| 1 | /** $Id: tstInt.cpp 4829 2007-09-15 21:55:14Z vboxsync $ */
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| 2 | /** @file
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| 3 | * 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) 2006-2007 innotek GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*******************************************************************************
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| 20 | * Header Files *
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| 21 | *******************************************************************************/
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| 22 | #include <VBox/sup.h>
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| 23 | #include <VBox/vm.h>
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| 24 | #include <VBox/vmm.h>
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| 25 | #include <VBox/err.h>
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| 26 | #include <VBox/param.h>
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| 27 | #include <iprt/runtime.h>
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| 28 | #include <iprt/stream.h>
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| 29 | #include <iprt/string.h>
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| 30 |
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| 31 |
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| 32 | /**
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| 33 | * Makes a path to a file in the executable directory.
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| 34 | */
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| 35 | static char *ExeDirFile(char *pszFile, const char *pszArgv0, const char *pszFilename)
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| 36 | {
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| 37 | char *psz;
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| 38 | char *psz2;
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| 39 |
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| 40 | strcpy(pszFile, pszArgv0);
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| 41 | psz = strrchr(pszFile, '/');
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| 42 | psz2 = strrchr(pszFile, '\\');
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| 43 | if (psz < psz2)
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| 44 | psz = psz2;
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| 45 | if (!psz)
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| 46 | psz = strrchr(pszFile, ':');
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| 47 | if (!psz)
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| 48 | {
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| 49 | strcpy(pszFile, "./");
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| 50 | psz = &pszFile[1];
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| 51 | }
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| 52 | strcpy(psz + 1, "VMMR0.r0");
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| 53 | return pszFile;
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| 54 | }
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| 55 |
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| 56 | int main(int argc, char **argv)
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| 57 | {
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| 58 | int rcRet = 0;
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| 59 | int i;
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| 60 | int rc;
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| 61 | int cIterations = argc > 1 ? RTStrToUInt32(argv[1]) : 32;
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| 62 | if (cIterations == 0)
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| 63 | cIterations = 64;
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| 64 |
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| 65 | /*
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| 66 | * Init.
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| 67 | */
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| 68 | RTR3Init();
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| 69 | PSUPDRVSESSION pSession;
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| 70 | rc = SUPInit(&pSession);
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| 71 | rcRet += rc != 0;
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| 72 | RTPrintf("tstInt: SUPInit -> rc=%Vrc\n", rc);
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| 73 | if (!rc)
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| 74 | {
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| 75 | /*
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| 76 | * Load VMM code.
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| 77 | */
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| 78 | char szFile[RTPATH_MAX];
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| 79 | rc = SUPLoadVMM(ExeDirFile(szFile, argv[0], "VMMR0.r0"));
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| 80 | if (!rc)
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| 81 | {
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| 82 | /*
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| 83 | * Create a fake 'VM'.
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| 84 | */
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| 85 | PVMR0 pVMR0 = NIL_RTR0PTR;
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| 86 | PVM pVM = NULL;
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| 87 | const unsigned cPages = RT_ALIGN_Z(sizeof(*pVM), PAGE_SIZE) >> PAGE_SHIFT;
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| 88 | PSUPPAGE paPages = (PSUPPAGE)RTMemAllocZ(cPages * sizeof(SUPPAGE));
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| 89 | if (paPages)
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| 90 | rc = SUPLowAlloc(cPages, (void **)&pVM, &pVMR0, &paPages[0]);
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| 91 | else
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| 92 | rc = VERR_NO_MEMORY;
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| 93 | if (VBOX_SUCCESS(rc))
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| 94 | {
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| 95 | pVM->pVMGC = 0;
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| 96 | pVM->pVMR3 = pVM;
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| 97 | pVM->pVMR0 = pVMR0;
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| 98 | pVM->paVMPagesR3 = paPages;
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| 99 | pVM->pSession = pSession;
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| 100 |
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| 101 | rc = SUPSetVMForFastIOCtl(pVMR0);
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| 102 | if (!rc)
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| 103 | {
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| 104 |
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| 105 | /*
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| 106 | * Call VMM code with invalid function.
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| 107 | */
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| 108 | for (i = cIterations; i > 0; i--)
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| 109 | {
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| 110 | rc = SUPCallVMMR0(pVMR0, VMMR0_DO_NOP, NULL);
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| 111 | if (rc != VINF_SUCCESS)
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| 112 | {
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| 113 | RTPrintf("tstInt: SUPCallVMMR0 -> rc=%Vrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 114 | rcRet++;
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| 115 | break;
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| 116 | }
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| 117 | }
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| 118 | RTPrintf("tstInt: Performed SUPCallVMMR0 %d times (rc=%Vrc)\n", cIterations, rc);
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| 119 |
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| 120 | /*
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| 121 | * Profile it.
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| 122 | */
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| 123 | if (!rc)
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| 124 | {
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| 125 | RTTimeNanoTS();
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| 126 | uint64_t StartTS = RTTimeNanoTS();
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| 127 | uint64_t StartTick = ASMReadTSC();
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| 128 | uint64_t MinTicks = UINT64_MAX;
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| 129 | for (i = 0; i < 1000000; i++)
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| 130 | {
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| 131 | uint64_t OneStartTick = ASMReadTSC();
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| 132 | rc = SUPCallVMMR0(pVMR0, VMMR0_DO_NOP, NULL);
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| 133 | uint64_t Ticks = ASMReadTSC() - OneStartTick;
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| 134 | if (Ticks < MinTicks)
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| 135 | MinTicks = Ticks;
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| 136 |
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| 137 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
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| 138 | {
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| 139 | RTPrintf("tstInt: SUPCallVMMR0 -> rc=%Vrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 140 | rcRet++;
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| 141 | break;
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| 142 | }
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| 143 | }
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| 144 | uint64_t Ticks = ASMReadTSC() - StartTick;
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| 145 | uint64_t NanoSecs = RTTimeNanoTS() - StartTS;
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| 146 |
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| 147 | RTPrintf("tstInt: SUPCallVMMR0 - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
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| 148 | i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
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| 149 |
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| 150 | #ifdef VBOX_WITH_IDT_PATCHING
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| 151 | /*
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| 152 | * The fast path.
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| 153 | */
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| 154 | RTTimeNanoTS();
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| 155 | StartTS = RTTimeNanoTS();
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| 156 | StartTick = ASMReadTSC();
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| 157 | MinTicks = UINT64_MAX;
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| 158 | for (i = 0; i < 1000000; i++)
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| 159 | {
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| 160 | uint64_t OneStartTick = ASMReadTSC();
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| 161 | rc = SUPCallVMMR0Fast(pVMR0, VMMR0_DO_NOP);
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| 162 | uint64_t Ticks = ASMReadTSC() - OneStartTick;
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| 163 | if (Ticks < MinTicks)
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| 164 | MinTicks = Ticks;
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| 165 |
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| 166 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
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| 167 | {
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| 168 | RTPrintf("tstInt: SUPCallVMMR0 -> rc=%Vrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 169 | rcRet++;
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| 170 | break;
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| 171 | }
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| 172 | }
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| 173 | Ticks = ASMReadTSC() - StartTick;
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| 174 | NanoSecs = RTTimeNanoTS() - StartTS;
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| 175 |
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| 176 | RTPrintf("tstInt: SUPCallVMMR0Fast - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
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| 177 | i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
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| 178 | #endif /* VBOX_WITH_IDT_PATCHING */
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| 179 |
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| 180 | /*
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| 181 | * The ordinary path.
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| 182 | */
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| 183 | RTTimeNanoTS();
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| 184 | StartTS = RTTimeNanoTS();
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| 185 | StartTick = ASMReadTSC();
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| 186 | MinTicks = UINT64_MAX;
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| 187 | for (i = 0; i < 1000000; i++)
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| 188 | {
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| 189 | uint64_t OneStartTick = ASMReadTSC();
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| 190 | rc = SUPCallVMMR0Ex(pVMR0, VMMR0_DO_NOP, 0, NULL);
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| 191 | uint64_t Ticks = ASMReadTSC() - OneStartTick;
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| 192 | if (Ticks < MinTicks)
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| 193 | MinTicks = Ticks;
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| 194 |
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| 195 | if (RT_UNLIKELY(rc != VINF_SUCCESS))
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| 196 | {
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| 197 | RTPrintf("tstInt: SUPCallVMMR0 -> rc=%Vrc i=%d Expected VINF_SUCCESS!\n", rc, i);
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| 198 | rcRet++;
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| 199 | break;
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| 200 | }
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| 201 | }
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| 202 | Ticks = ASMReadTSC() - StartTick;
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| 203 | NanoSecs = RTTimeNanoTS() - StartTS;
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| 204 |
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| 205 | RTPrintf("tstInt: SUPCallVMMR0Ex - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
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| 206 | i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
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| 207 | }
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| 208 | }
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| 209 | else
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| 210 | {
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| 211 | RTPrintf("tstInt: SUPSetVMForFastIOCtl failed: %Vrc\n", rc);
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| 212 | rcRet++;
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| 213 | }
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| 214 | }
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| 215 | else
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| 216 | {
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| 217 | RTPrintf("tstInt: SUPContAlloc2(%#zx,,) failed\n", sizeof(*pVM));
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| 218 | rcRet++;
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| 219 | }
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| 220 |
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| 221 | /*
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| 222 | * Unload VMM.
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| 223 | */
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| 224 | rc = SUPUnloadVMM();
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| 225 | if (rc)
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| 226 | {
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| 227 | RTPrintf("tstInt: SUPUnloadVMM failed with rc=%Vrc\n", rc);
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| 228 | rcRet++;
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| 229 | }
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| 230 | }
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| 231 | else
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| 232 | {
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| 233 | RTPrintf("tstInt: SUPLoadVMM failed with rc=%Vrc\n", rc);
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| 234 | rcRet++;
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| 235 | }
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| 236 |
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| 237 | /*
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| 238 | * Terminate.
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| 239 | */
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| 240 | rc = SUPTerm();
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| 241 | rcRet += rc != 0;
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| 242 | RTPrintf("tstInt: SUPTerm -> rc=%Vrc\n", rc);
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| 243 | }
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| 244 |
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| 245 | return !!rc;
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| 246 | }
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| 247 |
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