HMR0.cpp@ 97229

Last change on this file since 97229 was 97229, checked in by vboxsync, 2 years ago
VMM/HM: Access CPUMCTX::eflags via the 'u' member when possible in preparation for putting internal info in the reserved bits.
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1	/* $Id: HMR0.cpp 97229 2022-10-18 22:59:32Z vboxsync $ */
2	/** @file
3	* Hardware Assisted Virtualization Manager (HM) - Host Context Ring-0.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 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
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_HM
33	#define VMCPU_INCL_CPUM_GST_CTX
34	#include <VBox/vmm/hm.h>
35	#include <VBox/vmm/pgm.h>
36	#include "HMInternal.h"
37	#include <VBox/vmm/vmcc.h>
38	#include <VBox/vmm/hm_svm.h>
39	#include <VBox/vmm/hmvmxinline.h>
40	#include <VBox/err.h>
41	#include <VBox/log.h>
42	#include <iprt/assert.h>
43	#include <iprt/asm.h>
44	#include <iprt/asm-amd64-x86.h>
45	#include <iprt/cpuset.h>
46	#include <iprt/mem.h>
47	#include <iprt/memobj.h>
48	#include <iprt/once.h>
49	#include <iprt/param.h>
50	#include <iprt/power.h>
51	#include <iprt/string.h>
52	#include <iprt/thread.h>
53	#include <iprt/x86.h>
54	#include "HMVMXR0.h"
55	#include "HMSVMR0.h"
56
57
58	/*********************************************************************************************************************************
59	* Internal Functions *
60	*********************************************************************************************************************************/
61	static DECLCALLBACK(void) hmR0EnableCpuCallback(RTCPUID idCpu, void pvUser1, void pvUser2);
62	static DECLCALLBACK(void) hmR0DisableCpuCallback(RTCPUID idCpu, void pvUser1, void pvUser2);
63	static DECLCALLBACK(void) hmR0PowerCallback(RTPOWEREVENT enmEvent, void *pvUser);
64	static DECLCALLBACK(void) hmR0MpEventCallback(RTMPEVENT enmEvent, RTCPUID idCpu, void *pvData);
65
66
67	/*********************************************************************************************************************************
68	* Structures and Typedefs *
69	*********************************************************************************************************************************/
70	/**
71	* This is used to manage the status code of a RTMpOnAll in HM.
72	*/
73	typedef struct HMR0FIRSTRC
74	{
75	/** The status code. */
76	int32_t volatile rc;
77	/** The ID of the CPU reporting the first failure. */
78	RTCPUID volatile idCpu;
79	} HMR0FIRSTRC;
80	/** Pointer to a first return code structure. */
81	typedef HMR0FIRSTRC *PHMR0FIRSTRC;
82
83	/**
84	* Ring-0 method table for AMD-V and VT-x specific operations.
85	*/
86	typedef struct HMR0VTABLE
87	{
88	DECLR0CALLBACKMEMBER(int, pfnEnterSession, (PVMCPUCC pVCpu));
89	DECLR0CALLBACKMEMBER(void, pfnThreadCtxCallback, (RTTHREADCTXEVENT enmEvent, PVMCPUCC pVCpu, bool fGlobalInit));
90	DECLR0CALLBACKMEMBER(int, pfnAssertionCallback, (PVMCPUCC pVCpu));
91	DECLR0CALLBACKMEMBER(int, pfnExportHostState, (PVMCPUCC pVCpu));
92	DECLR0CALLBACKMEMBER(VBOXSTRICTRC, pfnRunGuestCode, (PVMCPUCC pVCpu));
93	DECLR0CALLBACKMEMBER(int, pfnEnableCpu, (PHMPHYSCPU pHostCpu, PVMCC pVM, void *pvCpuPage, RTHCPHYS HCPhysCpuPage,
94	bool fEnabledByHost, PCSUPHWVIRTMSRS pHwvirtMsrs));
95	DECLR0CALLBACKMEMBER(int, pfnDisableCpu, (PHMPHYSCPU pHostCpu, void *pvCpuPage, RTHCPHYS HCPhysCpuPage));
96	DECLR0CALLBACKMEMBER(int, pfnInitVM, (PVMCC pVM));
97	DECLR0CALLBACKMEMBER(int, pfnTermVM, (PVMCC pVM));
98	DECLR0CALLBACKMEMBER(int, pfnSetupVM, (PVMCC pVM));
99	} HMR0VTABLE;
100
101
102	/*********************************************************************************************************************************
103	* Global Variables *
104	*********************************************************************************************************************************/
105	/** The active ring-0 HM operations (copied from one of the table at init). */
106	static HMR0VTABLE g_HmR0Ops;
107	/** Indicates whether the host is suspending or not. We'll refuse a few
108	* actions when the host is being suspended to speed up the suspending and
109	* avoid trouble. */
110	static bool volatile g_fHmSuspended;
111	/** If set, VT-x/AMD-V is enabled globally at init time, otherwise it's
112	* enabled and disabled each time it's used to execute guest code. */
113	static bool g_fHmGlobalInit;
114	/** Host kernel flags that HM might need to know (SUPKERNELFEATURES_XXX). */
115	uint32_t g_fHmHostKernelFeatures;
116	/** Maximum allowed ASID/VPID (inclusive).
117	* @todo r=bird: This is exclusive for VT-x according to source code comment.
118	* Couldn't immediately find any docs on AMD-V, but suspect it is
119	* exclusive there as well given how hmR0SvmFlushTaggedTlb() use it. */
120	uint32_t g_uHmMaxAsid;
121
122
123	/** Set if VT-x (VMX) is supported by the CPU. */
124	bool g_fHmVmxSupported = false;
125	/** VMX: Whether we're using the preemption timer or not. */
126	bool g_fHmVmxUsePreemptTimer;
127	/** VMX: The shift mask employed by the VMX-Preemption timer. */
128	uint8_t g_cHmVmxPreemptTimerShift;
129	/** VMX: Set if swapping EFER is supported. */
130	bool g_fHmVmxSupportsVmcsEfer = false;
131	/** VMX: Whether we're using SUPR0EnableVTx or not. */
132	static bool g_fHmVmxUsingSUPR0EnableVTx = false;
133	/** VMX: Set if we've called SUPR0EnableVTx(true) and should disable it during
134	* module termination. */
135	static bool g_fHmVmxCalledSUPR0EnableVTx = false;
136	/** VMX: Host CR4 value (set by ring-0 VMX init) */
137	uint64_t g_uHmVmxHostCr4;
138	/** VMX: Host EFER value (set by ring-0 VMX init) */
139	uint64_t g_uHmVmxHostMsrEfer;
140	/** VMX: Host SMM monitor control (used for logging/diagnostics) */
141	uint64_t g_uHmVmxHostSmmMonitorCtl;
142
143
144	/** Set if AMD-V is supported by the CPU. */
145	bool g_fHmSvmSupported = false;
146	/** SVM revision. */
147	uint32_t g_uHmSvmRev;
148	/** SVM feature bits from cpuid 0x8000000a */
149	uint32_t g_fHmSvmFeatures;
150
151
152	/** MSRs. */
153	SUPHWVIRTMSRS g_HmMsrs;
154
155	/** Last recorded error code during HM ring-0 init. */
156	static int32_t g_rcHmInit = VINF_SUCCESS;
157
158	/** Per CPU globals. */
159	static HMPHYSCPU g_aHmCpuInfo[RTCPUSET_MAX_CPUS];
160
161	/** Whether we've already initialized all CPUs.
162	* @remarks We could check the EnableAllCpusOnce state, but this is
163	* simpler and hopefully easier to understand. */
164	static bool g_fHmEnabled = false;
165	/** Serialize initialization in HMR0EnableAllCpus. */
166	static RTONCE g_HmEnableAllCpusOnce = RTONCE_INITIALIZER;
167
168
169	/** HM ring-0 operations for VT-x. */
170	static HMR0VTABLE const g_HmR0OpsVmx =
171	{
172	/* .pfnEnterSession = */ VMXR0Enter,
173	/* .pfnThreadCtxCallback = */ VMXR0ThreadCtxCallback,
174	/* .pfnAssertionCallback = */ VMXR0AssertionCallback,
175	/* .pfnExportHostState = */ VMXR0ExportHostState,
176	/* .pfnRunGuestCode = */ VMXR0RunGuestCode,
177	/* .pfnEnableCpu = */ VMXR0EnableCpu,
178	/* .pfnDisableCpu = */ VMXR0DisableCpu,
179	/* .pfnInitVM = */ VMXR0InitVM,
180	/* .pfnTermVM = */ VMXR0TermVM,
181	/* .pfnSetupVM = */ VMXR0SetupVM,
182	};
183
184	/** HM ring-0 operations for AMD-V. */
185	static HMR0VTABLE const g_HmR0OpsSvm =
186	{
187	/* .pfnEnterSession = */ SVMR0Enter,
188	/* .pfnThreadCtxCallback = */ SVMR0ThreadCtxCallback,
189	/* .pfnAssertionCallback = */ SVMR0AssertionCallback,
190	/* .pfnExportHostState = */ SVMR0ExportHostState,
191	/* .pfnRunGuestCode = */ SVMR0RunGuestCode,
192	/* .pfnEnableCpu = */ SVMR0EnableCpu,
193	/* .pfnDisableCpu = */ SVMR0DisableCpu,
194	/* .pfnInitVM = */ SVMR0InitVM,
195	/* .pfnTermVM = */ SVMR0TermVM,
196	/* .pfnSetupVM = */ SVMR0SetupVM,
197	};
198
199
200	/** @name Dummy callback handlers for when neither VT-x nor AMD-V is supported.
201	* @{ */
202
203	static DECLCALLBACK(int) hmR0DummyEnter(PVMCPUCC pVCpu)
204	{
205	RT_NOREF(pVCpu);
206	return VINF_SUCCESS;
207	}
208
209	static DECLCALLBACK(void) hmR0DummyThreadCtxCallback(RTTHREADCTXEVENT enmEvent, PVMCPUCC pVCpu, bool fGlobalInit)
210	{
211	RT_NOREF(enmEvent, pVCpu, fGlobalInit);
212	}
213
214	static DECLCALLBACK(int) hmR0DummyEnableCpu(PHMPHYSCPU pHostCpu, PVMCC pVM, void *pvCpuPage, RTHCPHYS HCPhysCpuPage,
215	bool fEnabledBySystem, PCSUPHWVIRTMSRS pHwvirtMsrs)
216	{
217	RT_NOREF(pHostCpu, pVM, pvCpuPage, HCPhysCpuPage, fEnabledBySystem, pHwvirtMsrs);
218	return VINF_SUCCESS;
219	}
220
221	static DECLCALLBACK(int) hmR0DummyDisableCpu(PHMPHYSCPU pHostCpu, void *pvCpuPage, RTHCPHYS HCPhysCpuPage)
222	{
223	RT_NOREF(pHostCpu, pvCpuPage, HCPhysCpuPage);
224	return VINF_SUCCESS;
225	}
226
227	static DECLCALLBACK(int) hmR0DummyInitVM(PVMCC pVM)
228	{
229	RT_NOREF(pVM);
230	return VINF_SUCCESS;
231	}
232
233	static DECLCALLBACK(int) hmR0DummyTermVM(PVMCC pVM)
234	{
235	RT_NOREF(pVM);
236	return VINF_SUCCESS;
237	}
238
239	static DECLCALLBACK(int) hmR0DummySetupVM(PVMCC pVM)
240	{
241	RT_NOREF(pVM);
242	return VINF_SUCCESS;
243	}
244
245	static DECLCALLBACK(int) hmR0DummyAssertionCallback(PVMCPUCC pVCpu)
246	{
247	RT_NOREF(pVCpu);
248	return VINF_SUCCESS;
249	}
250
251	static DECLCALLBACK(VBOXSTRICTRC) hmR0DummyRunGuestCode(PVMCPUCC pVCpu)
252	{
253	RT_NOREF(pVCpu);
254	return VERR_NOT_SUPPORTED;
255	}
256
257	static DECLCALLBACK(int) hmR0DummyExportHostState(PVMCPUCC pVCpu)
258	{
259	RT_NOREF(pVCpu);
260	return VINF_SUCCESS;
261	}
262
263	/** Dummy ops. */
264	static HMR0VTABLE const g_HmR0OpsDummy =
265	{
266	/* .pfnEnterSession = */ hmR0DummyEnter,
267	/* .pfnThreadCtxCallback = */ hmR0DummyThreadCtxCallback,
268	/* .pfnAssertionCallback = */ hmR0DummyAssertionCallback,
269	/* .pfnExportHostState = */ hmR0DummyExportHostState,
270	/* .pfnRunGuestCode = */ hmR0DummyRunGuestCode,
271	/* .pfnEnableCpu = */ hmR0DummyEnableCpu,
272	/* .pfnDisableCpu = */ hmR0DummyDisableCpu,
273	/* .pfnInitVM = */ hmR0DummyInitVM,
274	/* .pfnTermVM = */ hmR0DummyTermVM,
275	/* .pfnSetupVM = */ hmR0DummySetupVM,
276	};
277
278	/** @} */
279
280
281	/**
282	* Initializes a first return code structure.
283	*
284	* @param pFirstRc The structure to init.
285	*/
286	static void hmR0FirstRcInit(PHMR0FIRSTRC pFirstRc)
287	{
288	pFirstRc->rc = VINF_SUCCESS;
289	pFirstRc->idCpu = NIL_RTCPUID;
290	}
291
292
293	/**
294	* Try set the status code (success ignored).
295	*
296	* @param pFirstRc The first return code structure.
297	* @param rc The status code.
298	*/
299	static void hmR0FirstRcSetStatus(PHMR0FIRSTRC pFirstRc, int rc)
300	{
301	if ( RT_FAILURE(rc)
302	&& ASMAtomicCmpXchgS32(&pFirstRc->rc, rc, VINF_SUCCESS))
303	pFirstRc->idCpu = RTMpCpuId();
304	}
305
306
307	/**
308	* Get the status code of a first return code structure.
309	*
310	* @returns The status code; VINF_SUCCESS or error status, no informational or
311	* warning errors.
312	* @param pFirstRc The first return code structure.
313	*/
314	static int hmR0FirstRcGetStatus(PHMR0FIRSTRC pFirstRc)
315	{
316	return pFirstRc->rc;
317	}
318
319
320	#ifdef VBOX_STRICT
321	# ifndef DEBUG_bird
322	/**
323	* Get the CPU ID on which the failure status code was reported.
324	*
325	* @returns The CPU ID, NIL_RTCPUID if no failure was reported.
326	* @param pFirstRc The first return code structure.
327	*/
328	static RTCPUID hmR0FirstRcGetCpuId(PHMR0FIRSTRC pFirstRc)
329	{
330	return pFirstRc->idCpu;
331	}
332	# endif
333	#endif /* VBOX_STRICT */
334
335
336
337	/**
338	* Worker function used by hmR0PowerCallback() and HMR0Init() to initalize VT-x
339	* on a CPU.
340	*
341	* @param idCpu The identifier for the CPU the function is called on.
342	* @param pvUser1 Pointer to the first RC structure.
343	* @param pvUser2 Ignored.
344	*/
345	static DECLCALLBACK(void) hmR0InitIntelCpu(RTCPUID idCpu, void pvUser1, void pvUser2)
346	{
347	PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser1;
348	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
349	Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */
350	NOREF(idCpu); NOREF(pvUser2);
351
352	int rc = SUPR0GetVmxUsability(NULL /* pfIsSmxModeAmbiguous */);
353	hmR0FirstRcSetStatus(pFirstRc, rc);
354	}
355
356
357	/**
358	* Intel specific initialization code.
359	*
360	* @returns VBox status code (will only fail if out of memory).
361	*/
362	static int hmR0InitIntel(void)
363	{
364	/* Read this MSR now as it may be useful for error reporting when initializing VT-x fails. */
365	g_HmMsrs.u.vmx.u64FeatCtrl = ASMRdMsr(MSR_IA32_FEATURE_CONTROL);
366
367	/*
368	* First try use native kernel API for controlling VT-x.
369	* (This is only supported by some Mac OS X kernels atm.)
370	*/
371	int rc;
372	g_rcHmInit = rc = SUPR0EnableVTx(true /* fEnable */);
373	g_fHmVmxUsingSUPR0EnableVTx = rc != VERR_NOT_SUPPORTED;
374	if (g_fHmVmxUsingSUPR0EnableVTx)
375	{
376	AssertLogRelMsg(rc == VINF_SUCCESS \|\| rc == VERR_VMX_IN_VMX_ROOT_MODE \|\| rc == VERR_VMX_NO_VMX, ("%Rrc\n", rc));
377	if (RT_SUCCESS(rc))
378	{
379	g_fHmVmxSupported = true;
380	rc = SUPR0EnableVTx(false /* fEnable */);
381	AssertLogRelRC(rc);
382	rc = VINF_SUCCESS;
383	}
384	}
385	else
386	{
387	HMR0FIRSTRC FirstRc;
388	hmR0FirstRcInit(&FirstRc);
389	g_rcHmInit = rc = RTMpOnAll(hmR0InitIntelCpu, &FirstRc, NULL);
390	if (RT_SUCCESS(rc))
391	g_rcHmInit = rc = hmR0FirstRcGetStatus(&FirstRc);
392	}
393
394	if (RT_SUCCESS(rc))
395	{
396	/* Read CR4 and EFER for logging/diagnostic purposes. */
397	g_uHmVmxHostCr4 = ASMGetCR4();
398	g_uHmVmxHostMsrEfer = ASMRdMsr(MSR_K6_EFER);
399
400	/* Get VMX MSRs (and feature control MSR) for determining VMX features we can ultimately use. */
401	SUPR0GetHwvirtMsrs(&g_HmMsrs, SUPVTCAPS_VT_X, false /* fForce */);
402
403	/*
404	* Nested KVM workaround: Intel SDM section 34.15.5 describes that
405	* MSR_IA32_SMM_MONITOR_CTL depends on bit 49 of MSR_IA32_VMX_BASIC while
406	* table 35-2 says that this MSR is available if either VMX or SMX is supported.
407	*/
408	uint64_t const uVmxBasicMsr = g_HmMsrs.u.vmx.u64Basic;
409	if (RT_BF_GET(uVmxBasicMsr, VMX_BF_BASIC_DUAL_MON))
410	g_uHmVmxHostSmmMonitorCtl = ASMRdMsr(MSR_IA32_SMM_MONITOR_CTL);
411
412	/* Initialize VPID - 16 bits ASID. */
413	g_uHmMaxAsid = 0x10000; /* exclusive */
414
415	/*
416	* If the host OS has not enabled VT-x for us, try enter VMX root mode
417	* to really verify if VT-x is usable.
418	*/
419	if (!g_fHmVmxUsingSUPR0EnableVTx)
420	{
421	/* Allocate a temporary VMXON region. */
422	RTR0MEMOBJ hScatchMemObj;
423	rc = RTR0MemObjAllocCont(&hScatchMemObj, HOST_PAGE_SIZE, false /* fExecutable */);
424	if (RT_FAILURE(rc))
425	{
426	LogRel(("hmR0InitIntel: RTR0MemObjAllocCont(,HOST_PAGE_SIZE,false) -> %Rrc\n", rc));
427	return rc;
428	}
429	void *pvScatchPage = RTR0MemObjAddress(hScatchMemObj);
430	RTHCPHYS const HCPhysScratchPage = RTR0MemObjGetPagePhysAddr(hScatchMemObj, 0);
431	RT_BZERO(pvScatchPage, HOST_PAGE_SIZE);
432
433	/* Set revision dword at the beginning of the VMXON structure. */
434	(uint32_t )pvScatchPage = RT_BF_GET(uVmxBasicMsr, VMX_BF_BASIC_VMCS_ID);
435
436	/* Make sure we don't get rescheduled to another CPU during this probe. */
437	RTCCUINTREG const fEFlags = ASMIntDisableFlags();
438
439	/* Enable CR4.VMXE if it isn't already set. */
440	RTCCUINTREG const uOldCr4 = SUPR0ChangeCR4(X86_CR4_VMXE, RTCCUINTREG_MAX);
441
442	/*
443	* The only way of checking if we're in VMX root mode or not is to try and enter it.
444	* There is no instruction or control bit that tells us if we're in VMX root mode.
445	* Therefore, try and enter VMX root mode here.
446	*/
447	rc = VMXEnable(HCPhysScratchPage);
448	if (RT_SUCCESS(rc))
449	{
450	g_fHmVmxSupported = true;
451	VMXDisable();
452	}
453	else
454	{
455	/*
456	* KVM leaves the CPU in VMX root mode. Not only is this not allowed,
457	* it will crash the host when we enter raw mode, because:
458	*
459	* (a) clearing X86_CR4_VMXE in CR4 causes a #GP (we no longer modify
460	* this bit), and
461	* (b) turning off paging causes a #GP (unavoidable when switching
462	* from long to 32 bits mode or 32 bits to PAE).
463	*
464	* They should fix their code, but until they do we simply refuse to run.
465	*/
466	g_rcHmInit = VERR_VMX_IN_VMX_ROOT_MODE;
467	Assert(g_fHmVmxSupported == false);
468	}
469
470	/* Restore CR4.VMXE if it wasn't set prior to us setting it above. */
471	if (!(uOldCr4 & X86_CR4_VMXE))
472	SUPR0ChangeCR4(0 /* fOrMask */, ~(uint64_t)X86_CR4_VMXE);
473
474	/* Restore interrupts. */
475	ASMSetFlags(fEFlags);
476
477	RTR0MemObjFree(hScatchMemObj, false);
478	}
479
480	if (g_fHmVmxSupported)
481	{
482	rc = VMXR0GlobalInit();
483	if (RT_SUCCESS(rc))
484	{
485	/*
486	* Install the VT-x methods.
487	*/
488	g_HmR0Ops = g_HmR0OpsVmx;
489
490	/*
491	* Check for the VMX-Preemption Timer and adjust for the "VMX-Preemption
492	* Timer Does Not Count Down at the Rate Specified" CPU erratum.
493	*/
494	if (g_HmMsrs.u.vmx.PinCtls.n.allowed1 & VMX_PIN_CTLS_PREEMPT_TIMER)
495	{
496	g_fHmVmxUsePreemptTimer = true;
497	g_cHmVmxPreemptTimerShift = RT_BF_GET(g_HmMsrs.u.vmx.u64Misc, VMX_BF_MISC_PREEMPT_TIMER_TSC);
498	if (HMIsSubjectToVmxPreemptTimerErratum())
499	g_cHmVmxPreemptTimerShift = 0; /* This is about right most of the time here. */
500	}
501	else
502	g_fHmVmxUsePreemptTimer = false;
503
504	/*
505	* Check for EFER swapping support.
506	*/
507	g_fHmVmxSupportsVmcsEfer = (g_HmMsrs.u.vmx.EntryCtls.n.allowed1 & VMX_ENTRY_CTLS_LOAD_EFER_MSR)
508	&& (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_LOAD_EFER_MSR)
509	&& (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_SAVE_EFER_MSR);
510	}
511	else
512	{
513	g_rcHmInit = rc;
514	g_fHmVmxSupported = false;
515	}
516	}
517	}
518	#ifdef LOG_ENABLED
519	else
520	SUPR0Printf("hmR0InitIntelCpu failed with rc=%Rrc\n", g_rcHmInit);
521	#endif
522	return VINF_SUCCESS;
523	}
524
525
526	/**
527	* Worker function used by hmR0PowerCallback() and HMR0Init() to initalize AMD-V
528	* on a CPU.
529	*
530	* @param idCpu The identifier for the CPU the function is called on.
531	* @param pvUser1 Pointer to the first RC structure.
532	* @param pvUser2 Ignored.
533	*/
534	static DECLCALLBACK(void) hmR0InitAmdCpu(RTCPUID idCpu, void pvUser1, void pvUser2)
535	{
536	PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser1;
537	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
538	Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */
539	NOREF(idCpu); NOREF(pvUser2);
540
541	int rc = SUPR0GetSvmUsability(true /* fInitSvm */);
542	hmR0FirstRcSetStatus(pFirstRc, rc);
543	}
544
545
546	/**
547	* AMD-specific initialization code.
548	*
549	* @returns VBox status code (will only fail if out of memory).
550	*/
551	static int hmR0InitAmd(void)
552	{
553	/* Call the global AMD-V initialization routine (should only fail in out-of-memory situations). */
554	int rc = SVMR0GlobalInit();
555	if (RT_SUCCESS(rc))
556	{
557	/*
558	* Install the AMD-V methods.
559	*/
560	g_HmR0Ops = g_HmR0OpsSvm;
561
562	/* Query AMD features. */
563	uint32_t u32Dummy;
564	ASMCpuId(0x8000000a, &g_uHmSvmRev, &g_uHmMaxAsid, &u32Dummy, &g_fHmSvmFeatures);
565
566	/*
567	* We need to check if AMD-V has been properly initialized on all CPUs.
568	* Some BIOSes might do a poor job.
569	*/
570	HMR0FIRSTRC FirstRc;
571	hmR0FirstRcInit(&FirstRc);
572	rc = RTMpOnAll(hmR0InitAmdCpu, &FirstRc, NULL);
573	AssertRC(rc);
574	if (RT_SUCCESS(rc))
575	rc = hmR0FirstRcGetStatus(&FirstRc);
576	#ifndef DEBUG_bird
577	AssertMsg(rc == VINF_SUCCESS \|\| rc == VERR_SVM_IN_USE,
578	("hmR0InitAmdCpu failed for cpu %d with rc=%Rrc\n", hmR0FirstRcGetCpuId(&FirstRc), rc));
579	#endif
580	if (RT_SUCCESS(rc))
581	{
582	SUPR0GetHwvirtMsrs(&g_HmMsrs, SUPVTCAPS_AMD_V, false /* fForce */);
583	g_fHmSvmSupported = true;
584	}
585	else
586	{
587	g_rcHmInit = rc;
588	if (rc == VERR_SVM_DISABLED \|\| rc == VERR_SVM_IN_USE)
589	rc = VINF_SUCCESS; /* Don't fail if AMD-V is disabled or in use. */
590	}
591	}
592	else
593	g_rcHmInit = rc;
594	return rc;
595	}
596
597
598	/**
599	* Does global Ring-0 HM initialization (at module init).
600	*
601	* @returns VBox status code.
602	*/
603	VMMR0_INT_DECL(int) HMR0Init(void)
604	{
605	/*
606	* Initialize the globals.
607	*/
608	g_fHmEnabled = false;
609	for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++)
610	{
611	g_aHmCpuInfo[i].idCpu = NIL_RTCPUID;
612	g_aHmCpuInfo[i].hMemObj = NIL_RTR0MEMOBJ;
613	g_aHmCpuInfo[i].HCPhysMemObj = NIL_RTHCPHYS;
614	g_aHmCpuInfo[i].pvMemObj = NULL;
615	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
616	g_aHmCpuInfo[i].n.svm.hNstGstMsrpm = NIL_RTR0MEMOBJ;
617	g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = NIL_RTHCPHYS;
618	g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = NULL;
619	#endif
620	}
621
622	/* Fill in all callbacks with placeholders. */
623	g_HmR0Ops = g_HmR0OpsDummy;
624
625	/* Default is global VT-x/AMD-V init. */
626	g_fHmGlobalInit = true;
627
628	g_fHmVmxSupported = false;
629	g_fHmSvmSupported = false;
630	g_uHmMaxAsid = 0;
631
632	/*
633	* Get host kernel features that HM might need to know in order
634	* to co-operate and function properly with the host OS (e.g. SMAP).
635	*/
636	g_fHmHostKernelFeatures = SUPR0GetKernelFeatures();
637
638	/*
639	* Make sure aCpuInfo is big enough for all the CPUs on this system.
640	*/
641	if (RTMpGetArraySize() > RT_ELEMENTS(g_aHmCpuInfo))
642	{
643	LogRel(("HM: Too many real CPUs/cores/threads - %u, max %u\n", RTMpGetArraySize(), RT_ELEMENTS(g_aHmCpuInfo)));
644	return VERR_TOO_MANY_CPUS;
645	}
646
647	/*
648	* Check for VT-x or AMD-V support.
649	* Return failure only in out-of-memory situations.
650	*/
651	uint32_t fCaps = 0;
652	int rc = SUPR0GetVTSupport(&fCaps);
653	if (RT_SUCCESS(rc))
654	{
655	if (fCaps & SUPVTCAPS_VT_X)
656	rc = hmR0InitIntel();
657	else
658	{
659	Assert(fCaps & SUPVTCAPS_AMD_V);
660	rc = hmR0InitAmd();
661	}
662	if (RT_SUCCESS(rc))
663	{
664	/*
665	* Register notification callbacks that we can use to disable/enable CPUs
666	* when brought offline/online or suspending/resuming.
667	*/
668	if (!g_fHmVmxUsingSUPR0EnableVTx)
669	{
670	rc = RTMpNotificationRegister(hmR0MpEventCallback, NULL);
671	if (RT_SUCCESS(rc))
672	{
673	rc = RTPowerNotificationRegister(hmR0PowerCallback, NULL);
674	if (RT_FAILURE(rc))
675	RTMpNotificationDeregister(hmR0MpEventCallback, NULL);
676	}
677	if (RT_FAILURE(rc))
678	{
679	/* There shouldn't be any per-cpu allocations at this point,
680	so just have to call SVMR0GlobalTerm and VMXR0GlobalTerm. */
681	if (fCaps & SUPVTCAPS_VT_X)
682	VMXR0GlobalTerm();
683	else
684	SVMR0GlobalTerm();
685	g_HmR0Ops = g_HmR0OpsDummy;
686	g_rcHmInit = rc;
687	g_fHmSvmSupported = false;
688	g_fHmVmxSupported = false;
689	}
690	}
691	}
692	}
693	else
694	{
695	g_rcHmInit = rc;
696	rc = VINF_SUCCESS; /* We return success here because module init shall not fail if HM fails to initialize. */
697	}
698	return rc;
699	}
700
701
702	/**
703	* Does global Ring-0 HM termination (at module termination).
704	*
705	* @returns VBox status code (ignored).
706	*/
707	VMMR0_INT_DECL(int) HMR0Term(void)
708	{
709	int rc;
710	if ( g_fHmVmxSupported
711	&& g_fHmVmxUsingSUPR0EnableVTx)
712	{
713	/*
714	* Simple if the host OS manages VT-x.
715	*/
716	Assert(g_fHmGlobalInit);
717
718	if (g_fHmVmxCalledSUPR0EnableVTx)
719	{
720	rc = SUPR0EnableVTx(false /* fEnable */);
721	g_fHmVmxCalledSUPR0EnableVTx = false;
722	}
723	else
724	rc = VINF_SUCCESS;
725
726	for (unsigned iCpu = 0; iCpu < RT_ELEMENTS(g_aHmCpuInfo); iCpu++)
727	{
728	g_aHmCpuInfo[iCpu].fConfigured = false;
729	Assert(g_aHmCpuInfo[iCpu].hMemObj == NIL_RTR0MEMOBJ);
730	}
731	}
732	else
733	{
734	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
735
736	/* Doesn't really matter if this fails. */
737	RTMpNotificationDeregister(hmR0MpEventCallback, NULL);
738	RTPowerNotificationDeregister(hmR0PowerCallback, NULL);
739	rc = VINF_SUCCESS;
740
741	/*
742	* Disable VT-x/AMD-V on all CPUs if we enabled it before.
743	*/
744	if (g_fHmGlobalInit)
745	{
746	HMR0FIRSTRC FirstRc;
747	hmR0FirstRcInit(&FirstRc);
748	rc = RTMpOnAll(hmR0DisableCpuCallback, NULL /* pvUser 1 */, &FirstRc);
749	Assert(RT_SUCCESS(rc) \|\| rc == VERR_NOT_SUPPORTED);
750	if (RT_SUCCESS(rc))
751	rc = hmR0FirstRcGetStatus(&FirstRc);
752	}
753
754	/*
755	* Free the per-cpu pages used for VT-x and AMD-V.
756	*/
757	for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++)
758	{
759	if (g_aHmCpuInfo[i].hMemObj != NIL_RTR0MEMOBJ)
760	{
761	RTR0MemObjFree(g_aHmCpuInfo[i].hMemObj, false);
762	g_aHmCpuInfo[i].hMemObj = NIL_RTR0MEMOBJ;
763	g_aHmCpuInfo[i].HCPhysMemObj = NIL_RTHCPHYS;
764	g_aHmCpuInfo[i].pvMemObj = NULL;
765	}
766	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
767	if (g_aHmCpuInfo[i].n.svm.hNstGstMsrpm != NIL_RTR0MEMOBJ)
768	{
769	RTR0MemObjFree(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, false);
770	g_aHmCpuInfo[i].n.svm.hNstGstMsrpm = NIL_RTR0MEMOBJ;
771	g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = NIL_RTHCPHYS;
772	g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = NULL;
773	}
774	#endif
775	}
776	}
777
778	/** @todo This needs cleaning up. There's no matching
779	* hmR0TermIntel()/hmR0TermAmd() and all the VT-x/AMD-V specific bits
780	* should move into their respective modules. */
781	/* Finally, call global VT-x/AMD-V termination. */
782	if (g_fHmVmxSupported)
783	VMXR0GlobalTerm();
784	else if (g_fHmSvmSupported)
785	SVMR0GlobalTerm();
786
787	return rc;
788	}
789
790
791	/**
792	* Enable VT-x or AMD-V on the current CPU
793	*
794	* @returns VBox status code.
795	* @param pVM The cross context VM structure. Can be NULL.
796	* @param idCpu The identifier for the CPU the function is called on.
797	*
798	* @remarks Maybe called with interrupts disabled!
799	*/
800	static int hmR0EnableCpu(PVMCC pVM, RTCPUID idCpu)
801	{
802	PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu];
803
804	Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */
805	Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo));
806	Assert(!pHostCpu->fConfigured);
807	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
808
809	pHostCpu->idCpu = idCpu;
810	/* Do NOT reset cTlbFlushes here, see @bugref{6255}. */
811
812	int rc;
813	if ( g_fHmVmxSupported
814	&& g_fHmVmxUsingSUPR0EnableVTx)
815	rc = g_HmR0Ops.pfnEnableCpu(pHostCpu, pVM, NULL /* pvCpuPage */, NIL_RTHCPHYS, true, &g_HmMsrs);
816	else
817	{
818	AssertLogRelMsgReturn(pHostCpu->hMemObj != NIL_RTR0MEMOBJ, ("hmR0EnableCpu failed idCpu=%u.\n", idCpu), VERR_HM_IPE_1);
819	rc = g_HmR0Ops.pfnEnableCpu(pHostCpu, pVM, pHostCpu->pvMemObj, pHostCpu->HCPhysMemObj, false, &g_HmMsrs);
820	}
821	if (RT_SUCCESS(rc))
822	pHostCpu->fConfigured = true;
823	return rc;
824	}
825
826
827	/**
828	* Worker function passed to RTMpOnAll() that is to be called on all CPUs.
829	*
830	* @param idCpu The identifier for the CPU the function is called on.
831	* @param pvUser1 Opaque pointer to the VM (can be NULL!).
832	* @param pvUser2 The 2nd user argument.
833	*/
834	static DECLCALLBACK(void) hmR0EnableCpuCallback(RTCPUID idCpu, void pvUser1, void pvUser2)
835	{
836	PVMCC pVM = (PVMCC)pvUser1; /* can be NULL! */
837	PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser2;
838	AssertReturnVoid(g_fHmGlobalInit);
839	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
840	hmR0FirstRcSetStatus(pFirstRc, hmR0EnableCpu(pVM, idCpu));
841	}
842
843
844	/**
845	* RTOnce callback employed by HMR0EnableAllCpus.
846	*
847	* @returns VBox status code.
848	* @param pvUser Pointer to the VM.
849	*/
850	static DECLCALLBACK(int32_t) hmR0EnableAllCpuOnce(void *pvUser)
851	{
852	PVMCC pVM = (PVMCC)pvUser;
853
854	/*
855	* Indicate that we've initialized.
856	*
857	* Note! There is a potential race between this function and the suspend
858	* notification. Kind of unlikely though, so ignored for now.
859	*/
860	AssertReturn(!g_fHmEnabled, VERR_HM_ALREADY_ENABLED_IPE);
861	ASMAtomicWriteBool(&g_fHmEnabled, true);
862
863	/*
864	* The global init variable is set by the first VM.
865	*/
866	g_fHmGlobalInit = pVM->hm.s.fGlobalInit;
867
868	#ifdef VBOX_STRICT
869	for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++)
870	{
871	Assert(g_aHmCpuInfo[i].hMemObj == NIL_RTR0MEMOBJ);
872	Assert(g_aHmCpuInfo[i].HCPhysMemObj == NIL_RTHCPHYS);
873	Assert(g_aHmCpuInfo[i].pvMemObj == NULL);
874	Assert(!g_aHmCpuInfo[i].fConfigured);
875	Assert(!g_aHmCpuInfo[i].cTlbFlushes);
876	Assert(!g_aHmCpuInfo[i].uCurrentAsid);
877	# ifdef VBOX_WITH_NESTED_HWVIRT_SVM
878	Assert(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm == NIL_RTR0MEMOBJ);
879	Assert(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm == NIL_RTHCPHYS);
880	Assert(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm == NULL);
881	# endif
882	}
883	#endif
884
885	int rc;
886	if ( g_fHmVmxSupported
887	&& g_fHmVmxUsingSUPR0EnableVTx)
888	{
889	/*
890	* Global VT-x initialization API (only darwin for now).
891	*/
892	rc = SUPR0EnableVTx(true /* fEnable */);
893	if (RT_SUCCESS(rc))
894	{
895	g_fHmVmxCalledSUPR0EnableVTx = true;
896	/* If the host provides a VT-x init API, then we'll rely on that for global init. */
897	g_fHmGlobalInit = pVM->hm.s.fGlobalInit = true;
898	}
899	else
900	AssertMsgFailed(("hmR0EnableAllCpuOnce/SUPR0EnableVTx: rc=%Rrc\n", rc));
901	}
902	else
903	{
904	/*
905	* We're doing the job ourselves.
906	*/
907	/* Allocate one page per cpu for the global VT-x and AMD-V pages */
908	for (unsigned i = 0; i < RT_ELEMENTS(g_aHmCpuInfo); i++)
909	{
910	Assert(g_aHmCpuInfo[i].hMemObj == NIL_RTR0MEMOBJ);
911	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
912	Assert(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm == NIL_RTR0MEMOBJ);
913	#endif
914	if (RTMpIsCpuPossible(RTMpCpuIdFromSetIndex(i)))
915	{
916	/** @todo NUMA */
917	rc = RTR0MemObjAllocCont(&g_aHmCpuInfo[i].hMemObj, HOST_PAGE_SIZE, false /* executable R0 mapping */);
918	AssertLogRelRCReturn(rc, rc);
919
920	g_aHmCpuInfo[i].HCPhysMemObj = RTR0MemObjGetPagePhysAddr(g_aHmCpuInfo[i].hMemObj, 0);
921	Assert(g_aHmCpuInfo[i].HCPhysMemObj != NIL_RTHCPHYS);
922	Assert(!(g_aHmCpuInfo[i].HCPhysMemObj & HOST_PAGE_OFFSET_MASK));
923
924	g_aHmCpuInfo[i].pvMemObj = RTR0MemObjAddress(g_aHmCpuInfo[i].hMemObj);
925	AssertPtr(g_aHmCpuInfo[i].pvMemObj);
926	RT_BZERO(g_aHmCpuInfo[i].pvMemObj, HOST_PAGE_SIZE);
927
928	#ifdef VBOX_WITH_NESTED_HWVIRT_SVM
929	rc = RTR0MemObjAllocCont(&g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, SVM_MSRPM_PAGES << X86_PAGE_4K_SHIFT,
930	false /* executable R0 mapping */);
931	AssertLogRelRCReturn(rc, rc);
932
933	g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm = RTR0MemObjGetPagePhysAddr(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm, 0);
934	Assert(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm != NIL_RTHCPHYS);
935	Assert(!(g_aHmCpuInfo[i].n.svm.HCPhysNstGstMsrpm & HOST_PAGE_OFFSET_MASK));
936
937	g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm = RTR0MemObjAddress(g_aHmCpuInfo[i].n.svm.hNstGstMsrpm);
938	AssertPtr(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm);
939	ASMMemFill32(g_aHmCpuInfo[i].n.svm.pvNstGstMsrpm, SVM_MSRPM_PAGES << X86_PAGE_4K_SHIFT, UINT32_C(0xffffffff));
940	#endif
941	}
942	}
943
944	rc = VINF_SUCCESS;
945	}
946
947	if ( RT_SUCCESS(rc)
948	&& g_fHmGlobalInit)
949	{
950	/* First time, so initialize each cpu/core. */
951	HMR0FIRSTRC FirstRc;
952	hmR0FirstRcInit(&FirstRc);
953	rc = RTMpOnAll(hmR0EnableCpuCallback, (void *)pVM, &FirstRc);
954	if (RT_SUCCESS(rc))
955	rc = hmR0FirstRcGetStatus(&FirstRc);
956	}
957
958	return rc;
959	}
960
961
962	/**
963	* Sets up HM on all cpus.
964	*
965	* @returns VBox status code.
966	* @param pVM The cross context VM structure.
967	*/
968	VMMR0_INT_DECL(int) HMR0EnableAllCpus(PVMCC pVM)
969	{
970	/* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */
971	if (ASMAtomicReadBool(&g_fHmSuspended))
972	return VERR_HM_SUSPEND_PENDING;
973
974	return RTOnce(&g_HmEnableAllCpusOnce, hmR0EnableAllCpuOnce, pVM);
975	}
976
977
978	/**
979	* Disable VT-x or AMD-V on the current CPU.
980	*
981	* @returns VBox status code.
982	* @param idCpu The identifier for the CPU this function is called on.
983	*
984	* @remarks Must be called with preemption disabled.
985	*/
986	static int hmR0DisableCpu(RTCPUID idCpu)
987	{
988	PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu];
989
990	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
991	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
992	Assert(idCpu == (RTCPUID)RTMpCpuIdToSetIndex(idCpu)); /** @todo fix idCpu == index assumption (rainy day) */
993	Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo));
994	Assert(!pHostCpu->fConfigured \|\| pHostCpu->hMemObj != NIL_RTR0MEMOBJ);
995	AssertRelease(idCpu == RTMpCpuId());
996
997	if (pHostCpu->hMemObj == NIL_RTR0MEMOBJ)
998	return pHostCpu->fConfigured ? VERR_NO_MEMORY : VINF_SUCCESS /* not initialized. */;
999	AssertPtr(pHostCpu->pvMemObj);
1000	Assert(pHostCpu->HCPhysMemObj != NIL_RTHCPHYS);
1001
1002	int rc;
1003	if (pHostCpu->fConfigured)
1004	{
1005	rc = g_HmR0Ops.pfnDisableCpu(pHostCpu, pHostCpu->pvMemObj, pHostCpu->HCPhysMemObj);
1006	AssertRCReturn(rc, rc);
1007
1008	pHostCpu->fConfigured = false;
1009	pHostCpu->idCpu = NIL_RTCPUID;
1010	}
1011	else
1012	rc = VINF_SUCCESS; /* nothing to do */
1013	return rc;
1014	}
1015
1016
1017	/**
1018	* Worker function passed to RTMpOnAll() that is to be called on the target
1019	* CPUs.
1020	*
1021	* @param idCpu The identifier for the CPU the function is called on.
1022	* @param pvUser1 The 1st user argument.
1023	* @param pvUser2 Opaque pointer to the FirstRc.
1024	*/
1025	static DECLCALLBACK(void) hmR0DisableCpuCallback(RTCPUID idCpu, void pvUser1, void pvUser2)
1026	{
1027	PHMR0FIRSTRC pFirstRc = (PHMR0FIRSTRC)pvUser2; NOREF(pvUser1);
1028	AssertReturnVoid(g_fHmGlobalInit);
1029	hmR0FirstRcSetStatus(pFirstRc, hmR0DisableCpu(idCpu));
1030	}
1031
1032
1033	/**
1034	* Worker function passed to RTMpOnSpecific() that is to be called on the target
1035	* CPU.
1036	*
1037	* @param idCpu The identifier for the CPU the function is called on.
1038	* @param pvUser1 Null, not used.
1039	* @param pvUser2 Null, not used.
1040	*/
1041	static DECLCALLBACK(void) hmR0DisableCpuOnSpecificCallback(RTCPUID idCpu, void pvUser1, void pvUser2)
1042	{
1043	NOREF(pvUser1);
1044	NOREF(pvUser2);
1045	hmR0DisableCpu(idCpu);
1046	}
1047
1048
1049	/**
1050	* Callback function invoked when a cpu goes online or offline.
1051	*
1052	* @param enmEvent The Mp event.
1053	* @param idCpu The identifier for the CPU the function is called on.
1054	* @param pvData Opaque data (PVMCC pointer).
1055	*/
1056	static DECLCALLBACK(void) hmR0MpEventCallback(RTMPEVENT enmEvent, RTCPUID idCpu, void *pvData)
1057	{
1058	NOREF(pvData);
1059	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
1060
1061	/*
1062	* We only care about uninitializing a CPU that is going offline. When a
1063	* CPU comes online, the initialization is done lazily in HMR0Enter().
1064	*/
1065	switch (enmEvent)
1066	{
1067	case RTMPEVENT_OFFLINE:
1068	{
1069	RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER;
1070	RTThreadPreemptDisable(&PreemptState);
1071	if (idCpu == RTMpCpuId())
1072	{
1073	int rc = hmR0DisableCpu(idCpu);
1074	AssertRC(rc);
1075	RTThreadPreemptRestore(&PreemptState);
1076	}
1077	else
1078	{
1079	RTThreadPreemptRestore(&PreemptState);
1080	RTMpOnSpecific(idCpu, hmR0DisableCpuOnSpecificCallback, NULL /* pvUser1 /, NULL / pvUser2 */);
1081	}
1082	break;
1083	}
1084
1085	default:
1086	break;
1087	}
1088	}
1089
1090
1091	/**
1092	* Called whenever a system power state change occurs.
1093	*
1094	* @param enmEvent The Power event.
1095	* @param pvUser User argument.
1096	*/
1097	static DECLCALLBACK(void) hmR0PowerCallback(RTPOWEREVENT enmEvent, void *pvUser)
1098	{
1099	NOREF(pvUser);
1100	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
1101
1102	#ifdef LOG_ENABLED
1103	if (enmEvent == RTPOWEREVENT_SUSPEND)
1104	SUPR0Printf("hmR0PowerCallback RTPOWEREVENT_SUSPEND\n");
1105	else
1106	SUPR0Printf("hmR0PowerCallback RTPOWEREVENT_RESUME\n");
1107	#endif
1108
1109	if (enmEvent == RTPOWEREVENT_SUSPEND)
1110	ASMAtomicWriteBool(&g_fHmSuspended, true);
1111
1112	if (g_fHmEnabled)
1113	{
1114	int rc;
1115	HMR0FIRSTRC FirstRc;
1116	hmR0FirstRcInit(&FirstRc);
1117
1118	if (enmEvent == RTPOWEREVENT_SUSPEND)
1119	{
1120	if (g_fHmGlobalInit)
1121	{
1122	/* Turn off VT-x or AMD-V on all CPUs. */
1123	rc = RTMpOnAll(hmR0DisableCpuCallback, NULL /* pvUser 1 */, &FirstRc);
1124	Assert(RT_SUCCESS(rc) \|\| rc == VERR_NOT_SUPPORTED);
1125	}
1126	/* else nothing to do here for the local init case */
1127	}
1128	else
1129	{
1130	/* Reinit the CPUs from scratch as the suspend state might have
1131	messed with the MSRs. (lousy BIOSes as usual) */
1132	if (g_fHmVmxSupported)
1133	rc = RTMpOnAll(hmR0InitIntelCpu, &FirstRc, NULL);
1134	else
1135	rc = RTMpOnAll(hmR0InitAmdCpu, &FirstRc, NULL);
1136	Assert(RT_SUCCESS(rc) \|\| rc == VERR_NOT_SUPPORTED);
1137	if (RT_SUCCESS(rc))
1138	rc = hmR0FirstRcGetStatus(&FirstRc);
1139	#ifdef LOG_ENABLED
1140	if (RT_FAILURE(rc))
1141	SUPR0Printf("hmR0PowerCallback hmR0InitXxxCpu failed with %Rc\n", rc);
1142	#endif
1143	if (g_fHmGlobalInit)
1144	{
1145	/* Turn VT-x or AMD-V back on on all CPUs. */
1146	rc = RTMpOnAll(hmR0EnableCpuCallback, NULL /* pVM /, &FirstRc / output ignored */);
1147	Assert(RT_SUCCESS(rc) \|\| rc == VERR_NOT_SUPPORTED);
1148	}
1149	/* else nothing to do here for the local init case */
1150	}
1151	}
1152
1153	if (enmEvent == RTPOWEREVENT_RESUME)
1154	ASMAtomicWriteBool(&g_fHmSuspended, false);
1155	}
1156
1157
1158	/**
1159	* Does ring-0 per-VM HM initialization.
1160	*
1161	* This will call the CPU specific init. routine which may initialize and allocate
1162	* resources for virtual CPUs.
1163	*
1164	* @returns VBox status code.
1165	* @param pVM The cross context VM structure.
1166	*
1167	* @remarks This is called after HMR3Init(), see vmR3CreateU() and
1168	* vmR3InitRing3().
1169	*/
1170	VMMR0_INT_DECL(int) HMR0InitVM(PVMCC pVM)
1171	{
1172	AssertCompile(sizeof(pVM->hm.s) <= sizeof(pVM->hm.padding));
1173	AssertCompile(sizeof(pVM->hmr0.s) <= sizeof(pVM->hmr0.padding));
1174	AssertCompile(sizeof(pVM->aCpus[0].hm.s) <= sizeof(pVM->aCpus[0].hm.padding));
1175	AssertCompile(sizeof(pVM->aCpus[0].hmr0.s) <= sizeof(pVM->aCpus[0].hmr0.padding));
1176	AssertReturn(pVM, VERR_INVALID_PARAMETER);
1177
1178	/* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */
1179	if (ASMAtomicReadBool(&g_fHmSuspended))
1180	return VERR_HM_SUSPEND_PENDING;
1181
1182	/*
1183	* Copy globals to the VM structure.
1184	*/
1185	Assert(!(pVM->hm.s.vmx.fSupported && pVM->hm.s.svm.fSupported));
1186	if (pVM->hm.s.vmx.fSupported)
1187	{
1188	pVM->hmr0.s.vmx.fUsePreemptTimer = pVM->hm.s.vmx.fUsePreemptTimerCfg && g_fHmVmxUsePreemptTimer;
1189	pVM->hm.s.vmx.fUsePreemptTimerCfg = pVM->hmr0.s.vmx.fUsePreemptTimer;
1190	pVM->hm.s.vmx.cPreemptTimerShift = g_cHmVmxPreemptTimerShift;
1191	pVM->hm.s.ForR3.vmx.u64HostCr4 = g_uHmVmxHostCr4;
1192	pVM->hm.s.ForR3.vmx.u64HostMsrEfer = g_uHmVmxHostMsrEfer;
1193	pVM->hm.s.ForR3.vmx.u64HostSmmMonitorCtl = g_uHmVmxHostSmmMonitorCtl;
1194	pVM->hm.s.ForR3.vmx.u64HostFeatCtrl = g_HmMsrs.u.vmx.u64FeatCtrl;
1195	HMGetVmxMsrsFromHwvirtMsrs(&g_HmMsrs, &pVM->hm.s.ForR3.vmx.Msrs);
1196	/* If you need to tweak host MSRs for testing VMX R0 code, do it here. */
1197
1198	/* Enable VPID if supported and configured. */
1199	if (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VPID)
1200	pVM->hm.s.ForR3.vmx.fVpid = pVM->hmr0.s.vmx.fVpid = pVM->hm.s.vmx.fAllowVpid; /* Can be overridden by CFGM in HMR3Init(). */
1201
1202	/* Use VMCS shadowing if supported. */
1203	pVM->hmr0.s.vmx.fUseVmcsShadowing = pVM->cpum.ro.GuestFeatures.fVmx
1204	&& (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VMCS_SHADOWING);
1205	pVM->hm.s.ForR3.vmx.fUseVmcsShadowing = pVM->hmr0.s.vmx.fUseVmcsShadowing;
1206
1207	/* Use the VMCS controls for swapping the EFER MSR if supported. */
1208	pVM->hm.s.ForR3.vmx.fSupportsVmcsEfer = g_fHmVmxSupportsVmcsEfer;
1209
1210	#if 0
1211	/* Enable APIC register virtualization and virtual-interrupt delivery if supported. */
1212	if ( (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_APIC_REG_VIRT)
1213	&& (g_HmMsrs.u.vmx.ProcCtls2.n.allowed1 & VMX_PROC_CTLS2_VIRT_INTR_DELIVERY))
1214	pVM->hm.s.fVirtApicRegs = true;
1215
1216	/* Enable posted-interrupt processing if supported. */
1217	/** @todo Add and query IPRT API for host OS support for posted-interrupt IPI
1218	* here. */
1219	if ( (g_HmMsrs.u.vmx.PinCtls.n.allowed1 & VMX_PIN_CTLS_POSTED_INT)
1220	&& (g_HmMsrs.u.vmx.ExitCtls.n.allowed1 & VMX_EXIT_CTLS_ACK_EXT_INT))
1221	pVM->hm.s.fPostedIntrs = true;
1222	#endif
1223	}
1224	else if (pVM->hm.s.svm.fSupported)
1225	{
1226	pVM->hm.s.ForR3.svm.u32Rev = g_uHmSvmRev;
1227	pVM->hm.s.ForR3.svm.fFeatures = g_fHmSvmFeatures;
1228	pVM->hm.s.ForR3.svm.u64MsrHwcr = g_HmMsrs.u.svm.u64MsrHwcr;
1229	/* If you need to tweak host MSRs for testing SVM R0 code, do it here. */
1230	}
1231	pVM->hm.s.ForR3.rcInit = g_rcHmInit;
1232	pVM->hm.s.ForR3.uMaxAsid = g_uHmMaxAsid;
1233
1234	/*
1235	* Set default maximum inner loops in ring-0 before returning to ring-3.
1236	* Can be overriden using CFGM.
1237	*/
1238	uint32_t cMaxResumeLoops = pVM->hm.s.cMaxResumeLoopsCfg;
1239	if (!cMaxResumeLoops)
1240	{
1241	cMaxResumeLoops = 1024;
1242	if (RTThreadPreemptIsPendingTrusty())
1243	cMaxResumeLoops = 8192;
1244	}
1245	else if (cMaxResumeLoops > 16384)
1246	cMaxResumeLoops = 16384;
1247	else if (cMaxResumeLoops < 32)
1248	cMaxResumeLoops = 32;
1249	pVM->hm.s.cMaxResumeLoopsCfg = pVM->hmr0.s.cMaxResumeLoops = cMaxResumeLoops;
1250
1251	/*
1252	* Initialize some per-VCPU fields.
1253	*/
1254	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1255	{
1256	PVMCPUCC pVCpu = VMCC_GET_CPU(pVM, idCpu);
1257	pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID;
1258	pVCpu->hmr0.s.idLastCpu = NIL_RTCPUID;
1259
1260	/* We'll aways increment this the first time (host uses ASID 0). */
1261	AssertReturn(!pVCpu->hmr0.s.uCurrentAsid, VERR_HM_IPE_3);
1262	}
1263
1264	/*
1265	* Configure defences against spectre and other CPU bugs.
1266	*/
1267	uint32_t fWorldSwitcher = 0;
1268	uint32_t cLastStdLeaf = ASMCpuId_EAX(0);
1269	if (cLastStdLeaf >= 0x00000007 && RTX86IsValidStdRange(cLastStdLeaf))
1270	{
1271	uint32_t uEdx = 0;
1272	ASMCpuIdExSlow(0x00000007, 0, 0, 0, NULL, NULL, NULL, &uEdx);
1273
1274	if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_IBRS_IBPB)
1275	{
1276	if (pVM->hm.s.fIbpbOnVmExit)
1277	fWorldSwitcher \|= HM_WSF_IBPB_EXIT;
1278	if (pVM->hm.s.fIbpbOnVmEntry)
1279	fWorldSwitcher \|= HM_WSF_IBPB_ENTRY;
1280	}
1281	if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_FLUSH_CMD)
1282	{
1283	if (pVM->hm.s.fL1dFlushOnVmEntry)
1284	fWorldSwitcher \|= HM_WSF_L1D_ENTRY;
1285	else if (pVM->hm.s.fL1dFlushOnSched)
1286	fWorldSwitcher \|= HM_WSF_L1D_SCHED;
1287	}
1288	if (uEdx & X86_CPUID_STEXT_FEATURE_EDX_MD_CLEAR)
1289	{
1290	if (pVM->hm.s.fMdsClearOnVmEntry)
1291	fWorldSwitcher \|= HM_WSF_MDS_ENTRY;
1292	else if (pVM->hm.s.fMdsClearOnSched)
1293	fWorldSwitcher \|= HM_WSF_MDS_SCHED;
1294	}
1295	}
1296	for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1297	{
1298	PVMCPUCC pVCpu = VMCC_GET_CPU(pVM, idCpu);
1299	pVCpu->hmr0.s.fWorldSwitcher = fWorldSwitcher;
1300	}
1301	pVM->hm.s.ForR3.fWorldSwitcher = fWorldSwitcher;
1302
1303
1304	/*
1305	* Call the hardware specific initialization method.
1306	*/
1307	return g_HmR0Ops.pfnInitVM(pVM);
1308	}
1309
1310
1311	/**
1312	* Does ring-0 per VM HM termination.
1313	*
1314	* @returns VBox status code.
1315	* @param pVM The cross context VM structure.
1316	*/
1317	VMMR0_INT_DECL(int) HMR0TermVM(PVMCC pVM)
1318	{
1319	Log(("HMR0TermVM: %p\n", pVM));
1320	AssertReturn(pVM, VERR_INVALID_PARAMETER);
1321
1322	/*
1323	* Call the hardware specific method.
1324	*
1325	* Note! We might be preparing for a suspend, so the pfnTermVM() functions should probably not
1326	* mess with VT-x/AMD-V features on the CPU, currently all they do is free memory so this is safe.
1327	*/
1328	return g_HmR0Ops.pfnTermVM(pVM);
1329	}
1330
1331
1332	/**
1333	* Sets up a VT-x or AMD-V session.
1334	*
1335	* This is mostly about setting up the hardware VM state.
1336	*
1337	* @returns VBox status code.
1338	* @param pVM The cross context VM structure.
1339	*/
1340	VMMR0_INT_DECL(int) HMR0SetupVM(PVMCC pVM)
1341	{
1342	Log(("HMR0SetupVM: %p\n", pVM));
1343	AssertReturn(pVM, VERR_INVALID_PARAMETER);
1344
1345	/* Make sure we don't touch HM after we've disabled HM in preparation of a suspend. */
1346	AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING);
1347
1348	/* On first entry we'll sync everything. */
1349	VMCC_FOR_EACH_VMCPU_STMT(pVM, pVCpu->hm.s.fCtxChanged \|= HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_ALL_GUEST);
1350
1351	/*
1352	* Call the hardware specific setup VM method. This requires the CPU to be
1353	* enabled for AMD-V/VT-x and preemption to be prevented.
1354	*/
1355	RTTHREADPREEMPTSTATE PreemptState = RTTHREADPREEMPTSTATE_INITIALIZER;
1356	RTThreadPreemptDisable(&PreemptState);
1357	RTCPUID const idCpu = RTMpCpuId();
1358
1359	/* Enable VT-x or AMD-V if local init is required. */
1360	int rc;
1361	if (!g_fHmGlobalInit)
1362	{
1363	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
1364	rc = hmR0EnableCpu(pVM, idCpu);
1365	if (RT_FAILURE(rc))
1366	{
1367	RTThreadPreemptRestore(&PreemptState);
1368	return rc;
1369	}
1370	}
1371
1372	/* Setup VT-x or AMD-V. */
1373	rc = g_HmR0Ops.pfnSetupVM(pVM);
1374
1375	/* Disable VT-x or AMD-V if local init was done before. */
1376	if (!g_fHmGlobalInit)
1377	{
1378	Assert(!g_fHmVmxSupported \|\| !g_fHmVmxUsingSUPR0EnableVTx);
1379	int rc2 = hmR0DisableCpu(idCpu);
1380	AssertRC(rc2);
1381	}
1382
1383	RTThreadPreemptRestore(&PreemptState);
1384	return rc;
1385	}
1386
1387
1388	/**
1389	* Notification callback before an assertion longjump and guru mediation.
1390	*
1391	* @returns VBox status code.
1392	* @param pVCpu The cross context virtual CPU structure.
1393	* @param pvUser User argument, currently unused, NULL.
1394	*/
1395	static DECLCALLBACK(int) hmR0AssertionCallback(PVMCPUCC pVCpu, void *pvUser)
1396	{
1397	RT_NOREF(pvUser);
1398	Assert(pVCpu);
1399	Assert(g_HmR0Ops.pfnAssertionCallback);
1400	return g_HmR0Ops.pfnAssertionCallback(pVCpu);
1401	}
1402
1403
1404	/**
1405	* Turns on HM on the CPU if necessary and initializes the bare minimum state
1406	* required for entering HM context.
1407	*
1408	* @returns VBox status code.
1409	* @param pVCpu The cross context virtual CPU structure.
1410	*
1411	* @remarks No-long-jump zone!!!
1412	*/
1413	VMMR0_INT_DECL(int) hmR0EnterCpu(PVMCPUCC pVCpu)
1414	{
1415	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
1416
1417	int rc = VINF_SUCCESS;
1418	RTCPUID const idCpu = RTMpCpuId();
1419	PHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu];
1420	AssertPtr(pHostCpu);
1421
1422	/* Enable VT-x or AMD-V if local init is required, or enable if it's a freshly onlined CPU. */
1423	if (!pHostCpu->fConfigured)
1424	rc = hmR0EnableCpu(pVCpu->CTX_SUFF(pVM), idCpu);
1425
1426	/* Register a callback to fire prior to performing a longjmp to ring-3 so HM can disable VT-x/AMD-V if needed. */
1427	VMMR0AssertionSetNotification(pVCpu, hmR0AssertionCallback, NULL /pvUser/);
1428
1429	/* Reload host-state (back from ring-3/migrated CPUs) and shared guest/host bits. */
1430	if (g_fHmVmxSupported)
1431	pVCpu->hm.s.fCtxChanged \|= HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE;
1432	else
1433	pVCpu->hm.s.fCtxChanged \|= HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE;
1434
1435	Assert(pHostCpu->idCpu == idCpu && pHostCpu->idCpu != NIL_RTCPUID);
1436	pVCpu->hmr0.s.idEnteredCpu = idCpu;
1437	return rc;
1438	}
1439
1440
1441	/**
1442	* Enters the VT-x or AMD-V session.
1443	*
1444	* @returns VBox status code.
1445	* @param pVCpu The cross context virtual CPU structure.
1446	*
1447	* @remarks This is called with preemption disabled.
1448	*/
1449	VMMR0_INT_DECL(int) HMR0Enter(PVMCPUCC pVCpu)
1450	{
1451	/* Make sure we can't enter a session after we've disabled HM in preparation of a suspend. */
1452	AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING);
1453	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
1454
1455	/* Load the bare minimum state required for entering HM. */
1456	int rc = hmR0EnterCpu(pVCpu);
1457	if (RT_SUCCESS(rc))
1458	{
1459	if (g_fHmVmxSupported)
1460	Assert( (pVCpu->hm.s.fCtxChanged & (HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE))
1461	== (HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_VMX_HOST_GUEST_SHARED_STATE));
1462	else
1463	Assert( (pVCpu->hm.s.fCtxChanged & (HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE))
1464	== (HM_CHANGED_HOST_CONTEXT \| HM_CHANGED_SVM_HOST_GUEST_SHARED_STATE));
1465
1466	/* Keep track of the CPU owning the VMCS for debugging scheduling weirdness and ring-3 calls. */
1467	rc = g_HmR0Ops.pfnEnterSession(pVCpu);
1468	AssertMsgRCReturnStmt(rc, ("rc=%Rrc pVCpu=%p\n", rc, pVCpu), pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID, rc);
1469
1470	/* Exports the host-state as we may be resuming code after a longjmp and quite
1471	possibly now be scheduled on a different CPU. */
1472	rc = g_HmR0Ops.pfnExportHostState(pVCpu);
1473	AssertMsgRCReturnStmt(rc, ("rc=%Rrc pVCpu=%p\n", rc, pVCpu), pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID, rc);
1474	}
1475	return rc;
1476	}
1477
1478
1479	/**
1480	* Deinitializes the bare minimum state used for HM context and if necessary
1481	* disable HM on the CPU.
1482	*
1483	* @returns VBox status code.
1484	* @param pVCpu The cross context virtual CPU structure.
1485	*
1486	* @remarks No-long-jump zone!!!
1487	*/
1488	VMMR0_INT_DECL(int) HMR0LeaveCpu(PVMCPUCC pVCpu)
1489	{
1490	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
1491	VMCPU_ASSERT_EMT_RETURN(pVCpu, VERR_HM_WRONG_CPU);
1492
1493	RTCPUID const idCpu = RTMpCpuId();
1494	PCHMPHYSCPU pHostCpu = &g_aHmCpuInfo[idCpu];
1495
1496	if ( !g_fHmGlobalInit
1497	&& pHostCpu->fConfigured)
1498	{
1499	int rc = hmR0DisableCpu(idCpu);
1500	AssertRCReturn(rc, rc);
1501	Assert(!pHostCpu->fConfigured);
1502	Assert(pHostCpu->idCpu == NIL_RTCPUID);
1503
1504	/* For obtaining a non-zero ASID/VPID on next re-entry. */
1505	pVCpu->hmr0.s.idLastCpu = NIL_RTCPUID;
1506	}
1507
1508	/* Clear it while leaving HM context, hmPokeCpuForTlbFlush() relies on this. */
1509	pVCpu->hmr0.s.idEnteredCpu = NIL_RTCPUID;
1510
1511	/* De-register the longjmp-to-ring 3 callback now that we have reliquished hardware resources. */
1512	VMMR0AssertionRemoveNotification(pVCpu);
1513	return VINF_SUCCESS;
1514	}
1515
1516
1517	/**
1518	* Thread-context hook for HM.
1519	*
1520	* This is used together with RTThreadCtxHookCreate() on platforms which
1521	* supports it, and directly from VMMR0EmtPrepareForBlocking() and
1522	* VMMR0EmtResumeAfterBlocking() on platforms which don't.
1523	*
1524	* @param enmEvent The thread-context event.
1525	* @param pvUser Opaque pointer to the VMCPU.
1526	*/
1527	VMMR0_INT_DECL(void) HMR0ThreadCtxCallback(RTTHREADCTXEVENT enmEvent, void *pvUser)
1528	{
1529	PVMCPUCC pVCpu = (PVMCPUCC)pvUser;
1530	Assert(pVCpu);
1531	Assert(g_HmR0Ops.pfnThreadCtxCallback);
1532
1533	g_HmR0Ops.pfnThreadCtxCallback(enmEvent, pVCpu, g_fHmGlobalInit);
1534	}
1535
1536
1537	/**
1538	* Runs guest code in a hardware accelerated VM.
1539	*
1540	* @returns Strict VBox status code. (VBOXSTRICTRC isn't used because it's
1541	* called from setjmp assembly.)
1542	* @param pVM The cross context VM structure.
1543	* @param pVCpu The cross context virtual CPU structure.
1544	*
1545	* @remarks Can be called with preemption enabled if thread-context hooks are
1546	* used!!!
1547	*/
1548	VMMR0_INT_DECL(int) HMR0RunGuestCode(PVMCC pVM, PVMCPUCC pVCpu)
1549	{
1550	RT_NOREF(pVM);
1551
1552	#ifdef VBOX_STRICT
1553	/* With thread-context hooks we would be running this code with preemption enabled. */
1554	if (!RTThreadPreemptIsEnabled(NIL_RTTHREAD))
1555	{
1556	PCHMPHYSCPU pHostCpu = &g_aHmCpuInfo[RTMpCpuId()];
1557	Assert(!VMCPU_FF_IS_ANY_SET(pVCpu, VMCPU_FF_PGM_SYNC_CR3 \| VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL));
1558	Assert(pHostCpu->fConfigured);
1559	AssertReturn(!ASMAtomicReadBool(&g_fHmSuspended), VERR_HM_SUSPEND_PENDING);
1560	}
1561	#endif
1562
1563	VBOXSTRICTRC rcStrict = g_HmR0Ops.pfnRunGuestCode(pVCpu);
1564	return VBOXSTRICTRC_VAL(rcStrict);
1565	}
1566
1567
1568	/**
1569	* Notification from CPUM that it has unloaded the guest FPU/SSE/AVX state from
1570	* the host CPU and that guest access to it must be intercepted.
1571	*
1572	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
1573	*/
1574	VMMR0_INT_DECL(void) HMR0NotifyCpumUnloadedGuestFpuState(PVMCPUCC pVCpu)
1575	{
1576	ASMAtomicUoOrU64(&pVCpu->hm.s.fCtxChanged, HM_CHANGED_GUEST_CR0);
1577	}
1578
1579
1580	/**
1581	* Notification from CPUM that it has modified the host CR0 (because of FPU).
1582	*
1583	* @param pVCpu The cross context virtual CPU structure of the calling EMT.
1584	*/
1585	VMMR0_INT_DECL(void) HMR0NotifyCpumModifiedHostCr0(PVMCPUCC pVCpu)
1586	{
1587	ASMAtomicUoOrU64(&pVCpu->hm.s.fCtxChanged, HM_CHANGED_HOST_CONTEXT);
1588	}
1589
1590
1591	/**
1592	* Returns suspend status of the host.
1593	*
1594	* @returns Suspend pending or not.
1595	*/
1596	VMMR0_INT_DECL(bool) HMR0SuspendPending(void)
1597	{
1598	return ASMAtomicReadBool(&g_fHmSuspended);
1599	}
1600
1601
1602	/**
1603	* Invalidates a guest page from the host TLB.
1604	*
1605	* @param pVCpu The cross context virtual CPU structure.
1606	* @param GCVirt Page to invalidate.
1607	*/
1608	VMMR0_INT_DECL(int) HMR0InvalidatePage(PVMCPUCC pVCpu, RTGCPTR GCVirt)
1609	{
1610	PVMCC pVM = pVCpu->CTX_SUFF(pVM);
1611	if (pVM->hm.s.vmx.fSupported)
1612	return VMXR0InvalidatePage(pVCpu, GCVirt);
1613	return SVMR0InvalidatePage(pVCpu, GCVirt);
1614	}
1615
1616
1617	/**
1618	* Returns the cpu structure for the current cpu.
1619	* Keep in mind that there is no guarantee it will stay the same (long jumps to ring 3!!!).
1620	*
1621	* @returns The cpu structure pointer.
1622	*/
1623	VMMR0_INT_DECL(PHMPHYSCPU) hmR0GetCurrentCpu(void)
1624	{
1625	Assert(!RTThreadPreemptIsEnabled(NIL_RTTHREAD));
1626	RTCPUID const idCpu = RTMpCpuId();
1627	Assert(idCpu < RT_ELEMENTS(g_aHmCpuInfo));
1628	return &g_aHmCpuInfo[idCpu];
1629	}
1630
1631
1632	/**
1633	* Interface for importing state on demand (used by IEM).
1634	*
1635	* @returns VBox status code.
1636	* @param pVCpu The cross context CPU structure.
1637	* @param fWhat What to import, CPUMCTX_EXTRN_XXX.
1638	*/
1639	VMMR0_INT_DECL(int) HMR0ImportStateOnDemand(PVMCPUCC pVCpu, uint64_t fWhat)
1640	{
1641	if (pVCpu->CTX_SUFF(pVM)->hm.s.vmx.fSupported)
1642	return VMXR0ImportStateOnDemand(pVCpu, fWhat);
1643	return SVMR0ImportStateOnDemand(pVCpu, fWhat);
1644	}
1645
1646
1647	/**
1648	* Gets HM VM-exit auxiliary information.
1649	*
1650	* @returns VBox status code.
1651	* @param pVCpu The cross context CPU structure.
1652	* @param pHmExitAux Where to store the auxiliary info.
1653	* @param fWhat What to get, see HMVMX_READ_XXX. This is ignored/unused
1654	* on AMD-V.
1655	*
1656	* @remarks Currently this works only when executing a nested-guest using
1657	* hardware-assisted execution as it's where the auxiliary information is
1658	* required outside of HM. In the future we can make this available while
1659	* executing a regular (non-nested) guest if necessary.
1660	*/
1661	VMMR0_INT_DECL(int) HMR0GetExitAuxInfo(PVMCPUCC pVCpu, PHMEXITAUX pHmExitAux, uint32_t fWhat)
1662	{
1663	Assert(pHmExitAux);
1664	Assert(!(fWhat & ~HMVMX_READ_VALID_MASK));
1665	if (pVCpu->CTX_SUFF(pVM)->hm.s.vmx.fSupported)
1666	return VMXR0GetExitAuxInfo(pVCpu, &pHmExitAux->Vmx, fWhat);
1667	return SVMR0GetExitAuxInfo(pVCpu, &pHmExitAux->Svm);
1668	}
1669
1670
1671	#ifdef VBOX_STRICT
1672
1673	/**
1674	* Dumps a descriptor.
1675	*
1676	* @param pDesc Descriptor to dump.
1677	* @param Sel The selector.
1678	* @param pszSel The name of the selector.
1679	*/
1680	VMMR0_INT_DECL(void) hmR0DumpDescriptor(PCX86DESCHC pDesc, RTSEL Sel, const char *pszSel)
1681	{
1682	/*
1683	* Make variable description string.
1684	*/
1685	static struct
1686	{
1687	unsigned cch;
1688	const char *psz;
1689	} const s_aTypes[32] =
1690	{
1691	# define STRENTRY(str) { sizeof(str) - 1, str }
1692
1693	/* system */
1694	# if HC_ARCH_BITS == 64
1695	STRENTRY("Reserved0 "), /* 0x00 */
1696	STRENTRY("Reserved1 "), /* 0x01 */
1697	STRENTRY("LDT "), /* 0x02 */
1698	STRENTRY("Reserved3 "), /* 0x03 */
1699	STRENTRY("Reserved4 "), /* 0x04 */
1700	STRENTRY("Reserved5 "), /* 0x05 */
1701	STRENTRY("Reserved6 "), /* 0x06 */
1702	STRENTRY("Reserved7 "), /* 0x07 */
1703	STRENTRY("Reserved8 "), /* 0x08 */
1704	STRENTRY("TSS64Avail "), /* 0x09 */
1705	STRENTRY("ReservedA "), /* 0x0a */
1706	STRENTRY("TSS64Busy "), /* 0x0b */
1707	STRENTRY("Call64 "), /* 0x0c */
1708	STRENTRY("ReservedD "), /* 0x0d */
1709	STRENTRY("Int64 "), /* 0x0e */
1710	STRENTRY("Trap64 "), /* 0x0f */
1711	# else
1712	STRENTRY("Reserved0 "), /* 0x00 */
1713	STRENTRY("TSS16Avail "), /* 0x01 */
1714	STRENTRY("LDT "), /* 0x02 */
1715	STRENTRY("TSS16Busy "), /* 0x03 */
1716	STRENTRY("Call16 "), /* 0x04 */
1717	STRENTRY("Task "), /* 0x05 */
1718	STRENTRY("Int16 "), /* 0x06 */
1719	STRENTRY("Trap16 "), /* 0x07 */
1720	STRENTRY("Reserved8 "), /* 0x08 */
1721	STRENTRY("TSS32Avail "), /* 0x09 */
1722	STRENTRY("ReservedA "), /* 0x0a */
1723	STRENTRY("TSS32Busy "), /* 0x0b */
1724	STRENTRY("Call32 "), /* 0x0c */
1725	STRENTRY("ReservedD "), /* 0x0d */
1726	STRENTRY("Int32 "), /* 0x0e */
1727	STRENTRY("Trap32 "), /* 0x0f */
1728	# endif
1729	/* non system */
1730	STRENTRY("DataRO "), /* 0x10 */
1731	STRENTRY("DataRO Accessed "), /* 0x11 */
1732	STRENTRY("DataRW "), /* 0x12 */
1733	STRENTRY("DataRW Accessed "), /* 0x13 */
1734	STRENTRY("DataDownRO "), /* 0x14 */
1735	STRENTRY("DataDownRO Accessed "), /* 0x15 */
1736	STRENTRY("DataDownRW "), /* 0x16 */
1737	STRENTRY("DataDownRW Accessed "), /* 0x17 */
1738	STRENTRY("CodeEO "), /* 0x18 */
1739	STRENTRY("CodeEO Accessed "), /* 0x19 */
1740	STRENTRY("CodeER "), /* 0x1a */
1741	STRENTRY("CodeER Accessed "), /* 0x1b */
1742	STRENTRY("CodeConfEO "), /* 0x1c */
1743	STRENTRY("CodeConfEO Accessed "), /* 0x1d */
1744	STRENTRY("CodeConfER "), /* 0x1e */
1745	STRENTRY("CodeConfER Accessed ") /* 0x1f */
1746	# undef SYSENTRY
1747	};
1748	# define ADD_STR(psz, pszAdd) do { strcpy(psz, pszAdd); psz += strlen(pszAdd); } while (0)
1749	char szMsg[128];
1750	char *psz = &szMsg[0];
1751	unsigned i = pDesc->Gen.u1DescType << 4 \| pDesc->Gen.u4Type;
1752	memcpy(psz, s_aTypes[i].psz, s_aTypes[i].cch);
1753	psz += s_aTypes[i].cch;
1754
1755	if (pDesc->Gen.u1Present)
1756	ADD_STR(psz, "Present ");
1757	else
1758	ADD_STR(psz, "Not-Present ");
1759	# if HC_ARCH_BITS == 64
1760	if (pDesc->Gen.u1Long)
1761	ADD_STR(psz, "64-bit ");
1762	else
1763	ADD_STR(psz, "Comp ");
1764	# else
1765	if (pDesc->Gen.u1Granularity)
1766	ADD_STR(psz, "Page ");
1767	if (pDesc->Gen.u1DefBig)
1768	ADD_STR(psz, "32-bit ");
1769	else
1770	ADD_STR(psz, "16-bit ");
1771	# endif
1772	# undef ADD_STR
1773	*psz = '\0';
1774
1775	/*
1776	* Limit and Base and format the output.
1777	*/
1778	#ifdef LOG_ENABLED
1779	uint32_t u32Limit = X86DESC_LIMIT_G(pDesc);
1780
1781	# if HC_ARCH_BITS == 64
1782	uint64_t const u64Base = X86DESC64_BASE(pDesc);
1783	Log((" %s { %#04x - %#RX64 %#RX64 - base=%#RX64 limit=%#08x dpl=%d } %s\n", pszSel,
1784	Sel, pDesc->au64[0], pDesc->au64[1], u64Base, u32Limit, pDesc->Gen.u2Dpl, szMsg));
1785	# else
1786	uint32_t const u32Base = X86DESC_BASE(pDesc);
1787	Log((" %s { %#04x - %#08x %#08x - base=%#08x limit=%#08x dpl=%d } %s\n", pszSel,
1788	Sel, pDesc->au32[0], pDesc->au32[1], u32Base, u32Limit, pDesc->Gen.u2Dpl, szMsg));
1789	# endif
1790	#else
1791	NOREF(Sel); NOREF(pszSel);
1792	#endif
1793	}
1794
1795
1796	/**
1797	* Formats a full register dump.
1798	*
1799	* @param pVCpu The cross context virtual CPU structure.
1800	* @param fFlags The dumping flags (HM_DUMP_REG_FLAGS_XXX).
1801	*/
1802	VMMR0_INT_DECL(void) hmR0DumpRegs(PVMCPUCC pVCpu, uint32_t fFlags)
1803	{
1804	/*
1805	* Format the flags.
1806	*/
1807	static struct
1808	{
1809	const char *pszSet;
1810	const char *pszClear;
1811	uint32_t fFlag;
1812	} const s_aFlags[] =
1813	{
1814	{ "vip", NULL, X86_EFL_VIP },
1815	{ "vif", NULL, X86_EFL_VIF },
1816	{ "ac", NULL, X86_EFL_AC },
1817	{ "vm", NULL, X86_EFL_VM },
1818	{ "rf", NULL, X86_EFL_RF },
1819	{ "nt", NULL, X86_EFL_NT },
1820	{ "ov", "nv", X86_EFL_OF },
1821	{ "dn", "up", X86_EFL_DF },
1822	{ "ei", "di", X86_EFL_IF },
1823	{ "tf", NULL, X86_EFL_TF },
1824	{ "nt", "pl", X86_EFL_SF },
1825	{ "nz", "zr", X86_EFL_ZF },
1826	{ "ac", "na", X86_EFL_AF },
1827	{ "po", "pe", X86_EFL_PF },
1828	{ "cy", "nc", X86_EFL_CF },
1829	};
1830	char szEFlags[80];
1831	char *psz = szEFlags;
1832	PCCPUMCTX pCtx = &pVCpu->cpum.GstCtx;
1833	uint32_t fEFlags = pCtx->eflags.u;
1834	for (unsigned i = 0; i < RT_ELEMENTS(s_aFlags); i++)
1835	{
1836	const char *pszAdd = s_aFlags[i].fFlag & fEFlags ? s_aFlags[i].pszSet : s_aFlags[i].pszClear;
1837	if (pszAdd)
1838	{
1839	strcpy(psz, pszAdd);
1840	psz += strlen(pszAdd);
1841	*psz++ = ' ';
1842	}
1843	}
1844	psz[-1] = '\0';
1845
1846	if (fFlags & HM_DUMP_REG_FLAGS_GPRS)
1847	{
1848	/*
1849	* Format the registers.
1850	*/
1851	if (CPUMIsGuestIn64BitCode(pVCpu))
1852	Log(("rax=%016RX64 rbx=%016RX64 rcx=%016RX64 rdx=%016RX64\n"
1853	"rsi=%016RX64 rdi=%016RX64 r8 =%016RX64 r9 =%016RX64\n"
1854	"r10=%016RX64 r11=%016RX64 r12=%016RX64 r13=%016RX64\n"
1855	"r14=%016RX64 r15=%016RX64\n"
1856	"rip=%016RX64 rsp=%016RX64 rbp=%016RX64 iopl=%d %*s\n"
1857	"cs={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1858	"ds={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1859	"es={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1860	"fs={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1861	"gs={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1862	"ss={%04x base=%016RX64 limit=%08x flags=%08x}\n"
1863	"cr0=%016RX64 cr2=%016RX64 cr3=%016RX64 cr4=%016RX64\n"
1864	"dr0=%016RX64 dr1=%016RX64 dr2=%016RX64 dr3=%016RX64\n"
1865	"dr4=%016RX64 dr5=%016RX64 dr6=%016RX64 dr7=%016RX64\n"
1866	"gdtr=%016RX64:%04x idtr=%016RX64:%04x eflags=%08x\n"
1867	"ldtr={%04x base=%08RX64 limit=%08x flags=%08x}\n"
1868	"tr ={%04x base=%08RX64 limit=%08x flags=%08x}\n"
1869	"SysEnter={cs=%04llx eip=%08llx esp=%08llx}\n"
1870	,
1871	pCtx->rax, pCtx->rbx, pCtx->rcx, pCtx->rdx, pCtx->rsi, pCtx->rdi,
1872	pCtx->r8, pCtx->r9, pCtx->r10, pCtx->r11, pCtx->r12, pCtx->r13,
1873	pCtx->r14, pCtx->r15,
1874	pCtx->rip, pCtx->rsp, pCtx->rbp, X86_EFL_GET_IOPL(fEFlags), 31, szEFlags,
1875	pCtx->cs.Sel, pCtx->cs.u64Base, pCtx->cs.u32Limit, pCtx->cs.Attr.u,
1876	pCtx->ds.Sel, pCtx->ds.u64Base, pCtx->ds.u32Limit, pCtx->ds.Attr.u,
1877	pCtx->es.Sel, pCtx->es.u64Base, pCtx->es.u32Limit, pCtx->es.Attr.u,
1878	pCtx->fs.Sel, pCtx->fs.u64Base, pCtx->fs.u32Limit, pCtx->fs.Attr.u,
1879	pCtx->gs.Sel, pCtx->gs.u64Base, pCtx->gs.u32Limit, pCtx->gs.Attr.u,
1880	pCtx->ss.Sel, pCtx->ss.u64Base, pCtx->ss.u32Limit, pCtx->ss.Attr.u,
1881	pCtx->cr0, pCtx->cr2, pCtx->cr3, pCtx->cr4,
1882	pCtx->dr[0], pCtx->dr[1], pCtx->dr[2], pCtx->dr[3],
1883	pCtx->dr[4], pCtx->dr[5], pCtx->dr[6], pCtx->dr[7],
1884	pCtx->gdtr.pGdt, pCtx->gdtr.cbGdt, pCtx->idtr.pIdt, pCtx->idtr.cbIdt, fEFlags,
1885	pCtx->ldtr.Sel, pCtx->ldtr.u64Base, pCtx->ldtr.u32Limit, pCtx->ldtr.Attr.u,
1886	pCtx->tr.Sel, pCtx->tr.u64Base, pCtx->tr.u32Limit, pCtx->tr.Attr.u,
1887	pCtx->SysEnter.cs, pCtx->SysEnter.eip, pCtx->SysEnter.esp));
1888	else
1889	Log(("eax=%08x ebx=%08x ecx=%08x edx=%08x esi=%08x edi=%08x\n"
1890	"eip=%08x esp=%08x ebp=%08x iopl=%d %*s\n"
1891	"cs={%04x base=%016RX64 limit=%08x flags=%08x} dr0=%08RX64 dr1=%08RX64\n"
1892	"ds={%04x base=%016RX64 limit=%08x flags=%08x} dr2=%08RX64 dr3=%08RX64\n"
1893	"es={%04x base=%016RX64 limit=%08x flags=%08x} dr4=%08RX64 dr5=%08RX64\n"
1894	"fs={%04x base=%016RX64 limit=%08x flags=%08x} dr6=%08RX64 dr7=%08RX64\n"
1895	"gs={%04x base=%016RX64 limit=%08x flags=%08x} cr0=%08RX64 cr2=%08RX64\n"
1896	"ss={%04x base=%016RX64 limit=%08x flags=%08x} cr3=%08RX64 cr4=%08RX64\n"
1897	"gdtr=%016RX64:%04x idtr=%016RX64:%04x eflags=%08x\n"
1898	"ldtr={%04x base=%08RX64 limit=%08x flags=%08x}\n"
1899	"tr ={%04x base=%08RX64 limit=%08x flags=%08x}\n"
1900	"SysEnter={cs=%04llx eip=%08llx esp=%08llx}\n"
1901	,
1902	pCtx->eax, pCtx->ebx, pCtx->ecx, pCtx->edx, pCtx->esi, pCtx->edi,
1903	pCtx->eip, pCtx->esp, pCtx->ebp, X86_EFL_GET_IOPL(fEFlags), 31, szEFlags,
1904	pCtx->cs.Sel, pCtx->cs.u64Base, pCtx->cs.u32Limit, pCtx->cs.Attr.u, pCtx->dr[0], pCtx->dr[1],
1905	pCtx->ds.Sel, pCtx->ds.u64Base, pCtx->ds.u32Limit, pCtx->ds.Attr.u, pCtx->dr[2], pCtx->dr[3],
1906	pCtx->es.Sel, pCtx->es.u64Base, pCtx->es.u32Limit, pCtx->es.Attr.u, pCtx->dr[4], pCtx->dr[5],
1907	pCtx->fs.Sel, pCtx->fs.u64Base, pCtx->fs.u32Limit, pCtx->fs.Attr.u, pCtx->dr[6], pCtx->dr[7],
1908	pCtx->gs.Sel, pCtx->gs.u64Base, pCtx->gs.u32Limit, pCtx->gs.Attr.u, pCtx->cr0, pCtx->cr2,
1909	pCtx->ss.Sel, pCtx->ss.u64Base, pCtx->ss.u32Limit, pCtx->ss.Attr.u, pCtx->cr3, pCtx->cr4,
1910	pCtx->gdtr.pGdt, pCtx->gdtr.cbGdt, pCtx->idtr.pIdt, pCtx->idtr.cbIdt, fEFlags,
1911	pCtx->ldtr.Sel, pCtx->ldtr.u64Base, pCtx->ldtr.u32Limit, pCtx->ldtr.Attr.u,
1912	pCtx->tr.Sel, pCtx->tr.u64Base, pCtx->tr.u32Limit, pCtx->tr.Attr.u,
1913	pCtx->SysEnter.cs, pCtx->SysEnter.eip, pCtx->SysEnter.esp));
1914	}
1915
1916	if (fFlags & HM_DUMP_REG_FLAGS_FPU)
1917	{
1918	PCX86FXSTATE pFpuCtx = &pCtx->XState.x87;
1919	Log(("FPU:\n"
1920	"FCW=%04x FSW=%04x FTW=%02x\n"
1921	"FOP=%04x FPUIP=%08x CS=%04x Rsrvd1=%04x\n"
1922	"FPUDP=%04x DS=%04x Rsvrd2=%04x MXCSR=%08x MXCSR_MASK=%08x\n"
1923	,
1924	pFpuCtx->FCW, pFpuCtx->FSW, pFpuCtx->FTW,
1925	pFpuCtx->FOP, pFpuCtx->FPUIP, pFpuCtx->CS, pFpuCtx->Rsrvd1,
1926	pFpuCtx->FPUDP, pFpuCtx->DS, pFpuCtx->Rsrvd2,
1927	pFpuCtx->MXCSR, pFpuCtx->MXCSR_MASK));
1928	NOREF(pFpuCtx);
1929	}
1930
1931	if (fFlags & HM_DUMP_REG_FLAGS_MSRS)
1932	Log(("MSR:\n"
1933	"EFER =%016RX64\n"
1934	"PAT =%016RX64\n"
1935	"STAR =%016RX64\n"
1936	"CSTAR =%016RX64\n"
1937	"LSTAR =%016RX64\n"
1938	"SFMASK =%016RX64\n"
1939	"KERNELGSBASE =%016RX64\n",
1940	pCtx->msrEFER,
1941	pCtx->msrPAT,
1942	pCtx->msrSTAR,
1943	pCtx->msrCSTAR,
1944	pCtx->msrLSTAR,
1945	pCtx->msrSFMASK,
1946	pCtx->msrKERNELGSBASE));
1947	}
1948
1949	#endif /* VBOX_STRICT */
1950

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source: vbox/trunk/src/VBox/VMM/VMMR0/HMR0.cpp@ 97229

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