VMMGC.cpp@ 2981

Last change on this file since 2981 was 2981, checked in by vboxsync, 17 years ago
InnoTek -> innotek: all the headers and comments.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 9.9 KB

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1	/* $Id: VMMGC.cpp 2981 2007-06-01 16:01:28Z vboxsync $ */
2	/** @file
3	* VMM - Guest Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_VMM
27	#include <VBox/vmm.h>
28	#include <VBox/trpm.h>
29	#include "VMMInternal.h"
30	#include <VBox/vm.h>
31	#include <VBox/sup.h>
32	#include <VBox/err.h>
33	#include <VBox/log.h>
34	#include <iprt/asm.h>
35	#include <iprt/assert.h>
36
37
38	/*******************************************************************************
39	* Global Variables *
40	*******************************************************************************/
41	/** Default logger instance. */
42	extern "C" DECLIMPORT(RTLOGGERGC) g_Logger;
43	extern "C" DECLIMPORT(RTLOGGERGC) g_RelLogger;
44
45
46	/*******************************************************************************
47	* Internal Functions *
48	*******************************************************************************/
49	static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg);
50	static DECLCALLBACK(int) vmmGCTestTmpPFHandler(PVM pVM, PCPUMCTXCORE pRegFrame);
51	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame);
52
53
54
55	/**
56	* The GC entry point.
57	*
58	* @returns VBox status code.
59	* @param pVM The VM to operate on.
60	* @param uOperation Which operation to execute (VMMGCOPERATION).
61	* @param uArg Argument to that operation.
62	*/
63	VMMGCDECL(int) VMMGCEntry(PVM pVM, unsigned uOperation, unsigned uArg)
64	{
65	/* todo */
66	switch (uOperation)
67	{
68	/*
69	* Init GC modules.
70	*/
71	case VMMGC_DO_VMMGC_INIT:
72	{
73	Log(("VMMGCEntry: VMMGC_DO_VMMGC_INIT - uArg=%#x\n", uArg));
74	/** @todo validate version. */
75	return VINF_SUCCESS;
76	}
77
78	/*
79	* Testcase which is used to test interrupt forwarding.
80	* It spins for a while with interrupts enabled.
81	*/
82	case VMMGC_DO_TESTCASE_HYPER_INTERRUPT:
83	{
84	uint32_t volatile i = 0;
85	ASMIntEnable();
86	while (i < _2G32)
87	i++;
88	ASMIntDisable();
89	return 0;
90	}
91
92	/*
93	* Testcase which simply returns, this is used for
94	* profiling of the switcher.
95	*/
96	case VMMGC_DO_TESTCASE_NOP:
97	return 0;
98
99	/*
100	* Testcase executes a privileged instruction to force a world switch. (in both SVM & VMX)
101	*/
102	case VMMGC_DO_TESTCASE_HWACCM_NOP:
103	ASMRdMsr_Low(MSR_IA32_SYSENTER_CS);
104	return 0;
105
106	/*
107	* Delay for ~100us.
108	*/
109	case VMMGC_DO_TESTCASE_INTERRUPT_MASKING:
110	{
111	uint64_t u64MaxTicks = (SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) != ~(uint64_t)0
112	? SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage)
113	: _2G)
114	/ 10000;
115	uint64_t u64StartTSC = ASMReadTSC();
116	uint64_t u64TicksNow;
117	uint32_t volatile i = 0;
118
119	do
120	{
121	/* waste some time and protect against getting stuck. */
122	for (uint32_t volatile j = 0; j < 1000; j++, i++)
123	if (i > _2G32)
124	return VERR_GENERAL_FAILURE;
125
126	/* check if we're done.*/
127	u64TicksNow = ASMReadTSC() - u64StartTSC;
128	} while (u64TicksNow < u64MaxTicks);
129
130	return VINF_SUCCESS;
131	}
132
133	/*
134	* Trap testcases and unknown operations.
135	*/
136	default:
137	if ( uOperation >= VMMGC_DO_TESTCASE_TRAP_FIRST
138	&& uOperation < VMMGC_DO_TESTCASE_TRAP_LAST)
139	return vmmGCTest(pVM, uOperation, uArg);
140	return VERR_INVALID_PARAMETER;
141	}
142	}
143
144
145	/**
146	* Internal GC logger worker: Flush logger.
147	*
148	* @returns VINF_SUCCESS.
149	* @param pLogger The logger instance to flush.
150	* @remark This function must be exported!
151	*/
152	VMMGCDECL(int) vmmGCLoggerFlush(PRTLOGGERGC pLogger)
153	{
154	PVM pVM = &g_VM;
155	NOREF(pLogger);
156	return VMMGCCallHost(pVM, VMMCALLHOST_VMM_LOGGER_FLUSH, 0);
157	}
158
159
160	/**
161	* Switches from guest context to host context.
162	*
163	* @param pVM The VM handle.
164	* @param rc The status code.
165	*/
166	VMMGCDECL(void) VMMGCGuestToHost(PVM pVM, int rc)
167	{
168	pVM->vmm.s.pfnGCGuestToHost(rc);
169	}
170
171
172	/**
173	* Calls the ring-3 host code.
174	*
175	* @returns VBox status code of the ring-3 call.
176	* @param pVM The VM handle.
177	* @param enmOperation The operation.
178	* @param uArg The argument to the operation.
179	*/
180	VMMGCDECL(int) VMMGCCallHost(PVM pVM, VMMCALLHOST enmOperation, uint64_t uArg)
181	{
182	/** @todo profile this! */
183	pVM->vmm.s.enmCallHostOperation = enmOperation;
184	pVM->vmm.s.u64CallHostArg = uArg;
185	pVM->vmm.s.rcCallHost = VERR_INTERNAL_ERROR;
186	pVM->vmm.s.pfnGCGuestToHost(VINF_VMM_CALL_HOST);
187	return pVM->vmm.s.rcCallHost;
188	}
189
190
191	/**
192	* Execute the trap testcase.
193	*
194	* There is some common code here, that's why we're collecting them
195	* like this. Odd numbered variation (uArg) are executed with write
196	* protection (WP) enabled.
197	*
198	* @returns VINF_SUCCESS if it was a testcase setup up to continue and did so successfully.
199	* @returns VERR_NOT_IMPLEMENTED if the testcase wasn't implemented.
200	* @returns VERR_GENERAL_FAILURE if the testcase continued when it shouldn't.
201	*
202	* @param pVM The VM handle.
203	* @param uOperation The testcase.
204	* @param uArg The variation. See function description for odd / even details.
205	*
206	* @remark Careful with the trap 08 testcase and WP, it will tripple
207	* fault the box if the TSS, the Trap8 TSS and the fault TSS
208	* GDTE are in pages which are read-only.
209	* See bottom of SELMR3Init().
210	*/
211	static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg)
212	{
213	/*
214	* Set up the testcase.
215	*/
216	#if 0
217	switch (uOperation)
218	{
219	default:
220	break;
221	}
222	#endif
223
224	/*
225	* Enable WP if odd variation.
226	*/
227	if (uArg & 1)
228	vmmGCEnableWP();
229
230	/*
231	* Execute the testcase.
232	*/
233	int rc = VERR_NOT_IMPLEMENTED;
234	switch (uOperation)
235	{
236	//case VMMGC_DO_TESTCASE_TRAP_0:
237	//case VMMGC_DO_TESTCASE_TRAP_1:
238	//case VMMGC_DO_TESTCASE_TRAP_2:
239
240	case VMMGC_DO_TESTCASE_TRAP_3:
241	{
242	if (uArg <= 1)
243	rc = vmmGCTestTrap3();
244	break;
245	}
246
247	//case VMMGC_DO_TESTCASE_TRAP_4:
248	//case VMMGC_DO_TESTCASE_TRAP_5:
249	//case VMMGC_DO_TESTCASE_TRAP_6:
250	//case VMMGC_DO_TESTCASE_TRAP_7:
251
252	case VMMGC_DO_TESTCASE_TRAP_8:
253	{
254	#ifndef DEBUG_bird /** @todo dynamic check that this won't tripple fault... */
255	if (uArg & 1)
256	break;
257	#endif
258	if (uArg <= 1)
259	rc = vmmGCTestTrap8();
260	break;
261	}
262
263	//VMMGC_DO_TESTCASE_TRAP_9,
264	//VMMGC_DO_TESTCASE_TRAP_0A,
265	//VMMGC_DO_TESTCASE_TRAP_0B,
266	//VMMGC_DO_TESTCASE_TRAP_0C,
267
268	case VMMGC_DO_TESTCASE_TRAP_0D:
269	{
270	if (uArg <= 1)
271	rc = vmmGCTestTrap0d();
272	break;
273	}
274
275	case VMMGC_DO_TESTCASE_TRAP_0E:
276	{
277	if (uArg <= 1)
278	rc = vmmGCTestTrap0e();
279	else if (uArg == 2 \|\| uArg == 4)
280	{
281	/*
282	* Test the use of a temporary #PF handler.
283	*/
284	rc = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, uArg != 4 ? vmmGCTestTmpPFHandler : vmmGCTestTmpPFHandlerCorruptFS);
285	if (VBOX_SUCCESS(rc))
286	{
287	rc = vmmGCTestTrap0e();
288
289	/* in case it didn't fire. */
290	int rc2 = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, NULL);
291	if (VBOX_FAILURE(rc2) && VBOX_SUCCESS(rc))
292	rc = rc2;
293	}
294	}
295	break;
296	}
297	}
298
299	/*
300	* Re-enable WP.
301	*/
302	if (uArg & 1)
303	vmmGCDisableWP();
304
305	return rc;
306	}
307
308
309	/**
310	* Temporary #PF trap handler for the #PF test case.
311	*
312	* @returns VBox status code (appropriate for GC return).
313	* In this context VBOX_SUCCESS means to restart the instruction.
314	* @param pVM VM handle.
315	* @param pRegFrame Trap register frame.
316	*/
317	static DECLCALLBACK(int) vmmGCTestTmpPFHandler(PVM pVM, PCPUMCTXCORE pRegFrame)
318	{
319	if (pRegFrame->eip == (uintptr_t)vmmGCTestTrap0e_FaultEIP)
320	{
321	pRegFrame->eip = (uintptr_t)vmmGCTestTrap0e_ResumeEIP;
322	return VINF_SUCCESS;
323	}
324	return VERR_INTERNAL_ERROR;
325	}
326
327
328	/**
329	* Temporary #PF trap handler for the #PF test case, this one messes up the fs selector.
330	*
331	* @returns VBox status code (appropriate for GC return).
332	* In this context VBOX_SUCCESS means to restart the instruction.
333	* @param pVM VM handle.
334	* @param pRegFrame Trap register frame.
335	*/
336	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame)
337	{
338	int rc = vmmGCTestTmpPFHandler(pVM, pRegFrame);
339	pRegFrame->fs = 0x30;
340	return rc;
341	}
342

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source: vbox/trunk/src/VBox/VMM/VMMGC/VMMGC.cpp@ 2981

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