VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/Support/testcase/tstInt.cpp

Last change on this file was 106061, checked in by vboxsync, 3 months ago

Copyright year updates by scm.
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1/* $Id: tstInt.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */
2/** @file
3 * SUP Testcase - Test the interrupt gate feature of the support library.
4 */
5
6/*
7 * Copyright (C) 2006-2024 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * The contents of this file may alternatively be used under the terms
26 * of the Common Development and Distribution License Version 1.0
27 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28 * in the VirtualBox distribution, in which case the provisions of the
29 * CDDL are applicable instead of those of the GPL.
30 *
31 * You may elect to license modified versions of this file under the
32 * terms and conditions of either the GPL or the CDDL or both.
33 *
34 * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35 */
36
37
38/*********************************************************************************************************************************
39* Header Files *
40*********************************************************************************************************************************/
41#include <VBox/sup.h>
42#include <VBox/vmm/vmm.h>
43#include <VBox/vmm/gvmm.h>
44#include <VBox/vmm/vm.h>
45#include <iprt/errcore.h>
46#include <VBox/param.h>
47#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
48# include <iprt/asm-amd64-x86.h>
49#else
50# define ASMReadTSC RTTimeSystemNanoTS
51#endif
52#include <iprt/initterm.h>
53#include <iprt/stream.h>
54#include <iprt/string.h>
55#include <iprt/alloc.h>
56#include <iprt/time.h>
57#include <iprt/path.h>
58
59
60int main(int argc, char **argv)
61{
62 int rcRet = 0;
63 int i;
64 int cIterations = argc > 1 ? RTStrToUInt32(argv[1]) : 32;
65 if (cIterations == 0)
66 cIterations = 64;
67
68 /*
69 * Init.
70 */
71 RTR3InitExe(argc, &argv, 0);
72 PSUPDRVSESSION pSession;
73 int rc = SUPR3Init(&pSession);
74 RTPrintf("tstInt: SUPR3Init -> rc=%Rrc\n", rc);
75 if (RT_FAILURE(rc))
76 return 1;
77
78 char szFile[RTPATH_MAX];
79 rc = RTPathExecDir(szFile, sizeof(szFile));
80 if (RT_SUCCESS(rc))
81 rc = RTPathAppend(szFile, sizeof(szFile), "VMMR0.r0");
82
83 char szAbsFile[RTPATH_MAX];
84 if (RT_SUCCESS(rc))
85 rc = RTPathAbs(szFile, szAbsFile, sizeof(szAbsFile));
86 if (RT_SUCCESS(rc))
87 {
88 /*
89 * Load VMM code.
90 */
91 RTERRINFOSTATIC ErrInfo;
92 rc = SUPR3LoadVMM(szAbsFile, RTErrInfoInitStatic(&ErrInfo));
93 if (RT_SUCCESS(rc))
94 {
95 /*
96 * Create a tiny dummy VM so we can do NOP calls into it using the fast I/O control path.
97 */
98 GVMMCREATEVMREQ CreateVMReq;
99 CreateVMReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
100 CreateVMReq.Hdr.cbReq = sizeof(CreateVMReq);
101 CreateVMReq.pSession = pSession;
102 CreateVMReq.pVMR0 = NIL_RTR0PTR;
103 CreateVMReq.pVMR3 = NULL;
104 CreateVMReq.cCpus = 1;
105 rc = SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_GVMM_CREATE_VM, 0, &CreateVMReq.Hdr);
106 if (RT_SUCCESS(rc))
107 {
108 PVM pVM = CreateVMReq.pVMR3;
109 AssertRelease(RT_VALID_PTR(pVM));
110 AssertRelease(pVM->pVMR0ForCall == CreateVMReq.pVMR0);
111 AssertRelease(pVM->pSession == pSession);
112 AssertRelease(pVM->cCpus == 1);
113 pVM->enmVMState = VMSTATE_CREATED;
114 PVMR0 const pVMR0 = CreateVMReq.pVMR0;
115
116 rc = SUPR3SetVMForFastIOCtl(pVMR0);
117 if (!rc)
118 {
119 /*
120 * Call VMM code with invalid function.
121 */
122 for (i = cIterations; i > 0; i--)
123 {
124 rc = SUPR3CallVMMR0(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, NULL);
125 if (rc != VINF_SUCCESS)
126 {
127 RTPrintf("tstInt: SUPR3CallVMMR0 -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
128 rcRet++;
129 break;
130 }
131 }
132 RTPrintf("tstInt: Performed SUPR3CallVMMR0 %d times (rc=%Rrc)\n", cIterations, rc);
133
134 /*
135 * The fast path.
136 */
137 if (rc == VINF_SUCCESS)
138 {
139 RTTimeNanoTS();
140 uint64_t StartTS = RTTimeNanoTS();
141 uint64_t StartTick = ASMReadTSC();
142 uint64_t MinTicks = UINT64_MAX;
143 for (i = 0; i < 1000000; i++)
144 {
145 uint64_t OneStartTick = ASMReadTSC();
146 rc = SUPR3CallVMMR0Fast(pVMR0, VMMR0_DO_NOP, 0);
147 uint64_t Ticks = ASMReadTSC() - OneStartTick;
148 if (Ticks < MinTicks)
149 MinTicks = Ticks;
150
151 if (RT_UNLIKELY(rc != VINF_SUCCESS))
152 {
153 RTPrintf("tstInt: SUPR3CallVMMR0Fast -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
154 rcRet++;
155 break;
156 }
157 }
158 uint64_t Ticks = ASMReadTSC() - StartTick;
159 uint64_t NanoSecs = RTTimeNanoTS() - StartTS;
160
161 RTPrintf("tstInt: SUPR3CallVMMR0Fast - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
162 i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
163
164 /*
165 * The ordinary path.
166 */
167 RTTimeNanoTS();
168 StartTS = RTTimeNanoTS();
169 StartTick = ASMReadTSC();
170 MinTicks = UINT64_MAX;
171 for (i = 0; i < 1000000; i++)
172 {
173 uint64_t OneStartTick = ASMReadTSC();
174 rc = SUPR3CallVMMR0Ex(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, 0, NULL);
175 uint64_t OneTicks = ASMReadTSC() - OneStartTick;
176 if (OneTicks < MinTicks)
177 MinTicks = OneTicks;
178
179 if (RT_UNLIKELY(rc != VINF_SUCCESS))
180 {
181 RTPrintf("tstInt: SUPR3CallVMMR0Ex -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
182 rcRet++;
183 break;
184 }
185 }
186 Ticks = ASMReadTSC() - StartTick;
187 NanoSecs = RTTimeNanoTS() - StartTS;
188
189 RTPrintf("tstInt: SUPR3CallVMMR0Ex - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
190 i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
191 }
192 }
193 else
194 {
195 RTPrintf("tstInt: SUPR3SetVMForFastIOCtl failed: %Rrc\n", rc);
196 rcRet++;
197 }
198
199 rc = SUPR3CallVMMR0Ex(pVMR0, 0 /*idCpu*/, VMMR0_DO_GVMM_DESTROY_VM, 0, NULL);
200 if (RT_FAILURE(rc))
201 {
202 RTPrintf("tstInt: VMMR0_DO_GVMM_DESTROY_VM failed: %Rrc\n", rc);
203 rcRet++;
204 }
205 }
206 else
207 {
208 RTPrintf("tstInt: VMMR0_DO_GVMM_CREATE_VM failed\n");
209 rcRet++;
210 }
211
212 /*
213 * Unload VMM.
214 */
215 rc = SUPR3UnloadVMM();
216 if (rc)
217 {
218 RTPrintf("tstInt: SUPR3UnloadVMM failed with rc=%Rrc\n", rc);
219 rcRet++;
220 }
221 }
222 else
223 {
224 RTPrintf("tstInt: SUPR3LoadVMM failed with rc=%Rrc%#RTeim\n", rc, &ErrInfo.Core);
225 rcRet++;
226 }
227
228 /*
229 * Terminate.
230 */
231 rc = SUPR3Term(false /*fForced*/);
232 rcRet += rc != 0;
233 RTPrintf("tstInt: SUPR3Term -> rc=%Rrc\n", rc);
234 }
235 else
236 {
237 RTPrintf("tstInt: Failed to construct VMMR0.r0 path: %Rrc\n", rc);
238 rcRet++;
239 }
240
241 return rcRet;
242}
243
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