VBoxAcpi.cpp@ 108143

Last change on this file since 108143 was 108143, checked in by vboxsync, 11 days ago
Devices/PC/DevACPI: Create the CPU hotplug variant SSDT on the fly and remove the static variant which got patched accordingly, bugref:10733
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 19.1 KB

Line
1	/* $Id: VBoxAcpi.cpp 108143 2025-02-10 14:44:27Z vboxsync $ */
2	/** @file
3	* VBoxAcpi - VirtualBox ACPI manipulation functionality.
4	*/
5
6	/*
7	* Copyright (C) 2009-2024 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#include <iprt/cdefs.h>
33	#if !defined(IN_RING3)
34	# error Pure R3 code
35	#endif
36
37	#define LOG_GROUP LOG_GROUP_DEV_ACPI
38	#include <VBox/vmm/pdmdev.h>
39	#include <VBox/vmm/pgm.h>
40	#include <VBox/log.h>
41	#include <VBox/param.h>
42	#include <VBox/vmm/cfgm.h>
43	#include <VBox/vmm/mm.h>
44	#include <iprt/acpi.h>
45	#include <iprt/assert.h>
46	#include <iprt/alloc.h>
47	#include <iprt/buildconfig.h>
48	#include <iprt/string.h>
49	#include <iprt/file.h>
50
51	/* Statically compiled AML */
52	#include <vboxaml.hex>
53	#ifdef VBOX_WITH_TPM
54	# include <vboxssdt_tpm.hex>
55	#endif
56
57	#include "VBoxDD.h"
58
59	/** The CPU suffixes being used for processor object names. */
60	static const char g_achCpuSuff[] = "0123456789ABCDEFGHIJKLMNOPQRSTUV";
61
62	/**
63	* Creates the SSDT exposing configured CPUs as processor objects.
64	*
65	* @returns VBox status code.
66	* @param pDevIns The PDM device instance data.
67	* @param ppabAml Where to store the pointer to the buffer containing the ACPI table on success.
68	* @param pcbAml Where to store the size of the ACPI table in bytes on success.
69	*
70	* @note This replaces the old vbox-standard.dsl which was patched accordingly.
71	*/
72	static int acpiCreateCpuSsdt(PPDMDEVINS pDevIns, uint8_t *ppabAml, size_t pcbAml)
73	{
74	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
75
76	uint16_t cCpus;
77	int rc = pHlp->pfnCFGMQueryU16Def(pDevIns->pCfg, "NumCPUs", &cCpus, 1);
78	if (RT_FAILURE(rc))
79	return rc;
80
81	bool fShowCpu;
82	rc = pHlp->pfnCFGMQueryBoolDef(pDevIns->pCfg, "ShowCpu", &fShowCpu, false);
83	if (RT_FAILURE(rc))
84	return rc;
85
86	/* Don't expose any CPU object if we are not required to. */
87	if (!fShowCpu)
88	cCpus = 0;
89
90	RTACPITBL hAcpiTbl;
91	rc = RTAcpiTblCreate(&hAcpiTbl, ACPI_TABLE_HDR_SIGNATURE_SSDT, 1, "VBOX ", "VBOXCPUT", 2, "VBOX", RTBldCfgRevision());
92	if (RT_SUCCESS(rc))
93	{
94	RTAcpiTblScopeStart(hAcpiTbl, "\\_PR");
95	for (uint16_t i = 0; i < cCpus; i++)
96	{
97	uint8_t const cCpuSuff = RT_ELEMENTS(g_achCpuSuff);
98	RTAcpiTblProcessorStartF(hAcpiTbl, i /bProcId/, 0 /u32PBlkAddr/, 0 /cbPBlk/, "CP%c%c",
99	i < cCpuSuff ? 'U' : 'V',
100	g_achCpuSuff[i % cCpuSuff]);
101	rc = RTAcpiTblProcessorFinalize(hAcpiTbl);
102	if (RT_FAILURE(rc))
103	break;
104	}
105	RTAcpiTblScopeFinalize(hAcpiTbl);
106
107	rc = RTAcpiTblFinalize(hAcpiTbl);
108	if (RT_SUCCESS(rc))
109	{
110	rc = RTAcpiTblDumpToBufferA(hAcpiTbl, RTACPITBLTYPE_AML, ppabAml, pcbAml);
111	if (RT_FAILURE(rc))
112	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to dump CPU SSDT"));
113	}
114	else
115	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to finalize CPU SSDT"));
116
117	RTAcpiTblDestroy(hAcpiTbl);
118	}
119	else
120	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to create CPU SSDT"));
121
122	return rc;
123	}
124
125
126	/**
127	* Creates the SSDT exposing configured CPUs as processor objects - hotplug variant.
128	*
129	* @returns VBox status code.
130	* @param pDevIns The PDM device instance data.
131	* @param ppabAml Where to store the pointer to the buffer containing the ACPI table on success.
132	* @param pcbAml Where to store the size of the ACPI table in bytes on success.
133	*
134	* @note This replaces the old vbox-cpuhotplug.dsl which was patched accordingly.
135	*/
136	static int acpiCreateCpuHotplugSsdt(PPDMDEVINS pDevIns, uint8_t *ppabAml, size_t pcbAml)
137	{
138	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
139
140	uint16_t cCpus;
141	int rc = pHlp->pfnCFGMQueryU16Def(pDevIns->pCfg, "NumCPUs", &cCpus, 1);
142	if (RT_FAILURE(rc))
143	return rc;
144
145	RTACPITBL hAcpiTbl;
146	rc = RTAcpiTblCreate(&hAcpiTbl, ACPI_TABLE_HDR_SIGNATURE_SSDT, 1, "VBOX ", "VBOXCPUT", 2, "VBOX", RTBldCfgRevision());
147	if (RT_SUCCESS(rc))
148	{
149	uint8_t const cCpuSuff = RT_ELEMENTS(g_achCpuSuff);
150
151	/* Declare externals */
152	RTAcpiTblIfStart(hAcpiTbl);
153	RTAcpiTblIntegerAppend(hAcpiTbl, 0);
154
155	RTAcpiTblExternalAppend(hAcpiTbl, "CPUC", kAcpiObjType_Unknown, 0 /cArgs/);
156	RTAcpiTblExternalAppend(hAcpiTbl, "CPUL", kAcpiObjType_Unknown, 0 /cArgs/);
157	RTAcpiTblExternalAppend(hAcpiTbl, "CPEV", kAcpiObjType_Unknown, 0 /cArgs/);
158	RTAcpiTblExternalAppend(hAcpiTbl, "CPET", kAcpiObjType_Unknown, 0 /cArgs/);
159
160	RTAcpiTblIfFinalize(hAcpiTbl);
161
162	/* Define two helper methods. */
163
164	/* CPCK(Arg0) -> Boolean - Checks whether the CPU identified by the given indes is locked. */
165	RTAcpiTblMethodStart(hAcpiTbl, "CPCK", 1 /cArgs/, RTACPI_METHOD_F_NOT_SERIALIZED, 0 /uSyncLvl/);
166	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Store);
167	RTAcpiTblArgOpAppend(hAcpiTbl, 0);
168	RTAcpiTblNameStringAppend(hAcpiTbl, "CPUC");
169
170	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Return);
171	RTAcpiTblBinaryOpAppend(hAcpiTbl, kAcpiBinaryOp_LEqual);
172	RTAcpiTblNameStringAppend(hAcpiTbl, "CPUL");
173	RTAcpiTblIntegerAppend(hAcpiTbl, 1);
174	RTAcpiTblMethodFinalize(hAcpiTbl);
175
176	/* CPLO(Arg0) -> Nothing - Unlocks the CPU identified by the given index. */
177	RTAcpiTblMethodStart(hAcpiTbl, "CPLO", 1 /cArgs/, RTACPI_METHOD_F_NOT_SERIALIZED, 0 /uSyncLvl/);
178	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Store);
179	RTAcpiTblArgOpAppend(hAcpiTbl, 0);
180	RTAcpiTblNameStringAppend(hAcpiTbl, "CPUL");
181	RTAcpiTblMethodFinalize(hAcpiTbl);
182
183	/* Define all configured CPUs. */
184	RTAcpiTblScopeStart(hAcpiTbl, "\\_SB");
185	for (uint16_t i = 0; i < cCpus; i++)
186	{
187	RTAcpiTblDeviceStartF(hAcpiTbl, "SC%c%c", i < cCpuSuff ? 'K' : 'L', g_achCpuSuff[i % cCpuSuff]);
188
189	RTAcpiTblNameAppend(hAcpiTbl, "_HID");
190	RTAcpiTblStringAppend(hAcpiTbl, "ACPI0004");
191	RTAcpiTblNameAppend(hAcpiTbl, "_UID");
192	RTAcpiTblStringAppendF(hAcpiTbl, "SCKCP%c%c", i < cCpuSuff ? 'U' : 'V', g_achCpuSuff[i % cCpuSuff]);
193
194	RTAcpiTblProcessorStartF(hAcpiTbl, i /bProcId/, 0 /u32PBlkAddr/, 0 /cbPBlk/, "CP%c%c",
195	i < cCpuSuff ? 'U' : 'V',
196	g_achCpuSuff[i % cCpuSuff]);
197
198	RTAcpiTblNameAppend(hAcpiTbl, "_HID");
199	RTAcpiTblStringAppend(hAcpiTbl, "ACPI0007");
200	RTAcpiTblNameAppend(hAcpiTbl, "_UID");
201	RTAcpiTblIntegerAppend(hAcpiTbl, i);
202	RTAcpiTblNameAppend(hAcpiTbl, "_PXM");
203	RTAcpiTblIntegerAppend(hAcpiTbl, 0);
204
205	uint8_t abBufApic[8] = { 0x00, 0x08, (uint8_t)i, (uint8_t)i, 0, 0, 0, 0};
206	RTAcpiTblNameAppend(hAcpiTbl, "APIC");
207	RTAcpiTblBufferAppend(hAcpiTbl, &abBufApic[0], sizeof(abBufApic));
208
209	/* _MAT Method. */
210	RTAcpiTblMethodStart(hAcpiTbl, "_MAT", 0 /cArgs/, RTACPI_METHOD_F_SERIALIZED, 0 /uSyncLvl/);
211	RTAcpiTblIfStart(hAcpiTbl);
212	RTAcpiTblNameStringAppend(hAcpiTbl, "CPCK");
213	RTAcpiTblIntegerAppend(hAcpiTbl, i);
214
215	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Store);
216	RTAcpiTblIntegerAppend(hAcpiTbl, 1);
217	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Index);
218	RTAcpiTblNameStringAppend(hAcpiTbl, "APIC");
219	RTAcpiTblIntegerAppend(hAcpiTbl, 4);
220	RTAcpiTblNullNameAppend(hAcpiTbl);
221
222	RTAcpiTblIfFinalize(hAcpiTbl);
223	RTAcpiTblElseStart(hAcpiTbl);
224	RTAcpiTblElseFinalize(hAcpiTbl);
225
226	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Return);
227	RTAcpiTblNameStringAppend(hAcpiTbl, "APIC");
228	RTAcpiTblMethodFinalize(hAcpiTbl);
229
230	/* _STA Method. */
231	RTAcpiTblMethodStart(hAcpiTbl, "_STA", 0 /cArgs/, RTACPI_METHOD_F_NOT_SERIALIZED, 0 /uSyncLvl/);
232	RTAcpiTblIfStart(hAcpiTbl);
233	RTAcpiTblNameStringAppend(hAcpiTbl, "CPCK");
234	RTAcpiTblIntegerAppend(hAcpiTbl, i);
235
236	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Return);
237	RTAcpiTblIntegerAppend(hAcpiTbl, 0xf);
238	RTAcpiTblIfFinalize(hAcpiTbl);
239	RTAcpiTblElseStart(hAcpiTbl);
240	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Return);
241	RTAcpiTblIntegerAppend(hAcpiTbl, 0x0);
242	RTAcpiTblElseFinalize(hAcpiTbl);
243	RTAcpiTblMethodFinalize(hAcpiTbl);
244
245	/* _EJ0 Method. */
246	RTAcpiTblMethodStart(hAcpiTbl, "_EJ0", 1 /cArgs/, RTACPI_METHOD_F_NOT_SERIALIZED, 0 /uSyncLvl/);
247	RTAcpiTblNameStringAppend(hAcpiTbl, "CPLO");
248	RTAcpiTblIntegerAppend(hAcpiTbl, i);
249	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Return);
250	RTAcpiTblMethodFinalize(hAcpiTbl);
251
252	RTAcpiTblProcessorFinalize(hAcpiTbl);
253
254	rc = RTAcpiTblDeviceFinalize(hAcpiTbl);
255	if (RT_FAILURE(rc))
256	break;
257	}
258
259	if (RT_SUCCESS(rc))
260	{
261	RTAcpiTblScopeFinalize(hAcpiTbl);
262
263	/* Now the _GPE scope where event processing takes place. */
264	RTAcpiTblScopeStart(hAcpiTbl, "\\_GPE");
265	RTAcpiTblMethodStart(hAcpiTbl, "_L01", 0 /cArgs/, RTACPI_METHOD_F_NOT_SERIALIZED, 0 /uSyncLvl/);
266
267	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Store);
268	RTAcpiTblNameStringAppend(hAcpiTbl, "CPEV");
269	RTAcpiTblLocalOpAppend(hAcpiTbl, 0);
270
271	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Store);
272	RTAcpiTblNameStringAppend(hAcpiTbl, "CPET");
273	RTAcpiTblLocalOpAppend(hAcpiTbl, 1);
274
275	for (uint16_t i = 0; i < cCpus; i++)
276	{
277	RTAcpiTblIfStart(hAcpiTbl);
278	RTAcpiTblBinaryOpAppend(hAcpiTbl, kAcpiBinaryOp_LEqual);
279	RTAcpiTblLocalOpAppend(hAcpiTbl, 0);
280	RTAcpiTblIntegerAppend(hAcpiTbl, i);
281
282	RTAcpiTblStmtSimpleAppend(hAcpiTbl, kAcpiStmt_Notify);
283	RTAcpiTblNameStringAppendF(hAcpiTbl, "\\_SB.SC%c%c.CP%c%c",
284	i < cCpuSuff ? 'K' : 'L',
285	g_achCpuSuff[i % cCpuSuff],
286	i < cCpuSuff ? 'U' : 'V',
287	g_achCpuSuff[i % cCpuSuff]);
288	RTAcpiTblLocalOpAppend(hAcpiTbl, 1);
289	rc = RTAcpiTblIfFinalize(hAcpiTbl);
290	if (RT_FAILURE(rc))
291	break;
292	}
293
294	RTAcpiTblMethodFinalize(hAcpiTbl);
295	RTAcpiTblScopeFinalize(hAcpiTbl);
296	}
297
298	rc = RTAcpiTblFinalize(hAcpiTbl);
299	if (RT_SUCCESS(rc))
300	{
301	rc = RTAcpiTblDumpToBufferA(hAcpiTbl, RTACPITBLTYPE_AML, ppabAml, pcbAml);
302	if (RT_FAILURE(rc))
303	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to dump CPU SSDT"));
304	}
305	else
306	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to finalize CPU SSDT"));
307
308	RTAcpiTblDestroy(hAcpiTbl);
309	}
310	else
311	rc = PDMDEV_SET_ERROR(pDevIns, rc, N_("ACPI error: Failed to create CPU SSDT"));
312
313	return rc;
314	}
315
316
317	/**
318	* Loads an AML file if present in CFGM
319	*
320	* @returns VBox status code
321	* @param pDevIns The device instance
322	* @param pcszCfgName The configuration key holding the file path
323	* @param pcszSignature The signature to check for
324	* @param ppabAmlCode Where to store the pointer to the AML code on success.
325	* @param pcbAmlCode Where to store the number of bytes of the AML code on success.
326	*/
327	static int acpiAmlLoadExternal(PPDMDEVINS pDevIns, const char pcszCfgName, const char pcszSignature,
328	uint8_t *ppabAmlCode, size_t pcbAmlCode)
329	{
330	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
331
332	char *pszAmlFilePath = NULL;
333	int rc = pHlp->pfnCFGMQueryStringAlloc(pDevIns->pCfg, pcszCfgName, &pszAmlFilePath);
334	if (RT_SUCCESS(rc))
335	{
336	/* Load from file. */
337	RTFILE hFileAml = NIL_RTFILE;
338	rc = RTFileOpen(&hFileAml, pszAmlFilePath, RTFILE_O_OPEN \| RTFILE_O_READ \| RTFILE_O_DENY_NONE);
339	if (RT_SUCCESS(rc))
340	{
341	/*
342	* An AML file contains the raw DSDT or SSDT thus the size of the file
343	* is equal to the size of the DSDT or SSDT.
344	*/
345	uint64_t cbAmlFile = 0;
346	rc = RTFileQuerySize(hFileAml, &cbAmlFile);
347
348	/* Don't use AML files over 32MiB. */
349	if ( RT_SUCCESS(rc)
350	&& cbAmlFile <= _32M)
351	{
352	size_t const cbAmlCode = (size_t)cbAmlFile;
353	uint8_t pabAmlCode = (uint8_t )RTMemAllocZ(cbAmlCode);
354	if (pabAmlCode)
355	{
356	rc = RTFileReadAt(hFileAml, 0, pabAmlCode, cbAmlCode, NULL);
357
358	/*
359	* We fail if reading failed or the identifier at the
360	* beginning is wrong.
361	*/
362	if ( RT_FAILURE(rc)
363	\|\| strncmp((const char *)pabAmlCode, pcszSignature, 4))
364	{
365	RTMemFree(pabAmlCode);
366	pabAmlCode = NULL;
367
368	/* Return error if file header check failed */
369	if (RT_SUCCESS(rc))
370	rc = VERR_PARSE_ERROR;
371	}
372	else
373	{
374	*ppabAmlCode = pabAmlCode;
375	*pcbAmlCode = cbAmlCode;
376	rc = VINF_SUCCESS;
377	}
378	}
379	else
380	rc = VERR_NO_MEMORY;
381	}
382	else if (RT_SUCCESS(rc))
383	rc = VERR_OUT_OF_RANGE;
384
385	RTFileClose(hFileAml);
386	}
387	PDMDevHlpMMHeapFree(pDevIns, pszAmlFilePath);
388	}
389
390	return rc;
391	}
392
393
394	/** No docs, lazy coder. */
395	int acpiPrepareDsdt(PPDMDEVINS pDevIns, void *ppvPtr, size_t pcbDsdt)
396	{
397	uint8_t *pabAmlCodeDsdt = NULL;
398	size_t cbAmlCodeDsdt = 0;
399	int rc = acpiAmlLoadExternal(pDevIns, "DsdtFilePath", "DSDT", &pabAmlCodeDsdt, &cbAmlCodeDsdt);
400	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
401	{
402	/* Use the compiled in AML code */
403	cbAmlCodeDsdt = sizeof(AmlCode);
404	pabAmlCodeDsdt = (uint8_t *)RTMemDup(AmlCode, cbAmlCodeDsdt);
405	if (pabAmlCodeDsdt)
406	rc = VINF_SUCCESS;
407	else
408	rc = VERR_NO_MEMORY;
409	}
410	else if (RT_FAILURE(rc))
411	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to read \"DsdtFilePath\""));
412
413	if (RT_SUCCESS(rc))
414	{
415	*ppvPtr = pabAmlCodeDsdt;
416	*pcbDsdt = cbAmlCodeDsdt;
417	}
418	return rc;
419	}
420
421	/** No docs, lazy coder. */
422	int acpiCleanupDsdt(PPDMDEVINS pDevIns, void *pvPtr)
423	{
424	RT_NOREF1(pDevIns);
425	if (pvPtr)
426	RTMemFree(pvPtr);
427	return VINF_SUCCESS;
428	}
429
430	/** No docs, lazy coder. */
431	int acpiPrepareSsdt(PPDMDEVINS pDevIns, void *ppvPtr, size_t pcbSsdt)
432	{
433	PCPDMDEVHLPR3 pHlp = pDevIns->pHlpR3;
434
435	uint8_t *pabAmlCodeSsdt = NULL;
436	size_t cbAmlCodeSsdt = 0;
437	int rc = acpiAmlLoadExternal(pDevIns, "SsdtFilePath", "SSDT", &pabAmlCodeSsdt, &cbAmlCodeSsdt);
438	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
439	{
440	bool fCpuHotPlug = false;
441	rc = pHlp->pfnCFGMQueryBoolDef(pDevIns->pCfg, "CpuHotPlug", &fCpuHotPlug, false);
442	if (RT_SUCCESS(rc))
443	{
444	if (fCpuHotPlug)
445	rc = acpiCreateCpuHotplugSsdt(pDevIns, &pabAmlCodeSsdt, &cbAmlCodeSsdt);
446	else
447	rc = acpiCreateCpuSsdt(pDevIns, &pabAmlCodeSsdt, &cbAmlCodeSsdt);
448	}
449	}
450	else if (RT_FAILURE(rc))
451	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to read \"SsdtFilePath\""));
452
453	if (RT_SUCCESS(rc))
454	{
455	*ppvPtr = pabAmlCodeSsdt;
456	*pcbSsdt = cbAmlCodeSsdt;
457	}
458	return rc;
459	}
460
461	/** No docs, lazy coder. */
462	int acpiCleanupSsdt(PPDMDEVINS pDevIns, void *pvPtr)
463	{
464	RT_NOREF1(pDevIns);
465	if (pvPtr)
466	RTMemFree(pvPtr);
467	return VINF_SUCCESS;
468	}
469
470	#ifdef VBOX_WITH_TPM
471	/** No docs, lazy coder. */
472	int acpiPrepareTpmSsdt(PPDMDEVINS pDevIns, void *ppvPtr, size_t pcbSsdt)
473	{
474	uint8_t *pabAmlCodeSsdt = NULL;
475	size_t cbAmlCodeSsdt = 0;
476	int rc = acpiAmlLoadExternal(pDevIns, "SsdtTpmFilePath", "SSDT", &pabAmlCodeSsdt, &cbAmlCodeSsdt);
477	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
478	{
479	rc = VINF_SUCCESS;
480	cbAmlCodeSsdt = sizeof(AmlCodeSsdtTpm);
481	pabAmlCodeSsdt = (uint8_t *)RTMemDup(AmlCodeSsdtTpm, sizeof(AmlCodeSsdtTpm));
482	if (!pabAmlCodeSsdt)
483	rc = VERR_NO_MEMORY;
484	}
485	else if (RT_FAILURE(rc))
486	return PDMDEV_SET_ERROR(pDevIns, rc, N_("Configuration error: Failed to read \"SsdtFilePath\""));
487
488	if (RT_SUCCESS(rc))
489	{
490	*ppvPtr = pabAmlCodeSsdt;
491	*pcbSsdt = cbAmlCodeSsdt;
492	}
493	return rc;
494	}
495
496	/** No docs, lazy coder. */
497	int acpiCleanupTpmSsdt(PPDMDEVINS pDevIns, void *pvPtr)
498	{
499	RT_NOREF1(pDevIns);
500	if (pvPtr)
501	RTMemFree(pvPtr);
502	return VINF_SUCCESS;
503	}
504	#endif
505

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source: vbox/trunk/src/VBox/Devices/PC/ACPI/VBoxAcpi.cpp@ 108143

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