/* $Id: HMSVMR0.cpp 62606 2016-07-27 16:33:40Z vboxsync $ */ /** @file * HM SVM (AMD-V) - Host Context Ring-0. */ /* * Copyright (C) 2013-2016 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_HM #include #include #include #include #include #include #include #include #ifdef VBOX_WITH_NEW_APIC # include #endif #include "HMInternal.h" #include #include "HMSVMR0.h" #include "dtrace/VBoxVMM.h" #ifdef DEBUG_ramshankar # define HMSVM_SYNC_FULL_GUEST_STATE # define HMSVM_ALWAYS_TRAP_ALL_XCPTS # define HMSVM_ALWAYS_TRAP_PF # define HMSVM_ALWAYS_TRAP_TASK_SWITCH #endif /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ #ifdef VBOX_WITH_STATISTICS # define HMSVM_EXITCODE_STAM_COUNTER_INC(u64ExitCode) do { \ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitAll); \ if ((u64ExitCode) == SVM_EXIT_NPF) \ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitReasonNpf); \ else \ STAM_COUNTER_INC(&pVCpu->hm.s.paStatExitReasonR0[(u64ExitCode) & MASK_EXITREASON_STAT]); \ } while (0) #else # define HMSVM_EXITCODE_STAM_COUNTER_INC(u64ExitCode) do { } while (0) #endif /** If we decide to use a function table approach this can be useful to * switch to a "static DECLCALLBACK(int)". */ #define HMSVM_EXIT_DECL static int /** @name Segment attribute conversion between CPU and AMD-V VMCB format. * * The CPU format of the segment attribute is described in X86DESCATTRBITS * which is 16-bits (i.e. includes 4 bits of the segment limit). * * The AMD-V VMCB format the segment attribute is compact 12-bits (strictly * only the attribute bits and nothing else). Upper 4-bits are unused. * * @{ */ #define HMSVM_CPU_2_VMCB_SEG_ATTR(a) ( ((a) & 0xff) | (((a) & 0xf000) >> 4) ) #define HMSVM_VMCB_2_CPU_SEG_ATTR(a) ( ((a) & 0xff) | (((a) & 0x0f00) << 4) ) /** @} */ /** @name Macros for loading, storing segment registers to/from the VMCB. * @{ */ #define HMSVM_LOAD_SEG_REG(REG, reg) \ do \ { \ Assert(pCtx->reg.fFlags & CPUMSELREG_FLAGS_VALID); \ Assert(pCtx->reg.ValidSel == pCtx->reg.Sel); \ pVmcb->guest.REG.u16Sel = pCtx->reg.Sel; \ pVmcb->guest.REG.u32Limit = pCtx->reg.u32Limit; \ pVmcb->guest.REG.u64Base = pCtx->reg.u64Base; \ pVmcb->guest.REG.u16Attr = HMSVM_CPU_2_VMCB_SEG_ATTR(pCtx->reg.Attr.u); \ } while (0) #define HMSVM_SAVE_SEG_REG(REG, reg) \ do \ { \ pMixedCtx->reg.Sel = pVmcb->guest.REG.u16Sel; \ pMixedCtx->reg.ValidSel = pVmcb->guest.REG.u16Sel; \ pMixedCtx->reg.fFlags = CPUMSELREG_FLAGS_VALID; \ pMixedCtx->reg.u32Limit = pVmcb->guest.REG.u32Limit; \ pMixedCtx->reg.u64Base = pVmcb->guest.REG.u64Base; \ pMixedCtx->reg.Attr.u = HMSVM_VMCB_2_CPU_SEG_ATTR(pVmcb->guest.REG.u16Attr); \ } while (0) /** @} */ /** Macro for checking and returning from the using function for * \#VMEXIT intercepts that maybe caused during delivering of another * event in the guest. */ #define HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY() \ do \ { \ int rc = hmR0SvmCheckExitDueToEventDelivery(pVCpu, pCtx, pSvmTransient); \ if (RT_LIKELY(rc == VINF_SUCCESS)) { /* likely */ } \ else if (rc == VINF_HM_DOUBLE_FAULT) \ return VINF_SUCCESS; \ else \ return rc; \ } while (0) /** Macro for upgrading a @a a_rc to VINF_EM_DBG_STEPPED after emulating an * instruction that exited. */ #define HMSVM_CHECK_SINGLE_STEP(a_pVCpu, a_rc) \ do { \ if ((a_pVCpu)->hm.s.fSingleInstruction && (a_rc) == VINF_SUCCESS) \ (a_rc) = VINF_EM_DBG_STEPPED; \ } while (0) /** Assert that preemption is disabled or covered by thread-context hooks. */ #define HMSVM_ASSERT_PREEMPT_SAFE() Assert( VMMR0ThreadCtxHookIsEnabled(pVCpu) \ || !RTThreadPreemptIsEnabled(NIL_RTTHREAD)); /** Assert that we haven't migrated CPUs when thread-context hooks are not * used. */ #define HMSVM_ASSERT_CPU_SAFE() AssertMsg( VMMR0ThreadCtxHookIsEnabled(pVCpu) \ || pVCpu->hm.s.idEnteredCpu == RTMpCpuId(), \ ("Illegal migration! Entered on CPU %u Current %u\n", \ pVCpu->hm.s.idEnteredCpu, RTMpCpuId())); /** Exception bitmap mask for all contributory exceptions. * * Page fault is deliberately excluded here as it's conditional as to whether * it's contributory or benign. Page faults are handled separately. */ #define HMSVM_CONTRIBUTORY_XCPT_MASK ( RT_BIT(X86_XCPT_GP) | RT_BIT(X86_XCPT_NP) | RT_BIT(X86_XCPT_SS) | RT_BIT(X86_XCPT_TS) \ | RT_BIT(X86_XCPT_DE)) /** @name VMCB Clean Bits. * * These flags are used for VMCB-state caching. A set VMCB Clean bit indicates * AMD-V doesn't need to reload the corresponding value(s) from the VMCB in * memory. * * @{ */ /** All intercepts vectors, TSC offset, PAUSE filter counter. */ #define HMSVM_VMCB_CLEAN_INTERCEPTS RT_BIT(0) /** I/O permission bitmap, MSR permission bitmap. */ #define HMSVM_VMCB_CLEAN_IOPM_MSRPM RT_BIT(1) /** ASID. */ #define HMSVM_VMCB_CLEAN_ASID RT_BIT(2) /** TRP: V_TPR, V_IRQ, V_INTR_PRIO, V_IGN_TPR, V_INTR_MASKING, V_INTR_VECTOR. */ #define HMSVM_VMCB_CLEAN_TPR RT_BIT(3) /** Nested Paging: Nested CR3 (nCR3), PAT. */ #define HMSVM_VMCB_CLEAN_NP RT_BIT(4) /** Control registers (CR0, CR3, CR4, EFER). */ #define HMSVM_VMCB_CLEAN_CRX_EFER RT_BIT(5) /** Debug registers (DR6, DR7). */ #define HMSVM_VMCB_CLEAN_DRX RT_BIT(6) /** GDT, IDT limit and base. */ #define HMSVM_VMCB_CLEAN_DT RT_BIT(7) /** Segment register: CS, SS, DS, ES limit and base. */ #define HMSVM_VMCB_CLEAN_SEG RT_BIT(8) /** CR2.*/ #define HMSVM_VMCB_CLEAN_CR2 RT_BIT(9) /** Last-branch record (DbgCtlMsr, br_from, br_to, lastint_from, lastint_to) */ #define HMSVM_VMCB_CLEAN_LBR RT_BIT(10) /** AVIC (AVIC APIC_BAR; AVIC APIC_BACKING_PAGE, AVIC PHYSICAL_TABLE and AVIC LOGICAL_TABLE Pointers). */ #define HMSVM_VMCB_CLEAN_AVIC RT_BIT(11) /** Mask of all valid VMCB Clean bits. */ #define HMSVM_VMCB_CLEAN_ALL ( HMSVM_VMCB_CLEAN_INTERCEPTS \ | HMSVM_VMCB_CLEAN_IOPM_MSRPM \ | HMSVM_VMCB_CLEAN_ASID \ | HMSVM_VMCB_CLEAN_TPR \ | HMSVM_VMCB_CLEAN_NP \ | HMSVM_VMCB_CLEAN_CRX_EFER \ | HMSVM_VMCB_CLEAN_DRX \ | HMSVM_VMCB_CLEAN_DT \ | HMSVM_VMCB_CLEAN_SEG \ | HMSVM_VMCB_CLEAN_CR2 \ | HMSVM_VMCB_CLEAN_LBR \ | HMSVM_VMCB_CLEAN_AVIC) /** @} */ /** @name SVM transient. * * A state structure for holding miscellaneous information across AMD-V * VMRUN/\#VMEXIT operation, restored after the transition. * * @{ */ typedef struct SVMTRANSIENT { /** The host's rflags/eflags. */ RTCCUINTREG fEFlags; #if HC_ARCH_BITS == 32 uint32_t u32Alignment0; #endif /** The \#VMEXIT exit code (the EXITCODE field in the VMCB). */ uint64_t u64ExitCode; /** The guest's TPR value used for TPR shadowing. */ uint8_t u8GuestTpr; /** Alignment. */ uint8_t abAlignment0[7]; /** Whether the guest FPU state was active at the time of \#VMEXIT. */ bool fWasGuestFPUStateActive; /** Whether the guest debug state was active at the time of \#VMEXIT. */ bool fWasGuestDebugStateActive; /** Whether the hyper debug state was active at the time of \#VMEXIT. */ bool fWasHyperDebugStateActive; /** Whether the TSC offset mode needs to be updated. */ bool fUpdateTscOffsetting; /** Whether the TSC_AUX MSR needs restoring on \#VMEXIT. */ bool fRestoreTscAuxMsr; /** Whether the \#VMEXIT was caused by a page-fault during delivery of a * contributary exception or a page-fault. */ bool fVectoringDoublePF; /** Whether the \#VMEXIT was caused by a page-fault during delivery of an * external interrupt or NMI. */ bool fVectoringPF; } SVMTRANSIENT, *PSVMTRANSIENT; AssertCompileMemberAlignment(SVMTRANSIENT, u64ExitCode, sizeof(uint64_t)); AssertCompileMemberAlignment(SVMTRANSIENT, fWasGuestFPUStateActive, sizeof(uint64_t)); /** @} */ /** * MSRPM (MSR permission bitmap) read permissions (for guest RDMSR). */ typedef enum SVMMSREXITREAD { /** Reading this MSR causes a \#VMEXIT. */ SVMMSREXIT_INTERCEPT_READ = 0xb, /** Reading this MSR does not cause a \#VMEXIT. */ SVMMSREXIT_PASSTHRU_READ } SVMMSREXITREAD; /** * MSRPM (MSR permission bitmap) write permissions (for guest WRMSR). */ typedef enum SVMMSREXITWRITE { /** Writing to this MSR causes a \#VMEXIT. */ SVMMSREXIT_INTERCEPT_WRITE = 0xd, /** Writing to this MSR does not cause a \#VMEXIT. */ SVMMSREXIT_PASSTHRU_WRITE } SVMMSREXITWRITE; /** * SVM \#VMEXIT handler. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pMixedCtx Pointer to the guest-CPU context. * @param pSvmTransient Pointer to the SVM-transient structure. */ typedef int FNSVMEXITHANDLER(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient); /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ static void hmR0SvmSetMsrPermission(PVMCPU pVCpu, unsigned uMsr, SVMMSREXITREAD enmRead, SVMMSREXITWRITE enmWrite); static void hmR0SvmPendingEventToTrpmTrap(PVMCPU pVCpu); static void hmR0SvmLeave(PVMCPU pVCpu); /** @name \#VMEXIT handlers. * @{ */ static FNSVMEXITHANDLER hmR0SvmExitIntr; static FNSVMEXITHANDLER hmR0SvmExitWbinvd; static FNSVMEXITHANDLER hmR0SvmExitInvd; static FNSVMEXITHANDLER hmR0SvmExitCpuid; static FNSVMEXITHANDLER hmR0SvmExitRdtsc; static FNSVMEXITHANDLER hmR0SvmExitRdtscp; static FNSVMEXITHANDLER hmR0SvmExitRdpmc; static FNSVMEXITHANDLER hmR0SvmExitInvlpg; static FNSVMEXITHANDLER hmR0SvmExitHlt; static FNSVMEXITHANDLER hmR0SvmExitMonitor; static FNSVMEXITHANDLER hmR0SvmExitMwait; static FNSVMEXITHANDLER hmR0SvmExitShutdown; static FNSVMEXITHANDLER hmR0SvmExitReadCRx; static FNSVMEXITHANDLER hmR0SvmExitWriteCRx; static FNSVMEXITHANDLER hmR0SvmExitSetPendingXcptUD; static FNSVMEXITHANDLER hmR0SvmExitMsr; static FNSVMEXITHANDLER hmR0SvmExitReadDRx; static FNSVMEXITHANDLER hmR0SvmExitWriteDRx; static FNSVMEXITHANDLER hmR0SvmExitXsetbv; static FNSVMEXITHANDLER hmR0SvmExitIOInstr; static FNSVMEXITHANDLER hmR0SvmExitNestedPF; static FNSVMEXITHANDLER hmR0SvmExitVIntr; static FNSVMEXITHANDLER hmR0SvmExitTaskSwitch; static FNSVMEXITHANDLER hmR0SvmExitVmmCall; static FNSVMEXITHANDLER hmR0SvmExitPause; static FNSVMEXITHANDLER hmR0SvmExitIret; static FNSVMEXITHANDLER hmR0SvmExitXcptPF; static FNSVMEXITHANDLER hmR0SvmExitXcptNM; static FNSVMEXITHANDLER hmR0SvmExitXcptUD; static FNSVMEXITHANDLER hmR0SvmExitXcptMF; static FNSVMEXITHANDLER hmR0SvmExitXcptDB; static FNSVMEXITHANDLER hmR0SvmExitXcptAC; /** @} */ DECLINLINE(int) hmR0SvmHandleExit(PVMCPU pVCpu, PCPUMCTX pMixedCtx, PSVMTRANSIENT pSvmTransient); /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** Ring-0 memory object for the IO bitmap. */ RTR0MEMOBJ g_hMemObjIOBitmap = NIL_RTR0MEMOBJ; /** Physical address of the IO bitmap. */ RTHCPHYS g_HCPhysIOBitmap = 0; /** Virtual address of the IO bitmap. */ R0PTRTYPE(void *) g_pvIOBitmap = NULL; /** * Sets up and activates AMD-V on the current CPU. * * @returns VBox status code. * @param pCpu Pointer to the CPU info struct. * @param pVM The cross context VM structure. Can be * NULL after a resume! * @param pvCpuPage Pointer to the global CPU page. * @param HCPhysCpuPage Physical address of the global CPU page. * @param fEnabledByHost Whether the host OS has already initialized AMD-V. * @param pvArg Unused on AMD-V. */ VMMR0DECL(int) SVMR0EnableCpu(PHMGLOBALCPUINFO pCpu, PVM pVM, void *pvCpuPage, RTHCPHYS HCPhysCpuPage, bool fEnabledByHost, void *pvArg) { Assert(!fEnabledByHost); Assert(HCPhysCpuPage && HCPhysCpuPage != NIL_RTHCPHYS); Assert(RT_ALIGN_T(HCPhysCpuPage, _4K, RTHCPHYS) == HCPhysCpuPage); Assert(pvCpuPage); NOREF(pvCpuPage); Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); NOREF(pvArg); NOREF(fEnabledByHost); /* Paranoid: Disable interrupt as, in theory, interrupt handlers might mess with EFER. */ RTCCUINTREG fEFlags = ASMIntDisableFlags(); /* * We must turn on AMD-V and setup the host state physical address, as those MSRs are per CPU. */ uint64_t u64HostEfer = ASMRdMsr(MSR_K6_EFER); if (u64HostEfer & MSR_K6_EFER_SVME) { /* If the VBOX_HWVIRTEX_IGNORE_SVM_IN_USE is active, then we blindly use AMD-V. */ if ( pVM && pVM->hm.s.svm.fIgnoreInUseError) { pCpu->fIgnoreAMDVInUseError = true; } if (!pCpu->fIgnoreAMDVInUseError) { ASMSetFlags(fEFlags); return VERR_SVM_IN_USE; } } /* Turn on AMD-V in the EFER MSR. */ ASMWrMsr(MSR_K6_EFER, u64HostEfer | MSR_K6_EFER_SVME); /* Write the physical page address where the CPU will store the host state while executing the VM. */ ASMWrMsr(MSR_K8_VM_HSAVE_PA, HCPhysCpuPage); /* Restore interrupts. */ ASMSetFlags(fEFlags); /* * Theoretically, other hypervisors may have used ASIDs, ideally we should flush all non-zero ASIDs * when enabling SVM. AMD doesn't have an SVM instruction to flush all ASIDs (flushing is done * upon VMRUN). Therefore, just set the fFlushAsidBeforeUse flag which instructs hmR0SvmSetupTLB() * to flush the TLB with before using a new ASID. */ pCpu->fFlushAsidBeforeUse = true; /* * Ensure each VCPU scheduled on this CPU gets a new VPID on resume. See @bugref{6255}. */ ++pCpu->cTlbFlushes; return VINF_SUCCESS; } /** * Deactivates AMD-V on the current CPU. * * @returns VBox status code. * @param pCpu Pointer to the CPU info struct. * @param pvCpuPage Pointer to the global CPU page. * @param HCPhysCpuPage Physical address of the global CPU page. */ VMMR0DECL(int) SVMR0DisableCpu(PHMGLOBALCPUINFO pCpu, void *pvCpuPage, RTHCPHYS HCPhysCpuPage) { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); AssertReturn( HCPhysCpuPage && HCPhysCpuPage != NIL_RTHCPHYS, VERR_INVALID_PARAMETER); AssertReturn(pvCpuPage, VERR_INVALID_PARAMETER); NOREF(pCpu); /* Paranoid: Disable interrupts as, in theory, interrupt handlers might mess with EFER. */ RTCCUINTREG fEFlags = ASMIntDisableFlags(); /* Turn off AMD-V in the EFER MSR. */ uint64_t u64HostEfer = ASMRdMsr(MSR_K6_EFER); ASMWrMsr(MSR_K6_EFER, u64HostEfer & ~MSR_K6_EFER_SVME); /* Invalidate host state physical address. */ ASMWrMsr(MSR_K8_VM_HSAVE_PA, 0); /* Restore interrupts. */ ASMSetFlags(fEFlags); return VINF_SUCCESS; } /** * Does global AMD-V initialization (called during module initialization). * * @returns VBox status code. */ VMMR0DECL(int) SVMR0GlobalInit(void) { /* * Allocate 12 KB for the IO bitmap. Since this is non-optional and we always intercept all IO accesses, it's done * once globally here instead of per-VM. */ Assert(g_hMemObjIOBitmap == NIL_RTR0MEMOBJ); int rc = RTR0MemObjAllocCont(&g_hMemObjIOBitmap, 3 << PAGE_SHIFT, false /* fExecutable */); if (RT_FAILURE(rc)) return rc; g_pvIOBitmap = RTR0MemObjAddress(g_hMemObjIOBitmap); g_HCPhysIOBitmap = RTR0MemObjGetPagePhysAddr(g_hMemObjIOBitmap, 0 /* iPage */); /* Set all bits to intercept all IO accesses. */ ASMMemFill32(g_pvIOBitmap, 3 << PAGE_SHIFT, UINT32_C(0xffffffff)); return VINF_SUCCESS; } /** * Does global AMD-V termination (called during module termination). */ VMMR0DECL(void) SVMR0GlobalTerm(void) { if (g_hMemObjIOBitmap != NIL_RTR0MEMOBJ) { RTR0MemObjFree(g_hMemObjIOBitmap, true /* fFreeMappings */); g_pvIOBitmap = NULL; g_HCPhysIOBitmap = 0; g_hMemObjIOBitmap = NIL_RTR0MEMOBJ; } } /** * Frees any allocated per-VCPU structures for a VM. * * @param pVM The cross context VM structure. */ DECLINLINE(void) hmR0SvmFreeStructs(PVM pVM) { for (uint32_t i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; AssertPtr(pVCpu); if (pVCpu->hm.s.svm.hMemObjVmcbHost != NIL_RTR0MEMOBJ) { RTR0MemObjFree(pVCpu->hm.s.svm.hMemObjVmcbHost, false); pVCpu->hm.s.svm.pvVmcbHost = 0; pVCpu->hm.s.svm.HCPhysVmcbHost = 0; pVCpu->hm.s.svm.hMemObjVmcbHost = NIL_RTR0MEMOBJ; } if (pVCpu->hm.s.svm.hMemObjVmcb != NIL_RTR0MEMOBJ) { RTR0MemObjFree(pVCpu->hm.s.svm.hMemObjVmcb, false); pVCpu->hm.s.svm.pvVmcb = 0; pVCpu->hm.s.svm.HCPhysVmcb = 0; pVCpu->hm.s.svm.hMemObjVmcb = NIL_RTR0MEMOBJ; } if (pVCpu->hm.s.svm.hMemObjMsrBitmap != NIL_RTR0MEMOBJ) { RTR0MemObjFree(pVCpu->hm.s.svm.hMemObjMsrBitmap, false); pVCpu->hm.s.svm.pvMsrBitmap = 0; pVCpu->hm.s.svm.HCPhysMsrBitmap = 0; pVCpu->hm.s.svm.hMemObjMsrBitmap = NIL_RTR0MEMOBJ; } } } /** * Does per-VM AMD-V initialization. * * @returns VBox status code. * @param pVM The cross context VM structure. */ VMMR0DECL(int) SVMR0InitVM(PVM pVM) { int rc = VERR_INTERNAL_ERROR_5; /* * Check for an AMD CPU erratum which requires us to flush the TLB before every world-switch. */ uint32_t u32Family; uint32_t u32Model; uint32_t u32Stepping; if (HMAmdIsSubjectToErratum170(&u32Family, &u32Model, &u32Stepping)) { Log4(("SVMR0InitVM: AMD cpu with erratum 170 family %#x model %#x stepping %#x\n", u32Family, u32Model, u32Stepping)); pVM->hm.s.svm.fAlwaysFlushTLB = true; } /* * Initialize the R0 memory objects up-front so we can properly cleanup on allocation failures. */ for (VMCPUID i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; pVCpu->hm.s.svm.hMemObjVmcbHost = NIL_RTR0MEMOBJ; pVCpu->hm.s.svm.hMemObjVmcb = NIL_RTR0MEMOBJ; pVCpu->hm.s.svm.hMemObjMsrBitmap = NIL_RTR0MEMOBJ; } for (VMCPUID i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; /* * Allocate one page for the host-context VM control block (VMCB). This is used for additional host-state (such as * FS, GS, Kernel GS Base, etc.) apart from the host-state save area specified in MSR_K8_VM_HSAVE_PA. */ rc = RTR0MemObjAllocCont(&pVCpu->hm.s.svm.hMemObjVmcbHost, 1 << PAGE_SHIFT, false /* fExecutable */); if (RT_FAILURE(rc)) goto failure_cleanup; pVCpu->hm.s.svm.pvVmcbHost = RTR0MemObjAddress(pVCpu->hm.s.svm.hMemObjVmcbHost); pVCpu->hm.s.svm.HCPhysVmcbHost = RTR0MemObjGetPagePhysAddr(pVCpu->hm.s.svm.hMemObjVmcbHost, 0 /* iPage */); Assert(pVCpu->hm.s.svm.HCPhysVmcbHost < _4G); ASMMemZeroPage(pVCpu->hm.s.svm.pvVmcbHost); /* * Allocate one page for the guest-state VMCB. */ rc = RTR0MemObjAllocCont(&pVCpu->hm.s.svm.hMemObjVmcb, 1 << PAGE_SHIFT, false /* fExecutable */); if (RT_FAILURE(rc)) goto failure_cleanup; pVCpu->hm.s.svm.pvVmcb = RTR0MemObjAddress(pVCpu->hm.s.svm.hMemObjVmcb); pVCpu->hm.s.svm.HCPhysVmcb = RTR0MemObjGetPagePhysAddr(pVCpu->hm.s.svm.hMemObjVmcb, 0 /* iPage */); Assert(pVCpu->hm.s.svm.HCPhysVmcb < _4G); ASMMemZeroPage(pVCpu->hm.s.svm.pvVmcb); /* * Allocate two pages (8 KB) for the MSR permission bitmap. There doesn't seem to be a way to convince * SVM to not require one. */ rc = RTR0MemObjAllocCont(&pVCpu->hm.s.svm.hMemObjMsrBitmap, 2 << PAGE_SHIFT, false /* fExecutable */); if (RT_FAILURE(rc)) goto failure_cleanup; pVCpu->hm.s.svm.pvMsrBitmap = RTR0MemObjAddress(pVCpu->hm.s.svm.hMemObjMsrBitmap); pVCpu->hm.s.svm.HCPhysMsrBitmap = RTR0MemObjGetPagePhysAddr(pVCpu->hm.s.svm.hMemObjMsrBitmap, 0 /* iPage */); /* Set all bits to intercept all MSR accesses (changed later on). */ ASMMemFill32(pVCpu->hm.s.svm.pvMsrBitmap, 2 << PAGE_SHIFT, UINT32_C(0xffffffff)); } return VINF_SUCCESS; failure_cleanup: hmR0SvmFreeStructs(pVM); return rc; } /** * Does per-VM AMD-V termination. * * @returns VBox status code. * @param pVM The cross context VM structure. */ VMMR0DECL(int) SVMR0TermVM(PVM pVM) { hmR0SvmFreeStructs(pVM); return VINF_SUCCESS; } /** * Sets the permission bits for the specified MSR in the MSRPM. * * @param pVCpu The cross context virtual CPU structure. * @param uMsr The MSR for which the access permissions are being set. * @param enmRead MSR read permissions. * @param enmWrite MSR write permissions. */ static void hmR0SvmSetMsrPermission(PVMCPU pVCpu, unsigned uMsr, SVMMSREXITREAD enmRead, SVMMSREXITWRITE enmWrite) { unsigned uBit; uint8_t *pbMsrBitmap = (uint8_t *)pVCpu->hm.s.svm.pvMsrBitmap; /* * Layout: * Byte offset MSR range * 0x000 - 0x7ff 0x00000000 - 0x00001fff * 0x800 - 0xfff 0xc0000000 - 0xc0001fff * 0x1000 - 0x17ff 0xc0010000 - 0xc0011fff * 0x1800 - 0x1fff Reserved */ if (uMsr <= 0x00001FFF) { /* Pentium-compatible MSRs. */ uBit = uMsr * 2; } else if ( uMsr >= 0xC0000000 && uMsr <= 0xC0001FFF) { /* AMD Sixth Generation x86 Processor MSRs. */ uBit = (uMsr - 0xC0000000) * 2; pbMsrBitmap += 0x800; } else if ( uMsr >= 0xC0010000 && uMsr <= 0xC0011FFF) { /* AMD Seventh and Eighth Generation Processor MSRs. */ uBit = (uMsr - 0xC0001000) * 2; pbMsrBitmap += 0x1000; } else { AssertFailed(); return; } Assert(uBit < 0x3fff /* 16 * 1024 - 1 */); if (enmRead == SVMMSREXIT_INTERCEPT_READ) ASMBitSet(pbMsrBitmap, uBit); else ASMBitClear(pbMsrBitmap, uBit); if (enmWrite == SVMMSREXIT_INTERCEPT_WRITE) ASMBitSet(pbMsrBitmap, uBit + 1); else ASMBitClear(pbMsrBitmap, uBit + 1); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_IOPM_MSRPM; } /** * Sets up AMD-V for the specified VM. * This function is only called once per-VM during initalization. * * @returns VBox status code. * @param pVM The cross context VM structure. */ VMMR0DECL(int) SVMR0SetupVM(PVM pVM) { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); AssertReturn(pVM, VERR_INVALID_PARAMETER); Assert(pVM->hm.s.svm.fSupported); bool const fPauseFilter = RT_BOOL(pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_PAUSE_FILTER); bool const fPauseFilterThreshold = RT_BOOL(pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_PAUSE_FILTER_THRESHOLD); bool const fUsePauseFilter = fPauseFilter && pVM->hm.s.svm.cPauseFilter && pVM->hm.s.svm.cPauseFilterThresholdTicks; for (VMCPUID i = 0; i < pVM->cCpus; i++) { PVMCPU pVCpu = &pVM->aCpus[i]; PSVMVMCB pVmcb = (PSVMVMCB)pVM->aCpus[i].hm.s.svm.pvVmcb; AssertMsgReturn(pVmcb, ("Invalid pVmcb for vcpu[%u]\n", i), VERR_SVM_INVALID_PVMCB); /* Initialize the #VMEXIT history array with end-of-array markers (UINT16_MAX). */ Assert(!pVCpu->hm.s.idxExitHistoryFree); HMCPU_EXIT_HISTORY_RESET(pVCpu); /* Always trap #AC for reasons of security. */ pVmcb->ctrl.u32InterceptException |= RT_BIT_32(X86_XCPT_AC); /* Always trap #DB for reasons of security. */ pVmcb->ctrl.u32InterceptException |= RT_BIT_32(X86_XCPT_DB); /* Trap exceptions unconditionally (debug purposes). */ #ifdef HMSVM_ALWAYS_TRAP_PF pVmcb->ctrl.u32InterceptException |= RT_BIT(X86_XCPT_PF); #endif #ifdef HMSVM_ALWAYS_TRAP_ALL_XCPTS /* If you add any exceptions here, make sure to update hmR0SvmHandleExit(). */ pVmcb->ctrl.u32InterceptException |= 0 | RT_BIT(X86_XCPT_BP) | RT_BIT(X86_XCPT_DE) | RT_BIT(X86_XCPT_NM) | RT_BIT(X86_XCPT_UD) | RT_BIT(X86_XCPT_NP) | RT_BIT(X86_XCPT_SS) | RT_BIT(X86_XCPT_GP) | RT_BIT(X86_XCPT_PF) | RT_BIT(X86_XCPT_MF) ; #endif /* Set up unconditional intercepts and conditions. */ pVmcb->ctrl.u32InterceptCtrl1 = SVM_CTRL1_INTERCEPT_INTR /* External interrupt causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_NMI /* Non-maskable interrupts causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_INIT /* INIT signal causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_RDPMC /* RDPMC causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_CPUID /* CPUID causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_RSM /* RSM causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_HLT /* HLT causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_INOUT_BITMAP /* Use the IOPM to cause IOIO #VMEXITs. */ | SVM_CTRL1_INTERCEPT_MSR_SHADOW /* MSR access not covered by MSRPM causes a #VMEXIT.*/ | SVM_CTRL1_INTERCEPT_INVLPGA /* INVLPGA causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_SHUTDOWN /* Shutdown events causes a #VMEXIT. */ | SVM_CTRL1_INTERCEPT_FERR_FREEZE; /* Intercept "freezing" during legacy FPU handling. */ pVmcb->ctrl.u32InterceptCtrl2 = SVM_CTRL2_INTERCEPT_VMRUN /* VMRUN causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_VMMCALL /* VMMCALL causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_VMLOAD /* VMLOAD causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_VMSAVE /* VMSAVE causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_STGI /* STGI causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_CLGI /* CLGI causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_SKINIT /* SKINIT causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_WBINVD /* WBINVD causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_MONITOR /* MONITOR causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_MWAIT /* MWAIT causes a #VMEXIT. */ | SVM_CTRL2_INTERCEPT_XSETBV; /* XSETBV causes a #VMEXIT. */ /* CR0, CR4 reads must be intercepted, our shadow values are not necessarily the same as the guest's. */ pVmcb->ctrl.u16InterceptRdCRx = RT_BIT(0) | RT_BIT(4); /* CR0, CR4 writes must be intercepted for the same reasons as above. */ pVmcb->ctrl.u16InterceptWrCRx = RT_BIT(0) | RT_BIT(4); /* Intercept all DRx reads and writes by default. Changed later on. */ pVmcb->ctrl.u16InterceptRdDRx = 0xffff; pVmcb->ctrl.u16InterceptWrDRx = 0xffff; /* Virtualize masking of INTR interrupts. (reads/writes from/to CR8 go to the V_TPR register) */ pVmcb->ctrl.IntCtrl.n.u1VIrqMasking = 1; /* Ignore the priority in the TPR. This is necessary for delivering PIC style (ExtInt) interrupts and we currently deliver both PIC and APIC interrupts alike. See hmR0SvmInjectPendingEvent() */ pVmcb->ctrl.IntCtrl.n.u1IgnoreTPR = 1; /* Set IO and MSR bitmap permission bitmap physical addresses. */ pVmcb->ctrl.u64IOPMPhysAddr = g_HCPhysIOBitmap; pVmcb->ctrl.u64MSRPMPhysAddr = pVCpu->hm.s.svm.HCPhysMsrBitmap; /* No LBR virtualization. */ pVmcb->ctrl.u64LBRVirt = 0; /* Initially set all VMCB clean bits to 0 indicating that everything should be loaded from the VMCB in memory. */ pVmcb->ctrl.u64VmcbCleanBits = 0; /* The host ASID MBZ, for the guest start with 1. */ pVmcb->ctrl.TLBCtrl.n.u32ASID = 1; /* * Setup the PAT MSR (applicable for Nested Paging only). * The default value should be 0x0007040600070406ULL, but we want to treat all guest memory as WB, * so choose type 6 for all PAT slots. */ pVmcb->guest.u64GPAT = UINT64_C(0x0006060606060606); /* Setup Nested Paging. This doesn't change throughout the execution time of the VM. */ pVmcb->ctrl.NestedPaging.n.u1NestedPaging = pVM->hm.s.fNestedPaging; /* Without Nested Paging, we need additionally intercepts. */ if (!pVM->hm.s.fNestedPaging) { /* CR3 reads/writes must be intercepted; our shadow values differ from the guest values. */ pVmcb->ctrl.u16InterceptRdCRx |= RT_BIT(3); pVmcb->ctrl.u16InterceptWrCRx |= RT_BIT(3); /* Intercept INVLPG and task switches (may change CR3, EFLAGS, LDT). */ pVmcb->ctrl.u32InterceptCtrl1 |= SVM_CTRL1_INTERCEPT_INVLPG | SVM_CTRL1_INTERCEPT_TASK_SWITCH; /* Page faults must be intercepted to implement shadow paging. */ pVmcb->ctrl.u32InterceptException |= RT_BIT(X86_XCPT_PF); } #ifdef HMSVM_ALWAYS_TRAP_TASK_SWITCH pVmcb->ctrl.u32InterceptCtrl1 |= SVM_CTRL1_INTERCEPT_TASK_SWITCH; #endif /* Apply the exceptions intercepts needed by the GIM provider. */ if (pVCpu->hm.s.fGIMTrapXcptUD) pVmcb->ctrl.u32InterceptException |= RT_BIT(X86_XCPT_UD); /* Setup Pause Filter for guest pause-loop (spinlock) exiting. */ if (fUsePauseFilter) { pVmcb->ctrl.u16PauseFilterCount = pVM->hm.s.svm.cPauseFilter; if (fPauseFilterThreshold) pVmcb->ctrl.u16PauseFilterThreshold = pVM->hm.s.svm.cPauseFilterThresholdTicks; } /* * The following MSRs are saved/restored automatically during the world-switch. * Don't intercept guest read/write accesses to these MSRs. */ hmR0SvmSetMsrPermission(pVCpu, MSR_K8_LSTAR, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K8_CSTAR, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K6_STAR, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K8_SF_MASK, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K8_FS_BASE, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K8_GS_BASE, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_K8_KERNEL_GS_BASE, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_IA32_SYSENTER_CS, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_IA32_SYSENTER_ESP, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); hmR0SvmSetMsrPermission(pVCpu, MSR_IA32_SYSENTER_EIP, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); } return VINF_SUCCESS; } /** * Invalidates a guest page by guest virtual address. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param GCVirt Guest virtual address of the page to invalidate. */ VMMR0DECL(int) SVMR0InvalidatePage(PVM pVM, PVMCPU pVCpu, RTGCPTR GCVirt) { AssertReturn(pVM, VERR_INVALID_PARAMETER); Assert(pVM->hm.s.svm.fSupported); bool fFlushPending = pVM->hm.s.svm.fAlwaysFlushTLB || VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_TLB_FLUSH); /* Skip it if a TLB flush is already pending. */ if (!fFlushPending) { Log4(("SVMR0InvalidatePage %RGv\n", GCVirt)); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; AssertMsgReturn(pVmcb, ("Invalid pVmcb!\n"), VERR_SVM_INVALID_PVMCB); #if HC_ARCH_BITS == 32 /* If we get a flush in 64-bit guest mode, then force a full TLB flush. INVLPGA takes only 32-bit addresses. */ if (CPUMIsGuestInLongMode(pVCpu)) VMCPU_FF_SET(pVCpu, VMCPU_FF_TLB_FLUSH); else #endif { SVMR0InvlpgA(GCVirt, pVmcb->ctrl.TLBCtrl.n.u32ASID); STAM_COUNTER_INC(&pVCpu->hm.s.StatFlushTlbInvlpgVirt); } } return VINF_SUCCESS; } /** * Flushes the appropriate tagged-TLB entries. * * @param pVCpu The cross context virtual CPU structure. */ static void hmR0SvmFlushTaggedTlb(PVMCPU pVCpu) { PVM pVM = pVCpu->CTX_SUFF(pVM); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; PHMGLOBALCPUINFO pCpu = HMR0GetCurrentCpu(); /* * Force a TLB flush for the first world switch if the current CPU differs from the one we ran on last. * This can happen both for start & resume due to long jumps back to ring-3. * If the TLB flush count changed, another VM (VCPU rather) has hit the ASID limit while flushing the TLB, * so we cannot reuse the ASIDs without flushing. */ bool fNewAsid = false; Assert(pCpu->idCpu != NIL_RTCPUID); if ( pVCpu->hm.s.idLastCpu != pCpu->idCpu || pVCpu->hm.s.cTlbFlushes != pCpu->cTlbFlushes) { STAM_COUNTER_INC(&pVCpu->hm.s.StatFlushTlbWorldSwitch); pVCpu->hm.s.fForceTLBFlush = true; fNewAsid = true; } /* Set TLB flush state as checked until we return from the world switch. */ ASMAtomicWriteBool(&pVCpu->hm.s.fCheckedTLBFlush, true); /* Check for explicit TLB flushes. */ if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_TLB_FLUSH)) { pVCpu->hm.s.fForceTLBFlush = true; STAM_COUNTER_INC(&pVCpu->hm.s.StatFlushTlb); } pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_NOTHING; if (pVM->hm.s.svm.fAlwaysFlushTLB) { /* * This is the AMD erratum 170. We need to flush the entire TLB for each world switch. Sad. */ pCpu->uCurrentAsid = 1; pVCpu->hm.s.uCurrentAsid = 1; pVCpu->hm.s.cTlbFlushes = pCpu->cTlbFlushes; pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_ENTIRE; /* Clear the VMCB Clean Bit for NP while flushing the TLB. See @bugref{7152}. */ pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_NP; /* Keep track of last CPU ID even when flushing all the time. */ if (fNewAsid) pVCpu->hm.s.idLastCpu = pCpu->idCpu; } else if (pVCpu->hm.s.fForceTLBFlush) { /* Clear the VMCB Clean Bit for NP while flushing the TLB. See @bugref{7152}. */ pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_NP; if (fNewAsid) { ++pCpu->uCurrentAsid; bool fHitASIDLimit = false; if (pCpu->uCurrentAsid >= pVM->hm.s.uMaxAsid) { pCpu->uCurrentAsid = 1; /* Wraparound at 1; host uses 0 */ pCpu->cTlbFlushes++; /* All VCPUs that run on this host CPU must use a new VPID. */ fHitASIDLimit = true; if (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_FLUSH_BY_ASID) { pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_SINGLE_CONTEXT; pCpu->fFlushAsidBeforeUse = true; } else { pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_ENTIRE; pCpu->fFlushAsidBeforeUse = false; } } if ( !fHitASIDLimit && pCpu->fFlushAsidBeforeUse) { if (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_FLUSH_BY_ASID) pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_SINGLE_CONTEXT; else { pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_ENTIRE; pCpu->fFlushAsidBeforeUse = false; } } pVCpu->hm.s.uCurrentAsid = pCpu->uCurrentAsid; pVCpu->hm.s.idLastCpu = pCpu->idCpu; pVCpu->hm.s.cTlbFlushes = pCpu->cTlbFlushes; } else { if (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_FLUSH_BY_ASID) pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_SINGLE_CONTEXT; else pVmcb->ctrl.TLBCtrl.n.u8TLBFlush = SVM_TLB_FLUSH_ENTIRE; } pVCpu->hm.s.fForceTLBFlush = false; } /* Update VMCB with the ASID. */ if (pVmcb->ctrl.TLBCtrl.n.u32ASID != pVCpu->hm.s.uCurrentAsid) { pVmcb->ctrl.TLBCtrl.n.u32ASID = pVCpu->hm.s.uCurrentAsid; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_ASID; } AssertMsg(pVCpu->hm.s.idLastCpu == pCpu->idCpu, ("vcpu idLastCpu=%u pcpu idCpu=%u\n", pVCpu->hm.s.idLastCpu, pCpu->idCpu)); AssertMsg(pVCpu->hm.s.cTlbFlushes == pCpu->cTlbFlushes, ("Flush count mismatch for cpu %u (%u vs %u)\n", pCpu->idCpu, pVCpu->hm.s.cTlbFlushes, pCpu->cTlbFlushes)); AssertMsg(pCpu->uCurrentAsid >= 1 && pCpu->uCurrentAsid < pVM->hm.s.uMaxAsid, ("cpu%d uCurrentAsid = %x\n", pCpu->idCpu, pCpu->uCurrentAsid)); AssertMsg(pVCpu->hm.s.uCurrentAsid >= 1 && pVCpu->hm.s.uCurrentAsid < pVM->hm.s.uMaxAsid, ("cpu%d VM uCurrentAsid = %x\n", pCpu->idCpu, pVCpu->hm.s.uCurrentAsid)); #ifdef VBOX_WITH_STATISTICS if (pVmcb->ctrl.TLBCtrl.n.u8TLBFlush == SVM_TLB_FLUSH_NOTHING) STAM_COUNTER_INC(&pVCpu->hm.s.StatNoFlushTlbWorldSwitch); else if ( pVmcb->ctrl.TLBCtrl.n.u8TLBFlush == SVM_TLB_FLUSH_SINGLE_CONTEXT || pVmcb->ctrl.TLBCtrl.n.u8TLBFlush == SVM_TLB_FLUSH_SINGLE_CONTEXT_RETAIN_GLOBALS) { STAM_COUNTER_INC(&pVCpu->hm.s.StatFlushAsid); } else { Assert(pVmcb->ctrl.TLBCtrl.n.u8TLBFlush == SVM_TLB_FLUSH_ENTIRE); STAM_COUNTER_INC(&pVCpu->hm.s.StatFlushEntire); } #endif } /** @name 64-bit guest on 32-bit host OS helper functions. * * The host CPU is still 64-bit capable but the host OS is running in 32-bit * mode (code segment, paging). These wrappers/helpers perform the necessary * bits for the 32->64 switcher. * * @{ */ #if HC_ARCH_BITS == 32 && defined(VBOX_ENABLE_64_BITS_GUESTS) /** * Prepares for and executes VMRUN (64-bit guests on a 32-bit host). * * @returns VBox status code. * @param HCPhysVmcbHost Physical address of host VMCB. * @param HCPhysVmcb Physical address of the VMCB. * @param pCtx Pointer to the guest-CPU context. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. */ DECLASM(int) SVMR0VMSwitcherRun64(RTHCPHYS HCPhysVmcbHost, RTHCPHYS HCPhysVmcb, PCPUMCTX pCtx, PVM pVM, PVMCPU pVCpu) { uint32_t aParam[8]; aParam[0] = (uint32_t)(HCPhysVmcbHost); /* Param 1: HCPhysVmcbHost - Lo. */ aParam[1] = (uint32_t)(HCPhysVmcbHost >> 32); /* Param 1: HCPhysVmcbHost - Hi. */ aParam[2] = (uint32_t)(HCPhysVmcb); /* Param 2: HCPhysVmcb - Lo. */ aParam[3] = (uint32_t)(HCPhysVmcb >> 32); /* Param 2: HCPhysVmcb - Hi. */ aParam[4] = VM_RC_ADDR(pVM, pVM); aParam[5] = 0; aParam[6] = VM_RC_ADDR(pVM, pVCpu); aParam[7] = 0; return SVMR0Execute64BitsHandler(pVM, pVCpu, pCtx, HM64ON32OP_SVMRCVMRun64, RT_ELEMENTS(aParam), &aParam[0]); } /** * Executes the specified VMRUN handler in 64-bit mode. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param enmOp The operation to perform. * @param cParams Number of parameters. * @param paParam Array of 32-bit parameters. */ VMMR0DECL(int) SVMR0Execute64BitsHandler(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx, HM64ON32OP enmOp, uint32_t cParams, uint32_t *paParam) { AssertReturn(pVM->hm.s.pfnHost32ToGuest64R0, VERR_HM_NO_32_TO_64_SWITCHER); Assert(enmOp > HM64ON32OP_INVALID && enmOp < HM64ON32OP_END); NOREF(pCtx); /* Disable interrupts. */ RTHCUINTREG uOldEFlags = ASMIntDisableFlags(); #ifdef VBOX_WITH_VMMR0_DISABLE_LAPIC_NMI RTCPUID idHostCpu = RTMpCpuId(); CPUMR0SetLApic(pVCpu, idHostCpu); #endif CPUMSetHyperESP(pVCpu, VMMGetStackRC(pVCpu)); CPUMSetHyperEIP(pVCpu, enmOp); for (int i = (int)cParams - 1; i >= 0; i--) CPUMPushHyper(pVCpu, paParam[i]); STAM_PROFILE_ADV_START(&pVCpu->hm.s.StatWorldSwitch3264, z); /* Call the switcher. */ int rc = pVM->hm.s.pfnHost32ToGuest64R0(pVM, RT_OFFSETOF(VM, aCpus[pVCpu->idCpu].cpum) - RT_OFFSETOF(VM, cpum)); STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatWorldSwitch3264, z); /* Restore interrupts. */ ASMSetFlags(uOldEFlags); return rc; } #endif /* HC_ARCH_BITS == 32 && defined(VBOX_ENABLE_64_BITS_GUESTS) */ /** @} */ /** * Adds an exception to the intercept exception bitmap in the VMCB and updates * the corresponding VMCB Clean bit. * * @param pVmcb Pointer to the VM control block. * @param u32Xcpt The value of the exception (X86_XCPT_*). */ DECLINLINE(void) hmR0SvmAddXcptIntercept(PSVMVMCB pVmcb, uint32_t u32Xcpt) { if (!(pVmcb->ctrl.u32InterceptException & RT_BIT(u32Xcpt))) { pVmcb->ctrl.u32InterceptException |= RT_BIT(u32Xcpt); pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; } } /** * Removes an exception from the intercept-exception bitmap in the VMCB and * updates the corresponding VMCB Clean bit. * * @param pVmcb Pointer to the VM control block. * @param u32Xcpt The value of the exception (X86_XCPT_*). */ DECLINLINE(void) hmR0SvmRemoveXcptIntercept(PSVMVMCB pVmcb, uint32_t u32Xcpt) { Assert(u32Xcpt != X86_XCPT_DB); Assert(u32Xcpt != X86_XCPT_AC); #ifndef HMSVM_ALWAYS_TRAP_ALL_XCPTS if (pVmcb->ctrl.u32InterceptException & RT_BIT(u32Xcpt)) { pVmcb->ctrl.u32InterceptException &= ~RT_BIT(u32Xcpt); pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; } #endif } /** * Loads the guest CR0 control register into the guest-state area in the VMCB. * Although the guest CR0 is a separate field in the VMCB we have to consider * the FPU state itself which is shared between the host and the guest. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static void hmR0SvmLoadSharedCR0(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { /* * Guest CR0. */ PVM pVM = pVCpu->CTX_SUFF(pVM); if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR0)) { uint64_t u64GuestCR0 = pCtx->cr0; /* Always enable caching. */ u64GuestCR0 &= ~(X86_CR0_CD | X86_CR0_NW); /* * When Nested Paging is not available use shadow page tables and intercept #PFs (the latter done in SVMR0SetupVM()). */ if (!pVM->hm.s.fNestedPaging) { u64GuestCR0 |= X86_CR0_PG; /* When Nested Paging is not available, use shadow page tables. */ u64GuestCR0 |= X86_CR0_WP; /* Guest CPL 0 writes to its read-only pages should cause a #PF #VMEXIT. */ } /* * Guest FPU bits. */ bool fInterceptNM = false; bool fInterceptMF = false; u64GuestCR0 |= X86_CR0_NE; /* Use internal x87 FPU exceptions handling rather than external interrupts. */ if (CPUMIsGuestFPUStateActive(pVCpu)) { /* Catch floating point exceptions if we need to report them to the guest in a different way. */ if (!(pCtx->cr0 & X86_CR0_NE)) { Log4(("hmR0SvmLoadGuestControlRegs: Intercepting Guest CR0.MP Old-style FPU handling!!!\n")); fInterceptMF = true; } } else { fInterceptNM = true; /* Guest FPU inactive, #VMEXIT on #NM for lazy FPU loading. */ u64GuestCR0 |= X86_CR0_TS /* Guest can task switch quickly and do lazy FPU syncing. */ | X86_CR0_MP; /* FWAIT/WAIT should not ignore CR0.TS and should generate #NM. */ } /* * Update the exception intercept bitmap. */ if (fInterceptNM) hmR0SvmAddXcptIntercept(pVmcb, X86_XCPT_NM); else hmR0SvmRemoveXcptIntercept(pVmcb, X86_XCPT_NM); if (fInterceptMF) hmR0SvmAddXcptIntercept(pVmcb, X86_XCPT_MF); else hmR0SvmRemoveXcptIntercept(pVmcb, X86_XCPT_MF); pVmcb->guest.u64CR0 = u64GuestCR0; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CRX_EFER; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_CR0); } } /** * Loads the guest control registers (CR2, CR3, CR4) into the VMCB. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static int hmR0SvmLoadGuestControlRegs(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { PVM pVM = pVCpu->CTX_SUFF(pVM); /* * Guest CR2. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR2)) { pVmcb->guest.u64CR2 = pCtx->cr2; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CR2; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_CR2); } /* * Guest CR3. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR3)) { if (pVM->hm.s.fNestedPaging) { PGMMODE enmShwPagingMode; #if HC_ARCH_BITS == 32 if (CPUMIsGuestInLongModeEx(pCtx)) enmShwPagingMode = PGMMODE_AMD64_NX; else #endif enmShwPagingMode = PGMGetHostMode(pVM); pVmcb->ctrl.u64NestedPagingCR3 = PGMGetNestedCR3(pVCpu, enmShwPagingMode); pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_NP; Assert(pVmcb->ctrl.u64NestedPagingCR3); pVmcb->guest.u64CR3 = pCtx->cr3; } else pVmcb->guest.u64CR3 = PGMGetHyperCR3(pVCpu); pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CRX_EFER; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_CR3); } /* * Guest CR4. * ASSUMES this is done everytime we get in from ring-3! (XCR0) */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR4)) { uint64_t u64GuestCR4 = pCtx->cr4; if (!pVM->hm.s.fNestedPaging) { switch (pVCpu->hm.s.enmShadowMode) { case PGMMODE_REAL: case PGMMODE_PROTECTED: /* Protected mode, no paging. */ AssertFailed(); return VERR_PGM_UNSUPPORTED_SHADOW_PAGING_MODE; case PGMMODE_32_BIT: /* 32-bit paging. */ u64GuestCR4 &= ~X86_CR4_PAE; break; case PGMMODE_PAE: /* PAE paging. */ case PGMMODE_PAE_NX: /* PAE paging with NX enabled. */ /** Must use PAE paging as we could use physical memory > 4 GB */ u64GuestCR4 |= X86_CR4_PAE; break; case PGMMODE_AMD64: /* 64-bit AMD paging (long mode). */ case PGMMODE_AMD64_NX: /* 64-bit AMD paging (long mode) with NX enabled. */ #ifdef VBOX_ENABLE_64_BITS_GUESTS break; #else AssertFailed(); return VERR_PGM_UNSUPPORTED_SHADOW_PAGING_MODE; #endif default: /* shut up gcc */ AssertFailed(); return VERR_PGM_UNSUPPORTED_SHADOW_PAGING_MODE; } } pVmcb->guest.u64CR4 = u64GuestCR4; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CRX_EFER; /* Whether to save/load/restore XCR0 during world switch depends on CR4.OSXSAVE and host+guest XCR0. */ pVCpu->hm.s.fLoadSaveGuestXcr0 = (u64GuestCR4 & X86_CR4_OSXSAVE) && pCtx->aXcr[0] != ASMGetXcr0(); HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_CR4); } return VINF_SUCCESS; } /** * Loads the guest segment registers into the VMCB. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static void hmR0SvmLoadGuestSegmentRegs(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { /* Guest Segment registers: CS, SS, DS, ES, FS, GS. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_SEGMENT_REGS)) { HMSVM_LOAD_SEG_REG(CS, cs); HMSVM_LOAD_SEG_REG(SS, ss); HMSVM_LOAD_SEG_REG(DS, ds); HMSVM_LOAD_SEG_REG(ES, es); HMSVM_LOAD_SEG_REG(FS, fs); HMSVM_LOAD_SEG_REG(GS, gs); pVmcb->guest.u8CPL = pCtx->ss.Attr.n.u2Dpl; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_SEG; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_SEGMENT_REGS); } /* Guest TR. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_TR)) { HMSVM_LOAD_SEG_REG(TR, tr); HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_TR); } /* Guest LDTR. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_LDTR)) { HMSVM_LOAD_SEG_REG(LDTR, ldtr); HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_LDTR); } /* Guest GDTR. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_GDTR)) { pVmcb->guest.GDTR.u32Limit = pCtx->gdtr.cbGdt; pVmcb->guest.GDTR.u64Base = pCtx->gdtr.pGdt; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DT; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_GDTR); } /* Guest IDTR. */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_IDTR)) { pVmcb->guest.IDTR.u32Limit = pCtx->idtr.cbIdt; pVmcb->guest.IDTR.u64Base = pCtx->idtr.pIdt; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DT; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_IDTR); } } /** * Loads the guest MSRs into the VMCB. * * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static void hmR0SvmLoadGuestMsrs(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { /* Guest Sysenter MSRs. */ pVmcb->guest.u64SysEnterCS = pCtx->SysEnter.cs; pVmcb->guest.u64SysEnterEIP = pCtx->SysEnter.eip; pVmcb->guest.u64SysEnterESP = pCtx->SysEnter.esp; /* * Guest EFER MSR. * AMD-V requires guest EFER.SVME to be set. Weird. * See AMD spec. 15.5.1 "Basic Operation" | "Canonicalization and Consistency Checks". */ if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_EFER_MSR)) { pVmcb->guest.u64EFER = pCtx->msrEFER | MSR_K6_EFER_SVME; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CRX_EFER; HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_EFER_MSR); } /* 64-bit MSRs. */ if (CPUMIsGuestInLongModeEx(pCtx)) { pVmcb->guest.FS.u64Base = pCtx->fs.u64Base; pVmcb->guest.GS.u64Base = pCtx->gs.u64Base; } else { /* If the guest isn't in 64-bit mode, clear MSR_K6_LME bit from guest EFER otherwise AMD-V expects amd64 shadow paging. */ if (pCtx->msrEFER & MSR_K6_EFER_LME) { pVmcb->guest.u64EFER &= ~MSR_K6_EFER_LME; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_CRX_EFER; } } /** @todo The following are used in 64-bit only (SYSCALL/SYSRET) but they might * be writable in 32-bit mode. Clarify with AMD spec. */ pVmcb->guest.u64STAR = pCtx->msrSTAR; pVmcb->guest.u64LSTAR = pCtx->msrLSTAR; pVmcb->guest.u64CSTAR = pCtx->msrCSTAR; pVmcb->guest.u64SFMASK = pCtx->msrSFMASK; pVmcb->guest.u64KernelGSBase = pCtx->msrKERNELGSBASE; } /** * Loads the guest state into the VMCB and programs the necessary intercepts * accordingly. * * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! * @remarks Requires EFLAGS to be up-to-date in the VMCB! */ static void hmR0SvmLoadSharedDebugState(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { if (!HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_DEBUG)) return; Assert((pCtx->dr[6] & X86_DR6_RA1_MASK) == X86_DR6_RA1_MASK); Assert((pCtx->dr[6] & X86_DR6_RAZ_MASK) == 0); Assert((pCtx->dr[7] & X86_DR7_RA1_MASK) == X86_DR7_RA1_MASK); Assert((pCtx->dr[7] & X86_DR7_RAZ_MASK) == 0); bool fInterceptMovDRx = false; /* * Anyone single stepping on the host side? If so, we'll have to use the * trap flag in the guest EFLAGS since AMD-V doesn't have a trap flag on * the VMM level like the VT-x implementations does. */ bool const fStepping = pVCpu->hm.s.fSingleInstruction; if (fStepping) { pVCpu->hm.s.fClearTrapFlag = true; pVmcb->guest.u64RFlags |= X86_EFL_TF; fInterceptMovDRx = true; /* Need clean DR6, no guest mess. */ } else Assert(!DBGFIsStepping(pVCpu)); if ( fStepping || (CPUMGetHyperDR7(pVCpu) & X86_DR7_ENABLED_MASK)) { /* * Use the combined guest and host DRx values found in the hypervisor * register set because the debugger has breakpoints active or someone * is single stepping on the host side. * * Note! DBGF expects a clean DR6 state before executing guest code. */ #if HC_ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS) if ( CPUMIsGuestInLongModeEx(pCtx) && !CPUMIsHyperDebugStateActivePending(pVCpu)) { CPUMR0LoadHyperDebugState(pVCpu, false /* include DR6 */); Assert(!CPUMIsGuestDebugStateActivePending(pVCpu)); Assert(CPUMIsHyperDebugStateActivePending(pVCpu)); } else #endif if (!CPUMIsHyperDebugStateActive(pVCpu)) { CPUMR0LoadHyperDebugState(pVCpu, false /* include DR6 */); Assert(!CPUMIsGuestDebugStateActive(pVCpu)); Assert(CPUMIsHyperDebugStateActive(pVCpu)); } /* Update DR6 & DR7. (The other DRx values are handled by CPUM one way or the other.) */ if ( pVmcb->guest.u64DR6 != X86_DR6_INIT_VAL || pVmcb->guest.u64DR7 != CPUMGetHyperDR7(pVCpu)) { pVmcb->guest.u64DR7 = CPUMGetHyperDR7(pVCpu); pVmcb->guest.u64DR6 = X86_DR6_INIT_VAL; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DRX; pVCpu->hm.s.fUsingHyperDR7 = true; } /** @todo If we cared, we could optimize to allow the guest to read registers * with the same values. */ fInterceptMovDRx = true; Log5(("hmR0SvmLoadSharedDebugState: Loaded hyper DRx\n")); } else { /* * Update DR6, DR7 with the guest values if necessary. */ if ( pVmcb->guest.u64DR7 != pCtx->dr[7] || pVmcb->guest.u64DR6 != pCtx->dr[6]) { pVmcb->guest.u64DR7 = pCtx->dr[7]; pVmcb->guest.u64DR6 = pCtx->dr[6]; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DRX; pVCpu->hm.s.fUsingHyperDR7 = false; } /* * If the guest has enabled debug registers, we need to load them prior to * executing guest code so they'll trigger at the right time. */ if (pCtx->dr[7] & (X86_DR7_ENABLED_MASK | X86_DR7_GD)) /** @todo Why GD? */ { #if HC_ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS) if ( CPUMIsGuestInLongModeEx(pCtx) && !CPUMIsGuestDebugStateActivePending(pVCpu)) { CPUMR0LoadGuestDebugState(pVCpu, false /* include DR6 */); STAM_COUNTER_INC(&pVCpu->hm.s.StatDRxArmed); Assert(!CPUMIsHyperDebugStateActivePending(pVCpu)); Assert(CPUMIsGuestDebugStateActivePending(pVCpu)); } else #endif if (!CPUMIsGuestDebugStateActive(pVCpu)) { CPUMR0LoadGuestDebugState(pVCpu, false /* include DR6 */); STAM_COUNTER_INC(&pVCpu->hm.s.StatDRxArmed); Assert(!CPUMIsHyperDebugStateActive(pVCpu)); Assert(CPUMIsGuestDebugStateActive(pVCpu)); } Log5(("hmR0SvmLoadSharedDebugState: Loaded guest DRx\n")); } /* * If no debugging enabled, we'll lazy load DR0-3. We don't need to * intercept #DB as DR6 is updated in the VMCB. * * Note! If we cared and dared, we could skip intercepting \#DB here. * However, \#DB shouldn't be performance critical, so we'll play safe * and keep the code similar to the VT-x code and always intercept it. */ #if HC_ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS) else if ( !CPUMIsGuestDebugStateActivePending(pVCpu) && !CPUMIsGuestDebugStateActive(pVCpu)) #else else if (!CPUMIsGuestDebugStateActive(pVCpu)) #endif { fInterceptMovDRx = true; } } Assert(pVmcb->ctrl.u32InterceptException & RT_BIT_32(X86_XCPT_DB)); if (fInterceptMovDRx) { if ( pVmcb->ctrl.u16InterceptRdDRx != 0xffff || pVmcb->ctrl.u16InterceptWrDRx != 0xffff) { pVmcb->ctrl.u16InterceptRdDRx = 0xffff; pVmcb->ctrl.u16InterceptWrDRx = 0xffff; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; } } else { if ( pVmcb->ctrl.u16InterceptRdDRx || pVmcb->ctrl.u16InterceptWrDRx) { pVmcb->ctrl.u16InterceptRdDRx = 0; pVmcb->ctrl.u16InterceptWrDRx = 0; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; } } HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_DEBUG); } /** * Loads the guest APIC state (currently just the TPR). * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmLoadGuestApicState(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { if (!HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE)) return VINF_SUCCESS; bool fPendingIntr; uint8_t u8Tpr; int rc = PDMApicGetTPR(pVCpu, &u8Tpr, &fPendingIntr, NULL /* pu8PendingIrq */); AssertRCReturn(rc, rc); /* Assume that we need to trap all TPR accesses and thus need not check on every #VMEXIT if we should update the TPR. */ Assert(pVmcb->ctrl.IntCtrl.n.u1VIrqMasking); pVCpu->hm.s.svm.fSyncVTpr = false; /* 32-bit guests uses LSTAR MSR for patching guest code which touches the TPR. */ if (pVCpu->CTX_SUFF(pVM)->hm.s.fTPRPatchingActive) { pCtx->msrLSTAR = u8Tpr; /* If there are interrupts pending, intercept LSTAR writes, otherwise don't intercept reads or writes. */ if (fPendingIntr) hmR0SvmSetMsrPermission(pVCpu, MSR_K8_LSTAR, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_INTERCEPT_WRITE); else { hmR0SvmSetMsrPermission(pVCpu, MSR_K8_LSTAR, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); pVCpu->hm.s.svm.fSyncVTpr = true; } } else { /* Bits 3-0 of the VTPR field correspond to bits 7-4 of the TPR (which is the Task-Priority Class). */ pVmcb->ctrl.IntCtrl.n.u8VTPR = (u8Tpr >> 4); /* If there are interrupts pending, intercept CR8 writes to evaluate ASAP if we can deliver the interrupt to the guest. */ if (fPendingIntr) pVmcb->ctrl.u16InterceptWrCRx |= RT_BIT(8); else { pVmcb->ctrl.u16InterceptWrCRx &= ~RT_BIT(8); pVCpu->hm.s.svm.fSyncVTpr = true; } pVmcb->ctrl.u64VmcbCleanBits &= ~(HMSVM_VMCB_CLEAN_INTERCEPTS | HMSVM_VMCB_CLEAN_TPR); } HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); return rc; } /** * Loads the exception interrupts required for guest execution in the VMCB. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmLoadGuestXcptIntercepts(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { int rc = VINF_SUCCESS; NOREF(pCtx); if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_XCPT_INTERCEPTS)) { /* The remaining intercepts are handled elsewhere, e.g. in hmR0SvmLoadSharedCR0(). */ if (pVCpu->hm.s.fGIMTrapXcptUD) hmR0SvmAddXcptIntercept(pVmcb, X86_XCPT_UD); else hmR0SvmRemoveXcptIntercept(pVmcb, X86_XCPT_UD); HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_XCPT_INTERCEPTS); } return rc; } /** * Sets up the appropriate function to run guest code. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static int hmR0SvmSetupVMRunHandler(PVMCPU pVCpu, PCPUMCTX pCtx) { if (CPUMIsGuestInLongModeEx(pCtx)) { #ifndef VBOX_ENABLE_64_BITS_GUESTS return VERR_PGM_UNSUPPORTED_SHADOW_PAGING_MODE; #endif Assert(pVCpu->CTX_SUFF(pVM)->hm.s.fAllow64BitGuests); /* Guaranteed by hmR3InitFinalizeR0(). */ #if HC_ARCH_BITS == 32 /* 32-bit host. We need to switch to 64-bit before running the 64-bit guest. */ pVCpu->hm.s.svm.pfnVMRun = SVMR0VMSwitcherRun64; #else /* 64-bit host or hybrid host. */ pVCpu->hm.s.svm.pfnVMRun = SVMR0VMRun64; #endif } else { /* Guest is not in long mode, use the 32-bit handler. */ pVCpu->hm.s.svm.pfnVMRun = SVMR0VMRun; } return VINF_SUCCESS; } /** * Enters the AMD-V session. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCpu Pointer to the CPU info struct. */ VMMR0DECL(int) SVMR0Enter(PVM pVM, PVMCPU pVCpu, PHMGLOBALCPUINFO pCpu) { AssertPtr(pVM); AssertPtr(pVCpu); Assert(pVM->hm.s.svm.fSupported); Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); NOREF(pVM); NOREF(pCpu); LogFlowFunc(("pVM=%p pVCpu=%p\n", pVM, pVCpu)); Assert(HMCPU_CF_IS_SET(pVCpu, HM_CHANGED_HOST_CONTEXT | HM_CHANGED_HOST_GUEST_SHARED_STATE)); pVCpu->hm.s.fLeaveDone = false; return VINF_SUCCESS; } /** * Thread-context callback for AMD-V. * * @param enmEvent The thread-context event. * @param pVCpu The cross context virtual CPU structure. * @param fGlobalInit Whether global VT-x/AMD-V init. is used. * @thread EMT(pVCpu) */ VMMR0DECL(void) SVMR0ThreadCtxCallback(RTTHREADCTXEVENT enmEvent, PVMCPU pVCpu, bool fGlobalInit) { NOREF(fGlobalInit); switch (enmEvent) { case RTTHREADCTXEVENT_OUT: { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); Assert(VMMR0ThreadCtxHookIsEnabled(pVCpu)); VMCPU_ASSERT_EMT(pVCpu); /* No longjmps (log-flush, locks) in this fragile context. */ VMMRZCallRing3Disable(pVCpu); if (!pVCpu->hm.s.fLeaveDone) { hmR0SvmLeave(pVCpu); pVCpu->hm.s.fLeaveDone = true; } /* Leave HM context, takes care of local init (term). */ int rc = HMR0LeaveCpu(pVCpu); AssertRC(rc); NOREF(rc); /* Restore longjmp state. */ VMMRZCallRing3Enable(pVCpu); STAM_REL_COUNTER_INC(&pVCpu->hm.s.StatSwitchPreempt); break; } case RTTHREADCTXEVENT_IN: { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); Assert(VMMR0ThreadCtxHookIsEnabled(pVCpu)); VMCPU_ASSERT_EMT(pVCpu); /* No longjmps (log-flush, locks) in this fragile context. */ VMMRZCallRing3Disable(pVCpu); /* * Initialize the bare minimum state required for HM. This takes care of * initializing AMD-V if necessary (onlined CPUs, local init etc.) */ int rc = HMR0EnterCpu(pVCpu); AssertRC(rc); NOREF(rc); Assert(HMCPU_CF_IS_SET(pVCpu, HM_CHANGED_HOST_CONTEXT | HM_CHANGED_HOST_GUEST_SHARED_STATE)); pVCpu->hm.s.fLeaveDone = false; /* Restore longjmp state. */ VMMRZCallRing3Enable(pVCpu); break; } default: break; } } /** * Saves the host state. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * * @remarks No-long-jump zone!!! */ VMMR0DECL(int) SVMR0SaveHostState(PVM pVM, PVMCPU pVCpu) { NOREF(pVM); NOREF(pVCpu); /* Nothing to do here. AMD-V does this for us automatically during the world-switch. */ HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_HOST_CONTEXT); return VINF_SUCCESS; } /** * Loads the guest state into the VMCB. * * The CPU state will be loaded from these fields on every successful VM-entry. * Also sets up the appropriate VMRUN function to execute guest code based on * the guest CPU mode. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static int hmR0SvmLoadGuestState(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; AssertMsgReturn(pVmcb, ("Invalid pVmcb\n"), VERR_SVM_INVALID_PVMCB); STAM_PROFILE_ADV_START(&pVCpu->hm.s.StatLoadGuestState, x); int rc = hmR0SvmLoadGuestControlRegs(pVCpu, pVmcb, pCtx); AssertLogRelMsgRCReturn(rc, ("hmR0SvmLoadGuestControlRegs! rc=%Rrc (pVM=%p pVCpu=%p)\n", rc, pVM, pVCpu), rc); hmR0SvmLoadGuestSegmentRegs(pVCpu, pVmcb, pCtx); hmR0SvmLoadGuestMsrs(pVCpu, pVmcb, pCtx); pVmcb->guest.u64RIP = pCtx->rip; pVmcb->guest.u64RSP = pCtx->rsp; pVmcb->guest.u64RFlags = pCtx->eflags.u32; pVmcb->guest.u64RAX = pCtx->rax; rc = hmR0SvmLoadGuestApicState(pVCpu, pVmcb, pCtx); AssertLogRelMsgRCReturn(rc, ("hmR0SvmLoadGuestApicState! rc=%Rrc (pVM=%p pVCpu=%p)\n", rc, pVM, pVCpu), rc); rc = hmR0SvmLoadGuestXcptIntercepts(pVCpu, pVmcb, pCtx); AssertLogRelMsgRCReturn(rc, ("hmR0SvmLoadGuestXcptIntercepts! rc=%Rrc (pVM=%p pVCpu=%p)\n", rc, pVM, pVCpu), rc); rc = hmR0SvmSetupVMRunHandler(pVCpu, pCtx); AssertLogRelMsgRCReturn(rc, ("hmR0SvmSetupVMRunHandler! rc=%Rrc (pVM=%p pVCpu=%p)\n", rc, pVM, pVCpu), rc); /* Clear any unused and reserved bits. */ HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_RIP /* Unused (loaded unconditionally). */ | HM_CHANGED_GUEST_RSP | HM_CHANGED_GUEST_RFLAGS | HM_CHANGED_GUEST_SYSENTER_CS_MSR | HM_CHANGED_GUEST_SYSENTER_EIP_MSR | HM_CHANGED_GUEST_SYSENTER_ESP_MSR | HM_CHANGED_GUEST_LAZY_MSRS /* Unused. */ | HM_CHANGED_SVM_RESERVED1 /* Reserved. */ | HM_CHANGED_SVM_RESERVED2 | HM_CHANGED_SVM_RESERVED3 | HM_CHANGED_SVM_RESERVED4); /* All the guest state bits should be loaded except maybe the host context and/or shared host/guest bits. */ AssertMsg( !HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_ALL_GUEST) || HMCPU_CF_IS_PENDING_ONLY(pVCpu, HM_CHANGED_HOST_CONTEXT | HM_CHANGED_HOST_GUEST_SHARED_STATE), ("fContextUseFlags=%#RX32\n", HMCPU_CF_VALUE(pVCpu))); Log4(("Load: CS:RIP=%04x:%RX64 EFL=%#x SS:RSP=%04x:%RX64\n", pCtx->cs.Sel, pCtx->rip, pCtx->eflags.u, pCtx->ss.Sel, pCtx->rsp)); STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatLoadGuestState, x); return rc; } /** * Loads the state shared between the host and guest into the * VMCB. * * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the VM control block. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ static void hmR0SvmLoadSharedState(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx) { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); Assert(!VMMRZCallRing3IsEnabled(pVCpu)); if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR0)) hmR0SvmLoadSharedCR0(pVCpu, pVmcb, pCtx); if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_DEBUG)) hmR0SvmLoadSharedDebugState(pVCpu, pVmcb, pCtx); /* Unused on AMD-V. */ HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_GUEST_LAZY_MSRS); AssertMsg(!HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_HOST_GUEST_SHARED_STATE), ("fContextUseFlags=%#RX32\n", HMCPU_CF_VALUE(pVCpu))); } /** * Saves the entire guest state from the VMCB into the * guest-CPU context. Currently there is no residual state left in the CPU that * is not updated in the VMCB. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pMixedCtx Pointer to the guest-CPU context. The data may be * out-of-sync. Make sure to update the required fields * before using them. */ static void hmR0SvmSaveGuestState(PVMCPU pVCpu, PCPUMCTX pMixedCtx) { Assert(VMMRZCallRing3IsEnabled(pVCpu)); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pMixedCtx->rip = pVmcb->guest.u64RIP; pMixedCtx->rsp = pVmcb->guest.u64RSP; pMixedCtx->eflags.u32 = pVmcb->guest.u64RFlags; pMixedCtx->rax = pVmcb->guest.u64RAX; /* * Guest interrupt shadow. */ if (pVmcb->ctrl.u64IntShadow & SVM_INTERRUPT_SHADOW_ACTIVE) EMSetInhibitInterruptsPC(pVCpu, pMixedCtx->rip); else if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS)) VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS); /* * Guest Control registers: CR2, CR3 (handled at the end) - accesses to other control registers are always intercepted. */ pMixedCtx->cr2 = pVmcb->guest.u64CR2; /* * Guest MSRs. */ pMixedCtx->msrSTAR = pVmcb->guest.u64STAR; /* legacy syscall eip, cs & ss */ pMixedCtx->msrLSTAR = pVmcb->guest.u64LSTAR; /* 64-bit mode syscall rip */ pMixedCtx->msrCSTAR = pVmcb->guest.u64CSTAR; /* compatibility mode syscall rip */ pMixedCtx->msrSFMASK = pVmcb->guest.u64SFMASK; /* syscall flag mask */ pMixedCtx->msrKERNELGSBASE = pVmcb->guest.u64KernelGSBase; /* swapgs exchange value */ pMixedCtx->SysEnter.cs = pVmcb->guest.u64SysEnterCS; pMixedCtx->SysEnter.eip = pVmcb->guest.u64SysEnterEIP; pMixedCtx->SysEnter.esp = pVmcb->guest.u64SysEnterESP; /* * Guest segment registers (includes FS, GS base MSRs for 64-bit guests). */ HMSVM_SAVE_SEG_REG(CS, cs); HMSVM_SAVE_SEG_REG(SS, ss); HMSVM_SAVE_SEG_REG(DS, ds); HMSVM_SAVE_SEG_REG(ES, es); HMSVM_SAVE_SEG_REG(FS, fs); HMSVM_SAVE_SEG_REG(GS, gs); /* * Correct the hidden CS granularity bit. Haven't seen it being wrong in any other * register (yet). */ /** @todo SELM might need to be fixed as it too should not care about the * granularity bit. See @bugref{6785}. */ if ( !pMixedCtx->cs.Attr.n.u1Granularity && pMixedCtx->cs.Attr.n.u1Present && pMixedCtx->cs.u32Limit > UINT32_C(0xfffff)) { Assert((pMixedCtx->cs.u32Limit & 0xfff) == 0xfff); pMixedCtx->cs.Attr.n.u1Granularity = 1; } #ifdef VBOX_STRICT # define HMSVM_ASSERT_SEG_GRANULARITY(reg) \ AssertMsg( !pMixedCtx->reg.Attr.n.u1Present \ || ( pMixedCtx->reg.Attr.n.u1Granularity \ ? (pMixedCtx->reg.u32Limit & 0xfff) == 0xfff \ : pMixedCtx->reg.u32Limit <= UINT32_C(0xfffff)), \ ("Invalid Segment Attributes Limit=%#RX32 Attr=%#RX32 Base=%#RX64\n", pMixedCtx->reg.u32Limit, \ pMixedCtx->reg.Attr.u, pMixedCtx->reg.u64Base)) HMSVM_ASSERT_SEG_GRANULARITY(cs); HMSVM_ASSERT_SEG_GRANULARITY(ss); HMSVM_ASSERT_SEG_GRANULARITY(ds); HMSVM_ASSERT_SEG_GRANULARITY(es); HMSVM_ASSERT_SEG_GRANULARITY(fs); HMSVM_ASSERT_SEG_GRANULARITY(gs); # undef HMSVM_ASSERT_SEL_GRANULARITY #endif /* * Sync the hidden SS DPL field. AMD CPUs have a separate CPL field in the VMCB and uses that * and thus it's possible that when the CPL changes during guest execution that the SS DPL * isn't updated by AMD-V. Observed on some AMD Fusion CPUs with 64-bit guests. * See AMD spec. 15.5.1 "Basic operation". */ Assert(!(pVmcb->guest.u8CPL & ~0x3)); pMixedCtx->ss.Attr.n.u2Dpl = pVmcb->guest.u8CPL & 0x3; /* * Guest TR. * Fixup TR attributes so it's compatible with Intel. Important when saved-states are used * between Intel and AMD. See @bugref{6208#c39}. * ASSUME that it's normally correct and that we're in 32-bit or 64-bit mode. */ HMSVM_SAVE_SEG_REG(TR, tr); if (pMixedCtx->tr.Attr.n.u4Type != X86_SEL_TYPE_SYS_386_TSS_BUSY) { if ( pMixedCtx->tr.Attr.n.u4Type == X86_SEL_TYPE_SYS_386_TSS_AVAIL || CPUMIsGuestInLongModeEx(pMixedCtx)) pMixedCtx->tr.Attr.n.u4Type = X86_SEL_TYPE_SYS_386_TSS_BUSY; else if (pMixedCtx->tr.Attr.n.u4Type == X86_SEL_TYPE_SYS_286_TSS_AVAIL) pMixedCtx->tr.Attr.n.u4Type = X86_SEL_TYPE_SYS_286_TSS_BUSY; } /* * Guest Descriptor-Table registers. */ HMSVM_SAVE_SEG_REG(LDTR, ldtr); pMixedCtx->gdtr.cbGdt = pVmcb->guest.GDTR.u32Limit; pMixedCtx->gdtr.pGdt = pVmcb->guest.GDTR.u64Base; pMixedCtx->idtr.cbIdt = pVmcb->guest.IDTR.u32Limit; pMixedCtx->idtr.pIdt = pVmcb->guest.IDTR.u64Base; /* * Guest Debug registers. */ if (!pVCpu->hm.s.fUsingHyperDR7) { pMixedCtx->dr[6] = pVmcb->guest.u64DR6; pMixedCtx->dr[7] = pVmcb->guest.u64DR7; } else { Assert(pVmcb->guest.u64DR7 == CPUMGetHyperDR7(pVCpu)); CPUMSetHyperDR6(pVCpu, pVmcb->guest.u64DR6); } /* * With Nested Paging, CR3 changes are not intercepted. Therefore, sync. it now. * This is done as the very last step of syncing the guest state, as PGMUpdateCR3() may cause longjmp's to ring-3. */ if ( pVCpu->CTX_SUFF(pVM)->hm.s.fNestedPaging && pMixedCtx->cr3 != pVmcb->guest.u64CR3) { CPUMSetGuestCR3(pVCpu, pVmcb->guest.u64CR3); PGMUpdateCR3(pVCpu, pVmcb->guest.u64CR3); } } /** * Does the necessary state syncing before returning to ring-3 for any reason * (longjmp, preemption, voluntary exits to ring-3) from AMD-V. * * @param pVCpu The cross context virtual CPU structure. * * @remarks No-long-jmp zone!!! */ static void hmR0SvmLeave(PVMCPU pVCpu) { Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); Assert(!VMMRZCallRing3IsEnabled(pVCpu)); Assert(VMMR0IsLogFlushDisabled(pVCpu)); /* * !!! IMPORTANT !!! * If you modify code here, make sure to check whether hmR0SvmCallRing3Callback() needs to be updated too. */ /* Restore host FPU state if necessary and resync on next R0 reentry .*/ if (CPUMR0FpuStateMaybeSaveGuestAndRestoreHost(pVCpu)) HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR0); /* * Restore host debug registers if necessary and resync on next R0 reentry. */ #ifdef VBOX_STRICT if (CPUMIsHyperDebugStateActive(pVCpu)) { PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; Assert(pVmcb->ctrl.u16InterceptRdDRx == 0xffff); Assert(pVmcb->ctrl.u16InterceptWrDRx == 0xffff); } #endif if (CPUMR0DebugStateMaybeSaveGuestAndRestoreHost(pVCpu, false /* save DR6 */)) HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_DEBUG); Assert(!CPUMIsHyperDebugStateActive(pVCpu)); Assert(!CPUMIsGuestDebugStateActive(pVCpu)); STAM_PROFILE_ADV_SET_STOPPED(&pVCpu->hm.s.StatEntry); STAM_PROFILE_ADV_SET_STOPPED(&pVCpu->hm.s.StatLoadGuestState); STAM_PROFILE_ADV_SET_STOPPED(&pVCpu->hm.s.StatExit1); STAM_PROFILE_ADV_SET_STOPPED(&pVCpu->hm.s.StatExit2); STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchLongJmpToR3); VMCPU_CMPXCHG_STATE(pVCpu, VMCPUSTATE_STARTED_HM, VMCPUSTATE_STARTED_EXEC); } /** * Leaves the AMD-V session. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. */ static int hmR0SvmLeaveSession(PVMCPU pVCpu) { HM_DISABLE_PREEMPT(); Assert(!VMMRZCallRing3IsEnabled(pVCpu)); Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); /* When thread-context hooks are used, we can avoid doing the leave again if we had been preempted before and done this from the SVMR0ThreadCtxCallback(). */ if (!pVCpu->hm.s.fLeaveDone) { hmR0SvmLeave(pVCpu); pVCpu->hm.s.fLeaveDone = true; } /* * !!! IMPORTANT !!! * If you modify code here, make sure to check whether hmR0SvmCallRing3Callback() needs to be updated too. */ /** @todo eliminate the need for calling VMMR0ThreadCtxHookDisable here! */ /* Deregister hook now that we've left HM context before re-enabling preemption. */ VMMR0ThreadCtxHookDisable(pVCpu); /* Leave HM context. This takes care of local init (term). */ int rc = HMR0LeaveCpu(pVCpu); HM_RESTORE_PREEMPT(); return rc; } /** * Does the necessary state syncing before doing a longjmp to ring-3. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure. * * @remarks No-long-jmp zone!!! */ static int hmR0SvmLongJmpToRing3(PVMCPU pVCpu) { return hmR0SvmLeaveSession(pVCpu); } /** * VMMRZCallRing3() callback wrapper which saves the guest state (or restores * any remaining host state) before we longjump to ring-3 and possibly get * preempted. * * @param pVCpu The cross context virtual CPU structure. * @param enmOperation The operation causing the ring-3 longjump. * @param pvUser The user argument (pointer to the possibly * out-of-date guest-CPU context). */ static DECLCALLBACK(int) hmR0SvmCallRing3Callback(PVMCPU pVCpu, VMMCALLRING3 enmOperation, void *pvUser) { RT_NOREF_PV(pvUser); if (enmOperation == VMMCALLRING3_VM_R0_ASSERTION) { /* * !!! IMPORTANT !!! * If you modify code here, make sure to check whether hmR0SvmLeave() and hmR0SvmLeaveSession() needs * to be updated too. This is a stripped down version which gets out ASAP trying to not trigger any assertion. */ VMMRZCallRing3RemoveNotification(pVCpu); VMMRZCallRing3Disable(pVCpu); HM_DISABLE_PREEMPT(); /* Restore host FPU state if necessary and resync on next R0 reentry. */ CPUMR0FpuStateMaybeSaveGuestAndRestoreHost(pVCpu); /* Restore host debug registers if necessary and resync on next R0 reentry. */ CPUMR0DebugStateMaybeSaveGuestAndRestoreHost(pVCpu, false /* save DR6 */); /* Deregister the hook now that we've left HM context before re-enabling preemption. */ /** @todo eliminate the need for calling VMMR0ThreadCtxHookDisable here! */ VMMR0ThreadCtxHookDisable(pVCpu); /* Leave HM context. This takes care of local init (term). */ HMR0LeaveCpu(pVCpu); HM_RESTORE_PREEMPT(); return VINF_SUCCESS; } Assert(pVCpu); Assert(pvUser); Assert(VMMRZCallRing3IsEnabled(pVCpu)); HMSVM_ASSERT_PREEMPT_SAFE(); VMMRZCallRing3Disable(pVCpu); Assert(VMMR0IsLogFlushDisabled(pVCpu)); Log4(("hmR0SvmCallRing3Callback->hmR0SvmLongJmpToRing3\n")); int rc = hmR0SvmLongJmpToRing3(pVCpu); AssertRCReturn(rc, rc); VMMRZCallRing3Enable(pVCpu); return VINF_SUCCESS; } /** * Take necessary actions before going back to ring-3. * * An action requires us to go back to ring-3. This function does the necessary * steps before we can safely return to ring-3. This is not the same as longjmps * to ring-3, this is voluntary. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param rcExit The reason for exiting to ring-3. Can be * VINF_VMM_UNKNOWN_RING3_CALL. */ static void hmR0SvmExitToRing3(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx, int rcExit) { Assert(pVM); Assert(pVCpu); Assert(pCtx); HMSVM_ASSERT_PREEMPT_SAFE(); /* Please, no longjumps here (any logging shouldn't flush jump back to ring-3). NO LOGGING BEFORE THIS POINT! */ VMMRZCallRing3Disable(pVCpu); Log4(("hmR0SvmExitToRing3: rcExit=%d\n", rcExit)); /* We need to do this only while truly exiting the "inner loop" back to ring-3 and -not- for any longjmp to ring3. */ if (pVCpu->hm.s.Event.fPending) { hmR0SvmPendingEventToTrpmTrap(pVCpu); Assert(!pVCpu->hm.s.Event.fPending); } /* If we're emulating an instruction, we shouldn't have any TRPM traps pending and if we're injecting an event we should have a TRPM trap pending. */ AssertMsg(rcExit != VINF_EM_RAW_INJECT_TRPM_EVENT || TRPMHasTrap(pVCpu), ("rcExit=%Rrc\n", rcExit)); AssertMsg(rcExit != VINF_EM_RAW_EMULATE_INSTR || !TRPMHasTrap(pVCpu), ("rcExit=%Rrc\n", rcExit)); /* Sync. the necessary state for going back to ring-3. */ hmR0SvmLeaveSession(pVCpu); STAM_COUNTER_DEC(&pVCpu->hm.s.StatSwitchLongJmpToR3); VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TO_R3); CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_SYSENTER_MSR | CPUM_CHANGED_LDTR | CPUM_CHANGED_GDTR | CPUM_CHANGED_IDTR | CPUM_CHANGED_TR | CPUM_CHANGED_HIDDEN_SEL_REGS); if ( pVM->hm.s.fNestedPaging && CPUMIsGuestPagingEnabledEx(pCtx)) { CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_GLOBAL_TLB_FLUSH); } /* On our way back from ring-3 reload the guest state if there is a possibility of it being changed. */ if (rcExit != VINF_EM_RAW_INTERRUPT) HMCPU_CF_SET(pVCpu, HM_CHANGED_ALL_GUEST); STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchExitToR3); /* We do -not- want any longjmp notifications after this! We must return to ring-3 ASAP. */ VMMRZCallRing3RemoveNotification(pVCpu); VMMRZCallRing3Enable(pVCpu); } /** * Updates the use of TSC offsetting mode for the CPU and adjusts the necessary * intercepts. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * * @remarks No-long-jump zone!!! */ static void hmR0SvmUpdateTscOffsetting(PVM pVM, PVMCPU pVCpu) { bool fParavirtTsc; PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; bool fCanUseRealTsc = TMCpuTickCanUseRealTSC(pVM, pVCpu, &pVmcb->ctrl.u64TSCOffset, &fParavirtTsc); if (fCanUseRealTsc) { pVmcb->ctrl.u32InterceptCtrl1 &= ~SVM_CTRL1_INTERCEPT_RDTSC; pVmcb->ctrl.u32InterceptCtrl2 &= ~SVM_CTRL2_INTERCEPT_RDTSCP; STAM_COUNTER_INC(&pVCpu->hm.s.StatTscOffset); } else { pVmcb->ctrl.u32InterceptCtrl1 |= SVM_CTRL1_INTERCEPT_RDTSC; pVmcb->ctrl.u32InterceptCtrl2 |= SVM_CTRL2_INTERCEPT_RDTSCP; STAM_COUNTER_INC(&pVCpu->hm.s.StatTscIntercept); } pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; /** @todo later optimize this to be done elsewhere and not before every * VM-entry. */ if (fParavirtTsc) { /* Currently neither Hyper-V nor KVM need to update their paravirt. TSC information before every VM-entry, hence disable it for performance sake. */ #if 0 int rc = GIMR0UpdateParavirtTsc(pVM, 0 /* u64Offset */); AssertRC(rc); #endif STAM_COUNTER_INC(&pVCpu->hm.s.StatTscParavirt); } } /** * Sets an event as a pending event to be injected into the guest. * * @param pVCpu The cross context virtual CPU structure. * @param pEvent Pointer to the SVM event. * @param GCPtrFaultAddress The fault-address (CR2) in case it's a * page-fault. * * @remarks Statistics counter assumes this is a guest event being reflected to * the guest i.e. 'StatInjectPendingReflect' is incremented always. */ DECLINLINE(void) hmR0SvmSetPendingEvent(PVMCPU pVCpu, PSVMEVENT pEvent, RTGCUINTPTR GCPtrFaultAddress) { Assert(!pVCpu->hm.s.Event.fPending); Assert(pEvent->n.u1Valid); pVCpu->hm.s.Event.u64IntInfo = pEvent->u; pVCpu->hm.s.Event.fPending = true; pVCpu->hm.s.Event.GCPtrFaultAddress = GCPtrFaultAddress; Log4(("hmR0SvmSetPendingEvent: u=%#RX64 u8Vector=%#x Type=%#x ErrorCodeValid=%RTbool ErrorCode=%#RX32\n", pEvent->u, pEvent->n.u8Vector, (uint8_t)pEvent->n.u3Type, !!pEvent->n.u1ErrorCodeValid, pEvent->n.u32ErrorCode)); } /** * Injects an event into the guest upon VMRUN by updating the relevant field * in the VMCB. * * @param pVCpu The cross context virtual CPU structure. * @param pVmcb Pointer to the guest VM control block. * @param pCtx Pointer to the guest-CPU context. * @param pEvent Pointer to the event. * * @remarks No-long-jump zone!!! * @remarks Requires CR0! */ DECLINLINE(void) hmR0SvmInjectEventVmcb(PVMCPU pVCpu, PSVMVMCB pVmcb, PCPUMCTX pCtx, PSVMEVENT pEvent) { NOREF(pVCpu); NOREF(pCtx); pVmcb->ctrl.EventInject.u = pEvent->u; STAM_COUNTER_INC(&pVCpu->hm.s.paStatInjectedIrqsR0[pEvent->n.u8Vector & MASK_INJECT_IRQ_STAT]); Log4(("hmR0SvmInjectEventVmcb: u=%#RX64 u8Vector=%#x Type=%#x ErrorCodeValid=%RTbool ErrorCode=%#RX32\n", pEvent->u, pEvent->n.u8Vector, (uint8_t)pEvent->n.u3Type, !!pEvent->n.u1ErrorCodeValid, pEvent->n.u32ErrorCode)); } /** * Converts any TRPM trap into a pending HM event. This is typically used when * entering from ring-3 (not longjmp returns). * * @param pVCpu The cross context virtual CPU structure. */ static void hmR0SvmTrpmTrapToPendingEvent(PVMCPU pVCpu) { Assert(TRPMHasTrap(pVCpu)); Assert(!pVCpu->hm.s.Event.fPending); uint8_t uVector; TRPMEVENT enmTrpmEvent; RTGCUINT uErrCode; RTGCUINTPTR GCPtrFaultAddress; uint8_t cbInstr; int rc = TRPMQueryTrapAll(pVCpu, &uVector, &enmTrpmEvent, &uErrCode, &GCPtrFaultAddress, &cbInstr); AssertRC(rc); SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u8Vector = uVector; /* Refer AMD spec. 15.20 "Event Injection" for the format. */ if (enmTrpmEvent == TRPM_TRAP) { Event.n.u3Type = SVM_EVENT_EXCEPTION; switch (uVector) { case X86_XCPT_NMI: { Event.n.u3Type = SVM_EVENT_NMI; break; } case X86_XCPT_PF: case X86_XCPT_DF: case X86_XCPT_TS: case X86_XCPT_NP: case X86_XCPT_SS: case X86_XCPT_GP: case X86_XCPT_AC: { Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = uErrCode; break; } } } else if (enmTrpmEvent == TRPM_HARDWARE_INT) Event.n.u3Type = SVM_EVENT_EXTERNAL_IRQ; else if (enmTrpmEvent == TRPM_SOFTWARE_INT) Event.n.u3Type = SVM_EVENT_SOFTWARE_INT; else AssertMsgFailed(("Invalid TRPM event type %d\n", enmTrpmEvent)); rc = TRPMResetTrap(pVCpu); AssertRC(rc); Log4(("TRPM->HM event: u=%#RX64 u8Vector=%#x uErrorCodeValid=%RTbool uErrorCode=%#RX32\n", Event.u, Event.n.u8Vector, !!Event.n.u1ErrorCodeValid, Event.n.u32ErrorCode)); hmR0SvmSetPendingEvent(pVCpu, &Event, GCPtrFaultAddress); } /** * Converts any pending SVM event into a TRPM trap. Typically used when leaving * AMD-V to execute any instruction. * * @param pVCpu The cross context virtual CPU structure. */ static void hmR0SvmPendingEventToTrpmTrap(PVMCPU pVCpu) { Assert(pVCpu->hm.s.Event.fPending); Assert(TRPMQueryTrap(pVCpu, NULL /* pu8TrapNo */, NULL /* pEnmType */) == VERR_TRPM_NO_ACTIVE_TRAP); SVMEVENT Event; Event.u = pVCpu->hm.s.Event.u64IntInfo; uint8_t uVector = Event.n.u8Vector; uint8_t uVectorType = Event.n.u3Type; TRPMEVENT enmTrapType; switch (uVectorType) { case SVM_EVENT_EXTERNAL_IRQ: enmTrapType = TRPM_HARDWARE_INT; break; case SVM_EVENT_SOFTWARE_INT: enmTrapType = TRPM_SOFTWARE_INT; break; case SVM_EVENT_EXCEPTION: case SVM_EVENT_NMI: enmTrapType = TRPM_TRAP; break; default: AssertMsgFailed(("Invalid pending-event type %#x\n", uVectorType)); enmTrapType = TRPM_32BIT_HACK; break; } Log4(("HM event->TRPM: uVector=%#x enmTrapType=%d\n", uVector, uVectorType)); int rc = TRPMAssertTrap(pVCpu, uVector, enmTrapType); AssertRC(rc); if (Event.n.u1ErrorCodeValid) TRPMSetErrorCode(pVCpu, Event.n.u32ErrorCode); if ( uVectorType == SVM_EVENT_EXCEPTION && uVector == X86_XCPT_PF) { TRPMSetFaultAddress(pVCpu, pVCpu->hm.s.Event.GCPtrFaultAddress); Assert(pVCpu->hm.s.Event.GCPtrFaultAddress == CPUMGetGuestCR2(pVCpu)); } else if (uVectorType == SVM_EVENT_SOFTWARE_INT) { AssertMsg( uVectorType == SVM_EVENT_SOFTWARE_INT || (uVector == X86_XCPT_BP || uVector == X86_XCPT_OF), ("Invalid vector: uVector=%#x uVectorType=%#x\n", uVector, uVectorType)); TRPMSetInstrLength(pVCpu, pVCpu->hm.s.Event.cbInstr); } pVCpu->hm.s.Event.fPending = false; } /** * Gets the guest's interrupt-shadow. * * @returns The guest's interrupt-shadow. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! * @remarks Has side-effects with VMCPU_FF_INHIBIT_INTERRUPTS force-flag. */ DECLINLINE(uint32_t) hmR0SvmGetGuestIntrShadow(PVMCPU pVCpu, PCPUMCTX pCtx) { /* * Instructions like STI and MOV SS inhibit interrupts till the next instruction completes. Check if we should * inhibit interrupts or clear any existing interrupt-inhibition. */ uint32_t uIntrState = 0; if (VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS)) { if (pCtx->rip != EMGetInhibitInterruptsPC(pVCpu)) { /* * We can clear the inhibit force flag as even if we go back to the recompiler without executing guest code in * AMD-V, the flag's condition to be cleared is met and thus the cleared state is correct. */ VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS); } else uIntrState = SVM_INTERRUPT_SHADOW_ACTIVE; } return uIntrState; } /** * Sets the virtual interrupt intercept control in the VMCB which * instructs AMD-V to cause a \#VMEXIT as soon as the guest is in a state to * receive interrupts. * * @param pVmcb Pointer to the VM control block. */ DECLINLINE(void) hmR0SvmSetVirtIntrIntercept(PSVMVMCB pVmcb) { if (!(pVmcb->ctrl.u32InterceptCtrl1 & SVM_CTRL1_INTERCEPT_VINTR)) { pVmcb->ctrl.IntCtrl.n.u1VIrqValid = 1; /* A virtual interrupt is pending. */ pVmcb->ctrl.IntCtrl.n.u8VIrqVector = 0; /* Not necessary as we #VMEXIT for delivering the interrupt. */ pVmcb->ctrl.u32InterceptCtrl1 |= SVM_CTRL1_INTERCEPT_VINTR; pVmcb->ctrl.u64VmcbCleanBits &= ~(HMSVM_VMCB_CLEAN_INTERCEPTS | HMSVM_VMCB_CLEAN_TPR); Log4(("Setting VINTR intercept\n")); } } /** * Sets the IRET intercept control in the VMCB which instructs AMD-V to cause a * \#VMEXIT as soon as a guest starts executing an IRET. This is used to unblock * virtual NMIs. * * @param pVmcb Pointer to the VM control block. */ DECLINLINE(void) hmR0SvmSetIretIntercept(PSVMVMCB pVmcb) { if (!(pVmcb->ctrl.u32InterceptCtrl1 & SVM_CTRL1_INTERCEPT_IRET)) { pVmcb->ctrl.u32InterceptCtrl1 |= SVM_CTRL1_INTERCEPT_IRET; pVmcb->ctrl.u64VmcbCleanBits &= ~(HMSVM_VMCB_CLEAN_INTERCEPTS); Log4(("Setting IRET intercept\n")); } } /** * Clears the IRET intercept control in the VMCB. * * @param pVmcb Pointer to the VM control block. */ DECLINLINE(void) hmR0SvmClearIretIntercept(PSVMVMCB pVmcb) { if (pVmcb->ctrl.u32InterceptCtrl1 & SVM_CTRL1_INTERCEPT_IRET) { pVmcb->ctrl.u32InterceptCtrl1 &= ~SVM_CTRL1_INTERCEPT_IRET; pVmcb->ctrl.u64VmcbCleanBits &= ~(HMSVM_VMCB_CLEAN_INTERCEPTS); Log4(("Clearing IRET intercept\n")); } } /** * Evaluates the event to be delivered to the guest and sets it as the pending * event. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static void hmR0SvmEvaluatePendingEvent(PVMCPU pVCpu, PCPUMCTX pCtx) { Assert(!pVCpu->hm.s.Event.fPending); Log4Func(("\n")); bool const fIntShadow = RT_BOOL(hmR0SvmGetGuestIntrShadow(pVCpu, pCtx)); bool const fBlockInt = !(pCtx->eflags.u32 & X86_EFL_IF); bool const fBlockNmi = RT_BOOL(VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_BLOCK_NMIS)); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; #ifdef VBOX_WITH_NEW_APIC if (VMCPU_FF_TEST_AND_CLEAR(pVCpu, VMCPU_FF_UPDATE_APIC)) APICUpdatePendingInterrupts(pVCpu); #endif SVMEVENT Event; Event.u = 0; /** @todo SMI. SMIs take priority over NMIs. */ if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_INTERRUPT_NMI)) /* NMI. NMIs take priority over regular interrupts . */ { if (fBlockNmi) hmR0SvmSetIretIntercept(pVmcb); else if (fIntShadow) hmR0SvmSetVirtIntrIntercept(pVmcb); else { Log4(("Pending NMI\n")); Event.n.u1Valid = 1; Event.n.u8Vector = X86_XCPT_NMI; Event.n.u3Type = SVM_EVENT_NMI; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); hmR0SvmSetIretIntercept(pVmcb); VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_NMI); } } else if ( VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_INTERRUPT_PIC) && !pVCpu->hm.s.fSingleInstruction) { /* * Check if the guest can receive external interrupts (PIC/APIC). Once PDMGetInterrupt() returns * a valid interrupt we must- deliver the interrupt. We can no longer re-request it from the APIC. */ if ( !fBlockInt && !fIntShadow) { uint8_t u8Interrupt; int rc = PDMGetInterrupt(pVCpu, &u8Interrupt); if (RT_SUCCESS(rc)) { Log4(("Injecting external interrupt u8Interrupt=%#x\n", u8Interrupt)); Event.n.u1Valid = 1; Event.n.u8Vector = u8Interrupt; Event.n.u3Type = SVM_EVENT_EXTERNAL_IRQ; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } else if (rc == VERR_APIC_INTR_MASKED_BY_TPR) { /* * AMD-V has no TPR thresholding feature. We just avoid posting the interrupt. * We just avoid delivering the TPR-masked interrupt here. TPR will be updated * always via hmR0SvmLoadGuestState() -> hmR0SvmLoadGuestApicState(). */ STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchTprMaskedIrq); } else STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchGuestIrq); } else hmR0SvmSetVirtIntrIntercept(pVmcb); } } /** * Injects any pending events into the guest if the guest is in a state to * receive them. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static void hmR0SvmInjectPendingEvent(PVMCPU pVCpu, PCPUMCTX pCtx) { Assert(!TRPMHasTrap(pVCpu)); Assert(!VMMRZCallRing3IsEnabled(pVCpu)); bool const fIntShadow = RT_BOOL(hmR0SvmGetGuestIntrShadow(pVCpu, pCtx)); bool const fBlockInt = !(pCtx->eflags.u32 & X86_EFL_IF); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; if (pVCpu->hm.s.Event.fPending) /* First, inject any pending HM events. */ { SVMEVENT Event; Event.u = pVCpu->hm.s.Event.u64IntInfo; Assert(Event.n.u1Valid); #ifdef VBOX_STRICT if (Event.n.u3Type == SVM_EVENT_EXTERNAL_IRQ) { Assert(!fBlockInt); Assert(!fIntShadow); } else if (Event.n.u3Type == SVM_EVENT_NMI) Assert(!fIntShadow); #endif Log4(("Injecting pending HM event.\n")); hmR0SvmInjectEventVmcb(pVCpu, pVmcb, pCtx, &Event); pVCpu->hm.s.Event.fPending = false; #ifdef VBOX_WITH_STATISTICS if (Event.n.u3Type == SVM_EVENT_EXTERNAL_IRQ) STAM_COUNTER_INC(&pVCpu->hm.s.StatInjectInterrupt); else STAM_COUNTER_INC(&pVCpu->hm.s.StatInjectXcpt); #endif } /* Update the guest interrupt shadow in the VMCB. */ pVmcb->ctrl.u64IntShadow = !!fIntShadow; NOREF(fBlockInt); } /** * Reports world-switch error and dumps some useful debug info. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param rcVMRun The return code from VMRUN (or * VERR_SVM_INVALID_GUEST_STATE for invalid * guest-state). * @param pCtx Pointer to the guest-CPU context. */ static void hmR0SvmReportWorldSwitchError(PVM pVM, PVMCPU pVCpu, int rcVMRun, PCPUMCTX pCtx) { NOREF(pCtx); HMSVM_ASSERT_PREEMPT_SAFE(); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; if (rcVMRun == VERR_SVM_INVALID_GUEST_STATE) { HMDumpRegs(pVM, pVCpu, pCtx); NOREF(pVM); #ifdef VBOX_STRICT Log4(("ctrl.u64VmcbCleanBits %#RX64\n", pVmcb->ctrl.u64VmcbCleanBits)); Log4(("ctrl.u16InterceptRdCRx %#x\n", pVmcb->ctrl.u16InterceptRdCRx)); Log4(("ctrl.u16InterceptWrCRx %#x\n", pVmcb->ctrl.u16InterceptWrCRx)); Log4(("ctrl.u16InterceptRdDRx %#x\n", pVmcb->ctrl.u16InterceptRdDRx)); Log4(("ctrl.u16InterceptWrDRx %#x\n", pVmcb->ctrl.u16InterceptWrDRx)); Log4(("ctrl.u32InterceptException %#x\n", pVmcb->ctrl.u32InterceptException)); Log4(("ctrl.u32InterceptCtrl1 %#x\n", pVmcb->ctrl.u32InterceptCtrl1)); Log4(("ctrl.u32InterceptCtrl2 %#x\n", pVmcb->ctrl.u32InterceptCtrl2)); Log4(("ctrl.u64IOPMPhysAddr %#RX64\n", pVmcb->ctrl.u64IOPMPhysAddr)); Log4(("ctrl.u64MSRPMPhysAddr %#RX64\n", pVmcb->ctrl.u64MSRPMPhysAddr)); Log4(("ctrl.u64TSCOffset %#RX64\n", pVmcb->ctrl.u64TSCOffset)); Log4(("ctrl.TLBCtrl.u32ASID %#x\n", pVmcb->ctrl.TLBCtrl.n.u32ASID)); Log4(("ctrl.TLBCtrl.u8TLBFlush %#x\n", pVmcb->ctrl.TLBCtrl.n.u8TLBFlush)); Log4(("ctrl.TLBCtrl.u24Reserved %#x\n", pVmcb->ctrl.TLBCtrl.n.u24Reserved)); Log4(("ctrl.IntCtrl.u8VTPR %#x\n", pVmcb->ctrl.IntCtrl.n.u8VTPR)); Log4(("ctrl.IntCtrl.u1VIrqValid %#x\n", pVmcb->ctrl.IntCtrl.n.u1VIrqValid)); Log4(("ctrl.IntCtrl.u7Reserved %#x\n", pVmcb->ctrl.IntCtrl.n.u7Reserved)); Log4(("ctrl.IntCtrl.u4VIrqPriority %#x\n", pVmcb->ctrl.IntCtrl.n.u4VIrqPriority)); Log4(("ctrl.IntCtrl.u1IgnoreTPR %#x\n", pVmcb->ctrl.IntCtrl.n.u1IgnoreTPR)); Log4(("ctrl.IntCtrl.u3Reserved %#x\n", pVmcb->ctrl.IntCtrl.n.u3Reserved)); Log4(("ctrl.IntCtrl.u1VIrqMasking %#x\n", pVmcb->ctrl.IntCtrl.n.u1VIrqMasking)); Log4(("ctrl.IntCtrl.u6Reserved %#x\n", pVmcb->ctrl.IntCtrl.n.u6Reserved)); Log4(("ctrl.IntCtrl.u8VIrqVector %#x\n", pVmcb->ctrl.IntCtrl.n.u8VIrqVector)); Log4(("ctrl.IntCtrl.u24Reserved %#x\n", pVmcb->ctrl.IntCtrl.n.u24Reserved)); Log4(("ctrl.u64IntShadow %#RX64\n", pVmcb->ctrl.u64IntShadow)); Log4(("ctrl.u64ExitCode %#RX64\n", pVmcb->ctrl.u64ExitCode)); Log4(("ctrl.u64ExitInfo1 %#RX64\n", pVmcb->ctrl.u64ExitInfo1)); Log4(("ctrl.u64ExitInfo2 %#RX64\n", pVmcb->ctrl.u64ExitInfo2)); Log4(("ctrl.ExitIntInfo.u8Vector %#x\n", pVmcb->ctrl.ExitIntInfo.n.u8Vector)); Log4(("ctrl.ExitIntInfo.u3Type %#x\n", pVmcb->ctrl.ExitIntInfo.n.u3Type)); Log4(("ctrl.ExitIntInfo.u1ErrorCodeValid %#x\n", pVmcb->ctrl.ExitIntInfo.n.u1ErrorCodeValid)); Log4(("ctrl.ExitIntInfo.u19Reserved %#x\n", pVmcb->ctrl.ExitIntInfo.n.u19Reserved)); Log4(("ctrl.ExitIntInfo.u1Valid %#x\n", pVmcb->ctrl.ExitIntInfo.n.u1Valid)); Log4(("ctrl.ExitIntInfo.u32ErrorCode %#x\n", pVmcb->ctrl.ExitIntInfo.n.u32ErrorCode)); Log4(("ctrl.NestedPaging %#RX64\n", pVmcb->ctrl.NestedPaging.u)); Log4(("ctrl.EventInject.u8Vector %#x\n", pVmcb->ctrl.EventInject.n.u8Vector)); Log4(("ctrl.EventInject.u3Type %#x\n", pVmcb->ctrl.EventInject.n.u3Type)); Log4(("ctrl.EventInject.u1ErrorCodeValid %#x\n", pVmcb->ctrl.EventInject.n.u1ErrorCodeValid)); Log4(("ctrl.EventInject.u19Reserved %#x\n", pVmcb->ctrl.EventInject.n.u19Reserved)); Log4(("ctrl.EventInject.u1Valid %#x\n", pVmcb->ctrl.EventInject.n.u1Valid)); Log4(("ctrl.EventInject.u32ErrorCode %#x\n", pVmcb->ctrl.EventInject.n.u32ErrorCode)); Log4(("ctrl.u64NestedPagingCR3 %#RX64\n", pVmcb->ctrl.u64NestedPagingCR3)); Log4(("ctrl.u64LBRVirt %#RX64\n", pVmcb->ctrl.u64LBRVirt)); Log4(("guest.CS.u16Sel %RTsel\n", pVmcb->guest.CS.u16Sel)); Log4(("guest.CS.u16Attr %#x\n", pVmcb->guest.CS.u16Attr)); Log4(("guest.CS.u32Limit %#RX32\n", pVmcb->guest.CS.u32Limit)); Log4(("guest.CS.u64Base %#RX64\n", pVmcb->guest.CS.u64Base)); Log4(("guest.DS.u16Sel %#RTsel\n", pVmcb->guest.DS.u16Sel)); Log4(("guest.DS.u16Attr %#x\n", pVmcb->guest.DS.u16Attr)); Log4(("guest.DS.u32Limit %#RX32\n", pVmcb->guest.DS.u32Limit)); Log4(("guest.DS.u64Base %#RX64\n", pVmcb->guest.DS.u64Base)); Log4(("guest.ES.u16Sel %RTsel\n", pVmcb->guest.ES.u16Sel)); Log4(("guest.ES.u16Attr %#x\n", pVmcb->guest.ES.u16Attr)); Log4(("guest.ES.u32Limit %#RX32\n", pVmcb->guest.ES.u32Limit)); Log4(("guest.ES.u64Base %#RX64\n", pVmcb->guest.ES.u64Base)); Log4(("guest.FS.u16Sel %RTsel\n", pVmcb->guest.FS.u16Sel)); Log4(("guest.FS.u16Attr %#x\n", pVmcb->guest.FS.u16Attr)); Log4(("guest.FS.u32Limit %#RX32\n", pVmcb->guest.FS.u32Limit)); Log4(("guest.FS.u64Base %#RX64\n", pVmcb->guest.FS.u64Base)); Log4(("guest.GS.u16Sel %RTsel\n", pVmcb->guest.GS.u16Sel)); Log4(("guest.GS.u16Attr %#x\n", pVmcb->guest.GS.u16Attr)); Log4(("guest.GS.u32Limit %#RX32\n", pVmcb->guest.GS.u32Limit)); Log4(("guest.GS.u64Base %#RX64\n", pVmcb->guest.GS.u64Base)); Log4(("guest.GDTR.u32Limit %#RX32\n", pVmcb->guest.GDTR.u32Limit)); Log4(("guest.GDTR.u64Base %#RX64\n", pVmcb->guest.GDTR.u64Base)); Log4(("guest.LDTR.u16Sel %RTsel\n", pVmcb->guest.LDTR.u16Sel)); Log4(("guest.LDTR.u16Attr %#x\n", pVmcb->guest.LDTR.u16Attr)); Log4(("guest.LDTR.u32Limit %#RX32\n", pVmcb->guest.LDTR.u32Limit)); Log4(("guest.LDTR.u64Base %#RX64\n", pVmcb->guest.LDTR.u64Base)); Log4(("guest.IDTR.u32Limit %#RX32\n", pVmcb->guest.IDTR.u32Limit)); Log4(("guest.IDTR.u64Base %#RX64\n", pVmcb->guest.IDTR.u64Base)); Log4(("guest.TR.u16Sel %RTsel\n", pVmcb->guest.TR.u16Sel)); Log4(("guest.TR.u16Attr %#x\n", pVmcb->guest.TR.u16Attr)); Log4(("guest.TR.u32Limit %#RX32\n", pVmcb->guest.TR.u32Limit)); Log4(("guest.TR.u64Base %#RX64\n", pVmcb->guest.TR.u64Base)); Log4(("guest.u8CPL %#x\n", pVmcb->guest.u8CPL)); Log4(("guest.u64CR0 %#RX64\n", pVmcb->guest.u64CR0)); Log4(("guest.u64CR2 %#RX64\n", pVmcb->guest.u64CR2)); Log4(("guest.u64CR3 %#RX64\n", pVmcb->guest.u64CR3)); Log4(("guest.u64CR4 %#RX64\n", pVmcb->guest.u64CR4)); Log4(("guest.u64DR6 %#RX64\n", pVmcb->guest.u64DR6)); Log4(("guest.u64DR7 %#RX64\n", pVmcb->guest.u64DR7)); Log4(("guest.u64RIP %#RX64\n", pVmcb->guest.u64RIP)); Log4(("guest.u64RSP %#RX64\n", pVmcb->guest.u64RSP)); Log4(("guest.u64RAX %#RX64\n", pVmcb->guest.u64RAX)); Log4(("guest.u64RFlags %#RX64\n", pVmcb->guest.u64RFlags)); Log4(("guest.u64SysEnterCS %#RX64\n", pVmcb->guest.u64SysEnterCS)); Log4(("guest.u64SysEnterEIP %#RX64\n", pVmcb->guest.u64SysEnterEIP)); Log4(("guest.u64SysEnterESP %#RX64\n", pVmcb->guest.u64SysEnterESP)); Log4(("guest.u64EFER %#RX64\n", pVmcb->guest.u64EFER)); Log4(("guest.u64STAR %#RX64\n", pVmcb->guest.u64STAR)); Log4(("guest.u64LSTAR %#RX64\n", pVmcb->guest.u64LSTAR)); Log4(("guest.u64CSTAR %#RX64\n", pVmcb->guest.u64CSTAR)); Log4(("guest.u64SFMASK %#RX64\n", pVmcb->guest.u64SFMASK)); Log4(("guest.u64KernelGSBase %#RX64\n", pVmcb->guest.u64KernelGSBase)); Log4(("guest.u64GPAT %#RX64\n", pVmcb->guest.u64GPAT)); Log4(("guest.u64DBGCTL %#RX64\n", pVmcb->guest.u64DBGCTL)); Log4(("guest.u64BR_FROM %#RX64\n", pVmcb->guest.u64BR_FROM)); Log4(("guest.u64BR_TO %#RX64\n", pVmcb->guest.u64BR_TO)); Log4(("guest.u64LASTEXCPFROM %#RX64\n", pVmcb->guest.u64LASTEXCPFROM)); Log4(("guest.u64LASTEXCPTO %#RX64\n", pVmcb->guest.u64LASTEXCPTO)); #endif /* VBOX_STRICT */ } else Log4(("hmR0SvmReportWorldSwitchError: rcVMRun=%d\n", rcVMRun)); NOREF(pVmcb); } /** * Check per-VM and per-VCPU force flag actions that require us to go back to * ring-3 for one reason or another. * * @returns VBox status code (information status code included). * @retval VINF_SUCCESS if we don't have any actions that require going back to * ring-3. * @retval VINF_PGM_SYNC_CR3 if we have pending PGM CR3 sync. * @retval VINF_EM_PENDING_REQUEST if we have pending requests (like hardware * interrupts) * @retval VINF_PGM_POOL_FLUSH_PENDING if PGM is doing a pool flush and requires * all EMTs to be in ring-3. * @retval VINF_EM_RAW_TO_R3 if there is pending DMA requests. * @retval VINF_EM_NO_MEMORY PGM is out of memory, we need to return * to the EM loop. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmCheckForceFlags(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { Assert(VMMRZCallRing3IsEnabled(pVCpu)); /* On AMD-V we don't need to update CR3, PAE PDPES lazily. See hmR0SvmSaveGuestState(). */ Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_HM_UPDATE_CR3)); Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_HM_UPDATE_PAE_PDPES)); if ( VM_FF_IS_PENDING(pVM, !pVCpu->hm.s.fSingleInstruction ? VM_FF_HP_R0_PRE_HM_MASK : VM_FF_HP_R0_PRE_HM_STEP_MASK) || VMCPU_FF_IS_PENDING(pVCpu, !pVCpu->hm.s.fSingleInstruction ? VMCPU_FF_HP_R0_PRE_HM_MASK : VMCPU_FF_HP_R0_PRE_HM_STEP_MASK) ) { /* Pending PGM C3 sync. */ if (VMCPU_FF_IS_PENDING(pVCpu,VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL)) { int rc = PGMSyncCR3(pVCpu, pCtx->cr0, pCtx->cr3, pCtx->cr4, VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_PGM_SYNC_CR3)); if (rc != VINF_SUCCESS) { Log4(("hmR0SvmCheckForceFlags: PGMSyncCR3 forcing us back to ring-3. rc=%d\n", rc)); return rc; } } /* Pending HM-to-R3 operations (critsects, timers, EMT rendezvous etc.) */ /* -XXX- what was that about single stepping? */ if ( VM_FF_IS_PENDING(pVM, VM_FF_HM_TO_R3_MASK) || VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_HM_TO_R3_MASK)) { STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchHmToR3FF); int rc = RT_UNLIKELY(VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY)) ? VINF_EM_NO_MEMORY : VINF_EM_RAW_TO_R3; Log4(("hmR0SvmCheckForceFlags: HM_TO_R3 forcing us back to ring-3. rc=%d\n", rc)); return rc; } /* Pending VM request packets, such as hardware interrupts. */ if ( VM_FF_IS_PENDING(pVM, VM_FF_REQUEST) || VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_REQUEST)) { Log4(("hmR0SvmCheckForceFlags: Pending VM request forcing us back to ring-3\n")); return VINF_EM_PENDING_REQUEST; } /* Pending PGM pool flushes. */ if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_POOL_FLUSH_PENDING)) { Log4(("hmR0SvmCheckForceFlags: PGM pool flush pending forcing us back to ring-3\n")); return VINF_PGM_POOL_FLUSH_PENDING; } /* Pending DMA requests. */ if (VM_FF_IS_PENDING(pVM, VM_FF_PDM_DMA)) { Log4(("hmR0SvmCheckForceFlags: Pending DMA request forcing us back to ring-3\n")); return VINF_EM_RAW_TO_R3; } } return VINF_SUCCESS; } /** * Does the preparations before executing guest code in AMD-V. * * This may cause longjmps to ring-3 and may even result in rescheduling to the * recompiler. We must be cautious what we do here regarding committing * guest-state information into the VMCB assuming we assuredly execute the guest * in AMD-V. If we fall back to the recompiler after updating the VMCB and * clearing the common-state (TRPM/forceflags), we must undo those changes so * that the recompiler can (and should) use them when it resumes guest * execution. Otherwise such operations must be done when we can no longer * exit to ring-3. * * @returns VBox status code (informational status codes included). * @retval VINF_SUCCESS if we can proceed with running the guest. * @retval VINF_* scheduling changes, we have to go back to ring-3. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param pSvmTransient Pointer to the SVM transient structure. */ static int hmR0SvmPreRunGuest(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_ASSERT_PREEMPT_SAFE(); /* Check force flag actions that might require us to go back to ring-3. */ int rc = hmR0SvmCheckForceFlags(pVM, pVCpu, pCtx); if (rc != VINF_SUCCESS) return rc; if (TRPMHasTrap(pVCpu)) hmR0SvmTrpmTrapToPendingEvent(pVCpu); else if (!pVCpu->hm.s.Event.fPending) hmR0SvmEvaluatePendingEvent(pVCpu, pCtx); /* * On the oldest AMD-V systems, we may not get enough information to reinject an NMI. * Just do it in software, see @bugref{8411}. * NB: If we could continue a task switch exit we wouldn't need to do this. */ if (RT_UNLIKELY(pVCpu->hm.s.Event.fPending && (((pVCpu->hm.s.Event.u64IntInfo >> 8) & 7) == SVM_EVENT_NMI))) if (RT_UNLIKELY(!pVM->hm.s.svm.u32Features)) return VINF_EM_RAW_INJECT_TRPM_EVENT; #ifdef HMSVM_SYNC_FULL_GUEST_STATE HMCPU_CF_SET(pVCpu, HM_CHANGED_ALL_GUEST); #endif /* Load the guest bits that are not shared with the host in any way since we can longjmp or get preempted. */ rc = hmR0SvmLoadGuestState(pVM, pVCpu, pCtx); AssertRCReturn(rc, rc); STAM_COUNTER_INC(&pVCpu->hm.s.StatLoadFull); /* * If we're not intercepting TPR changes in the guest, save the guest TPR before the world-switch * so we can update it on the way back if the guest changed the TPR. */ if (pVCpu->hm.s.svm.fSyncVTpr) { if (pVM->hm.s.fTPRPatchingActive) pSvmTransient->u8GuestTpr = pCtx->msrLSTAR; else { PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pSvmTransient->u8GuestTpr = pVmcb->ctrl.IntCtrl.n.u8VTPR; } } /* * No longjmps to ring-3 from this point on!!! * Asserts() will still longjmp to ring-3 (but won't return), which is intentional, better than a kernel panic. * This also disables flushing of the R0-logger instance (if any). */ VMMRZCallRing3Disable(pVCpu); /* * We disable interrupts so that we don't miss any interrupts that would flag preemption (IPI/timers etc.) * when thread-context hooks aren't used and we've been running with preemption disabled for a while. * * We need to check for force-flags that could've possible been altered since we last checked them (e.g. * by PDMGetInterrupt() leaving the PDM critical section, see @bugref{6398}). * * We also check a couple of other force-flags as a last opportunity to get the EMT back to ring-3 before * executing guest code. */ pSvmTransient->fEFlags = ASMIntDisableFlags(); if ( VM_FF_IS_PENDING(pVM, VM_FF_EMT_RENDEZVOUS | VM_FF_TM_VIRTUAL_SYNC) || VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_HM_TO_R3_MASK)) { ASMSetFlags(pSvmTransient->fEFlags); VMMRZCallRing3Enable(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchHmToR3FF); return VINF_EM_RAW_TO_R3; } if (RTThreadPreemptIsPending(NIL_RTTHREAD)) { ASMSetFlags(pSvmTransient->fEFlags); VMMRZCallRing3Enable(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatPendingHostIrq); return VINF_EM_RAW_INTERRUPT; } /* * If we are injecting an NMI, we must set VMCPU_FF_BLOCK_NMIS only when we are going to execute * guest code for certain (no exits to ring-3). Otherwise, we could re-read the flag on re-entry into * AMD-V and conclude that NMI inhibition is active when we have not even delivered the NMI. * * With VT-x, this is handled by the Guest interruptibility information VMCS field which will set the * VMCS field after actually delivering the NMI which we read on VM-exit to determine the state. */ if (pVCpu->hm.s.Event.fPending) { SVMEVENT Event; Event.u = pVCpu->hm.s.Event.u64IntInfo; if ( Event.n.u1Valid && Event.n.u3Type == SVM_EVENT_NMI && Event.n.u8Vector == X86_XCPT_NMI && !VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_BLOCK_NMIS)) { VMCPU_FF_SET(pVCpu, VMCPU_FF_BLOCK_NMIS); } } return VINF_SUCCESS; } /** * Prepares to run guest code in AMD-V and we've committed to doing so. This * means there is no backing out to ring-3 or anywhere else at this * point. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param pSvmTransient Pointer to the SVM transient structure. * * @remarks Called with preemption disabled. * @remarks No-long-jump zone!!! */ static void hmR0SvmPreRunGuestCommitted(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { Assert(!VMMRZCallRing3IsEnabled(pVCpu)); Assert(VMMR0IsLogFlushDisabled(pVCpu)); Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD)); VMCPU_ASSERT_STATE(pVCpu, VMCPUSTATE_STARTED_HM); VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED_EXEC); /* Indicate the start of guest execution. */ hmR0SvmInjectPendingEvent(pVCpu, pCtx); if ( pVCpu->hm.s.fPreloadGuestFpu && !CPUMIsGuestFPUStateActive(pVCpu)) { CPUMR0LoadGuestFPU(pVM, pVCpu); /* (Ignore rc, no need to set HM_CHANGED_HOST_CONTEXT for SVM.) */ HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR0); } /* Load the state shared between host and guest (FPU, debug). */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; if (HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_HOST_GUEST_SHARED_STATE)) hmR0SvmLoadSharedState(pVCpu, pVmcb, pCtx); HMCPU_CF_CLEAR(pVCpu, HM_CHANGED_HOST_CONTEXT); /* Preemption might set this, nothing to do on AMD-V. */ AssertMsg(!HMCPU_CF_VALUE(pVCpu), ("fContextUseFlags=%#RX32\n", HMCPU_CF_VALUE(pVCpu))); /* Setup TSC offsetting. */ RTCPUID idCurrentCpu = HMR0GetCurrentCpu()->idCpu; if ( pSvmTransient->fUpdateTscOffsetting || idCurrentCpu != pVCpu->hm.s.idLastCpu) { hmR0SvmUpdateTscOffsetting(pVM, pVCpu); pSvmTransient->fUpdateTscOffsetting = false; } /* If we've migrating CPUs, mark the VMCB Clean bits as dirty. */ if (idCurrentCpu != pVCpu->hm.s.idLastCpu) pVmcb->ctrl.u64VmcbCleanBits = 0; /* Store status of the shared guest-host state at the time of VMRUN. */ #if HC_ARCH_BITS == 32 && defined(VBOX_WITH_64_BITS_GUESTS) if (CPUMIsGuestInLongModeEx(pCtx)) { pSvmTransient->fWasGuestDebugStateActive = CPUMIsGuestDebugStateActivePending(pVCpu); pSvmTransient->fWasHyperDebugStateActive = CPUMIsHyperDebugStateActivePending(pVCpu); } else #endif { pSvmTransient->fWasGuestDebugStateActive = CPUMIsGuestDebugStateActive(pVCpu); pSvmTransient->fWasHyperDebugStateActive = CPUMIsHyperDebugStateActive(pVCpu); } pSvmTransient->fWasGuestFPUStateActive = CPUMIsGuestFPUStateActive(pVCpu); /* Flush the appropriate tagged-TLB entries. */ ASMAtomicWriteBool(&pVCpu->hm.s.fCheckedTLBFlush, true); /* Used for TLB flushing, set this across the world switch. */ hmR0SvmFlushTaggedTlb(pVCpu); Assert(HMR0GetCurrentCpu()->idCpu == pVCpu->hm.s.idLastCpu); STAM_PROFILE_ADV_STOP_START(&pVCpu->hm.s.StatEntry, &pVCpu->hm.s.StatInGC, x); TMNotifyStartOfExecution(pVCpu); /* Finally, notify TM to resume its clocks as we're about to start executing. */ /* * Save the current Host TSC_AUX and write the guest TSC_AUX to the host, so that * RDTSCPs (that don't cause exits) reads the guest MSR. See @bugref{3324}. * * This should be done -after- any RDTSCPs for obtaining the host timestamp (TM, STAM etc). */ if ( (pVM->hm.s.cpuid.u32AMDFeatureEDX & X86_CPUID_EXT_FEATURE_EDX_RDTSCP) && !(pVmcb->ctrl.u32InterceptCtrl2 & SVM_CTRL2_INTERCEPT_RDTSCP)) { hmR0SvmSetMsrPermission(pVCpu, MSR_K8_TSC_AUX, SVMMSREXIT_PASSTHRU_READ, SVMMSREXIT_PASSTHRU_WRITE); pVCpu->hm.s.u64HostTscAux = ASMRdMsr(MSR_K8_TSC_AUX); uint64_t u64GuestTscAux = CPUMR0GetGuestTscAux(pVCpu); if (u64GuestTscAux != pVCpu->hm.s.u64HostTscAux) ASMWrMsr(MSR_K8_TSC_AUX, u64GuestTscAux); pSvmTransient->fRestoreTscAuxMsr = true; } else { hmR0SvmSetMsrPermission(pVCpu, MSR_K8_TSC_AUX, SVMMSREXIT_INTERCEPT_READ, SVMMSREXIT_INTERCEPT_WRITE); pSvmTransient->fRestoreTscAuxMsr = false; } /* If VMCB Clean bits isn't supported by the CPU, simply mark all state-bits as dirty, indicating (re)load-from-VMCB. */ if (!(pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_VMCB_CLEAN)) pVmcb->ctrl.u64VmcbCleanBits = 0; } /** * Wrapper for running the guest code in AMD-V. * * @returns VBox strict status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * * @remarks No-long-jump zone!!! */ DECLINLINE(int) hmR0SvmRunGuest(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { /* * 64-bit Windows uses XMM registers in the kernel as the Microsoft compiler expresses floating-point operations * using SSE instructions. Some XMM registers (XMM6-XMM15) are callee-saved and thus the need for this XMM wrapper. * Refer MSDN docs. "Configuring Programs for 64-bit / x64 Software Conventions / Register Usage" for details. */ #ifdef VBOX_WITH_KERNEL_USING_XMM return HMR0SVMRunWrapXMM(pVCpu->hm.s.svm.HCPhysVmcbHost, pVCpu->hm.s.svm.HCPhysVmcb, pCtx, pVM, pVCpu, pVCpu->hm.s.svm.pfnVMRun); #else return pVCpu->hm.s.svm.pfnVMRun(pVCpu->hm.s.svm.HCPhysVmcbHost, pVCpu->hm.s.svm.HCPhysVmcb, pCtx, pVM, pVCpu); #endif } /** * Performs some essential restoration of state after running guest code in * AMD-V. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pMixedCtx Pointer to the guest-CPU context. The data maybe * out-of-sync. Make sure to update the required fields * before using them. * @param pSvmTransient Pointer to the SVM transient structure. * @param rcVMRun Return code of VMRUN. * * @remarks Called with interrupts disabled. * @remarks No-long-jump zone!!! This function will however re-enable longjmps * unconditionally when it is safe to do so. */ static void hmR0SvmPostRunGuest(PVM pVM, PVMCPU pVCpu, PCPUMCTX pMixedCtx, PSVMTRANSIENT pSvmTransient, int rcVMRun) { Assert(!VMMRZCallRing3IsEnabled(pVCpu)); ASMAtomicWriteBool(&pVCpu->hm.s.fCheckedTLBFlush, false); /* See HMInvalidatePageOnAllVCpus(): used for TLB flushing. */ ASMAtomicIncU32(&pVCpu->hm.s.cWorldSwitchExits); /* Initialized in vmR3CreateUVM(): used for EMT poking. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pVmcb->ctrl.u64VmcbCleanBits = HMSVM_VMCB_CLEAN_ALL; /* Mark the VMCB-state cache as unmodified by VMM. */ /* TSC read must be done early for maximum accuracy. */ if (!(pVmcb->ctrl.u32InterceptCtrl1 & SVM_CTRL1_INTERCEPT_RDTSC)) TMCpuTickSetLastSeen(pVCpu, ASMReadTSC() + pVmcb->ctrl.u64TSCOffset); if (pSvmTransient->fRestoreTscAuxMsr) { uint64_t u64GuestTscAuxMsr = ASMRdMsr(MSR_K8_TSC_AUX); CPUMR0SetGuestTscAux(pVCpu, u64GuestTscAuxMsr); if (u64GuestTscAuxMsr != pVCpu->hm.s.u64HostTscAux) ASMWrMsr(MSR_K8_TSC_AUX, pVCpu->hm.s.u64HostTscAux); } STAM_PROFILE_ADV_STOP_START(&pVCpu->hm.s.StatInGC, &pVCpu->hm.s.StatExit1, x); TMNotifyEndOfExecution(pVCpu); /* Notify TM that the guest is no longer running. */ VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED_HM); Assert(!(ASMGetFlags() & X86_EFL_IF)); ASMSetFlags(pSvmTransient->fEFlags); /* Enable interrupts. */ VMMRZCallRing3Enable(pVCpu); /* It is now safe to do longjmps to ring-3!!! */ /* If VMRUN failed, we can bail out early. This does -not- cover SVM_EXIT_INVALID. */ if (RT_UNLIKELY(rcVMRun != VINF_SUCCESS)) { Log4(("VMRUN failure: rcVMRun=%Rrc\n", rcVMRun)); return; } pSvmTransient->u64ExitCode = pVmcb->ctrl.u64ExitCode; /* Save the #VMEXIT reason. */ HMCPU_EXIT_HISTORY_ADD(pVCpu, pVmcb->ctrl.u64ExitCode); /* Update the #VMEXIT history array. */ pSvmTransient->fVectoringDoublePF = false; /* Vectoring double page-fault needs to be determined later. */ pSvmTransient->fVectoringPF = false; /* Vectoring page-fault needs to be determined later. */ hmR0SvmSaveGuestState(pVCpu, pMixedCtx); /* Save the guest state from the VMCB to the guest-CPU context. */ if (RT_LIKELY(pSvmTransient->u64ExitCode != (uint64_t)SVM_EXIT_INVALID)) { if (pVCpu->hm.s.svm.fSyncVTpr) { /* TPR patching (for 32-bit guests) uses LSTAR MSR for holding the TPR value, otherwise uses the VTPR. */ if ( pVM->hm.s.fTPRPatchingActive && (pMixedCtx->msrLSTAR & 0xff) != pSvmTransient->u8GuestTpr) { int rc = PDMApicSetTPR(pVCpu, pMixedCtx->msrLSTAR & 0xff); AssertRC(rc); HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); } else if (pSvmTransient->u8GuestTpr != pVmcb->ctrl.IntCtrl.n.u8VTPR) { int rc = PDMApicSetTPR(pVCpu, pVmcb->ctrl.IntCtrl.n.u8VTPR << 4); AssertRC(rc); HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); } } } } /** * Runs the guest code using AMD-V. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmRunGuestCodeNormal(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { SVMTRANSIENT SvmTransient; SvmTransient.fUpdateTscOffsetting = true; uint32_t cLoops = 0; int rc = VERR_INTERNAL_ERROR_5; for (;; cLoops++) { Assert(!HMR0SuspendPending()); HMSVM_ASSERT_CPU_SAFE(); /* Preparatory work for running guest code, this may force us to return to ring-3. This bugger disables interrupts on VINF_SUCCESS! */ STAM_PROFILE_ADV_START(&pVCpu->hm.s.StatEntry, x); rc = hmR0SvmPreRunGuest(pVM, pVCpu, pCtx, &SvmTransient); if (rc != VINF_SUCCESS) break; /* * No longjmps to ring-3 from this point on!!! * Asserts() will still longjmp to ring-3 (but won't return), which is intentional, better than a kernel panic. * This also disables flushing of the R0-logger instance (if any). */ hmR0SvmPreRunGuestCommitted(pVM, pVCpu, pCtx, &SvmTransient); rc = hmR0SvmRunGuest(pVM, pVCpu, pCtx); /* Restore any residual host-state and save any bits shared between host and guest into the guest-CPU state. Re-enables interrupts! */ hmR0SvmPostRunGuest(pVM, pVCpu, pCtx, &SvmTransient, rc); if (RT_UNLIKELY( rc != VINF_SUCCESS /* Check for VMRUN errors. */ || SvmTransient.u64ExitCode == (uint64_t)SVM_EXIT_INVALID)) /* Check for invalid guest-state errors. */ { if (rc == VINF_SUCCESS) rc = VERR_SVM_INVALID_GUEST_STATE; STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatExit1, x); hmR0SvmReportWorldSwitchError(pVM, pVCpu, rc, pCtx); break; } /* Handle the #VMEXIT. */ HMSVM_EXITCODE_STAM_COUNTER_INC(SvmTransient.u64ExitCode); STAM_PROFILE_ADV_STOP_START(&pVCpu->hm.s.StatExit1, &pVCpu->hm.s.StatExit2, x); VBOXVMM_R0_HMSVM_VMEXIT(pVCpu, pCtx, SvmTransient.u64ExitCode, (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb); rc = hmR0SvmHandleExit(pVCpu, pCtx, &SvmTransient); STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatExit2, x); if (rc != VINF_SUCCESS) break; if (cLoops > pVM->hm.s.cMaxResumeLoops) { STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchMaxResumeLoops); rc = VINF_EM_RAW_INTERRUPT; break; } } STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatEntry, x); return rc; } /** * Runs the guest code using AMD-V in single step mode. * * @returns VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmRunGuestCodeStep(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { SVMTRANSIENT SvmTransient; SvmTransient.fUpdateTscOffsetting = true; uint32_t cLoops = 0; int rc = VERR_INTERNAL_ERROR_5; uint16_t uCsStart = pCtx->cs.Sel; uint64_t uRipStart = pCtx->rip; for (;; cLoops++) { Assert(!HMR0SuspendPending()); AssertMsg(pVCpu->hm.s.idEnteredCpu == RTMpCpuId(), ("Illegal migration! Entered on CPU %u Current %u cLoops=%u\n", (unsigned)pVCpu->hm.s.idEnteredCpu, (unsigned)RTMpCpuId(), cLoops)); /* Preparatory work for running guest code, this may force us to return to ring-3. This bugger disables interrupts on VINF_SUCCESS! */ STAM_PROFILE_ADV_START(&pVCpu->hm.s.StatEntry, x); rc = hmR0SvmPreRunGuest(pVM, pVCpu, pCtx, &SvmTransient); if (rc != VINF_SUCCESS) break; /* * No longjmps to ring-3 from this point on!!! * Asserts() will still longjmp to ring-3 (but won't return), which is intentional, better than a kernel panic. * This also disables flushing of the R0-logger instance (if any). */ VMMRZCallRing3Disable(pVCpu); VMMRZCallRing3RemoveNotification(pVCpu); hmR0SvmPreRunGuestCommitted(pVM, pVCpu, pCtx, &SvmTransient); rc = hmR0SvmRunGuest(pVM, pVCpu, pCtx); /* * Restore any residual host-state and save any bits shared between host and guest into the guest-CPU state. * This will also re-enable longjmps to ring-3 when it has reached a safe point!!! */ hmR0SvmPostRunGuest(pVM, pVCpu, pCtx, &SvmTransient, rc); if (RT_UNLIKELY( rc != VINF_SUCCESS /* Check for VMRUN errors. */ || SvmTransient.u64ExitCode == (uint64_t)SVM_EXIT_INVALID)) /* Check for invalid guest-state errors. */ { if (rc == VINF_SUCCESS) rc = VERR_SVM_INVALID_GUEST_STATE; STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatExit1, x); hmR0SvmReportWorldSwitchError(pVM, pVCpu, rc, pCtx); return rc; } /* Handle the #VMEXIT. */ HMSVM_EXITCODE_STAM_COUNTER_INC(SvmTransient.u64ExitCode); STAM_PROFILE_ADV_STOP_START(&pVCpu->hm.s.StatExit1, &pVCpu->hm.s.StatExit2, x); VBOXVMM_R0_HMSVM_VMEXIT(pVCpu, pCtx, SvmTransient.u64ExitCode, (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb); rc = hmR0SvmHandleExit(pVCpu, pCtx, &SvmTransient); STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatExit2, x); if (rc != VINF_SUCCESS) break; if (cLoops > pVM->hm.s.cMaxResumeLoops) { STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchMaxResumeLoops); rc = VINF_EM_RAW_INTERRUPT; break; } /* * Did the RIP change, if so, consider it a single step. * Otherwise, make sure one of the TFs gets set. */ if ( pCtx->rip != uRipStart || pCtx->cs.Sel != uCsStart) { rc = VINF_EM_DBG_STEPPED; break; } pVCpu->hm.s.fContextUseFlags |= HM_CHANGED_GUEST_DEBUG; } /* * Clear the X86_EFL_TF if necessary. */ if (pVCpu->hm.s.fClearTrapFlag) { pVCpu->hm.s.fClearTrapFlag = false; pCtx->eflags.Bits.u1TF = 0; } STAM_PROFILE_ADV_STOP(&pVCpu->hm.s.StatEntry, x); return rc; } /** * Runs the guest code using AMD-V. * * @returns Strict VBox status code. * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ VMMR0DECL(VBOXSTRICTRC) SVMR0RunGuestCode(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { Assert(VMMRZCallRing3IsEnabled(pVCpu)); HMSVM_ASSERT_PREEMPT_SAFE(); VMMRZCallRing3SetNotification(pVCpu, hmR0SvmCallRing3Callback, pCtx); int rc; if (!pVCpu->hm.s.fSingleInstruction) rc = hmR0SvmRunGuestCodeNormal(pVM, pVCpu, pCtx); else rc = hmR0SvmRunGuestCodeStep(pVM, pVCpu, pCtx); if (rc == VERR_EM_INTERPRETER) rc = VINF_EM_RAW_EMULATE_INSTR; else if (rc == VINF_EM_RESET) rc = VINF_EM_TRIPLE_FAULT; /* Prepare to return to ring-3. This will remove longjmp notifications. */ hmR0SvmExitToRing3(pVM, pVCpu, pCtx, rc); Assert(!VMMRZCallRing3IsNotificationSet(pVCpu)); return rc; } /** * Handles a \#VMEXIT (for all EXITCODE values except SVM_EXIT_INVALID). * * @returns VBox status code (informational status codes included). * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param pSvmTransient Pointer to the SVM transient structure. */ DECLINLINE(int) hmR0SvmHandleExit(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { Assert(pSvmTransient->u64ExitCode != (uint64_t)SVM_EXIT_INVALID); Assert(pSvmTransient->u64ExitCode <= SVM_EXIT_MAX); /* * The ordering of the case labels is based on most-frequently-occurring #VMEXITs for most guests under * normal workloads (for some definition of "normal"). */ uint32_t u32ExitCode = pSvmTransient->u64ExitCode; switch (pSvmTransient->u64ExitCode) { case SVM_EXIT_NPF: return hmR0SvmExitNestedPF(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_IOIO: return hmR0SvmExitIOInstr(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_RDTSC: return hmR0SvmExitRdtsc(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_RDTSCP: return hmR0SvmExitRdtscp(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_CPUID: return hmR0SvmExitCpuid(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_E: /* X86_XCPT_PF */ return hmR0SvmExitXcptPF(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_7: /* X86_XCPT_NM */ return hmR0SvmExitXcptNM(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_6: /* X86_XCPT_UD */ return hmR0SvmExitXcptUD(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_10: /* X86_XCPT_MF */ return hmR0SvmExitXcptMF(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_1: /* X86_XCPT_DB */ return hmR0SvmExitXcptDB(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_EXCEPTION_11: /* X86_XCPT_AC */ return hmR0SvmExitXcptAC(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_MONITOR: return hmR0SvmExitMonitor(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_MWAIT: return hmR0SvmExitMwait(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_HLT: return hmR0SvmExitHlt(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_READ_CR0: case SVM_EXIT_READ_CR3: case SVM_EXIT_READ_CR4: return hmR0SvmExitReadCRx(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_WRITE_CR0: case SVM_EXIT_WRITE_CR3: case SVM_EXIT_WRITE_CR4: case SVM_EXIT_WRITE_CR8: return hmR0SvmExitWriteCRx(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_PAUSE: return hmR0SvmExitPause(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_VMMCALL: return hmR0SvmExitVmmCall(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_VINTR: return hmR0SvmExitVIntr(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_INTR: case SVM_EXIT_FERR_FREEZE: case SVM_EXIT_NMI: return hmR0SvmExitIntr(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_MSR: return hmR0SvmExitMsr(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_INVLPG: return hmR0SvmExitInvlpg(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_WBINVD: return hmR0SvmExitWbinvd(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_INVD: return hmR0SvmExitInvd(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_RDPMC: return hmR0SvmExitRdpmc(pVCpu, pCtx, pSvmTransient); default: { switch (pSvmTransient->u64ExitCode) { case SVM_EXIT_READ_DR0: case SVM_EXIT_READ_DR1: case SVM_EXIT_READ_DR2: case SVM_EXIT_READ_DR3: case SVM_EXIT_READ_DR6: case SVM_EXIT_READ_DR7: case SVM_EXIT_READ_DR8: case SVM_EXIT_READ_DR9: case SVM_EXIT_READ_DR10: case SVM_EXIT_READ_DR11: case SVM_EXIT_READ_DR12: case SVM_EXIT_READ_DR13: case SVM_EXIT_READ_DR14: case SVM_EXIT_READ_DR15: return hmR0SvmExitReadDRx(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_WRITE_DR0: case SVM_EXIT_WRITE_DR1: case SVM_EXIT_WRITE_DR2: case SVM_EXIT_WRITE_DR3: case SVM_EXIT_WRITE_DR6: case SVM_EXIT_WRITE_DR7: case SVM_EXIT_WRITE_DR8: case SVM_EXIT_WRITE_DR9: case SVM_EXIT_WRITE_DR10: case SVM_EXIT_WRITE_DR11: case SVM_EXIT_WRITE_DR12: case SVM_EXIT_WRITE_DR13: case SVM_EXIT_WRITE_DR14: case SVM_EXIT_WRITE_DR15: return hmR0SvmExitWriteDRx(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_XSETBV: return hmR0SvmExitXsetbv(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_TASK_SWITCH: return hmR0SvmExitTaskSwitch(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_IRET: return hmR0SvmExitIret(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_SHUTDOWN: return hmR0SvmExitShutdown(pVCpu, pCtx, pSvmTransient); case SVM_EXIT_SMI: case SVM_EXIT_INIT: { /* * We don't intercept NMIs. As for INIT signals, it really shouldn't ever happen here. If it ever does, * we want to know about it so log the exit code and bail. */ AssertMsgFailed(("hmR0SvmHandleExit: Unexpected exit %#RX32\n", (uint32_t)pSvmTransient->u64ExitCode)); pVCpu->hm.s.u32HMError = (uint32_t)pSvmTransient->u64ExitCode; return VERR_SVM_UNEXPECTED_EXIT; } case SVM_EXIT_INVLPGA: case SVM_EXIT_RSM: case SVM_EXIT_VMRUN: case SVM_EXIT_VMLOAD: case SVM_EXIT_VMSAVE: case SVM_EXIT_STGI: case SVM_EXIT_CLGI: case SVM_EXIT_SKINIT: return hmR0SvmExitSetPendingXcptUD(pVCpu, pCtx, pSvmTransient); #ifdef HMSVM_ALWAYS_TRAP_ALL_XCPTS case SVM_EXIT_EXCEPTION_0: /* X86_XCPT_DE */ /* SVM_EXIT_EXCEPTION_1: */ /* X86_XCPT_DB - Handled above. */ case SVM_EXIT_EXCEPTION_2: /* X86_XCPT_NMI */ case SVM_EXIT_EXCEPTION_3: /* X86_XCPT_BP */ case SVM_EXIT_EXCEPTION_4: /* X86_XCPT_OF */ case SVM_EXIT_EXCEPTION_5: /* X86_XCPT_BR */ /* case SVM_EXIT_EXCEPTION_6: */ /* X86_XCPT_UD - Handled above. */ /* SVM_EXIT_EXCEPTION_7: */ /* X86_XCPT_NM - Handled above. */ case SVM_EXIT_EXCEPTION_8: /* X86_XCPT_DF */ case SVM_EXIT_EXCEPTION_9: /* X86_XCPT_CO_SEG_OVERRUN */ case SVM_EXIT_EXCEPTION_A: /* X86_XCPT_TS */ case SVM_EXIT_EXCEPTION_B: /* X86_XCPT_NP */ case SVM_EXIT_EXCEPTION_C: /* X86_XCPT_SS */ case SVM_EXIT_EXCEPTION_D: /* X86_XCPT_GP */ /* SVM_EXIT_EXCEPTION_E: */ /* X86_XCPT_PF - Handled above. */ /* SVM_EXIT_EXCEPTION_10: */ /* X86_XCPT_MF - Handled above. */ /* SVM_EXIT_EXCEPTION_11: */ /* X86_XCPT_AC - Handled above. */ case SVM_EXIT_EXCEPTION_12: /* X86_XCPT_MC */ case SVM_EXIT_EXCEPTION_13: /* X86_XCPT_XF */ case SVM_EXIT_EXCEPTION_F: /* Reserved */ case SVM_EXIT_EXCEPTION_14: case SVM_EXIT_EXCEPTION_15: case SVM_EXIT_EXCEPTION_16: case SVM_EXIT_EXCEPTION_17: case SVM_EXIT_EXCEPTION_18: case SVM_EXIT_EXCEPTION_19: case SVM_EXIT_EXCEPTION_1A: case SVM_EXIT_EXCEPTION_1B: case SVM_EXIT_EXCEPTION_1C: case SVM_EXIT_EXCEPTION_1D: case SVM_EXIT_EXCEPTION_1E: case SVM_EXIT_EXCEPTION_1F: { PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = pSvmTransient->u64ExitCode - SVM_EXIT_EXCEPTION_0; switch (Event.n.u8Vector) { case X86_XCPT_DE: STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestDE); break; case X86_XCPT_BP: /** Saves the wrong EIP on the stack (pointing to the int3) instead of the * next instruction. */ /** @todo Investigate this later. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestBP); break; case X86_XCPT_NP: Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = pVmcb->ctrl.u64ExitInfo1; STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestNP); break; case X86_XCPT_SS: Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = pVmcb->ctrl.u64ExitInfo1; STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestSS); break; case X86_XCPT_GP: Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = pVmcb->ctrl.u64ExitInfo1; STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestGP); break; default: AssertMsgFailed(("hmR0SvmHandleExit: Unexpected exit caused by exception %#x\n", Event.n.u8Vector)); pVCpu->hm.s.u32HMError = Event.n.u8Vector; return VERR_SVM_UNEXPECTED_XCPT_EXIT; } Log4(("#Xcpt: Vector=%#x at CS:RIP=%04x:%RGv\n", Event.n.u8Vector, pCtx->cs.Sel, (RTGCPTR)pCtx->rip)); hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); return VINF_SUCCESS; } #endif /* HMSVM_ALWAYS_TRAP_ALL_XCPTS */ default: { AssertMsgFailed(("hmR0SvmHandleExit: Unknown exit code %#x\n", u32ExitCode)); pVCpu->hm.s.u32HMError = u32ExitCode; return VERR_SVM_UNKNOWN_EXIT; } } } } /* not reached */ } #ifdef DEBUG /* Is there some generic IPRT define for this that are not in Runtime/internal/\* ?? */ # define HMSVM_ASSERT_PREEMPT_CPUID_VAR() \ RTCPUID const idAssertCpu = RTThreadPreemptIsEnabled(NIL_RTTHREAD) ? NIL_RTCPUID : RTMpCpuId() # define HMSVM_ASSERT_PREEMPT_CPUID() \ do \ { \ RTCPUID const idAssertCpuNow = RTThreadPreemptIsEnabled(NIL_RTTHREAD) ? NIL_RTCPUID : RTMpCpuId(); \ AssertMsg(idAssertCpu == idAssertCpuNow, ("SVM %#x, %#x\n", idAssertCpu, idAssertCpuNow)); \ } while (0) # define HMSVM_VALIDATE_EXIT_HANDLER_PARAMS() \ do { \ AssertPtr(pVCpu); \ AssertPtr(pCtx); \ AssertPtr(pSvmTransient); \ Assert(ASMIntAreEnabled()); \ HMSVM_ASSERT_PREEMPT_SAFE(); \ HMSVM_ASSERT_PREEMPT_CPUID_VAR(); \ Log4Func(("vcpu[%u] -v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-v-\n", (uint32_t)pVCpu->idCpu)); \ HMSVM_ASSERT_PREEMPT_SAFE(); \ if (VMMR0IsLogFlushDisabled(pVCpu)) \ HMSVM_ASSERT_PREEMPT_CPUID(); \ } while (0) #else /* Release builds */ # define HMSVM_VALIDATE_EXIT_HANDLER_PARAMS() do { NOREF(pVCpu); NOREF(pCtx); NOREF(pSvmTransient); } while (0) #endif /** * Worker for hmR0SvmInterpretInvlpg(). * * @return VBox status code. * @param pVCpu The cross context virtual CPU structure. * @param pCpu Pointer to the disassembler state. * @param pCtx The guest CPU context. */ static int hmR0SvmInterpretInvlPgEx(PVMCPU pVCpu, PDISCPUSTATE pCpu, PCPUMCTX pCtx) { DISQPVPARAMVAL Param1; RTGCPTR GCPtrPage; int rc = DISQueryParamVal(CPUMCTX2CORE(pCtx), pCpu, &pCpu->Param1, &Param1, DISQPVWHICH_SRC); if (RT_FAILURE(rc)) return VERR_EM_INTERPRETER; if ( Param1.type == DISQPV_TYPE_IMMEDIATE || Param1.type == DISQPV_TYPE_ADDRESS) { if (!(Param1.flags & (DISQPV_FLAG_32 | DISQPV_FLAG_64))) return VERR_EM_INTERPRETER; GCPtrPage = Param1.val.val64; VBOXSTRICTRC rc2 = EMInterpretInvlpg(pVCpu->CTX_SUFF(pVM), pVCpu, CPUMCTX2CORE(pCtx), GCPtrPage); rc = VBOXSTRICTRC_VAL(rc2); } else { Log4(("hmR0SvmInterpretInvlPgEx invalid parameter type %#x\n", Param1.type)); rc = VERR_EM_INTERPRETER; } return rc; } /** * Interprets INVLPG. * * @returns VBox status code. * @retval VINF_* Scheduling instructions. * @retval VERR_EM_INTERPRETER Something we can't cope with. * @retval VERR_* Fatal errors. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx The guest CPU context. * * @remarks Updates the RIP if the instruction was executed successfully. */ static int hmR0SvmInterpretInvlpg(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { /* Only allow 32 & 64 bit code. */ if (CPUMGetGuestCodeBits(pVCpu) != 16) { PDISSTATE pDis = &pVCpu->hm.s.DisState; int rc = EMInterpretDisasCurrent(pVM, pVCpu, pDis, NULL /* pcbInstr */); if ( RT_SUCCESS(rc) && pDis->pCurInstr->uOpcode == OP_INVLPG) { rc = hmR0SvmInterpretInvlPgEx(pVCpu, pDis, pCtx); if (RT_SUCCESS(rc)) pCtx->rip += pDis->cbInstr; return rc; } else Log4(("hmR0SvmInterpretInvlpg: EMInterpretDisasCurrent returned %Rrc uOpCode=%#x\n", rc, pDis->pCurInstr->uOpcode)); } return VERR_EM_INTERPRETER; } /** * Sets an invalid-opcode (\#UD) exception as pending-for-injection into the VM. * * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(void) hmR0SvmSetPendingXcptUD(PVMCPU pVCpu) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_UD; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } /** * Sets a debug (\#DB) exception as pending-for-injection into the VM. * * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(void) hmR0SvmSetPendingXcptDB(PVMCPU pVCpu) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_DB; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } /** * Sets a page fault (\#PF) exception as pending-for-injection into the VM. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param u32ErrCode The error-code for the page-fault. * @param uFaultAddress The page fault address (CR2). * * @remarks This updates the guest CR2 with @a uFaultAddress! */ DECLINLINE(void) hmR0SvmSetPendingXcptPF(PVMCPU pVCpu, PCPUMCTX pCtx, uint32_t u32ErrCode, RTGCUINTPTR uFaultAddress) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_PF; Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = u32ErrCode; /* Update CR2 of the guest. */ if (pCtx->cr2 != uFaultAddress) { pCtx->cr2 = uFaultAddress; HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR2); } hmR0SvmSetPendingEvent(pVCpu, &Event, uFaultAddress); } /** * Sets a device-not-available (\#NM) exception as pending-for-injection into * the VM. * * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(void) hmR0SvmSetPendingXcptNM(PVMCPU pVCpu) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_NM; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } /** * Sets a math-fault (\#MF) exception as pending-for-injection into the VM. * * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(void) hmR0SvmSetPendingXcptMF(PVMCPU pVCpu) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_MF; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } /** * Sets a double fault (\#DF) exception as pending-for-injection into the VM. * * @param pVCpu The cross context virtual CPU structure. */ DECLINLINE(void) hmR0SvmSetPendingXcptDF(PVMCPU pVCpu) { SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_DF; Event.n.u1ErrorCodeValid = 1; Event.n.u32ErrorCode = 0; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); } /** * Emulates a simple MOV TPR (CR8) instruction, used for TPR patching on 32-bit * guests. This simply looks up the patch record at EIP and does the required. * * This VMMCALL is used a fallback mechanism when mov to/from cr8 isn't exactly * like how we want it to be (e.g. not followed by shr 4 as is usually done for * TPR). See hmR3ReplaceTprInstr() for the details. * * @returns VBox status code. * @retval VINF_SUCCESS if the access was handled successfully. * @retval VERR_NOT_FOUND if no patch record for this RIP could be found. * @retval VERR_SVM_UNEXPECTED_PATCH_TYPE if the found patch type is invalid. * * @param pVM The cross context VM structure. * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. */ static int hmR0SvmEmulateMovTpr(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx) { Log4(("Emulated VMMCall TPR access replacement at RIP=%RGv\n", pCtx->rip)); /* * We do this in a loop as we increment the RIP after a successful emulation * and the new RIP may be a patched instruction which needs emulation as well. */ bool fPatchFound = false; for (;;) { bool fPending; uint8_t u8Tpr; PHMTPRPATCH pPatch = (PHMTPRPATCH)RTAvloU32Get(&pVM->hm.s.PatchTree, (AVLOU32KEY)pCtx->eip); if (!pPatch) break; fPatchFound = true; switch (pPatch->enmType) { case HMTPRINSTR_READ: { int rc = PDMApicGetTPR(pVCpu, &u8Tpr, &fPending, NULL /* pu8PendingIrq */); AssertRC(rc); rc = DISWriteReg32(CPUMCTX2CORE(pCtx), pPatch->uDstOperand, u8Tpr); AssertRC(rc); pCtx->rip += pPatch->cbOp; break; } case HMTPRINSTR_WRITE_REG: case HMTPRINSTR_WRITE_IMM: { if (pPatch->enmType == HMTPRINSTR_WRITE_REG) { uint32_t u32Val; int rc = DISFetchReg32(CPUMCTX2CORE(pCtx), pPatch->uSrcOperand, &u32Val); AssertRC(rc); u8Tpr = u32Val; } else u8Tpr = (uint8_t)pPatch->uSrcOperand; int rc2 = PDMApicSetTPR(pVCpu, u8Tpr); AssertRC(rc2); HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); pCtx->rip += pPatch->cbOp; break; } default: AssertMsgFailed(("Unexpected patch type %d\n", pPatch->enmType)); pVCpu->hm.s.u32HMError = pPatch->enmType; return VERR_SVM_UNEXPECTED_PATCH_TYPE; } } if (fPatchFound) return VINF_SUCCESS; return VERR_NOT_FOUND; } /** * Determines if an exception is a contributory exception. * * Contributory exceptions are ones which can cause double-faults unless the * original exception was a benign exception. Page-fault is intentionally not * included here as it's a conditional contributory exception. * * @returns true if the exception is contributory, false otherwise. * @param uVector The exception vector. */ DECLINLINE(bool) hmR0SvmIsContributoryXcpt(const uint32_t uVector) { switch (uVector) { case X86_XCPT_GP: case X86_XCPT_SS: case X86_XCPT_NP: case X86_XCPT_TS: case X86_XCPT_DE: return true; default: break; } return false; } /** * Handle a condition that occurred while delivering an event through the guest * IDT. * * @returns VBox status code (informational error codes included). * @retval VINF_SUCCESS if we should continue handling the \#VMEXIT. * @retval VINF_HM_DOUBLE_FAULT if a \#DF condition was detected and we ought to * continue execution of the guest which will delivery the \#DF. * @retval VINF_EM_RESET if we detected a triple-fault condition. * @retval VERR_EM_GUEST_CPU_HANG if we detected a guest CPU hang. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param pSvmTransient Pointer to the SVM transient structure. * * @remarks No-long-jump zone!!! */ static int hmR0SvmCheckExitDueToEventDelivery(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { int rc = VINF_SUCCESS; PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; Log4(("EXITINTINFO: Pending vectoring event %#RX64 Valid=%RTbool ErrValid=%RTbool Err=%#RX32 Type=%u Vector=%u\n", pVmcb->ctrl.ExitIntInfo.u, !!pVmcb->ctrl.ExitIntInfo.n.u1Valid, !!pVmcb->ctrl.ExitIntInfo.n.u1ErrorCodeValid, pVmcb->ctrl.ExitIntInfo.n.u32ErrorCode, pVmcb->ctrl.ExitIntInfo.n.u3Type, pVmcb->ctrl.ExitIntInfo.n.u8Vector)); /* See AMD spec. 15.7.3 "EXITINFO Pseudo-Code". The EXITINTINFO (if valid) contains the prior exception (IDT vector) * that was trying to be delivered to the guest which caused a #VMEXIT which was intercepted (Exit vector). */ if (pVmcb->ctrl.ExitIntInfo.n.u1Valid) { uint8_t uIdtVector = pVmcb->ctrl.ExitIntInfo.n.u8Vector; typedef enum { SVMREFLECTXCPT_XCPT, /* Reflect the exception to the guest or for further evaluation by VMM. */ SVMREFLECTXCPT_DF, /* Reflect the exception as a double-fault to the guest. */ SVMREFLECTXCPT_TF, /* Indicate a triple faulted state to the VMM. */ SVMREFLECTXCPT_HANG, /* Indicate bad VM trying to deadlock the CPU. */ SVMREFLECTXCPT_NONE /* Nothing to reflect. */ } SVMREFLECTXCPT; SVMREFLECTXCPT enmReflect = SVMREFLECTXCPT_NONE; bool fReflectingNmi = false; if (pVmcb->ctrl.ExitIntInfo.n.u3Type == SVM_EVENT_EXCEPTION) { if (pSvmTransient->u64ExitCode - SVM_EXIT_EXCEPTION_0 <= SVM_EXIT_EXCEPTION_1F) { uint8_t uExitVector = (uint8_t)(pSvmTransient->u64ExitCode - SVM_EXIT_EXCEPTION_0); #ifdef VBOX_STRICT if ( hmR0SvmIsContributoryXcpt(uIdtVector) && uExitVector == X86_XCPT_PF) { Log4(("IDT: Contributory #PF idCpu=%u uCR2=%#RX64\n", pVCpu->idCpu, pCtx->cr2)); } #endif if ( uIdtVector == X86_XCPT_BP || uIdtVector == X86_XCPT_OF) { /* Ignore INT3/INTO, just re-execute. See @bugref{8357}. */ } else if ( uExitVector == X86_XCPT_PF && uIdtVector == X86_XCPT_PF) { pSvmTransient->fVectoringDoublePF = true; Log4(("IDT: Vectoring double #PF uCR2=%#RX64\n", pCtx->cr2)); } else if ( uExitVector == X86_XCPT_AC && uIdtVector == X86_XCPT_AC) { enmReflect = SVMREFLECTXCPT_HANG; Log4(("IDT: Nested #AC - Bad guest\n")); } else if ( (pVmcb->ctrl.u32InterceptException & HMSVM_CONTRIBUTORY_XCPT_MASK) && hmR0SvmIsContributoryXcpt(uExitVector) && ( hmR0SvmIsContributoryXcpt(uIdtVector) || uIdtVector == X86_XCPT_PF)) { enmReflect = SVMREFLECTXCPT_DF; Log4(("IDT: Pending vectoring #DF %#RX64 uIdtVector=%#x uExitVector=%#x\n", pVCpu->hm.s.Event.u64IntInfo, uIdtVector, uExitVector)); } else if (uIdtVector == X86_XCPT_DF) { enmReflect = SVMREFLECTXCPT_TF; Log4(("IDT: Pending vectoring triple-fault %#RX64 uIdtVector=%#x uExitVector=%#x\n", pVCpu->hm.s.Event.u64IntInfo, uIdtVector, uExitVector)); } else enmReflect = SVMREFLECTXCPT_XCPT; } else { /* * If event delivery caused an #VMEXIT that is not an exception (e.g. #NPF) then reflect the original * exception to the guest after handling the #VMEXIT. */ enmReflect = SVMREFLECTXCPT_XCPT; } } else if ( pVmcb->ctrl.ExitIntInfo.n.u3Type == SVM_EVENT_EXTERNAL_IRQ || pVmcb->ctrl.ExitIntInfo.n.u3Type == SVM_EVENT_NMI) { enmReflect = SVMREFLECTXCPT_XCPT; fReflectingNmi = RT_BOOL(pVmcb->ctrl.ExitIntInfo.n.u3Type == SVM_EVENT_NMI); if (pSvmTransient->u64ExitCode - SVM_EXIT_EXCEPTION_0 <= SVM_EXIT_EXCEPTION_1F) { uint8_t uExitVector = (uint8_t)(pSvmTransient->u64ExitCode - SVM_EXIT_EXCEPTION_0); if (uExitVector == X86_XCPT_PF) { pSvmTransient->fVectoringPF = true; Log4(("IDT: Vectoring #PF due to Ext-Int/NMI. uCR2=%#RX64\n", pCtx->cr2)); } } } /* else: Ignore software interrupts (INT n) as they reoccur when restarting the instruction. */ switch (enmReflect) { case SVMREFLECTXCPT_XCPT: { /* If we are re-injecting the NMI, clear NMI blocking. */ if (fReflectingNmi) VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_BLOCK_NMIS); Assert(pVmcb->ctrl.ExitIntInfo.n.u3Type != SVM_EVENT_SOFTWARE_INT); STAM_COUNTER_INC(&pVCpu->hm.s.StatInjectPendingReflect); hmR0SvmSetPendingEvent(pVCpu, &pVmcb->ctrl.ExitIntInfo, 0 /* GCPtrFaultAddress */); /* If uExitVector is #PF, CR2 value will be updated from the VMCB if it's a guest #PF. See hmR0SvmExitXcptPF(). */ Log4(("IDT: Pending vectoring event %#RX64 ErrValid=%RTbool Err=%#RX32\n", pVmcb->ctrl.ExitIntInfo.u, !!pVmcb->ctrl.ExitIntInfo.n.u1ErrorCodeValid, pVmcb->ctrl.ExitIntInfo.n.u32ErrorCode)); break; } case SVMREFLECTXCPT_DF: { STAM_COUNTER_INC(&pVCpu->hm.s.StatInjectPendingReflect); hmR0SvmSetPendingXcptDF(pVCpu); rc = VINF_HM_DOUBLE_FAULT; break; } case SVMREFLECTXCPT_TF: { rc = VINF_EM_RESET; break; } case SVMREFLECTXCPT_HANG: { rc = VERR_EM_GUEST_CPU_HANG; break; } default: Assert(rc == VINF_SUCCESS); break; } } Assert(rc == VINF_SUCCESS || rc == VINF_HM_DOUBLE_FAULT || rc == VINF_EM_RESET || rc == VERR_EM_GUEST_CPU_HANG); NOREF(pCtx); return rc; } /** * Updates interrupt shadow for the current RIP. */ #define HMSVM_UPDATE_INTR_SHADOW(pVCpu, pCtx) \ do { \ /* Update interrupt shadow. */ \ if ( VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS) \ && pCtx->rip != EMGetInhibitInterruptsPC(pVCpu)) \ VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INHIBIT_INTERRUPTS); \ } while (0) /** * Advances the guest RIP making use of the CPU's NRIP_SAVE feature if * supported, otherwise advances the RIP by the number of bytes specified in * @a cb. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param cb RIP increment value in bytes. * * @remarks Use this function only from \#VMEXIT's where the NRIP value is valid * when NRIP_SAVE is supported by the CPU, otherwise use * hmR0SvmAdvanceRipDumb! */ DECLINLINE(void) hmR0SvmAdvanceRipHwAssist(PVMCPU pVCpu, PCPUMCTX pCtx, uint32_t cb) { if (pVCpu->CTX_SUFF(pVM)->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_NRIP_SAVE) { PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; Assert(pVmcb->ctrl.u64NextRIP); Assert(pVmcb->ctrl.u64NextRIP - pCtx->rip == cb); pCtx->rip = pVmcb->ctrl.u64NextRIP; } else pCtx->rip += cb; HMSVM_UPDATE_INTR_SHADOW(pVCpu, pCtx); } /** * Advances the guest RIP by the number of bytes specified in @a cb. This does * not make use of any hardware features to determine the instruction length. * * @param pVCpu The cross context virtual CPU structure. * @param pCtx Pointer to the guest-CPU context. * @param cb RIP increment value in bytes. */ DECLINLINE(void) hmR0SvmAdvanceRipDumb(PVMCPU pVCpu, PCPUMCTX pCtx, uint32_t cb) { pCtx->rip += cb; HMSVM_UPDATE_INTR_SHADOW(pVCpu, pCtx); } #undef HMSVM_UPDATE_INTR_SHADOW /* -=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= */ /* -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- #VMEXIT handlers -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- */ /* -=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= */ /** @name \#VMEXIT handlers. * @{ */ /** * \#VMEXIT handler for external interrupts, NMIs, FPU assertion freeze and INIT * signals (SVM_EXIT_INTR, SVM_EXIT_NMI, SVM_EXIT_FERR_FREEZE, SVM_EXIT_INIT). */ HMSVM_EXIT_DECL hmR0SvmExitIntr(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); if (pSvmTransient->u64ExitCode == SVM_EXIT_NMI) STAM_REL_COUNTER_INC(&pVCpu->hm.s.StatExitHostNmiInGC); else if (pSvmTransient->u64ExitCode == SVM_EXIT_INTR) STAM_COUNTER_INC(&pVCpu->hm.s.StatExitExtInt); /* * AMD-V has no preemption timer and the generic periodic preemption timer has no way to signal -before- the timer * fires if the current interrupt is our own timer or a some other host interrupt. We also cannot examine what * interrupt it is until the host actually take the interrupt. * * Going back to executing guest code here unconditionally causes random scheduling problems (observed on an * AMD Phenom 9850 Quad-Core on Windows 64-bit host). */ return VINF_EM_RAW_INTERRUPT; } /** * \#VMEXIT handler for WBINVD (SVM_EXIT_WBINVD). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitWbinvd(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitWbinvd); int rc = VINF_SUCCESS; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return rc; } /** * \#VMEXIT handler for INVD (SVM_EXIT_INVD). Unconditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitInvd(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitInvd); int rc = VINF_SUCCESS; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return rc; } /** * \#VMEXIT handler for INVD (SVM_EXIT_CPUID). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitCpuid(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PVM pVM = pVCpu->CTX_SUFF(pVM); int rc = EMInterpretCpuId(pVM, pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsgFailed(("hmR0SvmExitCpuid: EMInterpretCpuId failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitCpuid); return rc; } /** * \#VMEXIT handler for RDTSC (SVM_EXIT_RDTSC). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitRdtsc(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PVM pVM = pVCpu->CTX_SUFF(pVM); int rc = EMInterpretRdtsc(pVM, pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); pSvmTransient->fUpdateTscOffsetting = true; /* Single step check. */ HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsgFailed(("hmR0SvmExitRdtsc: EMInterpretRdtsc failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitRdtsc); return rc; } /** * \#VMEXIT handler for RDTSCP (SVM_EXIT_RDTSCP). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitRdtscp(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); int rc = EMInterpretRdtscp(pVCpu->CTX_SUFF(pVM), pVCpu, pCtx); if (RT_LIKELY(rc == VINF_SUCCESS)) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 3); pSvmTransient->fUpdateTscOffsetting = true; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsgFailed(("hmR0SvmExitRdtsc: EMInterpretRdtscp failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitRdtscp); return rc; } /** * \#VMEXIT handler for RDPMC (SVM_EXIT_RDPMC). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitRdpmc(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); int rc = EMInterpretRdpmc(pVCpu->CTX_SUFF(pVM), pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsgFailed(("hmR0SvmExitRdpmc: EMInterpretRdpmc failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitRdpmc); return rc; } /** * \#VMEXIT handler for INVLPG (SVM_EXIT_INVLPG). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitInvlpg(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PVM pVM = pVCpu->CTX_SUFF(pVM); Assert(!pVM->hm.s.fNestedPaging); /** @todo Decode Assist. */ int rc = hmR0SvmInterpretInvlpg(pVM, pVCpu, pCtx); /* Updates RIP if successful. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitInvlpg); Assert(rc == VINF_SUCCESS || rc == VERR_EM_INTERPRETER); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return rc; } /** * \#VMEXIT handler for HLT (SVM_EXIT_HLT). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitHlt(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 1); int rc = EMShouldContinueAfterHalt(pVCpu, pCtx) ? VINF_SUCCESS : VINF_EM_HALT; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitHlt); if (rc != VINF_SUCCESS) STAM_COUNTER_INC(&pVCpu->hm.s.StatSwitchHltToR3); return rc; } /** * \#VMEXIT handler for MONITOR (SVM_EXIT_MONITOR). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitMonitor(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); int rc = EMInterpretMonitor(pVCpu->CTX_SUFF(pVM), pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 3); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsg(rc == VERR_EM_INTERPRETER, ("hmR0SvmExitMonitor: EMInterpretMonitor failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitMonitor); return rc; } /** * \#VMEXIT handler for MWAIT (SVM_EXIT_MWAIT). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitMwait(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); VBOXSTRICTRC rc2 = EMInterpretMWait(pVCpu->CTX_SUFF(pVM), pVCpu, CPUMCTX2CORE(pCtx)); int rc = VBOXSTRICTRC_VAL(rc2); if ( rc == VINF_EM_HALT || rc == VINF_SUCCESS) { hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 3); if ( rc == VINF_EM_HALT && EMMonitorWaitShouldContinue(pVCpu, pCtx)) { rc = VINF_SUCCESS; } HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else { AssertMsg(rc == VERR_EM_INTERPRETER, ("hmR0SvmExitMwait: EMInterpretMWait failed with %Rrc\n", rc)); rc = VERR_EM_INTERPRETER; } AssertMsg(rc == VINF_SUCCESS || rc == VINF_EM_HALT || rc == VERR_EM_INTERPRETER, ("hmR0SvmExitMwait: EMInterpretMWait failed rc=%Rrc\n", rc)); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitMwait); return rc; } /** * \#VMEXIT handler for shutdown (triple-fault) (SVM_EXIT_SHUTDOWN). Conditional * \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitShutdown(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); return VINF_EM_RESET; } /** * \#VMEXIT handler for CRx reads (SVM_EXIT_READ_CR*). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitReadCRx(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); Log4(("hmR0SvmExitReadCRx: CS:RIP=%04x:%#RX64\n", pCtx->cs.Sel, pCtx->rip)); /** @todo Decode Assist. */ VBOXSTRICTRC rc2 = EMInterpretInstruction(pVCpu, CPUMCTX2CORE(pCtx), 0 /* pvFault */); int rc = VBOXSTRICTRC_VAL(rc2); AssertMsg(rc == VINF_SUCCESS || rc == VERR_EM_INTERPRETER || rc == VINF_PGM_CHANGE_MODE || rc == VINF_PGM_SYNC_CR3, ("hmR0SvmExitReadCRx: EMInterpretInstruction failed rc=%Rrc\n", rc)); Assert((pSvmTransient->u64ExitCode - SVM_EXIT_READ_CR0) <= 15); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitCRxRead[pSvmTransient->u64ExitCode - SVM_EXIT_READ_CR0]); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return rc; } /** * \#VMEXIT handler for CRx writes (SVM_EXIT_WRITE_CR*). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitWriteCRx(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /** @todo Decode Assist. */ VBOXSTRICTRC rcStrict = IEMExecOneBypassEx(pVCpu, CPUMCTX2CORE(pCtx), NULL); if (RT_UNLIKELY( rcStrict == VERR_IEM_ASPECT_NOT_IMPLEMENTED || rcStrict == VERR_IEM_INSTR_NOT_IMPLEMENTED)) rcStrict = VERR_EM_INTERPRETER; if (rcStrict == VINF_SUCCESS) { /* RIP has been updated by EMInterpretInstruction(). */ Assert((pSvmTransient->u64ExitCode - SVM_EXIT_WRITE_CR0) <= 15); switch (pSvmTransient->u64ExitCode - SVM_EXIT_WRITE_CR0) { case 0: /* CR0. */ HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR0); break; case 3: /* CR3. */ Assert(!pVCpu->CTX_SUFF(pVM)->hm.s.fNestedPaging); HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR3); break; case 4: /* CR4. */ HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR4); break; case 8: /* CR8 (TPR). */ HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); break; default: AssertMsgFailed(("hmR0SvmExitWriteCRx: Invalid/Unexpected Write-CRx exit. u64ExitCode=%#RX64 %#x\n", pSvmTransient->u64ExitCode, pSvmTransient->u64ExitCode - SVM_EXIT_WRITE_CR0)); break; } HMSVM_CHECK_SINGLE_STEP(pVCpu, rcStrict); } else Assert(rcStrict == VERR_EM_INTERPRETER || rcStrict == VINF_PGM_CHANGE_MODE || rcStrict == VINF_PGM_SYNC_CR3); return VBOXSTRICTRC_TODO(rcStrict); } /** * \#VMEXIT handler for instructions that result in a \#UD exception delivered * to the guest. */ HMSVM_EXIT_DECL hmR0SvmExitSetPendingXcptUD(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); hmR0SvmSetPendingXcptUD(pVCpu); return VINF_SUCCESS; } /** * \#VMEXIT handler for MSR read and writes (SVM_EXIT_MSR). Conditional * \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitMsr(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; PVM pVM = pVCpu->CTX_SUFF(pVM); int rc; if (pVmcb->ctrl.u64ExitInfo1 == SVM_EXIT1_MSR_WRITE) { STAM_COUNTER_INC(&pVCpu->hm.s.StatExitWrmsr); /* Handle TPR patching; intercepted LSTAR write. */ if ( pVM->hm.s.fTPRPatchingActive && pCtx->ecx == MSR_K8_LSTAR) { if ((pCtx->eax & 0xff) != pSvmTransient->u8GuestTpr) { /* Our patch code uses LSTAR for TPR caching for 32-bit guests. */ int rc2 = PDMApicSetTPR(pVCpu, pCtx->eax & 0xff); AssertRC(rc2); HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); } hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 2); rc = VINF_SUCCESS; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return rc; } if (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_NRIP_SAVE) { rc = EMInterpretWrmsr(pVM, pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { pCtx->rip = pVmcb->ctrl.u64NextRIP; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else AssertMsg( rc == VERR_EM_INTERPRETER || rc == VINF_CPUM_R3_MSR_WRITE, ("hmR0SvmExitMsr: EMInterpretWrmsr failed rc=%Rrc\n", rc)); } else { rc = VBOXSTRICTRC_TODO(EMInterpretInstruction(pVCpu, CPUMCTX2CORE(pCtx), 0 /* pvFault */)); if (RT_LIKELY(rc == VINF_SUCCESS)) HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); /* RIP updated by EMInterpretInstruction(). */ else AssertMsg( rc == VERR_EM_INTERPRETER || rc == VINF_CPUM_R3_MSR_WRITE, ("hmR0SvmExitMsr: WrMsr. EMInterpretInstruction failed rc=%Rrc\n", rc)); } if (rc == VINF_SUCCESS) { /* If this is an X2APIC WRMSR access, update the APIC state as well. */ if ( pCtx->ecx >= MSR_IA32_X2APIC_START && pCtx->ecx <= MSR_IA32_X2APIC_END) { /* * We've already saved the APIC related guest-state (TPR) in hmR0SvmPostRunGuest(). When full APIC register * virtualization is implemented we'll have to make sure APIC state is saved from the VMCB before * EMInterpretWrmsr() changes it. */ HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); } else if (pCtx->ecx == MSR_K6_EFER) HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_EFER_MSR); else if (pCtx->ecx == MSR_IA32_TSC) pSvmTransient->fUpdateTscOffsetting = true; } } else { /* MSR Read access. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitRdmsr); Assert(pVmcb->ctrl.u64ExitInfo1 == SVM_EXIT1_MSR_READ); if (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_NRIP_SAVE) { rc = EMInterpretRdmsr(pVM, pVCpu, CPUMCTX2CORE(pCtx)); if (RT_LIKELY(rc == VINF_SUCCESS)) { pCtx->rip = pVmcb->ctrl.u64NextRIP; HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else AssertMsg( rc == VERR_EM_INTERPRETER || rc == VINF_CPUM_R3_MSR_READ, ("hmR0SvmExitMsr: EMInterpretRdmsr failed rc=%Rrc\n", rc)); } else { rc = VBOXSTRICTRC_TODO(EMInterpretInstruction(pVCpu, CPUMCTX2CORE(pCtx), 0)); if (RT_UNLIKELY(rc != VINF_SUCCESS)) { AssertMsg( rc == VERR_EM_INTERPRETER || rc == VINF_CPUM_R3_MSR_READ, ("hmR0SvmExitMsr: RdMsr. EMInterpretInstruction failed rc=%Rrc\n", rc)); } /* RIP updated by EMInterpretInstruction(). */ HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } } /* RIP has been updated by EMInterpret[Rd|Wr]msr(). */ return rc; } /** * \#VMEXIT handler for DRx read (SVM_EXIT_READ_DRx). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitReadDRx(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitDRxRead); /* We should -not- get this #VMEXIT if the guest's debug registers were active. */ if (pSvmTransient->fWasGuestDebugStateActive) { AssertMsgFailed(("hmR0SvmHandleExit: Unexpected exit %#RX32\n", (uint32_t)pSvmTransient->u64ExitCode)); pVCpu->hm.s.u32HMError = (uint32_t)pSvmTransient->u64ExitCode; return VERR_SVM_UNEXPECTED_EXIT; } /* * Lazy DR0-3 loading. */ if (!pSvmTransient->fWasHyperDebugStateActive) { Assert(!DBGFIsStepping(pVCpu)); Assert(!pVCpu->hm.s.fSingleInstruction); Log5(("hmR0SvmExitReadDRx: Lazy loading guest debug registers\n")); /* Don't intercept DRx read and writes. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pVmcb->ctrl.u16InterceptRdDRx = 0; pVmcb->ctrl.u16InterceptWrDRx = 0; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_INTERCEPTS; /* We're playing with the host CPU state here, make sure we don't preempt or longjmp. */ VMMRZCallRing3Disable(pVCpu); HM_DISABLE_PREEMPT(); /* Save the host & load the guest debug state, restart execution of the MOV DRx instruction. */ CPUMR0LoadGuestDebugState(pVCpu, false /* include DR6 */); Assert(CPUMIsGuestDebugStateActive(pVCpu) || HC_ARCH_BITS == 32); HM_RESTORE_PREEMPT(); VMMRZCallRing3Enable(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatDRxContextSwitch); return VINF_SUCCESS; } /* * Interpret the read/writing of DRx. */ /** @todo Decode assist. */ VBOXSTRICTRC rc = EMInterpretInstruction(pVCpu, CPUMCTX2CORE(pCtx), 0 /* pvFault */); Log5(("hmR0SvmExitReadDRx: Emulated DRx access: rc=%Rrc\n", VBOXSTRICTRC_VAL(rc))); if (RT_LIKELY(rc == VINF_SUCCESS)) { /* Not necessary for read accesses but whatever doesn't hurt for now, will be fixed with decode assist. */ /** @todo CPUM should set this flag! */ HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_DEBUG); HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); } else Assert(rc == VERR_EM_INTERPRETER); return VBOXSTRICTRC_TODO(rc); } /** * \#VMEXIT handler for DRx write (SVM_EXIT_WRITE_DRx). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitWriteDRx(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* For now it's the same since we interpret the instruction anyway. Will change when using of Decode Assist is implemented. */ int rc = hmR0SvmExitReadDRx(pVCpu, pCtx, pSvmTransient); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitDRxWrite); STAM_COUNTER_DEC(&pVCpu->hm.s.StatExitDRxRead); return rc; } /** * \#VMEXIT handler for XCRx write (SVM_EXIT_XSETBV). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXsetbv(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /** @todo decode assists... */ VBOXSTRICTRC rcStrict = IEMExecOne(pVCpu); if (rcStrict == VINF_IEM_RAISED_XCPT) HMCPU_CF_SET(pVCpu, HM_CHANGED_ALL_GUEST); pVCpu->hm.s.fLoadSaveGuestXcr0 = (pCtx->cr4 & X86_CR4_OSXSAVE) && pCtx->aXcr[0] != ASMGetXcr0(); Log4(("hmR0SvmExitXsetbv: New XCR0=%#RX64 fLoadSaveGuestXcr0=%d (cr4=%RX64) rcStrict=%Rrc\n", pCtx->aXcr[0], pVCpu->hm.s.fLoadSaveGuestXcr0, pCtx->cr4, VBOXSTRICTRC_VAL(rcStrict))); HMSVM_CHECK_SINGLE_STEP(pVCpu, rcStrict); return VBOXSTRICTRC_TODO(rcStrict); } /** * \#VMEXIT handler for I/O instructions (SVM_EXIT_IOIO). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitIOInstr(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* I/O operation lookup arrays. */ static uint32_t const s_aIOSize[8] = { 0, 1, 2, 0, 4, 0, 0, 0 }; /* Size of the I/O accesses in bytes. */ static uint32_t const s_aIOOpAnd[8] = { 0, 0xff, 0xffff, 0, 0xffffffff, 0, 0, 0 }; /* AND masks for saving the result (in AL/AX/EAX). */ Log4(("hmR0SvmExitIOInstr: CS:RIP=%04x:%#RX64\n", pCtx->cs.Sel, pCtx->rip)); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; PVM pVM = pVCpu->CTX_SUFF(pVM); /* Refer AMD spec. 15.10.2 "IN and OUT Behaviour" and Figure 15-2. "EXITINFO1 for IOIO Intercept" for the format. */ SVMIOIOEXIT IoExitInfo; IoExitInfo.u = (uint32_t)pVmcb->ctrl.u64ExitInfo1; uint32_t uIOWidth = (IoExitInfo.u >> 4) & 0x7; uint32_t cbValue = s_aIOSize[uIOWidth]; uint32_t uAndVal = s_aIOOpAnd[uIOWidth]; if (RT_UNLIKELY(!cbValue)) { AssertMsgFailed(("hmR0SvmExitIOInstr: Invalid IO operation. uIOWidth=%u\n", uIOWidth)); return VERR_EM_INTERPRETER; } VBOXSTRICTRC rcStrict; bool fUpdateRipAlready = false; if (IoExitInfo.n.u1STR) { #ifdef VBOX_WITH_2ND_IEM_STEP /* INS/OUTS - I/O String instruction. */ /** @todo Huh? why can't we use the segment prefix information given by AMD-V * in EXITINFO1? Investigate once this thing is up and running. */ Log4(("CS:RIP=%04x:%08RX64 %#06x/%u %c str\n", pCtx->cs.Sel, pCtx->rip, IoExitInfo.n.u16Port, cbValue, IoExitInfo.n.u1Type == SVM_IOIO_WRITE ? 'w' : 'r')); AssertReturn(pCtx->dx == IoExitInfo.n.u16Port, VERR_SVM_IPE_2); static IEMMODE const s_aenmAddrMode[8] = { (IEMMODE)-1, IEMMODE_16BIT, IEMMODE_32BIT, (IEMMODE)-1, IEMMODE_64BIT, (IEMMODE)-1, (IEMMODE)-1, (IEMMODE)-1 }; IEMMODE enmAddrMode = s_aenmAddrMode[(IoExitInfo.u >> 7) & 0x7]; if (enmAddrMode != (IEMMODE)-1) { uint64_t cbInstr = pVmcb->ctrl.u64ExitInfo2 - pCtx->rip; if (cbInstr <= 15 && cbInstr >= 1) { Assert(cbInstr >= 1U + IoExitInfo.n.u1REP); if (IoExitInfo.n.u1Type == SVM_IOIO_WRITE) { /* Don't know exactly how to detect whether u3SEG is valid, currently only enabling it for Bulldozer and later with NRIP. OS/2 broke on 2384 Opterons when only checking NRIP. */ if ( (pVM->hm.s.svm.u32Features & AMD_CPUID_SVM_FEATURE_EDX_NRIP_SAVE) && pVM->cpum.ro.GuestFeatures.enmMicroarch >= kCpumMicroarch_AMD_15h_First) { AssertMsg(IoExitInfo.n.u3SEG == X86_SREG_DS || cbInstr > 1U + IoExitInfo.n.u1REP, ("u32Seg=%d cbInstr=%d u1REP=%d", IoExitInfo.n.u3SEG, cbInstr, IoExitInfo.n.u1REP)); rcStrict = IEMExecStringIoWrite(pVCpu, cbValue, enmAddrMode, IoExitInfo.n.u1REP, (uint8_t)cbInstr, IoExitInfo.n.u3SEG, true /*fIoChecked*/); } else if (cbInstr == 1U + IoExitInfo.n.u1REP) rcStrict = IEMExecStringIoWrite(pVCpu, cbValue, enmAddrMode, IoExitInfo.n.u1REP, (uint8_t)cbInstr, X86_SREG_DS, true /*fIoChecked*/); else rcStrict = IEMExecOne(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIOStringWrite); } else { AssertMsg(IoExitInfo.n.u3SEG == X86_SREG_ES /*=0*/, ("%#x\n", IoExitInfo.n.u3SEG)); rcStrict = IEMExecStringIoRead(pVCpu, cbValue, enmAddrMode, IoExitInfo.n.u1REP, (uint8_t)cbInstr, true /*fIoChecked*/); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIOStringRead); } } else { AssertMsgFailed(("rip=%RX64 nrip=%#RX64 cbInstr=%#RX64\n", pCtx->rip, pVmcb->ctrl.u64ExitInfo2, cbInstr)); rcStrict = IEMExecOne(pVCpu); } } else { AssertMsgFailed(("IoExitInfo=%RX64\n", IoExitInfo.u)); rcStrict = IEMExecOne(pVCpu); } fUpdateRipAlready = true; #else /* INS/OUTS - I/O String instruction. */ PDISCPUSTATE pDis = &pVCpu->hm.s.DisState; /** @todo Huh? why can't we use the segment prefix information given by AMD-V * in EXITINFO1? Investigate once this thing is up and running. */ rcStrict = EMInterpretDisasCurrent(pVM, pVCpu, pDis, NULL); if (rcStrict == VINF_SUCCESS) { if (IoExitInfo.n.u1Type == SVM_IOIO_WRITE) { rcStrict = IOMInterpretOUTSEx(pVM, pVCpu, CPUMCTX2CORE(pCtx), IoExitInfo.n.u16Port, pDis->fPrefix, (DISCPUMODE)pDis->uAddrMode, cbValue); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIOStringWrite); } else { rcStrict = IOMInterpretINSEx(pVM, pVCpu, CPUMCTX2CORE(pCtx), IoExitInfo.n.u16Port, pDis->fPrefix, (DISCPUMODE)pDis->uAddrMode, cbValue); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIOStringRead); } } else rcStrict = VINF_EM_RAW_EMULATE_INSTR; #endif } else { /* IN/OUT - I/O instruction. */ Assert(!IoExitInfo.n.u1REP); if (IoExitInfo.n.u1Type == SVM_IOIO_WRITE) { rcStrict = IOMIOPortWrite(pVM, pVCpu, IoExitInfo.n.u16Port, pCtx->eax & uAndVal, cbValue); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIOWrite); } else { uint32_t u32Val = 0; rcStrict = IOMIOPortRead(pVM, pVCpu, IoExitInfo.n.u16Port, &u32Val, cbValue); if (IOM_SUCCESS(rcStrict)) { /* Save result of I/O IN instr. in AL/AX/EAX. */ /** @todo r=bird: 32-bit op size should clear high bits of rax! */ pCtx->eax = (pCtx->eax & ~uAndVal) | (u32Val & uAndVal); } else if (rcStrict == VINF_IOM_R3_IOPORT_READ) HMR0SavePendingIOPortRead(pVCpu, pCtx->rip, pVmcb->ctrl.u64ExitInfo2, IoExitInfo.n.u16Port, uAndVal, cbValue); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIORead); } } if (IOM_SUCCESS(rcStrict)) { /* AMD-V saves the RIP of the instruction following the IO instruction in EXITINFO2. */ if (!fUpdateRipAlready) pCtx->rip = pVmcb->ctrl.u64ExitInfo2; /* * If any I/O breakpoints are armed, we need to check if one triggered * and take appropriate action. * Note that the I/O breakpoint type is undefined if CR4.DE is 0. */ /** @todo Optimize away the DBGFBpIsHwIoArmed call by having DBGF tell the * execution engines about whether hyper BPs and such are pending. */ uint32_t const uDr7 = pCtx->dr[7]; if (RT_UNLIKELY( ( (uDr7 & X86_DR7_ENABLED_MASK) && X86_DR7_ANY_RW_IO(uDr7) && (pCtx->cr4 & X86_CR4_DE)) || DBGFBpIsHwIoArmed(pVM))) { /* We're playing with the host CPU state here, make sure we don't preempt or longjmp. */ VMMRZCallRing3Disable(pVCpu); HM_DISABLE_PREEMPT(); STAM_COUNTER_INC(&pVCpu->hm.s.StatDRxIoCheck); CPUMR0DebugStateMaybeSaveGuest(pVCpu, false /*fDr6*/); VBOXSTRICTRC rcStrict2 = DBGFBpCheckIo(pVM, pVCpu, pCtx, IoExitInfo.n.u16Port, cbValue); if (rcStrict2 == VINF_EM_RAW_GUEST_TRAP) { /* Raise #DB. */ pVmcb->guest.u64DR6 = pCtx->dr[6]; pVmcb->guest.u64DR7 = pCtx->dr[7]; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DRX; hmR0SvmSetPendingXcptDB(pVCpu); } /* rcStrict is VINF_SUCCESS, VINF_IOM_R3_IOPORT_COMMIT_WRITE, or in [VINF_EM_FIRST..VINF_EM_LAST], however we can ditch VINF_IOM_R3_IOPORT_COMMIT_WRITE as it has VMCPU_FF_IOM as backup. */ else if ( rcStrict2 != VINF_SUCCESS && (rcStrict == VINF_SUCCESS || rcStrict2 < rcStrict)) rcStrict = rcStrict2; AssertCompile(VINF_EM_LAST < VINF_IOM_R3_IOPORT_COMMIT_WRITE); HM_RESTORE_PREEMPT(); VMMRZCallRing3Enable(pVCpu); } HMSVM_CHECK_SINGLE_STEP(pVCpu, rcStrict); } #ifdef VBOX_STRICT if (rcStrict == VINF_IOM_R3_IOPORT_READ) Assert(IoExitInfo.n.u1Type == SVM_IOIO_READ); else if (rcStrict == VINF_IOM_R3_IOPORT_WRITE || rcStrict == VINF_IOM_R3_IOPORT_COMMIT_WRITE) Assert(IoExitInfo.n.u1Type == SVM_IOIO_WRITE); else { /** @todo r=bird: This is missing a bunch of VINF_EM_FIRST..VINF_EM_LAST * statuses, that the VMM device and some others may return. See * IOM_SUCCESS() for guidance. */ AssertMsg( RT_FAILURE(rcStrict) || rcStrict == VINF_SUCCESS || rcStrict == VINF_EM_RAW_EMULATE_INSTR || rcStrict == VINF_EM_DBG_BREAKPOINT || rcStrict == VINF_EM_RAW_GUEST_TRAP || rcStrict == VINF_EM_RAW_TO_R3 || rcStrict == VINF_TRPM_XCPT_DISPATCHED, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict))); } #endif return VBOXSTRICTRC_TODO(rcStrict); } /** * \#VMEXIT handler for Nested Page-faults (SVM_EXIT_NPF). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitNestedPF(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PVM pVM = pVCpu->CTX_SUFF(pVM); Assert(pVM->hm.s.fNestedPaging); HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY(); /* See AMD spec. 15.25.6 "Nested versus Guest Page Faults, Fault Ordering" for VMCB details for #NPF. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; uint32_t u32ErrCode = pVmcb->ctrl.u64ExitInfo1; RTGCPHYS GCPhysFaultAddr = pVmcb->ctrl.u64ExitInfo2; Log4(("#NPF at CS:RIP=%04x:%#RX64 faultaddr=%RGp errcode=%#x \n", pCtx->cs.Sel, pCtx->rip, GCPhysFaultAddr, u32ErrCode)); #ifdef VBOX_HM_WITH_GUEST_PATCHING /* TPR patching for 32-bit guests, using the reserved bit in the page tables for MMIO regions. */ if ( pVM->hm.s.fTprPatchingAllowed && (GCPhysFaultAddr & PAGE_OFFSET_MASK) == 0x80 /* TPR offset. */ && ( !(u32ErrCode & X86_TRAP_PF_P) /* Not present */ || (u32ErrCode & (X86_TRAP_PF_P | X86_TRAP_PF_RSVD)) == (X86_TRAP_PF_P | X86_TRAP_PF_RSVD)) /* MMIO page. */ && !CPUMIsGuestInLongModeEx(pCtx) && !CPUMGetGuestCPL(pVCpu) && pVM->hm.s.cPatches < RT_ELEMENTS(pVM->hm.s.aPatches)) { RTGCPHYS GCPhysApicBase = pCtx->msrApicBase; GCPhysApicBase &= PAGE_BASE_GC_MASK; if (GCPhysFaultAddr == GCPhysApicBase + 0x80) { /* Only attempt to patch the instruction once. */ PHMTPRPATCH pPatch = (PHMTPRPATCH)RTAvloU32Get(&pVM->hm.s.PatchTree, (AVLOU32KEY)pCtx->eip); if (!pPatch) return VINF_EM_HM_PATCH_TPR_INSTR; } } #endif /* * Determine the nested paging mode. */ PGMMODE enmNestedPagingMode; #if HC_ARCH_BITS == 32 if (CPUMIsGuestInLongModeEx(pCtx)) enmNestedPagingMode = PGMMODE_AMD64_NX; else #endif enmNestedPagingMode = PGMGetHostMode(pVM); /* * MMIO optimization using the reserved (RSVD) bit in the guest page tables for MMIO pages. */ int rc; Assert((u32ErrCode & (X86_TRAP_PF_RSVD | X86_TRAP_PF_P)) != X86_TRAP_PF_RSVD); if ((u32ErrCode & (X86_TRAP_PF_RSVD | X86_TRAP_PF_P)) == (X86_TRAP_PF_RSVD | X86_TRAP_PF_P)) { /* If event delivery causes an MMIO #NPF, go back to instruction emulation as otherwise injecting the original pending event would most likely cause the same MMIO #NPF. */ if (RT_UNLIKELY(pVCpu->hm.s.Event.fPending)) return VERR_EM_INTERPRETER; VBOXSTRICTRC rc2 = PGMR0Trap0eHandlerNPMisconfig(pVM, pVCpu, enmNestedPagingMode, CPUMCTX2CORE(pCtx), GCPhysFaultAddr, u32ErrCode); rc = VBOXSTRICTRC_VAL(rc2); /* * If we succeed, resume guest execution. * If we fail in interpreting the instruction because we couldn't get the guest physical address * of the page containing the instruction via the guest's page tables (we would invalidate the guest page * in the host TLB), resume execution which would cause a guest page fault to let the guest handle this * weird case. See @bugref{6043}. */ if ( rc == VINF_SUCCESS || rc == VERR_PAGE_TABLE_NOT_PRESENT || rc == VERR_PAGE_NOT_PRESENT) { /* Successfully handled MMIO operation. */ HMCPU_CF_SET(pVCpu, HM_CHANGED_SVM_GUEST_APIC_STATE); rc = VINF_SUCCESS; } return rc; } TRPMAssertXcptPF(pVCpu, GCPhysFaultAddr, u32ErrCode); rc = PGMR0Trap0eHandlerNestedPaging(pVM, pVCpu, enmNestedPagingMode, u32ErrCode, CPUMCTX2CORE(pCtx), GCPhysFaultAddr); TRPMResetTrap(pVCpu); Log4(("#NPF: PGMR0Trap0eHandlerNestedPaging returned %Rrc CS:RIP=%04x:%#RX64\n", rc, pCtx->cs.Sel, pCtx->rip)); /* * Same case as PGMR0Trap0eHandlerNPMisconfig(). See comment above, @bugref{6043}. */ if ( rc == VINF_SUCCESS || rc == VERR_PAGE_TABLE_NOT_PRESENT || rc == VERR_PAGE_NOT_PRESENT) { /* We've successfully synced our shadow page tables. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitShadowPF); rc = VINF_SUCCESS; } return rc; } /** * \#VMEXIT handler for virtual interrupt (SVM_EXIT_VINTR). Conditional * \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitVIntr(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; pVmcb->ctrl.IntCtrl.n.u1VIrqValid = 0; /* No virtual interrupts pending, we'll inject the current one/NMI before reentry. */ pVmcb->ctrl.IntCtrl.n.u8VIrqVector = 0; /* Indicate that we no longer need to #VMEXIT when the guest is ready to receive interrupts/NMIs, it is now ready. */ pVmcb->ctrl.u32InterceptCtrl1 &= ~SVM_CTRL1_INTERCEPT_VINTR; pVmcb->ctrl.u64VmcbCleanBits &= ~(HMSVM_VMCB_CLEAN_INTERCEPTS | HMSVM_VMCB_CLEAN_TPR); /* Deliver the pending interrupt/NMI via hmR0SvmEvaluatePendingEvent() and resume guest execution. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitIntWindow); return VINF_SUCCESS; } /** * \#VMEXIT handler for task switches (SVM_EXIT_TASK_SWITCH). Conditional * \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitTaskSwitch(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY(); #ifndef HMSVM_ALWAYS_TRAP_TASK_SWITCH Assert(!pVCpu->CTX_SUFF(pVM)->hm.s.fNestedPaging); #endif /* Check if this task-switch occurred while delivering an event through the guest IDT. */ if (pVCpu->hm.s.Event.fPending) /* Can happen with exceptions/NMI. See @bugref{8411}. */ { /* * AMD-V provides us with the exception which caused the TS; we collect * the information in the call to hmR0SvmCheckExitDueToEventDelivery. */ Log4(("hmR0SvmExitTaskSwitch: TS occurred during event delivery.\n")); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitTaskSwitch); return VINF_EM_RAW_INJECT_TRPM_EVENT; } /** @todo Emulate task switch someday, currently just going back to ring-3 for * emulation. */ STAM_COUNTER_INC(&pVCpu->hm.s.StatExitTaskSwitch); return VERR_EM_INTERPRETER; } /** * \#VMEXIT handler for VMMCALL (SVM_EXIT_VMMCALL). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitVmmCall(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitVmcall); /* First check if this is a patched VMMCALL for mov TPR */ int rc = hmR0SvmEmulateMovTpr(pVCpu->CTX_SUFF(pVM), pVCpu, pCtx); if (rc == VINF_SUCCESS) { HMSVM_CHECK_SINGLE_STEP(pVCpu, rc); return VINF_SUCCESS; } if (rc == VERR_NOT_FOUND) { if (pVCpu->hm.s.fHypercallsEnabled) { VBOXSTRICTRC rcStrict = GIMHypercall(pVCpu, pCtx); if (RT_SUCCESS(VBOXSTRICTRC_VAL(rcStrict))) { if (rcStrict == VINF_SUCCESS) hmR0SvmAdvanceRipHwAssist(pVCpu, pCtx, 3 /* cbInstr */); else Assert( rcStrict == VINF_GIM_HYPERCALL_CONTINUING || rcStrict == VINF_GIM_R3_HYPERCALL); /* If the hypercall changes anything other than guest's general-purpose registers, we would need to reload the guest changed bits here before VM-entry. */ } rc = VBOXSTRICTRC_VAL(rcStrict); } else Log4(("hmR0SvmExitVmmCall: Hypercalls not enabled\n")); } /* If hypercalls are disabled or the hypercall failed for some reason, raise #UD and continue. */ if (RT_FAILURE(rc)) { hmR0SvmSetPendingXcptUD(pVCpu); rc = VINF_SUCCESS; } return rc; } /** * \#VMEXIT handler for VMMCALL (SVM_EXIT_VMMCALL). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitPause(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitPause); return VINF_EM_RAW_INTERRUPT; } /** * \#VMEXIT handler for IRET (SVM_EXIT_IRET). Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitIret(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* Clear NMI blocking. */ VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_BLOCK_NMIS); /* Indicate that we no longer need to #VMEXIT when the guest is ready to receive NMIs, it is now ready. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; hmR0SvmClearIretIntercept(pVmcb); /* Deliver the pending NMI via hmR0SvmEvaluatePendingEvent() and resume guest execution. */ return VINF_SUCCESS; } /** * \#VMEXIT handler for page-fault exceptions (SVM_EXIT_EXCEPTION_E). * Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptPF(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY(); /* See AMD spec. 15.12.15 "#PF (Page Fault)". */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; uint32_t u32ErrCode = pVmcb->ctrl.u64ExitInfo1; RTGCUINTPTR uFaultAddress = pVmcb->ctrl.u64ExitInfo2; PVM pVM = pVCpu->CTX_SUFF(pVM); #if defined(HMSVM_ALWAYS_TRAP_ALL_XCPTS) || defined(HMSVM_ALWAYS_TRAP_PF) if (pVM->hm.s.fNestedPaging) { pVCpu->hm.s.Event.fPending = false; /* In case it's a contributory or vectoring #PF. */ if (!pSvmTransient->fVectoringDoublePF) { /* A genuine guest #PF, reflect it to the guest. */ hmR0SvmSetPendingXcptPF(pVCpu, pCtx, u32ErrCode, uFaultAddress); Log4(("#PF: Guest page fault at %04X:%RGv FaultAddr=%RGv ErrCode=%#x\n", pCtx->cs.Sel, (RTGCPTR)pCtx->rip, uFaultAddress, u32ErrCode)); } else { /* A guest page-fault occurred during delivery of a page-fault. Inject #DF. */ hmR0SvmSetPendingXcptDF(pVCpu); Log4(("Pending #DF due to vectoring #PF. NP\n")); } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestPF); return VINF_SUCCESS; } #endif Assert(!pVM->hm.s.fNestedPaging); #ifdef VBOX_HM_WITH_GUEST_PATCHING /* Shortcut for APIC TPR reads and writes; only applicable to 32-bit guests. */ if ( pVM->hm.s.fTprPatchingAllowed && (uFaultAddress & 0xfff) == 0x80 /* TPR offset. */ && !(u32ErrCode & X86_TRAP_PF_P) /* Not present. */ && !CPUMIsGuestInLongModeEx(pCtx) && !CPUMGetGuestCPL(pVCpu) && pVM->hm.s.cPatches < RT_ELEMENTS(pVM->hm.s.aPatches)) { RTGCPHYS GCPhysApicBase; GCPhysApicBase = pCtx->msrApicBase; GCPhysApicBase &= PAGE_BASE_GC_MASK; /* Check if the page at the fault-address is the APIC base. */ RTGCPHYS GCPhysPage; int rc2 = PGMGstGetPage(pVCpu, (RTGCPTR)uFaultAddress, NULL /* pfFlags */, &GCPhysPage); if ( rc2 == VINF_SUCCESS && GCPhysPage == GCPhysApicBase) { /* Only attempt to patch the instruction once. */ PHMTPRPATCH pPatch = (PHMTPRPATCH)RTAvloU32Get(&pVM->hm.s.PatchTree, (AVLOU32KEY)pCtx->eip); if (!pPatch) return VINF_EM_HM_PATCH_TPR_INSTR; } } #endif Log4(("#PF: uFaultAddress=%#RX64 CS:RIP=%#04x:%#RX64 u32ErrCode %#RX32 cr3=%#RX64\n", uFaultAddress, pCtx->cs.Sel, pCtx->rip, u32ErrCode, pCtx->cr3)); /* If it's a vectoring #PF, emulate injecting the original event injection as PGMTrap0eHandler() is incapable of differentiating between instruction emulation and event injection that caused a #PF. See @bugref{6607}. */ if (pSvmTransient->fVectoringPF) { Assert(pVCpu->hm.s.Event.fPending); return VINF_EM_RAW_INJECT_TRPM_EVENT; } TRPMAssertXcptPF(pVCpu, uFaultAddress, u32ErrCode); int rc = PGMTrap0eHandler(pVCpu, u32ErrCode, CPUMCTX2CORE(pCtx), (RTGCPTR)uFaultAddress); Log4(("#PF rc=%Rrc\n", rc)); if (rc == VINF_SUCCESS) { /* Successfully synced shadow pages tables or emulated an MMIO instruction. */ TRPMResetTrap(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitShadowPF); HMCPU_CF_SET(pVCpu, HM_CHANGED_ALL_GUEST); return rc; } else if (rc == VINF_EM_RAW_GUEST_TRAP) { pVCpu->hm.s.Event.fPending = false; /* In case it's a contributory or vectoring #PF. */ if (!pSvmTransient->fVectoringDoublePF) { /* It's a guest page fault and needs to be reflected to the guest. */ u32ErrCode = TRPMGetErrorCode(pVCpu); /* The error code might have been changed. */ TRPMResetTrap(pVCpu); hmR0SvmSetPendingXcptPF(pVCpu, pCtx, u32ErrCode, uFaultAddress); } else { /* A guest page-fault occurred during delivery of a page-fault. Inject #DF. */ TRPMResetTrap(pVCpu); hmR0SvmSetPendingXcptDF(pVCpu); Log4(("#PF: Pending #DF due to vectoring #PF\n")); } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestPF); return VINF_SUCCESS; } TRPMResetTrap(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitShadowPFEM); return rc; } /** * \#VMEXIT handler for device-not-available exceptions (SVM_EXIT_EXCEPTION_7). * Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptNM(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* Paranoia; Ensure we cannot be called as a result of event delivery. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; NOREF(pVmcb); Assert(!pVmcb->ctrl.ExitIntInfo.n.u1Valid); /* We're playing with the host CPU state here, make sure we don't preempt or longjmp. */ VMMRZCallRing3Disable(pVCpu); HM_DISABLE_PREEMPT(); int rc; /* If the guest FPU was active at the time of the #NM exit, then it's a guest fault. */ if (pSvmTransient->fWasGuestFPUStateActive) { rc = VINF_EM_RAW_GUEST_TRAP; Assert(CPUMIsGuestFPUStateActive(pVCpu) || HMCPU_CF_IS_PENDING(pVCpu, HM_CHANGED_GUEST_CR0)); } else { #ifndef HMSVM_ALWAYS_TRAP_ALL_XCPTS Assert(!pSvmTransient->fWasGuestFPUStateActive); #endif rc = CPUMR0Trap07Handler(pVCpu->CTX_SUFF(pVM), pVCpu); /* (No need to set HM_CHANGED_HOST_CONTEXT for SVM.) */ Assert( rc == VINF_EM_RAW_GUEST_TRAP || ((rc == VINF_SUCCESS || rc == VINF_CPUM_HOST_CR0_MODIFIED) && CPUMIsGuestFPUStateActive(pVCpu))); } HM_RESTORE_PREEMPT(); VMMRZCallRing3Enable(pVCpu); if (rc == VINF_SUCCESS || rc == VINF_CPUM_HOST_CR0_MODIFIED) { /* Guest FPU state was activated, we'll want to change CR0 FPU intercepts before the next VM-reentry. */ HMCPU_CF_SET(pVCpu, HM_CHANGED_GUEST_CR0); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitShadowNM); pVCpu->hm.s.fPreloadGuestFpu = true; } else { /* Forward #NM to the guest. */ Assert(rc == VINF_EM_RAW_GUEST_TRAP); hmR0SvmSetPendingXcptNM(pVCpu); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestNM); } return VINF_SUCCESS; } /** * \#VMEXIT handler for undefined opcode (SVM_EXIT_EXCEPTION_6). * Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptUD(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* Paranoia; Ensure we cannot be called as a result of event delivery. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; NOREF(pVmcb); Assert(!pVmcb->ctrl.ExitIntInfo.n.u1Valid); int rc = VERR_SVM_UNEXPECTED_XCPT_EXIT; if (pVCpu->hm.s.fGIMTrapXcptUD) { uint8_t cbInstr = 0; VBOXSTRICTRC rcStrict = GIMXcptUD(pVCpu, pCtx, NULL /* pDis */, &cbInstr); if (rcStrict == VINF_SUCCESS) { /* #UD #VMEXIT does not have valid NRIP information, manually advance RIP. See @bugref{7270#c170}. */ hmR0SvmAdvanceRipDumb(pVCpu, pCtx, cbInstr); rc = VINF_SUCCESS; } else if (rcStrict == VINF_GIM_HYPERCALL_CONTINUING) rc = VINF_SUCCESS; else if (rcStrict == VINF_GIM_R3_HYPERCALL) rc = VINF_GIM_R3_HYPERCALL; else Assert(RT_FAILURE(VBOXSTRICTRC_VAL(rcStrict))); } /* If the GIM #UD exception handler didn't succeed for some reason or wasn't needed, raise #UD. */ if (RT_FAILURE(rc)) { hmR0SvmSetPendingXcptUD(pVCpu); rc = VINF_SUCCESS; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestUD); return rc; } /** * \#VMEXIT handler for math-fault exceptions (SVM_EXIT_EXCEPTION_10). * Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptMF(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* Paranoia; Ensure we cannot be called as a result of event delivery. */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; NOREF(pVmcb); Assert(!pVmcb->ctrl.ExitIntInfo.n.u1Valid); STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestMF); if (!(pCtx->cr0 & X86_CR0_NE)) { PVM pVM = pVCpu->CTX_SUFF(pVM); PDISSTATE pDis = &pVCpu->hm.s.DisState; unsigned cbOp; int rc = EMInterpretDisasCurrent(pVM, pVCpu, pDis, &cbOp); if (RT_SUCCESS(rc)) { /* Convert a #MF into a FERR -> IRQ 13. See @bugref{6117}. */ rc = PDMIsaSetIrq(pVCpu->CTX_SUFF(pVM), 13, 1, 0 /* uTagSrc */); if (RT_SUCCESS(rc)) pCtx->rip += cbOp; } else Log4(("hmR0SvmExitXcptMF: EMInterpretDisasCurrent returned %Rrc uOpCode=%#x\n", rc, pDis->pCurInstr->uOpcode)); return rc; } hmR0SvmSetPendingXcptMF(pVCpu); return VINF_SUCCESS; } /** * \#VMEXIT handler for debug exceptions (SVM_EXIT_EXCEPTION_1). Conditional * \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptDB(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); /* If this #DB is the result of delivering an event, go back to the interpreter. */ HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY(); if (RT_UNLIKELY(pVCpu->hm.s.Event.fPending)) { STAM_COUNTER_INC(&pVCpu->hm.s.StatInjectPendingInterpret); return VERR_EM_INTERPRETER; } STAM_COUNTER_INC(&pVCpu->hm.s.StatExitGuestDB); /* This can be a fault-type #DB (instruction breakpoint) or a trap-type #DB (data breakpoint). However, for both cases DR6 and DR7 are updated to what the exception handler expects. See AMD spec. 15.12.2 "#DB (Debug)". */ PSVMVMCB pVmcb = (PSVMVMCB)pVCpu->hm.s.svm.pvVmcb; PVM pVM = pVCpu->CTX_SUFF(pVM); int rc = DBGFRZTrap01Handler(pVM, pVCpu, CPUMCTX2CORE(pCtx), pVmcb->guest.u64DR6, pVCpu->hm.s.fSingleInstruction); if (rc == VINF_EM_RAW_GUEST_TRAP) { Log5(("hmR0SvmExitXcptDB: DR6=%#RX64 -> guest trap\n", pVmcb->guest.u64DR6)); if (CPUMIsHyperDebugStateActive(pVCpu)) CPUMSetGuestDR6(pVCpu, CPUMGetGuestDR6(pVCpu) | pVmcb->guest.u64DR6); /* Reflect the exception back to the guest. */ hmR0SvmSetPendingXcptDB(pVCpu); rc = VINF_SUCCESS; } /* * Update DR6. */ if (CPUMIsHyperDebugStateActive(pVCpu)) { Log5(("hmR0SvmExitXcptDB: DR6=%#RX64 -> %Rrc\n", pVmcb->guest.u64DR6, rc)); pVmcb->guest.u64DR6 = X86_DR6_INIT_VAL; pVmcb->ctrl.u64VmcbCleanBits &= ~HMSVM_VMCB_CLEAN_DRX; } else { AssertMsg(rc == VINF_SUCCESS, ("rc=%Rrc\n", rc)); Assert(!pVCpu->hm.s.fSingleInstruction && !DBGFIsStepping(pVCpu)); } return rc; } /** * \#VMEXIT handler for alignment check exceptions (SVM_EXIT_EXCEPTION_11). * Conditional \#VMEXIT. */ HMSVM_EXIT_DECL hmR0SvmExitXcptAC(PVMCPU pVCpu, PCPUMCTX pCtx, PSVMTRANSIENT pSvmTransient) { HMSVM_VALIDATE_EXIT_HANDLER_PARAMS(); HMSVM_CHECK_EXIT_DUE_TO_EVENT_DELIVERY(); SVMEVENT Event; Event.u = 0; Event.n.u1Valid = 1; Event.n.u3Type = SVM_EVENT_EXCEPTION; Event.n.u8Vector = X86_XCPT_AC; Event.n.u1ErrorCodeValid = 1; hmR0SvmSetPendingEvent(pVCpu, &Event, 0 /* GCPtrFaultAddress */); return VINF_SUCCESS; } /** @} */