/* $Id: VMMR0.cpp 61348 2016-05-31 17:59:34Z vboxsync $ */ /** @file * VMM - Host Context Ring 0. */ /* * Copyright (C) 2006-2015 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_VMM #include #include #include #include #include #include #include #include #include "VMMInternal.h" #include #ifdef VBOX_WITH_PCI_PASSTHROUGH # include #endif #ifdef VBOX_WITH_NEW_APIC # include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "dtrace/VBoxVMM.h" #if defined(_MSC_VER) && defined(RT_ARCH_AMD64) /** @todo check this with with VC7! */ # pragma intrinsic(_AddressOfReturnAddress) #endif #if defined(RT_OS_DARWIN) && ARCH_BITS == 32 # error "32-bit darwin is no longer supported. Go back to 4.3 or earlier!" #endif /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** @def VMM_CHECK_SMAP_SETUP * SMAP check setup. */ /** @def VMM_CHECK_SMAP_CHECK * Checks that the AC flag is set if SMAP is enabled. If AC is not set, * it will be logged and @a a_BadExpr is executed. */ /** @def VMM_CHECK_SMAP_CHECK2 * Checks that the AC flag is set if SMAP is enabled. If AC is not set, it will * be logged, written to the VMs assertion text buffer, and @a a_BadExpr is * executed. */ #if defined(VBOX_STRICT) || 1 # define VMM_CHECK_SMAP_SETUP() uint32_t const fKernelFeatures = SUPR0GetKernelFeatures() # define VMM_CHECK_SMAP_CHECK(a_BadExpr) \ do { \ if (fKernelFeatures & SUPKERNELFEATURES_SMAP) \ { \ RTCCUINTREG fEflCheck = ASMGetFlags(); \ if (RT_LIKELY(fEflCheck & X86_EFL_AC)) \ { /* likely */ } \ else \ { \ SUPR0Printf("%s, line %d: EFLAGS.AC is clear! (%#x)\n", __FUNCTION__, __LINE__, (uint32_t)fEflCheck); \ a_BadExpr; \ } \ } \ } while (0) # define VMM_CHECK_SMAP_CHECK2(a_pVM, a_BadExpr) \ do { \ if (fKernelFeatures & SUPKERNELFEATURES_SMAP) \ { \ RTCCUINTREG fEflCheck = ASMGetFlags(); \ if (RT_LIKELY(fEflCheck & X86_EFL_AC)) \ { /* likely */ } \ else \ { \ SUPR0BadContext((a_pVM) ? (a_pVM)->pSession : NULL, __FILE__, __LINE__, "EFLAGS.AC is zero!"); \ RTStrPrintf(pVM->vmm.s.szRing0AssertMsg1, sizeof(pVM->vmm.s.szRing0AssertMsg1), \ "%s, line %d: EFLAGS.AC is clear! (%#x)\n", __FUNCTION__, __LINE__, (uint32_t)fEflCheck); \ a_BadExpr; \ } \ } \ } while (0) #else # define VMM_CHECK_SMAP_SETUP() uint32_t const fKernelFeatures = 0 # define VMM_CHECK_SMAP_CHECK(a_BadExpr) NOREF(fKernelFeatures) # define VMM_CHECK_SMAP_CHECK2(a_pVM, a_BadExpr) NOREF(fKernelFeatures) #endif /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ RT_C_DECLS_BEGIN #if defined(RT_ARCH_X86) && (defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)) extern uint64_t __udivdi3(uint64_t, uint64_t); extern uint64_t __umoddi3(uint64_t, uint64_t); #endif RT_C_DECLS_END /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** Drag in necessary library bits. * The runtime lives here (in VMMR0.r0) and VBoxDD*R0.r0 links against us. */ PFNRT g_VMMR0Deps[] = { (PFNRT)RTCrc32, (PFNRT)RTOnce, #if defined(RT_ARCH_X86) && (defined(RT_OS_SOLARIS) || defined(RT_OS_FREEBSD)) (PFNRT)__udivdi3, (PFNRT)__umoddi3, #endif NULL }; #ifdef RT_OS_SOLARIS /* Dependency information for the native solaris loader. */ extern "C" { char _depends_on[] = "vboxdrv"; } #endif /** * Initialize the module. * This is called when we're first loaded. * * @returns 0 on success. * @returns VBox status on failure. * @param hMod Image handle for use in APIs. */ DECLEXPORT(int) ModuleInit(void *hMod) { VMM_CHECK_SMAP_SETUP(); VMM_CHECK_SMAP_CHECK(RT_NOTHING); #ifdef VBOX_WITH_DTRACE_R0 /* * The first thing to do is register the static tracepoints. * (Deregistration is automatic.) */ int rc2 = SUPR0TracerRegisterModule(hMod, &g_VTGObjHeader); if (RT_FAILURE(rc2)) return rc2; #endif LogFlow(("ModuleInit:\n")); #ifdef VBOX_WITH_64ON32_CMOS_DEBUG /* * Display the CMOS debug code. */ ASMOutU8(0x72, 0x03); uint8_t bDebugCode = ASMInU8(0x73); LogRel(("CMOS Debug Code: %#x (%d)\n", bDebugCode, bDebugCode)); RTLogComPrintf("CMOS Debug Code: %#x (%d)\n", bDebugCode, bDebugCode); #endif /* * Initialize the VMM, GVMM, GMM, HM, PGM (Darwin) and INTNET. */ int rc = vmmInitFormatTypes(); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = GVMMR0Init(); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = GMMR0Init(); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = HMR0Init(); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = PGMRegisterStringFormatTypes(); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE rc = PGMR0DynMapInit(); #endif if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = IntNetR0Init(); if (RT_SUCCESS(rc)) { #ifdef VBOX_WITH_PCI_PASSTHROUGH VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = PciRawR0Init(); #endif if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = CPUMR0ModuleInit(); if (RT_SUCCESS(rc)) { #ifdef VBOX_WITH_TRIPLE_FAULT_HACK VMM_CHECK_SMAP_CHECK(RT_NOTHING); rc = vmmR0TripleFaultHackInit(); if (RT_SUCCESS(rc)) #endif { VMM_CHECK_SMAP_CHECK(rc = VERR_VMM_SMAP_BUT_AC_CLEAR); if (RT_SUCCESS(rc)) { LogFlow(("ModuleInit: returns success.\n")); return VINF_SUCCESS; } } /* * Bail out. */ #ifdef VBOX_WITH_TRIPLE_FAULT_HACK vmmR0TripleFaultHackTerm(); #endif } else LogRel(("ModuleInit: CPUMR0ModuleInit -> %Rrc\n", rc)); #ifdef VBOX_WITH_PCI_PASSTHROUGH PciRawR0Term(); #endif } else LogRel(("ModuleInit: PciRawR0Init -> %Rrc\n", rc)); IntNetR0Term(); } else LogRel(("ModuleInit: IntNetR0Init -> %Rrc\n", rc)); #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE PGMR0DynMapTerm(); #endif } else LogRel(("ModuleInit: PGMR0DynMapInit -> %Rrc\n", rc)); PGMDeregisterStringFormatTypes(); } else LogRel(("ModuleInit: PGMRegisterStringFormatTypes -> %Rrc\n", rc)); HMR0Term(); } else LogRel(("ModuleInit: HMR0Init -> %Rrc\n", rc)); GMMR0Term(); } else LogRel(("ModuleInit: GMMR0Init -> %Rrc\n", rc)); GVMMR0Term(); } else LogRel(("ModuleInit: GVMMR0Init -> %Rrc\n", rc)); vmmTermFormatTypes(); } else LogRel(("ModuleInit: vmmInitFormatTypes -> %Rrc\n", rc)); LogFlow(("ModuleInit: failed %Rrc\n", rc)); return rc; } /** * Terminate the module. * This is called when we're finally unloaded. * * @param hMod Image handle for use in APIs. */ DECLEXPORT(void) ModuleTerm(void *hMod) { NOREF(hMod); LogFlow(("ModuleTerm:\n")); /* * Terminate the CPUM module (Local APIC cleanup). */ CPUMR0ModuleTerm(); /* * Terminate the internal network service. */ IntNetR0Term(); /* * PGM (Darwin), HM and PciRaw global cleanup. */ #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE PGMR0DynMapTerm(); #endif #ifdef VBOX_WITH_PCI_PASSTHROUGH PciRawR0Term(); #endif PGMDeregisterStringFormatTypes(); HMR0Term(); #ifdef VBOX_WITH_TRIPLE_FAULT_HACK vmmR0TripleFaultHackTerm(); #endif /* * Destroy the GMM and GVMM instances. */ GMMR0Term(); GVMMR0Term(); vmmTermFormatTypes(); LogFlow(("ModuleTerm: returns\n")); } /** * Initiates the R0 driver for a particular VM instance. * * @returns VBox status code. * * @param pVM The cross context VM structure. * @param uSvnRev The SVN revision of the ring-3 part. * @param uBuildType Build type indicator. * @thread EMT. */ static int vmmR0InitVM(PVM pVM, uint32_t uSvnRev, uint32_t uBuildType) { VMM_CHECK_SMAP_SETUP(); VMM_CHECK_SMAP_CHECK(return VERR_VMM_SMAP_BUT_AC_CLEAR); /* * Match the SVN revisions and build type. */ if (uSvnRev != VMMGetSvnRev()) { LogRel(("VMMR0InitVM: Revision mismatch, r3=%d r0=%d\n", uSvnRev, VMMGetSvnRev())); SUPR0Printf("VMMR0InitVM: Revision mismatch, r3=%d r0=%d\n", uSvnRev, VMMGetSvnRev()); return VERR_VMM_R0_VERSION_MISMATCH; } if (uBuildType != vmmGetBuildType()) { LogRel(("VMMR0InitVM: Build type mismatch, r3=%#x r0=%#x\n", uBuildType, vmmGetBuildType())); SUPR0Printf("VMMR0InitVM: Build type mismatch, r3=%#x r0=%#x\n", uBuildType, vmmGetBuildType()); return VERR_VMM_R0_VERSION_MISMATCH; } if ( !VALID_PTR(pVM) || pVM->pVMR0 != pVM) return VERR_INVALID_PARAMETER; #ifdef LOG_ENABLED /* * Register the EMT R0 logger instance for VCPU 0. */ PVMCPU pVCpu = &pVM->aCpus[0]; PVMMR0LOGGER pR0Logger = pVCpu->vmm.s.pR0LoggerR0; if (pR0Logger) { # if 0 /* testing of the logger. */ LogCom(("vmmR0InitVM: before %p\n", RTLogDefaultInstance())); LogCom(("vmmR0InitVM: pfnFlush=%p actual=%p\n", pR0Logger->Logger.pfnFlush, vmmR0LoggerFlush)); LogCom(("vmmR0InitVM: pfnLogger=%p actual=%p\n", pR0Logger->Logger.pfnLogger, vmmR0LoggerWrapper)); LogCom(("vmmR0InitVM: offScratch=%d fFlags=%#x fDestFlags=%#x\n", pR0Logger->Logger.offScratch, pR0Logger->Logger.fFlags, pR0Logger->Logger.fDestFlags)); RTLogSetDefaultInstanceThread(&pR0Logger->Logger, (uintptr_t)pVM->pSession); LogCom(("vmmR0InitVM: after %p reg\n", RTLogDefaultInstance())); RTLogSetDefaultInstanceThread(NULL, pVM->pSession); LogCom(("vmmR0InitVM: after %p dereg\n", RTLogDefaultInstance())); pR0Logger->Logger.pfnLogger("hello ring-0 logger\n"); LogCom(("vmmR0InitVM: returned successfully from direct logger call.\n")); pR0Logger->Logger.pfnFlush(&pR0Logger->Logger); LogCom(("vmmR0InitVM: returned successfully from direct flush call.\n")); RTLogSetDefaultInstanceThread(&pR0Logger->Logger, (uintptr_t)pVM->pSession); LogCom(("vmmR0InitVM: after %p reg2\n", RTLogDefaultInstance())); pR0Logger->Logger.pfnLogger("hello ring-0 logger\n"); LogCom(("vmmR0InitVM: returned successfully from direct logger call (2). offScratch=%d\n", pR0Logger->Logger.offScratch)); RTLogSetDefaultInstanceThread(NULL, pVM->pSession); LogCom(("vmmR0InitVM: after %p dereg2\n", RTLogDefaultInstance())); RTLogLoggerEx(&pR0Logger->Logger, 0, ~0U, "hello ring-0 logger (RTLogLoggerEx)\n"); LogCom(("vmmR0InitVM: RTLogLoggerEx returned fine offScratch=%d\n", pR0Logger->Logger.offScratch)); RTLogSetDefaultInstanceThread(&pR0Logger->Logger, (uintptr_t)pVM->pSession); RTLogPrintf("hello ring-0 logger (RTLogPrintf)\n"); LogCom(("vmmR0InitVM: RTLogPrintf returned fine offScratch=%d\n", pR0Logger->Logger.offScratch)); # endif Log(("Switching to per-thread logging instance %p (key=%p)\n", &pR0Logger->Logger, pVM->pSession)); RTLogSetDefaultInstanceThread(&pR0Logger->Logger, (uintptr_t)pVM->pSession); pR0Logger->fRegistered = true; } #endif /* LOG_ENABLED */ /* * Check if the host supports high resolution timers or not. */ if ( pVM->vmm.s.fUsePeriodicPreemptionTimers && !RTTimerCanDoHighResolution()) pVM->vmm.s.fUsePeriodicPreemptionTimers = false; /* * Initialize the per VM data for GVMM and GMM. */ VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); int rc = GVMMR0InitVM(pVM); // if (RT_SUCCESS(rc)) // rc = GMMR0InitPerVMData(pVM); if (RT_SUCCESS(rc)) { /* * Init HM, CPUM and PGM (Darwin only). */ VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); rc = HMR0InitVM(pVM); if (RT_SUCCESS(rc)) VMM_CHECK_SMAP_CHECK2(pVM, rc = VERR_VMM_RING0_ASSERTION); /* CPUR0InitVM will otherwise panic the host */ if (RT_SUCCESS(rc)) { rc = CPUMR0InitVM(pVM); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE rc = PGMR0DynMapInitVM(pVM); #endif if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); #ifdef VBOX_WITH_PCI_PASSTHROUGH rc = PciRawR0InitVM(pVM); #endif if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); rc = GIMR0InitVM(pVM); if (RT_SUCCESS(rc)) { VMM_CHECK_SMAP_CHECK2(pVM, rc = VERR_VMM_RING0_ASSERTION); if (RT_SUCCESS(rc)) { GVMMR0DoneInitVM(pVM); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); return rc; } /* bail out*/ GIMR0TermVM(pVM); } #ifdef VBOX_WITH_PCI_PASSTHROUGH PciRawR0TermVM(pVM); #endif } } } HMR0TermVM(pVM); } } RTLogSetDefaultInstanceThread(NULL, (uintptr_t)pVM->pSession); return rc; } /** * Terminates the R0 bits for a particular VM instance. * * This is normally called by ring-3 as part of the VM termination process, but * may alternatively be called during the support driver session cleanup when * the VM object is destroyed (see GVMM). * * @returns VBox status code. * * @param pVM The cross context VM structure. * @param pGVM Pointer to the global VM structure. Optional. * @thread EMT or session clean up thread. */ VMMR0_INT_DECL(int) VMMR0TermVM(PVM pVM, PGVM pGVM) { #ifdef VBOX_WITH_PCI_PASSTHROUGH PciRawR0TermVM(pVM); #endif /* * Tell GVMM what we're up to and check that we only do this once. */ if (GVMMR0DoingTermVM(pVM, pGVM)) { GIMR0TermVM(pVM); /** @todo I wish to call PGMR0PhysFlushHandyPages(pVM, &pVM->aCpus[idCpu]) * here to make sure we don't leak any shared pages if we crash... */ #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE PGMR0DynMapTermVM(pVM); #endif HMR0TermVM(pVM); } /* * Deregister the logger. */ RTLogSetDefaultInstanceThread(NULL, (uintptr_t)pVM->pSession); return VINF_SUCCESS; } /** * VMM ring-0 thread-context callback. * * This does common HM state updating and calls the HM-specific thread-context * callback. * * @param enmEvent The thread-context event. * @param pvUser Opaque pointer to the VMCPU. * * @thread EMT(pvUser) */ static DECLCALLBACK(void) vmmR0ThreadCtxCallback(RTTHREADCTXEVENT enmEvent, void *pvUser) { PVMCPU pVCpu = (PVMCPU)pvUser; switch (enmEvent) { case RTTHREADCTXEVENT_IN: { /* * Linux may call us with preemption enabled (really!) but technically we * cannot get preempted here, otherwise we end up in an infinite recursion * scenario (i.e. preempted in resume hook -> preempt hook -> resume hook... * ad infinitum). Let's just disable preemption for now... */ /** @todo r=bird: I don't believe the above. The linux code is clearly enabling * preemption after doing the callout (one or two functions up the * call chain). */ /** @todo r=ramshankar: See @bugref{5313#c30}. */ RTTHREADPREEMPTSTATE ParanoidPreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; RTThreadPreemptDisable(&ParanoidPreemptState); /* We need to update the VCPU <-> host CPU mapping. */ RTCPUID idHostCpu; uint32_t iHostCpuSet = RTMpCurSetIndexAndId(&idHostCpu); pVCpu->iHostCpuSet = iHostCpuSet; ASMAtomicWriteU32(&pVCpu->idHostCpu, idHostCpu); /* In the very unlikely event that the GIP delta for the CPU we're rescheduled needs calculating, try force a return to ring-3. We unfortunately cannot do the measurements right here. */ if (RT_UNLIKELY(SUPIsTscDeltaAvailableForCpuSetIndex(iHostCpuSet))) VMCPU_FF_SET(pVCpu, VMCPU_FF_TO_R3); /* Invoke the HM-specific thread-context callback. */ HMR0ThreadCtxCallback(enmEvent, pvUser); /* Restore preemption. */ RTThreadPreemptRestore(&ParanoidPreemptState); break; } case RTTHREADCTXEVENT_OUT: { /* Invoke the HM-specific thread-context callback. */ HMR0ThreadCtxCallback(enmEvent, pvUser); /* * Sigh. See VMMGetCpu() used by VMCPU_ASSERT_EMT(). We cannot let several VCPUs * have the same host CPU associated with it. */ pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); break; } default: /* Invoke the HM-specific thread-context callback. */ HMR0ThreadCtxCallback(enmEvent, pvUser); break; } } /** * Creates thread switching hook for the current EMT thread. * * This is called by GVMMR0CreateVM and GVMMR0RegisterVCpu. If the host * platform does not implement switcher hooks, no hooks will be create and the * member set to NIL_RTTHREADCTXHOOK. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @thread EMT(pVCpu) */ VMMR0_INT_DECL(int) VMMR0ThreadCtxHookCreateForEmt(PVMCPU pVCpu) { VMCPU_ASSERT_EMT(pVCpu); Assert(pVCpu->vmm.s.hCtxHook == NIL_RTTHREADCTXHOOK); int rc = RTThreadCtxHookCreate(&pVCpu->vmm.s.hCtxHook, 0, vmmR0ThreadCtxCallback, pVCpu); if (RT_SUCCESS(rc)) return rc; pVCpu->vmm.s.hCtxHook = NIL_RTTHREADCTXHOOK; if (rc == VERR_NOT_SUPPORTED) return VINF_SUCCESS; LogRelMax(32, ("RTThreadCtxHookCreate failed! rc=%Rrc pVCpu=%p idCpu=%RU32\n", rc, pVCpu, pVCpu->idCpu)); return VINF_SUCCESS; /* Just ignore it, we can live without context hooks. */ } /** * Destroys the thread switching hook for the specified VCPU. * * @param pVCpu The cross context virtual CPU structure. * @remarks Can be called from any thread. */ VMMR0_INT_DECL(void) VMMR0ThreadCtxHookDestroyForEmt(PVMCPU pVCpu) { int rc = RTThreadCtxHookDestroy(pVCpu->vmm.s.hCtxHook); AssertRC(rc); } /** * Disables the thread switching hook for this VCPU (if we got one). * * @param pVCpu The cross context virtual CPU structure. * @thread EMT(pVCpu) * * @remarks This also clears VMCPU::idHostCpu, so the mapping is invalid after * this call. This means you have to be careful with what you do! */ VMMR0_INT_DECL(void) VMMR0ThreadCtxHookDisable(PVMCPU pVCpu) { /* * Clear the VCPU <-> host CPU mapping as we've left HM context. * @bugref{7726#c19} explains the need for this trick: * * hmR0VmxCallRing3Callback/hmR0SvmCallRing3Callback & * hmR0VmxLeaveSession/hmR0SvmLeaveSession disables context hooks during * longjmp & normal return to ring-3, which opens a window where we may be * rescheduled without changing VMCPUID::idHostCpu and cause confusion if * the CPU starts executing a different EMT. Both functions first disables * preemption and then calls HMR0LeaveCpu which invalids idHostCpu, leaving * an opening for getting preempted. */ /** @todo Make HM not need this API! Then we could leave the hooks enabled * all the time. */ /** @todo move this into the context hook disabling if(). */ ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); /* * Disable the context hook, if we got one. */ if (pVCpu->vmm.s.hCtxHook != NIL_RTTHREADCTXHOOK) { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); int rc = RTThreadCtxHookDisable(pVCpu->vmm.s.hCtxHook); AssertRC(rc); } } /** * Internal version of VMMR0ThreadCtxHooksAreRegistered. * * @returns true if registered, false otherwise. * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(bool) vmmR0ThreadCtxHookIsEnabled(PVMCPU pVCpu) { return RTThreadCtxHookIsEnabled(pVCpu->vmm.s.hCtxHook); } /** * Whether thread-context hooks are registered for this VCPU. * * @returns true if registered, false otherwise. * @param pVCpu The cross context virtual CPU structure. */ VMMR0_INT_DECL(bool) VMMR0ThreadCtxHookIsEnabled(PVMCPU pVCpu) { return vmmR0ThreadCtxHookIsEnabled(pVCpu); } #ifdef VBOX_WITH_STATISTICS /** * Record return code statistics * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param rc The status code. */ static void vmmR0RecordRC(PVM pVM, PVMCPU pVCpu, int rc) { /* * Collect statistics. */ switch (rc) { case VINF_SUCCESS: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetNormal); break; case VINF_EM_RAW_INTERRUPT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetInterrupt); break; case VINF_EM_RAW_INTERRUPT_HYPER: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetInterruptHyper); break; case VINF_EM_RAW_GUEST_TRAP: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetGuestTrap); break; case VINF_EM_RAW_RING_SWITCH: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetRingSwitch); break; case VINF_EM_RAW_RING_SWITCH_INT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetRingSwitchInt); break; case VINF_EM_RAW_STALE_SELECTOR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetStaleSelector); break; case VINF_EM_RAW_IRET_TRAP: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIRETTrap); break; case VINF_IOM_R3_IOPORT_READ: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIORead); break; case VINF_IOM_R3_IOPORT_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIOWrite); break; case VINF_IOM_R3_IOPORT_COMMIT_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIOCommitWrite); break; case VINF_IOM_R3_MMIO_READ: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIORead); break; case VINF_IOM_R3_MMIO_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIOWrite); break; case VINF_IOM_R3_MMIO_COMMIT_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIOCommitWrite); break; case VINF_IOM_R3_MMIO_READ_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIOReadWrite); break; case VINF_PATM_HC_MMIO_PATCH_READ: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIOPatchRead); break; case VINF_PATM_HC_MMIO_PATCH_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMMIOPatchWrite); break; case VINF_CPUM_R3_MSR_READ: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMSRRead); break; case VINF_CPUM_R3_MSR_WRITE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMSRWrite); break; case VINF_EM_RAW_EMULATE_INSTR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetEmulate); break; case VINF_EM_RAW_EMULATE_IO_BLOCK: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIOBlockEmulate); break; case VINF_PATCH_EMULATE_INSTR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchEmulate); break; case VINF_EM_RAW_EMULATE_INSTR_LDT_FAULT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetLDTFault); break; case VINF_EM_RAW_EMULATE_INSTR_GDT_FAULT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetGDTFault); break; case VINF_EM_RAW_EMULATE_INSTR_IDT_FAULT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetIDTFault); break; case VINF_EM_RAW_EMULATE_INSTR_TSS_FAULT: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetTSSFault); break; case VINF_CSAM_PENDING_ACTION: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetCSAMTask); break; case VINF_PGM_SYNC_CR3: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetSyncCR3); break; case VINF_PATM_PATCH_INT3: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchInt3); break; case VINF_PATM_PATCH_TRAP_PF: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchPF); break; case VINF_PATM_PATCH_TRAP_GP: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchGP); break; case VINF_PATM_PENDING_IRQ_AFTER_IRET: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchIretIRQ); break; case VINF_EM_RESCHEDULE_REM: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetRescheduleREM); break; case VINF_EM_RAW_TO_R3: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Total); if (VM_FF_IS_PENDING(pVM, VM_FF_TM_VIRTUAL_SYNC)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3TMVirt); else if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_NEED_HANDY_PAGES)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3HandyPages); else if (VM_FF_IS_PENDING(pVM, VM_FF_PDM_QUEUES)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3PDMQueues); else if (VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Rendezvous); else if (VM_FF_IS_PENDING(pVM, VM_FF_PDM_DMA)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3DMA); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_TIMER)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Timer); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_PDM_CRITSECT)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3CritSect); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_TO_R3)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3FF); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_IEM)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Iem); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_IOM)) STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Iom); else STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetToR3Unknown); break; case VINF_EM_RAW_TIMER_PENDING: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetTimerPending); break; case VINF_EM_RAW_INTERRUPT_PENDING: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetInterruptPending); break; case VINF_VMM_CALL_HOST: switch (pVCpu->vmm.s.enmCallRing3Operation) { case VMMCALLRING3_PDM_CRIT_SECT_ENTER: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPDMCritSectEnter); break; case VMMCALLRING3_PDM_LOCK: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPDMLock); break; case VMMCALLRING3_PGM_POOL_GROW: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPGMPoolGrow); break; case VMMCALLRING3_PGM_LOCK: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPGMLock); break; case VMMCALLRING3_PGM_MAP_CHUNK: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPGMMapChunk); break; case VMMCALLRING3_PGM_ALLOCATE_HANDY_PAGES: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallPGMAllocHandy); break; case VMMCALLRING3_REM_REPLAY_HANDLER_NOTIFICATIONS: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallRemReplay); break; case VMMCALLRING3_VMM_LOGGER_FLUSH: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallLogFlush); break; case VMMCALLRING3_VM_SET_ERROR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallVMSetError); break; case VMMCALLRING3_VM_SET_RUNTIME_ERROR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZCallVMSetRuntimeError); break; case VMMCALLRING3_VM_R0_ASSERTION: default: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetCallRing3); break; } break; case VINF_PATM_DUPLICATE_FUNCTION: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPATMDuplicateFn); break; case VINF_PGM_CHANGE_MODE: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPGMChangeMode); break; case VINF_PGM_POOL_FLUSH_PENDING: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPGMFlushPending); break; case VINF_EM_PENDING_REQUEST: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPendingRequest); break; case VINF_EM_HM_PATCH_TPR_INSTR: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetPatchTPR); break; default: STAM_COUNTER_INC(&pVM->vmm.s.StatRZRetMisc); break; } } #endif /* VBOX_WITH_STATISTICS */ /** * The Ring 0 entry point, called by the fast-ioctl path. * * @param pVM The cross context VM structure. * The return code is stored in pVM->vmm.s.iLastGZRc. * @param idCpu The Virtual CPU ID of the calling EMT. * @param enmOperation Which operation to execute. * @remarks Assume called with interrupts _enabled_. */ VMMR0DECL(void) VMMR0EntryFast(PVM pVM, VMCPUID idCpu, VMMR0OPERATION enmOperation) { /* * Validation. */ if (RT_UNLIKELY(idCpu >= pVM->cCpus)) return; PVMCPU pVCpu = &pVM->aCpus[idCpu]; if (RT_UNLIKELY(pVCpu->hNativeThreadR0 != RTThreadNativeSelf())) return; VMM_CHECK_SMAP_SETUP(); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); /* * Perform requested operation. */ switch (enmOperation) { /* * Switch to GC and run guest raw mode code. * Disable interrupts before doing the world switch. */ case VMMR0_DO_RAW_RUN: { #ifdef VBOX_WITH_RAW_MODE # ifndef VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0 /* Some safety precautions first. */ if (RT_UNLIKELY(!PGMGetHyperCR3(pVCpu))) { pVCpu->vmm.s.iLastGZRc = VERR_PGM_NO_CR3_SHADOW_ROOT; break; } # endif /* * Disable preemption. */ RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; RTThreadPreemptDisable(&PreemptState); /* * Get the host CPU identifiers, make sure they are valid and that * we've got a TSC delta for the CPU. */ RTCPUID idHostCpu; uint32_t iHostCpuSet = RTMpCurSetIndexAndId(&idHostCpu); if (RT_LIKELY( iHostCpuSet < RTCPUSET_MAX_CPUS && SUPIsTscDeltaAvailableForCpuSetIndex(iHostCpuSet))) { /* * Commit the CPU identifiers and update the periodict preemption timer if it's active. */ # ifdef VBOX_WITH_VMMR0_DISABLE_LAPIC_NMI CPUMR0SetLApic(pVCpu, iHostCpuSet); # endif pVCpu->iHostCpuSet = iHostCpuSet; ASMAtomicWriteU32(&pVCpu->idHostCpu, idHostCpu); if (pVM->vmm.s.fUsePeriodicPreemptionTimers) GVMMR0SchedUpdatePeriodicPreemptionTimer(pVM, pVCpu->idHostCpu, TMCalcHostTimerFrequency(pVM, pVCpu)); /* * We might need to disable VT-x if the active switcher turns off paging. */ bool fVTxDisabled; int rc = HMR0EnterSwitcher(pVM, pVM->vmm.s.enmSwitcher, &fVTxDisabled); if (RT_SUCCESS(rc)) { /* * Disable interrupts and run raw-mode code. The loop is for efficiently * dispatching tracepoints that fired in raw-mode context. */ RTCCUINTREG uFlags = ASMIntDisableFlags(); for (;;) { VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED_EXEC); TMNotifyStartOfExecution(pVCpu); rc = pVM->vmm.s.pfnR0ToRawMode(pVM); pVCpu->vmm.s.iLastGZRc = rc; TMNotifyEndOfExecution(pVCpu); VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED); if (rc != VINF_VMM_CALL_TRACER) break; SUPR0TracerUmodProbeFire(pVM->pSession, &pVCpu->vmm.s.TracerCtx); } /* * Re-enable VT-x before we dispatch any pending host interrupts and * re-enables interrupts. */ HMR0LeaveSwitcher(pVM, fVTxDisabled); if ( rc == VINF_EM_RAW_INTERRUPT || rc == VINF_EM_RAW_INTERRUPT_HYPER) TRPMR0DispatchHostInterrupt(pVM); ASMSetFlags(uFlags); /* Fire dtrace probe and collect statistics. */ VBOXVMM_R0_VMM_RETURN_TO_RING3_RC(pVCpu, CPUMQueryGuestCtxPtr(pVCpu), rc); # ifdef VBOX_WITH_STATISTICS STAM_COUNTER_INC(&pVM->vmm.s.StatRunRC); vmmR0RecordRC(pVM, pVCpu, rc); # endif } else pVCpu->vmm.s.iLastGZRc = rc; /* * Invalidate the host CPU identifiers as we restore preemption. */ pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); RTThreadPreemptRestore(&PreemptState); } /* * Invalid CPU set index or TSC delta in need of measuring. */ else { RTThreadPreemptRestore(&PreemptState); if (iHostCpuSet < RTCPUSET_MAX_CPUS) { int rc = SUPR0TscDeltaMeasureBySetIndex(pVM->pSession, iHostCpuSet, 0 /*fFlags*/, 2 /*cMsWaitRetry*/, 5*RT_MS_1SEC /*cMsWaitThread*/, 0 /*default cTries*/); if (RT_SUCCESS(rc) || rc == VERR_CPU_OFFLINE) pVCpu->vmm.s.iLastGZRc = VINF_EM_RAW_TO_R3; else pVCpu->vmm.s.iLastGZRc = rc; } else pVCpu->vmm.s.iLastGZRc = VERR_INVALID_CPU_INDEX; } #else /* !VBOX_WITH_RAW_MODE */ pVCpu->vmm.s.iLastGZRc = VERR_RAW_MODE_NOT_SUPPORTED; #endif break; } /* * Run guest code using the available hardware acceleration technology. */ case VMMR0_DO_HM_RUN: { /* * Disable preemption. */ Assert(!vmmR0ThreadCtxHookIsEnabled(pVCpu)); RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; RTThreadPreemptDisable(&PreemptState); /* * Get the host CPU identifiers, make sure they are valid and that * we've got a TSC delta for the CPU. */ RTCPUID idHostCpu; uint32_t iHostCpuSet = RTMpCurSetIndexAndId(&idHostCpu); if (RT_LIKELY( iHostCpuSet < RTCPUSET_MAX_CPUS && SUPIsTscDeltaAvailableForCpuSetIndex(iHostCpuSet))) { pVCpu->iHostCpuSet = iHostCpuSet; ASMAtomicWriteU32(&pVCpu->idHostCpu, idHostCpu); /* * Update the periodic preemption timer if it's active. */ if (pVM->vmm.s.fUsePeriodicPreemptionTimers) GVMMR0SchedUpdatePeriodicPreemptionTimer(pVM, pVCpu->idHostCpu, TMCalcHostTimerFrequency(pVM, pVCpu)); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); #ifdef LOG_ENABLED /* * Ugly: Lazy registration of ring 0 loggers. */ if (pVCpu->idCpu > 0) { PVMMR0LOGGER pR0Logger = pVCpu->vmm.s.pR0LoggerR0; if ( pR0Logger && RT_UNLIKELY(!pR0Logger->fRegistered)) { RTLogSetDefaultInstanceThread(&pR0Logger->Logger, (uintptr_t)pVM->pSession); pR0Logger->fRegistered = true; } } #endif #ifdef VMM_R0_TOUCH_FPU /* * Make sure we've got the FPU state loaded so and we don't need to clear * CR0.TS and get out of sync with the host kernel when loading the guest * FPU state. @ref sec_cpum_fpu (CPUM.cpp) and @bugref{4053}. */ CPUMR0TouchHostFpu(); #endif int rc; bool fPreemptRestored = false; if (!HMR0SuspendPending()) { /* * Enable the context switching hook. */ if (pVCpu->vmm.s.hCtxHook != NIL_RTTHREADCTXHOOK) { Assert(!RTThreadCtxHookIsEnabled(pVCpu->vmm.s.hCtxHook)); int rc2 = RTThreadCtxHookEnable(pVCpu->vmm.s.hCtxHook); AssertRC(rc2); } /* * Enter HM context. */ rc = HMR0Enter(pVM, pVCpu); if (RT_SUCCESS(rc)) { VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED_HM); /* * When preemption hooks are in place, enable preemption now that * we're in HM context. */ if (vmmR0ThreadCtxHookIsEnabled(pVCpu)) { fPreemptRestored = true; RTThreadPreemptRestore(&PreemptState); } /* * Setup the longjmp machinery and execute guest code (calls HMR0RunGuestCode). */ VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); rc = vmmR0CallRing3SetJmp(&pVCpu->vmm.s.CallRing3JmpBufR0, HMR0RunGuestCode, pVM, pVCpu); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); /* * Assert sanity on the way out. Using manual assertions code here as normal * assertions are going to panic the host since we're outside the setjmp/longjmp zone. */ if (RT_UNLIKELY( VMCPU_GET_STATE(pVCpu) != VMCPUSTATE_STARTED_HM && RT_SUCCESS_NP(rc) && rc != VINF_VMM_CALL_HOST )) { pVM->vmm.s.szRing0AssertMsg1[0] = '\0'; RTStrPrintf(pVM->vmm.s.szRing0AssertMsg2, sizeof(pVM->vmm.s.szRing0AssertMsg2), "Got VMCPU state %d expected %d.\n", VMCPU_GET_STATE(pVCpu), VMCPUSTATE_STARTED_HM); rc = VERR_VMM_WRONG_HM_VMCPU_STATE; } /** @todo Get rid of this. HM shouldn't disable the context hook. */ else if (RT_UNLIKELY(vmmR0ThreadCtxHookIsEnabled(pVCpu))) { pVM->vmm.s.szRing0AssertMsg1[0] = '\0'; RTStrPrintf(pVM->vmm.s.szRing0AssertMsg2, sizeof(pVM->vmm.s.szRing0AssertMsg2), "Thread-context hooks still enabled! VCPU=%p Id=%u rc=%d.\n", pVCpu, pVCpu->idCpu, rc); rc = VERR_INVALID_STATE; } VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED); } STAM_COUNTER_INC(&pVM->vmm.s.StatRunRC); /* * Invalidate the host CPU identifiers before we disable the context * hook / restore preemption. */ pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); /* * Disable context hooks. Due to unresolved cleanup issues, we * cannot leave the hooks enabled when we return to ring-3. * * Note! At the moment HM may also have disabled the hook * when we get here, but the IPRT API handles that. */ if (pVCpu->vmm.s.hCtxHook != NIL_RTTHREADCTXHOOK) { ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); RTThreadCtxHookDisable(pVCpu->vmm.s.hCtxHook); } } /* * The system is about to go into suspend mode; go back to ring 3. */ else { rc = VINF_EM_RAW_INTERRUPT; pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); } /** @todo When HM stops messing with the context hook state, we'll disable * preemption again before the RTThreadCtxHookDisable call. */ if (!fPreemptRestored) RTThreadPreemptRestore(&PreemptState); pVCpu->vmm.s.iLastGZRc = rc; /* Fire dtrace probe and collect statistics. */ VBOXVMM_R0_VMM_RETURN_TO_RING3_HM(pVCpu, CPUMQueryGuestCtxPtr(pVCpu), rc); #ifdef VBOX_WITH_STATISTICS vmmR0RecordRC(pVM, pVCpu, rc); #endif } /* * Invalid CPU set index or TSC delta in need of measuring. */ else { pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); RTThreadPreemptRestore(&PreemptState); if (iHostCpuSet < RTCPUSET_MAX_CPUS) { int rc = SUPR0TscDeltaMeasureBySetIndex(pVM->pSession, iHostCpuSet, 0 /*fFlags*/, 2 /*cMsWaitRetry*/, 5*RT_MS_1SEC /*cMsWaitThread*/, 0 /*default cTries*/); if (RT_SUCCESS(rc) || rc == VERR_CPU_OFFLINE) pVCpu->vmm.s.iLastGZRc = VINF_EM_RAW_TO_R3; else pVCpu->vmm.s.iLastGZRc = rc; } else pVCpu->vmm.s.iLastGZRc = VERR_INVALID_CPU_INDEX; } break; } /* * For profiling. */ case VMMR0_DO_NOP: pVCpu->vmm.s.iLastGZRc = VINF_SUCCESS; break; /* * Impossible. */ default: AssertMsgFailed(("%#x\n", enmOperation)); pVCpu->vmm.s.iLastGZRc = VERR_NOT_SUPPORTED; break; } VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); } /** * Validates a session or VM session argument. * * @returns true / false accordingly. * @param pVM The cross context VM structure. * @param pClaimedSession The session claim to validate. * @param pSession The session argument. */ DECLINLINE(bool) vmmR0IsValidSession(PVM pVM, PSUPDRVSESSION pClaimedSession, PSUPDRVSESSION pSession) { /* This must be set! */ if (!pSession) return false; /* Only one out of the two. */ if (pVM && pClaimedSession) return false; if (pVM) pClaimedSession = pVM->pSession; return pClaimedSession == pSession; } /** * VMMR0EntryEx worker function, either called directly or when ever possible * called thru a longjmp so we can exit safely on failure. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param idCpu Virtual CPU ID argument. Must be NIL_VMCPUID if pVM * is NIL_RTR0PTR, and may be NIL_VMCPUID if it isn't * @param enmOperation Which operation to execute. * @param pReqHdr This points to a SUPVMMR0REQHDR packet. Optional. * The support driver validates this if it's present. * @param u64Arg Some simple constant argument. * @param pSession The session of the caller. * @remarks Assume called with interrupts _enabled_. */ static int vmmR0EntryExWorker(PVM pVM, VMCPUID idCpu, VMMR0OPERATION enmOperation, PSUPVMMR0REQHDR pReqHdr, uint64_t u64Arg, PSUPDRVSESSION pSession) { /* * Common VM pointer validation. */ if (pVM) { if (RT_UNLIKELY( !VALID_PTR(pVM) || ((uintptr_t)pVM & PAGE_OFFSET_MASK))) { SUPR0Printf("vmmR0EntryExWorker: Invalid pVM=%p! (op=%d)\n", pVM, enmOperation); return VERR_INVALID_POINTER; } if (RT_UNLIKELY( pVM->enmVMState < VMSTATE_CREATING || pVM->enmVMState > VMSTATE_TERMINATED || pVM->pVMR0 != pVM)) { SUPR0Printf("vmmR0EntryExWorker: Invalid pVM=%p:{enmVMState=%d, .pVMR0=%p}! (op=%d)\n", pVM, pVM->enmVMState, pVM->pVMR0, enmOperation); return VERR_INVALID_POINTER; } if (RT_UNLIKELY(idCpu >= pVM->cCpus && idCpu != NIL_VMCPUID)) { SUPR0Printf("vmmR0EntryExWorker: Invalid idCpu (%u vs cCpus=%u)\n", idCpu, pVM->cCpus); return VERR_INVALID_PARAMETER; } } else if (RT_UNLIKELY(idCpu != NIL_VMCPUID)) { SUPR0Printf("vmmR0EntryExWorker: Invalid idCpu=%u\n", idCpu); return VERR_INVALID_PARAMETER; } VMM_CHECK_SMAP_SETUP(); VMM_CHECK_SMAP_CHECK(RT_NOTHING); int rc; switch (enmOperation) { /* * GVM requests */ case VMMR0_DO_GVMM_CREATE_VM: if (pVM || u64Arg || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = GVMMR0CreateVMReq((PGVMMCREATEVMREQ)pReqHdr); VMM_CHECK_SMAP_CHECK(RT_NOTHING); break; case VMMR0_DO_GVMM_DESTROY_VM: if (pReqHdr || u64Arg) return VERR_INVALID_PARAMETER; rc = GVMMR0DestroyVM(pVM); VMM_CHECK_SMAP_CHECK(RT_NOTHING); break; case VMMR0_DO_GVMM_REGISTER_VMCPU: { if (!pVM) return VERR_INVALID_PARAMETER; rc = GVMMR0RegisterVCpu(pVM, idCpu); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } case VMMR0_DO_GVMM_SCHED_HALT: if (pReqHdr) return VERR_INVALID_PARAMETER; VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); rc = GVMMR0SchedHalt(pVM, idCpu, u64Arg); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_SCHED_WAKE_UP: if (pReqHdr || u64Arg) return VERR_INVALID_PARAMETER; VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); rc = GVMMR0SchedWakeUp(pVM, idCpu); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_SCHED_POKE: if (pReqHdr || u64Arg) return VERR_INVALID_PARAMETER; rc = GVMMR0SchedPoke(pVM, idCpu); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_SCHED_WAKE_UP_AND_POKE_CPUS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GVMMR0SchedWakeUpAndPokeCpusReq(pVM, (PGVMMSCHEDWAKEUPANDPOKECPUSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_SCHED_POLL: if (pReqHdr || u64Arg > 1) return VERR_INVALID_PARAMETER; rc = GVMMR0SchedPoll(pVM, idCpu, !!u64Arg); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_QUERY_STATISTICS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GVMMR0QueryStatisticsReq(pVM, (PGVMMQUERYSTATISTICSSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GVMM_RESET_STATISTICS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GVMMR0ResetStatisticsReq(pVM, (PGVMMRESETSTATISTICSSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * Initialize the R0 part of a VM instance. */ case VMMR0_DO_VMMR0_INIT: rc = vmmR0InitVM(pVM, RT_LODWORD(u64Arg), RT_HIDWORD(u64Arg)); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * Terminate the R0 part of a VM instance. */ case VMMR0_DO_VMMR0_TERM: rc = VMMR0TermVM(pVM, NULL); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * Attempt to enable hm mode and check the current setting. */ case VMMR0_DO_HM_ENABLE: rc = HMR0EnableAllCpus(pVM); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * Setup the hardware accelerated session. */ case VMMR0_DO_HM_SETUP_VM: rc = HMR0SetupVM(pVM); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * Switch to RC to execute Hypervisor function. */ case VMMR0_DO_CALL_HYPERVISOR: { #ifdef VBOX_WITH_RAW_MODE /* * Validate input / context. */ if (RT_UNLIKELY(idCpu != 0)) return VERR_INVALID_CPU_ID; if (RT_UNLIKELY(pVM->cCpus != 1)) return VERR_INVALID_PARAMETER; PVMCPU pVCpu = &pVM->aCpus[idCpu]; # ifndef VBOX_WITH_2X_4GB_ADDR_SPACE_IN_R0 if (RT_UNLIKELY(!PGMGetHyperCR3(pVCpu))) return VERR_PGM_NO_CR3_SHADOW_ROOT; # endif /* * Disable interrupts. */ RTCCUINTREG fFlags = ASMIntDisableFlags(); /* * Get the host CPU identifiers, make sure they are valid and that * we've got a TSC delta for the CPU. */ RTCPUID idHostCpu; uint32_t iHostCpuSet = RTMpCurSetIndexAndId(&idHostCpu); if (RT_UNLIKELY(iHostCpuSet >= RTCPUSET_MAX_CPUS)) { ASMSetFlags(fFlags); return VERR_INVALID_CPU_INDEX; } if (RT_UNLIKELY(!SUPIsTscDeltaAvailableForCpuSetIndex(iHostCpuSet))) { ASMSetFlags(fFlags); rc = SUPR0TscDeltaMeasureBySetIndex(pVM->pSession, iHostCpuSet, 0 /*fFlags*/, 2 /*cMsWaitRetry*/, 5*RT_MS_1SEC /*cMsWaitThread*/, 0 /*default cTries*/); if (RT_FAILURE(rc) && rc != VERR_CPU_OFFLINE) { VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); return rc; } } /* * Commit the CPU identifiers. */ # ifdef VBOX_WITH_VMMR0_DISABLE_LAPIC_NMI CPUMR0SetLApic(pVCpu, iHostCpuSet); # endif pVCpu->iHostCpuSet = iHostCpuSet; ASMAtomicWriteU32(&pVCpu->idHostCpu, idHostCpu); /* * We might need to disable VT-x if the active switcher turns off paging. */ bool fVTxDisabled; rc = HMR0EnterSwitcher(pVM, pVM->vmm.s.enmSwitcher, &fVTxDisabled); if (RT_SUCCESS(rc)) { /* * Go through the wormhole... */ rc = pVM->vmm.s.pfnR0ToRawMode(pVM); /* * Re-enable VT-x before we dispatch any pending host interrupts. */ HMR0LeaveSwitcher(pVM, fVTxDisabled); if ( rc == VINF_EM_RAW_INTERRUPT || rc == VINF_EM_RAW_INTERRUPT_HYPER) TRPMR0DispatchHostInterrupt(pVM); } /* * Invalidate the host CPU identifiers as we restore interrupts. */ pVCpu->iHostCpuSet = UINT32_MAX; ASMAtomicWriteU32(&pVCpu->idHostCpu, NIL_RTCPUID); ASMSetFlags(fFlags); #else /* !VBOX_WITH_RAW_MODE */ rc = VERR_RAW_MODE_NOT_SUPPORTED; #endif VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } /* * PGM wrappers. */ case VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; rc = PGMR0PhysAllocateHandyPages(pVM, &pVM->aCpus[idCpu]); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_PGM_FLUSH_HANDY_PAGES: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; rc = PGMR0PhysFlushHandyPages(pVM, &pVM->aCpus[idCpu]); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_PGM_ALLOCATE_LARGE_HANDY_PAGE: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; rc = PGMR0PhysAllocateLargeHandyPage(pVM, &pVM->aCpus[idCpu]); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_PGM_PHYS_SETUP_IOMMU: if (idCpu != 0) return VERR_INVALID_CPU_ID; rc = PGMR0PhysSetupIommu(pVM); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * GMM wrappers. */ case VMMR0_DO_GMM_INITIAL_RESERVATION: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0InitialReservationReq(pVM, idCpu, (PGMMINITIALRESERVATIONREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_UPDATE_RESERVATION: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0UpdateReservationReq(pVM, idCpu, (PGMMUPDATERESERVATIONREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_ALLOCATE_PAGES: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0AllocatePagesReq(pVM, idCpu, (PGMMALLOCATEPAGESREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_FREE_PAGES: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0FreePagesReq(pVM, idCpu, (PGMMFREEPAGESREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_FREE_LARGE_PAGE: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0FreeLargePageReq(pVM, idCpu, (PGMMFREELARGEPAGEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_QUERY_HYPERVISOR_MEM_STATS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0QueryHypervisorMemoryStatsReq(pVM, (PGMMMEMSTATSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_QUERY_MEM_STATS: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0QueryMemoryStatsReq(pVM, idCpu, (PGMMMEMSTATSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_BALLOONED_PAGES: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0BalloonedPagesReq(pVM, idCpu, (PGMMBALLOONEDPAGESREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_MAP_UNMAP_CHUNK: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0MapUnmapChunkReq(pVM, (PGMMMAPUNMAPCHUNKREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_SEED_CHUNK: if (pReqHdr) return VERR_INVALID_PARAMETER; rc = GMMR0SeedChunk(pVM, idCpu, (RTR3PTR)u64Arg); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_REGISTER_SHARED_MODULE: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0RegisterSharedModuleReq(pVM, idCpu, (PGMMREGISTERSHAREDMODULEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_UNREGISTER_SHARED_MODULE: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0UnregisterSharedModuleReq(pVM, idCpu, (PGMMUNREGISTERSHAREDMODULEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_RESET_SHARED_MODULES: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; if ( u64Arg || pReqHdr) return VERR_INVALID_PARAMETER; rc = GMMR0ResetSharedModules(pVM, idCpu); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; #ifdef VBOX_WITH_PAGE_SHARING case VMMR0_DO_GMM_CHECK_SHARED_MODULES: { if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; if ( u64Arg || pReqHdr) return VERR_INVALID_PARAMETER; PVMCPU pVCpu = &pVM->aCpus[idCpu]; Assert(pVCpu->hNativeThreadR0 == RTThreadNativeSelf()); # ifdef DEBUG_sandervl /* Make sure that log flushes can jump back to ring-3; annoying to get an incomplete log (this is risky though as the code doesn't take this into account). */ /* Todo: this can have bad side effects for unexpected jumps back to r3. */ rc = GMMR0CheckSharedModulesStart(pVM); if (rc == VINF_SUCCESS) { rc = vmmR0CallRing3SetJmp(&pVCpu->vmm.s.CallRing3JmpBufR0, GMMR0CheckSharedModules, pVM, pVCpu); /* this may resume code. */ Assert( rc == VINF_SUCCESS || (rc == VINF_VMM_CALL_HOST && pVCpu->vmm.s.enmCallRing3Operation == VMMCALLRING3_VMM_LOGGER_FLUSH)); GMMR0CheckSharedModulesEnd(pVM); } # else rc = GMMR0CheckSharedModules(pVM, pVCpu); # endif VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } #endif #if defined(VBOX_STRICT) && HC_ARCH_BITS == 64 case VMMR0_DO_GMM_FIND_DUPLICATE_PAGE: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0FindDuplicatePageReq(pVM, (PGMMFINDDUPLICATEPAGEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; #endif case VMMR0_DO_GMM_QUERY_STATISTICS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0QueryStatisticsReq(pVM, (PGMMQUERYSTATISTICSSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_GMM_RESET_STATISTICS: if (u64Arg) return VERR_INVALID_PARAMETER; rc = GMMR0ResetStatisticsReq(pVM, (PGMMRESETSTATISTICSSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; /* * A quick GCFGM mock-up. */ /** @todo GCFGM with proper access control, ring-3 management interface and all that. */ case VMMR0_DO_GCFGM_SET_VALUE: case VMMR0_DO_GCFGM_QUERY_VALUE: { if (pVM || !pReqHdr || u64Arg || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; PGCFGMVALUEREQ pReq = (PGCFGMVALUEREQ)pReqHdr; if (pReq->Hdr.cbReq != sizeof(*pReq)) return VERR_INVALID_PARAMETER; if (enmOperation == VMMR0_DO_GCFGM_SET_VALUE) { rc = GVMMR0SetConfig(pReq->pSession, &pReq->szName[0], pReq->u64Value); //if (rc == VERR_CFGM_VALUE_NOT_FOUND) // rc = GMMR0SetConfig(pReq->pSession, &pReq->szName[0], pReq->u64Value); } else { rc = GVMMR0QueryConfig(pReq->pSession, &pReq->szName[0], &pReq->u64Value); //if (rc == VERR_CFGM_VALUE_NOT_FOUND) // rc = GMMR0QueryConfig(pReq->pSession, &pReq->szName[0], &pReq->u64Value); } VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } /* * PDM Wrappers. */ case VMMR0_DO_PDM_DRIVER_CALL_REQ_HANDLER: { if (!pVM || !pReqHdr || u64Arg || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = PDMR0DriverCallReqHandler(pVM, (PPDMDRIVERCALLREQHANDLERREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } case VMMR0_DO_PDM_DEVICE_CALL_REQ_HANDLER: { if (!pVM || !pReqHdr || u64Arg || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = PDMR0DeviceCallReqHandler(pVM, (PPDMDEVICECALLREQHANDLERREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } /* * Requests to the internal networking service. */ case VMMR0_DO_INTNET_OPEN: { PINTNETOPENREQ pReq = (PINTNETOPENREQ)pReqHdr; if (u64Arg || !pReq || !vmmR0IsValidSession(pVM, pReq->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0OpenReq(pSession, pReq); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; } case VMMR0_DO_INTNET_IF_CLOSE: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFCLOSEREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfCloseReq(pSession, (PINTNETIFCLOSEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_GET_BUFFER_PTRS: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFGETBUFFERPTRSREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfGetBufferPtrsReq(pSession, (PINTNETIFGETBUFFERPTRSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_SET_PROMISCUOUS_MODE: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFSETPROMISCUOUSMODEREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfSetPromiscuousModeReq(pSession, (PINTNETIFSETPROMISCUOUSMODEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_SET_MAC_ADDRESS: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFSETMACADDRESSREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfSetMacAddressReq(pSession, (PINTNETIFSETMACADDRESSREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_SET_ACTIVE: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFSETACTIVEREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfSetActiveReq(pSession, (PINTNETIFSETACTIVEREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_SEND: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFSENDREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfSendReq(pSession, (PINTNETIFSENDREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_WAIT: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFWAITREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfWaitReq(pSession, (PINTNETIFWAITREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; case VMMR0_DO_INTNET_IF_ABORT_WAIT: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PINTNETIFWAITREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = IntNetR0IfAbortWaitReq(pSession, (PINTNETIFABORTWAITREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; #ifdef VBOX_WITH_PCI_PASSTHROUGH /* * Requests to host PCI driver service. */ case VMMR0_DO_PCIRAW_REQ: if (u64Arg || !pReqHdr || !vmmR0IsValidSession(pVM, ((PPCIRAWSENDREQ)pReqHdr)->pSession, pSession) || idCpu != NIL_VMCPUID) return VERR_INVALID_PARAMETER; rc = PciRawR0ProcessReq(pSession, pVM, (PPCIRAWSENDREQ)pReqHdr); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; #endif /* * For profiling. */ case VMMR0_DO_NOP: case VMMR0_DO_SLOW_NOP: return VINF_SUCCESS; /* * For testing Ring-0 APIs invoked in this environment. */ case VMMR0_DO_TESTS: /** @todo make new test */ return VINF_SUCCESS; #if HC_ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS) case VMMR0_DO_TEST_SWITCHER3264: if (idCpu == NIL_VMCPUID) return VERR_INVALID_CPU_ID; rc = HMR0TestSwitcher3264(pVM); VMM_CHECK_SMAP_CHECK2(pVM, RT_NOTHING); break; #endif default: /* * We're returning VERR_NOT_SUPPORT here so we've got something else * than -1 which the interrupt gate glue code might return. */ Log(("operation %#x is not supported\n", enmOperation)); return VERR_NOT_SUPPORTED; } return rc; } /** * Argument for vmmR0EntryExWrapper containing the arguments for VMMR0EntryEx. */ typedef struct VMMR0ENTRYEXARGS { PVM pVM; VMCPUID idCpu; VMMR0OPERATION enmOperation; PSUPVMMR0REQHDR pReq; uint64_t u64Arg; PSUPDRVSESSION pSession; } VMMR0ENTRYEXARGS; /** Pointer to a vmmR0EntryExWrapper argument package. */ typedef VMMR0ENTRYEXARGS *PVMMR0ENTRYEXARGS; /** * This is just a longjmp wrapper function for VMMR0EntryEx calls. * * @returns VBox status code. * @param pvArgs The argument package */ static DECLCALLBACK(int) vmmR0EntryExWrapper(void *pvArgs) { return vmmR0EntryExWorker(((PVMMR0ENTRYEXARGS)pvArgs)->pVM, ((PVMMR0ENTRYEXARGS)pvArgs)->idCpu, ((PVMMR0ENTRYEXARGS)pvArgs)->enmOperation, ((PVMMR0ENTRYEXARGS)pvArgs)->pReq, ((PVMMR0ENTRYEXARGS)pvArgs)->u64Arg, ((PVMMR0ENTRYEXARGS)pvArgs)->pSession); } /** * The Ring 0 entry point, called by the support library (SUP). * * @returns VBox status code. * @param pVM The cross context VM structure. * @param idCpu Virtual CPU ID argument. Must be NIL_VMCPUID if pVM * is NIL_RTR0PTR, and may be NIL_VMCPUID if it isn't * @param enmOperation Which operation to execute. * @param pReq Pointer to the SUPVMMR0REQHDR packet. Optional. * @param u64Arg Some simple constant argument. * @param pSession The session of the caller. * @remarks Assume called with interrupts _enabled_. */ VMMR0DECL(int) VMMR0EntryEx(PVM pVM, VMCPUID idCpu, VMMR0OPERATION enmOperation, PSUPVMMR0REQHDR pReq, uint64_t u64Arg, PSUPDRVSESSION pSession) { /* * Requests that should only happen on the EMT thread will be * wrapped in a setjmp so we can assert without causing trouble. */ if ( VALID_PTR(pVM) && pVM->pVMR0 && idCpu < pVM->cCpus) { switch (enmOperation) { /* These might/will be called before VMMR3Init. */ case VMMR0_DO_GMM_INITIAL_RESERVATION: case VMMR0_DO_GMM_UPDATE_RESERVATION: case VMMR0_DO_GMM_ALLOCATE_PAGES: case VMMR0_DO_GMM_FREE_PAGES: case VMMR0_DO_GMM_BALLOONED_PAGES: /* On the mac we might not have a valid jmp buf, so check these as well. */ case VMMR0_DO_VMMR0_INIT: case VMMR0_DO_VMMR0_TERM: { PVMCPU pVCpu = &pVM->aCpus[idCpu]; if (!pVCpu->vmm.s.CallRing3JmpBufR0.pvSavedStack) break; /** @todo validate this EMT claim... GVM knows. */ VMMR0ENTRYEXARGS Args; Args.pVM = pVM; Args.idCpu = idCpu; Args.enmOperation = enmOperation; Args.pReq = pReq; Args.u64Arg = u64Arg; Args.pSession = pSession; return vmmR0CallRing3SetJmpEx(&pVCpu->vmm.s.CallRing3JmpBufR0, vmmR0EntryExWrapper, &Args); } default: break; } } return vmmR0EntryExWorker(pVM, idCpu, enmOperation, pReq, u64Arg, pSession); } /** * Checks whether we've armed the ring-0 long jump machinery. * * @returns @c true / @c false * @param pVCpu The cross context virtual CPU structure. * @thread EMT * @sa VMMIsLongJumpArmed */ VMMR0_INT_DECL(bool) VMMR0IsLongJumpArmed(PVMCPU pVCpu) { #ifdef RT_ARCH_X86 return pVCpu->vmm.s.CallRing3JmpBufR0.eip && !pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call; #else return pVCpu->vmm.s.CallRing3JmpBufR0.rip && !pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call; #endif } /** * Checks whether we've done a ring-3 long jump. * * @returns @c true / @c false * @param pVCpu The cross context virtual CPU structure. * @thread EMT */ VMMR0_INT_DECL(bool) VMMR0IsInRing3LongJump(PVMCPU pVCpu) { return pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call; } /** * Internal R0 logger worker: Flush logger. * * @param pLogger The logger instance to flush. * @remark This function must be exported! */ VMMR0DECL(void) vmmR0LoggerFlush(PRTLOGGER pLogger) { #ifdef LOG_ENABLED /* * Convert the pLogger into a VM handle and 'call' back to Ring-3. * (This is a bit paranoid code.) */ PVMMR0LOGGER pR0Logger = (PVMMR0LOGGER)((uintptr_t)pLogger - RT_OFFSETOF(VMMR0LOGGER, Logger)); if ( !VALID_PTR(pR0Logger) || !VALID_PTR(pR0Logger + 1) || pLogger->u32Magic != RTLOGGER_MAGIC) { # ifdef DEBUG SUPR0Printf("vmmR0LoggerFlush: pLogger=%p!\n", pLogger); # endif return; } if (pR0Logger->fFlushingDisabled) return; /* quietly */ PVM pVM = pR0Logger->pVM; if ( !VALID_PTR(pVM) || pVM->pVMR0 != pVM) { # ifdef DEBUG SUPR0Printf("vmmR0LoggerFlush: pVM=%p! pVMR0=%p! pLogger=%p\n", pVM, pVM->pVMR0, pLogger); # endif return; } PVMCPU pVCpu = VMMGetCpu(pVM); if (pVCpu) { /* * Check that the jump buffer is armed. */ # ifdef RT_ARCH_X86 if ( !pVCpu->vmm.s.CallRing3JmpBufR0.eip || pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call) # else if ( !pVCpu->vmm.s.CallRing3JmpBufR0.rip || pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call) # endif { # ifdef DEBUG SUPR0Printf("vmmR0LoggerFlush: Jump buffer isn't armed!\n"); # endif return; } VMMRZCallRing3(pVM, pVCpu, VMMCALLRING3_VMM_LOGGER_FLUSH, 0); } # ifdef DEBUG else SUPR0Printf("vmmR0LoggerFlush: invalid VCPU context!\n"); # endif #else NOREF(pLogger); #endif /* LOG_ENABLED */ } /** * Internal R0 logger worker: Custom prefix. * * @returns Number of chars written. * * @param pLogger The logger instance. * @param pchBuf The output buffer. * @param cchBuf The size of the buffer. * @param pvUser User argument (ignored). */ VMMR0DECL(size_t) vmmR0LoggerPrefix(PRTLOGGER pLogger, char *pchBuf, size_t cchBuf, void *pvUser) { NOREF(pvUser); #ifdef LOG_ENABLED PVMMR0LOGGER pR0Logger = (PVMMR0LOGGER)((uintptr_t)pLogger - RT_OFFSETOF(VMMR0LOGGER, Logger)); if ( !VALID_PTR(pR0Logger) || !VALID_PTR(pR0Logger + 1) || pLogger->u32Magic != RTLOGGER_MAGIC || cchBuf < 2) return 0; static const char s_szHex[17] = "0123456789abcdef"; VMCPUID const idCpu = pR0Logger->idCpu; pchBuf[1] = s_szHex[ idCpu & 15]; pchBuf[0] = s_szHex[(idCpu >> 4) & 15]; return 2; #else NOREF(pLogger); NOREF(pchBuf); NOREF(cchBuf); return 0; #endif } #ifdef LOG_ENABLED /** * Disables flushing of the ring-0 debug log. * * @param pVCpu The cross context virtual CPU structure. */ VMMR0_INT_DECL(void) VMMR0LogFlushDisable(PVMCPU pVCpu) { if (pVCpu->vmm.s.pR0LoggerR0) pVCpu->vmm.s.pR0LoggerR0->fFlushingDisabled = true; } /** * Enables flushing of the ring-0 debug log. * * @param pVCpu The cross context virtual CPU structure. */ VMMR0_INT_DECL(void) VMMR0LogFlushEnable(PVMCPU pVCpu) { if (pVCpu->vmm.s.pR0LoggerR0) pVCpu->vmm.s.pR0LoggerR0->fFlushingDisabled = false; } /** * Checks if log flushing is disabled or not. * * @param pVCpu The cross context virtual CPU structure. */ VMMR0_INT_DECL(bool) VMMR0IsLogFlushDisabled(PVMCPU pVCpu) { if (pVCpu->vmm.s.pR0LoggerR0) return pVCpu->vmm.s.pR0LoggerR0->fFlushingDisabled; return true; } #endif /* LOG_ENABLED */ /** * Jump back to ring-3 if we're the EMT and the longjmp is armed. * * @returns true if the breakpoint should be hit, false if it should be ignored. */ DECLEXPORT(bool) RTCALL RTAssertShouldPanic(void) { #if 0 return true; #else PVM pVM = GVMMR0GetVMByEMT(NIL_RTNATIVETHREAD); if (pVM) { PVMCPU pVCpu = VMMGetCpu(pVM); if (pVCpu) { #ifdef RT_ARCH_X86 if ( pVCpu->vmm.s.CallRing3JmpBufR0.eip && !pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call) #else if ( pVCpu->vmm.s.CallRing3JmpBufR0.rip && !pVCpu->vmm.s.CallRing3JmpBufR0.fInRing3Call) #endif { int rc = VMMRZCallRing3(pVM, pVCpu, VMMCALLRING3_VM_R0_ASSERTION, 0); return RT_FAILURE_NP(rc); } } } #ifdef RT_OS_LINUX return true; #else return false; #endif #endif } /** * Override this so we can push it up to ring-3. * * @param pszExpr Expression. Can be NULL. * @param uLine Location line number. * @param pszFile Location file name. * @param pszFunction Location function name. */ DECLEXPORT(void) RTCALL RTAssertMsg1Weak(const char *pszExpr, unsigned uLine, const char *pszFile, const char *pszFunction) { /* * To the log. */ LogAlways(("\n!!R0-Assertion Failed!!\n" "Expression: %s\n" "Location : %s(%d) %s\n", pszExpr, pszFile, uLine, pszFunction)); /* * To the global VMM buffer. */ PVM pVM = GVMMR0GetVMByEMT(NIL_RTNATIVETHREAD); if (pVM) RTStrPrintf(pVM->vmm.s.szRing0AssertMsg1, sizeof(pVM->vmm.s.szRing0AssertMsg1), "\n!!R0-Assertion Failed!!\n" "Expression: %s\n" "Location : %s(%d) %s\n", pszExpr, pszFile, uLine, pszFunction); /* * Continue the normal way. */ RTAssertMsg1(pszExpr, uLine, pszFile, pszFunction); } /** * Callback for RTLogFormatV which writes to the ring-3 log port. * See PFNLOGOUTPUT() for details. */ static DECLCALLBACK(size_t) rtLogOutput(void *pv, const char *pachChars, size_t cbChars) { for (size_t i = 0; i < cbChars; i++) { LogAlways(("%c", pachChars[i])); NOREF(pachChars); } NOREF(pv); return cbChars; } /** * Override this so we can push it up to ring-3. * * @param pszFormat The format string. * @param va Arguments. */ DECLEXPORT(void) RTCALL RTAssertMsg2WeakV(const char *pszFormat, va_list va) { va_list vaCopy; /* * Push the message to the loggers. */ PRTLOGGER pLog = RTLogGetDefaultInstance(); /* Don't initialize it here... */ if (pLog) { va_copy(vaCopy, va); RTLogFormatV(rtLogOutput, pLog, pszFormat, vaCopy); va_end(vaCopy); } pLog = RTLogRelGetDefaultInstance(); if (pLog) { va_copy(vaCopy, va); RTLogFormatV(rtLogOutput, pLog, pszFormat, vaCopy); va_end(vaCopy); } /* * Push it to the global VMM buffer. */ PVM pVM = GVMMR0GetVMByEMT(NIL_RTNATIVETHREAD); if (pVM) { va_copy(vaCopy, va); RTStrPrintfV(pVM->vmm.s.szRing0AssertMsg2, sizeof(pVM->vmm.s.szRing0AssertMsg2), pszFormat, vaCopy); va_end(vaCopy); } /* * Continue the normal way. */ RTAssertMsg2V(pszFormat, va); }