NEMR3.cpp@ 97231

Last change on this file since 97231 was 97188, checked in by vboxsync, 2 years ago
Support/SUPR3HardenedEntitlementsVM.plist,VMM/NEMR3Native-darwin: Remove the Catalina workaround, as it turns out setting the com.apple.security.cs.allow-unsigned-executable-memory and com.apple.security.cs.disable-executable-page-protection entitlements are enough to make it work, bugref:9044
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
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1	/* $Id: NEMR3.cpp 97188 2022-10-18 07:42:50Z vboxsync $ */
2	/** @file
3	* NEM - Native execution manager.
4	*/
5
6	/*
7	* Copyright (C) 2018-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	/** @page pg_nem NEM - Native Execution Manager.
29	*
30	* This is an alternative execution manage to HM and raw-mode. On one host
31	* (Windows) we're forced to use this, on the others we just do it because we
32	* can. Since this is host specific in nature, information about an
33	* implementation is contained in the NEMR3Native-xxxx.cpp files.
34	*
35	* @ref pg_nem_win
36	*/
37
38
39	/*********************************************************************************************************************************
40	* Header Files *
41	*********************************************************************************************************************************/
42	#define LOG_GROUP LOG_GROUP_NEM
43	#include <VBox/vmm/dbgf.h>
44	#include <VBox/vmm/nem.h>
45	#include <VBox/vmm/gim.h>
46	#include "NEMInternal.h"
47	#include <VBox/vmm/vm.h>
48	#include <VBox/vmm/uvm.h>
49	#include <VBox/err.h>
50
51	#include <iprt/asm.h>
52
53
54
55	/**
56	* Basic init and configuration reading.
57	*
58	* Always call NEMR3Term after calling this.
59	*
60	* @returns VBox status code.
61	* @param pVM The cross context VM structure.
62	*/
63	VMMR3_INT_DECL(int) NEMR3InitConfig(PVM pVM)
64	{
65	LogFlow(("NEMR3Init\n"));
66
67	/*
68	* Assert alignment and sizes.
69	*/
70	AssertCompileMemberAlignment(VM, nem.s, 64);
71	AssertCompile(sizeof(pVM->nem.s) <= sizeof(pVM->nem.padding));
72
73	/*
74	* Initialize state info so NEMR3Term will always be happy.
75	* No returning prior to setting magics!
76	*/
77	pVM->nem.s.u32Magic = NEM_MAGIC;
78	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
79	{
80	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
81	pVCpu->nem.s.u32Magic = NEMCPU_MAGIC;
82	}
83
84	/*
85	* Read configuration.
86	*/
87	PCFGMNODE pCfgNem = CFGMR3GetChild(CFGMR3GetRoot(pVM), "NEM/");
88
89	/*
90	* Validate the NEM settings.
91	*/
92	int rc = CFGMR3ValidateConfig(pCfgNem,
93	"/NEM/",
94	"Enabled"
95	"\|Allow64BitGuests"
96	"\|LovelyMesaDrvWorkaround"
97	#ifdef RT_OS_WINDOWS
98	"\|UseRing0Runloop"
99	#elif defined(RT_OS_DARWIN)
100	"\|VmxPleGap"
101	"\|VmxPleWindow"
102	"\|VmxLbr"
103	#endif
104	,
105	"" /* pszValidNodes /, "NEM" / pszWho /, 0 / uInstance */);
106	if (RT_FAILURE(rc))
107	return rc;
108
109	/** @cfgm{/NEM/NEMEnabled, bool, true}
110	* Whether NEM is enabled. */
111	rc = CFGMR3QueryBoolDef(pCfgNem, "Enabled", &pVM->nem.s.fEnabled, true);
112	AssertLogRelRCReturn(rc, rc);
113
114
115	#ifdef VBOX_WITH_64_BITS_GUESTS
116	/** @cfgm{/NEM/Allow64BitGuests, bool, 32-bit:false, 64-bit:true}
117	* Enables AMD64 CPU features.
118	* On 32-bit hosts this isn't default and require host CPU support. 64-bit hosts
119	* already have the support. */
120	rc = CFGMR3QueryBoolDef(pCfgNem, "Allow64BitGuests", &pVM->nem.s.fAllow64BitGuests, HC_ARCH_BITS == 64);
121	AssertLogRelRCReturn(rc, rc);
122	#else
123	pVM->nem.s.fAllow64BitGuests = false;
124	#endif
125
126	/** @cfgm{/NEM/LovelyMesaDrvWorkaround, bool, false}
127	* Workaround for mesa vmsvga 3d driver making incorrect assumptions about
128	* the hypervisor it is running under. */
129	bool f;
130	rc = CFGMR3QueryBoolDef(pCfgNem, "LovelyMesaDrvWorkaround", &f, false);
131	AssertLogRelRCReturn(rc, rc);
132	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
133	{
134	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
135	pVCpu->nem.s.fTrapXcptGpForLovelyMesaDrv = f;
136	}
137
138	return VINF_SUCCESS;
139	}
140
141
142	/**
143	* This is called by HMR3Init() when HM cannot be used.
144	*
145	* Sets VM::bMainExecutionEngine to VM_EXEC_ENGINE_NATIVE_API if we can use a
146	* native hypervisor API to execute the VM.
147	*
148	* @returns VBox status code.
149	* @param pVM The cross context VM structure.
150	* @param fFallback Whether this is a fallback call. Cleared if the VM is
151	* configured to use NEM instead of HM.
152	* @param fForced Whether /HM/HMForced was set. If set and we fail to
153	* enable NEM, we'll return a failure status code.
154	* Otherwise we'll assume HMR3Init falls back on raw-mode.
155	*/
156	VMMR3_INT_DECL(int) NEMR3Init(PVM pVM, bool fFallback, bool fForced)
157	{
158	Assert(pVM->bMainExecutionEngine != VM_EXEC_ENGINE_NATIVE_API);
159	int rc;
160	if (pVM->nem.s.fEnabled)
161	{
162	#ifdef VBOX_WITH_NATIVE_NEM
163	rc = nemR3NativeInit(pVM, fFallback, fForced);
164	ASMCompilerBarrier(); /* May have changed bMainExecutionEngine. */
165	#else
166	RT_NOREF(fFallback);
167	rc = VINF_SUCCESS;
168	#endif
169	if (RT_SUCCESS(rc))
170	{
171	if (pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
172	{
173	#ifdef RT_OS_WINDOWS /* The WHv* API is extremely slow at handling VM exits. The AppleHv and
174	KVM APIs are much faster, thus the different mode name. :-) */
175	LogRel(("NEM:\n"
176	"NEM: NEMR3Init: Snail execution mode is active!\n"
177	"NEM: Note! VirtualBox is not able to run at its full potential in this execution mode.\n"
178	"NEM: To see VirtualBox run at max speed you need to disable all Windows features\n"
179	"NEM: making use of Hyper-V. That is a moving target, so google how and carefully\n"
180	"NEM: consider the consequences of disabling these features.\n"
181	"NEM:\n"));
182	#else
183	LogRel(("NEM:\n"
184	"NEM: NEMR3Init: Turtle execution mode is active!\n"
185	"NEM: Note! VirtualBox is not able to run at its full potential in this execution mode.\n"
186	"NEM:\n"));
187	#endif
188	}
189	else
190	{
191	LogRel(("NEM: NEMR3Init: Not available.\n"));
192	if (fForced)
193	rc = VERR_NEM_NOT_AVAILABLE;
194	}
195	}
196	else
197	LogRel(("NEM: NEMR3Init: Native init failed: %Rrc.\n", rc));
198	}
199	else
200	{
201	LogRel(("NEM: NEMR3Init: Disabled.\n"));
202	rc = fForced ? VERR_NEM_NOT_ENABLED : VINF_SUCCESS;
203	}
204	return rc;
205	}
206
207
208	/**
209	* Perform initialization that depends on CPUM working.
210	*
211	* This is a noop if NEM wasn't activated by a previous NEMR3Init() call.
212	*
213	* @returns VBox status code.
214	* @param pVM The cross context VM structure.
215	*/
216	VMMR3_INT_DECL(int) NEMR3InitAfterCPUM(PVM pVM)
217	{
218	int rc = VINF_SUCCESS;
219	if (pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
220	{
221	/*
222	* Do native after-CPUM init.
223	*/
224	#ifdef VBOX_WITH_NATIVE_NEM
225	rc = nemR3NativeInitAfterCPUM(pVM);
226	#else
227	RT_NOREF(pVM);
228	#endif
229	}
230	return rc;
231	}
232
233
234	/**
235	* Called when a init phase has completed.
236	*
237	* @returns VBox status code.
238	* @param pVM The cross context VM structure.
239	* @param enmWhat The phase that completed.
240	*/
241	VMMR3_INT_DECL(int) NEMR3InitCompleted(PVM pVM, VMINITCOMPLETED enmWhat)
242	{
243	/*
244	* Check if GIM needs #UD, since that applies to everyone.
245	*/
246	if (enmWhat == VMINITCOMPLETED_RING3)
247	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
248	{
249	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
250	pVCpu->nem.s.fGIMTrapXcptUD = GIMShouldTrapXcptUD(pVCpu);
251	}
252
253	/*
254	* Call native code.
255	*/
256	int rc = VINF_SUCCESS;
257	#ifdef VBOX_WITH_NATIVE_NEM
258	if (pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
259	rc = nemR3NativeInitCompleted(pVM, enmWhat);
260	#else
261	RT_NOREF(pVM, enmWhat);
262	#endif
263	return rc;
264	}
265
266
267	/**
268	*
269	* @returns VBox status code.
270	* @param pVM The cross context VM structure.
271	*/
272	VMMR3_INT_DECL(int) NEMR3Term(PVM pVM)
273	{
274	AssertReturn(pVM->nem.s.u32Magic == NEM_MAGIC, VERR_WRONG_ORDER);
275	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
276	AssertReturn(pVM->apCpusR3[idCpu]->nem.s.u32Magic == NEMCPU_MAGIC, VERR_WRONG_ORDER);
277
278	/* Do native termination. */
279	int rc = VINF_SUCCESS;
280	#ifdef VBOX_WITH_NATIVE_NEM
281	if (pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
282	rc = nemR3NativeTerm(pVM);
283	#endif
284
285	/* Mark it as terminated. */
286	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
287	{
288	PVMCPU pVCpu = pVM->apCpusR3[idCpu];
289	pVCpu->nem.s.u32Magic = NEMCPU_MAGIC_DEAD;
290	}
291	pVM->nem.s.u32Magic = NEM_MAGIC_DEAD;
292	return rc;
293	}
294
295	/**
296	* External interface for querying whether native execution API is used.
297	*
298	* @returns true if NEM is being used, otherwise false.
299	* @param pUVM The user mode VM handle.
300	* @sa HMR3IsEnabled
301	*/
302	VMMR3DECL(bool) NEMR3IsEnabled(PUVM pUVM)
303	{
304	UVM_ASSERT_VALID_EXT_RETURN(pUVM, false);
305	PVM pVM = pUVM->pVM;
306	VM_ASSERT_VALID_EXT_RETURN(pVM, false);
307	return VM_IS_NEM_ENABLED(pVM);
308	}
309
310
311	/**
312	* The VM is being reset.
313	*
314	* @param pVM The cross context VM structure.
315	*/
316	VMMR3_INT_DECL(void) NEMR3Reset(PVM pVM)
317	{
318	#ifdef VBOX_WITH_NATIVE_NEM
319	if (pVM->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
320	nemR3NativeReset(pVM);
321	#else
322	RT_NOREF(pVM);
323	#endif
324	}
325
326
327	/**
328	* Resets a virtual CPU.
329	*
330	* Used to bring up secondary CPUs on SMP as well as CPU hot plugging.
331	*
332	* @param pVCpu The cross context virtual CPU structure to reset.
333	* @param fInitIpi Set if being reset due to INIT IPI.
334	*/
335	VMMR3_INT_DECL(void) NEMR3ResetCpu(PVMCPU pVCpu, bool fInitIpi)
336	{
337	#ifdef VBOX_WITH_NATIVE_NEM
338	if (pVCpu->pVMR3->bMainExecutionEngine == VM_EXEC_ENGINE_NATIVE_API)
339	nemR3NativeResetCpu(pVCpu, fInitIpi);
340	#else
341	RT_NOREF(pVCpu, fInitIpi);
342	#endif
343	}
344
345
346	/**
347	* Indicates to TM that TMTSCMODE_NATIVE_API should be used for TSC.
348	*
349	* @returns true if TMTSCMODE_NATIVE_API must be used, otherwise @c false.
350	* @param pVM The cross context VM structure.
351	*/
352	VMMR3_INT_DECL(bool) NEMR3NeedSpecialTscMode(PVM pVM)
353	{
354	#ifdef VBOX_WITH_NATIVE_NEM
355	if (VM_IS_NEM_ENABLED(pVM))
356	return true;
357	#else
358	RT_NOREF(pVM);
359	#endif
360	return false;
361	}
362
363
364	/**
365	* Gets the name of a generic NEM exit code.
366	*
367	* @returns Pointer to read only string if @a uExit is known, otherwise NULL.
368	* @param uExit The NEM exit to name.
369	*/
370	VMMR3DECL(const char *) NEMR3GetExitName(uint32_t uExit)
371	{
372	switch ((NEMEXITTYPE)uExit)
373	{
374	case NEMEXITTYPE_INTTERRUPT_WINDOW: return "NEM interrupt window";
375	case NEMEXITTYPE_HALT: return "NEM halt";
376
377	case NEMEXITTYPE_UNRECOVERABLE_EXCEPTION: return "NEM unrecoverable exception";
378	case NEMEXITTYPE_INVALID_VP_REGISTER_VALUE: return "NEM invalid vp register value";
379	case NEMEXITTYPE_XCPT_UD: return "NEM #UD";
380	case NEMEXITTYPE_XCPT_DB: return "NEM #DB";
381	case NEMEXITTYPE_XCPT_BP: return "NEM #BP";
382	case NEMEXITTYPE_CANCELED: return "NEM canceled";
383	case NEMEXITTYPE_MEMORY_ACCESS: return "NEM memory access";
384
385	case NEMEXITTYPE_INTERNAL_ERROR_EMULATION: return "NEM emulation IPE";
386	case NEMEXITTYPE_INTERNAL_ERROR_FATAL: return "NEM fatal IPE";
387	case NEMEXITTYPE_INTERRUPTED: return "NEM interrupted";
388	case NEMEXITTYPE_FAILED_ENTRY: return "NEM failed VT-x/AMD-V entry";
389
390	case NEMEXITTYPE_INVALID:
391	case NEMEXITTYPE_END:
392	break;
393	}
394
395	return NULL;
396	}
397
398
399	VMMR3_INT_DECL(VBOXSTRICTRC) NEMR3RunGC(PVM pVM, PVMCPU pVCpu)
400	{
401	Assert(VM_IS_NEM_ENABLED(pVM));
402	#ifdef VBOX_WITH_NATIVE_NEM
403	return nemR3NativeRunGC(pVM, pVCpu);
404	#else
405	NOREF(pVM); NOREF(pVCpu);
406	return VERR_INTERNAL_ERROR_3;
407	#endif
408	}
409
410
411	#ifndef VBOX_WITH_NATIVE_NEM
412	VMMR3_INT_DECL(bool) NEMR3CanExecuteGuest(PVM pVM, PVMCPU pVCpu)
413	{
414	RT_NOREF(pVM, pVCpu);
415	return false;
416	}
417	#endif
418
419
420	VMMR3_INT_DECL(bool) NEMR3SetSingleInstruction(PVM pVM, PVMCPU pVCpu, bool fEnable)
421	{
422	Assert(VM_IS_NEM_ENABLED(pVM));
423	#ifdef VBOX_WITH_NATIVE_NEM
424	return nemR3NativeSetSingleInstruction(pVM, pVCpu, fEnable);
425	#else
426	NOREF(pVM); NOREF(pVCpu); NOREF(fEnable);
427	return false;
428	#endif
429	}
430
431
432	VMMR3_INT_DECL(void) NEMR3NotifyFF(PVM pVM, PVMCPU pVCpu, uint32_t fFlags)
433	{
434	AssertLogRelReturnVoid(VM_IS_NEM_ENABLED(pVM));
435	#ifdef VBOX_WITH_NATIVE_NEM
436	nemR3NativeNotifyFF(pVM, pVCpu, fFlags);
437	#else
438	RT_NOREF(pVM, pVCpu, fFlags);
439	#endif
440	}
441
442	#ifndef VBOX_WITH_NATIVE_NEM
443
444	VMMR3_INT_DECL(void) NEMR3NotifySetA20(PVMCPU pVCpu, bool fEnabled)
445	{
446	RT_NOREF(pVCpu, fEnabled);
447	}
448
449	# ifdef VBOX_WITH_PGM_NEM_MODE
450
451	VMMR3_INT_DECL(bool) NEMR3IsMmio2DirtyPageTrackingSupported(PVM pVM)
452	{
453	RT_NOREF(pVM);
454	return false;
455	}
456
457
458	VMMR3_INT_DECL(int) NEMR3PhysMmio2QueryAndResetDirtyBitmap(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t uNemRange,
459	void *pvBitmap, size_t cbBitmap)
460	{
461	RT_NOREF(pVM, GCPhys, cb, uNemRange, pvBitmap, cbBitmap);
462	AssertFailed();
463	return VERR_INTERNAL_ERROR_2;
464	}
465
466
467	VMMR3_INT_DECL(int) NEMR3NotifyPhysMmioExMapEarly(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, uint32_t fFlags,
468	void pvRam, void pvMmio2, uint8_t pu2State, uint32_t puNemRange)
469	{
470	RT_NOREF(pVM, GCPhys, cb, fFlags, pvRam, pvMmio2, pu2State, puNemRange);
471	AssertFailed();
472	return VERR_INTERNAL_ERROR_2;
473	}
474
475	# endif /* VBOX_WITH_PGM_NEM_MODE */
476	#endif /* !VBOX_WITH_NATIVE_NEM */
477
478	/**
479	* Notification callback from DBGF when interrupt breakpoints or generic debug
480	* event settings changes.
481	*
482	* DBGF will call NEMR3NotifyDebugEventChangedPerCpu on each CPU afterwards, this
483	* function is just updating the VM globals.
484	*
485	* @param pVM The VM cross context VM structure.
486	* @thread EMT(0)
487	*/
488	VMMR3_INT_DECL(void) NEMR3NotifyDebugEventChanged(PVM pVM)
489	{
490	AssertLogRelReturnVoid(VM_IS_NEM_ENABLED(pVM));
491
492	#ifdef VBOX_WITH_NATIVE_NEM
493	/* Interrupts. */
494	bool fUseDebugLoop = pVM->dbgf.ro.cSoftIntBreakpoints > 0
495	\|\| pVM->dbgf.ro.cHardIntBreakpoints > 0;
496
497	/* CPU Exceptions. */
498	for (DBGFEVENTTYPE enmEvent = DBGFEVENT_XCPT_FIRST;
499	!fUseDebugLoop && enmEvent <= DBGFEVENT_XCPT_LAST;
500	enmEvent = (DBGFEVENTTYPE)(enmEvent + 1))
501	fUseDebugLoop = DBGF_IS_EVENT_ENABLED(pVM, enmEvent);
502
503	/* Common VM exits. */
504	for (DBGFEVENTTYPE enmEvent = DBGFEVENT_EXIT_FIRST;
505	!fUseDebugLoop && enmEvent <= DBGFEVENT_EXIT_LAST_COMMON;
506	enmEvent = (DBGFEVENTTYPE)(enmEvent + 1))
507	fUseDebugLoop = DBGF_IS_EVENT_ENABLED(pVM, enmEvent);
508
509	/* Done. */
510	pVM->nem.s.fUseDebugLoop = nemR3NativeNotifyDebugEventChanged(pVM, fUseDebugLoop);
511	#else
512	RT_NOREF(pVM);
513	#endif
514	}
515
516
517	/**
518	* Follow up notification callback to NEMR3NotifyDebugEventChanged for each CPU.
519	*
520	* NEM uses this to combine the decision made NEMR3NotifyDebugEventChanged with
521	* per CPU settings.
522	*
523	* @param pVM The VM cross context VM structure.
524	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
525	*/
526	VMMR3_INT_DECL(void) NEMR3NotifyDebugEventChangedPerCpu(PVM pVM, PVMCPU pVCpu)
527	{
528	AssertLogRelReturnVoid(VM_IS_NEM_ENABLED(pVM));
529
530	#ifdef VBOX_WITH_NATIVE_NEM
531	pVCpu->nem.s.fUseDebugLoop = nemR3NativeNotifyDebugEventChangedPerCpu(pVM, pVCpu,
532	pVCpu->nem.s.fSingleInstruction \| pVM->nem.s.fUseDebugLoop);
533	#else
534	RT_NOREF(pVM, pVCpu);
535	#endif
536	}

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source: vbox/trunk/src/VBox/VMM/VMMR3/NEMR3.cpp@ 97231

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