diff options
Diffstat (limited to 'src/VBox/VMM/VMMR0/HMR0.cpp')
-rw-r--r-- | src/VBox/VMM/VMMR0/HMR0.cpp | 1993 |
1 files changed, 1993 insertions, 0 deletions
diff --git a/src/VBox/VMM/VMMR0/HMR0.cpp b/src/VBox/VMM/VMMR0/HMR0.cpp new file mode 100644 index 00000000..f4fe70b0 --- /dev/null +++ b/src/VBox/VMM/VMMR0/HMR0.cpp @@ -0,0 +1,1993 @@ +/* $Id: HMR0.cpp $ */ +/** @file + * Hardware Assisted Virtualization Manager (HM) - Host Context Ring-0. + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * SPDX-License-Identifier: GPL-3.0-only + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP LOG_GROUP_HM +#define VMCPU_INCL_CPUM_GST_CTX +#include <VBox/vmm/hm.h> +#include <VBox/vmm/pgm.h> +#include "HMInternal.h" +#include <VBox/vmm/vmcc.h> +#include <VBox/vmm/hm_svm.h> +#include <VBox/vmm/hmvmxinline.h> +#include <VBox/err.h> +#include <VBox/log.h> +#include <iprt/assert.h> +#include <iprt/asm.h> +#include <iprt/asm-amd64-x86.h> +#include <iprt/cpuset.h> +#include <iprt/mem.h> +#include <iprt/memobj.h> +#include <iprt/once.h> +#include <iprt/param.h> +#include <iprt/power.h> +#include <iprt/string.h> +#include <iprt/thread.h> +#include <iprt/x86.h> +#include "HMVMXR0.h" +#include "HMSVMR0.h" + + +/********************************************************************************************************************************* +* Internal Functions * +*********************************************************************************************************************************/ +static DECLCALLBACK(void) hmR0EnableCpuCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2); +static DECLCALLBACK(void) hmR0DisableCpuCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2); +static DECLCALLBACK(void) hmR0PowerCallback(RTPOWEREVENT enmEvent, void *pvUser); +static DECLCALLBACK(void) hmR0MpEventCallback(RTMPEVENT enmEvent, RTCPUID idCpu, void *pvData); + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * This is used to manage the status code of a RTMpOnAll in HM. + */ +typedef struct HMR0FIRSTRC +{ + /** The status code. */ + int32_t volatile rc; + /** The ID of the CPU reporting the first failure. */ + RTCPUID volatile idCpu; +} HMR0FIRSTRC; +/** Pointer to a first return code structure. */ +typedef HMR0FIRSTRC *PHMR0FIRSTRC; + +/** + * Ring-0 method table for AMD-V and VT-x specific operations. + */ +typedef struct HMR0VTABLE +{ + DECLR0CALLBACKMEMBER(int, pfnEnterSession, (PVMCPUCC pVCpu)); + DECLR0CALLBACKMEMBER(void, pfnThreadCtxCallback, (RTTHREADCTXEVENT enmEvent, PVMCPUCC pVCpu, bool fGlobalInit)); + DECLR0CALLBACKMEMBER(int, pfnAssertionCallback, (PVMCPUCC pVCpu)); + DECLR0CALLBACKMEMBER(int, pfnExportHostState, (PVMCPUCC pVCpu)); + DECLR0CALLBACKMEMBER(VBOXSTRICTRC, pfnRunGuestCode, (PVMCPUCC pVCpu)); + DECLR0CALLBACKMEMBER(int, pfnEnableCpu, (PHMPHYSCPU pHostCpu, PVMCC pVM, void *pvCpuPage, RTHCPHYS HCPhysCpuPage, + bool fEnabledByHost, PCSUPHWVIRTMSRS pHwvirtMsrs)); + DECLR0CALLBACKMEMBER(int, pfnDisableCpu, (PHMPHYSCPU pHostCpu, void *pvCpuPage, RTHCPHYS HCPhysCpuPage)); + DECLR0CALLBACKMEMBER(int, pfnInitVM, (PVMCC pVM)); + DECLR0CALLBACKMEMBER(int, pfnTermVM, (PVMCC pVM)); + DECLR0CALLBACKMEMBER(int, pfnSetupVM, (PVMCC pVM)); +} HMR0VTABLE; + + +/********************************************************************************************************************************* +* Global Variables * +*********************************************************************************************************************************/ +/** The active ring-0 HM operations (copied from one of the table at init). */ +static HMR0VTABLE g_HmR0Ops; +/** Indicates whether the host is suspending or not. We'll refuse a few + * actions when the host is being suspended to speed up the suspending and + * avoid trouble. */ +static bool volatile g_fHmSuspended; +/** If set, VT-x/AMD-V is enabled globally at init time, otherwise it's + * enabled and disabled each time it's used to execute guest code. */ +static bool g_fHmGlobalInit; +/** Host kernel flags that HM might need to know (SUPKERNELFEATURES_XXX). */ +uint32_t g_fHmHostKernelFeatures; +/** Maximum allowed ASID/VPID (inclusive). + * @todo r=bird: This is exclusive for VT-x according to source code comment. + * Couldn't immediately find any docs on AMD-V, but suspect it is + * exclusive there as well given how hmR0SvmFlushTaggedTlb() use it. */ +uint32_t g_uHmMaxAsid; + + +/** Set if VT-x (VMX) is supported by the CPU. */ +bool g_fHmVmxSupported = false; +/** VMX: Whether we're using the preemption timer or not. */ +bool g_fHmVmxUsePreemptTimer; +/** VMX: The shift mask employed by the VMX-Preemption timer. */ +uint8_t g_cHmVmxPreemptTimerShift; +/** VMX: Set if swapping EFER is supported. */ +bool g_fHmVmxSupportsVmcsEfer = false; +/** VMX: Whether we're using SUPR0EnableVTx or not. */ +static bool g_fHmVmxUsingSUPR0EnableVTx = false; +/** VMX: Set if we've called SUPR0EnableVTx(true) and should disable it during + * module termination. */ +static bool g_fHmVmxCalledSUPR0EnableVTx = false; +/** VMX: Host CR4 value (set by ring-0 VMX init) */ +uint64_t g_uHmVmxHostCr4; +/** VMX: Host EFER value (set by ring-0 VMX init) */ +uint64_t g_uHmVmxHostMsrEfer; +/** VMX: Host SMM monitor control (used for logging/diagnostics) */ +uint64_t g_uHmVmxHostSmmMonitorCtl; + + +/** Set if AMD-V is supported by the CPU. */ +bool g_fHmSvmSupported = false; +/** SVM revision. */ +uint32_t g_uHmSvmRev; +/** SVM feature bits from cpuid 0x8000000a */ +uint32_t g_fHmSvmFeatures; + + +/** MSRs. */ +SUPHWVIRTMSRS g_HmMsrs; + +/** Last recorded error code during HM ring-0 init. */ +static int32_t g_rcHmInit = VINF_SUCCESS; + +/** Per CPU globals. */ +static HMPHYSCPU g_aHmCpuInfo[RTCPUSET_MAX_CPUS]; + +/** Whether we've already initialized all CPUs. + * @remarks We could check the EnableAllCpusOnce state, but this is + * simpler and hopefully easier to understand. */ +static bool g_fHmEnabled = false; +/** Serialize initialization in HMR0EnableAllCpus. */ +static RTONCE g_HmEnableAllCpusOnce = RTONCE_INITIALIZER; + + +/** HM ring-0 operations for VT-x. */ +static HMR0VTABLE const g_HmR0OpsVmx = +{ + /* .pfnEnterSession = */ VMXR0Enter, + /* .pfnThreadCtxCallback = */ VMXR0ThreadCtxCallback, + /* .pfnAssertionCallback = */ VMXR0AssertionCallback, + /* .pfnExportHostState = */ VMXR0ExportHostState, + /* .pfnRunGuestCode = */ VMXR0RunGuestCode, + /* .pfnEnableCpu = */ VMXR0EnableCpu, + /* .pfnDisableCpu = */ VMXR0DisableCpu, + /* .pfnInitVM = */ VMXR0InitVM, + /* .pfnTermVM = */ VMXR0TermVM, + /* .pfnSetupVM = */ VMXR0SetupVM, +}; + +/** HM ring-0 operations for AMD-V. */ +static HMR0VTABLE const g_HmR0OpsSvm = +{ + /* .pfnEnterSession = */ SVMR0Enter, + /* .pfnThreadCtxCallback = */ SVMR0ThreadCtxCallback, + /* .pfnAssertionCallback = */ SVMR0AssertionCallback, + /* .pfnExportHostState = */ SVMR0ExportHostState, + /* .pfnRunGuestCode = */ SVMR0RunGuestCode, + /* .pfnEnableCpu = */ SVMR0EnableCpu, + /* .pfnDisableCpu = */ SVMR0DisableCpu, + /* .pfnInitVM = */ SVMR0InitVM, + /* .pfnTermVM = */ SVMR0TermVM, + /* .pfnSetupVM = */ SVMR0SetupVM, +}; + + +/** @name Dummy callback handlers for when neither VT-x nor AMD-V is supported. + * @{ */ + +static DECLCALLBACK(int) hmR0DummyEnter(PVMCPUCC pVCpu) +{ + RT_NOREF(pVCpu); + return VINF_SUCCESS; +} + +static DECLCALLBACK(void) hmR0DummyThreadCtxCallback(RTTHREADCTXEVENT enmEvent, PVMCPUCC pVCpu, bool fGlobalInit) +{ + RT_NOREF(enmEvent, pVCpu, fGlobalInit); +} + +static DECLCALLBACK(int) hmR0DummyEnableCpu(PHMPHYSCPU pHostCpu, PVMCC pVM, void *pvCpuPage, RTHCPHYS HCPhysCpuPage, + bool fEnabledBySystem, PCSUPHWVIRTMSRS pHwvirtMsrs) +{ + RT_NOREF(pHostCpu, pVM, pvCpuPage, HCPhysCpuPage, fEnabledBySystem, pHwvirtMsrs); + return VINF_SUCCESS; +} + +static DECLCALLBACK(int) hmR0DummyDisableCpu(PHMPHYSCPU pHostCpu, void *pvCpuPage, RTHCPHYS HCPhysCpuPage) +{ + RT_NOREF(pHostCpu, pvCpuPage, HCPhysCpuPage); + return VINF_SUCCESS; +} + +static DECLCALLBACK(int) hmR0DummyInitVM(PVMCC pVM) +{ + RT_NOREF(pVM); + return VINF_SUCCESS; +} + +static DECLCALLBACK(int) hmR0DummyTermVM(PVMCC pVM) +{ + RT_NOREF(pVM); + return VINF_SUCCESS; +} + +static DECLCALLBACK(int) hmR0DummySetupVM(PVMCC pVM) +{ + RT_NOREF(pVM); + return VINF_SUCCESS; +} + +static DECLCALLBACK(int) hmR0DummyAssertionCallback(PVMCPUCC pVCpu) +{ + RT_NOREF(pVCpu); + return VINF_SUCCESS; +} + +static DECLCALLBACK(VBOXSTRICTRC) hmR0DummyRunGuestCode(PVMCPUCC pVCpu) +{ + RT_NOREF(pVCpu); + return VERR_NOT_SUPPORTED; +} + +static DECLCALLBACK(int) hmR0DummyExportHostState(PVMCPUCC pVCpu) +{ + RT_NOREF(pVCpu); + return VINF_SUCCESS; +} + +/** Dummy ops. */ +static HMR0VTABLE const g_HmR0OpsDummy = +{ + /* .pfnEnterSession = */ hmR0DummyEnter, + /* .pfnThreadCtxCallback = */ hmR0DummyThreadCtxCallback, + /* .pfnAssertionCallback = */ hmR0DummyAssertionCallback, + /* .pfnExportHostState = */ hmR0DummyExportHostState, + /* .pfnRunGuestCode = */ hmR0DummyRunGuestCode, + /* .pfnEnableCpu = */ hmR0DummyEnableCpu, + /* .pfnDisableCpu = */ hmR0DummyDisableCpu, + /* .pfnInitVM = */ hmR0DummyInitVM, + /* .pfnTermVM = */ hmR0DummyTermVM, + /* .pfnSetupVM = */ hmR0DummySetupVM, +}; + +/** @} */ + + +/** + * Initializes a first return code structure. + * + * @param pFirstRc The structure to init. + */ +static void hmR0FirstRcInit(PHMR0FIRSTRC pFirstRc) +{ + pFirstRc->rc = VINF_SUCCESS; + pFirstRc->idCpu = NIL_RTCPUID; +} + + +/** + * Try set the status code (success ignored). + * + * @param pFirstRc The first return code structure. + * @param rc The status code. + */ +static void hmR0FirstRcSetStatus(PHMR0FIRSTRC pFirstRc, int rc) +{ + if ( RT_FAILURE(rc) + && ASMAtomicCmpXchgS32(&pFirstRc->rc, rc, VINF_SUCCESS)) + pFirstRc->idCpu = RTMpCpuId(); +} + + +/** + * Get the status code of a first return code structure. + * + * @returns The status code; VINF_SUCCESS or error status, no informational or + * warning errors. + * @param pFirstRc The first return code structure. + */ +static int hmR0FirstRcGetStatus(PHMR0FIRSTRC pFirstRc) +{ + return pFirstRc->rc; +} + + +#ifdef VBOX_STRICT +# ifndef DEBUG_bird +/** + * Get the CPU ID on which the failure status code was reported. + * + * @returns The CPU ID, NIL_RTCPUID if no failure was reported. + * @param pFirstRc The first return code structure. + */ +static RTCPUID hmR0FirstRcGetCpuId(PHMR0FIRSTRC pFirstRc) +{ + return pFirstRc->idCpu; +} +# endif +#endif /* VBOX_STRICT */ + + +/** + * Verify if VMX is really usable by entering and exiting VMX root mode. + * + * @returns VBox status code. + * @param uVmxBasicMsr The host's IA32_VMX_BASIC_MSR value. + */ +static int hmR0InitIntelVerifyVmxUsability(uint64_t uVmxBasicMsr) +{ + /* Allocate a temporary VMXON region. */ + RTR0MEMOBJ hScatchMemObj; + int rc = RTR0MemObjAllocCont(&hScatchMemObj, HOST_PAGE_SIZE, false /* fExecutable */); + if (RT_FAILURE(rc)) + { + LogRelFunc(("RTR0MemObjAllocCont(,HOST_PAGE_SIZE,false) -> %Rrc\n", rc)); + return rc; + } + void *pvScatchPage = RTR0MemObjAddress(hScatchMemObj); + RTHCPHYS const HCPhysScratchPage = RTR0MemObjGetPagePhysAddr(hScatchMemObj, 0); + RT_BZERO(pvScatchPage, HOST_PAGE_SIZE); + + /* Set revision dword at the beginning of the VMXON structure. */ + *(uint32_t *)pvScatchPage = RT_BF_GET(uVmxBasicMsr, VMX_BF_BASIC_VMCS_ID); + + /* Make sure we don't get rescheduled to another CPU during this probe. */ + RTCCUINTREG const fEFlags = ASMIntDisableFlags(); + + /* Enable CR4.VMXE if it isn't already set. */ + RTCCUINTREG const uOldCr4 = SUPR0ChangeCR4(X86_CR4_VMXE, RTCCUINTREG_MAX); + + /* + * The only way of checking if we're in VMX root mode is to try and enter it. + * There is no instruction or control bit that tells us if we're in VMX root mode. + * Therefore, try and enter and exit VMX root mode. + */ + rc = VMXEnable(HCPhysScratchPage); + if (RT_SUCCESS(rc)) + VMXDisable(); + else + { + /* + * KVM leaves the CPU in VMX root mode. Not only is this not allowed, + * it will crash the host when we enter raw mode, because: + * + * (a) clearing X86_CR4_VMXE in CR4 causes a #GP (we no longer modify + * this bit), and + * (b) turning off paging causes a #GP (unavoidable when switching + * from long to 32 bits mode or 32 bits to PAE). + * + * They should fix their code, but until they do we simply refuse to run. + */ + rc = VERR_VMX_IN_VMX_ROOT_MODE; + } + + /* Restore CR4.VMXE if it wasn't set prior to us setting it above. */ + if (!(uOldCr4 & X86_CR4_VMXE)) + SUPR0ChangeCR4(0 /* fOrMask */, ~(uint64_t)X86_CR4_VMXE); + + /* Restore interrupts. */ + ASMSetFlags(fEFlags); + + RTR0MemObjFree(hScatchMemObj, false); + + return rc; +} + + +/** + * Worker function used by hmR0PowerCallback() and HMR0Init() to initalize VT-x + * on a CPU. + * + * @param idCpu The identifier for the CPU the function is called on. + * @param pvUser1 Pointer to the first RC structure. + * @param pvUser2 Ignored. + */ +static DECLCALLBACK(void) hmR0InitIntelCpu(RTCPUID idCpu, void *pvUser1, void *pvUser2) +{ + PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser1; + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */ + NOREF(idCpu); NOREF(pvUser2); + + int rc = SUPR0GetVmxUsability(NULL /* pfIsSmxModeAmbiguous */); + hmR0FirstRcSetStatus(pFirstRc, rc); +} + + +/** + * Intel specific initialization code. + * + * @returns VBox status code (will only fail if out of memory). + */ +static int hmR0InitIntel(void) +{ + /* Read this MSR now as it may be useful for error reporting when initializing VT-x fails. */ + g_HmMsrs.u.vmx.u64FeatCtrl = ASMRdMsr(MSR_IA32_FEATURE_CONTROL); + + /* + * First try use native kernel API for controlling VT-x. + * (This is only supported by some Mac OS X kernels atm.) + */ + int rc; + g_rcHmInit = rc = SUPR0EnableVTx(true /* fEnable */); + g_fHmVmxUsingSUPR0EnableVTx = rc != VERR_NOT_SUPPORTED; + if (g_fHmVmxUsingSUPR0EnableVTx) + { + AssertLogRelMsg(rc == VINF_SUCCESS || rc == VERR_VMX_IN_VMX_ROOT_MODE || rc == VERR_VMX_NO_VMX, ("%Rrc\n", rc)); + if (RT_SUCCESS(rc)) + { + g_fHmVmxSupported = true; + rc = SUPR0EnableVTx(false /* fEnable */); + AssertLogRelRC(rc); + rc = VINF_SUCCESS; + } + } + else + { + HMR0FIRSTRC FirstRc; + hmR0FirstRcInit(&FirstRc); + g_rcHmInit = rc = RTMpOnAll(hmR0InitIntelCpu, &FirstRc, NULL); + if (RT_SUCCESS(rc)) + g_rcHmInit = rc = hmR0FirstRcGetStatus(&FirstRc); + } + + if (RT_SUCCESS(rc)) + { + /* Read CR4 and EFER for logging/diagnostic purposes. */ + g_uHmVmxHostCr4 = ASMGetCR4(); + g_uHmVmxHostMsrEfer = ASMRdMsr(MSR_K6_EFER); + + /* Get VMX MSRs (and feature control MSR) for determining VMX features we can ultimately use. */ + SUPR0GetHwvirtMsrs(&g_HmMsrs, SUPVTCAPS_VT_X, false /* fForce */); + + /* + * Nested KVM workaround: Intel SDM section 34.15.5 describes that + * MSR_IA32_SMM_MONITOR_CTL depends on bit 49 of MSR_IA32_VMX_BASIC while + * table 35-2 says that this MSR is available if either VMX or SMX is supported. + */ + uint64_t const uVmxBasicMsr = g_HmMsrs.u.vmx.u64Basic; + if (RT_BF_GET(uVmxBasicMsr, VMX_BF_BASIC_DUAL_MON)) + g_uHmVmxHostSmmMonitorCtl = ASMRdMsr(MSR_IA32_SMM_MONITOR_CTL); + + /* Initialize VPID - 16 bits ASID. */ + g_uHmMaxAsid = 0x10000; /* exclusive */ + + /* + * If the host OS has not enabled VT-x for us, try enter VMX root mode + * to really verify if VT-x is usable. + */ + if (!g_fHmVmxUsingSUPR0EnableVTx) + { + /* + * We don't verify VMX root mode on all CPUs here because the verify + * function exits VMX root mode thus potentially allowing other + * programs to grab VT-x. Our global init's entering and staying in + * VMX root mode (until our module termination) is done later when + * the first VM powers up (after module initialization) using + * VMMR0_DO_HM_ENABLE which calls HMR0EnableAllCpus(). + * + * This is just a quick sanity check. + */ + rc = hmR0InitIntelVerifyVmxUsability(uVmxBasicMsr); + if (RT_SUCCESS(rc)) + g_fHmVmxSupported = true; + else + { + g_rcHmInit = rc; + Assert(g_fHmVmxSupported == false); + } + } + + if (g_fHmVmxSupported) + { + rc = VMXR0GlobalInit(); + if (RT_SUCCESS(rc)) + { + /* + * Install the VT-x methods. + */ + g_HmR0Ops = g_HmR0OpsVmx; + + /* + * Check for the VMX-Preemption Timer and adjust for the "VMX-Preemption + * Timer Does Not Count Down at the Rate Specified" CPU erratum. + */ + if (g_HmMsrs.u.vmx.PinCtls.n.allowed1 & VMX_PIN_CTLS_PREEMPT_TIMER) + { + g_fHmVmxUsePreemptTimer = true; + g_cHmVmxPreemptTimerShift = RT_BF_GET(g_HmMsrs.u.vmx.u64Misc, VMX_BF_MISC_PREEMPT_TIMER_TSC); + if (HMIsSubjectToVmxPreemptTimerErratum()) + g_cHmVmxPreemptTimerShift = 0; /* This is about right most of the time here. */ + } + else + g_fHmVmxUsePreemptTimer = false; + + /* + * Check for EFER swapping support. + */ + g_fHmVmxSupportsVmcsEfer = (g_HmMsrs.u.vmx.EntryCtls.n.allowed1 & VMX_ENTRY_CTLS_LOAD_EFER_MSR) + && (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_LOAD_EFER_MSR) + && (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_SAVE_EFER_MSR); + } + else + { + g_rcHmInit = rc; + g_fHmVmxSupported = false; + } + } + } +#ifdef LOG_ENABLED + else + SUPR0Printf("hmR0InitIntelCpu failed with rc=%Rrc\n", g_rcHmInit); +#endif + return VINF_SUCCESS; +} + + +/** + * Worker function used by hmR0PowerCallback() and HMR0Init() to initalize AMD-V + * on a CPU. + * + * @param idCpu The identifier for the CPU the function is called on. + * @param pvUser1 Pointer to the first RC structure. + * @param pvUser2 Ignored. + */ +static DECLCALLBACK(void) hmR0InitAmdCpu(RTCPUID idCpu, void *pvUser1, void *pvUser2) +{ + PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser1; + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */ + NOREF(idCpu); NOREF(pvUser2); + + int rc = SUPR0GetSvmUsability(true /* fInitSvm */); + hmR0FirstRcSetStatus(pFirstRc, rc); +} + + +/** + * AMD-specific initialization code. + * + * @returns VBox status code (will only fail if out of memory). + */ +static int hmR0InitAmd(void) +{ + /* Call the global AMD-V initialization routine (should only fail in out-of-memory situations). */ + int rc = SVMR0GlobalInit(); + if (RT_SUCCESS(rc)) + { + /* + * Install the AMD-V methods. + */ + g_HmR0Ops = g_HmR0OpsSvm; + + /* Query AMD features. */ + uint32_t u32Dummy; + ASMCpuId(0x8000000a, &g_uHmSvmRev, &g_uHmMaxAsid, &u32Dummy, &g_fHmSvmFeatures); + + /* + * We need to check if AMD-V has been properly initialized on all CPUs. + * Some BIOSes might do a poor job. + */ + HMR0FIRSTRC FirstRc; + hmR0FirstRcInit(&FirstRc); + rc = RTMpOnAll(hmR0InitAmdCpu, &FirstRc, NULL); + AssertRC(rc); + if (RT_SUCCESS(rc)) + rc = hmR0FirstRcGetStatus(&FirstRc); +#ifndef DEBUG_bird + AssertMsg(rc == VINF_SUCCESS || rc == VERR_SVM_IN_USE, + ("hmR0InitAmdCpu failed for cpu %d with rc=%Rrc\n", hmR0FirstRcGetCpuId(&FirstRc), rc)); +#endif + if (RT_SUCCESS(rc)) + { + SUPR0GetHwvirtMsrs(&g_HmMsrs, SUPVTCAPS_AMD_V, false /* fForce */); + g_fHmSvmSupported = true; + } + else + { + g_rcHmInit = rc; + if (rc == VERR_SVM_DISABLED || rc == VERR_SVM_IN_USE) + rc = VINF_SUCCESS; /* Don't fail if AMD-V is disabled or in use. */ + } + } + else + g_rcHmInit = rc; + return rc; +} + + +/** + * Does global Ring-0 HM initialization (at module init). + * + * @returns VBox status code. + */ +VMMR0_INT_DECL(int) HMR0Init(void) +{ + /* + * Initialize the globals. + */ + g_fHmEnabled = false; + for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++) + { + g_aHmCpuInfo[i].idCpu = NIL_RTCPUID; + g_aHmCpuInfo[i].hMemObj = NIL_RTR0MEMOBJ; + g_aHmCpuInfo[i].HCPhysMemObj = NIL_RTHCPHYS; + g_aHmCpuInfo[i].pvMemObj = NULL; +#ifdef VBOX_WITH_NESTED_HWVIRT_SVM + g_aHmCpuInfo[i].n.svm.hNstGstMsrpm = NIL_RTR0MEMOBJ; + g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = NIL_RTHCPHYS; + g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = NULL; +#endif + } + + /* Fill in all callbacks with placeholders. */ + g_HmR0Ops = g_HmR0OpsDummy; + + /* Default is global VT-x/AMD-V init. */ + g_fHmGlobalInit = true; + + g_fHmVmxSupported = false; + g_fHmSvmSupported = false; + g_uHmMaxAsid = 0; + + /* + * Get host kernel features that HM might need to know in order + * to co-operate and function properly with the host OS (e.g. SMAP). + */ + g_fHmHostKernelFeatures = SUPR0GetKernelFeatures(); + + /* + * Make sure aCpuInfo is big enough for all the CPUs on this system. + */ + if (RTMpGetArraySize() > RT_ELEMENTS(g_aHmCpuInfo)) + { + LogRel(("HM: Too many real CPUs/cores/threads - %u, max %u\n", RTMpGetArraySize(), RT_ELEMENTS(g_aHmCpuInfo))); + return VERR_TOO_MANY_CPUS; + } + + /* + * Check for VT-x or AMD-V support. + * Return failure only in out-of-memory situations. + */ + uint32_t fCaps = 0; + int rc = SUPR0GetVTSupport(&fCaps); + if (RT_SUCCESS(rc)) + { + if (fCaps & SUPVTCAPS_VT_X) + rc = hmR0InitIntel(); + else + { + Assert(fCaps & SUPVTCAPS_AMD_V); + rc = hmR0InitAmd(); + } + if (RT_SUCCESS(rc)) + { + /* + * Register notification callbacks that we can use to disable/enable CPUs + * when brought offline/online or suspending/resuming. + */ + if (!g_fHmVmxUsingSUPR0EnableVTx) + { + rc = RTMpNotificationRegister(hmR0MpEventCallback, NULL); + if (RT_SUCCESS(rc)) + { + rc = RTPowerNotificationRegister(hmR0PowerCallback, NULL); + if (RT_FAILURE(rc)) + RTMpNotificationDeregister(hmR0MpEventCallback, NULL); + } + if (RT_FAILURE(rc)) + { + /* There shouldn't be any per-cpu allocations at this point, + so just have to call SVMR0GlobalTerm and VMXR0GlobalTerm. */ + if (fCaps & SUPVTCAPS_VT_X) + VMXR0GlobalTerm(); + else + SVMR0GlobalTerm(); + g_HmR0Ops = g_HmR0OpsDummy; + g_rcHmInit = rc; + g_fHmSvmSupported = false; + g_fHmVmxSupported = false; + } + } + } + } + else + { + g_rcHmInit = rc; + rc = VINF_SUCCESS; /* We return success here because module init shall not fail if HM fails to initialize. */ + } + return rc; +} + + +/** + * Does global Ring-0 HM termination (at module termination). + * + * @returns VBox status code (ignored). + */ +VMMR0_INT_DECL(int) HMR0Term(void) +{ + int rc; + if ( g_fHmVmxSupported + && g_fHmVmxUsingSUPR0EnableVTx) + { + /* + * Simple if the host OS manages VT-x. + */ + Assert(g_fHmGlobalInit); + + if (g_fHmVmxCalledSUPR0EnableVTx) + { + rc = SUPR0EnableVTx(false /* fEnable */); + g_fHmVmxCalledSUPR0EnableVTx = false; + } + else + rc = VINF_SUCCESS; + + for (unsigned iCpu = 0; iCpu < RT_ELEMENTS(g_aHmCpuInfo); iCpu++) + { + g_aHmCpuInfo[iCpu].fConfigured = false; + Assert(g_aHmCpuInfo[iCpu].hMemObj == NIL_RTR0MEMOBJ); + } + } + else + { + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + + /* Doesn't really matter if this fails. */ + RTMpNotificationDeregister(hmR0MpEventCallback, NULL); + RTPowerNotificationDeregister(hmR0PowerCallback, NULL); + rc = VINF_SUCCESS; + + /* + * Disable VT-x/AMD-V on all CPUs if we enabled it before. + */ + if (g_fHmGlobalInit) + { + HMR0FIRSTRC FirstRc; + hmR0FirstRcInit(&FirstRc); + rc = RTMpOnAll(hmR0DisableCpuCallback, NULL /* pvUser 1 */, &FirstRc); + Assert(RT_SUCCESS(rc) || rc == VERR_NOT_SUPPORTED); + if (RT_SUCCESS(rc)) + rc = hmR0FirstRcGetStatus(&FirstRc); + } + + /* + * Free the per-cpu pages used for VT-x and AMD-V. + */ + for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++) + { + if (g_aHmCpuInfo[i].hMemObj != NIL_RTR0MEMOBJ) + { + RTR0MemObjFree(g_aHmCpuInfo[i].hMemObj, false); + g_aHmCpuInfo[i].hMemObj = NIL_RTR0MEMOBJ; + g_aHmCpuInfo[i].HCPhysMemObj = NIL_RTHCPHYS; + g_aHmCpuInfo[i].pvMemObj = NULL; + } +#ifdef VBOX_WITH_NESTED_HWVIRT_SVM + if (g_aHmCpuInfo[i].n.svm.hNstGstMsrpm != NIL_RTR0MEMOBJ) + { + RTR0MemObjFree(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, false); + g_aHmCpuInfo[i].n.svm.hNstGstMsrpm = NIL_RTR0MEMOBJ; + g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = NIL_RTHCPHYS; + g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = NULL; + } +#endif + } + } + + /** @todo This needs cleaning up. There's no matching + * hmR0TermIntel()/hmR0TermAmd() and all the VT-x/AMD-V specific bits + * should move into their respective modules. */ + /* Finally, call global VT-x/AMD-V termination. */ + if (g_fHmVmxSupported) + VMXR0GlobalTerm(); + else if (g_fHmSvmSupported) + SVMR0GlobalTerm(); + + return rc; +} + + +/** + * Enable VT-x or AMD-V on the current CPU + * + * @returns VBox status code. + * @param pVM The cross context VM structure. Can be NULL. + * @param idCpu The identifier for the CPU the function is called on. + * + * @remarks Maybe called with interrupts disabled! + */ +static int hmR0EnableCpu(PVMCC pVM, RTCPUID idCpu) +{ + PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu]; + + Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */ + Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo)); + Assert(!pHostCpu->fConfigured); + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + + pHostCpu->idCpu = idCpu; + /* Do NOT reset cTlbFlushes here, see @bugref{6255}. */ + + int rc; + if ( g_fHmVmxSupported + && g_fHmVmxUsingSUPR0EnableVTx) + rc = g_HmR0Ops.pfnEnableCpu(pHostCpu, pVM, NULL /* pvCpuPage */, NIL_RTHCPHYS, true, &g_HmMsrs); + else + { + AssertLogRelMsgReturn(pHostCpu->hMemObj != NIL_RTR0MEMOBJ, ("hmR0EnableCpu failed idCpu=%u.\n", idCpu), VERR_HM_IPE_1); + rc = g_HmR0Ops.pfnEnableCpu(pHostCpu, pVM, pHostCpu->pvMemObj, pHostCpu->HCPhysMemObj, false, &g_HmMsrs); + } + if (RT_SUCCESS(rc)) + pHostCpu->fConfigured = true; + return rc; +} + + +/** + * Worker function passed to RTMpOnAll() that is to be called on all CPUs. + * + * @param idCpu The identifier for the CPU the function is called on. + * @param pvUser1 Opaque pointer to the VM (can be NULL!). + * @param pvUser2 The 2nd user argument. + */ +static DECLCALLBACK(void) hmR0EnableCpuCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2) +{ + PVMCC pVM = (PVMCC)pvUser1; /* can be NULL! */ + PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser2; + AssertReturnVoid(g_fHmGlobalInit); + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + hmR0FirstRcSetStatus(pFirstRc, hmR0EnableCpu(pVM, idCpu)); +} + + +/** + * RTOnce callback employed by HMR0EnableAllCpus. + * + * @returns VBox status code. + * @param pvUser Pointer to the VM. + */ +static DECLCALLBACK(int32_t) hmR0EnableAllCpuOnce(void *pvUser) +{ + PVMCC pVM = (PVMCC)pvUser; + + /* + * Indicate that we've initialized. + * + * Note! There is a potential race between this function and the suspend + * notification. Kind of unlikely though, so ignored for now. + */ + AssertReturn(!g_fHmEnabled, VERR_HM_ALREADY_ENABLED_IPE); + ASMAtomicWriteBool(&g_fHmEnabled, true); + + /* + * The global init variable is set by the first VM. + */ + g_fHmGlobalInit = pVM->hm.s.fGlobalInit; + +#ifdef VBOX_STRICT + for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++) + { + Assert(g_aHmCpuInfo[i].hMemObj == NIL_RTR0MEMOBJ); + Assert(g_aHmCpuInfo[i].HCPhysMemObj == NIL_RTHCPHYS); + Assert(g_aHmCpuInfo[i].pvMemObj == NULL); + Assert(!g_aHmCpuInfo[i].fConfigured); + Assert(!g_aHmCpuInfo[i].cTlbFlushes); + Assert(!g_aHmCpuInfo[i].uCurrentAsid); +# ifdef VBOX_WITH_NESTED_HWVIRT_SVM + Assert(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm == NIL_RTR0MEMOBJ); + Assert(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm == NIL_RTHCPHYS); + Assert(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm == NULL); +# endif + } +#endif + + int rc; + if ( g_fHmVmxSupported + && g_fHmVmxUsingSUPR0EnableVTx) + { + /* + * Global VT-x initialization API (only darwin for now). + */ + rc = SUPR0EnableVTx(true /* fEnable */); + if (RT_SUCCESS(rc)) + { + g_fHmVmxCalledSUPR0EnableVTx = true; + /* If the host provides a VT-x init API, then we'll rely on that for global init. */ + g_fHmGlobalInit = pVM->hm.s.fGlobalInit = true; + } + else + AssertMsgFailed(("hmR0EnableAllCpuOnce/SUPR0EnableVTx: rc=%Rrc\n", rc)); + } + else + { + /* + * We're doing the job ourselves. + */ + /* Allocate one page per cpu for the global VT-x and AMD-V pages */ + for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++) + { + Assert(g_aHmCpuInfo[i].hMemObj == NIL_RTR0MEMOBJ); +#ifdef VBOX_WITH_NESTED_HWVIRT_SVM + Assert(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm == NIL_RTR0MEMOBJ); +#endif + if (RTMpIsCpuPossible(RTMpCpuIdFromSetIndex(i))) + { + /** @todo NUMA */ + rc = RTR0MemObjAllocCont(&g_aHmCpuInfo[i].hMemObj, HOST_PAGE_SIZE, false /* executable R0 mapping */); + AssertLogRelRCReturn(rc, rc); + + g_aHmCpuInfo[i].HCPhysMemObj = RTR0MemObjGetPagePhysAddr(g_aHmCpuInfo[i].hMemObj, 0); + Assert(g_aHmCpuInfo[i].HCPhysMemObj != NIL_RTHCPHYS); + Assert(!(g_aHmCpuInfo[i].HCPhysMemObj & HOST_PAGE_OFFSET_MASK)); + + g_aHmCpuInfo[i].pvMemObj = RTR0MemObjAddress(g_aHmCpuInfo[i].hMemObj); + AssertPtr(g_aHmCpuInfo[i].pvMemObj); + RT_BZERO(g_aHmCpuInfo[i].pvMemObj, HOST_PAGE_SIZE); + +#ifdef VBOX_WITH_NESTED_HWVIRT_SVM + rc = RTR0MemObjAllocCont(&g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, SVM_MSRPM_PAGES << X86_PAGE_4K_SHIFT, + false /* executable R0 mapping */); + AssertLogRelRCReturn(rc, rc); + + g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = RTR0MemObjGetPagePhysAddr(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, 0); + Assert(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm != NIL_RTHCPHYS); + Assert(!(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm & HOST_PAGE_OFFSET_MASK)); + + g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = RTR0MemObjAddress(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm); + AssertPtr(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm); + ASMMemFill32(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm, SVM_MSRPM_PAGES << X86_PAGE_4K_SHIFT, UINT32_C(0xffffffff)); +#endif + } + } + + rc = VINF_SUCCESS; + } + + if ( RT_SUCCESS(rc) + && g_fHmGlobalInit) + { + /* + * It's possible we end up here with VMX (and perhaps SVM) not supported, see @bugref{9918}. + * In that case, our HMR0 function table contains the dummy placeholder functions which pretend + * success. However, we must not pretend success any longer (like we did during HMR0Init called + * during VMMR0 module init) as the HM init error code (g_rcHmInit) should be propagated to + * ring-3 especially since we now have a VM instance. + */ + if ( !g_fHmVmxSupported + && !g_fHmSvmSupported) + { + Assert(g_HmR0Ops.pfnEnableCpu == hmR0DummyEnableCpu); + Assert(RT_FAILURE(g_rcHmInit)); + rc = g_rcHmInit; + } + else + { + /* First time, so initialize each cpu/core. */ + HMR0FIRSTRC FirstRc; + hmR0FirstRcInit(&FirstRc); + rc = RTMpOnAll(hmR0EnableCpuCallback, (void *)pVM, &FirstRc); + if (RT_SUCCESS(rc)) + rc = hmR0FirstRcGetStatus(&FirstRc); + } + } + + return rc; +} + + +/** + * Sets up HM on all cpus. + * + * @returns VBox status code. + * @param pVM The cross context VM structure. + */ +VMMR0_INT_DECL(int) HMR0EnableAllCpus(PVMCC pVM) +{ + /* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */ + if (ASMAtomicReadBool(&g_fHmSuspended)) + return VERR_HM_SUSPEND_PENDING; + + return RTOnce(&g_HmEnableAllCpusOnce, hmR0EnableAllCpuOnce, pVM); +} + + +/** + * Disable VT-x or AMD-V on the current CPU. + * + * @returns VBox status code. + * @param idCpu The identifier for the CPU this function is called on. + * + * @remarks Must be called with preemption disabled. + */ +static int hmR0DisableCpu(RTCPUID idCpu) +{ + PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu]; + + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */ + Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo)); + Assert(!pHostCpu->fConfigured || pHostCpu->hMemObj != NIL_RTR0MEMOBJ); + AssertRelease(idCpu == RTMpCpuId()); + + if (pHostCpu->hMemObj == NIL_RTR0MEMOBJ) + return pHostCpu->fConfigured ? VERR_NO_MEMORY : VINF_SUCCESS /* not initialized. */; + AssertPtr(pHostCpu->pvMemObj); + Assert(pHostCpu->HCPhysMemObj != NIL_RTHCPHYS); + + int rc; + if (pHostCpu->fConfigured) + { + rc = g_HmR0Ops.pfnDisableCpu(pHostCpu, pHostCpu->pvMemObj, pHostCpu->HCPhysMemObj); + AssertRCReturn(rc, rc); + + pHostCpu->fConfigured = false; + pHostCpu->idCpu = NIL_RTCPUID; + } + else + rc = VINF_SUCCESS; /* nothing to do */ + return rc; +} + + +/** + * Worker function passed to RTMpOnAll() that is to be called on the target + * CPUs. + * + * @param idCpu The identifier for the CPU the function is called on. + * @param pvUser1 The 1st user argument. + * @param pvUser2 Opaque pointer to the FirstRc. + */ +static DECLCALLBACK(void) hmR0DisableCpuCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2) +{ + PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser2; NOREF(pvUser1); + AssertReturnVoid(g_fHmGlobalInit); + hmR0FirstRcSetStatus(pFirstRc, hmR0DisableCpu(idCpu)); +} + + +/** + * Worker function passed to RTMpOnSpecific() that is to be called on the target + * CPU. + * + * @param idCpu The identifier for the CPU the function is called on. + * @param pvUser1 Null, not used. + * @param pvUser2 Null, not used. + */ +static DECLCALLBACK(void) hmR0DisableCpuOnSpecificCallback(RTCPUID idCpu, void *pvUser1, void *pvUser2) +{ + NOREF(pvUser1); + NOREF(pvUser2); + hmR0DisableCpu(idCpu); +} + + +/** + * Callback function invoked when a cpu goes online or offline. + * + * @param enmEvent The Mp event. + * @param idCpu The identifier for the CPU the function is called on. + * @param pvData Opaque data (PVMCC pointer). + */ +static DECLCALLBACK(void) hmR0MpEventCallback(RTMPEVENT enmEvent, RTCPUID idCpu, void *pvData) +{ + NOREF(pvData); + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + + /* + * We only care about uninitializing a CPU that is going offline. When a + * CPU comes online, the initialization is done lazily in HMR0Enter(). + */ + switch (enmEvent) + { + case RTMPEVENT_OFFLINE: + { + RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; + RTThreadPreemptDisable(&PreemptState); + if (idCpu == RTMpCpuId()) + { + int rc = hmR0DisableCpu(idCpu); + AssertRC(rc); + RTThreadPreemptRestore(&PreemptState); + } + else + { + RTThreadPreemptRestore(&PreemptState); + RTMpOnSpecific(idCpu, hmR0DisableCpuOnSpecificCallback, NULL /* pvUser1 */, NULL /* pvUser2 */); + } + break; + } + + default: + break; + } +} + + +/** + * Called whenever a system power state change occurs. + * + * @param enmEvent The Power event. + * @param pvUser User argument. + */ +static DECLCALLBACK(void) hmR0PowerCallback(RTPOWEREVENT enmEvent, void *pvUser) +{ + NOREF(pvUser); + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + +#ifdef LOG_ENABLED + if (enmEvent == RTPOWEREVENT_SUSPEND) + SUPR0Printf("hmR0PowerCallback RTPOWEREVENT_SUSPEND\n"); + else + SUPR0Printf("hmR0PowerCallback RTPOWEREVENT_RESUME\n"); +#endif + + if (enmEvent == RTPOWEREVENT_SUSPEND) + ASMAtomicWriteBool(&g_fHmSuspended, true); + + if (g_fHmEnabled) + { + int rc; + HMR0FIRSTRC FirstRc; + hmR0FirstRcInit(&FirstRc); + + if (enmEvent == RTPOWEREVENT_SUSPEND) + { + if (g_fHmGlobalInit) + { + /* Turn off VT-x or AMD-V on all CPUs. */ + rc = RTMpOnAll(hmR0DisableCpuCallback, NULL /* pvUser 1 */, &FirstRc); + Assert(RT_SUCCESS(rc) || rc == VERR_NOT_SUPPORTED); + } + /* else nothing to do here for the local init case */ + } + else + { + /* Reinit the CPUs from scratch as the suspend state might have + messed with the MSRs. (lousy BIOSes as usual) */ + if (g_fHmVmxSupported) + rc = RTMpOnAll(hmR0InitIntelCpu, &FirstRc, NULL); + else + rc = RTMpOnAll(hmR0InitAmdCpu, &FirstRc, NULL); + Assert(RT_SUCCESS(rc) || rc == VERR_NOT_SUPPORTED); + if (RT_SUCCESS(rc)) + rc = hmR0FirstRcGetStatus(&FirstRc); +#ifdef LOG_ENABLED + if (RT_FAILURE(rc)) + SUPR0Printf("hmR0PowerCallback hmR0InitXxxCpu failed with %Rc\n", rc); +#endif + if (g_fHmGlobalInit) + { + /* Turn VT-x or AMD-V back on on all CPUs. */ + rc = RTMpOnAll(hmR0EnableCpuCallback, NULL /* pVM */, &FirstRc /* output ignored */); + Assert(RT_SUCCESS(rc) || rc == VERR_NOT_SUPPORTED); + } + /* else nothing to do here for the local init case */ + } + } + + if (enmEvent == RTPOWEREVENT_RESUME) + ASMAtomicWriteBool(&g_fHmSuspended, false); +} + + +/** + * Does ring-0 per-VM HM initialization. + * + * This will call the CPU specific init. routine which may initialize and allocate + * resources for virtual CPUs. + * + * @returns VBox status code. + * @param pVM The cross context VM structure. + * + * @remarks This is called after HMR3Init(), see vmR3CreateU() and + * vmR3InitRing3(). + */ +VMMR0_INT_DECL(int) HMR0InitVM(PVMCC pVM) +{ + AssertCompile(sizeof(pVM->hm.s) <= sizeof(pVM->hm.padding)); + AssertCompile(sizeof(pVM->hmr0.s) <= sizeof(pVM->hmr0.padding)); + AssertCompile(sizeof(pVM->aCpus[0].hm.s) <= sizeof(pVM->aCpus[0].hm.padding)); + AssertCompile(sizeof(pVM->aCpus[0].hmr0.s) <= sizeof(pVM->aCpus[0].hmr0.padding)); + AssertReturn(pVM, VERR_INVALID_PARAMETER); + + /* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */ + if (ASMAtomicReadBool(&g_fHmSuspended)) + return VERR_HM_SUSPEND_PENDING; + + /* + * Copy globals to the VM structure. + */ + Assert(!(pVM->hm.s.vmx.fSupported && pVM->hm.s.svm.fSupported)); + if (pVM->hm.s.vmx.fSupported) + { + pVM->hmr0.s.vmx.fUsePreemptTimer = pVM->hm.s.vmx.fUsePreemptTimerCfg && g_fHmVmxUsePreemptTimer; + pVM->hm.s.vmx.fUsePreemptTimerCfg = pVM->hmr0.s.vmx.fUsePreemptTimer; + pVM->hm.s.vmx.cPreemptTimerShift = g_cHmVmxPreemptTimerShift; + pVM->hm.s.ForR3.vmx.u64HostCr4 = g_uHmVmxHostCr4; + pVM->hm.s.ForR3.vmx.u64HostMsrEfer = g_uHmVmxHostMsrEfer; + pVM->hm.s.ForR3.vmx.u64HostSmmMonitorCtl = g_uHmVmxHostSmmMonitorCtl; + pVM->hm.s.ForR3.vmx.u64HostFeatCtrl = g_HmMsrs.u.vmx.u64FeatCtrl; + HMGetVmxMsrsFromHwvirtMsrs(&g_HmMsrs, &pVM->hm.s.ForR3.vmx.Msrs); + /* If you need to tweak host MSRs for testing VMX R0 code, do it here. */ + + /* Enable VPID if supported and configured. */ + if (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VPID) + pVM->hm.s.ForR3.vmx.fVpid = pVM->hmr0.s.vmx.fVpid = pVM->hm.s.vmx.fAllowVpid; /* Can be overridden by CFGM in HMR3Init(). */ + + /* Use VMCS shadowing if supported. */ + pVM->hmr0.s.vmx.fUseVmcsShadowing = pVM->cpum.ro.GuestFeatures.fVmx + && (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VMCS_SHADOWING); + pVM->hm.s.ForR3.vmx.fUseVmcsShadowing = pVM->hmr0.s.vmx.fUseVmcsShadowing; + + /* Use the VMCS controls for swapping the EFER MSR if supported. */ + pVM->hm.s.ForR3.vmx.fSupportsVmcsEfer = g_fHmVmxSupportsVmcsEfer; + +#if 0 + /* Enable APIC register virtualization and virtual-interrupt delivery if supported. */ + if ( (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_APIC_REG_VIRT) + && (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VIRT_INTR_DELIVERY)) + pVM->hm.s.fVirtApicRegs = true; + + /* Enable posted-interrupt processing if supported. */ + /** @todo Add and query IPRT API for host OS support for posted-interrupt IPI + * here. */ + if ( (g_HmMsrs.u.vmx.PinCtls.n.allowed1 & VMX_PIN_CTLS_POSTED_INT) + && (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_ACK_EXT_INT)) + pVM->hm.s.fPostedIntrs = true; +#endif + } + else if (pVM->hm.s.svm.fSupported) + { + pVM->hm.s.ForR3.svm.u32Rev = g_uHmSvmRev; + pVM->hm.s.ForR3.svm.fFeatures = g_fHmSvmFeatures; + pVM->hm.s.ForR3.svm.u64MsrHwcr = g_HmMsrs.u.svm.u64MsrHwcr; + /* If you need to tweak host MSRs for testing SVM R0 code, do it here. */ + } + pVM->hm.s.ForR3.rcInit = g_rcHmInit; + pVM->hm.s.ForR3.uMaxAsid = g_uHmMaxAsid; + + /* + * Set default maximum inner loops in ring-0 before returning to ring-3. + * Can be overriden using CFGM. + */ + uint32_t cMaxResumeLoops = pVM->hm.s.cMaxResumeLoopsCfg; + if (!cMaxResumeLoops) + { + cMaxResumeLoops = 1024; + if (RTThreadPreemptIsPendingTrusty()) + cMaxResumeLoops = 8192; + } + else if (cMaxResumeLoops > 16384) + cMaxResumeLoops = 16384; + else if (cMaxResumeLoops < 32) + cMaxResumeLoops = 32; + pVM->hm.s.cMaxResumeLoopsCfg = pVM->hmr0.s.cMaxResumeLoops = cMaxResumeLoops; + + /* + * Initialize some per-VCPU fields. + */ + for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++) + { + PVMCPUCC pVCpu = VMCC_GET_CPU(pVM, idCpu); + pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID; + pVCpu->hmr0.s.idLastCpu = NIL_RTCPUID; + + /* We'll aways increment this the first time (host uses ASID 0). */ + AssertReturn(!pVCpu->hmr0.s.uCurrentAsid, VERR_HM_IPE_3); + } + + /* + * Configure defences against spectre and other CPU bugs. + */ + uint32_t fWorldSwitcher = 0; + uint32_t cLastStdLeaf = ASMCpuId_EAX(0); + if (cLastStdLeaf >= 0x00000007 && RTX86IsValidStdRange(cLastStdLeaf)) + { + uint32_t uEdx = 0; + ASMCpuIdExSlow(0x00000007, 0, 0, 0, NULL, NULL, NULL, &uEdx); + + if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_IBRS_IBPB) + { + if (pVM->hm.s.fIbpbOnVmExit) + fWorldSwitcher |= HM_WSF_IBPB_EXIT; + if (pVM->hm.s.fIbpbOnVmEntry) + fWorldSwitcher |= HM_WSF_IBPB_ENTRY; + } + if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_FLUSH_CMD) + { + if (pVM->hm.s.fL1dFlushOnVmEntry) + fWorldSwitcher |= HM_WSF_L1D_ENTRY; + else if (pVM->hm.s.fL1dFlushOnSched) + fWorldSwitcher |= HM_WSF_L1D_SCHED; + } + if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_MD_CLEAR) + { + if (pVM->hm.s.fMdsClearOnVmEntry) + fWorldSwitcher |= HM_WSF_MDS_ENTRY; + else if (pVM->hm.s.fMdsClearOnSched) + fWorldSwitcher |= HM_WSF_MDS_SCHED; + } + } + for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++) + { + PVMCPUCC pVCpu = VMCC_GET_CPU(pVM, idCpu); + pVCpu->hmr0.s.fWorldSwitcher = fWorldSwitcher; + } + pVM->hm.s.ForR3.fWorldSwitcher = fWorldSwitcher; + + + /* + * Call the hardware specific initialization method. + */ + return g_HmR0Ops.pfnInitVM(pVM); +} + + +/** + * Does ring-0 per VM HM termination. + * + * @returns VBox status code. + * @param pVM The cross context VM structure. + */ +VMMR0_INT_DECL(int) HMR0TermVM(PVMCC pVM) +{ + Log(("HMR0TermVM: %p\n", pVM)); + AssertReturn(pVM, VERR_INVALID_PARAMETER); + + /* + * Call the hardware specific method. + * + * Note! We might be preparing for a suspend, so the pfnTermVM() functions should probably not + * mess with VT-x/AMD-V features on the CPU, currently all they do is free memory so this is safe. + */ + return g_HmR0Ops.pfnTermVM(pVM); +} + + +/** + * Sets up a VT-x or AMD-V session. + * + * This is mostly about setting up the hardware VM state. + * + * @returns VBox status code. + * @param pVM The cross context VM structure. + */ +VMMR0_INT_DECL(int) HMR0SetupVM(PVMCC pVM) +{ + Log(("HMR0SetupVM: %p\n", pVM)); + AssertReturn(pVM, VERR_INVALID_PARAMETER); + + /* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */ + AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING); + + /* On first entry we'll sync everything. */ + VMCC_FOR_EACH_VMCPU_STMT(pVM, pVCpu->hm.s.fCtxChanged |= HM_CHANGED_HOST_CONTEXT | HM_CHANGED_ALL_GUEST); + + /* + * Call the hardware specific setup VM method. This requires the CPU to be + * enabled for AMD-V/VT-x and preemption to be prevented. + */ + RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER; + RTThreadPreemptDisable(&PreemptState); + RTCPUID const idCpu = RTMpCpuId(); + + /* Enable VT-x or AMD-V if local init is required. */ + int rc; + if (!g_fHmGlobalInit) + { + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + rc = hmR0EnableCpu(pVM, idCpu); + if (RT_FAILURE(rc)) + { + RTThreadPreemptRestore(&PreemptState); + return rc; + } + } + + /* Setup VT-x or AMD-V. */ + rc = g_HmR0Ops.pfnSetupVM(pVM); + + /* Disable VT-x or AMD-V if local init was done before. */ + if (!g_fHmGlobalInit) + { + Assert(!g_fHmVmxSupported || !g_fHmVmxUsingSUPR0EnableVTx); + int rc2 = hmR0DisableCpu(idCpu); + AssertRC(rc2); + } + + RTThreadPreemptRestore(&PreemptState); + return rc; +} + + +/** + * Notification callback before an assertion longjump and guru mediation. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * @param pvUser User argument, currently unused, NULL. + */ +static DECLCALLBACK(int) hmR0AssertionCallback(PVMCPUCC pVCpu, void *pvUser) +{ + RT_NOREF(pvUser); + Assert(pVCpu); + Assert(g_HmR0Ops.pfnAssertionCallback); + return g_HmR0Ops.pfnAssertionCallback(pVCpu); +} + + +/** + * Turns on HM on the CPU if necessary and initializes the bare minimum state + * required for entering HM context. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * + * @remarks No-long-jump zone!!! + */ +VMMR0_INT_DECL(int) hmR0EnterCpu(PVMCPUCC pVCpu) +{ + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + + int rc = VINF_SUCCESS; + RTCPUID const idCpu = RTMpCpuId(); + PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu]; + AssertPtr(pHostCpu); + + /* Enable VT-x or AMD-V if local init is required, or enable if it's a freshly onlined CPU. */ + if (!pHostCpu->fConfigured) + rc = hmR0EnableCpu(pVCpu->CTX_SUFF(pVM), idCpu); + + /* Register a callback to fire prior to performing a longjmp to ring-3 so HM can disable VT-x/AMD-V if needed. */ + VMMR0AssertionSetNotification(pVCpu, hmR0AssertionCallback, NULL /*pvUser*/); + + /* Reload host-state (back from ring-3/migrated CPUs) and shared guest/host bits. */ + if (g_fHmVmxSupported) + pVCpu->hm.s.fCtxChanged |= HM_CHANGED_HOST_CONTEXT | HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE; + else + pVCpu->hm.s.fCtxChanged |= HM_CHANGED_HOST_CONTEXT | HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE; + + Assert(pHostCpu->idCpu == idCpu && pHostCpu->idCpu != NIL_RTCPUID); + pVCpu->hmr0.s.idEnteredCpu = idCpu; + return rc; +} + + +/** + * Enters the VT-x or AMD-V session. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * + * @remarks This is called with preemption disabled. + */ +VMMR0_INT_DECL(int) HMR0Enter(PVMCPUCC pVCpu) +{ + /* Make sure we can't enter a session after we've disabled HM in preparation of a suspend. */ + AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING); + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + + /* Load the bare minimum state required for entering HM. */ + int rc = hmR0EnterCpu(pVCpu); + if (RT_SUCCESS(rc)) + { + if (g_fHmVmxSupported) + Assert( (pVCpu->hm.s.fCtxChanged & (HM_CHANGED_HOST_CONTEXT | HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE)) + == (HM_CHANGED_HOST_CONTEXT | HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE)); + else + Assert( (pVCpu->hm.s.fCtxChanged & (HM_CHANGED_HOST_CONTEXT | HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE)) + == (HM_CHANGED_HOST_CONTEXT | HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE)); + + /* Keep track of the CPU owning the VMCS for debugging scheduling weirdness and ring-3 calls. */ + rc = g_HmR0Ops.pfnEnterSession(pVCpu); + AssertMsgRCReturnStmt(rc, ("rc=%Rrc pVCpu=%p\n", rc, pVCpu), pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID, rc); + + /* Exports the host-state as we may be resuming code after a longjmp and quite + possibly now be scheduled on a different CPU. */ + rc = g_HmR0Ops.pfnExportHostState(pVCpu); + AssertMsgRCReturnStmt(rc, ("rc=%Rrc pVCpu=%p\n", rc, pVCpu), pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID, rc); + } + return rc; +} + + +/** + * Deinitializes the bare minimum state used for HM context and if necessary + * disable HM on the CPU. + * + * @returns VBox status code. + * @param pVCpu The cross context virtual CPU structure. + * + * @remarks No-long-jump zone!!! + */ +VMMR0_INT_DECL(int) HMR0LeaveCpu(PVMCPUCC pVCpu) +{ + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + VMCPU_ASSERT_EMT_RETURN(pVCpu, VERR_HM_WRONG_CPU); + + RTCPUID const idCpu = RTMpCpuId(); + PCHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu]; + + if ( !g_fHmGlobalInit + && pHostCpu->fConfigured) + { + int rc = hmR0DisableCpu(idCpu); + AssertRCReturn(rc, rc); + Assert(!pHostCpu->fConfigured); + Assert(pHostCpu->idCpu == NIL_RTCPUID); + + /* For obtaining a non-zero ASID/VPID on next re-entry. */ + pVCpu->hmr0.s.idLastCpu = NIL_RTCPUID; + } + + /* Clear it while leaving HM context, hmPokeCpuForTlbFlush() relies on this. */ + pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID; + + /* De-register the longjmp-to-ring 3 callback now that we have reliquished hardware resources. */ + VMMR0AssertionRemoveNotification(pVCpu); + return VINF_SUCCESS; +} + + +/** + * Thread-context hook for HM. + * + * This is used together with RTThreadCtxHookCreate() on platforms which + * supports it, and directly from VMMR0EmtPrepareForBlocking() and + * VMMR0EmtResumeAfterBlocking() on platforms which don't. + * + * @param enmEvent The thread-context event. + * @param pvUser Opaque pointer to the VMCPU. + */ +VMMR0_INT_DECL(void) HMR0ThreadCtxCallback(RTTHREADCTXEVENT enmEvent, void *pvUser) +{ + PVMCPUCC pVCpu = (PVMCPUCC)pvUser; + Assert(pVCpu); + Assert(g_HmR0Ops.pfnThreadCtxCallback); + + g_HmR0Ops.pfnThreadCtxCallback(enmEvent, pVCpu, g_fHmGlobalInit); +} + + +/** + * Runs guest code in a hardware accelerated VM. + * + * @returns Strict VBox status code. (VBOXSTRICTRC isn't used because it's + * called from setjmp assembly.) + * @param pVM The cross context VM structure. + * @param pVCpu The cross context virtual CPU structure. + * + * @remarks Can be called with preemption enabled if thread-context hooks are + * used!!! + */ +VMMR0_INT_DECL(int) HMR0RunGuestCode(PVMCC pVM, PVMCPUCC pVCpu) +{ + RT_NOREF(pVM); + +#ifdef VBOX_STRICT + /* With thread-context hooks we would be running this code with preemption enabled. */ + if (!RTThreadPreemptIsEnabled(NIL_RTTHREAD)) + { + PCHMPHYSCPU pHostCpu = &g_aHmCpuInfo[RTMpCpuId()]; + Assert(!VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL)); + Assert(pHostCpu->fConfigured); + AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING); + } +#endif + + VBOXSTRICTRC rcStrict = g_HmR0Ops.pfnRunGuestCode(pVCpu); + return VBOXSTRICTRC_VAL(rcStrict); +} + + +/** + * Notification from CPUM that it has unloaded the guest FPU/SSE/AVX state from + * the host CPU and that guest access to it must be intercepted. + * + * @param pVCpu The cross context virtual CPU structure of the calling EMT. + */ +VMMR0_INT_DECL(void) HMR0NotifyCpumUnloadedGuestFpuState(PVMCPUCC pVCpu) +{ + ASMAtomicUoOrU64(&pVCpu->hm.s.fCtxChanged, HM_CHANGED_GUEST_CR0); +} + + +/** + * Notification from CPUM that it has modified the host CR0 (because of FPU). + * + * @param pVCpu The cross context virtual CPU structure of the calling EMT. + */ +VMMR0_INT_DECL(void) HMR0NotifyCpumModifiedHostCr0(PVMCPUCC pVCpu) +{ + ASMAtomicUoOrU64(&pVCpu->hm.s.fCtxChanged, HM_CHANGED_HOST_CONTEXT); +} + + +/** + * Returns suspend status of the host. + * + * @returns Suspend pending or not. + */ +VMMR0_INT_DECL(bool) HMR0SuspendPending(void) +{ + return ASMAtomicReadBool(&g_fHmSuspended); +} + + +/** + * Invalidates a guest page from the host TLB. + * + * @param pVCpu The cross context virtual CPU structure. + * @param GCVirt Page to invalidate. + */ +VMMR0_INT_DECL(int) HMR0InvalidatePage(PVMCPUCC pVCpu, RTGCPTR GCVirt) +{ + PVMCC pVM = pVCpu->CTX_SUFF(pVM); + if (pVM->hm.s.vmx.fSupported) + return VMXR0InvalidatePage(pVCpu, GCVirt); + return SVMR0InvalidatePage(pVCpu, GCVirt); +} + + +/** + * Returns the cpu structure for the current cpu. + * Keep in mind that there is no guarantee it will stay the same (long jumps to ring 3!!!). + * + * @returns The cpu structure pointer. + */ +VMMR0_INT_DECL(PHMPHYSCPU) hmR0GetCurrentCpu(void) +{ + Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); + RTCPUID const idCpu = RTMpCpuId(); + Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo)); + return &g_aHmCpuInfo[idCpu]; +} + + +/** + * Interface for importing state on demand (used by IEM). + * + * @returns VBox status code. + * @param pVCpu The cross context CPU structure. + * @param fWhat What to import, CPUMCTX_EXTRN_XXX. + */ +VMMR0_INT_DECL(int) HMR0ImportStateOnDemand(PVMCPUCC pVCpu, uint64_t fWhat) +{ + if (pVCpu->CTX_SUFF(pVM)->hm.s.vmx.fSupported) + return VMXR0ImportStateOnDemand(pVCpu, fWhat); + return SVMR0ImportStateOnDemand(pVCpu, fWhat); +} + + +/** + * Gets HM VM-exit auxiliary information. + * + * @returns VBox status code. + * @param pVCpu The cross context CPU structure. + * @param pHmExitAux Where to store the auxiliary info. + * @param fWhat What to get, see HMVMX_READ_XXX. This is ignored/unused + * on AMD-V. + * + * @remarks Currently this works only when executing a nested-guest using + * hardware-assisted execution as it's where the auxiliary information is + * required outside of HM. In the future we can make this available while + * executing a regular (non-nested) guest if necessary. + */ +VMMR0_INT_DECL(int) HMR0GetExitAuxInfo(PVMCPUCC pVCpu, PHMEXITAUX pHmExitAux, uint32_t fWhat) +{ + Assert(pHmExitAux); + Assert(!(fWhat & ~HMVMX_READ_VALID_MASK)); + if (pVCpu->CTX_SUFF(pVM)->hm.s.vmx.fSupported) + return VMXR0GetExitAuxInfo(pVCpu, &pHmExitAux->Vmx, fWhat); + return SVMR0GetExitAuxInfo(pVCpu, &pHmExitAux->Svm); +} + + +#ifdef VBOX_STRICT + +/** + * Dumps a descriptor. + * + * @param pDesc Descriptor to dump. + * @param Sel The selector. + * @param pszSel The name of the selector. + */ +VMMR0_INT_DECL(void) hmR0DumpDescriptor(PCX86DESCHC pDesc, RTSEL Sel, const char *pszSel) +{ + /* + * Make variable description string. + */ + static struct + { + unsigned cch; + const char *psz; + } const s_aTypes[32] = + { +# define STRENTRY(str) { sizeof(str) - 1, str } + + /* system */ +# if HC_ARCH_BITS == 64 + STRENTRY("Reserved0 "), /* 0x00 */ + STRENTRY("Reserved1 "), /* 0x01 */ + STRENTRY("LDT "), /* 0x02 */ + STRENTRY("Reserved3 "), /* 0x03 */ + STRENTRY("Reserved4 "), /* 0x04 */ + STRENTRY("Reserved5 "), /* 0x05 */ + STRENTRY("Reserved6 "), /* 0x06 */ + STRENTRY("Reserved7 "), /* 0x07 */ + STRENTRY("Reserved8 "), /* 0x08 */ + STRENTRY("TSS64Avail "), /* 0x09 */ + STRENTRY("ReservedA "), /* 0x0a */ + STRENTRY("TSS64Busy "), /* 0x0b */ + STRENTRY("Call64 "), /* 0x0c */ + STRENTRY("ReservedD "), /* 0x0d */ + STRENTRY("Int64 "), /* 0x0e */ + STRENTRY("Trap64 "), /* 0x0f */ +# else + STRENTRY("Reserved0 "), /* 0x00 */ + STRENTRY("TSS16Avail "), /* 0x01 */ + STRENTRY("LDT "), /* 0x02 */ + STRENTRY("TSS16Busy "), /* 0x03 */ + STRENTRY("Call16 "), /* 0x04 */ + STRENTRY("Task "), /* 0x05 */ + STRENTRY("Int16 "), /* 0x06 */ + STRENTRY("Trap16 "), /* 0x07 */ + STRENTRY("Reserved8 "), /* 0x08 */ + STRENTRY("TSS32Avail "), /* 0x09 */ + STRENTRY("ReservedA "), /* 0x0a */ + STRENTRY("TSS32Busy "), /* 0x0b */ + STRENTRY("Call32 "), /* 0x0c */ + STRENTRY("ReservedD "), /* 0x0d */ + STRENTRY("Int32 "), /* 0x0e */ + STRENTRY("Trap32 "), /* 0x0f */ +# endif + /* non system */ + STRENTRY("DataRO "), /* 0x10 */ + STRENTRY("DataRO Accessed "), /* 0x11 */ + STRENTRY("DataRW "), /* 0x12 */ + STRENTRY("DataRW Accessed "), /* 0x13 */ + STRENTRY("DataDownRO "), /* 0x14 */ + STRENTRY("DataDownRO Accessed "), /* 0x15 */ + STRENTRY("DataDownRW "), /* 0x16 */ + STRENTRY("DataDownRW Accessed "), /* 0x17 */ + STRENTRY("CodeEO "), /* 0x18 */ + STRENTRY("CodeEO Accessed "), /* 0x19 */ + STRENTRY("CodeER "), /* 0x1a */ + STRENTRY("CodeER Accessed "), /* 0x1b */ + STRENTRY("CodeConfEO "), /* 0x1c */ + STRENTRY("CodeConfEO Accessed "), /* 0x1d */ + STRENTRY("CodeConfER "), /* 0x1e */ + STRENTRY("CodeConfER Accessed ") /* 0x1f */ +# undef SYSENTRY + }; +# define ADD_STR(psz, pszAdd) do { strcpy(psz, pszAdd); psz += strlen(pszAdd); } while (0) + char szMsg[128]; + char *psz = &szMsg[0]; + unsigned i = pDesc->Gen.u1DescType << 4 | pDesc->Gen.u4Type; + memcpy(psz, s_aTypes[i].psz, s_aTypes[i].cch); + psz += s_aTypes[i].cch; + + if (pDesc->Gen.u1Present) + ADD_STR(psz, "Present "); + else + ADD_STR(psz, "Not-Present "); +# if HC_ARCH_BITS == 64 + if (pDesc->Gen.u1Long) + ADD_STR(psz, "64-bit "); + else + ADD_STR(psz, "Comp "); +# else + if (pDesc->Gen.u1Granularity) + ADD_STR(psz, "Page "); + if (pDesc->Gen.u1DefBig) + ADD_STR(psz, "32-bit "); + else + ADD_STR(psz, "16-bit "); +# endif +# undef ADD_STR + *psz = '\0'; + + /* + * Limit and Base and format the output. + */ +#ifdef LOG_ENABLED + uint32_t u32Limit = X86DESC_LIMIT_G(pDesc); + +# if HC_ARCH_BITS == 64 + uint64_t const u64Base = X86DESC64_BASE(pDesc); + Log((" %s { %#04x - %#RX64 %#RX64 - base=%#RX64 limit=%#08x dpl=%d } %s\n", pszSel, + Sel, pDesc->au64[0], pDesc->au64[1], u64Base, u32Limit, pDesc->Gen.u2Dpl, szMsg)); +# else + uint32_t const u32Base = X86DESC_BASE(pDesc); + Log((" %s { %#04x - %#08x %#08x - base=%#08x limit=%#08x dpl=%d } %s\n", pszSel, + Sel, pDesc->au32[0], pDesc->au32[1], u32Base, u32Limit, pDesc->Gen.u2Dpl, szMsg)); +# endif +#else + NOREF(Sel); NOREF(pszSel); +#endif +} + + +/** + * Formats a full register dump. + * + * @param pVCpu The cross context virtual CPU structure. + * @param fFlags The dumping flags (HM_DUMP_REG_FLAGS_XXX). + */ +VMMR0_INT_DECL(void) hmR0DumpRegs(PVMCPUCC pVCpu, uint32_t fFlags) +{ + /* + * Format the flags. + */ + static struct + { + const char *pszSet; + const char *pszClear; + uint32_t fFlag; + } const s_aFlags[] = + { + { "vip", NULL, X86_EFL_VIP }, + { "vif", NULL, X86_EFL_VIF }, + { "ac", NULL, X86_EFL_AC }, + { "vm", NULL, X86_EFL_VM }, + { "rf", NULL, X86_EFL_RF }, + { "nt", NULL, X86_EFL_NT }, + { "ov", "nv", X86_EFL_OF }, + { "dn", "up", X86_EFL_DF }, + { "ei", "di", X86_EFL_IF }, + { "tf", NULL, X86_EFL_TF }, + { "nt", "pl", X86_EFL_SF }, + { "nz", "zr", X86_EFL_ZF }, + { "ac", "na", X86_EFL_AF }, + { "po", "pe", X86_EFL_PF }, + { "cy", "nc", X86_EFL_CF }, + }; + char szEFlags[80]; + char *psz = szEFlags; + PCCPUMCTX pCtx = &pVCpu->cpum.GstCtx; + uint32_t fEFlags = pCtx->eflags.u; + for (unsigned i = 0; i < RT_ELEMENTS(s_aFlags); i++) + { + const char *pszAdd = s_aFlags[i].fFlag & fEFlags ? s_aFlags[i].pszSet : s_aFlags[i].pszClear; + if (pszAdd) + { + strcpy(psz, pszAdd); + psz += strlen(pszAdd); + *psz++ = ' '; + } + } + psz[-1] = '\0'; + + if (fFlags & HM_DUMP_REG_FLAGS_GPRS) + { + /* + * Format the registers. + */ + if (CPUMIsGuestIn64BitCode(pVCpu)) + Log(("rax=%016RX64 rbx=%016RX64 rcx=%016RX64 rdx=%016RX64\n" + "rsi=%016RX64 rdi=%016RX64 r8 =%016RX64 r9 =%016RX64\n" + "r10=%016RX64 r11=%016RX64 r12=%016RX64 r13=%016RX64\n" + "r14=%016RX64 r15=%016RX64\n" + "rip=%016RX64 rsp=%016RX64 rbp=%016RX64 iopl=%d %*s\n" + "cs={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "ds={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "es={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "fs={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "gs={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "ss={%04x base=%016RX64 limit=%08x flags=%08x}\n" + "cr0=%016RX64 cr2=%016RX64 cr3=%016RX64 cr4=%016RX64\n" + "dr0=%016RX64 dr1=%016RX64 dr2=%016RX64 dr3=%016RX64\n" + "dr4=%016RX64 dr5=%016RX64 dr6=%016RX64 dr7=%016RX64\n" + "gdtr=%016RX64:%04x idtr=%016RX64:%04x eflags=%08x\n" + "ldtr={%04x base=%08RX64 limit=%08x flags=%08x}\n" + "tr ={%04x base=%08RX64 limit=%08x flags=%08x}\n" + "SysEnter={cs=%04llx eip=%08llx esp=%08llx}\n" + , + pCtx->rax, pCtx->rbx, pCtx->rcx, pCtx->rdx, pCtx->rsi, pCtx->rdi, + pCtx->r8, pCtx->r9, pCtx->r10, pCtx->r11, pCtx->r12, pCtx->r13, + pCtx->r14, pCtx->r15, + pCtx->rip, pCtx->rsp, pCtx->rbp, X86_EFL_GET_IOPL(fEFlags), 31, szEFlags, + pCtx->cs.Sel, pCtx->cs.u64Base, pCtx->cs.u32Limit, pCtx->cs.Attr.u, + pCtx->ds.Sel, pCtx->ds.u64Base, pCtx->ds.u32Limit, pCtx->ds.Attr.u, + pCtx->es.Sel, pCtx->es.u64Base, pCtx->es.u32Limit, pCtx->es.Attr.u, + pCtx->fs.Sel, pCtx->fs.u64Base, pCtx->fs.u32Limit, pCtx->fs.Attr.u, + pCtx->gs.Sel, pCtx->gs.u64Base, pCtx->gs.u32Limit, pCtx->gs.Attr.u, + pCtx->ss.Sel, pCtx->ss.u64Base, pCtx->ss.u32Limit, pCtx->ss.Attr.u, + pCtx->cr0, pCtx->cr2, pCtx->cr3, pCtx->cr4, + pCtx->dr[0], pCtx->dr[1], pCtx->dr[2], pCtx->dr[3], + pCtx->dr[4], pCtx->dr[5], pCtx->dr[6], pCtx->dr[7], + pCtx->gdtr.pGdt, pCtx->gdtr.cbGdt, pCtx->idtr.pIdt, pCtx->idtr.cbIdt, fEFlags, + pCtx->ldtr.Sel, pCtx->ldtr.u64Base, pCtx->ldtr.u32Limit, pCtx->ldtr.Attr.u, + pCtx->tr.Sel, pCtx->tr.u64Base, pCtx->tr.u32Limit, pCtx->tr.Attr.u, + pCtx->SysEnter.cs, pCtx->SysEnter.eip, pCtx->SysEnter.esp)); + else + Log(("eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n" + "eip=%08x esp=%08x ebp=%08x iopl=%d %*s\n" + "cs={%04x base=%016RX64 limit=%08x flags=%08x} dr0=%08RX64 dr1=%08RX64\n" + "ds={%04x base=%016RX64 limit=%08x flags=%08x} dr2=%08RX64 dr3=%08RX64\n" + "es={%04x base=%016RX64 limit=%08x flags=%08x} dr4=%08RX64 dr5=%08RX64\n" + "fs={%04x base=%016RX64 limit=%08x flags=%08x} dr6=%08RX64 dr7=%08RX64\n" + "gs={%04x base=%016RX64 limit=%08x flags=%08x} cr0=%08RX64 cr2=%08RX64\n" + "ss={%04x base=%016RX64 limit=%08x flags=%08x} cr3=%08RX64 cr4=%08RX64\n" + "gdtr=%016RX64:%04x idtr=%016RX64:%04x eflags=%08x\n" + "ldtr={%04x base=%08RX64 limit=%08x flags=%08x}\n" + "tr ={%04x base=%08RX64 limit=%08x flags=%08x}\n" + "SysEnter={cs=%04llx eip=%08llx esp=%08llx}\n" + , + pCtx->eax, pCtx->ebx, pCtx->ecx, pCtx->edx, pCtx->esi, pCtx->edi, + pCtx->eip, pCtx->esp, pCtx->ebp, X86_EFL_GET_IOPL(fEFlags), 31, szEFlags, + pCtx->cs.Sel, pCtx->cs.u64Base, pCtx->cs.u32Limit, pCtx->cs.Attr.u, pCtx->dr[0], pCtx->dr[1], + pCtx->ds.Sel, pCtx->ds.u64Base, pCtx->ds.u32Limit, pCtx->ds.Attr.u, pCtx->dr[2], pCtx->dr[3], + pCtx->es.Sel, pCtx->es.u64Base, pCtx->es.u32Limit, pCtx->es.Attr.u, pCtx->dr[4], pCtx->dr[5], + pCtx->fs.Sel, pCtx->fs.u64Base, pCtx->fs.u32Limit, pCtx->fs.Attr.u, pCtx->dr[6], pCtx->dr[7], + pCtx->gs.Sel, pCtx->gs.u64Base, pCtx->gs.u32Limit, pCtx->gs.Attr.u, pCtx->cr0, pCtx->cr2, + pCtx->ss.Sel, pCtx->ss.u64Base, pCtx->ss.u32Limit, pCtx->ss.Attr.u, pCtx->cr3, pCtx->cr4, + pCtx->gdtr.pGdt, pCtx->gdtr.cbGdt, pCtx->idtr.pIdt, pCtx->idtr.cbIdt, fEFlags, + pCtx->ldtr.Sel, pCtx->ldtr.u64Base, pCtx->ldtr.u32Limit, pCtx->ldtr.Attr.u, + pCtx->tr.Sel, pCtx->tr.u64Base, pCtx->tr.u32Limit, pCtx->tr.Attr.u, + pCtx->SysEnter.cs, pCtx->SysEnter.eip, pCtx->SysEnter.esp)); + } + + if (fFlags & HM_DUMP_REG_FLAGS_FPU) + { + PCX86FXSTATE pFpuCtx = &pCtx->XState.x87; + Log(("FPU:\n" + "FCW=%04x FSW=%04x FTW=%02x\n" + "FOP=%04x FPUIP=%08x CS=%04x Rsrvd1=%04x\n" + "FPUDP=%04x DS=%04x Rsvrd2=%04x MXCSR=%08x MXCSR_MASK=%08x\n" + , + pFpuCtx->FCW, pFpuCtx->FSW, pFpuCtx->FTW, + pFpuCtx->FOP, pFpuCtx->FPUIP, pFpuCtx->CS, pFpuCtx->Rsrvd1, + pFpuCtx->FPUDP, pFpuCtx->DS, pFpuCtx->Rsrvd2, + pFpuCtx->MXCSR, pFpuCtx->MXCSR_MASK)); + NOREF(pFpuCtx); + } + + if (fFlags & HM_DUMP_REG_FLAGS_MSRS) + Log(("MSR:\n" + "EFER =%016RX64\n" + "PAT =%016RX64\n" + "STAR =%016RX64\n" + "CSTAR =%016RX64\n" + "LSTAR =%016RX64\n" + "SFMASK =%016RX64\n" + "KERNELGSBASE =%016RX64\n", + pCtx->msrEFER, + pCtx->msrPAT, + pCtx->msrSTAR, + pCtx->msrCSTAR, + pCtx->msrLSTAR, + pCtx->msrSFMASK, + pCtx->msrKERNELGSBASE)); +} + +#endif /* VBOX_STRICT */ + |