/**
* Process raw-mode specific forced actions.
*
* This function is called when any FFs in the VM_FF_HIGH_PRIORITY_PRE_RAW_MASK is pending.
*
* @returns VBox status code. May return VINF_EM_NO_MEMORY but none of the other
* EM statuses.
* @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 emR3HmForcedActions(PVM pVM, PVMCPU pVCpu, PCPUMCTX pCtx)
{
/*
* Sync page directory.
*/
if (VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL))
{
Assert(pVCpu->em.s.enmState != EMSTATE_WAIT_SIPI);
int rc = PGMSyncCR3(pVCpu, pCtx->cr0, pCtx->cr3, pCtx->cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
if (RT_FAILURE(rc))
return rc;
#ifdef VBOX_WITH_RAW_MODE
Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT));
#endif
/* Prefetch pages for EIP and ESP. */
/** @todo This is rather expensive. Should investigate if it really helps at all. */
rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_CS, CPUMCTX2CORE(pCtx), pCtx->rip));
if (rc == VINF_SUCCESS)
rc = PGMPrefetchPage(pVCpu, SELMToFlat(pVM, DISSELREG_SS, CPUMCTX2CORE(pCtx), pCtx->rsp));
if (rc != VINF_SUCCESS)
{
if (rc != VINF_PGM_SYNC_CR3)
{
AssertLogRelMsgReturn(RT_FAILURE(rc), ("%Rrc\n", rc), VERR_IPE_UNEXPECTED_INFO_STATUS);
return rc;
}
rc = PGMSyncCR3(pVCpu, pCtx->cr0, pCtx->cr3, pCtx->cr4, VMCPU_FF_IS_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3));
if (RT_FAILURE(rc))
return rc;
}
/** @todo maybe prefetch the supervisor stack page as well */
#ifdef VBOX_WITH_RAW_MODE
Assert(!VMCPU_FF_IS_PENDING(pVCpu, VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT));
#endif
}
/*
* Allocate handy pages (just in case the above actions have consumed some pages).
*/
if (VM_FF_IS_PENDING_EXCEPT(pVM, VM_FF_PGM_NEED_HANDY_PAGES, VM_FF_PGM_NO_MEMORY))
{
int rc = PGMR3PhysAllocateHandyPages(pVM);
if (RT_FAILURE(rc))
return rc;
}
/*
* Check whether we're out of memory now.
*
* This may stem from some of the above actions or operations that has been executed
* since we ran FFs. The allocate handy pages must for instance always be followed by
* this check.
*/
if (VM_FF_IS_PENDING(pVM, VM_FF_PGM_NO_MEMORY))
return VINF_EM_NO_MEMORY;
return VINF_SUCCESS;
}
/**
* Checks if the interrupt flag is enabled or not.
*
* @returns true if it's enabled.
* @returns false if it's disabled.
*
* @param pVM Pointer to the VM.
*/
VMM_INT_DECL(bool) PATMAreInterruptsEnabled(PVM pVM)
{
PCPUMCTX pCtx = CPUMQueryGuestCtxPtr(VMMGetCpu(pVM));
return PATMAreInterruptsEnabledByCtxCore(pVM, CPUMCTX2CORE(pCtx));
}
static int emR3ExecuteInstructionWorker(PVM pVM, PVMCPU pVCpu, int rcRC)
#endif
{
#ifdef LOG_ENABLED
PCPUMCTX pCtx = pVCpu->em.s.pCtx;
#endif
int rc;
NOREF(rcRC);
/*
*
* The simple solution is to use the recompiler.
* The better solution is to disassemble the current instruction and
* try handle as many as possible without using REM.
*
*/
#ifdef LOG_ENABLED
/*
* Disassemble the instruction if requested.
*/
if (pszPrefix)
{
DBGFR3InfoLog(pVM, "cpumguest", pszPrefix);
DBGFR3DisasInstrCurrentLog(pVCpu, pszPrefix);
}
#endif /* LOG_ENABLED */
#if 0
/* Try our own instruction emulator before falling back to the recompiler. */
DISCPUSTATE Cpu;
rc = CPUMR3DisasmInstrCPU(pVM, pVCpu, pCtx, pCtx->rip, &Cpu, "GEN EMU");
if (RT_SUCCESS(rc))
{
switch (Cpu.pCurInstr->uOpcode)
{
/* @todo we can do more now */
case OP_MOV:
case OP_AND:
case OP_OR:
case OP_XOR:
case OP_POP:
case OP_INC:
case OP_DEC:
case OP_XCHG:
STAM_PROFILE_START(&pVCpu->em.s.StatMiscEmu, a);
rc = EMInterpretInstructionCpuUpdtPC(pVM, pVCpu, &Cpu, CPUMCTX2CORE(pCtx), 0);
if (RT_SUCCESS(rc))
{
#ifdef EM_NOTIFY_HWACCM
if (pVCpu->em.s.enmState == EMSTATE_DEBUG_GUEST_HWACC)
HWACCMR3NotifyEmulated(pVCpu);
#endif
STAM_PROFILE_STOP(&pVCpu->em.s.StatMiscEmu, a);
return rc;
}
if (rc != VERR_EM_INTERPRETER)
AssertMsgFailedReturn(("rc=%Rrc\n", rc), rc);
STAM_PROFILE_STOP(&pVCpu->em.s.StatMiscEmu, a);
break;
}
}
#endif /* 0 */
STAM_PROFILE_START(&pVCpu->em.s.StatREMEmu, a);
Log(("EMINS: %04x:%RGv RSP=%RGv\n", pCtx->cs.Sel, (RTGCPTR)pCtx->rip, (RTGCPTR)pCtx->rsp));
#ifdef VBOX_WITH_REM
EMRemLock(pVM);
/* Flush the recompiler TLB if the VCPU has changed. */
if (pVM->em.s.idLastRemCpu != pVCpu->idCpu)
CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_ALL);
pVM->em.s.idLastRemCpu = pVCpu->idCpu;
rc = REMR3EmulateInstruction(pVM, pVCpu);
EMRemUnlock(pVM);
#else
rc = VBOXSTRICTRC_TODO(IEMExecOne(pVCpu)); NOREF(pVM);
#endif
STAM_PROFILE_STOP(&pVCpu->em.s.StatREMEmu, a);
#ifdef EM_NOTIFY_HWACCM
if (pVCpu->em.s.enmState == EMSTATE_DEBUG_GUEST_HWACC)
HWACCMR3NotifyEmulated(pVCpu);
#endif
return rc;
}
/**
* Executes one (or perhaps a few more) IO instruction(s).
*
* @returns VBox status code suitable for EM.
* @param pVM Pointer to the VM.
* @param pVCpu Pointer to the VMCPU.
*/
static int emR3ExecuteIOInstruction(PVM pVM, PVMCPU pVCpu)
{
PCPUMCTX pCtx = pVCpu->em.s.pCtx;
STAM_PROFILE_START(&pVCpu->em.s.StatIOEmu, a);
/* Try to restart the io instruction that was refused in ring-0. */
VBOXSTRICTRC rcStrict = HWACCMR3RestartPendingIOInstr(pVM, pVCpu, pCtx);
if (IOM_SUCCESS(rcStrict))
{
STAM_COUNTER_INC(&pVCpu->em.s.CTX_SUFF(pStats)->StatIoRestarted);
STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
return VBOXSTRICTRC_TODO(rcStrict); /* rip already updated. */
}
AssertMsgReturn(rcStrict == VERR_NOT_FOUND, ("%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)),
RT_SUCCESS_NP(rcStrict) ? VERR_IPE_UNEXPECTED_INFO_STATUS : VBOXSTRICTRC_TODO(rcStrict));
/** @todo probably we should fall back to the recompiler; otherwise we'll go back and forth between HC & GC
* as io instructions tend to come in packages of more than one
*/
DISCPUSTATE Cpu;
int rc2 = CPUMR3DisasmInstrCPU(pVM, pVCpu, pCtx, pCtx->rip, &Cpu, "IO EMU");
if (RT_SUCCESS(rc2))
{
rcStrict = VINF_EM_RAW_EMULATE_INSTR;
if (!(Cpu.fPrefix & (DISPREFIX_REP | DISPREFIX_REPNE)))
{
switch (Cpu.pCurInstr->uOpcode)
{
case OP_IN:
{
STAM_COUNTER_INC(&pVCpu->em.s.CTX_SUFF(pStats)->StatIn);
rcStrict = IOMInterpretIN(pVM, CPUMCTX2CORE(pCtx), &Cpu);
break;
}
case OP_OUT:
{
STAM_COUNTER_INC(&pVCpu->em.s.CTX_SUFF(pStats)->StatOut);
rcStrict = IOMInterpretOUT(pVM, CPUMCTX2CORE(pCtx), &Cpu);
break;
}
}
}
else if (Cpu.fPrefix & DISPREFIX_REP)
{
switch (Cpu.pCurInstr->uOpcode)
{
case OP_INSB:
case OP_INSWD:
{
STAM_COUNTER_INC(&pVCpu->em.s.CTX_SUFF(pStats)->StatIn);
rcStrict = IOMInterpretINS(pVM, CPUMCTX2CORE(pCtx), &Cpu);
break;
}
case OP_OUTSB:
case OP_OUTSWD:
{
STAM_COUNTER_INC(&pVCpu->em.s.CTX_SUFF(pStats)->StatOut);
rcStrict = IOMInterpretOUTS(pVM, CPUMCTX2CORE(pCtx), &Cpu);
break;
}
}
}
/*
* Handled the I/O return codes.
* (The unhandled cases end up with rcStrict == VINF_EM_RAW_EMULATE_INSTR.)
*/
if (IOM_SUCCESS(rcStrict))
{
pCtx->rip += Cpu.cbInstr;
STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
return VBOXSTRICTRC_TODO(rcStrict);
}
if (rcStrict == VINF_EM_RAW_GUEST_TRAP)
{
/* The active trap will be dispatched. */
Assert(TRPMHasTrap(pVCpu));
STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
return VINF_SUCCESS;
}
AssertMsg(rcStrict != VINF_TRPM_XCPT_DISPATCHED, ("Handle VINF_TRPM_XCPT_DISPATCHED\n"));
if (RT_FAILURE(rcStrict))
{
STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
return VBOXSTRICTRC_TODO(rcStrict);
}
AssertMsg(rcStrict == VINF_EM_RAW_EMULATE_INSTR || rcStrict == VINF_EM_RESCHEDULE_REM, ("rcStrict=%Rrc\n", VBOXSTRICTRC_VAL(rcStrict)));
}
STAM_PROFILE_STOP(&pVCpu->em.s.StatIOEmu, a);
return emR3ExecuteInstruction(pVM, pVCpu, "IO: ");
}
/**
* Executes hardware accelerated raw code. (Intel VT-x & AMD-V)
*
* This function contains the raw-mode version of the inner
* execution loop (the outer loop being in EMR3ExecuteVM()).
*
* @returns VBox status code. The most important ones are: VINF_EM_RESCHEDULE, VINF_EM_RESCHEDULE_RAW,
* VINF_EM_RESCHEDULE_REM, VINF_EM_SUSPEND, VINF_EM_RESET and VINF_EM_TERMINATE.
*
* @param pVM VM handle.
* @param pVCpu VMCPU handle.
* @param pfFFDone Where to store an indicator telling whether or not
* FFs were done before returning.
*/
int emR3HwAccExecute(PVM pVM, PVMCPU pVCpu, bool *pfFFDone)
{
int rc = VERR_IPE_UNINITIALIZED_STATUS;
PCPUMCTX pCtx = pVCpu->em.s.pCtx;
LogFlow(("emR3HwAccExecute%d: (cs:eip=%04x:%RGv)\n", pVCpu->idCpu, pCtx->cs, (RTGCPTR)pCtx->rip));
*pfFFDone = false;
STAM_COUNTER_INC(&pVCpu->em.s.StatHwAccExecuteEntry);
#ifdef EM_NOTIFY_HWACCM
HWACCMR3NotifyScheduled(pVCpu);
#endif
/*
* Spin till we get a forced action which returns anything but VINF_SUCCESS.
*/
for (;;)
{
STAM_PROFILE_ADV_START(&pVCpu->em.s.StatHwAccEntry, a);
/* Check if a forced reschedule is pending. */
if (HWACCMR3IsRescheduleRequired(pVM, pCtx))
{
rc = VINF_EM_RESCHEDULE;
break;
}
/*
* Process high priority pre-execution raw-mode FFs.
*/
VMCPU_FF_CLEAR(pVCpu, (VMCPU_FF_SELM_SYNC_GDT | VMCPU_FF_SELM_SYNC_LDT | VMCPU_FF_TRPM_SYNC_IDT | VMCPU_FF_SELM_SYNC_TSS)); /* not relevant in HWACCM mode; shouldn't be set really. */
if ( VM_FF_ISPENDING(pVM, VM_FF_HIGH_PRIORITY_PRE_RAW_MASK)
|| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_HIGH_PRIORITY_PRE_RAW_MASK))
{
rc = emR3HwaccmForcedActions(pVM, pVCpu, pCtx);
if (rc != VINF_SUCCESS)
break;
}
#ifdef LOG_ENABLED
/*
* Log important stuff before entering GC.
*/
if (TRPMHasTrap(pVCpu))
Log(("CPU%d: Pending hardware interrupt=0x%x cs:rip=%04X:%RGv\n", pVCpu->idCpu, TRPMGetTrapNo(pVCpu), pCtx->cs, (RTGCPTR)pCtx->rip));
uint32_t cpl = CPUMGetGuestCPL(pVCpu, CPUMCTX2CORE(pCtx));
if (pVM->cCpus == 1)
{
if (pCtx->eflags.Bits.u1VM)
Log(("HWV86: %08X IF=%d\n", pCtx->eip, pCtx->eflags.Bits.u1IF));
else if (CPUMIsGuestIn64BitCodeEx(pCtx))
Log(("HWR%d: %04X:%RGv ESP=%RGv IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pCtx->cs, (RTGCPTR)pCtx->rip, pCtx->rsp, pCtx->eflags.Bits.u1IF, pCtx->eflags.Bits.u2IOPL, (uint32_t)pCtx->cr0, (uint32_t)pCtx->cr4, (uint32_t)pCtx->msrEFER));
else
Log(("HWR%d: %04X:%08X ESP=%08X IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pCtx->cs, pCtx->eip, pCtx->esp, pCtx->eflags.Bits.u1IF, pCtx->eflags.Bits.u2IOPL, (uint32_t)pCtx->cr0, (uint32_t)pCtx->cr4, (uint32_t)pCtx->msrEFER));
}
else
{
if (pCtx->eflags.Bits.u1VM)
Log(("HWV86-CPU%d: %08X IF=%d\n", pVCpu->idCpu, pCtx->eip, pCtx->eflags.Bits.u1IF));
else if (CPUMIsGuestIn64BitCodeEx(pCtx))
Log(("HWR%d-CPU%d: %04X:%RGv ESP=%RGv IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->idCpu, pCtx->cs, (RTGCPTR)pCtx->rip, pCtx->rsp, pCtx->eflags.Bits.u1IF, pCtx->eflags.Bits.u2IOPL, (uint32_t)pCtx->cr0, (uint32_t)pCtx->cr4, (uint32_t)pCtx->msrEFER));
else
Log(("HWR%d-CPU%d: %04X:%08X ESP=%08X IF=%d IOPL=%d CR0=%x CR4=%x EFER=%x\n", cpl, pVCpu->idCpu, pCtx->cs, pCtx->eip, pCtx->esp, pCtx->eflags.Bits.u1IF, pCtx->eflags.Bits.u2IOPL, (uint32_t)pCtx->cr0, (uint32_t)pCtx->cr4, (uint32_t)pCtx->msrEFER));
}
#endif /* LOG_ENABLED */
/*
* Execute the code.
*/
STAM_PROFILE_ADV_STOP(&pVCpu->em.s.StatHwAccEntry, a);
if (RT_LIKELY(EMR3IsExecutionAllowed(pVM, pVCpu)))
{
STAM_PROFILE_START(&pVCpu->em.s.StatHwAccExec, x);
rc = VMMR3HwAccRunGC(pVM, pVCpu);
STAM_PROFILE_STOP(&pVCpu->em.s.StatHwAccExec, x);
}
else
{
/* Give up this time slice; virtual time continues */
STAM_REL_PROFILE_ADV_START(&pVCpu->em.s.StatCapped, u);
RTThreadSleep(5);
STAM_REL_PROFILE_ADV_STOP(&pVCpu->em.s.StatCapped, u);
rc = VINF_SUCCESS;
}
/*
* Deal with high priority post execution FFs before doing anything else.
*/
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_RESUME_GUEST_MASK);
if ( VM_FF_ISPENDING(pVM, VM_FF_HIGH_PRIORITY_POST_MASK)
|| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_HIGH_PRIORITY_POST_MASK))
rc = emR3HighPriorityPostForcedActions(pVM, pVCpu, rc);
/*
* Process the returned status code.
*/
if (rc >= VINF_EM_FIRST && rc <= VINF_EM_LAST)
break;
rc = emR3HwaccmHandleRC(pVM, pVCpu, pCtx, rc);
if (rc != VINF_SUCCESS)
break;
/*
* Check and execute forced actions.
*/
#ifdef VBOX_HIGH_RES_TIMERS_HACK
TMTimerPollVoid(pVM, pVCpu);
#endif
if ( VM_FF_ISPENDING(pVM, VM_FF_ALL_MASK)
|| VMCPU_FF_ISPENDING(pVCpu, VMCPU_FF_ALL_MASK))
{
rc = emR3ForcedActions(pVM, pVCpu, rc);
if ( rc != VINF_SUCCESS
&& rc != VINF_EM_RESCHEDULE_HWACC)
{
*pfFFDone = true;
break;
}
}
}
/*
* Return to outer loop.
*/
#if defined(LOG_ENABLED) && defined(DEBUG)
RTLogFlush(NULL);
#endif
return rc;
}