diff options
Diffstat (limited to 'src/VBox/Runtime/r3/freebsd/mp-freebsd.cpp')
| -rw-r--r-- | src/VBox/Runtime/r3/freebsd/mp-freebsd.cpp | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/freebsd/mp-freebsd.cpp b/src/VBox/Runtime/r3/freebsd/mp-freebsd.cpp new file mode 100644 index 00000000..8b2f5f83 --- /dev/null +++ b/src/VBox/Runtime/r3/freebsd/mp-freebsd.cpp @@ -0,0 +1,211 @@ +/* $Id: mp-freebsd.cpp $ */ +/** @file + * IPRT - Multiprocessor, FreeBSD. + */ + +/* + * Copyright (C) 2008-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP RTLOGGROUP_SYSTEM +#include <unistd.h> +#include <stdio.h> +#include <errno.h> +#include <sys/sysctl.h> + +#include <iprt/mp.h> +#include <iprt/cpuset.h> +#include <iprt/assert.h> +#include <iprt/string.h> +#include <iprt/alloc.h> +#include <iprt/log.h> +#include <iprt/once.h> +#include <iprt/critsect.h> + + +/** + * Internal worker that determines the max possible CPU count. + * + * @returns Max cpus. + */ +static RTCPUID rtMpFreeBsdMaxCpus(void) +{ + int aiMib[2]; + aiMib[0] = CTL_HW; + aiMib[1] = HW_NCPU; + int cCpus = -1; + size_t cb = sizeof(cCpus); + int rc = sysctl(aiMib, RT_ELEMENTS(aiMib), &cCpus, &cb, NULL, 0); + if (rc != -1 && cCpus >= 1) + return cCpus; + AssertFailed(); + return 1; +} + + +RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu) +{ + return idCpu < RTCPUSET_MAX_CPUS && idCpu < rtMpFreeBsdMaxCpus() ? idCpu : -1; +} + + +RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu) +{ + return (unsigned)iCpu < rtMpFreeBsdMaxCpus() ? iCpu : NIL_RTCPUID; +} + + +RTDECL(RTCPUID) RTMpGetMaxCpuId(void) +{ + return rtMpFreeBsdMaxCpus() - 1; +} + + +RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu) +{ + /* + * FreeBSD doesn't support CPU hotplugging so every CPU which appears + * in the tree is also online. + */ + char szName[40]; + RTStrPrintf(szName, sizeof(szName), "dev.cpu.%d.%%driver", (int)idCpu); + + char szDriver[10]; + size_t cbDriver = sizeof(szDriver); + RT_ZERO(szDriver); /* this shouldn't be necessary. */ + int rcBsd = sysctlbyname(szName, szDriver, &cbDriver, NULL, 0); + if (rcBsd == 0) + return true; + + return false; +} + + +RTDECL(bool) RTMpIsCpuPossible(RTCPUID idCpu) +{ + return idCpu != NIL_RTCPUID + && idCpu < rtMpFreeBsdMaxCpus(); +} + + +RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet) +{ + RTCpuSetEmpty(pSet); + RTCPUID cMax = rtMpFreeBsdMaxCpus(); + for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++) + if (RTMpIsCpuPossible(idCpu)) + RTCpuSetAdd(pSet, idCpu); + return pSet; +} + + +RTDECL(RTCPUID) RTMpGetCount(void) +{ + return rtMpFreeBsdMaxCpus(); +} + + +RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet) +{ + RTCpuSetEmpty(pSet); + RTCPUID cMax = rtMpFreeBsdMaxCpus(); + for (RTCPUID idCpu = 0; idCpu < cMax; idCpu++) + if (RTMpIsCpuOnline(idCpu)) + RTCpuSetAdd(pSet, idCpu); + return pSet; +} + + +RTDECL(RTCPUID) RTMpGetOnlineCount(void) +{ + /* + * FreeBSD has sysconf. + */ + return sysconf(_SC_NPROCESSORS_ONLN); +} + + +RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu) +{ + int uFreqCurr = 0; + size_t cbParameter = sizeof(uFreqCurr); + + if (!RTMpIsCpuOnline(idCpu)) + return 0; + + /* CPU's have a common frequency. */ + int rc = sysctlbyname("dev.cpu.0.freq", &uFreqCurr, &cbParameter, NULL, 0); + if (rc) + return 0; + + return (uint32_t)uFreqCurr; +} + + +RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu) +{ + char szFreqLevels[20]; /* Should be enough to get the highest level which is always the first. */ + size_t cbFreqLevels = sizeof(szFreqLevels); + + if (!RTMpIsCpuOnline(idCpu)) + return 0; + + memset(szFreqLevels, 0, sizeof(szFreqLevels)); + + /* + * CPU 0 has the freq levels entry. ENOMEM is ok as we don't need all supported + * levels but only the first one. + */ + int rc = sysctlbyname("dev.cpu.0.freq_levels", szFreqLevels, &cbFreqLevels, NULL, 0); + if ( (rc && (errno != ENOMEM)) + || (cbFreqLevels == 0)) + return 0; + + /* Clear everything starting from the '/' */ + unsigned i = 0; + + do + { + if (szFreqLevels[i] == '/') + { + memset(&szFreqLevels[i], 0, sizeof(szFreqLevels) - i); + break; + } + i++; + } while (i < sizeof(szFreqLevels)); + + /* Returns 0 on failure. */ + return RTStrToUInt32(szFreqLevels); +} + |