| 1 | /* $Id: RTMpGetDescription-generic.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Multiprocessor, Generic RTMpGetDescription.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2009-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #include <iprt/mp.h>
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| 32 | #include "internal/iprt.h"
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| 33 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 34 | # include <iprt/asm-amd64-x86.h>
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| 35 | #endif
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| 36 | #include <iprt/err.h>
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| 37 | #include <iprt/string.h>
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| 38 |
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| 39 |
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| 40 |
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| 41 | /**
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| 42 | * Returns "Unknown" as description.
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| 43 | *
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| 44 | * @returns VERR_BUFFER_OVERFLOW or VINF_SUCCESS.
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| 45 | * @param pszBuf Output buffer.
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| 46 | * @param cbBuf Buffer size.
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| 47 | */
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| 48 | static int rtMpGetDescriptionUnknown(char *pszBuf, size_t cbBuf)
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| 49 | {
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| 50 | static const char s_szUnknown[] = "Unknown";
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| 51 | if (cbBuf < sizeof(s_szUnknown))
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| 52 | return VERR_BUFFER_OVERFLOW;
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| 53 | memcpy(pszBuf, s_szUnknown, sizeof(s_szUnknown));
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| 54 | return VINF_SUCCESS;
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| 55 | }
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| 56 |
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| 57 |
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| 58 | RTDECL(int) RTMpGetDescription(RTCPUID idCpu, char *pszBuf, size_t cbBuf)
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| 59 | {
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| 60 | /*
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| 61 | * Check that the specified cpu is valid & online.
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| 62 | */
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| 63 | if (idCpu != NIL_RTCPUID && !RTMpIsCpuOnline(idCpu))
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| 64 | return RTMpIsCpuPossible(idCpu)
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| 65 | ? VERR_CPU_OFFLINE
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| 66 | : VERR_CPU_NOT_FOUND;
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| 67 |
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| 68 | /*
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| 69 | * Construct the description string in a temporary buffer.
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| 70 | */
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| 71 | char szString[4*4*3+1];
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| 72 | RT_ZERO(szString);
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| 73 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 74 | if (!ASMHasCpuId())
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| 75 | return rtMpGetDescriptionUnknown(pszBuf, cbBuf);
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| 76 |
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| 77 | uint32_t uMax;
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| 78 | uint32_t uEBX, uECX, uEDX;
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| 79 | ASMCpuId(0x80000000, &uMax, &uEBX, &uECX, &uEDX);
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| 80 | if (uMax >= 0x80000002)
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| 81 | {
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| 82 | ASMCpuId(0x80000002, &szString[0 + 0], &szString[0 + 4], &szString[0 + 8], &szString[0 + 12]);
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| 83 | if (uMax >= 0x80000003)
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| 84 | ASMCpuId(0x80000003, &szString[16 + 0], &szString[16 + 4], &szString[16 + 8], &szString[16 + 12]);
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| 85 | if (uMax >= 0x80000004)
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| 86 | ASMCpuId(0x80000004, &szString[32 + 0], &szString[32 + 4], &szString[32 + 8], &szString[32 + 12]);
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| 87 | }
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| 88 | else
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| 89 | {
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| 90 | ASMCpuId(0x00000000, &uMax, &uEBX, &uECX, &uEDX);
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| 91 | ((uint32_t *)&szString[0])[0] = uEBX;
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| 92 | ((uint32_t *)&szString[0])[1] = uEDX;
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| 93 | ((uint32_t *)&szString[0])[2] = uECX;
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| 94 | }
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| 95 |
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| 96 | #else
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| 97 | # error "PORTME or use RTMpGetDescription-generic-stub.cpp."
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| 98 | #endif
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| 99 |
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| 100 | /*
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| 101 | * Copy it out into the buffer supplied by the caller.
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| 102 | */
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| 103 | char *pszSrc = RTStrStrip(szString);
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| 104 | size_t cchSrc = strlen(pszSrc);
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| 105 | if (cchSrc >= cbBuf)
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| 106 | return VERR_BUFFER_OVERFLOW;
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| 107 | memcpy(pszBuf, pszSrc, cchSrc + 1);
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| 108 | return VINF_SUCCESS;
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| 109 | }
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| 110 | RT_EXPORT_SYMBOL(RTMpGetDescription);
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| 111 |
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