| 1 | /* $Id: TRPMR0.cpp 12989 2008-10-06 02:15:39Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * TRPM - The Trap Monitor - HC Ring 0
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2006-2007 Sun Microsystems, Inc.
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
|
|---|
| 10 | * available from http://www.virtualbox.org. This file is free software;
|
|---|
| 11 | * you can redistribute it and/or modify it under the terms of the GNU
|
|---|
| 12 | * General Public License (GPL) as published by the Free Software
|
|---|
| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
|
|---|
| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
|
|---|
| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
|
|---|
| 16 | *
|
|---|
| 17 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
|
|---|
| 18 | * Clara, CA 95054 USA or visit http://www.sun.com if you need
|
|---|
| 19 | * additional information or have any questions.
|
|---|
| 20 | */
|
|---|
| 21 |
|
|---|
| 22 |
|
|---|
| 23 | /*******************************************************************************
|
|---|
| 24 | * Header Files *
|
|---|
| 25 | *******************************************************************************/
|
|---|
| 26 | #define LOG_GROUP LOG_GROUP_TRPM
|
|---|
| 27 | #include <VBox/trpm.h>
|
|---|
| 28 | #include "TRPMInternal.h"
|
|---|
| 29 | #include <VBox/vm.h>
|
|---|
| 30 | #include <VBox/err.h>
|
|---|
| 31 | #include <VBox/log.h>
|
|---|
| 32 | #include <iprt/assert.h>
|
|---|
| 33 | #include <iprt/asm.h>
|
|---|
| 34 |
|
|---|
| 35 |
|
|---|
| 36 | /**
|
|---|
| 37 | * Dispatches an interrupt that arrived while we were in the guest context.
|
|---|
| 38 | *
|
|---|
| 39 | * @param pVM The VM handle.
|
|---|
| 40 | * @remark Must be called with interrupts disabled.
|
|---|
| 41 | */
|
|---|
| 42 | VMMR0DECL(void) TRPMR0DispatchHostInterrupt(PVM pVM)
|
|---|
| 43 | {
|
|---|
| 44 | RTUINT uActiveVector = pVM->trpm.s.uActiveVector;
|
|---|
| 45 | pVM->trpm.s.uActiveVector = ~0;
|
|---|
| 46 | AssertMsgReturnVoid(uActiveVector < 256, ("uActiveVector=%#x is invalid! (More assertions to come, please enjoy!)\n", uActiveVector));
|
|---|
| 47 |
|
|---|
| 48 | #ifdef VBOX_WITH_HYBIRD_32BIT_KERNEL
|
|---|
| 49 | /*
|
|---|
| 50 | * Check if we're in long mode or not.
|
|---|
| 51 | */
|
|---|
| 52 | if ( (ASMCpuId_EDX(0x80000001) & X86_CPUID_AMD_FEATURE_EDX_LONG_MODE)
|
|---|
| 53 | && (ASMRdMsr(MSR_K6_EFER) & MSR_K6_EFER_LMA))
|
|---|
| 54 | {
|
|---|
| 55 | trpmR0DispatchHostInterruptSimple(uActiveVector);
|
|---|
| 56 | return;
|
|---|
| 57 | }
|
|---|
| 58 | #endif
|
|---|
| 59 |
|
|---|
| 60 | /*
|
|---|
| 61 | * Get the handler pointer (16:32 ptr) / (16:48 ptr).
|
|---|
| 62 | */
|
|---|
| 63 | RTIDTR Idtr;
|
|---|
| 64 | ASMGetIDTR(&Idtr);
|
|---|
| 65 | #if HC_ARCH_BITS == 32
|
|---|
| 66 | PVBOXIDTE pIdte = &((PVBOXIDTE)Idtr.pIdt)[uActiveVector];
|
|---|
| 67 | #else
|
|---|
| 68 | PVBOXIDTE pIdte = &((PVBOXIDTE)Idtr.pIdt)[uActiveVector * 2];
|
|---|
| 69 | #endif
|
|---|
| 70 | AssertMsgReturnVoid(pIdte->Gen.u1Present, ("The IDT entry (%d) is not present!\n", uActiveVector));
|
|---|
| 71 | AssertMsgReturnVoid( pIdte->Gen.u3Type1 == VBOX_IDTE_TYPE1
|
|---|
| 72 | || pIdte->Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32,
|
|---|
| 73 | ("The IDT entry (%d) is not 32-bit int gate! type1=%#x type2=%#x\n",
|
|---|
| 74 | uActiveVector, pIdte->Gen.u3Type1, pIdte->Gen.u5Type2));
|
|---|
| 75 | #if HC_ARCH_BITS == 32
|
|---|
| 76 | RTFAR32 pfnHandler;
|
|---|
| 77 | pfnHandler.off = VBOXIDTE_OFFSET(*pIdte);
|
|---|
| 78 | pfnHandler.sel = pIdte->Gen.u16SegSel;
|
|---|
| 79 |
|
|---|
| 80 | const RTR0UINTREG uRSP = ~(RTR0UINTREG)0;
|
|---|
| 81 |
|
|---|
| 82 | #else /* 64-bit: */
|
|---|
| 83 | RTFAR64 pfnHandler;
|
|---|
| 84 | pfnHandler.off = VBOXIDTE_OFFSET(*pIdte);
|
|---|
| 85 | pfnHandler.off |= (uint64_t)(*(uint32_t *)(pIdte + 1)) << 32; //cleanup!
|
|---|
| 86 | pfnHandler.sel = pIdte->Gen.u16SegSel;
|
|---|
| 87 |
|
|---|
| 88 | RTR0UINTREG uRSP = ~(RTR0UINTREG)0;
|
|---|
| 89 | if (pIdte->au32[1] & 0x7 /*IST*/)
|
|---|
| 90 | {
|
|---|
| 91 | trpmR0DispatchHostInterruptSimple(uActiveVector);
|
|---|
| 92 | return;
|
|---|
| 93 | }
|
|---|
| 94 |
|
|---|
| 95 | #endif
|
|---|
| 96 |
|
|---|
| 97 | /*
|
|---|
| 98 | * Dispatch it.
|
|---|
| 99 | */
|
|---|
| 100 | trpmR0DispatchHostInterrupt(pfnHandler.off, pfnHandler.sel, uRSP);
|
|---|
| 101 | }
|
|---|
| 102 |
|
|---|
| 103 |
|
|---|
| 104 | #ifdef VBOX_WITH_IDT_PATCHING
|
|---|
| 105 | # ifdef VBOX_WITH_HYBIRD_32BIT_KERNEL
|
|---|
| 106 | # error "VBOX_WITH_HYBIRD_32BIT_KERNEL with VBOX_WITH_IDT_PATCHING isn't supported"
|
|---|
| 107 | # endif
|
|---|
| 108 |
|
|---|
| 109 | /**
|
|---|
| 110 | * Changes the VMMR0Entry() call frame and stack used by the IDT patch code
|
|---|
| 111 | * so that we'll dispatch an interrupt rather than returning directly to Ring-3
|
|---|
| 112 | * when VMMR0Entry() returns.
|
|---|
| 113 | *
|
|---|
| 114 | * @param pVM Pointer to the VM.
|
|---|
| 115 | * @param pvRet Pointer to the return address of VMMR0Entry() on the stack.
|
|---|
| 116 | */
|
|---|
| 117 | VMMR0DECL(void) TRPMR0SetupInterruptDispatcherFrame(PVM pVM, void *pvRet)
|
|---|
| 118 | {
|
|---|
| 119 | RTUINT uActiveVector = pVM->trpm.s.uActiveVector;
|
|---|
| 120 | pVM->trpm.s.uActiveVector = ~0;
|
|---|
| 121 | AssertMsgReturnVoid(uActiveVector < 256, ("uActiveVector=%#x is invalid! (More assertions to come, please enjoy!)\n", uActiveVector));
|
|---|
| 122 |
|
|---|
| 123 | #if HC_ARCH_BITS == 32
|
|---|
| 124 | /*
|
|---|
| 125 | * Get the handler pointer (16:32 ptr).
|
|---|
| 126 | */
|
|---|
| 127 | RTIDTR Idtr;
|
|---|
| 128 | ASMGetIDTR(&Idtr);
|
|---|
| 129 | PVBOXIDTE pIdte = &((PVBOXIDTE)Idtr.pIdt)[uActiveVector];
|
|---|
| 130 | AssertMsgReturnVoid(pIdte->Gen.u1Present, ("The IDT entry (%d) is not present!\n", uActiveVector));
|
|---|
| 131 | AssertMsgReturnVoid( pIdte->Gen.u3Type1 == VBOX_IDTE_TYPE1
|
|---|
| 132 | && pIdte->Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32,
|
|---|
| 133 | ("The IDT entry (%d) is not 32-bit int gate! type1=%#x type2=%#x\n",
|
|---|
| 134 | uActiveVector, pIdte->Gen.u3Type1, pIdte->Gen.u5Type2));
|
|---|
| 135 |
|
|---|
| 136 | RTFAR32 pfnHandler;
|
|---|
| 137 | pfnHandler.off = VBOXIDTE_OFFSET(*pIdte);
|
|---|
| 138 | pfnHandler.sel = pIdte->Gen.u16SegSel;
|
|---|
| 139 |
|
|---|
| 140 | /*
|
|---|
| 141 | * The stack frame is as follows:
|
|---|
| 142 | *
|
|---|
| 143 | * 1c iret frame
|
|---|
| 144 | * 18 fs
|
|---|
| 145 | * 14 ds
|
|---|
| 146 | * 10 es
|
|---|
| 147 | * c uArg
|
|---|
| 148 | * 8 uOperation
|
|---|
| 149 | * 4 pVM
|
|---|
| 150 | * 0 return address (pvRet points here)
|
|---|
| 151 | *
|
|---|
| 152 | * We'll change the stackframe so that we will not return
|
|---|
| 153 | * to the caller but to a interrupt dispatcher. We'll also
|
|---|
| 154 | * setup the frame so that ds and es are moved to give room
|
|---|
| 155 | * to a far return (to the handler).
|
|---|
| 156 | */
|
|---|
| 157 | unsigned *pau = (unsigned *)pvRet;
|
|---|
| 158 | pau[0] = (unsigned)trpmR0InterruptDispatcher; /* new return address */
|
|---|
| 159 | pau[3] = pau[6]; /* uArg = fs */
|
|---|
| 160 | pau[2] = pau[5]; /* uOperation = ds */
|
|---|
| 161 | pau[5] = pfnHandler.off; /* ds = retf off */
|
|---|
| 162 | pau[6] = pfnHandler.sel; /* fs = retf sel */
|
|---|
| 163 |
|
|---|
| 164 | #else /* 64-bit: */
|
|---|
| 165 |
|
|---|
| 166 | /*
|
|---|
| 167 | * Get the handler pointer (16:48 ptr).
|
|---|
| 168 | */
|
|---|
| 169 | RTIDTR Idtr;
|
|---|
| 170 | ASMGetIDTR(&Idtr);
|
|---|
| 171 | PVBOXIDTE pIdte = &((PVBOXIDTE)Idtr.pIdt)[uActiveVector * 2];
|
|---|
| 172 |
|
|---|
| 173 | AssertMsgReturnVoid(pIdte->Gen.u1Present, ("The IDT entry (%d) is not present!\n", uActiveVector));
|
|---|
| 174 | AssertMsgReturnVoid( pIdte->Gen.u3Type1 == VBOX_IDTE_TYPE1
|
|---|
| 175 | && pIdte->Gen.u5Type2 == VBOX_IDTE_TYPE2_INT_32, /* == 64 */
|
|---|
| 176 | ("The IDT entry (%d) is not 64-bit int gate! type1=%#x type2=%#x\n",
|
|---|
| 177 | uActiveVector, pIdte->Gen.u3Type1, pIdte->Gen.u5Type2));
|
|---|
| 178 |
|
|---|
| 179 | RTFAR64 pfnHandler;
|
|---|
| 180 | pfnHandler.off = VBOXIDTE_OFFSET(*pIdte);
|
|---|
| 181 | pfnHandler.off |= (uint64_t)(*(uint32_t *)(pIdte + 1)) << 32; //cleanup!
|
|---|
| 182 | pfnHandler.sel = pIdte->Gen.u16SegSel;
|
|---|
| 183 |
|
|---|
| 184 | if (pIdte->au32[1] & 0x7 /*IST*/)
|
|---|
| 185 | {
|
|---|
| 186 | /** @todo implement IST */
|
|---|
| 187 | }
|
|---|
| 188 |
|
|---|
| 189 | /*
|
|---|
| 190 | * The stack frame is as follows:
|
|---|
| 191 | *
|
|---|
| 192 | * 28 iret frame
|
|---|
| 193 | * 20 dummy
|
|---|
| 194 | * 14 uArg
|
|---|
| 195 | * 10 uOperation
|
|---|
| 196 | * 8 pVM
|
|---|
| 197 | * 0 return address (pvRet points here)
|
|---|
| 198 | *
|
|---|
| 199 | * We'll change the stackframe so that we will not return
|
|---|
| 200 | * to the caller but to a interrupt dispatcher. And we'll create
|
|---|
| 201 | * a 64-bit far return frame where dummy and uArg is.
|
|---|
| 202 | */
|
|---|
| 203 | uint64_t *pau = (uint64_t *)pvRet;
|
|---|
| 204 | Assert(pau[1] == (uint64_t)pVM);
|
|---|
| 205 | pau[0] = (uint64_t)trpmR0InterruptDispatcher; /* new return address */
|
|---|
| 206 | pau[3] = pfnHandler.off; /* retf off */
|
|---|
| 207 | pau[4] = pfnHandler.sel; /* retf sel */
|
|---|
| 208 | #endif
|
|---|
| 209 | }
|
|---|
| 210 |
|
|---|
| 211 | #endif /* VBOX_WITH_IDT_PATCHING */
|
|---|
