| 1 | /* $Id: VMMGC.cpp 23 2007-01-15 14:08:28Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VMM - Guest Context.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006 InnoTek Systemberatung 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 | * If you received this file as part of a commercial VirtualBox
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| 18 | * distribution, then only the terms of your commercial VirtualBox
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| 19 | * license agreement apply instead of the previous paragraph.
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| 20 | */
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| 21 |
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| 22 |
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| 23 | /*******************************************************************************
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| 24 | * Header Files *
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| 25 | *******************************************************************************/
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| 26 | #define LOG_GROUP LOG_GROUP_VMM
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| 27 | #include <VBox/vmm.h>
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| 28 | #include "VMMInternal.h"
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| 29 | #include <VBox/vm.h>
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| 30 | #include <VBox/err.h>
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| 31 | #include <VBox/log.h>
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| 32 | #include <iprt/asm.h>
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| 33 | #include <iprt/assert.h>
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| 34 |
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| 35 |
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| 36 | /*******************************************************************************
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| 37 | * Global Variables *
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| 38 | *******************************************************************************/
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| 39 | /** Default logger instance. */
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| 40 | extern "C" DECLIMPORT(RTLOGGERGC) g_Logger;
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| 41 | extern "C" DECLIMPORT(RTLOGGERGC) g_RelLogger;
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| 42 |
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| 43 |
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| 44 | /*******************************************************************************
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| 45 | * Internal Functions *
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| 46 | *******************************************************************************/
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| 47 | static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg);
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| 48 |
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| 49 |
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| 50 |
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| 51 | /**
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| 52 | * The GC entry point.
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| 53 | *
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| 54 | * @returns VBox status code.
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| 55 | * @param pVM The VM to operate on.
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| 56 | * @param uOperation Which operation to execute (VMMGCOPERATION).
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| 57 | * @param uArg Argument to that operation.
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| 58 | */
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| 59 | VMMGCDECL(int) VMMGCEntry(PVM pVM, unsigned uOperation, unsigned uArg)
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| 60 | {
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| 61 | /* todo */
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| 62 | switch (uOperation)
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| 63 | {
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| 64 | /*
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| 65 | * Init GC modules.
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| 66 | */
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| 67 | case VMMGC_DO_VMMGC_INIT:
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| 68 | {
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| 69 | Log(("VMMGCEntry: VMMGC_DO_VMMGC_INIT - uArg=%#x\n", uArg));
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| 70 | /** @todo validate version. */
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| 71 | return VINF_SUCCESS;
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| 72 | }
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| 73 |
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| 74 | /*
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| 75 | * Testcase which is used to test interrupt forwarding.
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| 76 | * It spins for a while with interrupts enabled.
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| 77 | */
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| 78 | case VMMGC_DO_TESTCASE_HYPER_INTERRUPT:
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| 79 | {
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| 80 | ASMIntEnable();
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| 81 | int i = 0;
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| 82 | while (i + 1 > i)
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| 83 | i++;
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| 84 | ASMIntDisable();
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| 85 | return 0;
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| 86 | }
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| 87 |
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| 88 | /*
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| 89 | * Testcase which simply returns, this is used for
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| 90 | * profiling of the switcher.
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| 91 | */
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| 92 | case VMMGC_DO_TESTCASE_NOP:
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| 93 | return 0;
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| 94 |
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| 95 | /*
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| 96 | * Trap testcases and unknown operations.
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| 97 | */
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| 98 | default:
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| 99 | if ( uOperation >= VMMGC_DO_TESTCASE_TRAP_FIRST
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| 100 | && uOperation < VMMGC_DO_TESTCASE_TRAP_LAST)
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| 101 | return vmmGCTest(pVM, uOperation, uArg);
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| 102 | return VERR_INVALID_PARAMETER;
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| 103 | }
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| 104 | }
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| 105 |
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| 106 |
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| 107 | /**
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| 108 | * Internal GC logger worker: Flush logger.
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| 109 | *
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| 110 | * @returns VINF_SUCCESS.
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| 111 | * @param pLogger The logger instance to flush.
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| 112 | * @remark This function must be exported!
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| 113 | */
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| 114 | VMMGCDECL(int) vmmGCLoggerFlush(PRTLOGGERGC pLogger)
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| 115 | {
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| 116 | PVM pVM = &g_VM;
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| 117 | NOREF(pLogger);
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| 118 | return VMMGCCallHost(pVM, VMMCALLHOST_VMM_LOGGER_FLUSH, 0);
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| 119 | }
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| 120 |
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| 121 |
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| 122 | /**
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| 123 | * Switches from guest context to host context.
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| 124 | *
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| 125 | * @param pVM The VM handle.
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| 126 | * @param rc The status code.
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| 127 | */
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| 128 | VMMGCDECL(void) VMMGCGuestToHost(PVM pVM, int rc)
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| 129 | {
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| 130 | pVM->vmm.s.pfnGCGuestToHost(rc);
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| 131 | }
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| 132 |
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| 133 |
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| 134 | /**
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| 135 | * Calls the ring-3 host code.
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| 136 | *
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| 137 | * @returns VBox status code of the ring-3 call.
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| 138 | * @param pVM The VM handle.
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| 139 | * @param enmOperation The operation.
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| 140 | * @param uArg The argument to the operation.
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| 141 | */
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| 142 | VMMGCDECL(int) VMMGCCallHost(PVM pVM, VMMCALLHOST enmOperation, uint64_t uArg)
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| 143 | {
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| 144 | /** @todo profile this! */
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| 145 | pVM->vmm.s.enmCallHostOperation = enmOperation;
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| 146 | pVM->vmm.s.u64CallHostArg = uArg;
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| 147 | pVM->vmm.s.rcCallHost = VERR_INTERNAL_ERROR;
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| 148 | pVM->vmm.s.pfnGCGuestToHost(VINF_VMM_CALL_HOST);
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| 149 | return pVM->vmm.s.rcCallHost;
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| 150 | }
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| 151 |
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| 152 |
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| 153 | /**
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| 154 | * Execute the trap testcase.
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| 155 | *
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| 156 | * There is some common code here, that's why we're collecting them
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| 157 | * like this. Odd numbered variation (uArg) are executed with write
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| 158 | * protection (WP) enabled.
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| 159 | *
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| 160 | * @returns VINF_SUCCESS if it was a testcase setup up to continue and did so successfully.
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| 161 | * @returns VERR_NOT_IMPLEMENTED if the testcase wasn't implemented.
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| 162 | * @returns VERR_GENERAL_FAILURE if the testcase continued when it shouldn't.
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| 163 | *
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| 164 | * @param pVM The VM handle.
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| 165 | * @param uOperation The testcase.
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| 166 | * @param uArg The variation. See function description for odd / even details.
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| 167 | *
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| 168 | * @remark Careful with the trap 08 testcase and WP, it will tripple
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| 169 | * fault the box if the TSS, the Trap8 TSS and the fault TSS
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| 170 | * GDTE are in pages which are read-only.
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| 171 | * See bottom of SELMR3Init().
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| 172 | */
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| 173 | static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg)
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| 174 | {
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| 175 | /*
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| 176 | * Set up the testcase.
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| 177 | */
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| 178 | #if 0
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| 179 | switch (uOperation)
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| 180 | {
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| 181 | default:
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| 182 | break;
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| 183 | }
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| 184 | #endif
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| 185 |
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| 186 | /*
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| 187 | * Enable WP if odd variation.
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| 188 | */
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| 189 | if (uArg & 1)
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| 190 | vmmGCEnableWP();
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| 191 |
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| 192 | /*
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| 193 | * Execute the testcase.
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| 194 | */
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| 195 | int rc = VERR_NOT_IMPLEMENTED;
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| 196 | switch (uOperation)
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| 197 | {
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| 198 | //case VMMGC_DO_TESTCASE_TRAP_0:
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| 199 | //case VMMGC_DO_TESTCASE_TRAP_1:
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| 200 | //case VMMGC_DO_TESTCASE_TRAP_2:
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| 201 |
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| 202 | case VMMGC_DO_TESTCASE_TRAP_3:
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| 203 | {
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| 204 | if (uArg <= 1)
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| 205 | rc = vmmGCTestTrap3();
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| 206 | break;
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| 207 | }
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| 208 |
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| 209 | //case VMMGC_DO_TESTCASE_TRAP_4:
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| 210 | //case VMMGC_DO_TESTCASE_TRAP_5:
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| 211 | //case VMMGC_DO_TESTCASE_TRAP_6:
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| 212 | //case VMMGC_DO_TESTCASE_TRAP_7:
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| 213 |
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| 214 | case VMMGC_DO_TESTCASE_TRAP_8:
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| 215 | {
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| 216 | #ifndef DEBUG_bird /** @todo dynamic check that this won't tripple fault... */
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| 217 | if (uArg & 1)
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| 218 | break;
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| 219 | #endif
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| 220 | if (uArg <= 1)
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| 221 | rc = vmmGCTestTrap8();
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| 222 | break;
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| 223 | }
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| 224 |
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| 225 | //VMMGC_DO_TESTCASE_TRAP_9,
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| 226 | //VMMGC_DO_TESTCASE_TRAP_0A,
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| 227 | //VMMGC_DO_TESTCASE_TRAP_0B,
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| 228 | //VMMGC_DO_TESTCASE_TRAP_0C,
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| 229 |
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| 230 | case VMMGC_DO_TESTCASE_TRAP_0D:
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| 231 | {
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| 232 | if (uArg <= 1)
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| 233 | rc = vmmGCTestTrap0d();
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| 234 | break;
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| 235 | }
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| 236 |
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| 237 | case VMMGC_DO_TESTCASE_TRAP_0E:
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| 238 | {
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| 239 | if (uArg <= 1)
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| 240 | rc = vmmGCTestTrap0e();
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| 241 | break;
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| 242 | }
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| 243 | }
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| 244 |
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| 245 | /*
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| 246 | * Re-enable WP.
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| 247 | */
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| 248 | if (uArg & 1)
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| 249 | vmmGCDisableWP();
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| 250 |
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| 251 | return rc;
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| 252 | }
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| 253 |
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