*/
virArch virArchFromString(const char *archstr)
{
size_t i;
for (i = 1 ; i < VIR_ARCH_LAST ; i++) {
if (STREQ(virArchData[i].name, archstr))
return i;
}
VIR_DEBUG("Unknown arch %s", archstr);
return VIR_ARCH_NONE;
}
/**
* virArchFromHost:
*
* Return the host architecture. Prefer this to the
* uname 'machine' field, since this will canonicalize
* architecture names like 'amd64' into 'x86_64'.
*/
virArch virArchFromHost(void)
{
struct utsname ut;
virArch arch;
uname(&ut);
/* Some special cases we need to handle first
* for non-canonical names */
if (strlen(ut.machine) == 4 &&
ut.machine[0] == 'i' &&
ut.machine[2] == '8' &&
ut.machine[3] == '6' &&
ut.machine[4] == '\0') {
arch = VIR_ARCH_I686;
} else if (STREQ(ut.machine, "ia64")) {
arch = VIR_ARCH_ITANIUM;
} else if (STREQ(ut.machine, "amd64")) {
arch = VIR_ARCH_X86_64;
} else {
/* Otherwise assume the canonical name */
if ((arch = virArchFromString(ut.machine)) == VIR_ARCH_NONE) {
VIR_WARN("Unknown host arch %s, report to libvir-list@redhat.com",
ut.machine);
}
}
VIR_DEBUG("Mapped %s to %d (%s)",
ut.machine, arch, virArchToString(arch));
return arch;
}
/*
* virarch.h: architecture handling
*
* Copyright (C) 2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef __VIR_ARCH_H__
# define __VIR_ARCH_H__
# include "internal.h"
typedef enum {
VIR_ARCH_NONE,
VIR_ARCH_ALPHA, /* Alpha 64 BE http://en.wikipedia.org/wiki/DEC_Alpha */
VIR_ARCH_ARMV7L, /* ARMv7 32 LE http://en.wikipedia.org/wiki/ARM_architecture */
VIR_ARCH_CRIS, /* ETRAX 32 LE http://en.wikipedia.org/wiki/ETRAX_CRIS */
VIR_ARCH_I686, /* x86 32 LE http://en.wikipedia.org/wiki/X86 */
VIR_ARCH_ITANIUM, /* Itanium 64 LE http://en.wikipedia.org/wiki/Itanium */
VIR_ARCH_LM32, /* MilkyMist 32 BE http://en.wikipedia.org/wiki/Milkymist */
VIR_ARCH_M68K, /* m68k 32 BE http://en.wikipedia.org/wiki/Motorola_68000_family */
VIR_ARCH_MICROBLAZE, /* Microblaze 32 BE http://en.wikipedia.org/wiki/MicroBlaze */
VIR_ARCH_MICROBLAZEEL, /* Microblaze 32 LE http://en.wikipedia.org/wiki/MicroBlaze */
VIR_ARCH_MIPS, /* MIPS 32 BE http://en.wikipedia.org/wiki/MIPS_architecture */
VIR_ARCH_MIPSEL, /* MIPS 32 LE http://en.wikipedia.org/wiki/MIPS_architecture */
VIR_ARCH_MIPS64, /* MIPS 64 BE http://en.wikipedia.org/wiki/MIPS_architecture */
VIR_ARCH_MIPS64EL, /* MIPS 64 LE http://en.wikipedia.org/wiki/MIPS_architecture */
VIR_ARCH_OR32, /* OpenRisc 32 BE http://en.wikipedia.org/wiki/OpenRISC#QEMU_support*/
VIR_ARCH_PARISC, /* PA-Risc 32 BE http://en.wikipedia.org/wiki/PA-RISC */
VIR_ARCH_PARISC64, /* PA-Risc 64 BE http://en.wikipedia.org/wiki/PA-RISC */
VIR_ARCH_PPC, /* PowerPC 32 BE http://en.wikipedia.org/wiki/PowerPC */
VIR_ARCH_PPC64, /* PowerPC 64 BE http://en.wikipedia.org/wiki/PowerPC */
VIR_ARCH_PPCEMB, /* PowerPC 32 BE http://en.wikipedia.org/wiki/PowerPC */
VIR_ARCH_S390, /* S390 32 BE http://en.wikipedia.org/wiki/S390 */
VIR_ARCH_S390X, /* S390 64 BE http://en.wikipedia.org/wiki/S390x */
VIR_ARCH_SH4, /* SuperH4 32 LE http://en.wikipedia.org/wiki/SuperH */
VIR_ARCH_SH4EB, /* SuperH4 32 BE http://en.wikipedia.org/wiki/SuperH */
VIR_ARCH_SPARC, /* Sparc 32 BE http://en.wikipedia.org/wiki/Sparc */
VIR_ARCH_SPARC64, /* Sparc 64 BE http://en.wikipedia.org/wiki/Sparc */
VIR_ARCH_UNICORE32, /* UniCore 32 LE http://en.wikipedia.org/wiki/Unicore*/
VIR_ARCH_X86_64, /* x86 64 LE http://en.wikipedia.org/wiki/X86 */
VIR_ARCH_XTENSA, /* XTensa 32 LE http://en.wikipedia.org/wiki/Xtensa#Processor_Cores */
VIR_ARCH_XTENSAEB, /* XTensa 32 BE http://en.wikipedia.org/wiki/Xtensa#Processor_Cores */
VIR_ARCH_LAST,
} virArch;
typedef enum {
VIR_ARCH_LITTLE_ENDIAN,
VIR_ARCH_BIG_ENDIAN,
} virArchEndian;
unsigned int virArchGetWordSize(virArch arch);
virArchEndian virArchGetEndian(virArch arch);
const char *virArchToString(virArch arch);
virArch virArchFromString(const char *name);
virArch virArchFromHost(void);
#endif /* __VIR_ARCH_H__ */
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