VirtualBox

source: vbox/trunk/src/VBox/Runtime/generic/RTMpGetDescription-generic.cpp@ 93483

Last change on this file since 93483 was 93115, checked in by vboxsync, 3 years ago

scm --update-copyright-year

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 3.8 KB
Line 
1/* $Id: RTMpGetDescription-generic.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2/** @file
3 * IPRT - Multiprocessor, Generic RTMpGetDescription.
4 */
5
6/*
7 * Copyright (C) 2009-2022 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * The contents of this file may alternatively be used under the terms
18 * of the Common Development and Distribution License Version 1.0
19 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20 * VirtualBox OSE distribution, in which case the provisions of the
21 * CDDL are applicable instead of those of the GPL.
22 *
23 * You may elect to license modified versions of this file under the
24 * terms and conditions of either the GPL or the CDDL or both.
25 */
26
27
28/*********************************************************************************************************************************
29* Header Files *
30*********************************************************************************************************************************/
31#include <iprt/mp.h>
32#include "internal/iprt.h"
33#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
34# include <iprt/asm-amd64-x86.h>
35#endif
36#include <iprt/err.h>
37#include <iprt/string.h>
38
39
40
41/**
42 * Returns "Unknown" as description.
43 *
44 * @returns VERR_BUFFER_OVERFLOW or VINF_SUCCESS.
45 * @param pszBuf Output buffer.
46 * @param cbBuf Buffer size.
47 */
48static int rtMpGetDescriptionUnknown(char *pszBuf, size_t cbBuf)
49{
50 static const char s_szUnknown[] = "Unknown";
51 if (cbBuf < sizeof(s_szUnknown))
52 return VERR_BUFFER_OVERFLOW;
53 memcpy(pszBuf, s_szUnknown, sizeof(s_szUnknown));
54 return VINF_SUCCESS;
55}
56
57
58RTDECL(int) RTMpGetDescription(RTCPUID idCpu, char *pszBuf, size_t cbBuf)
59{
60 /*
61 * Check that the specified cpu is valid & online.
62 */
63 if (idCpu != NIL_RTCPUID && !RTMpIsCpuOnline(idCpu))
64 return RTMpIsCpuPossible(idCpu)
65 ? VERR_CPU_OFFLINE
66 : VERR_CPU_NOT_FOUND;
67
68 /*
69 * Construct the description string in a temporary buffer.
70 */
71 char szString[4*4*3+1];
72 RT_ZERO(szString);
73#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
74 if (!ASMHasCpuId())
75 return rtMpGetDescriptionUnknown(pszBuf, cbBuf);
76
77 uint32_t uMax;
78 uint32_t uEBX, uECX, uEDX;
79 ASMCpuId(0x80000000, &uMax, &uEBX, &uECX, &uEDX);
80 if (uMax >= 0x80000002)
81 {
82 ASMCpuId(0x80000002, &szString[0 + 0], &szString[0 + 4], &szString[0 + 8], &szString[0 + 12]);
83 if (uMax >= 0x80000003)
84 ASMCpuId(0x80000003, &szString[16 + 0], &szString[16 + 4], &szString[16 + 8], &szString[16 + 12]);
85 if (uMax >= 0x80000004)
86 ASMCpuId(0x80000004, &szString[32 + 0], &szString[32 + 4], &szString[32 + 8], &szString[32 + 12]);
87 }
88 else
89 {
90 ASMCpuId(0x00000000, &uMax, &uEBX, &uECX, &uEDX);
91 ((uint32_t *)&szString[0])[0] = uEBX;
92 ((uint32_t *)&szString[0])[1] = uEDX;
93 ((uint32_t *)&szString[0])[2] = uECX;
94 }
95
96#elif defined(RT_ARCH_ARM64)
97 RTCCINTREG uFreq;
98
99#else
100# error "PORTME or use RTMpGetDescription-generic-stub.cpp."
101#endif
102
103 /*
104 * Copy it out into the buffer supplied by the caller.
105 */
106 char *pszSrc = RTStrStrip(szString);
107 size_t cchSrc = strlen(pszSrc);
108 if (cchSrc >= cbBuf)
109 return VERR_BUFFER_OVERFLOW;
110 memcpy(pszBuf, pszSrc, cchSrc + 1);
111 return VINF_SUCCESS;
112}
113RT_EXPORT_SYMBOL(RTMpGetDescription);
114
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette