VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMR3/PDM.cpp@ 35572

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1/* $Id: PDM.cpp 35346 2010-12-27 16:13:13Z vboxsync $ */
2/** @file
3 * PDM - Pluggable Device Manager.
4 */
5
6/*
7 * Copyright (C) 2006-2007 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/** @page pg_pdm PDM - The Pluggable Device & Driver Manager
20 *
21 * VirtualBox is designed to be very configurable, i.e. the ability to select
22 * virtual devices and configure them uniquely for a VM. For this reason
23 * virtual devices are not statically linked with the VMM but loaded, linked and
24 * instantiated at runtime by PDM using the information found in the
25 * Configuration Manager (CFGM).
26 *
27 * While the chief purpose of PDM is to manager of devices their drivers, it
28 * also serves as somewhere to put usful things like cross context queues, cross
29 * context synchronization (like critsect), VM centric thread management,
30 * asynchronous I/O framework, and so on.
31 *
32 * @see grp_pdm
33 *
34 *
35 * @section sec_pdm_dev The Pluggable Devices
36 *
37 * Devices register themselves when the module containing them is loaded. PDM
38 * will call the entry point 'VBoxDevicesRegister' when loading a device module.
39 * The device module will then use the supplied callback table to check the VMM
40 * version and to register its devices. Each device have an unique (for the
41 * configured VM) name. The name is not only used in PDM but also in CFGM (to
42 * organize device and device instance settings) and by anyone who wants to talk
43 * to a specific device instance.
44 *
45 * When all device modules have been successfully loaded PDM will instantiate
46 * those devices which are configured for the VM. Note that a device may have
47 * more than one instance, see network adaptors for instance. When
48 * instantiating a device PDM provides device instance memory and a callback
49 * table (aka Device Helpers / DevHlp) with the VM APIs which the device
50 * instance is trusted with.
51 *
52 * Some devices are trusted devices, most are not. The trusted devices are an
53 * integrated part of the VM and can obtain the VM handle from their device
54 * instance handles, thus enabling them to call any VM api. Untrusted devices
55 * can only use the callbacks provided during device instantiation.
56 *
57 * The main purpose in having DevHlps rather than just giving all the devices
58 * the VM handle and let them call the internal VM APIs directly, is both to
59 * create a binary interface that can be supported across releases and to
60 * create a barrier between devices and the VM. (The trusted / untrusted bit
61 * hasn't turned out to be of much use btw., but it's easy to maintain so there
62 * isn't any point in removing it.)
63 *
64 * A device can provide a ring-0 and/or a raw-mode context extension to improve
65 * the VM performance by handling exits and traps (respectively) without
66 * requiring context switches (to ring-3). Callbacks for MMIO and I/O ports can
67 * needs to be registered specifically for the additional contexts for this to
68 * make sense. Also, the device has to be trusted to be loaded into R0/RC
69 * because of the extra privilege it entails. Note that raw-mode code and data
70 * will be subject to relocation.
71 *
72 *
73 * @section sec_pdm_special_devs Special Devices
74 *
75 * Several kinds of devices interacts with the VMM and/or other device and PDM
76 * will work like a mediator for these. The typical pattern is that the device
77 * calls a special registration device helper with a set of callbacks, PDM
78 * responds by copying this and providing a pointer to a set helper callbacks
79 * for that particular kind of device. Unlike interfaces where the callback
80 * table pointer is used a 'this' pointer, these arrangements will use the
81 * device instance pointer (PPDMDEVINS) as a kind of 'this' pointer.
82 *
83 * For an example of this kind of setup, see the PIC. The PIC registers itself
84 * by calling PDMDEVHLPR3::pfnPICRegister. PDM saves the device instance,
85 * copies the callback tables (PDMPICREG), resolving the ring-0 and raw-mode
86 * addresses in the process, and hands back the pointer to a set of helper
87 * methods (PDMPICHLPR3). The PCI device then queries the ring-0 and raw-mode
88 * helpers using PDMPICHLPR3::pfnGetR0Helpers and PDMPICHLPR3::pfnGetRCHelpers.
89 * The PCI device repeats ths pfnGetRCHelpers call in it's relocation method
90 * since the address changes when RC is relocated.
91 *
92 * @see grp_pdm_device
93 *
94 *
95 * @section sec_pdm_usbdev The Pluggable USB Devices
96 *
97 * USB devices are handled a little bit differently than other devices. The
98 * general concepts wrt. pluggability are mostly the same, but the details
99 * varies. The registration entry point is 'VBoxUsbRegister', the device
100 * instance is PDMUSBINS and the callbacks helpers are different. Also, USB
101 * device are restricted to ring-3 and cannot have any ring-0 or raw-mode
102 * extensions (at least not yet).
103 *
104 * The way USB devices work differs greatly from other devices though since they
105 * aren't attaches directly to the PCI/ISA/whatever system buses but via a
106 * USB host control (OHCI, UHCI or EHCI). USB devices handles USB requests
107 * (URBs) and does not register I/O ports, MMIO ranges or PCI bus
108 * devices/functions.
109 *
110 * @see grp_pdm_usbdev
111 *
112 *
113 * @section sec_pdm_drv The Pluggable Drivers
114 *
115 * The VM devices are often accessing host hardware or OS facilities. For most
116 * devices these facilities can be abstracted in one or more levels. These
117 * abstractions are called drivers.
118 *
119 * For instance take a DVD/CD drive. This can be connected to a SCSI
120 * controller, an ATA controller or a SATA controller. The basics of the DVD/CD
121 * drive implementation remains the same - eject, insert, read, seek, and such.
122 * (For the scsi case, you might wanna speak SCSI directly to, but that can of
123 * course be fixed - see SCSI passthru.) So, it
124 * makes much sense to have a generic CD/DVD driver which implements this.
125 *
126 * Then the media 'inserted' into the DVD/CD drive can be a ISO image, or it can
127 * be read from a real CD or DVD drive (there are probably other custom formats
128 * someone could desire to read or construct too). So, it would make sense to
129 * have abstracted interfaces for dealing with this in a generic way so the
130 * cdrom unit doesn't have to implement it all. Thus we have created the
131 * CDROM/DVD media driver family.
132 *
133 * So, for this example the IDE controller #1 (i.e. secondary) will have
134 * the DVD/CD Driver attached to it's LUN #0 (master). When a media is mounted
135 * the DVD/CD Driver will have a ISO, HostDVD or RAW (media) Driver attached.
136 *
137 * It is possible to configure many levels of drivers inserting filters, loggers,
138 * or whatever you desire into the chain. We're using this for network sniffing
139 * for instance.
140 *
141 * The drivers are loaded in a similar manner to that of the device, namely by
142 * iterating a keyspace in CFGM, load the modules listed there and call
143 * 'VBoxDriversRegister' with a callback table.
144 *
145 * @see grp_pdm_driver
146 *
147 *
148 * @section sec_pdm_ifs Interfaces
149 *
150 * The pluggable drivers and devices exposes one standard interface (callback
151 * table) which is used to construct, destruct, attach, detach,( ++,) and query
152 * other interfaces. A device will query the interfaces required for it's
153 * operation during init and hot-plug. PDM may query some interfaces during
154 * runtime mounting too.
155 *
156 * An interface here means a function table contained within the device or
157 * driver instance data. Its method are invoked with the function table pointer
158 * as the first argument and they will calculate the address of the device or
159 * driver instance data from it. (This is one of the aspects which *might* have
160 * been better done in C++.)
161 *
162 * @see grp_pdm_interfaces
163 *
164 *
165 * @section sec_pdm_utils Utilities
166 *
167 * As mentioned earlier, PDM is the location of any usful constructs that doesn't
168 * quite fit into IPRT. The next subsections will discuss these.
169 *
170 * One thing these APIs all have in common is that resources will be associated
171 * with a device / driver and automatically freed after it has been destroyed if
172 * the destructor didn't do this.
173 *
174 *
175 * @subsection sec_pdm_async_completion Async I/O
176 *
177 * The PDM Async I/O API provides a somewhat platform agnostic interface for
178 * asynchronous I/O. For reasons of performance and complexity this does not
179 * build upon any IPRT API.
180 *
181 * @todo more details.
182 *
183 * @see grp_pdm_async_completion
184 *
185 *
186 * @subsection sec_pdm_async_task Async Task - not implemented
187 *
188 * @todo implement and describe
189 *
190 * @see grp_pdm_async_task
191 *
192 *
193 * @subsection sec_pdm_critsect Critical Section
194 *
195 * The PDM Critical Section API is currently building on the IPRT API with the
196 * same name. It adds the possibility to use critical sections in ring-0 and
197 * raw-mode as well as in ring-3. There are certain restrictions on the RC and
198 * R0 usage though since we're not able to wait on it, nor wake up anyone that
199 * is waiting on it. These restrictions origins with the use of a ring-3 event
200 * semaphore. In a later incarnation we plan to replace the ring-3 event
201 * semaphore with a ring-0 one, thus enabling us to wake up waiters while
202 * exectuing in ring-0 and making the hardware assisted execution mode more
203 * efficient. (Raw-mode won't benefit much from this, naturally.)
204 *
205 * @see grp_pdm_critsect
206 *
207 *
208 * @subsection sec_pdm_queue Queue
209 *
210 * The PDM Queue API is for queuing one or more tasks for later consumption in
211 * ring-3 by EMT, and optionally forcing a delayed or ASAP return to ring-3. The
212 * queues can also be run on a timer basis as an alternative to the ASAP thing.
213 * The queue will be flushed at forced action time.
214 *
215 * A queue can also be used by another thread (a I/O worker for instance) to
216 * send work / events over to the EMT.
217 *
218 * @see grp_pdm_queue
219 *
220 *
221 * @subsection sec_pdm_task Task - not implemented yet
222 *
223 * The PDM Task API is for flagging a task for execution at a later point when
224 * we're back in ring-3, optionally forcing the ring-3 return to happen ASAP.
225 * As you can see the concept is similar to queues only simpler.
226 *
227 * A task can also be scheduled by another thread (a I/O worker for instance) as
228 * a mean of getting something done in EMT.
229 *
230 * @see grp_pdm_task
231 *
232 *
233 * @subsection sec_pdm_thread Thread
234 *
235 * The PDM Thread API is there to help devices and drivers manage their threads
236 * correctly wrt. power on, suspend, resume, power off and destruction.
237 *
238 * The general usage pattern for threads in the employ of devices and drivers is
239 * that they shuffle data or requests while the VM is running and stop doing
240 * this when the VM is paused or powered down. Rogue threads running while the
241 * VM is paused can cause the state to change during saving or have other
242 * unwanted side effects. The PDM Threads API ensures that this won't happen.
243 *
244 * @see grp_pdm_thread
245 *
246 */
247
248
249/*******************************************************************************
250* Header Files *
251*******************************************************************************/
252#define LOG_GROUP LOG_GROUP_PDM
253#include "PDMInternal.h"
254#include <VBox/vmm/pdm.h>
255#include <VBox/vmm/mm.h>
256#include <VBox/vmm/pgm.h>
257#include <VBox/vmm/ssm.h>
258#include <VBox/vmm/vm.h>
259#include <VBox/vmm/uvm.h>
260#include <VBox/vmm/vmm.h>
261#include <VBox/param.h>
262#include <VBox/err.h>
263#include <VBox/sup.h>
264
265#include <VBox/log.h>
266#include <iprt/asm.h>
267#include <iprt/assert.h>
268#include <iprt/alloc.h>
269#include <iprt/ldr.h>
270#include <iprt/path.h>
271#include <iprt/string.h>
272
273
274/*******************************************************************************
275* Defined Constants And Macros *
276*******************************************************************************/
277/** The PDM saved state version. */
278#define PDM_SAVED_STATE_VERSION 4
279#define PDM_SAVED_STATE_VERSION_PRE_NMI_FF 3
280
281
282/*******************************************************************************
283* Internal Functions *
284*******************************************************************************/
285static DECLCALLBACK(int) pdmR3LiveExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass);
286static DECLCALLBACK(int) pdmR3SaveExec(PVM pVM, PSSMHANDLE pSSM);
287static DECLCALLBACK(int) pdmR3LoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass);
288static DECLCALLBACK(int) pdmR3LoadPrep(PVM pVM, PSSMHANDLE pSSM);
289
290
291
292/**
293 * Initializes the PDM part of the UVM.
294 *
295 * This doesn't really do much right now but has to be here for the sake
296 * of completeness.
297 *
298 * @returns VBox status code.
299 * @param pUVM Pointer to the user mode VM structure.
300 */
301VMMR3DECL(int) PDMR3InitUVM(PUVM pUVM)
302{
303 AssertCompile(sizeof(pUVM->pdm.s) <= sizeof(pUVM->pdm.padding));
304 AssertRelease(sizeof(pUVM->pdm.s) <= sizeof(pUVM->pdm.padding));
305 pUVM->pdm.s.pModules = NULL;
306 pUVM->pdm.s.pCritSects = NULL;
307 return RTCritSectInit(&pUVM->pdm.s.ListCritSect);
308}
309
310
311/**
312 * Initializes the PDM.
313 *
314 * @returns VBox status code.
315 * @param pVM The VM to operate on.
316 */
317VMMR3DECL(int) PDMR3Init(PVM pVM)
318{
319 LogFlow(("PDMR3Init\n"));
320
321 /*
322 * Assert alignment and sizes.
323 */
324 AssertRelease(!(RT_OFFSETOF(VM, pdm.s) & 31));
325 AssertRelease(sizeof(pVM->pdm.s) <= sizeof(pVM->pdm.padding));
326 AssertCompileMemberAlignment(PDM, CritSect, sizeof(uintptr_t));
327 /*
328 * Init the structure.
329 */
330 pVM->pdm.s.offVM = RT_OFFSETOF(VM, pdm.s);
331 pVM->pdm.s.GCPhysVMMDevHeap = NIL_RTGCPHYS;
332
333 /*
334 * Initialize sub components.
335 */
336 int rc = pdmR3CritSectInitStats(pVM);
337 if (RT_SUCCESS(rc))
338 rc = PDMR3CritSectInit(pVM, &pVM->pdm.s.CritSect, RT_SRC_POS, "PDM");
339 if (RT_SUCCESS(rc))
340 rc = pdmR3LdrInitU(pVM->pUVM);
341#ifdef VBOX_WITH_PDM_ASYNC_COMPLETION
342 if (RT_SUCCESS(rc))
343 rc = pdmR3AsyncCompletionInit(pVM);
344#endif
345 if (RT_SUCCESS(rc))
346 rc = pdmR3BlkCacheInit(pVM);
347 if (RT_SUCCESS(rc))
348 rc = pdmR3DrvInit(pVM);
349 if (RT_SUCCESS(rc))
350 rc = pdmR3DevInit(pVM);
351 if (RT_SUCCESS(rc))
352 {
353 /*
354 * Register the saved state data unit.
355 */
356 rc = SSMR3RegisterInternal(pVM, "pdm", 1, PDM_SAVED_STATE_VERSION, 128,
357 NULL, pdmR3LiveExec, NULL,
358 NULL, pdmR3SaveExec, NULL,
359 pdmR3LoadPrep, pdmR3LoadExec, NULL);
360 if (RT_SUCCESS(rc))
361 {
362 LogFlow(("PDM: Successfully initialized\n"));
363 return rc;
364 }
365 }
366
367 /*
368 * Cleanup and return failure.
369 */
370 PDMR3Term(pVM);
371 LogFlow(("PDMR3Init: returns %Rrc\n", rc));
372 return rc;
373}
374
375
376/**
377 * Applies relocations to data and code managed by this
378 * component. This function will be called at init and
379 * whenever the VMM need to relocate it self inside the GC.
380 *
381 * @param pVM VM handle.
382 * @param offDelta Relocation delta relative to old location.
383 * @remark The loader subcomponent is relocated by PDMR3LdrRelocate() very
384 * early in the relocation phase.
385 */
386VMMR3DECL(void) PDMR3Relocate(PVM pVM, RTGCINTPTR offDelta)
387{
388 LogFlow(("PDMR3Relocate\n"));
389
390 /*
391 * Queues.
392 */
393 pdmR3QueueRelocate(pVM, offDelta);
394 pVM->pdm.s.pDevHlpQueueRC = PDMQueueRCPtr(pVM->pdm.s.pDevHlpQueueR3);
395
396 /*
397 * Critical sections.
398 */
399 pdmR3CritSectRelocate(pVM);
400
401 /*
402 * The registered PIC.
403 */
404 if (pVM->pdm.s.Pic.pDevInsRC)
405 {
406 pVM->pdm.s.Pic.pDevInsRC += offDelta;
407 pVM->pdm.s.Pic.pfnSetIrqRC += offDelta;
408 pVM->pdm.s.Pic.pfnGetInterruptRC += offDelta;
409 }
410
411 /*
412 * The registered APIC.
413 */
414 if (pVM->pdm.s.Apic.pDevInsRC)
415 {
416 pVM->pdm.s.Apic.pDevInsRC += offDelta;
417 pVM->pdm.s.Apic.pfnGetInterruptRC += offDelta;
418 pVM->pdm.s.Apic.pfnSetBaseRC += offDelta;
419 pVM->pdm.s.Apic.pfnGetBaseRC += offDelta;
420 pVM->pdm.s.Apic.pfnSetTPRRC += offDelta;
421 pVM->pdm.s.Apic.pfnGetTPRRC += offDelta;
422 pVM->pdm.s.Apic.pfnBusDeliverRC += offDelta;
423 if (pVM->pdm.s.Apic.pfnLocalInterruptRC)
424 pVM->pdm.s.Apic.pfnLocalInterruptRC += offDelta;
425 pVM->pdm.s.Apic.pfnWriteMSRRC += offDelta;
426 pVM->pdm.s.Apic.pfnReadMSRRC += offDelta;
427 }
428
429 /*
430 * The registered I/O APIC.
431 */
432 if (pVM->pdm.s.IoApic.pDevInsRC)
433 {
434 pVM->pdm.s.IoApic.pDevInsRC += offDelta;
435 pVM->pdm.s.IoApic.pfnSetIrqRC += offDelta;
436 if (pVM->pdm.s.IoApic.pfnSendMsiRC)
437 pVM->pdm.s.IoApic.pfnSendMsiRC += offDelta;
438 }
439
440 /*
441 * The register PCI Buses.
442 */
443 for (unsigned i = 0; i < RT_ELEMENTS(pVM->pdm.s.aPciBuses); i++)
444 {
445 if (pVM->pdm.s.aPciBuses[i].pDevInsRC)
446 {
447 pVM->pdm.s.aPciBuses[i].pDevInsRC += offDelta;
448 pVM->pdm.s.aPciBuses[i].pfnSetIrqRC += offDelta;
449 }
450 }
451
452 /*
453 * Devices & Drivers.
454 */
455 PCPDMDEVHLPRC pDevHlpRC;
456 int rc = PDMR3LdrGetSymbolRC(pVM, NULL, "g_pdmRCDevHlp", &pDevHlpRC);
457 AssertReleaseMsgRC(rc, ("rc=%Rrc when resolving g_pdmRCDevHlp\n", rc));
458
459 PCPDMDRVHLPRC pDrvHlpRC;
460 rc = PDMR3LdrGetSymbolRC(pVM, NULL, "g_pdmRCDevHlp", &pDrvHlpRC);
461 AssertReleaseMsgRC(rc, ("rc=%Rrc when resolving g_pdmRCDevHlp\n", rc));
462
463 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
464 {
465 if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_RC)
466 {
467 pDevIns->pHlpRC = pDevHlpRC;
468 pDevIns->pvInstanceDataRC = MMHyperR3ToRC(pVM, pDevIns->pvInstanceDataR3);
469 if (pDevIns->pCritSectR3)
470 pDevIns->pCritSectRC = MMHyperR3ToRC(pVM, pDevIns->pCritSectR3);
471 pDevIns->Internal.s.pVMRC = pVM->pVMRC;
472 if (pDevIns->Internal.s.pPciBusR3)
473 pDevIns->Internal.s.pPciBusRC = MMHyperR3ToRC(pVM, pDevIns->Internal.s.pPciBusR3);
474 if (pDevIns->Internal.s.pPciDeviceR3)
475 pDevIns->Internal.s.pPciDeviceRC = MMHyperR3ToRC(pVM, pDevIns->Internal.s.pPciDeviceR3);
476 if (pDevIns->pReg->pfnRelocate)
477 {
478 LogFlow(("PDMR3Relocate: Relocating device '%s'/%d\n",
479 pDevIns->pReg->szName, pDevIns->iInstance));
480 pDevIns->pReg->pfnRelocate(pDevIns, offDelta);
481 }
482 }
483
484 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
485 {
486 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
487 {
488 if (pDrvIns->pReg->fFlags & PDM_DRVREG_FLAGS_RC)
489 {
490 pDrvIns->pHlpRC = pDrvHlpRC;
491 pDrvIns->pvInstanceDataRC = MMHyperR3ToRC(pVM, pDrvIns->pvInstanceDataR3);
492 pDrvIns->Internal.s.pVMRC = pVM->pVMRC;
493 if (pDrvIns->pReg->pfnRelocate)
494 {
495 LogFlow(("PDMR3Relocate: Relocating driver '%s'/%u attached to '%s'/%d/%u\n",
496 pDrvIns->pReg->szName, pDrvIns->iInstance,
497 pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun));
498 pDrvIns->pReg->pfnRelocate(pDrvIns, offDelta);
499 }
500 }
501 }
502 }
503
504 }
505}
506
507
508/**
509 * Worker for pdmR3Term that terminates a LUN chain.
510 *
511 * @param pVM Pointer to the shared VM structure.
512 * @param pLun The head of the chain.
513 * @param pszDevice The name of the device (for logging).
514 * @param iInstance The device instance number (for logging).
515 */
516static void pdmR3TermLuns(PVM pVM, PPDMLUN pLun, const char *pszDevice, unsigned iInstance)
517{
518 for (; pLun; pLun = pLun->pNext)
519 {
520 /*
521 * Destroy them one at a time from the bottom up.
522 * (The serial device/drivers depends on this - bad.)
523 */
524 PPDMDRVINS pDrvIns = pLun->pBottom;
525 pLun->pBottom = pLun->pTop = NULL;
526 while (pDrvIns)
527 {
528 PPDMDRVINS pDrvNext = pDrvIns->Internal.s.pUp;
529
530 if (pDrvIns->pReg->pfnDestruct)
531 {
532 LogFlow(("pdmR3DevTerm: Destroying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
533 pDrvIns->pReg->szName, pDrvIns->iInstance, pLun->iLun, pszDevice, iInstance));
534 pDrvIns->pReg->pfnDestruct(pDrvIns);
535 }
536 pDrvIns->Internal.s.pDrv->cInstances--;
537
538 TMR3TimerDestroyDriver(pVM, pDrvIns);
539 //PDMR3QueueDestroyDriver(pVM, pDrvIns);
540 //pdmR3ThreadDestroyDriver(pVM, pDrvIns);
541 SSMR3DeregisterDriver(pVM, pDrvIns, NULL, 0);
542
543 pDrvIns = pDrvNext;
544 }
545 }
546}
547
548
549/**
550 * Terminates the PDM.
551 *
552 * Termination means cleaning up and freeing all resources,
553 * the VM it self is at this point powered off or suspended.
554 *
555 * @returns VBox status code.
556 * @param pVM The VM to operate on.
557 */
558VMMR3DECL(int) PDMR3Term(PVM pVM)
559{
560 LogFlow(("PDMR3Term:\n"));
561 AssertMsg(pVM->pdm.s.offVM, ("bad init order!\n"));
562
563 /*
564 * Iterate the device instances and attach drivers, doing
565 * relevant destruction processing.
566 *
567 * N.B. There is no need to mess around freeing memory allocated
568 * from any MM heap since MM will do that in its Term function.
569 */
570 /* usb ones first. */
571 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns; pUsbIns = pUsbIns->Internal.s.pNext)
572 {
573 pdmR3TermLuns(pVM, pUsbIns->Internal.s.pLuns, pUsbIns->pReg->szName, pUsbIns->iInstance);
574
575 if (pUsbIns->pReg->pfnDestruct)
576 {
577 LogFlow(("pdmR3DevTerm: Destroying - device '%s'/%d\n",
578 pUsbIns->pReg->szName, pUsbIns->iInstance));
579 pUsbIns->pReg->pfnDestruct(pUsbIns);
580 }
581
582 //TMR3TimerDestroyUsb(pVM, pUsbIns);
583 //SSMR3DeregisterUsb(pVM, pUsbIns, NULL, 0);
584 pdmR3ThreadDestroyUsb(pVM, pUsbIns);
585 }
586
587 /* then the 'normal' ones. */
588 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
589 {
590 pdmR3TermLuns(pVM, pDevIns->Internal.s.pLunsR3, pDevIns->pReg->szName, pDevIns->iInstance);
591
592 if (pDevIns->pReg->pfnDestruct)
593 {
594 LogFlow(("pdmR3DevTerm: Destroying - device '%s'/%d\n",
595 pDevIns->pReg->szName, pDevIns->iInstance));
596 pDevIns->pReg->pfnDestruct(pDevIns);
597 }
598
599 TMR3TimerDestroyDevice(pVM, pDevIns);
600 //SSMR3DeregisterDriver(pVM, pDevIns, NULL, 0);
601 pdmR3CritSectDeleteDevice(pVM, pDevIns);
602 //pdmR3ThreadDestroyDevice(pVM, pDevIns);
603 //PDMR3QueueDestroyDevice(pVM, pDevIns);
604 PGMR3PhysMMIO2Deregister(pVM, pDevIns, UINT32_MAX);
605 }
606
607 /*
608 * Destroy all threads.
609 */
610 pdmR3ThreadDestroyAll(pVM);
611
612 /*
613 * Destroy the block cache.
614 */
615 pdmR3BlkCacheTerm(pVM);
616
617#ifdef VBOX_WITH_PDM_ASYNC_COMPLETION
618 /*
619 * Free async completion managers.
620 */
621 pdmR3AsyncCompletionTerm(pVM);
622#endif
623
624 /*
625 * Free modules.
626 */
627 pdmR3LdrTermU(pVM->pUVM);
628
629 /*
630 * Destroy the PDM lock.
631 */
632 PDMR3CritSectDelete(&pVM->pdm.s.CritSect);
633 /* The MiscCritSect is deleted by PDMR3CritSectTerm. */
634
635 LogFlow(("PDMR3Term: returns %Rrc\n", VINF_SUCCESS));
636 return VINF_SUCCESS;
637}
638
639
640/**
641 * Terminates the PDM part of the UVM.
642 *
643 * This will unload any modules left behind.
644 *
645 * @param pUVM Pointer to the user mode VM structure.
646 */
647VMMR3DECL(void) PDMR3TermUVM(PUVM pUVM)
648{
649 /*
650 * In the normal cause of events we will now call pdmR3LdrTermU for
651 * the second time. In the case of init failure however, this might
652 * the first time, which is why we do it.
653 */
654 pdmR3LdrTermU(pUVM);
655
656 Assert(pUVM->pdm.s.pCritSects == NULL);
657 RTCritSectDelete(&pUVM->pdm.s.ListCritSect);
658}
659
660
661/**
662 * Bits that are saved in pass 0 and in the final pass.
663 *
664 * @param pVM The VM handle.
665 * @param pSSM The saved state handle.
666 */
667static void pdmR3SaveBoth(PVM pVM, PSSMHANDLE pSSM)
668{
669 /*
670 * Save the list of device instances so we can check that they're all still
671 * there when we load the state and that nothing new has been added.
672 */
673 uint32_t i = 0;
674 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3, i++)
675 {
676 SSMR3PutU32(pSSM, i);
677 SSMR3PutStrZ(pSSM, pDevIns->pReg->szName);
678 SSMR3PutU32(pSSM, pDevIns->iInstance);
679 }
680 SSMR3PutU32(pSSM, UINT32_MAX); /* terminator */
681}
682
683
684/**
685 * Live save.
686 *
687 * @returns VBox status code.
688 * @param pVM The VM handle.
689 * @param pSSM The saved state handle.
690 * @param uPass The pass.
691 */
692static DECLCALLBACK(int) pdmR3LiveExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uPass)
693{
694 LogFlow(("pdmR3LiveExec:\n"));
695 AssertReturn(uPass == 0, VERR_INTERNAL_ERROR_4);
696 pdmR3SaveBoth(pVM, pSSM);
697 return VINF_SSM_DONT_CALL_AGAIN;
698}
699
700
701/**
702 * Execute state save operation.
703 *
704 * @returns VBox status code.
705 * @param pVM The VM handle.
706 * @param pSSM The saved state handle.
707 */
708static DECLCALLBACK(int) pdmR3SaveExec(PVM pVM, PSSMHANDLE pSSM)
709{
710 LogFlow(("pdmR3SaveExec:\n"));
711
712 /*
713 * Save interrupt and DMA states.
714 */
715 for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
716 {
717 PVMCPU pVCpu = &pVM->aCpus[idCpu];
718 SSMR3PutU32(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_APIC));
719 SSMR3PutU32(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_PIC));
720 SSMR3PutU32(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_NMI));
721 SSMR3PutU32(pSSM, VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_SMI));
722 }
723 SSMR3PutU32(pSSM, VM_FF_ISSET(pVM, VM_FF_PDM_DMA));
724
725 pdmR3SaveBoth(pVM, pSSM);
726 return VINF_SUCCESS;
727}
728
729
730/**
731 * Prepare state load operation.
732 *
733 * This will dispatch pending operations and clear the FFs governed by PDM and its devices.
734 *
735 * @returns VBox status code.
736 * @param pVM The VM handle.
737 * @param pSSM The SSM handle.
738 */
739static DECLCALLBACK(int) pdmR3LoadPrep(PVM pVM, PSSMHANDLE pSSM)
740{
741 LogFlow(("pdmR3LoadPrep: %s%s\n",
742 VM_FF_ISSET(pVM, VM_FF_PDM_QUEUES) ? " VM_FF_PDM_QUEUES" : "",
743 VM_FF_ISSET(pVM, VM_FF_PDM_DMA) ? " VM_FF_PDM_DMA" : ""));
744#ifdef LOG_ENABLED
745 for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
746 {
747 PVMCPU pVCpu = &pVM->aCpus[idCpu];
748 LogFlow(("pdmR3LoadPrep: VCPU %u %s%s\n", idCpu,
749 VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_APIC) ? " VMCPU_FF_INTERRUPT_APIC" : "",
750 VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_PIC) ? " VMCPU_FF_INTERRUPT_PIC" : ""));
751 }
752#endif
753
754 /*
755 * In case there is work pending that will raise an interrupt,
756 * start a DMA transfer, or release a lock. (unlikely)
757 */
758 if (VM_FF_ISSET(pVM, VM_FF_PDM_QUEUES))
759 PDMR3QueueFlushAll(pVM);
760
761 /* Clear the FFs. */
762 for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
763 {
764 PVMCPU pVCpu = &pVM->aCpus[idCpu];
765 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_APIC);
766 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_PIC);
767 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_NMI);
768 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_SMI);
769 }
770 VM_FF_CLEAR(pVM, VM_FF_PDM_DMA);
771
772 return VINF_SUCCESS;
773}
774
775
776/**
777 * Execute state load operation.
778 *
779 * @returns VBox status code.
780 * @param pVM VM Handle.
781 * @param pSSM SSM operation handle.
782 * @param uVersion Data layout version.
783 * @param uPass The data pass.
784 */
785static DECLCALLBACK(int) pdmR3LoadExec(PVM pVM, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
786{
787 int rc;
788
789 LogFlow(("pdmR3LoadExec: uPass=%#x\n", uPass));
790
791 /*
792 * Validate version.
793 */
794 if ( uVersion != PDM_SAVED_STATE_VERSION
795 && uVersion != PDM_SAVED_STATE_VERSION_PRE_NMI_FF)
796 {
797 AssertMsgFailed(("Invalid version uVersion=%d!\n", uVersion));
798 return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
799 }
800
801 if (uPass == SSM_PASS_FINAL)
802 {
803 /*
804 * Load the interrupt and DMA states.
805 */
806 for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
807 {
808 PVMCPU pVCpu = &pVM->aCpus[idCpu];
809
810 /* APIC interrupt */
811 uint32_t fInterruptPending = 0;
812 rc = SSMR3GetU32(pSSM, &fInterruptPending);
813 if (RT_FAILURE(rc))
814 return rc;
815 if (fInterruptPending & ~1)
816 {
817 AssertMsgFailed(("fInterruptPending=%#x (APIC)\n", fInterruptPending));
818 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
819 }
820 AssertRelease(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_APIC));
821 if (fInterruptPending)
822 VMCPU_FF_SET(pVCpu, VMCPU_FF_INTERRUPT_APIC);
823
824 /* PIC interrupt */
825 fInterruptPending = 0;
826 rc = SSMR3GetU32(pSSM, &fInterruptPending);
827 if (RT_FAILURE(rc))
828 return rc;
829 if (fInterruptPending & ~1)
830 {
831 AssertMsgFailed(("fInterruptPending=%#x (PIC)\n", fInterruptPending));
832 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
833 }
834 AssertRelease(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_PIC));
835 if (fInterruptPending)
836 VMCPU_FF_SET(pVCpu, VMCPU_FF_INTERRUPT_PIC);
837
838 if (uVersion > PDM_SAVED_STATE_VERSION_PRE_NMI_FF)
839 {
840 /* NMI interrupt */
841 fInterruptPending = 0;
842 rc = SSMR3GetU32(pSSM, &fInterruptPending);
843 if (RT_FAILURE(rc))
844 return rc;
845 if (fInterruptPending & ~1)
846 {
847 AssertMsgFailed(("fInterruptPending=%#x (NMI)\n", fInterruptPending));
848 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
849 }
850 AssertRelease(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_NMI));
851 if (fInterruptPending)
852 VMCPU_FF_SET(pVCpu, VMCPU_FF_INTERRUPT_NMI);
853
854 /* SMI interrupt */
855 fInterruptPending = 0;
856 rc = SSMR3GetU32(pSSM, &fInterruptPending);
857 if (RT_FAILURE(rc))
858 return rc;
859 if (fInterruptPending & ~1)
860 {
861 AssertMsgFailed(("fInterruptPending=%#x (SMI)\n", fInterruptPending));
862 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
863 }
864 AssertRelease(!VMCPU_FF_ISSET(pVCpu, VMCPU_FF_INTERRUPT_SMI));
865 if (fInterruptPending)
866 VMCPU_FF_SET(pVCpu, VMCPU_FF_INTERRUPT_SMI);
867 }
868 }
869
870 /* DMA pending */
871 uint32_t fDMAPending = 0;
872 rc = SSMR3GetU32(pSSM, &fDMAPending);
873 if (RT_FAILURE(rc))
874 return rc;
875 if (fDMAPending & ~1)
876 {
877 AssertMsgFailed(("fDMAPending=%#x\n", fDMAPending));
878 return VERR_SSM_DATA_UNIT_FORMAT_CHANGED;
879 }
880 if (fDMAPending)
881 VM_FF_SET(pVM, VM_FF_PDM_DMA);
882 Log(("pdmR3LoadExec: VM_FF_PDM_DMA=%RTbool\n", VM_FF_ISSET(pVM, VM_FF_PDM_DMA)));
883 }
884
885 /*
886 * Load the list of devices and verify that they are all there.
887 */
888 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
889 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_FOUND;
890
891 for (uint32_t i = 0; ; i++)
892 {
893 /* Get the sequence number / terminator. */
894 uint32_t u32Sep;
895 rc = SSMR3GetU32(pSSM, &u32Sep);
896 if (RT_FAILURE(rc))
897 return rc;
898 if (u32Sep == UINT32_MAX)
899 break;
900 if (u32Sep != i)
901 AssertMsgFailedReturn(("Out of sequence. u32Sep=%#x i=%#x\n", u32Sep, i), VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
902
903 /* Get the name and instance number. */
904 char szName[RT_SIZEOFMEMB(PDMDEVREG, szName)];
905 rc = SSMR3GetStrZ(pSSM, szName, sizeof(szName));
906 if (RT_FAILURE(rc))
907 return rc;
908 uint32_t iInstance;
909 rc = SSMR3GetU32(pSSM, &iInstance);
910 if (RT_FAILURE(rc))
911 return rc;
912
913 /* Try locate it. */
914 PPDMDEVINS pDevIns;
915 for (pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
916 if ( !strcmp(szName, pDevIns->pReg->szName)
917 && pDevIns->iInstance == iInstance)
918 {
919 AssertLogRelMsgReturn(!(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_FOUND),
920 ("%s/#%u\n", pDevIns->pReg->szName, pDevIns->iInstance),
921 VERR_SSM_DATA_UNIT_FORMAT_CHANGED);
922 pDevIns->Internal.s.fIntFlags |= PDMDEVINSINT_FLAGS_FOUND;
923 break;
924 }
925 if (!pDevIns)
926 {
927 LogRel(("Device '%s'/%d not found in current config\n", szName, iInstance));
928 if (SSMR3HandleGetAfter(pSSM) != SSMAFTER_DEBUG_IT)
929 return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Device '%s'/%d not found in current config"), szName, iInstance);
930 }
931 }
932
933 /*
934 * Check that no additional devices were configured.
935 */
936 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
937 if (!(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_FOUND))
938 {
939 LogRel(("Device '%s'/%d not found in the saved state\n", pDevIns->pReg->szName, pDevIns->iInstance));
940 if (SSMR3HandleGetAfter(pSSM) != SSMAFTER_DEBUG_IT)
941 return SSMR3SetCfgError(pSSM, RT_SRC_POS, N_("Device '%s'/%d not found in the saved state"),
942 pDevIns->pReg->szName, pDevIns->iInstance);
943 }
944
945 return VINF_SUCCESS;
946}
947
948
949/**
950 * Worker for PDMR3PowerOn that deals with one driver.
951 *
952 * @param pDrvIns The driver instance.
953 * @param pszDeviceName The parent device name.
954 * @param iDevInstance The parent device instance number.
955 * @param iLun The parent LUN number.
956 */
957DECLINLINE(int) pdmR3PowerOnDrv(PPDMDRVINS pDrvIns, const char *pszDeviceName, uint32_t iDevInstance, uint32_t iLun)
958{
959 Assert(pDrvIns->Internal.s.fVMSuspended);
960 if (pDrvIns->pReg->pfnPowerOn)
961 {
962 LogFlow(("PDMR3PowerOn: Notifying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
963 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
964 int rc = VINF_SUCCESS; pDrvIns->pReg->pfnPowerOn(pDrvIns);
965 if (RT_FAILURE(rc))
966 {
967 LogRel(("PDMR3PowerOn: driver '%s'/%d on LUN#%d of device '%s'/%d -> %Rrc\n",
968 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance, rc));
969 return rc;
970 }
971 }
972 pDrvIns->Internal.s.fVMSuspended = false;
973 return VINF_SUCCESS;
974}
975
976
977/**
978 * Worker for PDMR3PowerOn that deals with one USB device instance.
979 *
980 * @returns VBox status code.
981 * @param pUsbIns The USB device instance.
982 */
983DECLINLINE(int) pdmR3PowerOnUsb(PPDMUSBINS pUsbIns)
984{
985 Assert(pUsbIns->Internal.s.fVMSuspended);
986 if (pUsbIns->pReg->pfnVMPowerOn)
987 {
988 LogFlow(("PDMR3PowerOn: Notifying - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
989 int rc = VINF_SUCCESS; pUsbIns->pReg->pfnVMPowerOn(pUsbIns);
990 if (RT_FAILURE(rc))
991 {
992 LogRel(("PDMR3PowerOn: device '%s'/%d -> %Rrc\n", pUsbIns->pReg->szName, pUsbIns->iInstance, rc));
993 return rc;
994 }
995 }
996 pUsbIns->Internal.s.fVMSuspended = false;
997 return VINF_SUCCESS;
998}
999
1000
1001/**
1002 * Worker for PDMR3PowerOn that deals with one device instance.
1003 *
1004 * @returns VBox status code.
1005 * @param pDevIns The device instance.
1006 */
1007DECLINLINE(int) pdmR3PowerOnDev(PPDMDEVINS pDevIns)
1008{
1009 Assert(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_SUSPENDED);
1010 if (pDevIns->pReg->pfnPowerOn)
1011 {
1012 LogFlow(("PDMR3PowerOn: Notifying - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1013 int rc = VINF_SUCCESS; pDevIns->pReg->pfnPowerOn(pDevIns);
1014 if (RT_FAILURE(rc))
1015 {
1016 LogRel(("PDMR3PowerOn: device '%s'/%d -> %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
1017 return rc;
1018 }
1019 }
1020 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_SUSPENDED;
1021 return VINF_SUCCESS;
1022}
1023
1024
1025/**
1026 * This function will notify all the devices and their
1027 * attached drivers about the VM now being powered on.
1028 *
1029 * @param pVM VM Handle.
1030 */
1031VMMR3DECL(void) PDMR3PowerOn(PVM pVM)
1032{
1033 LogFlow(("PDMR3PowerOn:\n"));
1034
1035 /*
1036 * Iterate thru the device instances and USB device instances,
1037 * processing the drivers associated with those.
1038 */
1039 int rc = VINF_SUCCESS;
1040 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns && RT_SUCCESS(rc); pDevIns = pDevIns->Internal.s.pNextR3)
1041 {
1042 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun && RT_SUCCESS(rc); pLun = pLun->pNext)
1043 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns && RT_SUCCESS(rc); pDrvIns = pDrvIns->Internal.s.pDown)
1044 rc = pdmR3PowerOnDrv(pDrvIns, pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun);
1045 if (RT_SUCCESS(rc))
1046 rc = pdmR3PowerOnDev(pDevIns);
1047 }
1048
1049#ifdef VBOX_WITH_USB
1050 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns && RT_SUCCESS(rc); pUsbIns = pUsbIns->Internal.s.pNext)
1051 {
1052 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun && RT_SUCCESS(rc); pLun = pLun->pNext)
1053 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns && RT_SUCCESS(rc); pDrvIns = pDrvIns->Internal.s.pDown)
1054 rc = pdmR3PowerOnDrv(pDrvIns, pUsbIns->pReg->szName, pUsbIns->iInstance, pLun->iLun);
1055 if (RT_SUCCESS(rc))
1056 rc = pdmR3PowerOnUsb(pUsbIns);
1057 }
1058#endif
1059
1060#ifdef VBOX_WITH_PDM_ASYNC_COMPLETION
1061 pdmR3AsyncCompletionResume(pVM);
1062#endif
1063
1064 /*
1065 * Resume all threads.
1066 */
1067 if (RT_SUCCESS(rc))
1068 pdmR3ThreadResumeAll(pVM);
1069
1070 /*
1071 * On failure, clean up via PDMR3Suspend.
1072 */
1073 if (RT_FAILURE(rc))
1074 PDMR3Suspend(pVM);
1075
1076 LogFlow(("PDMR3PowerOn: returns %Rrc\n", rc));
1077 return /*rc*/;
1078}
1079
1080
1081/**
1082 * Worker for PDMR3Reset that deals with one driver.
1083 *
1084 * @param pDrvIns The driver instance.
1085 * @param pcAsync The asynchronous reset notification counter.
1086 * @param pszDeviceName The parent device name.
1087 * @param iDevInstance The parent device instance number.
1088 * @param iLun The parent LUN number.
1089 */
1090DECLINLINE(bool) pdmR3ResetDrv(PPDMDRVINS pDrvIns, unsigned *pcAsync,
1091 const char *pszDeviceName, uint32_t iDevInstance, uint32_t iLun)
1092{
1093 if (!pDrvIns->Internal.s.fVMReset)
1094 {
1095 pDrvIns->Internal.s.fVMReset = true;
1096 if (pDrvIns->pReg->pfnReset)
1097 {
1098 if (!pDrvIns->Internal.s.pfnAsyncNotify)
1099 {
1100 LogFlow(("PDMR3Reset: Notifying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1101 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1102 pDrvIns->pReg->pfnReset(pDrvIns);
1103 if (pDrvIns->Internal.s.pfnAsyncNotify)
1104 LogFlow(("PDMR3Reset: Async notification started - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1105 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1106 }
1107 else if (pDrvIns->Internal.s.pfnAsyncNotify(pDrvIns))
1108 {
1109 pDrvIns->Internal.s.pfnAsyncNotify = false;
1110 LogFlow(("PDMR3Reset: Async notification completed - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1111 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1112 }
1113 if (pDrvIns->Internal.s.pfnAsyncNotify)
1114 {
1115 pDrvIns->Internal.s.fVMReset = false;
1116 (*pcAsync)++;
1117 return false;
1118 }
1119 }
1120 }
1121 return true;
1122}
1123
1124
1125/**
1126 * Worker for PDMR3Reset that deals with one USB device instance.
1127 *
1128 * @param pUsbIns The USB device instance.
1129 * @param pcAsync The asynchronous reset notification counter.
1130 */
1131DECLINLINE(void) pdmR3ResetUsb(PPDMUSBINS pUsbIns, unsigned *pcAsync)
1132{
1133 if (!pUsbIns->Internal.s.fVMReset)
1134 {
1135 pUsbIns->Internal.s.fVMReset = true;
1136 if (pUsbIns->pReg->pfnVMReset)
1137 {
1138 if (!pUsbIns->Internal.s.pfnAsyncNotify)
1139 {
1140 LogFlow(("PDMR3Reset: Notifying - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1141 pUsbIns->pReg->pfnVMReset(pUsbIns);
1142 if (pUsbIns->Internal.s.pfnAsyncNotify)
1143 LogFlow(("PDMR3Reset: Async notification started - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1144 }
1145 else if (pUsbIns->Internal.s.pfnAsyncNotify(pUsbIns))
1146 {
1147 LogFlow(("PDMR3Reset: Async notification completed - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1148 pUsbIns->Internal.s.pfnAsyncNotify = NULL;
1149 }
1150 if (pUsbIns->Internal.s.pfnAsyncNotify)
1151 {
1152 pUsbIns->Internal.s.fVMReset = false;
1153 (*pcAsync)++;
1154 }
1155 }
1156 }
1157}
1158
1159
1160/**
1161 * Worker for PDMR3Reset that deals with one device instance.
1162 *
1163 * @param pDevIns The device instance.
1164 * @param pcAsync The asynchronous reset notification counter.
1165 */
1166DECLINLINE(void) pdmR3ResetDev(PPDMDEVINS pDevIns, unsigned *pcAsync)
1167{
1168 if (!(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_RESET))
1169 {
1170 pDevIns->Internal.s.fIntFlags |= PDMDEVINSINT_FLAGS_RESET;
1171 if (pDevIns->pReg->pfnReset)
1172 {
1173 if (!pDevIns->Internal.s.pfnAsyncNotify)
1174 {
1175 LogFlow(("PDMR3Reset: Notifying - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1176 pDevIns->pReg->pfnReset(pDevIns);
1177 if (pDevIns->Internal.s.pfnAsyncNotify)
1178 LogFlow(("PDMR3Reset: Async notification started - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1179 }
1180 else if (pDevIns->Internal.s.pfnAsyncNotify(pDevIns))
1181 {
1182 LogFlow(("PDMR3Reset: Async notification completed - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1183 pDevIns->Internal.s.pfnAsyncNotify = NULL;
1184 }
1185 if (pDevIns->Internal.s.pfnAsyncNotify)
1186 {
1187 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_RESET;
1188 (*pcAsync)++;
1189 }
1190 }
1191 }
1192}
1193
1194
1195/**
1196 * Resets a virtual CPU.
1197 *
1198 * Used by PDMR3Reset and CPU hot plugging.
1199 *
1200 * @param pVCpu The virtual CPU handle.
1201 */
1202VMMR3DECL(void) PDMR3ResetCpu(PVMCPU pVCpu)
1203{
1204 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_APIC);
1205 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_PIC);
1206 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_NMI);
1207 VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_INTERRUPT_SMI);
1208}
1209
1210
1211/**
1212 * This function will notify all the devices and their attached drivers about
1213 * the VM now being reset.
1214 *
1215 * @param pVM VM Handle.
1216 */
1217VMMR3DECL(void) PDMR3Reset(PVM pVM)
1218{
1219 LogFlow(("PDMR3Reset:\n"));
1220
1221 /*
1222 * Clear all the reset flags.
1223 */
1224 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
1225 {
1226 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_RESET;
1227 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
1228 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1229 pDrvIns->Internal.s.fVMReset = false;
1230 }
1231#ifdef VBOX_WITH_USB
1232 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns; pUsbIns = pUsbIns->Internal.s.pNext)
1233 {
1234 pUsbIns->Internal.s.fVMReset = false;
1235 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun; pLun = pLun->pNext)
1236 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1237 pDrvIns->Internal.s.fVMReset = false;
1238 }
1239#endif
1240
1241 /*
1242 * The outer loop repeats until there are no more async requests.
1243 */
1244 unsigned cAsync;
1245 for (unsigned iLoop = 0; ; iLoop++)
1246 {
1247 /*
1248 * Iterate thru the device instances and USB device instances,
1249 * processing the drivers associated with those.
1250 */
1251 cAsync = 0;
1252 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
1253 {
1254 unsigned const cAsyncStart = cAsync;
1255
1256 if (cAsync == cAsyncStart)
1257 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
1258 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1259 if (!pdmR3ResetDrv(pDrvIns, &cAsync, pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun))
1260 break;
1261
1262 if (cAsync == cAsyncStart)
1263 pdmR3ResetDev(pDevIns, &cAsync);
1264 }
1265
1266#ifdef VBOX_WITH_USB
1267 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns; pUsbIns = pUsbIns->Internal.s.pNext)
1268 {
1269 unsigned const cAsyncStart = cAsync;
1270
1271 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun; pLun = pLun->pNext)
1272 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1273 if (!pdmR3ResetDrv(pDrvIns, &cAsync, pUsbIns->pReg->szName, pUsbIns->iInstance, pLun->iLun))
1274 break;
1275
1276 if (cAsync == cAsyncStart)
1277 pdmR3ResetUsb(pUsbIns, &cAsync);
1278 }
1279#endif
1280 if (!cAsync)
1281 break;
1282
1283 /*
1284 * Process requests.
1285 */
1286 /** @todo This is utterly nuts and completely unsafe... will get back to it in a
1287 * bit I hope... */
1288 int rc = VMR3AsyncPdmNotificationWaitU(&pVM->pUVM->aCpus[0]);
1289 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1290 rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY);
1291 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1292 rc = VMR3ReqProcessU(pVM->pUVM, 0/*idDstCpu*/);
1293 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1294 }
1295
1296 /*
1297 * Clear all pending interrupts and DMA operations.
1298 */
1299 for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
1300 PDMR3ResetCpu(&pVM->aCpus[idCpu]);
1301 VM_FF_CLEAR(pVM, VM_FF_PDM_DMA);
1302
1303 LogFlow(("PDMR3Reset: returns void\n"));
1304}
1305
1306
1307/**
1308 * Worker for PDMR3Suspend that deals with one driver.
1309 *
1310 * @param pDrvIns The driver instance.
1311 * @param pcAsync The asynchronous suspend notification counter.
1312 * @param pszDeviceName The parent device name.
1313 * @param iDevInstance The parent device instance number.
1314 * @param iLun The parent LUN number.
1315 */
1316DECLINLINE(bool) pdmR3SuspendDrv(PPDMDRVINS pDrvIns, unsigned *pcAsync,
1317 const char *pszDeviceName, uint32_t iDevInstance, uint32_t iLun)
1318{
1319 if (!pDrvIns->Internal.s.fVMSuspended)
1320 {
1321 pDrvIns->Internal.s.fVMSuspended = true;
1322 if (pDrvIns->pReg->pfnSuspend)
1323 {
1324 if (!pDrvIns->Internal.s.pfnAsyncNotify)
1325 {
1326 LogFlow(("PDMR3Suspend: Notifying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1327 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1328 pDrvIns->pReg->pfnSuspend(pDrvIns);
1329 if (pDrvIns->Internal.s.pfnAsyncNotify)
1330 LogFlow(("PDMR3Suspend: Async notification started - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1331 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1332 }
1333 else if (pDrvIns->Internal.s.pfnAsyncNotify(pDrvIns))
1334 {
1335 pDrvIns->Internal.s.pfnAsyncNotify = false;
1336 LogFlow(("PDMR3Suspend: Async notification completed - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1337 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1338 }
1339 if (pDrvIns->Internal.s.pfnAsyncNotify)
1340 {
1341 pDrvIns->Internal.s.fVMSuspended = false;
1342 (*pcAsync)++;
1343 return false;
1344 }
1345 }
1346 }
1347 return true;
1348}
1349
1350
1351/**
1352 * Worker for PDMR3Suspend that deals with one USB device instance.
1353 *
1354 * @param pUsbIns The USB device instance.
1355 * @param pcAsync The asynchronous suspend notification counter.
1356 */
1357DECLINLINE(void) pdmR3SuspendUsb(PPDMUSBINS pUsbIns, unsigned *pcAsync)
1358{
1359 if (!pUsbIns->Internal.s.fVMSuspended)
1360 {
1361 pUsbIns->Internal.s.fVMSuspended = true;
1362 if (pUsbIns->pReg->pfnVMSuspend)
1363 {
1364 if (!pUsbIns->Internal.s.pfnAsyncNotify)
1365 {
1366 LogFlow(("PDMR3Suspend: Notifying - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1367 pUsbIns->pReg->pfnVMSuspend(pUsbIns);
1368 if (pUsbIns->Internal.s.pfnAsyncNotify)
1369 LogFlow(("PDMR3Suspend: Async notification started - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1370 }
1371 else if (pUsbIns->Internal.s.pfnAsyncNotify(pUsbIns))
1372 {
1373 LogFlow(("PDMR3Suspend: Async notification completed - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1374 pUsbIns->Internal.s.pfnAsyncNotify = NULL;
1375 }
1376 if (pUsbIns->Internal.s.pfnAsyncNotify)
1377 {
1378 pUsbIns->Internal.s.fVMSuspended = false;
1379 (*pcAsync)++;
1380 }
1381 }
1382 }
1383}
1384
1385
1386/**
1387 * Worker for PDMR3Suspend that deals with one device instance.
1388 *
1389 * @param pDevIns The device instance.
1390 * @param pcAsync The asynchronous suspend notification counter.
1391 */
1392DECLINLINE(void) pdmR3SuspendDev(PPDMDEVINS pDevIns, unsigned *pcAsync)
1393{
1394 if (!(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_SUSPENDED))
1395 {
1396 pDevIns->Internal.s.fIntFlags |= PDMDEVINSINT_FLAGS_SUSPENDED;
1397 if (pDevIns->pReg->pfnSuspend)
1398 {
1399 if (!pDevIns->Internal.s.pfnAsyncNotify)
1400 {
1401 LogFlow(("PDMR3Suspend: Notifying - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1402 pDevIns->pReg->pfnSuspend(pDevIns);
1403 if (pDevIns->Internal.s.pfnAsyncNotify)
1404 LogFlow(("PDMR3Suspend: Async notification started - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1405 }
1406 else if (pDevIns->Internal.s.pfnAsyncNotify(pDevIns))
1407 {
1408 LogFlow(("PDMR3Suspend: Async notification completed - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1409 pDevIns->Internal.s.pfnAsyncNotify = NULL;
1410 }
1411 if (pDevIns->Internal.s.pfnAsyncNotify)
1412 {
1413 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_SUSPENDED;
1414 (*pcAsync)++;
1415 }
1416 }
1417 }
1418}
1419
1420
1421/**
1422 * This function will notify all the devices and their attached drivers about
1423 * the VM now being suspended.
1424 *
1425 * @param pVM The VM Handle.
1426 * @thread EMT(0)
1427 */
1428VMMR3DECL(void) PDMR3Suspend(PVM pVM)
1429{
1430 LogFlow(("PDMR3Suspend:\n"));
1431 VM_ASSERT_EMT0(pVM);
1432
1433 /*
1434 * The outer loop repeats until there are no more async requests.
1435 *
1436 * Note! We depend on the suspended indicators to be in the desired state
1437 * and we do not reset them before starting because this allows
1438 * PDMR3PowerOn and PDMR3Resume to use PDMR3Suspend for cleaning up
1439 * on failure.
1440 */
1441 unsigned cAsync;
1442 for (unsigned iLoop = 0; ; iLoop++)
1443 {
1444 /*
1445 * Iterate thru the device instances and USB device instances,
1446 * processing the drivers associated with those.
1447 *
1448 * The attached drivers are normally processed first. Some devices
1449 * (like DevAHCI) though needs to be notified before the drivers so
1450 * that it doesn't kick off any new requests after the drivers stopped
1451 * taking any. (DrvVD changes to read-only in this particular case.)
1452 */
1453 cAsync = 0;
1454 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
1455 {
1456 unsigned const cAsyncStart = cAsync;
1457
1458 if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_FIRST_SUSPEND_NOTIFICATION)
1459 pdmR3SuspendDev(pDevIns, &cAsync);
1460
1461 if (cAsync == cAsyncStart)
1462 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
1463 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1464 if (!pdmR3SuspendDrv(pDrvIns, &cAsync, pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun))
1465 break;
1466
1467 if ( cAsync == cAsyncStart
1468 && !(pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_FIRST_SUSPEND_NOTIFICATION))
1469 pdmR3SuspendDev(pDevIns, &cAsync);
1470 }
1471
1472#ifdef VBOX_WITH_USB
1473 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns; pUsbIns = pUsbIns->Internal.s.pNext)
1474 {
1475 unsigned const cAsyncStart = cAsync;
1476
1477 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun; pLun = pLun->pNext)
1478 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1479 if (!pdmR3SuspendDrv(pDrvIns, &cAsync, pUsbIns->pReg->szName, pUsbIns->iInstance, pLun->iLun))
1480 break;
1481
1482 if (cAsync == cAsyncStart)
1483 pdmR3SuspendUsb(pUsbIns, &cAsync);
1484 }
1485#endif
1486 if (!cAsync)
1487 break;
1488
1489 /*
1490 * Process requests.
1491 */
1492 /** @todo This is utterly nuts and completely unsafe... will get back to it in a
1493 * bit I hope... */
1494 int rc = VMR3AsyncPdmNotificationWaitU(&pVM->pUVM->aCpus[0]);
1495 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1496 rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY);
1497 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1498 rc = VMR3ReqProcessU(pVM->pUVM, 0/*idDstCpu*/);
1499 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1500 }
1501
1502 /*
1503 * Suspend all threads.
1504 */
1505 pdmR3ThreadSuspendAll(pVM);
1506
1507 LogFlow(("PDMR3Suspend: returns void\n"));
1508}
1509
1510
1511/**
1512 * Worker for PDMR3Resume that deals with one driver.
1513 *
1514 * @param pDrvIns The driver instance.
1515 * @param pszDeviceName The parent device name.
1516 * @param iDevInstance The parent device instance number.
1517 * @param iLun The parent LUN number.
1518 */
1519DECLINLINE(int) pdmR3ResumeDrv(PPDMDRVINS pDrvIns, const char *pszDeviceName, uint32_t iDevInstance, uint32_t iLun)
1520{
1521 Assert(pDrvIns->Internal.s.fVMSuspended);
1522 if (pDrvIns->pReg->pfnResume)
1523 {
1524 LogFlow(("PDMR3Resume: Notifying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1525 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1526 int rc = VINF_SUCCESS; pDrvIns->pReg->pfnResume(pDrvIns);
1527 if (RT_FAILURE(rc))
1528 {
1529 LogRel(("PDMR3Resume: driver '%s'/%d on LUN#%d of device '%s'/%d -> %Rrc\n",
1530 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance, rc));
1531 return rc;
1532 }
1533 }
1534 pDrvIns->Internal.s.fVMSuspended = false;
1535 return VINF_SUCCESS;
1536}
1537
1538
1539/**
1540 * Worker for PDMR3Resume that deals with one USB device instance.
1541 *
1542 * @returns VBox status code.
1543 * @param pUsbIns The USB device instance.
1544 */
1545DECLINLINE(int) pdmR3ResumeUsb(PPDMUSBINS pUsbIns)
1546{
1547 Assert(pUsbIns->Internal.s.fVMSuspended);
1548 if (pUsbIns->pReg->pfnVMResume)
1549 {
1550 LogFlow(("PDMR3Resume: Notifying - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1551 int rc = VINF_SUCCESS; pUsbIns->pReg->pfnVMResume(pUsbIns);
1552 if (RT_FAILURE(rc))
1553 {
1554 LogRel(("PDMR3Resume: device '%s'/%d -> %Rrc\n", pUsbIns->pReg->szName, pUsbIns->iInstance, rc));
1555 return rc;
1556 }
1557 }
1558 pUsbIns->Internal.s.fVMSuspended = false;
1559 return VINF_SUCCESS;
1560}
1561
1562
1563/**
1564 * Worker for PDMR3Resume that deals with one device instance.
1565 *
1566 * @returns VBox status code.
1567 * @param pDevIns The device instance.
1568 */
1569DECLINLINE(int) pdmR3ResumeDev(PPDMDEVINS pDevIns)
1570{
1571 Assert(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_SUSPENDED);
1572 if (pDevIns->pReg->pfnResume)
1573 {
1574 LogFlow(("PDMR3Resume: Notifying - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1575 int rc = VINF_SUCCESS; pDevIns->pReg->pfnResume(pDevIns);
1576 if (RT_FAILURE(rc))
1577 {
1578 LogRel(("PDMR3Resume: device '%s'/%d -> %Rrc\n", pDevIns->pReg->szName, pDevIns->iInstance, rc));
1579 return rc;
1580 }
1581 }
1582 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_SUSPENDED;
1583 return VINF_SUCCESS;
1584}
1585
1586
1587/**
1588 * This function will notify all the devices and their
1589 * attached drivers about the VM now being resumed.
1590 *
1591 * @param pVM VM Handle.
1592 */
1593VMMR3DECL(void) PDMR3Resume(PVM pVM)
1594{
1595 LogFlow(("PDMR3Resume:\n"));
1596
1597 /*
1598 * Iterate thru the device instances and USB device instances,
1599 * processing the drivers associated with those.
1600 */
1601 int rc = VINF_SUCCESS;
1602 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns && RT_SUCCESS(rc); pDevIns = pDevIns->Internal.s.pNextR3)
1603 {
1604 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun && RT_SUCCESS(rc); pLun = pLun->pNext)
1605 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns && RT_SUCCESS(rc); pDrvIns = pDrvIns->Internal.s.pDown)
1606 rc = pdmR3ResumeDrv(pDrvIns, pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun);
1607 if (RT_SUCCESS(rc))
1608 rc = pdmR3ResumeDev(pDevIns);
1609 }
1610
1611#ifdef VBOX_WITH_USB
1612 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns && RT_SUCCESS(rc); pUsbIns = pUsbIns->Internal.s.pNext)
1613 {
1614 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun && RT_SUCCESS(rc); pLun = pLun->pNext)
1615 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns && RT_SUCCESS(rc); pDrvIns = pDrvIns->Internal.s.pDown)
1616 rc = pdmR3ResumeDrv(pDrvIns, pUsbIns->pReg->szName, pUsbIns->iInstance, pLun->iLun);
1617 if (RT_SUCCESS(rc))
1618 rc = pdmR3ResumeUsb(pUsbIns);
1619 }
1620#endif
1621
1622 /*
1623 * Resume all threads.
1624 */
1625 if (RT_SUCCESS(rc))
1626 pdmR3ThreadResumeAll(pVM);
1627
1628 /*
1629 * Resume the block cache.
1630 */
1631 if (RT_SUCCESS(rc))
1632 pdmR3BlkCacheResume(pVM);
1633
1634 /*
1635 * On failure, clean up via PDMR3Suspend.
1636 */
1637 if (RT_FAILURE(rc))
1638 PDMR3Suspend(pVM);
1639
1640 LogFlow(("PDMR3Resume: returns %Rrc\n", rc));
1641 return /*rc*/;
1642}
1643
1644
1645/**
1646 * Worker for PDMR3PowerOff that deals with one driver.
1647 *
1648 * @param pDrvIns The driver instance.
1649 * @param pcAsync The asynchronous power off notification counter.
1650 * @param pszDeviceName The parent device name.
1651 * @param iDevInstance The parent device instance number.
1652 * @param iLun The parent LUN number.
1653 */
1654DECLINLINE(bool) pdmR3PowerOffDrv(PPDMDRVINS pDrvIns, unsigned *pcAsync,
1655 const char *pszDeviceName, uint32_t iDevInstance, uint32_t iLun)
1656{
1657 if (!pDrvIns->Internal.s.fVMSuspended)
1658 {
1659 pDrvIns->Internal.s.fVMSuspended = true;
1660 if (pDrvIns->pReg->pfnPowerOff)
1661 {
1662 if (!pDrvIns->Internal.s.pfnAsyncNotify)
1663 {
1664 LogFlow(("PDMR3PowerOff: Notifying - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1665 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1666 pDrvIns->pReg->pfnPowerOff(pDrvIns);
1667 if (pDrvIns->Internal.s.pfnAsyncNotify)
1668 LogFlow(("PDMR3PowerOff: Async notification started - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1669 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1670 }
1671 else if (pDrvIns->Internal.s.pfnAsyncNotify(pDrvIns))
1672 {
1673 pDrvIns->Internal.s.pfnAsyncNotify = false;
1674 LogFlow(("PDMR3PowerOff: Async notification completed - driver '%s'/%d on LUN#%d of device '%s'/%d\n",
1675 pDrvIns->pReg->szName, pDrvIns->iInstance, iLun, pszDeviceName, iDevInstance));
1676 }
1677 if (pDrvIns->Internal.s.pfnAsyncNotify)
1678 {
1679 pDrvIns->Internal.s.fVMSuspended = false;
1680 (*pcAsync)++;
1681 return false;
1682 }
1683 }
1684 }
1685 return true;
1686}
1687
1688
1689/**
1690 * Worker for PDMR3PowerOff that deals with one USB device instance.
1691 *
1692 * @param pUsbIns The USB device instance.
1693 * @param pcAsync The asynchronous power off notification counter.
1694 */
1695DECLINLINE(void) pdmR3PowerOffUsb(PPDMUSBINS pUsbIns, unsigned *pcAsync)
1696{
1697 if (!pUsbIns->Internal.s.fVMSuspended)
1698 {
1699 pUsbIns->Internal.s.fVMSuspended = true;
1700 if (pUsbIns->pReg->pfnVMPowerOff)
1701 {
1702 if (!pUsbIns->Internal.s.pfnAsyncNotify)
1703 {
1704 LogFlow(("PDMR3PowerOff: Notifying - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1705 pUsbIns->pReg->pfnVMPowerOff(pUsbIns);
1706 if (pUsbIns->Internal.s.pfnAsyncNotify)
1707 LogFlow(("PDMR3PowerOff: Async notification started - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1708 }
1709 else if (pUsbIns->Internal.s.pfnAsyncNotify(pUsbIns))
1710 {
1711 LogFlow(("PDMR3PowerOff: Async notification completed - device '%s'/%d\n", pUsbIns->pReg->szName, pUsbIns->iInstance));
1712 pUsbIns->Internal.s.pfnAsyncNotify = NULL;
1713 }
1714 if (pUsbIns->Internal.s.pfnAsyncNotify)
1715 {
1716 pUsbIns->Internal.s.fVMSuspended = false;
1717 (*pcAsync)++;
1718 }
1719 }
1720 }
1721}
1722
1723
1724/**
1725 * Worker for PDMR3PowerOff that deals with one device instance.
1726 *
1727 * @param pDevIns The device instance.
1728 * @param pcAsync The asynchronous power off notification counter.
1729 */
1730DECLINLINE(void) pdmR3PowerOffDev(PPDMDEVINS pDevIns, unsigned *pcAsync)
1731{
1732 if (!(pDevIns->Internal.s.fIntFlags & PDMDEVINSINT_FLAGS_SUSPENDED))
1733 {
1734 pDevIns->Internal.s.fIntFlags |= PDMDEVINSINT_FLAGS_SUSPENDED;
1735 if (pDevIns->pReg->pfnPowerOff)
1736 {
1737 if (!pDevIns->Internal.s.pfnAsyncNotify)
1738 {
1739 LogFlow(("PDMR3PowerOff: Notifying - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1740 pDevIns->pReg->pfnPowerOff(pDevIns);
1741 if (pDevIns->Internal.s.pfnAsyncNotify)
1742 LogFlow(("PDMR3PowerOff: Async notification started - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1743 }
1744 else if (pDevIns->Internal.s.pfnAsyncNotify(pDevIns))
1745 {
1746 LogFlow(("PDMR3PowerOff: Async notification completed - device '%s'/%d\n", pDevIns->pReg->szName, pDevIns->iInstance));
1747 pDevIns->Internal.s.pfnAsyncNotify = NULL;
1748 }
1749 if (pDevIns->Internal.s.pfnAsyncNotify)
1750 {
1751 pDevIns->Internal.s.fIntFlags &= ~PDMDEVINSINT_FLAGS_SUSPENDED;
1752 (*pcAsync)++;
1753 }
1754 }
1755 }
1756}
1757
1758
1759/**
1760 * This function will notify all the devices and their
1761 * attached drivers about the VM being powered off.
1762 *
1763 * @param pVM VM Handle.
1764 */
1765VMMR3DECL(void) PDMR3PowerOff(PVM pVM)
1766{
1767 LogFlow(("PDMR3PowerOff:\n"));
1768
1769 /*
1770 * The outer loop repeats until there are no more async requests.
1771 */
1772 unsigned cAsync;
1773 for (unsigned iLoop = 0; ; iLoop++)
1774 {
1775 /*
1776 * Iterate thru the device instances and USB device instances,
1777 * processing the drivers associated with those.
1778 *
1779 * The attached drivers are normally processed first. Some devices
1780 * (like DevAHCI) though needs to be notified before the drivers so
1781 * that it doesn't kick off any new requests after the drivers stopped
1782 * taking any. (DrvVD changes to read-only in this particular case.)
1783 */
1784 cAsync = 0;
1785 for (PPDMDEVINS pDevIns = pVM->pdm.s.pDevInstances; pDevIns; pDevIns = pDevIns->Internal.s.pNextR3)
1786 {
1787 unsigned const cAsyncStart = cAsync;
1788
1789 if (pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_FIRST_POWEROFF_NOTIFICATION)
1790 pdmR3PowerOffDev(pDevIns, &cAsync);
1791
1792 if (cAsync == cAsyncStart)
1793 for (PPDMLUN pLun = pDevIns->Internal.s.pLunsR3; pLun; pLun = pLun->pNext)
1794 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1795 if (!pdmR3PowerOffDrv(pDrvIns, &cAsync, pDevIns->pReg->szName, pDevIns->iInstance, pLun->iLun))
1796 break;
1797
1798 if ( cAsync == cAsyncStart
1799 && !(pDevIns->pReg->fFlags & PDM_DEVREG_FLAGS_FIRST_POWEROFF_NOTIFICATION))
1800 pdmR3PowerOffDev(pDevIns, &cAsync);
1801 }
1802
1803#ifdef VBOX_WITH_USB
1804 for (PPDMUSBINS pUsbIns = pVM->pdm.s.pUsbInstances; pUsbIns; pUsbIns = pUsbIns->Internal.s.pNext)
1805 {
1806 unsigned const cAsyncStart = cAsync;
1807
1808 for (PPDMLUN pLun = pUsbIns->Internal.s.pLuns; pLun; pLun = pLun->pNext)
1809 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
1810 if (!pdmR3PowerOffDrv(pDrvIns, &cAsync, pUsbIns->pReg->szName, pUsbIns->iInstance, pLun->iLun))
1811 break;
1812
1813 if (cAsync == cAsyncStart)
1814 pdmR3PowerOffUsb(pUsbIns, &cAsync);
1815 }
1816#endif
1817 if (!cAsync)
1818 break;
1819
1820 /*
1821 * Process requests.
1822 */
1823 /** @todo This is utterly nuts and completely unsafe... will get back to it in a
1824 * bit I hope... */
1825 int rc = VMR3AsyncPdmNotificationWaitU(&pVM->pUVM->aCpus[0]);
1826 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1827 rc = VMR3ReqProcessU(pVM->pUVM, VMCPUID_ANY);
1828 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1829 rc = VMR3ReqProcessU(pVM->pUVM, 0/*idDstCpu*/);
1830 AssertReleaseMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc));
1831 }
1832
1833 /*
1834 * Suspend all threads.
1835 */
1836 pdmR3ThreadSuspendAll(pVM);
1837
1838 LogFlow(("PDMR3PowerOff: returns void\n"));
1839}
1840
1841
1842/**
1843 * Queries the base interface of a device instance.
1844 *
1845 * The caller can use this to query other interfaces the device implements
1846 * and use them to talk to the device.
1847 *
1848 * @returns VBox status code.
1849 * @param pVM VM handle.
1850 * @param pszDevice Device name.
1851 * @param iInstance Device instance.
1852 * @param ppBase Where to store the pointer to the base device interface on success.
1853 * @remark We're not doing any locking ATM, so don't try call this at times when the
1854 * device chain is known to be updated.
1855 */
1856VMMR3DECL(int) PDMR3QueryDevice(PVM pVM, const char *pszDevice, unsigned iInstance, PPDMIBASE *ppBase)
1857{
1858 LogFlow(("PDMR3DeviceQuery: pszDevice=%p:{%s} iInstance=%u ppBase=%p\n", pszDevice, pszDevice, iInstance, ppBase));
1859
1860 /*
1861 * Iterate registered devices looking for the device.
1862 */
1863 size_t cchDevice = strlen(pszDevice);
1864 for (PPDMDEV pDev = pVM->pdm.s.pDevs; pDev; pDev = pDev->pNext)
1865 {
1866 if ( pDev->cchName == cchDevice
1867 && !memcmp(pDev->pReg->szName, pszDevice, cchDevice))
1868 {
1869 /*
1870 * Iterate device instances.
1871 */
1872 for (PPDMDEVINS pDevIns = pDev->pInstances; pDevIns; pDevIns = pDevIns->Internal.s.pPerDeviceNextR3)
1873 {
1874 if (pDevIns->iInstance == iInstance)
1875 {
1876 if (pDevIns->IBase.pfnQueryInterface)
1877 {
1878 *ppBase = &pDevIns->IBase;
1879 LogFlow(("PDMR3DeviceQuery: return VINF_SUCCESS and *ppBase=%p\n", *ppBase));
1880 return VINF_SUCCESS;
1881 }
1882
1883 LogFlow(("PDMR3DeviceQuery: returns VERR_PDM_DEVICE_INSTANCE_NO_IBASE\n"));
1884 return VERR_PDM_DEVICE_INSTANCE_NO_IBASE;
1885 }
1886 }
1887
1888 LogFlow(("PDMR3DeviceQuery: returns VERR_PDM_DEVICE_INSTANCE_NOT_FOUND\n"));
1889 return VERR_PDM_DEVICE_INSTANCE_NOT_FOUND;
1890 }
1891 }
1892
1893 LogFlow(("PDMR3QueryDevice: returns VERR_PDM_DEVICE_NOT_FOUND\n"));
1894 return VERR_PDM_DEVICE_NOT_FOUND;
1895}
1896
1897
1898/**
1899 * Queries the base interface of a device LUN.
1900 *
1901 * This differs from PDMR3QueryLun by that it returns the interface on the
1902 * device and not the top level driver.
1903 *
1904 * @returns VBox status code.
1905 * @param pVM VM Handle.
1906 * @param pszDevice Device name.
1907 * @param iInstance Device instance.
1908 * @param iLun The Logical Unit to obtain the interface of.
1909 * @param ppBase Where to store the base interface pointer.
1910 * @remark We're not doing any locking ATM, so don't try call this at times when the
1911 * device chain is known to be updated.
1912 */
1913VMMR3DECL(int) PDMR3QueryDeviceLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPDMIBASE *ppBase)
1914{
1915 LogFlow(("PDMR3QueryLun: pszDevice=%p:{%s} iInstance=%u iLun=%u ppBase=%p\n",
1916 pszDevice, pszDevice, iInstance, iLun, ppBase));
1917
1918 /*
1919 * Find the LUN.
1920 */
1921 PPDMLUN pLun;
1922 int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
1923 if (RT_SUCCESS(rc))
1924 {
1925 *ppBase = pLun->pBase;
1926 LogFlow(("PDMR3QueryDeviceLun: return VINF_SUCCESS and *ppBase=%p\n", *ppBase));
1927 return VINF_SUCCESS;
1928 }
1929 LogFlow(("PDMR3QueryDeviceLun: returns %Rrc\n", rc));
1930 return rc;
1931}
1932
1933
1934/**
1935 * Query the interface of the top level driver on a LUN.
1936 *
1937 * @returns VBox status code.
1938 * @param pVM VM Handle.
1939 * @param pszDevice Device name.
1940 * @param iInstance Device instance.
1941 * @param iLun The Logical Unit to obtain the interface of.
1942 * @param ppBase Where to store the base interface pointer.
1943 * @remark We're not doing any locking ATM, so don't try call this at times when the
1944 * device chain is known to be updated.
1945 */
1946VMMR3DECL(int) PDMR3QueryLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, PPDMIBASE *ppBase)
1947{
1948 LogFlow(("PDMR3QueryLun: pszDevice=%p:{%s} iInstance=%u iLun=%u ppBase=%p\n",
1949 pszDevice, pszDevice, iInstance, iLun, ppBase));
1950
1951 /*
1952 * Find the LUN.
1953 */
1954 PPDMLUN pLun;
1955 int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
1956 if (RT_SUCCESS(rc))
1957 {
1958 if (pLun->pTop)
1959 {
1960 *ppBase = &pLun->pTop->IBase;
1961 LogFlow(("PDMR3QueryLun: return %Rrc and *ppBase=%p\n", VINF_SUCCESS, *ppBase));
1962 return VINF_SUCCESS;
1963 }
1964 rc = VERR_PDM_NO_DRIVER_ATTACHED_TO_LUN;
1965 }
1966 LogFlow(("PDMR3QueryLun: returns %Rrc\n", rc));
1967 return rc;
1968}
1969
1970
1971/**
1972 * Query the interface of a named driver on a LUN.
1973 *
1974 * If the driver appears more than once in the driver chain, the first instance
1975 * is returned.
1976 *
1977 * @returns VBox status code.
1978 * @param pVM VM Handle.
1979 * @param pszDevice Device name.
1980 * @param iInstance Device instance.
1981 * @param iLun The Logical Unit to obtain the interface of.
1982 * @param pszDriver The driver name.
1983 * @param ppBase Where to store the base interface pointer.
1984 *
1985 * @remark We're not doing any locking ATM, so don't try call this at times when the
1986 * device chain is known to be updated.
1987 */
1988VMMR3DECL(int) PDMR3QueryDriverOnLun(PVM pVM, const char *pszDevice, unsigned iInstance, unsigned iLun, const char *pszDriver, PPPDMIBASE ppBase)
1989{
1990 LogFlow(("PDMR3QueryDriverOnLun: pszDevice=%p:{%s} iInstance=%u iLun=%u pszDriver=%p:{%s} ppBase=%p\n",
1991 pszDevice, pszDevice, iInstance, iLun, pszDriver, pszDriver, ppBase));
1992
1993 /*
1994 * Find the LUN.
1995 */
1996 PPDMLUN pLun;
1997 int rc = pdmR3DevFindLun(pVM, pszDevice, iInstance, iLun, &pLun);
1998 if (RT_SUCCESS(rc))
1999 {
2000 if (pLun->pTop)
2001 {
2002 for (PPDMDRVINS pDrvIns = pLun->pTop; pDrvIns; pDrvIns = pDrvIns->Internal.s.pDown)
2003 if (!strcmp(pDrvIns->pReg->szName, pszDriver))
2004 {
2005 *ppBase = &pDrvIns->IBase;
2006 LogFlow(("PDMR3QueryDriverOnLun: return %Rrc and *ppBase=%p\n", VINF_SUCCESS, *ppBase));
2007 return VINF_SUCCESS;
2008
2009 }
2010 rc = VERR_PDM_DRIVER_NOT_FOUND;
2011 }
2012 else
2013 rc = VERR_PDM_NO_DRIVER_ATTACHED_TO_LUN;
2014 }
2015 LogFlow(("PDMR3QueryDriverOnLun: returns %Rrc\n", rc));
2016 return rc;
2017}
2018
2019/**
2020 * Executes pending DMA transfers.
2021 * Forced Action handler.
2022 *
2023 * @param pVM VM handle.
2024 */
2025VMMR3DECL(void) PDMR3DmaRun(PVM pVM)
2026{
2027 /* Note! Not really SMP safe; restrict it to VCPU 0. */
2028 if (VMMGetCpuId(pVM) != 0)
2029 return;
2030
2031 if (VM_FF_TESTANDCLEAR(pVM, VM_FF_PDM_DMA))
2032 {
2033 if (pVM->pdm.s.pDmac)
2034 {
2035 bool fMore = pVM->pdm.s.pDmac->Reg.pfnRun(pVM->pdm.s.pDmac->pDevIns);
2036 if (fMore)
2037 VM_FF_SET(pVM, VM_FF_PDM_DMA);
2038 }
2039 }
2040}
2041
2042
2043/**
2044 * Service a VMMCALLRING3_PDM_LOCK call.
2045 *
2046 * @returns VBox status code.
2047 * @param pVM The VM handle.
2048 */
2049VMMR3DECL(int) PDMR3LockCall(PVM pVM)
2050{
2051 return PDMR3CritSectEnterEx(&pVM->pdm.s.CritSect, true /* fHostCall */);
2052}
2053
2054
2055/**
2056 * Registers the VMM device heap
2057 *
2058 * @returns VBox status code.
2059 * @param pVM VM handle.
2060 * @param GCPhys The physical address.
2061 * @param pvHeap Ring-3 pointer.
2062 * @param cbSize Size of the heap.
2063 */
2064VMMR3DECL(int) PDMR3RegisterVMMDevHeap(PVM pVM, RTGCPHYS GCPhys, RTR3PTR pvHeap, unsigned cbSize)
2065{
2066 Assert(pVM->pdm.s.pvVMMDevHeap == NULL);
2067
2068 Log(("PDMR3RegisterVMMDevHeap %RGp %RHv %x\n", GCPhys, pvHeap, cbSize));
2069 pVM->pdm.s.pvVMMDevHeap = pvHeap;
2070 pVM->pdm.s.GCPhysVMMDevHeap = GCPhys;
2071 pVM->pdm.s.cbVMMDevHeap = cbSize;
2072 pVM->pdm.s.cbVMMDevHeapLeft = cbSize;
2073 return VINF_SUCCESS;
2074}
2075
2076
2077/**
2078 * Unregisters the VMM device heap
2079 *
2080 * @returns VBox status code.
2081 * @param pVM VM handle.
2082 * @param GCPhys The physical address.
2083 */
2084VMMR3DECL(int) PDMR3UnregisterVMMDevHeap(PVM pVM, RTGCPHYS GCPhys)
2085{
2086 Assert(pVM->pdm.s.GCPhysVMMDevHeap == GCPhys);
2087
2088 Log(("PDMR3UnregisterVMMDevHeap %RGp\n", GCPhys));
2089 pVM->pdm.s.pvVMMDevHeap = NULL;
2090 pVM->pdm.s.GCPhysVMMDevHeap = NIL_RTGCPHYS;
2091 pVM->pdm.s.cbVMMDevHeap = 0;
2092 pVM->pdm.s.cbVMMDevHeapLeft = 0;
2093 return VINF_SUCCESS;
2094}
2095
2096
2097/**
2098 * Allocates memory from the VMM device heap
2099 *
2100 * @returns VBox status code.
2101 * @param pVM VM handle.
2102 * @param cbSize Allocation size.
2103 * @param pv Ring-3 pointer. (out)
2104 */
2105VMMR3DECL(int) PDMR3VMMDevHeapAlloc(PVM pVM, unsigned cbSize, RTR3PTR *ppv)
2106{
2107#ifdef DEBUG_bird
2108 if (!cbSize || cbSize > pVM->pdm.s.cbVMMDevHeapLeft)
2109 return VERR_NO_MEMORY;
2110#else
2111 AssertReturn(cbSize && cbSize <= pVM->pdm.s.cbVMMDevHeapLeft, VERR_NO_MEMORY);
2112#endif
2113
2114 Log(("PDMR3VMMDevHeapAlloc %x\n", cbSize));
2115
2116 /** @todo not a real heap as there's currently only one user. */
2117 *ppv = pVM->pdm.s.pvVMMDevHeap;
2118 pVM->pdm.s.cbVMMDevHeapLeft = 0;
2119 return VINF_SUCCESS;
2120}
2121
2122
2123/**
2124 * Frees memory from the VMM device heap
2125 *
2126 * @returns VBox status code.
2127 * @param pVM VM handle.
2128 * @param pv Ring-3 pointer.
2129 */
2130VMMR3DECL(int) PDMR3VMMDevHeapFree(PVM pVM, RTR3PTR pv)
2131{
2132 Log(("PDMR3VMMDevHeapFree %RHv\n", pv));
2133
2134 /** @todo not a real heap as there's currently only one user. */
2135 pVM->pdm.s.cbVMMDevHeapLeft = pVM->pdm.s.cbVMMDevHeap;
2136 return VINF_SUCCESS;
2137}
2138
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