blob: f0252a501fdf404ee45f12fc341cd503e8185682 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/* $Id: VBoxCpuReportMsrSup.cpp $ */
/** @file
* MsrSup - SupDrv-specific MSR access.
*/
/*
* Copyright (C) 2013-2022 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>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "VBoxCpuReport.h"
#include <iprt/errcore.h>
#include <iprt/x86.h>
int VbCpuRepMsrProberInitSupDrv(PVBCPUREPMSRACCESSORS pMsrFunctions)
{
int rc = SUPR3Init(NULL);
if (RT_SUCCESS(rc))
{
/* Test if the MSR prober is available, since the interface is optional. The TSC MSR will exist on any supported CPU. */
uint64_t uValue;
bool fGp;
rc = SUPR3MsrProberRead(MSR_IA32_TSC, NIL_RTCPUID, &uValue, &fGp);
if ( rc != VERR_NOT_IMPLEMENTED
&& rc != VERR_INVALID_FUNCTION)
{
pMsrFunctions->fAtomic = true;
pMsrFunctions->pfnMsrProberRead = SUPR3MsrProberRead;
pMsrFunctions->pfnMsrProberWrite = SUPR3MsrProberWrite;
pMsrFunctions->pfnMsrProberModify = SUPR3MsrProberModify;
pMsrFunctions->pfnTerm = NULL;
return VINF_SUCCESS;
}
vbCpuRepDebug("warning: MSR probing not supported by the support driver (%Rrc).\n", rc);
}
else
vbCpuRepDebug("warning: Unable to initialize the support library (%Rrc).\n", rc);
return rc;
}
|
