VMMGC.cpp@ 13813

Last change on this file since 13813 was 13813, checked in by vboxsync, 16 years ago
#1865: Final VMM cleanups.
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File size: 10.4 KB

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1	/* $Id: VMMGC.cpp 13813 2008-11-04 21:55:34Z vboxsync $ */
2	/** @file
3	* VMM - Raw-mode Context.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
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	#include <iprt/initterm.h>
37
38
39	/*******************************************************************************
40	* Global Variables *
41	*******************************************************************************/
42	/** Default logger instance. */
43	extern "C" DECLIMPORT(RTLOGGERRC) g_Logger;
44	extern "C" DECLIMPORT(RTLOGGERRC) g_RelLogger;
45
46
47	/*******************************************************************************
48	* Internal Functions *
49	*******************************************************************************/
50	static int vmmGCTest(PVM pVM, unsigned uOperation, unsigned uArg);
51	static DECLCALLBACK(int) vmmGCTestTmpPFHandler(PVM pVM, PCPUMCTXCORE pRegFrame);
52	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame);
53
54
55
56	/**
57	* The GC entry point.
58	*
59	* @returns VBox status code.
60	* @param pVM The VM to operate on.
61	* @param uOperation Which operation to execute (VMMGCOPERATION).
62	* @param uArg Argument to that operation.
63	*/
64	VMMRCDECL(int) VMMGCEntry(PVM pVM, unsigned uOperation, unsigned uArg, ...)
65	{
66	/* todo */
67	switch (uOperation)
68	{
69	/*
70	* Init RC modules.
71	*/
72	case VMMGC_DO_VMMGC_INIT:
73	{
74	/*
75	* Validate the svn revision (uArg).
76	*/
77	if (uArg != VMMGetSvnRev())
78	return VERR_VERSION_MISMATCH;
79
80	/*
81	* Initialize the runtime.
82	* (The program timestamp is found in the elipsis.)
83	*/
84	va_list va;
85	va_start(va, uArg);
86	uint64_t u64TS = va_arg(va, uint64_t);
87	va_end(va);
88
89	int rc = RTRCInit(u64TS);
90	Log(("VMMGCEntry: VMMGC_DO_VMMGC_INIT - uArg=%u (svn revision) u64TS=%RX64; rc=%Rrc\n", uArg, u64TS, rc));
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	return VMMGCCallHost(pVM, VMMCALLHOST_VMM_LOGGER_FLUSH, 0);
175	}
176
177
178	/**
179	* Switches from guest context to host context.
180	*
181	* @param pVM The VM handle.
182	* @param rc The status code.
183	*/
184	VMMRCDECL(void) VMMGCGuestToHost(PVM pVM, int rc)
185	{
186	pVM->vmm.s.pfnGuestToHostRC(rc);
187	}
188
189
190	/**
191	* Calls the ring-3 host code.
192	*
193	* @returns VBox status code of the ring-3 call.
194	* @param pVM The VM handle.
195	* @param enmOperation The operation.
196	* @param uArg The argument to the operation.
197	*/
198	VMMRCDECL(int) VMMGCCallHost(PVM pVM, VMMCALLHOST enmOperation, uint64_t uArg)
199	{
200	/** @todo profile this! */
201	pVM->vmm.s.enmCallHostOperation = enmOperation;
202	pVM->vmm.s.u64CallHostArg = uArg;
203	pVM->vmm.s.rcCallHost = VERR_INTERNAL_ERROR;
204	pVM->vmm.s.pfnGuestToHostRC(VINF_VMM_CALL_HOST);
205	return pVM->vmm.s.rcCallHost;
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 (VBOX_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 (VBOX_FAILURE(rc2) && VBOX_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 VBOX_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 selector.
348	*
349	* @returns VBox status code (appropriate for GC return).
350	* In this context VBOX_SUCCESS means to restart the instruction.
351	* @param pVM VM handle.
352	* @param pRegFrame Trap register frame.
353	*/
354	static DECLCALLBACK(int) vmmGCTestTmpPFHandlerCorruptFS(PVM pVM, PCPUMCTXCORE pRegFrame)
355	{
356	int rc = vmmGCTestTmpPFHandler(pVM, pRegFrame);
357	pRegFrame->fs = 0x30;
358	return rc;
359	}
360

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source: vbox/trunk/src/VBox/VMM/VMMGC/VMMGC.cpp@ 13813

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