| 1 | /* $Id: tstInt.cpp 103432 2024-02-19 12:08:00Z vboxsync $ */
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| 2 | /** @file
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| 3 | * SUP Testcase - Test the interrupt gate feature of the support library.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #include <VBox/sup.h>
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| 42 | #include <VBox/vmm/vmm.h>
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| 43 | #include <VBox/vmm/gvmm.h>
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| 44 | #include <VBox/vmm/vm.h>
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| 45 | #include <iprt/errcore.h>
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| 46 | #include <VBox/param.h>
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| 47 | #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
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| 48 | # include <iprt/asm-amd64-x86.h>
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| 49 | #else
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| 50 | # define ASMReadTSC RTTimeSystemNanoTS
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| 51 | #endif
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| 52 | #include <iprt/initterm.h>
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| 53 | #include <iprt/stream.h>
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| 54 | #include <iprt/string.h>
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| 55 | #include <iprt/alloc.h>
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| 56 | #include <iprt/time.h>
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| 57 | #include <iprt/path.h>
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| 58 |
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| 59 |
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| 60 | int main(int argc, char **argv)
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| 61 | {
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| 62 | int rcRet = 0;
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| 63 | int i;
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| 64 | int cIterations = argc > 1 ? RTStrToUInt32(argv[1]) : 32;
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| 65 | if (cIterations == 0)
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| 66 | cIterations = 64;
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| 67 |
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| 68 | /*
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| 69 | * Init.
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| 70 | */
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| 71 | RTR3InitExe(argc, &argv, 0);
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| 72 | PSUPDRVSESSION pSession;
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| 73 | int rc = SUPR3Init(&pSession);
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| 74 | RTPrintf("tstInt: SUPR3Init -> rc=%Rrc\n", rc);
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| 75 | if (RT_FAILURE(rc))
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| 76 | return 1;
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| 77 |
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| 78 | char szFile[RTPATH_MAX];
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| 79 | rc = RTPathExecDir(szFile, sizeof(szFile));
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| 80 | if (RT_SUCCESS(rc))
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| 81 | rc = RTPathAppend(szFile, sizeof(szFile), "VMMR0.r0");
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| 82 |
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| 83 | char szAbsFile[RTPATH_MAX];
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| 84 | if (RT_SUCCESS(rc))
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| 85 | rc = RTPathAbs(szFile, szAbsFile, sizeof(szAbsFile));
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| 86 | if (RT_SUCCESS(rc))
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| 87 | {
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| 88 | /*
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| 89 | * Load VMM code.
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| 90 | */
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| 91 | RTERRINFOSTATIC ErrInfo;
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| 92 | rc = SUPR3LoadVMM(szAbsFile, RTErrInfoInitStatic(&ErrInfo));
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| 93 | if (RT_SUCCESS(rc))
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| 94 | {
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| 95 | /*
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| 96 | * Create a tiny dummy VM so we can do NOP calls into it using the fast I/O control path.
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| 97 | */
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| 98 | GVMMCREATEVMREQ CreateVMReq;
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| 99 | CreateVMReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
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| 100 | CreateVMReq.Hdr.cbReq = sizeof(CreateVMReq);
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| 101 | CreateVMReq.pSession = pSession;
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| 102 | CreateVMReq.pVMR0 = NIL_RTR0PTR;
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| 103 | CreateVMReq.pVMR3 = NULL;
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| 104 | CreateVMReq.cCpus = 1;
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| 105 | rc = SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_GVMM_CREATE_VM, 0, &CreateVMReq.Hdr);
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| 106 | if (RT_SUCCESS(rc))
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| 107 | {
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| 108 | PVM pVM = CreateVMReq.pVMR3;
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| 109 | AssertRelease(RT_VALID_PTR(pVM));
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| 110 | AssertRelease(pVM->pVMR0ForCall == CreateVMReq.pVMR0);
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| 111 | AssertRelease(pVM->pSession == pSession);
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| 112 | AssertRelease(pVM->cCpus == 1);
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| 113 | pVM->enmVMState = VMSTATE_CREATED;
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| 114 | PVMR0 const pVMR0 = CreateVMReq.pVMR0;
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| 115 |
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| 116 | rc = SUPR3SetVMForFastIOCtl(pVMR0);
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| 117 | if (!rc)
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| 118 | {
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| 119 | /*
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| 120 | * Call VMM code with invalid function.
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| 121 | */
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| 122 | for (i = cIterations; i > 0; i--)
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| 123 | {
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| 124 | rc = SUPR3CallVMMR0(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, NULL);
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| 125 | if (rc != VINF_SUCCESS)
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| 126 | {
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| 127 | RTPrintf("tstInt: SUPR3CallVMMR0 -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 128 | rcRet++;
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| 129 | break;
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| 130 | }
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| 131 | }
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| 132 | RTPrintf("tstInt: Performed SUPR3CallVMMR0 %d times (rc=%Rrc)\n", cIterations, rc);
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| 133 |
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| 134 | /*
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| 135 | * The fast path.
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| 136 | */
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| 137 | if (rc == VINF_SUCCESS)
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| 138 | {
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| 139 | RTTimeNanoTS();
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| 140 | uint64_t StartTS = RTTimeNanoTS();
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| 141 | uint64_t StartTick = ASMReadTSC();
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| 142 | uint64_t MinTicks = UINT64_MAX;
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| 143 | for (i = 0; i < 1000000; i++)
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| 144 | {
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| 145 | uint64_t OneStartTick = ASMReadTSC();
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| 146 | rc = SUPR3CallVMMR0Fast(pVMR0, VMMR0_DO_NOP, 0);
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| 147 | uint64_t Ticks = ASMReadTSC() - OneStartTick;
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| 148 | if (Ticks < MinTicks)
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| 149 | MinTicks = Ticks;
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| 150 |
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| 151 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
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| 152 | {
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| 153 | RTPrintf("tstInt: SUPR3CallVMMR0Fast -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 154 | rcRet++;
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| 155 | break;
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| 156 | }
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| 157 | }
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| 158 | uint64_t Ticks = ASMReadTSC() - StartTick;
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| 159 | uint64_t NanoSecs = RTTimeNanoTS() - StartTS;
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| 160 |
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| 161 | RTPrintf("tstInt: SUPR3CallVMMR0Fast - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
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| 162 | i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
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| 163 |
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| 164 | /*
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| 165 | * The ordinary path.
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| 166 | */
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| 167 | RTTimeNanoTS();
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| 168 | StartTS = RTTimeNanoTS();
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| 169 | StartTick = ASMReadTSC();
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| 170 | MinTicks = UINT64_MAX;
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| 171 | for (i = 0; i < 1000000; i++)
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| 172 | {
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| 173 | uint64_t OneStartTick = ASMReadTSC();
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| 174 | rc = SUPR3CallVMMR0Ex(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, 0, NULL);
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| 175 | uint64_t OneTicks = ASMReadTSC() - OneStartTick;
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| 176 | if (OneTicks < MinTicks)
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| 177 | MinTicks = OneTicks;
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| 178 |
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| 179 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
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| 180 | {
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| 181 | RTPrintf("tstInt: SUPR3CallVMMR0Ex -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 182 | rcRet++;
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| 183 | break;
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| 184 | }
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| 185 | }
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| 186 | Ticks = ASMReadTSC() - StartTick;
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| 187 | NanoSecs = RTTimeNanoTS() - StartTS;
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| 188 |
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| 189 | RTPrintf("tstInt: SUPR3CallVMMR0Ex - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
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| 190 | i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
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| 191 | }
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| 192 | }
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| 193 | else
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| 194 | {
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| 195 | RTPrintf("tstInt: SUPR3SetVMForFastIOCtl failed: %Rrc\n", rc);
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| 196 | rcRet++;
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| 197 | }
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| 198 |
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| 199 | rc = SUPR3CallVMMR0Ex(pVMR0, 0 /*idCpu*/, VMMR0_DO_GVMM_DESTROY_VM, 0, NULL);
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| 200 | if (RT_FAILURE(rc))
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| 201 | {
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| 202 | RTPrintf("tstInt: VMMR0_DO_GVMM_DESTROY_VM failed: %Rrc\n", rc);
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| 203 | rcRet++;
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| 204 | }
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| 205 | }
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| 206 | else
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| 207 | {
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| 208 | RTPrintf("tstInt: VMMR0_DO_GVMM_CREATE_VM failed\n");
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| 209 | rcRet++;
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| 210 | }
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| 211 |
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| 212 | /*
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| 213 | * Unload VMM.
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| 214 | */
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| 215 | rc = SUPR3UnloadVMM();
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| 216 | if (rc)
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| 217 | {
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| 218 | RTPrintf("tstInt: SUPR3UnloadVMM failed with rc=%Rrc\n", rc);
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| 219 | rcRet++;
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| 220 | }
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| 221 | }
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| 222 | else
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| 223 | {
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| 224 | RTPrintf("tstInt: SUPR3LoadVMM failed with rc=%Rrc%#RTeim\n", rc, &ErrInfo.Core);
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| 225 | rcRet++;
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| 226 | }
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| 227 |
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| 228 | /*
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| 229 | * Terminate.
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| 230 | */
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| 231 | rc = SUPR3Term(false /*fForced*/);
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| 232 | rcRet += rc != 0;
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| 233 | RTPrintf("tstInt: SUPR3Term -> rc=%Rrc\n", rc);
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| 234 | }
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| 235 | else
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| 236 | {
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| 237 | RTPrintf("tstInt: Failed to construct VMMR0.r0 path: %Rrc\n", rc);
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| 238 | rcRet++;
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| 239 | }
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| 240 |
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| 241 | return rcRet;
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| 242 | }
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| 243 |
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