| 1 | /* $Id: RTMpGetDescription-win.cpp 109032 2025-04-21 00:44:58Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Multiprocessor, RTMpGetDescription, edition for newer Windows versions.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.215389.xyz.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <iprt/win/windows.h>
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| 42 | #include <iprt/mp.h>
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| 43 | #include "internal/iprt.h"
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| 44 |
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| 45 | #include <iprt/string.h>
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| 46 | #include <iprt/utf16.h>
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| 47 | #include <iprt/err.h>
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| 48 |
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| 49 |
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| 50 | RTDECL(int) RTMpGetDescription(RTCPUID idCpu, char *pszBuf, size_t cbBuf)
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| 51 | {
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| 52 | if (idCpu != NIL_RTCPUID && !RTMpIsCpuOnline(idCpu))
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| 53 | return RTMpIsCpuPossible(idCpu)
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| 54 | ? VERR_CPU_OFFLINE
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| 55 | : VERR_CPU_NOT_FOUND;
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| 56 |
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| 57 | /*
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| 58 | * Newer windows versions (at least 11), keeps info about the CPU in the
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| 59 | * registry.
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| 60 | *
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| 61 | * 'Get-WmiObject win32_processor' queries this information for instance
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| 62 | * (probably by way of cimwin32.dll and framedynos.dll).
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| 63 | */
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| 64 | HKEY hKeyCpuRoot = NULL;
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| 65 | LSTATUS lrc = RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor", 0 /* ulOptions*/,
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| 66 | KEY_ENUMERATE_SUB_KEYS | KEY_READ, &hKeyCpuRoot);
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| 67 | AssertMsg(lrc == ERROR_SUCCESS, ("lrc=%u\n", lrc));
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| 68 | if (lrc == ERROR_SUCCESS)
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| 69 | {
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| 70 | HKEY hKeyCpu = NULL;
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| 71 | if (idCpu == NIL_RTCPUID)
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| 72 | {
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| 73 | lrc = RegOpenKeyExW(hKeyCpuRoot, L"0", 0 /* ulOptions*/, KEY_ENUMERATE_SUB_KEYS | KEY_READ, &hKeyCpu);
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| 74 | AssertMsg(lrc == ERROR_SUCCESS, ("lrc=%u\n", lrc));
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| 75 | /** @todo if (lrc != ERROR_SUCCESS) enumerate subkeys */
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| 76 | }
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| 77 | else
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| 78 | {
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| 79 | WCHAR wszCpuNo[32];
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| 80 | RTUtf16Printf(wszCpuNo, RT_ELEMENTS(wszCpuNo), "%u", idCpu);
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| 81 | lrc = RegOpenKeyExW(hKeyCpuRoot, wszCpuNo, 0 /* ulOptions*/, KEY_ENUMERATE_SUB_KEYS | KEY_READ, &hKeyCpu);
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| 82 | AssertMsg(lrc == ERROR_SUCCESS, ("lrc=%u\n", lrc));
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| 83 | }
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| 84 | if (lrc == ERROR_SUCCESS)
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| 85 | {
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| 86 | WCHAR wszBuf[1536] = {0}; /* reasonable buffer size, right... */
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| 87 | DWORD dwType = REG_NONE;
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| 88 | DWORD cbData = sizeof(wszBuf) - sizeof(WCHAR);
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| 89 | lrc = RegQueryValueExW(hKeyCpu, L"ProcessorNameString", NULL /*lpReserved*/, &dwType, (PBYTE)&wszBuf[0], &cbData);
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| 90 | if (lrc == ERROR_SUCCESS)
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| 91 | {
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| 92 | if (dwType == REG_SZ)
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| 93 | {
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| 94 | if (cbBuf != 0 && pszBuf)
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| 95 | return RTUtf16ToUtf8Ex(wszBuf, cbData / sizeof(WCHAR), &pszBuf, cbBuf, NULL);
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| 96 | return VERR_BUFFER_OVERFLOW;
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| 97 | }
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| 98 | }
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | /* Fallback... */
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| 103 | return RTStrCopy(pszBuf, cbBuf, "Unknown");
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| 104 | }
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| 105 | RT_EXPORT_SYMBOL(RTMpGetDescription);
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| 106 |
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