VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMAll/PGMAllHandler.cpp@ 72064

Last change on this file since 72064 was 71043, checked in by vboxsync, 7 years ago

NEM: More code - PoC kind of working now. bugref:9044
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File size: 88.2 KB
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1/* $Id: PGMAllHandler.cpp 71043 2018-02-16 20:48:42Z vboxsync $ */
2/** @file
3 * PGM - Page Manager / Monitor, Access Handlers.
4 */
5
6/*
7 * Copyright (C) 2006-2017 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18
19/*********************************************************************************************************************************
20* Header Files *
21*********************************************************************************************************************************/
22#define LOG_GROUP LOG_GROUP_PGM
23#include <VBox/vmm/dbgf.h>
24#include <VBox/vmm/pgm.h>
25#include <VBox/vmm/iom.h>
26#include <VBox/vmm/mm.h>
27#include <VBox/vmm/em.h>
28#include <VBox/vmm/nem.h>
29#include <VBox/vmm/stam.h>
30#ifdef VBOX_WITH_REM
31# include <VBox/vmm/rem.h>
32#endif
33#include <VBox/vmm/dbgf.h>
34#include "PGMInternal.h"
35#include <VBox/vmm/vm.h>
36#include "PGMInline.h"
37
38#include <VBox/log.h>
39#include <iprt/assert.h>
40#include <iprt/asm-amd64-x86.h>
41#include <iprt/string.h>
42#include <VBox/param.h>
43#include <VBox/err.h>
44#include <VBox/vmm/selm.h>
45
46
47/*********************************************************************************************************************************
48* Internal Functions *
49*********************************************************************************************************************************/
50static int pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs(PVM pVM, PPGMPHYSHANDLER pCur, PPGMRAMRANGE pRam);
51static void pgmHandlerPhysicalDeregisterNotifyREMAndNEM(PVM pVM, PPGMPHYSHANDLER pCur, int fRestoreRAM);
52static void pgmHandlerPhysicalResetRamFlags(PVM pVM, PPGMPHYSHANDLER pCur);
53
54
55/**
56 * Internal worker for releasing a physical handler type registration reference.
57 *
58 * @returns New reference count. UINT32_MAX if invalid input (asserted).
59 * @param pVM The cross context VM structure.
60 * @param pType Pointer to the type registration.
61 */
62DECLINLINE(uint32_t) pgmHandlerPhysicalTypeRelease(PVM pVM, PPGMPHYSHANDLERTYPEINT pType)
63{
64 AssertMsgReturn(pType->u32Magic == PGMPHYSHANDLERTYPEINT_MAGIC, ("%#x\n", pType->u32Magic), UINT32_MAX);
65 uint32_t cRefs = ASMAtomicDecU32(&pType->cRefs);
66 if (cRefs == 0)
67 {
68 pgmLock(pVM);
69 pType->u32Magic = PGMPHYSHANDLERTYPEINT_MAGIC_DEAD;
70 RTListOff32NodeRemove(&pType->ListNode);
71 pgmUnlock(pVM);
72 MMHyperFree(pVM, pType);
73 }
74 return cRefs;
75}
76
77
78/**
79 * Internal worker for retaining a physical handler type registration reference.
80 *
81 * @returns New reference count. UINT32_MAX if invalid input (asserted).
82 * @param pVM The cross context VM structure.
83 * @param pType Pointer to the type registration.
84 */
85DECLINLINE(uint32_t) pgmHandlerPhysicalTypeRetain(PVM pVM, PPGMPHYSHANDLERTYPEINT pType)
86{
87 NOREF(pVM);
88 AssertMsgReturn(pType->u32Magic == PGMPHYSHANDLERTYPEINT_MAGIC, ("%#x\n", pType->u32Magic), UINT32_MAX);
89 uint32_t cRefs = ASMAtomicIncU32(&pType->cRefs);
90 Assert(cRefs < _1M && cRefs > 0);
91 return cRefs;
92}
93
94
95/**
96 * Releases a reference to a physical handler type registration.
97 *
98 * @returns New reference count. UINT32_MAX if invalid input (asserted).
99 * @param pVM The cross context VM structure.
100 * @param hType The type regiration handle.
101 */
102VMMDECL(uint32_t) PGMHandlerPhysicalTypeRelease(PVM pVM, PGMPHYSHANDLERTYPE hType)
103{
104 if (hType != NIL_PGMPHYSHANDLERTYPE)
105 return pgmHandlerPhysicalTypeRelease(pVM, PGMPHYSHANDLERTYPEINT_FROM_HANDLE(pVM, hType));
106 return 0;
107}
108
109
110/**
111 * Retains a reference to a physical handler type registration.
112 *
113 * @returns New reference count. UINT32_MAX if invalid input (asserted).
114 * @param pVM The cross context VM structure.
115 * @param hType The type regiration handle.
116 */
117VMMDECL(uint32_t) PGMHandlerPhysicalTypeRetain(PVM pVM, PGMPHYSHANDLERTYPE hType)
118{
119 return pgmHandlerPhysicalTypeRetain(pVM, PGMPHYSHANDLERTYPEINT_FROM_HANDLE(pVM, hType));
120}
121
122
123/**
124 * Creates a physical access handler.
125 *
126 * @returns VBox status code.
127 * @retval VINF_SUCCESS when successfully installed.
128 * @retval VINF_PGM_GCPHYS_ALIASED when the shadow PTs could be updated because
129 * the guest page aliased or/and mapped by multiple PTs. A CR3 sync has been
130 * flagged together with a pool clearing.
131 * @retval VERR_PGM_HANDLER_PHYSICAL_CONFLICT if the range conflicts with an existing
132 * one. A debug assertion is raised.
133 *
134 * @param pVM The cross context VM structure.
135 * @param hType The handler type registration handle.
136 * @param pvUserR3 User argument to the R3 handler.
137 * @param pvUserR0 User argument to the R0 handler.
138 * @param pvUserRC User argument to the RC handler. This can be a value
139 * less that 0x10000 or a (non-null) pointer that is
140 * automatically relocated.
141 * @param pszDesc Description of this handler. If NULL, the type
142 * description will be used instead.
143 * @param ppPhysHandler Where to return the access handler structure on
144 * success.
145 */
146int pgmHandlerPhysicalExCreate(PVM pVM, PGMPHYSHANDLERTYPE hType, RTR3PTR pvUserR3, RTR0PTR pvUserR0, RTRCPTR pvUserRC,
147 R3PTRTYPE(const char *) pszDesc, PPGMPHYSHANDLER *ppPhysHandler)
148{
149 PPGMPHYSHANDLERTYPEINT pType = PGMPHYSHANDLERTYPEINT_FROM_HANDLE(pVM, hType);
150 Log(("pgmHandlerPhysicalExCreate: pvUserR3=%RHv pvUserR0=%RHv pvUserGC=%RRv hType=%#x (%d, %s) pszDesc=%RHv:%s\n",
151 pvUserR3, pvUserR0, pvUserRC, hType, pType->enmKind, R3STRING(pType->pszDesc), pszDesc, R3STRING(pszDesc)));
152
153 /*
154 * Validate input.
155 */
156 AssertPtr(ppPhysHandler);
157 AssertReturn(pType->u32Magic == PGMPHYSHANDLERTYPEINT_MAGIC, VERR_INVALID_HANDLE);
158 AssertMsgReturn( (RTRCUINTPTR)pvUserRC < 0x10000
159 || MMHyperR3ToRC(pVM, MMHyperRCToR3(pVM, pvUserRC)) == pvUserRC,
160 ("Not RC pointer! pvUserRC=%RRv\n", pvUserRC),
161 VERR_INVALID_PARAMETER);
162 AssertMsgReturn( (RTR0UINTPTR)pvUserR0 < 0x10000
163 || MMHyperR3ToR0(pVM, MMHyperR0ToR3(pVM, pvUserR0)) == pvUserR0,
164 ("Not R0 pointer! pvUserR0=%RHv\n", pvUserR0),
165 VERR_INVALID_PARAMETER);
166
167 /*
168 * Allocate and initialize the new entry.
169 */
170 PPGMPHYSHANDLER pNew;
171 int rc = MMHyperAlloc(pVM, sizeof(*pNew), 0, MM_TAG_PGM_HANDLERS, (void **)&pNew);
172 if (RT_SUCCESS(rc))
173 {
174 pNew->Core.Key = NIL_RTGCPHYS;
175 pNew->Core.KeyLast = NIL_RTGCPHYS;
176 pNew->cPages = 0;
177 pNew->cAliasedPages = 0;
178 pNew->cTmpOffPages = 0;
179 pNew->pvUserR3 = pvUserR3;
180 pNew->pvUserR0 = pvUserR0;
181 pNew->pvUserRC = pvUserRC;
182 pNew->hType = hType;
183 pNew->pszDesc = pszDesc != NIL_RTR3PTR ? pszDesc : pType->pszDesc;
184 pgmHandlerPhysicalTypeRetain(pVM, pType);
185 *ppPhysHandler = pNew;
186 return VINF_SUCCESS;
187 }
188
189 return rc;
190}
191
192
193/**
194 * Duplicates a physical access handler.
195 *
196 * @returns VBox status code.
197 * @retval VINF_SUCCESS when successfully installed.
198 *
199 * @param pVM The cross context VM structure.
200 * @param pPhysHandlerSrc The source handler to duplicate
201 * @param ppPhysHandler Where to return the access handler structure on
202 * success.
203 */
204int pgmHandlerPhysicalExDup(PVM pVM, PPGMPHYSHANDLER pPhysHandlerSrc, PPGMPHYSHANDLER *ppPhysHandler)
205{
206 return pgmHandlerPhysicalExCreate(pVM,
207 pPhysHandlerSrc->hType,
208 pPhysHandlerSrc->pvUserR3,
209 pPhysHandlerSrc->pvUserR0,
210 pPhysHandlerSrc->pvUserRC,
211 pPhysHandlerSrc->pszDesc,
212 ppPhysHandler);
213}
214
215
216/**
217 * Register a access handler for a physical range.
218 *
219 * @returns VBox status code.
220 * @retval VINF_SUCCESS when successfully installed.
221 *
222 * @param pVM The cross context VM structure.
223 * @param pPhysHandler The physical handler.
224 * @param GCPhys Start physical address.
225 * @param GCPhysLast Last physical address. (inclusive)
226 */
227int pgmHandlerPhysicalExRegister(PVM pVM, PPGMPHYSHANDLER pPhysHandler, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast)
228{
229 /*
230 * Validate input.
231 */
232 AssertPtr(pPhysHandler);
233 PPGMPHYSHANDLERTYPEINT pType = PGMPHYSHANDLERTYPEINT_FROM_HANDLE(pVM, pPhysHandler->hType);
234 Assert(pType->u32Magic == PGMPHYSHANDLERTYPEINT_MAGIC);
235 Log(("pgmHandlerPhysicalExRegister: GCPhys=%RGp GCPhysLast=%RGp hType=%#x (%d, %s) pszDesc=%RHv:%s\n",
236 GCPhys, GCPhysLast, pPhysHandler->hType, pType->enmKind, R3STRING(pType->pszDesc), pPhysHandler->pszDesc, R3STRING(pPhysHandler->pszDesc)));
237 AssertReturn(pPhysHandler->Core.Key == NIL_RTGCPHYS, VERR_WRONG_ORDER);
238
239 AssertMsgReturn(GCPhys < GCPhysLast, ("GCPhys >= GCPhysLast (%#x >= %#x)\n", GCPhys, GCPhysLast), VERR_INVALID_PARAMETER);
240 switch (pType->enmKind)
241 {
242 case PGMPHYSHANDLERKIND_WRITE:
243 break;
244 case PGMPHYSHANDLERKIND_MMIO:
245 case PGMPHYSHANDLERKIND_ALL:
246 /* Simplification for PGMPhysRead, PGMR0Trap0eHandlerNPMisconfig and others: Full pages. */
247 AssertMsgReturn(!(GCPhys & PAGE_OFFSET_MASK), ("%RGp\n", GCPhys), VERR_INVALID_PARAMETER);
248 AssertMsgReturn((GCPhysLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK, ("%RGp\n", GCPhysLast), VERR_INVALID_PARAMETER);
249 break;
250 default:
251 AssertMsgFailed(("Invalid input enmKind=%d!\n", pType->enmKind));
252 return VERR_INVALID_PARAMETER;
253 }
254
255 /*
256 * We require the range to be within registered ram.
257 * There is no apparent need to support ranges which cover more than one ram range.
258 */
259 PPGMRAMRANGE pRam = pgmPhysGetRange(pVM, GCPhys);
260 if ( !pRam
261 || GCPhysLast > pRam->GCPhysLast)
262 {
263#ifdef IN_RING3
264 DBGFR3Info(pVM->pUVM, "phys", NULL, NULL);
265#endif
266 AssertMsgFailed(("No RAM range for %RGp-%RGp\n", GCPhys, GCPhysLast));
267 return VERR_PGM_HANDLER_PHYSICAL_NO_RAM_RANGE;
268 }
269 Assert(GCPhys >= pRam->GCPhys && GCPhys < pRam->GCPhysLast);
270 Assert(GCPhysLast <= pRam->GCPhysLast && GCPhysLast >= pRam->GCPhys);
271
272 /*
273 * Try insert into list.
274 */
275 pPhysHandler->Core.Key = GCPhys;
276 pPhysHandler->Core.KeyLast = GCPhysLast;
277 pPhysHandler->cPages = (GCPhysLast - (GCPhys & X86_PTE_PAE_PG_MASK) + PAGE_SIZE) >> PAGE_SHIFT;
278
279 pgmLock(pVM);
280 if (RTAvlroGCPhysInsert(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, &pPhysHandler->Core))
281 {
282 int rc = pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs(pVM, pPhysHandler, pRam);
283 if (rc == VINF_PGM_SYNC_CR3)
284 rc = VINF_PGM_GCPHYS_ALIASED;
285
286#if defined(IN_RING3) || defined(IN_RING0)
287 NEMHCNotifyHandlerPhysicalRegister(pVM, pType->enmKind, GCPhys, GCPhysLast - GCPhys + 1);
288#endif
289 pgmUnlock(pVM);
290
291#ifdef VBOX_WITH_REM
292# ifndef IN_RING3
293 REMNotifyHandlerPhysicalRegister(pVM, pType->enmKind, GCPhys, GCPhysLast - GCPhys + 1, !!pType->pfnHandlerR3);
294# else
295 REMR3NotifyHandlerPhysicalRegister(pVM, pType->enmKind, GCPhys, GCPhysLast - GCPhys + 1, !!pType->pfnHandlerR3);
296# endif
297#endif
298 if (rc != VINF_SUCCESS)
299 Log(("PGMHandlerPhysicalRegisterEx: returns %Rrc (%RGp-%RGp)\n", rc, GCPhys, GCPhysLast));
300 return rc;
301 }
302 pgmUnlock(pVM);
303
304 pPhysHandler->Core.Key = NIL_RTGCPHYS;
305 pPhysHandler->Core.KeyLast = NIL_RTGCPHYS;
306
307#if defined(IN_RING3) && defined(VBOX_STRICT)
308 DBGFR3Info(pVM->pUVM, "handlers", "phys nostats", NULL);
309#endif
310 AssertMsgFailed(("Conflict! GCPhys=%RGp GCPhysLast=%RGp pszDesc=%s/%s\n",
311 GCPhys, GCPhysLast, R3STRING(pPhysHandler->pszDesc), R3STRING(pType->pszDesc)));
312 return VERR_PGM_HANDLER_PHYSICAL_CONFLICT;
313}
314
315
316/**
317 * Register a access handler for a physical range.
318 *
319 * @returns VBox status code.
320 * @retval VINF_SUCCESS when successfully installed.
321 * @retval VINF_PGM_GCPHYS_ALIASED when the shadow PTs could be updated because
322 * the guest page aliased or/and mapped by multiple PTs. A CR3 sync has been
323 * flagged together with a pool clearing.
324 * @retval VERR_PGM_HANDLER_PHYSICAL_CONFLICT if the range conflicts with an existing
325 * one. A debug assertion is raised.
326 *
327 * @param pVM The cross context VM structure.
328 * @param GCPhys Start physical address.
329 * @param GCPhysLast Last physical address. (inclusive)
330 * @param hType The handler type registration handle.
331 * @param pvUserR3 User argument to the R3 handler.
332 * @param pvUserR0 User argument to the R0 handler.
333 * @param pvUserRC User argument to the RC handler. This can be a value
334 * less that 0x10000 or a (non-null) pointer that is
335 * automatically relocated.
336 * @param pszDesc Description of this handler. If NULL, the type
337 * description will be used instead.
338 */
339VMMDECL(int) PGMHandlerPhysicalRegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast, PGMPHYSHANDLERTYPE hType,
340 RTR3PTR pvUserR3, RTR0PTR pvUserR0, RTRCPTR pvUserRC, R3PTRTYPE(const char *) pszDesc)
341{
342#ifdef LOG_ENABLED
343 PPGMPHYSHANDLERTYPEINT pType = PGMPHYSHANDLERTYPEINT_FROM_HANDLE(pVM, hType);
344 Log(("PGMHandlerPhysicalRegister: GCPhys=%RGp GCPhysLast=%RGp pvUserR3=%RHv pvUserR0=%RHv pvUserGC=%RRv hType=%#x (%d, %s) pszDesc=%RHv:%s\n",
345 GCPhys, GCPhysLast, pvUserR3, pvUserR0, pvUserRC, hType, pType->enmKind, R3STRING(pType->pszDesc), pszDesc, R3STRING(pszDesc)));
346#endif
347
348 PPGMPHYSHANDLER pNew;
349 int rc = pgmHandlerPhysicalExCreate(pVM, hType, pvUserR3, pvUserR0, pvUserRC, pszDesc, &pNew);
350 if (RT_SUCCESS(rc))
351 {
352 rc = pgmHandlerPhysicalExRegister(pVM, pNew, GCPhys, GCPhysLast);
353 if (RT_SUCCESS(rc))
354 return rc;
355 pgmHandlerPhysicalExDestroy(pVM, pNew);
356 }
357 return rc;
358}
359
360
361/**
362 * Sets ram range flags and attempts updating shadow PTs.
363 *
364 * @returns VBox status code.
365 * @retval VINF_SUCCESS when shadow PTs was successfully updated.
366 * @retval VINF_PGM_SYNC_CR3 when the shadow PTs could be updated because
367 * the guest page aliased or/and mapped by multiple PTs. FFs set.
368 * @param pVM The cross context VM structure.
369 * @param pCur The physical handler.
370 * @param pRam The RAM range.
371 */
372static int pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs(PVM pVM, PPGMPHYSHANDLER pCur, PPGMRAMRANGE pRam)
373{
374 /*
375 * Iterate the guest ram pages updating the flags and flushing PT entries
376 * mapping the page.
377 */
378 bool fFlushTLBs = false;
379 int rc = VINF_SUCCESS;
380 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
381 const unsigned uState = pCurType->uState;
382 uint32_t cPages = pCur->cPages;
383 uint32_t i = (pCur->Core.Key - pRam->GCPhys) >> PAGE_SHIFT;
384 for (;;)
385 {
386 PPGMPAGE pPage = &pRam->aPages[i];
387 AssertMsg(pCurType->enmKind != PGMPHYSHANDLERKIND_MMIO || PGM_PAGE_IS_MMIO(pPage),
388 ("%RGp %R[pgmpage]\n", pRam->GCPhys + (i << PAGE_SHIFT), pPage));
389
390 /* Only do upgrades. */
391 if (PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) < uState)
392 {
393 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, uState);
394
395 const RTGCPHYS GCPhysPage = pRam->GCPhys + (i << PAGE_SHIFT);
396 int rc2 = pgmPoolTrackUpdateGCPhys(pVM, GCPhysPage, pPage,
397 false /* allow updates of PTEs (instead of flushing) */, &fFlushTLBs);
398 if (rc2 != VINF_SUCCESS && rc == VINF_SUCCESS)
399 rc = rc2;
400
401#ifndef IN_RC
402 /* Tell NEM about the protection update. */
403 if (VM_IS_NEM_ENABLED(pVM))
404 {
405 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
406 PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
407 NEMHCNotifyPhysPageProtChanged(pVM, GCPhysPage, PGM_PAGE_GET_HCPHYS(pPage),
408 pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
409 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
410 }
411#endif
412 }
413
414 /* next */
415 if (--cPages == 0)
416 break;
417 i++;
418 }
419
420 if (fFlushTLBs)
421 {
422 PGM_INVL_ALL_VCPU_TLBS(pVM);
423 Log(("pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs: flushing guest TLBs; rc=%d\n", rc));
424 }
425 else
426 Log(("pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs: doesn't flush guest TLBs. rc=%Rrc; sync flags=%x VMCPU_FF_PGM_SYNC_CR3=%d\n", rc, VMMGetCpu(pVM)->pgm.s.fSyncFlags, VMCPU_FF_IS_SET(VMMGetCpu(pVM), VMCPU_FF_PGM_SYNC_CR3)));
427
428 return rc;
429}
430
431
432/**
433 * Deregister a physical page access handler.
434 *
435 * @returns VBox status code.
436 * @param pVM The cross context VM structure.
437 * @param pPhysHandler The handler to deregister (but not free).
438 * @param fRestoreAsRAM How this will likely be restored, if we know (true,
439 * false, or if we don't know -1).
440 */
441int pgmHandlerPhysicalExDeregister(PVM pVM, PPGMPHYSHANDLER pPhysHandler, int fRestoreAsRAM)
442{
443 LogFlow(("pgmHandlerPhysicalExDeregister: Removing Range %RGp-%RGp %s fRestoreAsRAM=%d\n",
444 pPhysHandler->Core.Key, pPhysHandler->Core.KeyLast, R3STRING(pPhysHandler->pszDesc), fRestoreAsRAM));
445 AssertReturn(pPhysHandler->Core.Key != NIL_RTGCPHYS, VERR_PGM_HANDLER_NOT_FOUND);
446
447 /*
448 * Remove the handler from the tree.
449 */
450 pgmLock(pVM);
451 PPGMPHYSHANDLER pRemoved = (PPGMPHYSHANDLER)RTAvlroGCPhysRemove(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers,
452 pPhysHandler->Core.Key);
453 if (pRemoved == pPhysHandler)
454 {
455 /*
456 * Clear the page bits, notify the REM about this change and clear
457 * the cache.
458 */
459 pgmHandlerPhysicalResetRamFlags(pVM, pPhysHandler);
460 pgmHandlerPhysicalDeregisterNotifyREMAndNEM(pVM, pPhysHandler, fRestoreAsRAM);
461 pVM->pgm.s.pLastPhysHandlerR0 = 0;
462 pVM->pgm.s.pLastPhysHandlerR3 = 0;
463 pVM->pgm.s.pLastPhysHandlerRC = 0;
464
465 pPhysHandler->Core.Key = NIL_RTGCPHYS;
466 pPhysHandler->Core.KeyLast = NIL_RTGCPHYS;
467
468 pgmUnlock(pVM);
469
470 return VINF_SUCCESS;
471 }
472
473 /*
474 * Both of the failure conditions here are considered internal processing
475 * errors because they can only be caused by race conditions or corruption.
476 * If we ever need to handle concurrent deregistration, we have to move
477 * the NIL_RTGCPHYS check inside the PGM lock.
478 */
479 if (pRemoved)
480 RTAvlroGCPhysInsert(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, &pRemoved->Core);
481
482 pgmUnlock(pVM);
483
484 if (!pRemoved)
485 AssertMsgFailed(("Didn't find range starting at %RGp in the tree!\n", pPhysHandler->Core.Key));
486 else
487 AssertMsgFailed(("Found different handle at %RGp in the tree: got %p insteaded of %p\n",
488 pPhysHandler->Core.Key, pRemoved, pPhysHandler));
489 return VERR_PGM_HANDLER_IPE_1;
490}
491
492
493/**
494 * Destroys (frees) a physical handler.
495 *
496 * The caller must deregister it before destroying it!
497 *
498 * @returns VBox status code.
499 * @param pVM The cross context VM structure.
500 * @param pHandler The handler to free. NULL if ignored.
501 */
502int pgmHandlerPhysicalExDestroy(PVM pVM, PPGMPHYSHANDLER pHandler)
503{
504 if (pHandler)
505 {
506 AssertPtr(pHandler);
507 AssertReturn(pHandler->Core.Key == NIL_RTGCPHYS, VERR_WRONG_ORDER);
508 PGMHandlerPhysicalTypeRelease(pVM, pHandler->hType);
509 MMHyperFree(pVM, pHandler);
510 }
511 return VINF_SUCCESS;
512}
513
514
515/**
516 * Deregister a physical page access handler.
517 *
518 * @returns VBox status code.
519 * @param pVM The cross context VM structure.
520 * @param GCPhys Start physical address.
521 */
522VMMDECL(int) PGMHandlerPhysicalDeregister(PVM pVM, RTGCPHYS GCPhys)
523{
524 /*
525 * Find the handler.
526 */
527 pgmLock(pVM);
528 PPGMPHYSHANDLER pRemoved = (PPGMPHYSHANDLER)RTAvlroGCPhysRemove(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
529 if (pRemoved)
530 {
531 LogFlow(("PGMHandlerPhysicalDeregister: Removing Range %RGp-%RGp %s\n",
532 pRemoved->Core.Key, pRemoved->Core.KeyLast, R3STRING(pRemoved->pszDesc)));
533
534 /*
535 * Clear the page bits, notify the REM about this change and clear
536 * the cache.
537 */
538 pgmHandlerPhysicalResetRamFlags(pVM, pRemoved);
539 pgmHandlerPhysicalDeregisterNotifyREMAndNEM(pVM, pRemoved, -1);
540 pVM->pgm.s.pLastPhysHandlerR0 = 0;
541 pVM->pgm.s.pLastPhysHandlerR3 = 0;
542 pVM->pgm.s.pLastPhysHandlerRC = 0;
543
544 pgmUnlock(pVM);
545
546 pRemoved->Core.Key = NIL_RTGCPHYS;
547 pgmHandlerPhysicalExDestroy(pVM, pRemoved);
548 return VINF_SUCCESS;
549 }
550
551 pgmUnlock(pVM);
552
553 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhys));
554 return VERR_PGM_HANDLER_NOT_FOUND;
555}
556
557
558/**
559 * Shared code with modify.
560 */
561static void pgmHandlerPhysicalDeregisterNotifyREMAndNEM(PVM pVM, PPGMPHYSHANDLER pCur, int fRestoreAsRAM)
562{
563 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
564 RTGCPHYS GCPhysStart = pCur->Core.Key;
565 RTGCPHYS GCPhysLast = pCur->Core.KeyLast;
566
567 /*
568 * Page align the range.
569 *
570 * Since we've reset (recalculated) the physical handler state of all pages
571 * we can make use of the page states to figure out whether a page should be
572 * included in the REM notification or not.
573 */
574 if ( (pCur->Core.Key & PAGE_OFFSET_MASK)
575 || ((pCur->Core.KeyLast + 1) & PAGE_OFFSET_MASK))
576 {
577 Assert(pCurType->enmKind != PGMPHYSHANDLERKIND_MMIO);
578
579 if (GCPhysStart & PAGE_OFFSET_MASK)
580 {
581 PPGMPAGE pPage = pgmPhysGetPage(pVM, GCPhysStart);
582 if ( pPage
583 && PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) != PGM_PAGE_HNDL_PHYS_STATE_NONE)
584 {
585 RTGCPHYS GCPhys = (GCPhysStart + (PAGE_SIZE - 1)) & X86_PTE_PAE_PG_MASK;
586 if ( GCPhys > GCPhysLast
587 || GCPhys < GCPhysStart)
588 return;
589 GCPhysStart = GCPhys;
590 }
591 else
592 GCPhysStart &= X86_PTE_PAE_PG_MASK;
593 Assert(!pPage || PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO); /* these are page aligned atm! */
594 }
595
596 if (GCPhysLast & PAGE_OFFSET_MASK)
597 {
598 PPGMPAGE pPage = pgmPhysGetPage(pVM, GCPhysLast);
599 if ( pPage
600 && PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) != PGM_PAGE_HNDL_PHYS_STATE_NONE)
601 {
602 RTGCPHYS GCPhys = (GCPhysLast & X86_PTE_PAE_PG_MASK) - 1;
603 if ( GCPhys < GCPhysStart
604 || GCPhys > GCPhysLast)
605 return;
606 GCPhysLast = GCPhys;
607 }
608 else
609 GCPhysLast |= PAGE_OFFSET_MASK;
610 Assert(!pPage || PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO); /* these are page aligned atm! */
611 }
612 }
613
614 /*
615 * Tell REM and NEM.
616 */
617 const bool fRestoreAsRAM2 = pCurType->pfnHandlerR3
618 && pCurType->enmKind != PGMPHYSHANDLERKIND_MMIO; /** @todo this isn't entirely correct. */
619#ifdef VBOX_WITH_REM
620# ifndef IN_RING3
621 REMNotifyHandlerPhysicalDeregister(pVM, pCurType->enmKind, GCPhysStart, GCPhysLast - GCPhysStart + 1,
622 !!pCurType->pfnHandlerR3, fRestoreAsRAM2);
623# else
624 REMR3NotifyHandlerPhysicalDeregister(pVM, pCurType->enmKind, GCPhysStart, GCPhysLast - GCPhysStart + 1,
625 !!pCurType->pfnHandlerR3, fRestoreAsRAM2);
626# endif
627#endif
628 /** @todo do we need this notification? */
629#if defined(IN_RING3) || defined(IN_RING0)
630 NEMHCNotifyHandlerPhysicalDeregister(pVM, pCurType->enmKind, GCPhysStart, GCPhysLast - GCPhysStart + 1,
631 fRestoreAsRAM, fRestoreAsRAM2);
632#else
633 RT_NOREF_PV(fRestoreAsRAM); /** @todo this needs more work for REM! */
634#endif
635}
636
637
638/**
639 * pgmHandlerPhysicalResetRamFlags helper that checks for other handlers on
640 * edge pages.
641 */
642DECLINLINE(void) pgmHandlerPhysicalRecalcPageState(PVM pVM, RTGCPHYS GCPhys, bool fAbove, PPGMRAMRANGE *ppRamHint)
643{
644 /*
645 * Look for other handlers.
646 */
647 unsigned uState = PGM_PAGE_HNDL_PHYS_STATE_NONE;
648 for (;;)
649 {
650 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGetBestFit(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys, fAbove);
651 if ( !pCur
652 || ((fAbove ? pCur->Core.Key : pCur->Core.KeyLast) >> PAGE_SHIFT) != (GCPhys >> PAGE_SHIFT))
653 break;
654 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
655 uState = RT_MAX(uState, pCurType->uState);
656
657 /* next? */
658 RTGCPHYS GCPhysNext = fAbove
659 ? pCur->Core.KeyLast + 1
660 : pCur->Core.Key - 1;
661 if ((GCPhysNext >> PAGE_SHIFT) != (GCPhys >> PAGE_SHIFT))
662 break;
663 GCPhys = GCPhysNext;
664 }
665
666 /*
667 * Update if we found something that is a higher priority
668 * state than the current.
669 */
670 if (uState != PGM_PAGE_HNDL_PHYS_STATE_NONE)
671 {
672 PPGMPAGE pPage;
673 int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, ppRamHint);
674 if ( RT_SUCCESS(rc)
675 && PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) < uState)
676 {
677 /* This should normally not be necessary. */
678 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, uState);
679 bool fFlushTLBs ;
680 rc = pgmPoolTrackUpdateGCPhys(pVM, GCPhys, pPage, false /*fFlushPTEs*/, &fFlushTLBs);
681 if (RT_SUCCESS(rc) && fFlushTLBs)
682 PGM_INVL_ALL_VCPU_TLBS(pVM);
683 else
684 AssertRC(rc);
685
686#ifndef IN_RC
687 /* Tell NEM about the protection update. */
688 if (VM_IS_NEM_ENABLED(pVM))
689 {
690 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
691 PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
692 NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage),
693 pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
694 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
695 }
696#endif
697 }
698 else
699 AssertRC(rc);
700 }
701}
702
703
704/**
705 * Resets an aliased page.
706 *
707 * @param pVM The cross context VM structure.
708 * @param pPage The page.
709 * @param GCPhysPage The page address in case it comes in handy.
710 * @param fDoAccounting Whether to perform accounting. (Only set during
711 * reset where pgmR3PhysRamReset doesn't have the
712 * handler structure handy.)
713 */
714void pgmHandlerPhysicalResetAliasedPage(PVM pVM, PPGMPAGE pPage, RTGCPHYS GCPhysPage, bool fDoAccounting)
715{
716 Assert( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO
717 || PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO);
718 Assert(PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) == PGM_PAGE_HNDL_PHYS_STATE_DISABLED);
719#ifndef IN_RC
720 RTHCPHYS const HCPhysPrev = PGM_PAGE_GET_HCPHYS(pPage);
721#endif
722
723 /*
724 * Flush any shadow page table references *first*.
725 */
726 bool fFlushTLBs = false;
727 int rc = pgmPoolTrackUpdateGCPhys(pVM, GCPhysPage, pPage, true /*fFlushPTEs*/, &fFlushTLBs);
728 AssertLogRelRCReturnVoid(rc);
729#ifdef IN_RC
730 if (fFlushTLBs && rc != VINF_PGM_SYNC_CR3)
731 PGM_INVL_VCPU_TLBS(VMMGetCpu0(pVM));
732#else
733 HMFlushTLBOnAllVCpus(pVM);
734#endif
735
736 /*
737 * Make it an MMIO/Zero page.
738 */
739 PGM_PAGE_SET_HCPHYS(pVM, pPage, pVM->pgm.s.HCPhysZeroPg);
740 PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_MMIO);
741 PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ZERO);
742 PGM_PAGE_SET_PAGEID(pVM, pPage, NIL_GMM_PAGEID);
743 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_ALL);
744
745 /* Flush its TLB entry. */
746 pgmPhysInvalidatePageMapTLBEntry(pVM, GCPhysPage);
747
748 /*
749 * Do accounting for pgmR3PhysRamReset.
750 */
751 if (fDoAccounting)
752 {
753 PPGMPHYSHANDLER pHandler = pgmHandlerPhysicalLookup(pVM, GCPhysPage);
754 if (RT_LIKELY(pHandler))
755 {
756 Assert(pHandler->cAliasedPages > 0);
757 pHandler->cAliasedPages--;
758 }
759 else
760 AssertFailed();
761 }
762
763#ifndef IN_RC
764 /*
765 * Tell NEM about the protection change.
766 */
767 if (VM_IS_NEM_ENABLED(pVM))
768 {
769 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
770 NEMHCNotifyPhysPageChanged(pVM, GCPhysPage, HCPhysPrev, pVM->pgm.s.HCPhysZeroPg,
771 NEM_PAGE_PROT_NONE, PGMPAGETYPE_MMIO, &u2State);
772 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
773 }
774#endif
775}
776
777
778/**
779 * Resets ram range flags.
780 *
781 * @returns VBox status code.
782 * @retval VINF_SUCCESS when shadow PTs was successfully updated.
783 * @param pVM The cross context VM structure.
784 * @param pCur The physical handler.
785 *
786 * @remark We don't start messing with the shadow page tables, as we've
787 * already got code in Trap0e which deals with out of sync handler
788 * flags (originally conceived for global pages).
789 */
790static void pgmHandlerPhysicalResetRamFlags(PVM pVM, PPGMPHYSHANDLER pCur)
791{
792 /*
793 * Iterate the guest ram pages updating the state.
794 */
795 RTUINT cPages = pCur->cPages;
796 RTGCPHYS GCPhys = pCur->Core.Key;
797 PPGMRAMRANGE pRamHint = NULL;
798 for (;;)
799 {
800 PPGMPAGE pPage;
801 int rc = pgmPhysGetPageWithHintEx(pVM, GCPhys, &pPage, &pRamHint);
802 if (RT_SUCCESS(rc))
803 {
804 /* Reset aliased MMIO pages to MMIO, since this aliasing is our business.
805 (We don't flip MMIO to RAM though, that's PGMPhys.cpp's job.) */
806 bool fNemNotifiedAlready = false;
807 if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO
808 || PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO)
809 {
810 Assert(pCur->cAliasedPages > 0);
811 pgmHandlerPhysicalResetAliasedPage(pVM, pPage, GCPhys, false /*fDoAccounting*/);
812 pCur->cAliasedPages--;
813 fNemNotifiedAlready = true;
814 }
815#ifdef VBOX_STRICT
816 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
817 AssertMsg(pCurType->enmKind != PGMPHYSHANDLERKIND_MMIO || PGM_PAGE_IS_MMIO(pPage), ("%RGp %R[pgmpage]\n", GCPhys, pPage));
818#endif
819 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_NONE);
820
821#ifndef IN_RC
822 /* Tell NEM about the protection change. */
823 if (VM_IS_NEM_ENABLED(pVM) && !fNemNotifiedAlready)
824 {
825 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
826 PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
827 NEMHCNotifyPhysPageProtChanged(pVM, GCPhys, PGM_PAGE_GET_HCPHYS(pPage),
828 pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
829 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
830 }
831#else
832 RT_NOREF_PV(fNemNotifiedAlready);
833#endif
834 }
835 else
836 AssertRC(rc);
837
838 /* next */
839 if (--cPages == 0)
840 break;
841 GCPhys += PAGE_SIZE;
842 }
843
844 pCur->cAliasedPages = 0;
845 pCur->cTmpOffPages = 0;
846
847 /*
848 * Check for partial start and end pages.
849 */
850 if (pCur->Core.Key & PAGE_OFFSET_MASK)
851 pgmHandlerPhysicalRecalcPageState(pVM, pCur->Core.Key - 1, false /* fAbove */, &pRamHint);
852 if ((pCur->Core.KeyLast & PAGE_OFFSET_MASK) != PAGE_OFFSET_MASK)
853 pgmHandlerPhysicalRecalcPageState(pVM, pCur->Core.KeyLast + 1, true /* fAbove */, &pRamHint);
854}
855
856
857/**
858 * Modify a physical page access handler.
859 *
860 * Modification can only be done to the range it self, not the type or anything else.
861 *
862 * @returns VBox status code.
863 * For all return codes other than VERR_PGM_HANDLER_NOT_FOUND and VINF_SUCCESS the range is deregistered
864 * and a new registration must be performed!
865 * @param pVM The cross context VM structure.
866 * @param GCPhysCurrent Current location.
867 * @param GCPhys New location.
868 * @param GCPhysLast New last location.
869 */
870VMMDECL(int) PGMHandlerPhysicalModify(PVM pVM, RTGCPHYS GCPhysCurrent, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast)
871{
872 /*
873 * Remove it.
874 */
875 int rc;
876 pgmLock(pVM);
877 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysRemove(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhysCurrent);
878 if (pCur)
879 {
880 /*
881 * Clear the ram flags. (We're gonna move or free it!)
882 */
883 pgmHandlerPhysicalResetRamFlags(pVM, pCur);
884#if defined(VBOX_WITH_REM) || defined(IN_RING3) || defined(IN_RING0)
885 PPGMPHYSHANDLERTYPEINT const pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
886 bool const fRestoreAsRAM = pCurType->pfnHandlerR3 /** @todo this isn't entirely correct. */
887 && pCurType->enmKind != PGMPHYSHANDLERKIND_MMIO;
888#endif
889
890 /*
891 * Validate the new range, modify and reinsert.
892 */
893 if (GCPhysLast >= GCPhys)
894 {
895 /*
896 * We require the range to be within registered ram.
897 * There is no apparent need to support ranges which cover more than one ram range.
898 */
899 PPGMRAMRANGE pRam = pgmPhysGetRange(pVM, GCPhys);
900 if ( pRam
901 && GCPhys <= pRam->GCPhysLast
902 && GCPhysLast >= pRam->GCPhys)
903 {
904 pCur->Core.Key = GCPhys;
905 pCur->Core.KeyLast = GCPhysLast;
906 pCur->cPages = (GCPhysLast - (GCPhys & X86_PTE_PAE_PG_MASK) + 1) >> PAGE_SHIFT;
907
908 if (RTAvlroGCPhysInsert(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, &pCur->Core))
909 {
910#if defined(VBOX_WITH_REM) || defined(IN_RING3) || defined(IN_RING0)
911 RTGCPHYS const cb = GCPhysLast - GCPhys + 1;
912 PGMPHYSHANDLERKIND const enmKind = pCurType->enmKind;
913#endif
914#ifdef VBOX_WITH_REM
915 bool const fHasHCHandler = !!pCurType->pfnHandlerR3;
916#endif
917
918 /*
919 * Set ram flags, flush shadow PT entries and finally tell REM about this.
920 */
921 rc = pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs(pVM, pCur, pRam);
922
923 /** @todo NEM: not sure we need this notification... */
924#if defined(IN_RING3) || defined(IN_RING0)
925 NEMHCNotifyHandlerPhysicalModify(pVM, enmKind, GCPhysCurrent, GCPhys, cb, fRestoreAsRAM);
926#endif
927
928 pgmUnlock(pVM);
929
930#ifdef VBOX_WITH_REM
931# ifndef IN_RING3
932 REMNotifyHandlerPhysicalModify(pVM, enmKind, GCPhysCurrent, GCPhys, cb,
933 fHasHCHandler, fRestoreAsRAM);
934# else
935 REMR3NotifyHandlerPhysicalModify(pVM, enmKind, GCPhysCurrent, GCPhys, cb,
936 fHasHCHandler, fRestoreAsRAM);
937# endif
938#endif
939 PGM_INVL_ALL_VCPU_TLBS(pVM);
940 Log(("PGMHandlerPhysicalModify: GCPhysCurrent=%RGp -> GCPhys=%RGp GCPhysLast=%RGp\n",
941 GCPhysCurrent, GCPhys, GCPhysLast));
942 return VINF_SUCCESS;
943 }
944
945 AssertMsgFailed(("Conflict! GCPhys=%RGp GCPhysLast=%RGp\n", GCPhys, GCPhysLast));
946 rc = VERR_PGM_HANDLER_PHYSICAL_CONFLICT;
947 }
948 else
949 {
950 AssertMsgFailed(("No RAM range for %RGp-%RGp\n", GCPhys, GCPhysLast));
951 rc = VERR_PGM_HANDLER_PHYSICAL_NO_RAM_RANGE;
952 }
953 }
954 else
955 {
956 AssertMsgFailed(("Invalid range %RGp-%RGp\n", GCPhys, GCPhysLast));
957 rc = VERR_INVALID_PARAMETER;
958 }
959
960 /*
961 * Invalid new location, flush the cache and free it.
962 * We've only gotta notify REM and free the memory.
963 */
964 pgmHandlerPhysicalDeregisterNotifyREMAndNEM(pVM, pCur, -1);
965 pVM->pgm.s.pLastPhysHandlerR0 = 0;
966 pVM->pgm.s.pLastPhysHandlerR3 = 0;
967 pVM->pgm.s.pLastPhysHandlerRC = 0;
968 PGMHandlerPhysicalTypeRelease(pVM, pCur->hType);
969 MMHyperFree(pVM, pCur);
970 }
971 else
972 {
973 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhysCurrent));
974 rc = VERR_PGM_HANDLER_NOT_FOUND;
975 }
976
977 pgmUnlock(pVM);
978 return rc;
979}
980
981
982/**
983 * Changes the user callback arguments associated with a physical access
984 * handler.
985 *
986 * @returns VBox status code.
987 * @param pVM The cross context VM structure.
988 * @param GCPhys Start physical address of the handler.
989 * @param pvUserR3 User argument to the R3 handler.
990 * @param pvUserR0 User argument to the R0 handler.
991 * @param pvUserRC User argument to the RC handler. Values larger or
992 * equal to 0x10000 will be relocated automatically.
993 */
994VMMDECL(int) PGMHandlerPhysicalChangeUserArgs(PVM pVM, RTGCPHYS GCPhys, RTR3PTR pvUserR3, RTR0PTR pvUserR0, RTRCPTR pvUserRC)
995{
996 /*
997 * Find the handler.
998 */
999 int rc = VINF_SUCCESS;
1000 pgmLock(pVM);
1001 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1002 if (pCur)
1003 {
1004 /*
1005 * Change arguments.
1006 */
1007 pCur->pvUserR3 = pvUserR3;
1008 pCur->pvUserR0 = pvUserR0;
1009 pCur->pvUserRC = pvUserRC;
1010 }
1011 else
1012 {
1013 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhys));
1014 rc = VERR_PGM_HANDLER_NOT_FOUND;
1015 }
1016
1017 pgmUnlock(pVM);
1018 return rc;
1019}
1020
1021
1022/**
1023 * Splits a physical access handler in two.
1024 *
1025 * @returns VBox status code.
1026 * @param pVM The cross context VM structure.
1027 * @param GCPhys Start physical address of the handler.
1028 * @param GCPhysSplit The split address.
1029 */
1030VMMDECL(int) PGMHandlerPhysicalSplit(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS GCPhysSplit)
1031{
1032 AssertReturn(GCPhys < GCPhysSplit, VERR_INVALID_PARAMETER);
1033
1034 /*
1035 * Do the allocation without owning the lock.
1036 */
1037 PPGMPHYSHANDLER pNew;
1038 int rc = MMHyperAlloc(pVM, sizeof(*pNew), 0, MM_TAG_PGM_HANDLERS, (void **)&pNew);
1039 if (RT_FAILURE(rc))
1040 return rc;
1041
1042 /*
1043 * Get the handler.
1044 */
1045 pgmLock(pVM);
1046 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1047 if (RT_LIKELY(pCur))
1048 {
1049 if (RT_LIKELY(GCPhysSplit <= pCur->Core.KeyLast))
1050 {
1051 /*
1052 * Create new handler node for the 2nd half.
1053 */
1054 *pNew = *pCur;
1055 pNew->Core.Key = GCPhysSplit;
1056 pNew->cPages = (pNew->Core.KeyLast - (pNew->Core.Key & X86_PTE_PAE_PG_MASK) + PAGE_SIZE) >> PAGE_SHIFT;
1057
1058 pCur->Core.KeyLast = GCPhysSplit - 1;
1059 pCur->cPages = (pCur->Core.KeyLast - (pCur->Core.Key & X86_PTE_PAE_PG_MASK) + PAGE_SIZE) >> PAGE_SHIFT;
1060
1061 if (RT_LIKELY(RTAvlroGCPhysInsert(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, &pNew->Core)))
1062 {
1063 LogFlow(("PGMHandlerPhysicalSplit: %RGp-%RGp and %RGp-%RGp\n",
1064 pCur->Core.Key, pCur->Core.KeyLast, pNew->Core.Key, pNew->Core.KeyLast));
1065 pgmUnlock(pVM);
1066 return VINF_SUCCESS;
1067 }
1068 AssertMsgFailed(("whu?\n"));
1069 rc = VERR_PGM_PHYS_HANDLER_IPE;
1070 }
1071 else
1072 {
1073 AssertMsgFailed(("outside range: %RGp-%RGp split %RGp\n", pCur->Core.Key, pCur->Core.KeyLast, GCPhysSplit));
1074 rc = VERR_INVALID_PARAMETER;
1075 }
1076 }
1077 else
1078 {
1079 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhys));
1080 rc = VERR_PGM_HANDLER_NOT_FOUND;
1081 }
1082 pgmUnlock(pVM);
1083 MMHyperFree(pVM, pNew);
1084 return rc;
1085}
1086
1087
1088/**
1089 * Joins up two adjacent physical access handlers which has the same callbacks.
1090 *
1091 * @returns VBox status code.
1092 * @param pVM The cross context VM structure.
1093 * @param GCPhys1 Start physical address of the first handler.
1094 * @param GCPhys2 Start physical address of the second handler.
1095 */
1096VMMDECL(int) PGMHandlerPhysicalJoin(PVM pVM, RTGCPHYS GCPhys1, RTGCPHYS GCPhys2)
1097{
1098 /*
1099 * Get the handlers.
1100 */
1101 int rc;
1102 pgmLock(pVM);
1103 PPGMPHYSHANDLER pCur1 = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys1);
1104 if (RT_LIKELY(pCur1))
1105 {
1106 PPGMPHYSHANDLER pCur2 = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys2);
1107 if (RT_LIKELY(pCur2))
1108 {
1109 /*
1110 * Make sure that they are adjacent, and that they've got the same callbacks.
1111 */
1112 if (RT_LIKELY(pCur1->Core.KeyLast + 1 == pCur2->Core.Key))
1113 {
1114 if (RT_LIKELY(pCur1->hType == pCur2->hType))
1115 {
1116 PPGMPHYSHANDLER pCur3 = (PPGMPHYSHANDLER)RTAvlroGCPhysRemove(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys2);
1117 if (RT_LIKELY(pCur3 == pCur2))
1118 {
1119 pCur1->Core.KeyLast = pCur2->Core.KeyLast;
1120 pCur1->cPages = (pCur1->Core.KeyLast - (pCur1->Core.Key & X86_PTE_PAE_PG_MASK) + PAGE_SIZE) >> PAGE_SHIFT;
1121 LogFlow(("PGMHandlerPhysicalJoin: %RGp-%RGp %RGp-%RGp\n",
1122 pCur1->Core.Key, pCur1->Core.KeyLast, pCur2->Core.Key, pCur2->Core.KeyLast));
1123 pVM->pgm.s.pLastPhysHandlerR0 = 0;
1124 pVM->pgm.s.pLastPhysHandlerR3 = 0;
1125 pVM->pgm.s.pLastPhysHandlerRC = 0;
1126 PGMHandlerPhysicalTypeRelease(pVM, pCur2->hType);
1127 MMHyperFree(pVM, pCur2);
1128 pgmUnlock(pVM);
1129 return VINF_SUCCESS;
1130 }
1131
1132 Assert(pCur3 == pCur2);
1133 rc = VERR_PGM_PHYS_HANDLER_IPE;
1134 }
1135 else
1136 {
1137 AssertMsgFailed(("mismatching handlers\n"));
1138 rc = VERR_ACCESS_DENIED;
1139 }
1140 }
1141 else
1142 {
1143 AssertMsgFailed(("not adjacent: %RGp-%RGp %RGp-%RGp\n",
1144 pCur1->Core.Key, pCur1->Core.KeyLast, pCur2->Core.Key, pCur2->Core.KeyLast));
1145 rc = VERR_INVALID_PARAMETER;
1146 }
1147 }
1148 else
1149 {
1150 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhys2));
1151 rc = VERR_PGM_HANDLER_NOT_FOUND;
1152 }
1153 }
1154 else
1155 {
1156 AssertMsgFailed(("Didn't find range starting at %RGp\n", GCPhys1));
1157 rc = VERR_PGM_HANDLER_NOT_FOUND;
1158 }
1159 pgmUnlock(pVM);
1160 return rc;
1161
1162}
1163
1164
1165/**
1166 * Resets any modifications to individual pages in a physical page access
1167 * handler region.
1168 *
1169 * This is used in pair with PGMHandlerPhysicalPageTempOff(),
1170 * PGMHandlerPhysicalPageAlias() or PGMHandlerPhysicalPageAliasHC().
1171 *
1172 * @returns VBox status code.
1173 * @param pVM The cross context VM structure.
1174 * @param GCPhys The start address of the handler regions, i.e. what you
1175 * passed to PGMR3HandlerPhysicalRegister(),
1176 * PGMHandlerPhysicalRegisterEx() or
1177 * PGMHandlerPhysicalModify().
1178 */
1179VMMDECL(int) PGMHandlerPhysicalReset(PVM pVM, RTGCPHYS GCPhys)
1180{
1181 LogFlow(("PGMHandlerPhysicalReset GCPhys=%RGp\n", GCPhys));
1182 pgmLock(pVM);
1183
1184 /*
1185 * Find the handler.
1186 */
1187 int rc;
1188 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1189 if (RT_LIKELY(pCur))
1190 {
1191 /*
1192 * Validate kind.
1193 */
1194 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1195 switch (pCurType->enmKind)
1196 {
1197 case PGMPHYSHANDLERKIND_WRITE:
1198 case PGMPHYSHANDLERKIND_ALL:
1199 case PGMPHYSHANDLERKIND_MMIO: /* NOTE: Only use when clearing MMIO ranges with aliased MMIO2 pages! */
1200 {
1201 STAM_COUNTER_INC(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,PhysHandlerReset)); /** @todo move out of switch */
1202 PPGMRAMRANGE pRam = pgmPhysGetRange(pVM, GCPhys);
1203 Assert(pRam);
1204 Assert(pRam->GCPhys <= pCur->Core.Key);
1205 Assert(pRam->GCPhysLast >= pCur->Core.KeyLast);
1206
1207 if (pCurType->enmKind == PGMPHYSHANDLERKIND_MMIO)
1208 {
1209 /*
1210 * Reset all the PGMPAGETYPE_MMIO2_ALIAS_MMIO pages first and that's it.
1211 * This could probably be optimized a bit wrt to flushing, but I'm too lazy
1212 * to do that now...
1213 */
1214 if (pCur->cAliasedPages)
1215 {
1216 PPGMPAGE pPage = &pRam->aPages[(pCur->Core.Key - pRam->GCPhys) >> PAGE_SHIFT];
1217 uint32_t cLeft = pCur->cPages;
1218 while (cLeft-- > 0)
1219 {
1220 if ( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO
1221 || PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO)
1222 {
1223 Assert(pCur->cAliasedPages > 0);
1224 pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)cLeft << PAGE_SHIFT),
1225 false /*fDoAccounting*/);
1226 --pCur->cAliasedPages;
1227#ifndef VBOX_STRICT
1228 if (pCur->cAliasedPages == 0)
1229 break;
1230#endif
1231 }
1232 Assert(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO);
1233 pPage++;
1234 }
1235 Assert(pCur->cAliasedPages == 0);
1236 }
1237 }
1238 else if (pCur->cTmpOffPages > 0)
1239 {
1240 /*
1241 * Set the flags and flush shadow PT entries.
1242 */
1243 rc = pgmHandlerPhysicalSetRamFlagsAndFlushShadowPTs(pVM, pCur, pRam);
1244 }
1245
1246 pCur->cAliasedPages = 0;
1247 pCur->cTmpOffPages = 0;
1248
1249 rc = VINF_SUCCESS;
1250 break;
1251 }
1252
1253 /*
1254 * Invalid.
1255 */
1256 default:
1257 AssertMsgFailed(("Invalid type %d! Corruption!\n", pCurType->enmKind));
1258 rc = VERR_PGM_PHYS_HANDLER_IPE;
1259 break;
1260 }
1261 }
1262 else
1263 {
1264 AssertMsgFailed(("Didn't find MMIO Range starting at %#x\n", GCPhys));
1265 rc = VERR_PGM_HANDLER_NOT_FOUND;
1266 }
1267
1268 pgmUnlock(pVM);
1269 return rc;
1270}
1271
1272
1273/**
1274 * Temporarily turns off the access monitoring of a page within a monitored
1275 * physical write/all page access handler region.
1276 *
1277 * Use this when no further \#PFs are required for that page. Be aware that
1278 * a page directory sync might reset the flags, and turn on access monitoring
1279 * for the page.
1280 *
1281 * The caller must do required page table modifications.
1282 *
1283 * @returns VBox status code.
1284 * @param pVM The cross context VM structure.
1285 * @param GCPhys The start address of the access handler. This
1286 * must be a fully page aligned range or we risk
1287 * messing up other handlers installed for the
1288 * start and end pages.
1289 * @param GCPhysPage The physical address of the page to turn off
1290 * access monitoring for.
1291 */
1292VMMDECL(int) PGMHandlerPhysicalPageTempOff(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS GCPhysPage)
1293{
1294 LogFlow(("PGMHandlerPhysicalPageTempOff GCPhysPage=%RGp\n", GCPhysPage));
1295
1296 pgmLock(pVM);
1297 /*
1298 * Validate the range.
1299 */
1300 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1301 if (RT_LIKELY(pCur))
1302 {
1303 if (RT_LIKELY( GCPhysPage >= pCur->Core.Key
1304 && GCPhysPage <= pCur->Core.KeyLast))
1305 {
1306 Assert(!(pCur->Core.Key & PAGE_OFFSET_MASK));
1307 Assert((pCur->Core.KeyLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK);
1308
1309 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1310 AssertReturnStmt( pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE
1311 || pCurType->enmKind == PGMPHYSHANDLERKIND_ALL,
1312 pgmUnlock(pVM), VERR_ACCESS_DENIED);
1313
1314 /*
1315 * Change the page status.
1316 */
1317 PPGMPAGE pPage;
1318 int rc = pgmPhysGetPageEx(pVM, GCPhysPage, &pPage);
1319 AssertReturnStmt(RT_SUCCESS_NP(rc), pgmUnlock(pVM), rc);
1320 if (PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) != PGM_PAGE_HNDL_PHYS_STATE_DISABLED)
1321 {
1322 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_DISABLED);
1323 pCur->cTmpOffPages++;
1324#ifndef IN_RC
1325 /* Tell NEM about the protection change (VGA is using this to track dirty pages). */
1326 if (VM_IS_NEM_ENABLED(pVM))
1327 {
1328 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
1329 PGMPAGETYPE enmType = (PGMPAGETYPE)PGM_PAGE_GET_TYPE(pPage);
1330 NEMHCNotifyPhysPageProtChanged(pVM, GCPhysPage, PGM_PAGE_GET_HCPHYS(pPage),
1331 pgmPhysPageCalcNemProtection(pPage, enmType), enmType, &u2State);
1332 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
1333 }
1334#endif
1335 }
1336 pgmUnlock(pVM);
1337 return VINF_SUCCESS;
1338 }
1339 pgmUnlock(pVM);
1340 AssertMsgFailed(("The page %#x is outside the range %#x-%#x\n",
1341 GCPhysPage, pCur->Core.Key, pCur->Core.KeyLast));
1342 return VERR_INVALID_PARAMETER;
1343 }
1344 pgmUnlock(pVM);
1345 AssertMsgFailed(("Specified physical handler start address %#x is invalid.\n", GCPhys));
1346 return VERR_PGM_HANDLER_NOT_FOUND;
1347}
1348
1349#ifndef IEM_VERIFICATION_MODE_FULL
1350
1351/**
1352 * Replaces an MMIO page with an MMIO2 page.
1353 *
1354 * This is a worker for IOMMMIOMapMMIO2Page that works in a similar way to
1355 * PGMHandlerPhysicalPageTempOff but for an MMIO page. Since an MMIO page has no
1356 * backing, the caller must provide a replacement page. For various reasons the
1357 * replacement page must be an MMIO2 page.
1358 *
1359 * The caller must do required page table modifications. You can get away
1360 * without making any modifications since it's an MMIO page, the cost is an extra
1361 * \#PF which will the resync the page.
1362 *
1363 * Call PGMHandlerPhysicalReset() to restore the MMIO page.
1364 *
1365 * The caller may still get handler callback even after this call and must be
1366 * able to deal correctly with such calls. The reason for these callbacks are
1367 * either that we're executing in the recompiler (which doesn't know about this
1368 * arrangement) or that we've been restored from saved state (where we won't
1369 * save the change).
1370 *
1371 * @returns VBox status code.
1372 * @param pVM The cross context VM structure.
1373 * @param GCPhys The start address of the access handler. This
1374 * must be a fully page aligned range or we risk
1375 * messing up other handlers installed for the
1376 * start and end pages.
1377 * @param GCPhysPage The physical address of the page to turn off
1378 * access monitoring for.
1379 * @param GCPhysPageRemap The physical address of the MMIO2 page that
1380 * serves as backing memory.
1381 *
1382 * @remark May cause a page pool flush if used on a page that is already
1383 * aliased.
1384 *
1385 * @note This trick does only work reliably if the two pages are never ever
1386 * mapped in the same page table. If they are the page pool code will
1387 * be confused should either of them be flushed. See the special case
1388 * of zero page aliasing mentioned in #3170.
1389 *
1390 */
1391VMMDECL(int) PGMHandlerPhysicalPageAlias(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS GCPhysPage, RTGCPHYS GCPhysPageRemap)
1392{
1393/// Assert(!IOMIsLockOwner(pVM)); /* We mustn't own any other locks when calling this */
1394 pgmLock(pVM);
1395
1396 /*
1397 * Lookup and validate the range.
1398 */
1399 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1400 if (RT_LIKELY(pCur))
1401 {
1402 if (RT_LIKELY( GCPhysPage >= pCur->Core.Key
1403 && GCPhysPage <= pCur->Core.KeyLast))
1404 {
1405 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1406 AssertReturnStmt(pCurType->enmKind == PGMPHYSHANDLERKIND_MMIO, pgmUnlock(pVM), VERR_ACCESS_DENIED);
1407 AssertReturnStmt(!(pCur->Core.Key & PAGE_OFFSET_MASK), pgmUnlock(pVM), VERR_INVALID_PARAMETER);
1408 AssertReturnStmt((pCur->Core.KeyLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK, pgmUnlock(pVM), VERR_INVALID_PARAMETER);
1409
1410 /*
1411 * Get and validate the two pages.
1412 */
1413 PPGMPAGE pPageRemap;
1414 int rc = pgmPhysGetPageEx(pVM, GCPhysPageRemap, &pPageRemap);
1415 AssertReturnStmt(RT_SUCCESS_NP(rc), pgmUnlock(pVM), rc);
1416 AssertMsgReturnStmt(PGM_PAGE_GET_TYPE(pPageRemap) == PGMPAGETYPE_MMIO2,
1417 ("GCPhysPageRemap=%RGp %R[pgmpage]\n", GCPhysPageRemap, pPageRemap),
1418 pgmUnlock(pVM), VERR_PGM_PHYS_NOT_MMIO2);
1419
1420 PPGMPAGE pPage;
1421 rc = pgmPhysGetPageEx(pVM, GCPhysPage, &pPage);
1422 AssertReturnStmt(RT_SUCCESS_NP(rc), pgmUnlock(pVM), rc);
1423 if (PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO)
1424 {
1425 AssertMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO2_ALIAS_MMIO,
1426 ("GCPhysPage=%RGp %R[pgmpage]\n", GCPhysPage, pPage),
1427 VERR_PGM_PHYS_NOT_MMIO2);
1428 if (PGM_PAGE_GET_HCPHYS(pPage) == PGM_PAGE_GET_HCPHYS(pPageRemap))
1429 {
1430 pgmUnlock(pVM);
1431 return VINF_PGM_HANDLER_ALREADY_ALIASED;
1432 }
1433
1434 /*
1435 * The page is already mapped as some other page, reset it
1436 * to an MMIO/ZERO page before doing the new mapping.
1437 */
1438 Log(("PGMHandlerPhysicalPageAlias: GCPhysPage=%RGp (%R[pgmpage]; %RHp -> %RHp\n",
1439 GCPhysPage, pPage, PGM_PAGE_GET_HCPHYS(pPage), PGM_PAGE_GET_HCPHYS(pPageRemap)));
1440 pgmHandlerPhysicalResetAliasedPage(pVM, pPage, GCPhysPage, false /*fDoAccounting*/);
1441 pCur->cAliasedPages--;
1442 }
1443 Assert(PGM_PAGE_IS_ZERO(pPage));
1444
1445 /*
1446 * Do the actual remapping here.
1447 * This page now serves as an alias for the backing memory specified.
1448 */
1449 LogFlow(("PGMHandlerPhysicalPageAlias: %RGp (%R[pgmpage]) alias for %RGp (%R[pgmpage])\n",
1450 GCPhysPage, pPage, GCPhysPageRemap, pPageRemap ));
1451 PGM_PAGE_SET_HCPHYS(pVM, pPage, PGM_PAGE_GET_HCPHYS(pPageRemap));
1452 PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_MMIO2_ALIAS_MMIO);
1453 PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ALLOCATED);
1454 PGM_PAGE_SET_PAGEID(pVM, pPage, PGM_PAGE_GET_PAGEID(pPageRemap));
1455 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_DISABLED);
1456 pCur->cAliasedPages++;
1457 Assert(pCur->cAliasedPages <= pCur->cPages);
1458
1459 /* Flush its TLB entry. */
1460 pgmPhysInvalidatePageMapTLBEntry(pVM, GCPhysPage);
1461
1462# ifndef IN_RC
1463 /* Tell NEM about the backing and protection change. */
1464 if (VM_IS_NEM_ENABLED(pVM))
1465 {
1466 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
1467 NEMHCNotifyPhysPageChanged(pVM, GCPhysPage, pVM->pgm.s.HCPhysZeroPg, PGM_PAGE_GET_HCPHYS(pPage),
1468 pgmPhysPageCalcNemProtection(pPage, PGMPAGETYPE_MMIO2_ALIAS_MMIO),
1469 PGMPAGETYPE_MMIO2_ALIAS_MMIO, &u2State);
1470 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
1471 }
1472# endif
1473 LogFlow(("PGMHandlerPhysicalPageAlias: => %R[pgmpage]\n", pPage));
1474 pgmUnlock(pVM);
1475 return VINF_SUCCESS;
1476 }
1477
1478 pgmUnlock(pVM);
1479 AssertMsgFailed(("The page %#x is outside the range %#x-%#x\n",
1480 GCPhysPage, pCur->Core.Key, pCur->Core.KeyLast));
1481 return VERR_INVALID_PARAMETER;
1482 }
1483
1484 pgmUnlock(pVM);
1485 AssertMsgFailed(("Specified physical handler start address %#x is invalid.\n", GCPhys));
1486 return VERR_PGM_HANDLER_NOT_FOUND;
1487}
1488
1489
1490/**
1491 * Replaces an MMIO page with an arbitrary HC page in the shadow page tables.
1492 *
1493 * This differs from PGMHandlerPhysicalPageAlias in that the page doesn't need
1494 * to be a known MMIO2 page and that only shadow paging may access the page.
1495 * The latter distinction is important because the only use for this feature is
1496 * for mapping the special APIC access page that VT-x uses to detect APIC MMIO
1497 * operations, the page is shared between all guest CPUs and actually not
1498 * written to. At least at the moment.
1499 *
1500 * The caller must do required page table modifications. You can get away
1501 * without making any modifications since it's an MMIO page, the cost is an extra
1502 * \#PF which will the resync the page.
1503 *
1504 * Call PGMHandlerPhysicalReset() to restore the MMIO page.
1505 *
1506 *
1507 * @returns VBox status code.
1508 * @param pVM The cross context VM structure.
1509 * @param GCPhys The start address of the access handler. This
1510 * must be a fully page aligned range or we risk
1511 * messing up other handlers installed for the
1512 * start and end pages.
1513 * @param GCPhysPage The physical address of the page to turn off
1514 * access monitoring for.
1515 * @param HCPhysPageRemap The physical address of the HC page that
1516 * serves as backing memory.
1517 *
1518 * @remark May cause a page pool flush if used on a page that is already
1519 * aliased.
1520 */
1521VMMDECL(int) PGMHandlerPhysicalPageAliasHC(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS GCPhysPage, RTHCPHYS HCPhysPageRemap)
1522{
1523/// Assert(!IOMIsLockOwner(pVM)); /* We mustn't own any other locks when calling this */
1524 pgmLock(pVM);
1525
1526 /*
1527 * Lookup and validate the range.
1528 */
1529 PPGMPHYSHANDLER pCur = (PPGMPHYSHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysHandlers, GCPhys);
1530 if (RT_LIKELY(pCur))
1531 {
1532 if (RT_LIKELY( GCPhysPage >= pCur->Core.Key
1533 && GCPhysPage <= pCur->Core.KeyLast))
1534 {
1535 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1536 AssertReturnStmt(pCurType->enmKind == PGMPHYSHANDLERKIND_MMIO, pgmUnlock(pVM), VERR_ACCESS_DENIED);
1537 AssertReturnStmt(!(pCur->Core.Key & PAGE_OFFSET_MASK), pgmUnlock(pVM), VERR_INVALID_PARAMETER);
1538 AssertReturnStmt((pCur->Core.KeyLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK, pgmUnlock(pVM), VERR_INVALID_PARAMETER);
1539
1540 /*
1541 * Get and validate the pages.
1542 */
1543 PPGMPAGE pPage;
1544 int rc = pgmPhysGetPageEx(pVM, GCPhysPage, &pPage);
1545 AssertReturnStmt(RT_SUCCESS_NP(rc), pgmUnlock(pVM), rc);
1546 if (PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO)
1547 {
1548 pgmUnlock(pVM);
1549 AssertMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_SPECIAL_ALIAS_MMIO,
1550 ("GCPhysPage=%RGp %R[pgmpage]\n", GCPhysPage, pPage),
1551 VERR_PGM_PHYS_NOT_MMIO2);
1552 return VINF_PGM_HANDLER_ALREADY_ALIASED;
1553 }
1554 Assert(PGM_PAGE_IS_ZERO(pPage));
1555
1556 /*
1557 * Do the actual remapping here.
1558 * This page now serves as an alias for the backing memory
1559 * specified as far as shadow paging is concerned.
1560 */
1561 LogFlow(("PGMHandlerPhysicalPageAlias: %RGp (%R[pgmpage]) alias for %RHp\n",
1562 GCPhysPage, pPage, HCPhysPageRemap));
1563 PGM_PAGE_SET_HCPHYS(pVM, pPage, HCPhysPageRemap);
1564 PGM_PAGE_SET_TYPE(pVM, pPage, PGMPAGETYPE_SPECIAL_ALIAS_MMIO);
1565 PGM_PAGE_SET_STATE(pVM, pPage, PGM_PAGE_STATE_ALLOCATED);
1566 PGM_PAGE_SET_PAGEID(pVM, pPage, NIL_GMM_PAGEID);
1567 PGM_PAGE_SET_HNDL_PHYS_STATE(pPage, PGM_PAGE_HNDL_PHYS_STATE_DISABLED);
1568 pCur->cAliasedPages++;
1569 Assert(pCur->cAliasedPages <= pCur->cPages);
1570
1571 /* Flush its TLB entry. */
1572 pgmPhysInvalidatePageMapTLBEntry(pVM, GCPhysPage);
1573
1574# ifndef IN_RC
1575 /* Tell NEM about the backing and protection change. */
1576 if (VM_IS_NEM_ENABLED(pVM))
1577 {
1578 uint8_t u2State = PGM_PAGE_GET_NEM_STATE(pPage);
1579 NEMHCNotifyPhysPageChanged(pVM, GCPhysPage, pVM->pgm.s.HCPhysZeroPg, PGM_PAGE_GET_HCPHYS(pPage),
1580 pgmPhysPageCalcNemProtection(pPage, PGMPAGETYPE_SPECIAL_ALIAS_MMIO),
1581 PGMPAGETYPE_SPECIAL_ALIAS_MMIO, &u2State);
1582 PGM_PAGE_SET_NEM_STATE(pPage, u2State);
1583 }
1584# endif
1585 LogFlow(("PGMHandlerPhysicalPageAliasHC: => %R[pgmpage]\n", pPage));
1586 pgmUnlock(pVM);
1587 return VINF_SUCCESS;
1588 }
1589 pgmUnlock(pVM);
1590 AssertMsgFailed(("The page %#x is outside the range %#x-%#x\n",
1591 GCPhysPage, pCur->Core.Key, pCur->Core.KeyLast));
1592 return VERR_INVALID_PARAMETER;
1593 }
1594 pgmUnlock(pVM);
1595
1596 AssertMsgFailed(("Specified physical handler start address %#x is invalid.\n", GCPhys));
1597 return VERR_PGM_HANDLER_NOT_FOUND;
1598}
1599
1600#endif /* !IEM_VERIFICATION_MODE_FULL */
1601
1602/**
1603 * Checks if a physical range is handled
1604 *
1605 * @returns boolean
1606 * @param pVM The cross context VM structure.
1607 * @param GCPhys Start physical address earlier passed to PGMR3HandlerPhysicalRegister().
1608 * @remarks Caller must take the PGM lock...
1609 * @thread EMT.
1610 */
1611VMMDECL(bool) PGMHandlerPhysicalIsRegistered(PVM pVM, RTGCPHYS GCPhys)
1612{
1613 /*
1614 * Find the handler.
1615 */
1616 pgmLock(pVM);
1617 PPGMPHYSHANDLER pCur = pgmHandlerPhysicalLookup(pVM, GCPhys);
1618 if (pCur)
1619 {
1620#ifdef VBOX_STRICT
1621 Assert(GCPhys >= pCur->Core.Key && GCPhys <= pCur->Core.KeyLast);
1622 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1623 Assert( pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE
1624 || pCurType->enmKind == PGMPHYSHANDLERKIND_ALL
1625 || pCurType->enmKind == PGMPHYSHANDLERKIND_MMIO);
1626#endif
1627 pgmUnlock(pVM);
1628 return true;
1629 }
1630 pgmUnlock(pVM);
1631 return false;
1632}
1633
1634
1635/**
1636 * Checks if it's an disabled all access handler or write access handler at the
1637 * given address.
1638 *
1639 * @returns true if it's an all access handler, false if it's a write access
1640 * handler.
1641 * @param pVM The cross context VM structure.
1642 * @param GCPhys The address of the page with a disabled handler.
1643 *
1644 * @remarks The caller, PGMR3PhysTlbGCPhys2Ptr, must hold the PGM lock.
1645 */
1646bool pgmHandlerPhysicalIsAll(PVM pVM, RTGCPHYS GCPhys)
1647{
1648 pgmLock(pVM);
1649 PPGMPHYSHANDLER pCur = pgmHandlerPhysicalLookup(pVM, GCPhys);
1650 if (!pCur)
1651 {
1652 pgmUnlock(pVM);
1653 AssertFailed();
1654 return true;
1655 }
1656 PPGMPHYSHANDLERTYPEINT pCurType = PGMPHYSHANDLER_GET_TYPE(pVM, pCur);
1657 Assert( pCurType->enmKind == PGMPHYSHANDLERKIND_WRITE
1658 || pCurType->enmKind == PGMPHYSHANDLERKIND_ALL
1659 || pCurType->enmKind == PGMPHYSHANDLERKIND_MMIO); /* sanity */
1660 /* Only whole pages can be disabled. */
1661 Assert( pCur->Core.Key <= (GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK)
1662 && pCur->Core.KeyLast >= (GCPhys | PAGE_OFFSET_MASK));
1663
1664 bool bRet = pCurType->enmKind != PGMPHYSHANDLERKIND_WRITE;
1665 pgmUnlock(pVM);
1666 return bRet;
1667}
1668
1669
1670#ifdef VBOX_WITH_RAW_MODE
1671
1672/**
1673 * Internal worker for releasing a virtual handler type registration reference.
1674 *
1675 * @returns New reference count. UINT32_MAX if invalid input (asserted).
1676 * @param pVM The cross context VM structure.
1677 * @param pType Pointer to the type registration.
1678 */
1679DECLINLINE(uint32_t) pgmHandlerVirtualTypeRelease(PVM pVM, PPGMVIRTHANDLERTYPEINT pType)
1680{
1681 AssertMsgReturn(pType->u32Magic == PGMVIRTHANDLERTYPEINT_MAGIC, ("%#x\n", pType->u32Magic), UINT32_MAX);
1682 uint32_t cRefs = ASMAtomicDecU32(&pType->cRefs);
1683 if (cRefs == 0)
1684 {
1685 pgmLock(pVM);
1686 pType->u32Magic = PGMVIRTHANDLERTYPEINT_MAGIC_DEAD;
1687 RTListOff32NodeRemove(&pType->ListNode);
1688 pgmUnlock(pVM);
1689 MMHyperFree(pVM, pType);
1690 }
1691 return cRefs;
1692}
1693
1694
1695/**
1696 * Internal worker for retaining a virtual handler type registration reference.
1697 *
1698 * @returns New reference count. UINT32_MAX if invalid input (asserted).
1699 * @param pVM The cross context VM structure.
1700 * @param pType Pointer to the type registration.
1701 */
1702DECLINLINE(uint32_t) pgmHandlerVirtualTypeRetain(PVM pVM, PPGMVIRTHANDLERTYPEINT pType)
1703{
1704 NOREF(pVM);
1705 AssertMsgReturn(pType->u32Magic == PGMVIRTHANDLERTYPEINT_MAGIC, ("%#x\n", pType->u32Magic), UINT32_MAX);
1706 uint32_t cRefs = ASMAtomicIncU32(&pType->cRefs);
1707 Assert(cRefs < _1M && cRefs > 0);
1708 return cRefs;
1709}
1710
1711
1712/**
1713 * Releases a reference to a virtual handler type registration.
1714 *
1715 * @returns New reference count. UINT32_MAX if invalid input (asserted).
1716 * @param pVM The cross context VM structure.
1717 * @param hType The type regiration handle.
1718 */
1719VMM_INT_DECL(uint32_t) PGMHandlerVirtualTypeRelease(PVM pVM, PGMVIRTHANDLERTYPE hType)
1720{
1721 if (hType != NIL_PGMVIRTHANDLERTYPE)
1722 return pgmHandlerVirtualTypeRelease(pVM, PGMVIRTHANDLERTYPEINT_FROM_HANDLE(pVM, hType));
1723 return 0;
1724}
1725
1726
1727/**
1728 * Retains a reference to a virtual handler type registration.
1729 *
1730 * @returns New reference count. UINT32_MAX if invalid input (asserted).
1731 * @param pVM The cross context VM structure.
1732 * @param hType The type regiration handle.
1733 */
1734VMM_INT_DECL(uint32_t) PGMHandlerVirtualTypeRetain(PVM pVM, PGMVIRTHANDLERTYPE hType)
1735{
1736 return pgmHandlerVirtualTypeRetain(pVM, PGMVIRTHANDLERTYPEINT_FROM_HANDLE(pVM, hType));
1737}
1738
1739
1740/**
1741 * Check if particular guest's VA is being monitored.
1742 *
1743 * @returns true or false
1744 * @param pVM The cross context VM structure.
1745 * @param GCPtr Virtual address.
1746 * @remarks Will acquire the PGM lock.
1747 * @thread Any.
1748 */
1749VMM_INT_DECL(bool) PGMHandlerVirtualIsRegistered(PVM pVM, RTGCPTR GCPtr)
1750{
1751 pgmLock(pVM);
1752 PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)RTAvlroGCPtrGet(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, GCPtr);
1753 pgmUnlock(pVM);
1754
1755 return pCur != NULL;
1756}
1757
1758
1759/**
1760 * Search for virtual handler with matching physical address
1761 *
1762 * @returns Pointer to the virtual handler structure if found, otherwise NULL.
1763 * @param pVM The cross context VM structure.
1764 * @param GCPhys GC physical address to search for.
1765 * @param piPage Where to store the pointer to the index of the cached physical page.
1766 */
1767PPGMVIRTHANDLER pgmHandlerVirtualFindByPhysAddr(PVM pVM, RTGCPHYS GCPhys, unsigned *piPage)
1768{
1769 STAM_PROFILE_START(&pVM->pgm.s.CTX_MID_Z(Stat,VirtHandlerSearchByPhys), a);
1770
1771 pgmLock(pVM);
1772 PPGMPHYS2VIRTHANDLER pCur;
1773 pCur = (PPGMPHYS2VIRTHANDLER)RTAvlroGCPhysRangeGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers, GCPhys);
1774 if (pCur)
1775 {
1776 /* found a match! */
1777 PPGMVIRTHANDLER pVirt = (PPGMVIRTHANDLER)((uintptr_t)pCur + pCur->offVirtHandler);
1778 *piPage = pCur - &pVirt->aPhysToVirt[0];
1779 pgmUnlock(pVM);
1780
1781#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
1782 AssertRelease(pCur->offNextAlias & PGMPHYS2VIRTHANDLER_IS_HEAD);
1783#endif
1784 LogFlow(("PHYS2VIRT: found match for %RGp -> %RGv *piPage=%#x\n", GCPhys, pVirt->Core.Key, *piPage));
1785 STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,VirtHandlerSearchByPhys), a);
1786 return pVirt;
1787 }
1788
1789 pgmUnlock(pVM);
1790 STAM_PROFILE_STOP(&pVM->pgm.s.CTX_SUFF(pStats)->CTX_MID_Z(Stat,VirtHandlerSearchByPhys), a);
1791 return NULL;
1792}
1793
1794
1795/**
1796 * Deal with aliases in phys2virt.
1797 *
1798 * As pointed out by the various todos, this currently only deals with
1799 * aliases where the two ranges match 100%.
1800 *
1801 * @param pVM The cross context VM structure.
1802 * @param pPhys2Virt The node we failed insert.
1803 */
1804static void pgmHandlerVirtualInsertAliased(PVM pVM, PPGMPHYS2VIRTHANDLER pPhys2Virt)
1805{
1806 /*
1807 * First find the node which is conflicting with us.
1808 */
1809 /** @todo Deal with partial overlapping. (Unlikely situation, so I'm too lazy to do anything about it now.) */
1810 /** @todo check if the current head node covers the ground we do. This is highly unlikely
1811 * and I'm too lazy to implement this now as it will require sorting the list and stuff like that. */
1812 PPGMPHYS2VIRTHANDLER pHead = (PPGMPHYS2VIRTHANDLER)RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers, pPhys2Virt->Core.Key);
1813#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
1814 AssertReleaseMsg(pHead != pPhys2Virt, ("%RGp-%RGp offVirtHandler=%#RX32\n",
1815 pPhys2Virt->Core.Key, pPhys2Virt->Core.KeyLast, pPhys2Virt->offVirtHandler));
1816#endif
1817 if (RT_UNLIKELY(!pHead || pHead->Core.KeyLast != pPhys2Virt->Core.KeyLast))
1818 {
1819 /** @todo do something clever here... */
1820 LogRel(("pgmHandlerVirtualInsertAliased: %RGp-%RGp\n", pPhys2Virt->Core.Key, pPhys2Virt->Core.KeyLast));
1821 pPhys2Virt->offNextAlias = 0;
1822 return;
1823 }
1824
1825 /*
1826 * Insert ourselves as the next node.
1827 */
1828 if (!(pHead->offNextAlias & PGMPHYS2VIRTHANDLER_OFF_MASK))
1829 pPhys2Virt->offNextAlias = PGMPHYS2VIRTHANDLER_IN_TREE;
1830 else
1831 {
1832 PPGMPHYS2VIRTHANDLER pNext = (PPGMPHYS2VIRTHANDLER)((intptr_t)pHead + (pHead->offNextAlias & PGMPHYS2VIRTHANDLER_OFF_MASK));
1833 pPhys2Virt->offNextAlias = ((intptr_t)pNext - (intptr_t)pPhys2Virt)
1834 | PGMPHYS2VIRTHANDLER_IN_TREE;
1835 }
1836 pHead->offNextAlias = ((intptr_t)pPhys2Virt - (intptr_t)pHead)
1837 | (pHead->offNextAlias & ~PGMPHYS2VIRTHANDLER_OFF_MASK);
1838 Log(("pgmHandlerVirtualInsertAliased: %RGp-%RGp offNextAlias=%#RX32\n", pPhys2Virt->Core.Key, pPhys2Virt->Core.KeyLast, pPhys2Virt->offNextAlias));
1839}
1840
1841
1842/**
1843 * Resets one virtual handler range.
1844 *
1845 * This is called by HandlerVirtualUpdate when it has detected some kind of
1846 * problem and have started clearing the virtual handler page states (or
1847 * when there have been registration/deregistrations). For this reason this
1848 * function will only update the page status if it's lower than desired.
1849 *
1850 * @returns 0
1851 * @param pNode Pointer to a PGMVIRTHANDLER.
1852 * @param pvUser Pointer to the VM.
1853 */
1854DECLCALLBACK(int) pgmHandlerVirtualResetOne(PAVLROGCPTRNODECORE pNode, void *pvUser)
1855{
1856 PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)pNode;
1857 PVM pVM = (PVM)pvUser;
1858
1859 PGM_LOCK_ASSERT_OWNER(pVM);
1860
1861 /*
1862 * Iterate the pages and apply the new state.
1863 */
1864 uint32_t uState = PGMVIRTANDLER_GET_TYPE(pVM, pCur)->uState;
1865 PPGMRAMRANGE pRamHint = NULL;
1866 RTGCUINTPTR offPage = ((RTGCUINTPTR)pCur->Core.Key & PAGE_OFFSET_MASK);
1867 RTGCUINTPTR cbLeft = pCur->cb;
1868 for (unsigned iPage = 0; iPage < pCur->cPages; iPage++)
1869 {
1870 PPGMPHYS2VIRTHANDLER pPhys2Virt = &pCur->aPhysToVirt[iPage];
1871 if (pPhys2Virt->Core.Key != NIL_RTGCPHYS)
1872 {
1873 /*
1874 * Update the page state wrt virtual handlers.
1875 */
1876 PPGMPAGE pPage;
1877 int rc = pgmPhysGetPageWithHintEx(pVM, pPhys2Virt->Core.Key, &pPage, &pRamHint);
1878 if ( RT_SUCCESS(rc)
1879 && PGM_PAGE_GET_HNDL_VIRT_STATE(pPage) < uState)
1880 PGM_PAGE_SET_HNDL_VIRT_STATE(pPage, uState);
1881 else
1882 AssertRC(rc);
1883
1884 /*
1885 * Need to insert the page in the Phys2Virt lookup tree?
1886 */
1887 if (pPhys2Virt->Core.KeyLast == NIL_RTGCPHYS)
1888 {
1889#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
1890 AssertRelease(!pPhys2Virt->offNextAlias);
1891#endif
1892 unsigned cbPhys = cbLeft;
1893 if (cbPhys > PAGE_SIZE - offPage)
1894 cbPhys = PAGE_SIZE - offPage;
1895 else
1896 Assert(iPage == pCur->cPages - 1);
1897 pPhys2Virt->Core.KeyLast = pPhys2Virt->Core.Key + cbPhys - 1; /* inclusive */
1898 pPhys2Virt->offNextAlias = PGMPHYS2VIRTHANDLER_IS_HEAD | PGMPHYS2VIRTHANDLER_IN_TREE;
1899 if (!RTAvlroGCPhysInsert(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers, &pPhys2Virt->Core))
1900 pgmHandlerVirtualInsertAliased(pVM, pPhys2Virt);
1901#ifdef VBOX_STRICT_PGM_HANDLER_VIRTUAL
1902 else
1903 AssertReleaseMsg(RTAvlroGCPhysGet(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers, pPhys2Virt->Core.Key) == &pPhys2Virt->Core,
1904 ("%RGp-%RGp offNextAlias=%#RX32\n",
1905 pPhys2Virt->Core.Key, pPhys2Virt->Core.KeyLast, pPhys2Virt->offNextAlias));
1906#endif
1907 Log2(("PHYS2VIRT: Insert physical range %RGp-%RGp offNextAlias=%#RX32 %s\n",
1908 pPhys2Virt->Core.Key, pPhys2Virt->Core.KeyLast, pPhys2Virt->offNextAlias, R3STRING(pCur->pszDesc)));
1909 }
1910 }
1911 cbLeft -= PAGE_SIZE - offPage;
1912 offPage = 0;
1913 }
1914
1915 return 0;
1916}
1917
1918# if defined(VBOX_STRICT) || defined(LOG_ENABLED)
1919
1920/**
1921 * Worker for pgmHandlerVirtualDumpPhysPages.
1922 *
1923 * @returns 0 (continue enumeration).
1924 * @param pNode The virtual handler node.
1925 * @param pvUser User argument, unused.
1926 */
1927static DECLCALLBACK(int) pgmHandlerVirtualDumpPhysPagesCallback(PAVLROGCPHYSNODECORE pNode, void *pvUser)
1928{
1929 PPGMPHYS2VIRTHANDLER pCur = (PPGMPHYS2VIRTHANDLER)pNode;
1930 PPGMVIRTHANDLER pVirt = (PPGMVIRTHANDLER)((uintptr_t)pCur + pCur->offVirtHandler);
1931 NOREF(pvUser); NOREF(pVirt);
1932
1933 Log(("PHYS2VIRT: Range %RGp-%RGp for virtual handler: %s\n", pCur->Core.Key, pCur->Core.KeyLast, pVirt->pszDesc));
1934 return 0;
1935}
1936
1937
1938/**
1939 * Assertion / logging helper for dumping all the
1940 * virtual handlers to the log.
1941 *
1942 * @param pVM The cross context VM structure.
1943 */
1944void pgmHandlerVirtualDumpPhysPages(PVM pVM)
1945{
1946 RTAvlroGCPhysDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers, true /* from left */,
1947 pgmHandlerVirtualDumpPhysPagesCallback, 0);
1948}
1949
1950# endif /* VBOX_STRICT || LOG_ENABLED */
1951#endif /* VBOX_WITH_RAW_MODE */
1952#ifdef VBOX_STRICT
1953
1954/**
1955 * State structure used by the PGMAssertHandlerAndFlagsInSync() function
1956 * and its AVL enumerators.
1957 */
1958typedef struct PGMAHAFIS
1959{
1960 /** The current physical address. */
1961 RTGCPHYS GCPhys;
1962 /** The state we've calculated. */
1963 unsigned uVirtStateFound;
1964 /** The state we're matching up to. */
1965 unsigned uVirtState;
1966 /** Number of errors. */
1967 unsigned cErrors;
1968 /** Pointer to the VM. */
1969 PVM pVM;
1970} PGMAHAFIS, *PPGMAHAFIS;
1971
1972# ifdef VBOX_WITH_RAW_MODE
1973
1974# if 0 /* unused */
1975/**
1976 * Verify virtual handler by matching physical address.
1977 *
1978 * @returns 0
1979 * @param pNode Pointer to a PGMVIRTHANDLER.
1980 * @param pvUser Pointer to user parameter.
1981 */
1982static DECLCALLBACK(int) pgmHandlerVirtualVerifyOneByPhysAddr(PAVLROGCPTRNODECORE pNode, void *pvUser)
1983{
1984 PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)pNode;
1985 PPGMAHAFIS pState = (PPGMAHAFIS)pvUser;
1986
1987 for (unsigned iPage = 0; iPage < pCur->cPages; iPage++)
1988 {
1989 if ((pCur->aPhysToVirt[iPage].Core.Key & X86_PTE_PAE_PG_MASK) == pState->GCPhys)
1990 {
1991 unsigned uState = pgmHandlerVirtualCalcState(pCur);
1992 if (pState->uVirtState < uState)
1993 {
1994 error
1995 }
1996
1997 if (pState->uVirtState == uState)
1998 break; //??
1999 }
2000 }
2001 return 0;
2002}
2003# endif /* unused */
2004
2005
2006/**
2007 * Verify a virtual handler (enumeration callback).
2008 *
2009 * Called by PGMAssertHandlerAndFlagsInSync to check the sanity of all
2010 * the virtual handlers, esp. that the physical addresses matches up.
2011 *
2012 * @returns 0
2013 * @param pNode Pointer to a PGMVIRTHANDLER.
2014 * @param pvUser Pointer to a PPGMAHAFIS structure.
2015 */
2016static DECLCALLBACK(int) pgmHandlerVirtualVerifyOne(PAVLROGCPTRNODECORE pNode, void *pvUser)
2017{
2018 PPGMAHAFIS pState = (PPGMAHAFIS)pvUser;
2019 PVM pVM = pState->pVM;
2020 PPGMVIRTHANDLER pVirt = (PPGMVIRTHANDLER)pNode;
2021 PPGMVIRTHANDLERTYPEINT pType = PGMVIRTANDLER_GET_TYPE(pVM, pVirt);
2022
2023 /*
2024 * Validate the type and calc state.
2025 */
2026 switch (pType->enmKind)
2027 {
2028 case PGMVIRTHANDLERKIND_WRITE:
2029 case PGMVIRTHANDLERKIND_ALL:
2030 break;
2031 default:
2032 AssertMsgFailed(("unknown/wrong enmKind=%d\n", pType->enmKind));
2033 pState->cErrors++;
2034 return 0;
2035 }
2036 const uint32_t uState = pType->uState;
2037
2038 /*
2039 * Check key alignment.
2040 */
2041 if ( (pVirt->aPhysToVirt[0].Core.Key & PAGE_OFFSET_MASK) != ((RTGCUINTPTR)pVirt->Core.Key & PAGE_OFFSET_MASK)
2042 && pVirt->aPhysToVirt[0].Core.Key != NIL_RTGCPHYS)
2043 {
2044 AssertMsgFailed(("virt handler phys has incorrect key! %RGp %RGv %s\n",
2045 pVirt->aPhysToVirt[0].Core.Key, pVirt->Core.Key, R3STRING(pVirt->pszDesc)));
2046 pState->cErrors++;
2047 }
2048
2049 if ( (pVirt->aPhysToVirt[pVirt->cPages - 1].Core.KeyLast & PAGE_OFFSET_MASK) != ((RTGCUINTPTR)pVirt->Core.KeyLast & PAGE_OFFSET_MASK)
2050 && pVirt->aPhysToVirt[pVirt->cPages - 1].Core.Key != NIL_RTGCPHYS)
2051 {
2052 AssertMsgFailed(("virt handler phys has incorrect key! %RGp %RGv %s\n",
2053 pVirt->aPhysToVirt[pVirt->cPages - 1].Core.KeyLast, pVirt->Core.KeyLast, R3STRING(pVirt->pszDesc)));
2054 pState->cErrors++;
2055 }
2056
2057 /*
2058 * Check pages for sanity and state.
2059 */
2060 RTGCUINTPTR GCPtr = (RTGCUINTPTR)pVirt->Core.Key;
2061 for (unsigned iPage = 0; iPage < pVirt->cPages; iPage++, GCPtr += PAGE_SIZE)
2062 {
2063 for (VMCPUID i = 0; i < pVM->cCpus; i++)
2064 {
2065 PVMCPU pVCpu = &pVM->aCpus[i];
2066
2067 RTGCPHYS GCPhysGst;
2068 uint64_t fGst;
2069 int rc = PGMGstGetPage(pVCpu, (RTGCPTR)GCPtr, &fGst, &GCPhysGst);
2070 if ( rc == VERR_PAGE_NOT_PRESENT
2071 || rc == VERR_PAGE_TABLE_NOT_PRESENT)
2072 {
2073 if (pVirt->aPhysToVirt[iPage].Core.Key != NIL_RTGCPHYS)
2074 {
2075 AssertMsgFailed(("virt handler phys out of sync. %RGp GCPhysNew=~0 iPage=%#x %RGv %s\n",
2076 pVirt->aPhysToVirt[iPage].Core.Key, iPage, GCPtr, R3STRING(pVirt->pszDesc)));
2077 pState->cErrors++;
2078 }
2079 continue;
2080 }
2081
2082 AssertRCReturn(rc, 0);
2083 if ((pVirt->aPhysToVirt[iPage].Core.Key & X86_PTE_PAE_PG_MASK) != GCPhysGst)
2084 {
2085 AssertMsgFailed(("virt handler phys out of sync. %RGp GCPhysGst=%RGp iPage=%#x %RGv %s\n",
2086 pVirt->aPhysToVirt[iPage].Core.Key, GCPhysGst, iPage, GCPtr, R3STRING(pVirt->pszDesc)));
2087 pState->cErrors++;
2088 continue;
2089 }
2090
2091 PPGMPAGE pPage = pgmPhysGetPage(pVM, GCPhysGst);
2092 if (!pPage)
2093 {
2094 AssertMsgFailed(("virt handler getting ram flags. GCPhysGst=%RGp iPage=%#x %RGv %s\n",
2095 GCPhysGst, iPage, GCPtr, R3STRING(pVirt->pszDesc)));
2096 pState->cErrors++;
2097 continue;
2098 }
2099
2100 if (PGM_PAGE_GET_HNDL_VIRT_STATE(pPage) < uState)
2101 {
2102 AssertMsgFailed(("virt handler state mismatch. pPage=%R[pgmpage] GCPhysGst=%RGp iPage=%#x %RGv state=%d expected>=%d %s\n",
2103 pPage, GCPhysGst, iPage, GCPtr, PGM_PAGE_GET_HNDL_VIRT_STATE(pPage), uState, R3STRING(pVirt->pszDesc)));
2104 pState->cErrors++;
2105 continue;
2106 }
2107 } /* for each VCPU */
2108 } /* for pages in virtual mapping. */
2109
2110 return 0;
2111}
2112
2113# endif /* VBOX_WITH_RAW_MODE */
2114
2115/**
2116 * Asserts that the handlers+guest-page-tables == ramrange-flags and
2117 * that the physical addresses associated with virtual handlers are correct.
2118 *
2119 * @returns Number of mismatches.
2120 * @param pVM The cross context VM structure.
2121 */
2122VMMDECL(unsigned) PGMAssertHandlerAndFlagsInSync(PVM pVM)
2123{
2124 PPGM pPGM = &pVM->pgm.s;
2125 PGMAHAFIS State;
2126 State.GCPhys = 0;
2127 State.uVirtState = 0;
2128 State.uVirtStateFound = 0;
2129 State.cErrors = 0;
2130 State.pVM = pVM;
2131
2132 PGM_LOCK_ASSERT_OWNER(pVM);
2133
2134 /*
2135 * Check the RAM flags against the handlers.
2136 */
2137 for (PPGMRAMRANGE pRam = pPGM->CTX_SUFF(pRamRangesX); pRam; pRam = pRam->CTX_SUFF(pNext))
2138 {
2139 const uint32_t cPages = pRam->cb >> PAGE_SHIFT;
2140 for (uint32_t iPage = 0; iPage < cPages; iPage++)
2141 {
2142 PGMPAGE const *pPage = &pRam->aPages[iPage];
2143 if (PGM_PAGE_HAS_ANY_HANDLERS(pPage))
2144 {
2145 State.GCPhys = pRam->GCPhys + (iPage << PAGE_SHIFT);
2146
2147 /*
2148 * Physical first - calculate the state based on the handlers
2149 * active on the page, then compare.
2150 */
2151 if (PGM_PAGE_HAS_ANY_PHYSICAL_HANDLERS(pPage))
2152 {
2153 /* the first */
2154 PPGMPHYSHANDLER pPhys = (PPGMPHYSHANDLER)RTAvlroGCPhysRangeGet(&pPGM->CTX_SUFF(pTrees)->PhysHandlers, State.GCPhys);
2155 if (!pPhys)
2156 {
2157 pPhys = (PPGMPHYSHANDLER)RTAvlroGCPhysGetBestFit(&pPGM->CTX_SUFF(pTrees)->PhysHandlers, State.GCPhys, true);
2158 if ( pPhys
2159 && pPhys->Core.Key > (State.GCPhys + PAGE_SIZE - 1))
2160 pPhys = NULL;
2161 Assert(!pPhys || pPhys->Core.Key >= State.GCPhys);
2162 }
2163 if (pPhys)
2164 {
2165 PPGMPHYSHANDLERTYPEINT pPhysType = (PPGMPHYSHANDLERTYPEINT)MMHyperHeapOffsetToPtr(pVM, pPhys->hType);
2166 unsigned uState = pPhysType->uState;
2167
2168 /* more? */
2169 while (pPhys->Core.KeyLast < (State.GCPhys | PAGE_OFFSET_MASK))
2170 {
2171 PPGMPHYSHANDLER pPhys2 = (PPGMPHYSHANDLER)RTAvlroGCPhysGetBestFit(&pPGM->CTX_SUFF(pTrees)->PhysHandlers,
2172 pPhys->Core.KeyLast + 1, true);
2173 if ( !pPhys2
2174 || pPhys2->Core.Key > (State.GCPhys | PAGE_OFFSET_MASK))
2175 break;
2176 PPGMPHYSHANDLERTYPEINT pPhysType2 = (PPGMPHYSHANDLERTYPEINT)MMHyperHeapOffsetToPtr(pVM, pPhys2->hType);
2177 uState = RT_MAX(uState, pPhysType2->uState);
2178 pPhys = pPhys2;
2179 }
2180
2181 /* compare.*/
2182 if ( PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) != uState
2183 && PGM_PAGE_GET_HNDL_PHYS_STATE(pPage) != PGM_PAGE_HNDL_PHYS_STATE_DISABLED)
2184 {
2185 AssertMsgFailed(("ram range vs phys handler flags mismatch. GCPhys=%RGp state=%d expected=%d %s\n",
2186 State.GCPhys, PGM_PAGE_GET_HNDL_PHYS_STATE(pPage), uState, pPhysType->pszDesc));
2187 State.cErrors++;
2188 }
2189
2190# ifdef VBOX_WITH_REM
2191# ifdef IN_RING3
2192 /* validate that REM is handling it. */
2193 if ( !REMR3IsPageAccessHandled(pVM, State.GCPhys)
2194 /* ignore shadowed ROM for the time being. */
2195 && PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_ROM_SHADOW)
2196 {
2197 AssertMsgFailed(("ram range vs phys handler REM mismatch. GCPhys=%RGp state=%d %s\n",
2198 State.GCPhys, PGM_PAGE_GET_HNDL_PHYS_STATE(pPage), pPhysType->pszDesc));
2199 State.cErrors++;
2200 }
2201# endif
2202# endif
2203 }
2204 else
2205 {
2206 AssertMsgFailed(("ram range vs phys handler mismatch. no handler for GCPhys=%RGp\n", State.GCPhys));
2207 State.cErrors++;
2208 }
2209 }
2210
2211 /*
2212 * Virtual handlers.
2213 */
2214 if (PGM_PAGE_HAS_ACTIVE_VIRTUAL_HANDLERS(pPage))
2215 {
2216 State.uVirtState = PGM_PAGE_GET_HNDL_VIRT_STATE(pPage);
2217
2218 /* locate all the matching physical ranges. */
2219 State.uVirtStateFound = PGM_PAGE_HNDL_VIRT_STATE_NONE;
2220# ifdef VBOX_WITH_RAW_MODE
2221 RTGCPHYS GCPhysKey = State.GCPhys;
2222 for (;;)
2223 {
2224 PPGMPHYS2VIRTHANDLER pPhys2Virt = (PPGMPHYS2VIRTHANDLER)RTAvlroGCPhysGetBestFit(&pVM->pgm.s.CTX_SUFF(pTrees)->PhysToVirtHandlers,
2225 GCPhysKey, true /* above-or-equal */);
2226 if ( !pPhys2Virt
2227 || (pPhys2Virt->Core.Key & X86_PTE_PAE_PG_MASK) != State.GCPhys)
2228 break;
2229
2230 /* the head */
2231 GCPhysKey = pPhys2Virt->Core.KeyLast;
2232 PPGMVIRTHANDLER pCur = (PPGMVIRTHANDLER)((uintptr_t)pPhys2Virt + pPhys2Virt->offVirtHandler);
2233 unsigned uState = PGMVIRTANDLER_GET_TYPE(pVM, pCur)->uState;
2234 State.uVirtStateFound = RT_MAX(State.uVirtStateFound, uState);
2235
2236 /* any aliases */
2237 while (pPhys2Virt->offNextAlias & PGMPHYS2VIRTHANDLER_OFF_MASK)
2238 {
2239 pPhys2Virt = (PPGMPHYS2VIRTHANDLER)((uintptr_t)pPhys2Virt + (pPhys2Virt->offNextAlias & PGMPHYS2VIRTHANDLER_OFF_MASK));
2240 pCur = (PPGMVIRTHANDLER)((uintptr_t)pPhys2Virt + pPhys2Virt->offVirtHandler);
2241 uState = PGMVIRTANDLER_GET_TYPE(pVM, pCur)->uState;
2242 State.uVirtStateFound = RT_MAX(State.uVirtStateFound, uState);
2243 }
2244
2245 /* done? */
2246 if ((GCPhysKey & X86_PTE_PAE_PG_MASK) != State.GCPhys)
2247 break;
2248 }
2249# endif /* VBOX_WITH_RAW_MODE */
2250 if (State.uVirtState != State.uVirtStateFound)
2251 {
2252 AssertMsgFailed(("ram range vs virt handler flags mismatch. GCPhys=%RGp uVirtState=%#x uVirtStateFound=%#x\n",
2253 State.GCPhys, State.uVirtState, State.uVirtStateFound));
2254 State.cErrors++;
2255 }
2256 }
2257 }
2258 } /* foreach page in ram range. */
2259 } /* foreach ram range. */
2260
2261# ifdef VBOX_WITH_RAW_MODE
2262 /*
2263 * Check that the physical addresses of the virtual handlers matches up
2264 * and that they are otherwise sane.
2265 */
2266 RTAvlroGCPtrDoWithAll(&pVM->pgm.s.CTX_SUFF(pTrees)->VirtHandlers, true, pgmHandlerVirtualVerifyOne, &State);
2267# endif
2268
2269 /*
2270 * Do the reverse check for physical handlers.
2271 */
2272 /** @todo */
2273
2274 return State.cErrors;
2275}
2276
2277#endif /* VBOX_STRICT */
2278
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