VMMGC.cpp@ 29561

Last change on this file since 29561 was 29250, checked in by vboxsync, 15 years ago
iprt/asm.h: split out asm-math.h, don't include asm-.h from asm.h, don't include asm.h from sup.h. Fixed a couple file headers.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 10.4 KB

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1	/* $Id: VMMGC.cpp 29250 2010-05-09 17:53:58Z vboxsync $ */
2	/** @file
3	* VMM - Raw-mode Context.
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	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_VMM
23	#include <iprt/asm-amd64-x86.h> /* for SUPGetCpuHzFromGIP */
24	#include <VBox/vmm.h>
25	#include <VBox/trpm.h>
26	#include <VBox/pgm.h>
27	#include "VMMInternal.h"
28	#include <VBox/vm.h>
29	#include <VBox/sup.h>
30	#include <VBox/err.h>
31	#include <VBox/log.h>
32	#include <iprt/assert.h>
33	#include <iprt/initterm.h>
34
35
36	/*******************************************************************************
37	* Global Variables *
38	*******************************************************************************/
39	/** Default logger instance. */
40	extern "C" DECLIMPORT(RTLOGGERRC) g_Logger;
41	extern "C" DECLIMPORT(RTLOGGERRC) g_RelLogger;
42
43
44	/*******************************************************************************
45	* Internal Functions *
46	*******************************************************************************/
47	static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg);
48	static DECLCALLBACK(int) vmmGCTestTmpPFHandler(PVM pVM, PCPUMCTXCORE pRegFrame);
49	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame);
50
51
52
53	/**
54	* The GC entry point.
55	*
56	* @returns VBox status code.
57	* @param pVM The VM to operate on.
58	* @param uOperation Which operation to execute (VMMGCOPERATION).
59	* @param uArg Argument to that operation.
60	*/
61	VMMRCDECL(int) VMMGCEntry(PVM pVM, unsigned uOperation, unsigned uArg, ...)
62	{
63	/* todo */
64	switch (uOperation)
65	{
66	/*
67	* Init RC modules.
68	*/
69	case VMMGC_DO_VMMGC_INIT:
70	{
71	/*
72	* Validate the svn revision (uArg).
73	*/
74	if (uArg != VMMGetSvnRev())
75	return VERR_VERSION_MISMATCH;
76
77	/*
78	* Initialize the runtime.
79	* (The program timestamp is found in the elipsis.)
80	*/
81	va_list va;
82	va_start(va, uArg);
83	uint64_t u64TS = va_arg(va, uint64_t);
84	va_end(va);
85
86	int rc = RTRCInit(u64TS);
87	Log(("VMMGCEntry: VMMGC_DO_VMMGC_INIT - uArg=%u (svn revision) u64TS=%RX64; rc=%Rrc\n", uArg, u64TS, rc));
88	AssertRCReturn(rc, rc);
89
90	rc = PGMRegisterStringFormatTypes();
91	AssertRCReturn(rc, rc);
92
93	return VINF_SUCCESS;
94	}
95
96	/*
97	* Testcase which is used to test interrupt forwarding.
98	* It spins for a while with interrupts enabled.
99	*/
100	case VMMGC_DO_TESTCASE_HYPER_INTERRUPT:
101	{
102	uint32_t volatile i = 0;
103	ASMIntEnable();
104	while (i < _2G32)
105	i++;
106	ASMIntDisable();
107	return 0;
108	}
109
110	/*
111	* Testcase which simply returns, this is used for
112	* profiling of the switcher.
113	*/
114	case VMMGC_DO_TESTCASE_NOP:
115	return 0;
116
117	/*
118	* Testcase executes a privileged instruction to force a world switch. (in both SVM & VMX)
119	*/
120	case VMMGC_DO_TESTCASE_HWACCM_NOP:
121	ASMRdMsr_Low(MSR_IA32_SYSENTER_CS);
122	return 0;
123
124	/*
125	* Delay for ~100us.
126	*/
127	case VMMGC_DO_TESTCASE_INTERRUPT_MASKING:
128	{
129	uint64_t u64MaxTicks = (SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) != ~(uint64_t)0
130	? SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage)
131	: _2G)
132	/ 10000;
133	uint64_t u64StartTSC = ASMReadTSC();
134	uint64_t u64TicksNow;
135	uint32_t volatile i = 0;
136
137	do
138	{
139	/* waste some time and protect against getting stuck. */
140	for (uint32_t volatile j = 0; j < 1000; j++, i++)
141	if (i > _2G32)
142	return VERR_GENERAL_FAILURE;
143
144	/* check if we're done.*/
145	u64TicksNow = ASMReadTSC() - u64StartTSC;
146	} while (u64TicksNow < u64MaxTicks);
147
148	return VINF_SUCCESS;
149	}
150
151	/*
152	* Trap testcases and unknown operations.
153	*/
154	default:
155	if ( uOperation >= VMMGC_DO_TESTCASE_TRAP_FIRST
156	&& uOperation < VMMGC_DO_TESTCASE_TRAP_LAST)
157	return vmmGCTest(pVM, uOperation, uArg);
158	return VERR_INVALID_PARAMETER;
159	}
160	}
161
162
163	/**
164	* Internal RC logger worker: Flush logger.
165	*
166	* @returns VINF_SUCCESS.
167	* @param pLogger The logger instance to flush.
168	* @remark This function must be exported!
169	*/
170	VMMRCDECL(int) vmmGCLoggerFlush(PRTLOGGERRC pLogger)
171	{
172	PVM pVM = &g_VM;
173	NOREF(pLogger);
174	if (pVM->vmm.s.fRCLoggerFlushingDisabled)
175	return VINF_SUCCESS; /* fail quietly. */
176	return VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VMM_LOGGER_FLUSH, 0);
177	}
178
179
180	/**
181	* Flush logger if almost full.
182	*
183	* @param pVM The VM handle.
184	*/
185	VMMRCDECL(void) VMMGCLogFlushIfFull(PVM pVM)
186	{
187	if ( pVM->vmm.s.pRCLoggerRC
188	&& pVM->vmm.s.pRCLoggerRC->offScratch >= (sizeof(pVM->vmm.s.pRCLoggerRC->achScratch)*3/4))
189	{
190	if (pVM->vmm.s.fRCLoggerFlushingDisabled)
191	return; /* fail quietly. */
192	VMMRZCallRing3NoCpu(pVM, VMMCALLRING3_VMM_LOGGER_FLUSH, 0);
193	}
194	}
195
196
197	/**
198	* Switches from guest context to host context.
199	*
200	* @param pVM The VM handle.
201	* @param rc The status code.
202	*/
203	VMMRCDECL(void) VMMGCGuestToHost(PVM pVM, int rc)
204	{
205	pVM->vmm.s.pfnGuestToHostRC(rc);
206	}
207
208
209	/**
210	* Execute the trap testcase.
211	*
212	* There is some common code here, that's why we're collecting them
213	* like this. Odd numbered variation (uArg) are executed with write
214	* protection (WP) enabled.
215	*
216	* @returns VINF_SUCCESS if it was a testcase setup up to continue and did so successfully.
217	* @returns VERR_NOT_IMPLEMENTED if the testcase wasn't implemented.
218	* @returns VERR_GENERAL_FAILURE if the testcase continued when it shouldn't.
219	*
220	* @param pVM The VM handle.
221	* @param uOperation The testcase.
222	* @param uArg The variation. See function description for odd / even details.
223	*
224	* @remark Careful with the trap 08 testcase and WP, it will tripple
225	* fault the box if the TSS, the Trap8 TSS and the fault TSS
226	* GDTE are in pages which are read-only.
227	* See bottom of SELMR3Init().
228	*/
229	static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg)
230	{
231	/*
232	* Set up the testcase.
233	*/
234	#if 0
235	switch (uOperation)
236	{
237	default:
238	break;
239	}
240	#endif
241
242	/*
243	* Enable WP if odd variation.
244	*/
245	if (uArg & 1)
246	vmmGCEnableWP();
247
248	/*
249	* Execute the testcase.
250	*/
251	int rc = VERR_NOT_IMPLEMENTED;
252	switch (uOperation)
253	{
254	//case VMMGC_DO_TESTCASE_TRAP_0:
255	//case VMMGC_DO_TESTCASE_TRAP_1:
256	//case VMMGC_DO_TESTCASE_TRAP_2:
257
258	case VMMGC_DO_TESTCASE_TRAP_3:
259	{
260	if (uArg <= 1)
261	rc = vmmGCTestTrap3();
262	break;
263	}
264
265	//case VMMGC_DO_TESTCASE_TRAP_4:
266	//case VMMGC_DO_TESTCASE_TRAP_5:
267	//case VMMGC_DO_TESTCASE_TRAP_6:
268	//case VMMGC_DO_TESTCASE_TRAP_7:
269
270	case VMMGC_DO_TESTCASE_TRAP_8:
271	{
272	#ifndef DEBUG_bird /** @todo dynamic check that this won't tripple fault... */
273	if (uArg & 1)
274	break;
275	#endif
276	if (uArg <= 1)
277	rc = vmmGCTestTrap8();
278	break;
279	}
280
281	//VMMGC_DO_TESTCASE_TRAP_9,
282	//VMMGC_DO_TESTCASE_TRAP_0A,
283	//VMMGC_DO_TESTCASE_TRAP_0B,
284	//VMMGC_DO_TESTCASE_TRAP_0C,
285
286	case VMMGC_DO_TESTCASE_TRAP_0D:
287	{
288	if (uArg <= 1)
289	rc = vmmGCTestTrap0d();
290	break;
291	}
292
293	case VMMGC_DO_TESTCASE_TRAP_0E:
294	{
295	if (uArg <= 1)
296	rc = vmmGCTestTrap0e();
297	else if (uArg == 2 \|\| uArg == 4)
298	{
299	/*
300	* Test the use of a temporary #PF handler.
301	*/
302	rc = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, uArg != 4 ? vmmGCTestTmpPFHandler : vmmGCTestTmpPFHandlerCorruptFS);
303	if (RT_SUCCESS(rc))
304	{
305	rc = vmmGCTestTrap0e();
306
307	/* in case it didn't fire. */
308	int rc2 = TRPMGCSetTempHandler(pVM, X86_XCPT_PF, NULL);
309	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
310	rc = rc2;
311	}
312	}
313	break;
314	}
315	}
316
317	/*
318	* Re-enable WP.
319	*/
320	if (uArg & 1)
321	vmmGCDisableWP();
322
323	return rc;
324	}
325
326
327	/**
328	* Temporary \#PF trap handler for the \#PF test case.
329	*
330	* @returns VBox status code (appropriate for GC return).
331	* In this context RT_SUCCESS means to restart the instruction.
332	* @param pVM VM handle.
333	* @param pRegFrame Trap register frame.
334	*/
335	static DECLCALLBACK(int) vmmGCTestTmpPFHandler(PVM pVM, PCPUMCTXCORE pRegFrame)
336	{
337	if (pRegFrame->eip == (uintptr_t)vmmGCTestTrap0e_FaultEIP)
338	{
339	pRegFrame->eip = (uintptr_t)vmmGCTestTrap0e_ResumeEIP;
340	return VINF_SUCCESS;
341	}
342	return VERR_INTERNAL_ERROR;
343	}
344
345
346	/**
347	* Temporary \#PF trap handler for the \#PF test case, this one messes up the fs
348	* selector.
349	*
350	* @returns VBox status code (appropriate for GC return).
351	* In this context RT_SUCCESS means to restart the instruction.
352	* @param pVM VM handle.
353	* @param pRegFrame Trap register frame.
354	*/
355	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame)
356	{
357	int rc = vmmGCTestTmpPFHandler(pVM, pRegFrame);
358	pRegFrame->fs = 0x30;
359	return rc;
360	}
361

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source: vbox/trunk/src/VBox/VMM/VMMGC/VMMGC.cpp@ 29561

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