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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/* $Id: mpnotification-r0drv-solaris.c $ */
/** @file
* IPRT - Multiprocessor Event Notifications, Ring-0 Driver, Solaris.
*/
/*
* 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 *
*********************************************************************************************************************************/
#include "the-solaris-kernel.h"
#include "internal/iprt.h"
#include <iprt/errcore.h>
#include <iprt/mp.h>
#include <iprt/cpuset.h>
#include <iprt/string.h>
#include <iprt/thread.h>
#include "r0drv/mp-r0drv.h"
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** Whether CPUs are being watched or not. */
static volatile bool g_fSolCpuWatch = false;
/** Set of online cpus that is maintained by the MP callback.
* This avoids locking issues querying the set from the kernel as well as
* eliminating any uncertainty regarding the online status during the
* callback. */
RTCPUSET g_rtMpSolCpuSet;
/**
* Internal solaris representation for watching CPUs.
*/
typedef struct RTMPSOLWATCHCPUS
{
/** Function pointer to Mp worker. */
PFNRTMPWORKER pfnWorker;
/** Argument to pass to the Mp worker. */
void *pvArg;
} RTMPSOLWATCHCPUS;
typedef RTMPSOLWATCHCPUS *PRTMPSOLWATCHCPUS;
/**
* Solaris callback function for Mp event notification.
*
* @returns Solaris error code.
* @param CpuState The current event/state of the CPU.
* @param iCpu Which CPU is this event for.
* @param pvArg Ignored.
*
* @remarks This function assumes index == RTCPUID.
* We may -not- be firing on the CPU going online/offline and called
* with preemption enabled.
*/
static int rtMpNotificationCpuEvent(cpu_setup_t CpuState, int iCpu, void *pvArg)
{
RTMPEVENT enmMpEvent;
/*
* Update our CPU set structures first regardless of whether we've been
* scheduled on the right CPU or not, this is just atomic accounting.
*/
if (CpuState == CPU_ON)
{
enmMpEvent = RTMPEVENT_ONLINE;
RTCpuSetAdd(&g_rtMpSolCpuSet, iCpu);
}
else if (CpuState == CPU_OFF)
{
enmMpEvent = RTMPEVENT_OFFLINE;
RTCpuSetDel(&g_rtMpSolCpuSet, iCpu);
}
else
return 0;
rtMpNotificationDoCallbacks(enmMpEvent, iCpu);
NOREF(pvArg);
return 0;
}
DECLHIDDEN(int) rtR0MpNotificationNativeInit(void)
{
if (ASMAtomicReadBool(&g_fSolCpuWatch) == true)
return VERR_WRONG_ORDER;
/*
* Register the callback building the online cpu set as we do so.
*/
RTCpuSetEmpty(&g_rtMpSolCpuSet);
mutex_enter(&cpu_lock);
register_cpu_setup_func(rtMpNotificationCpuEvent, NULL /* pvArg */);
for (int i = 0; i < (int)RTMpGetCount(); ++i)
if (cpu_is_online(cpu[i]))
rtMpNotificationCpuEvent(CPU_ON, i, NULL /* pvArg */);
ASMAtomicWriteBool(&g_fSolCpuWatch, true);
mutex_exit(&cpu_lock);
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0MpNotificationNativeTerm(void)
{
if (ASMAtomicReadBool(&g_fSolCpuWatch) == true)
{
mutex_enter(&cpu_lock);
unregister_cpu_setup_func(rtMpNotificationCpuEvent, NULL /* pvArg */);
ASMAtomicWriteBool(&g_fSolCpuWatch, false);
mutex_exit(&cpu_lock);
}
}
|
