VMMTests.cpp@ 6457

Last change on this file since 6457 was 5999, checked in by vboxsync, 17 years ago
The Giant CDDL Dual-License Header Change.
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1	/* $Id: VMMTests.cpp 5999 2007-12-07 15:05:06Z vboxsync $ */
2	/** @file
3	* VMM - The Virtual Machine Monitor Core, Tests.
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 (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	//#define NO_SUPCALLR0VMM
19
20	/*******************************************************************************
21	* Header Files *
22	*******************************************************************************/
23	#define LOG_GROUP LOG_GROUP_VMM
24	#include <VBox/vmm.h>
25	#include <VBox/pdm.h>
26	#include <VBox/cpum.h>
27	#include <VBox/mm.h>
28	#include <VBox/trpm.h>
29	#include <VBox/selm.h>
30	#include "VMMInternal.h"
31	#include <VBox/vm.h>
32	#include <VBox/err.h>
33	#include <VBox/param.h>
34	#include <VBox/x86.h>
35	#include <VBox/hwaccm.h>
36
37	#include <iprt/assert.h>
38	#include <iprt/asm.h>
39	#include <iprt/time.h>
40	#include <iprt/stream.h>
41	#include <iprt/string.h>
42
43
44	/**
45	* Performs a testcase.
46	*
47	* @returns return value from the test.
48	* @param pVM The VM handle.
49	* @param enmTestcase The testcase operation to perform.
50	* @param uVariation The testcase variation id.
51	*/
52	static int vmmR3DoGCTest(PVM pVM, VMMGCOPERATION enmTestcase, unsigned uVariation)
53	{
54	RTGCPTR GCPtrEP;
55	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
56	if (VBOX_FAILURE(rc))
57	return rc;
58
59	CPUMHyperSetCtxCore(pVM, NULL);
60	memset(pVM->vmm.s.pbHCStack, 0xaa, VMM_STACK_SIZE);
61	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
62	CPUMPushHyper(pVM, uVariation);
63	CPUMPushHyper(pVM, enmTestcase);
64	CPUMPushHyper(pVM, pVM->pVMGC);
65	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
66	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
67	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
68	return SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
69	}
70
71
72	/**
73	* Performs a trap test.
74	*
75	* @returns Return value from the trap test.
76	* @param pVM The VM handle.
77	* @param u8Trap The trap number to test.
78	* @param uVariation The testcase variation.
79	* @param rcExpect The expected result.
80	* @param u32Eax The expected eax value.
81	* @param pszFaultEIP The fault address. Pass NULL if this isn't available or doesn't apply.
82	* @param pszDesc The test description.
83	*/
84	static int vmmR3DoTrapTest(PVM pVM, uint8_t u8Trap, unsigned uVariation, int rcExpect, uint32_t u32Eax, const char pszFaultEIP, const char pszDesc)
85	{
86	RTPrintf("VMM: testing 0%x / %d - %s\n", u8Trap, uVariation, pszDesc);
87
88	RTGCPTR GCPtrEP;
89	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
90	if (VBOX_FAILURE(rc))
91	return rc;
92
93	CPUMHyperSetCtxCore(pVM, NULL);
94	memset(pVM->vmm.s.pbHCStack, 0xaa, VMM_STACK_SIZE);
95	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
96	CPUMPushHyper(pVM, uVariation);
97	CPUMPushHyper(pVM, u8Trap + VMMGC_DO_TESTCASE_TRAP_FIRST);
98	CPUMPushHyper(pVM, pVM->pVMGC);
99	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
100	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
101	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
102	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
103	bool fDump = false;
104	if (rc != rcExpect)
105	{
106	RTPrintf("VMM: FAILURE - rc=%Vrc expected %Vrc\n", rc, rcExpect);
107	if (rc != VERR_NOT_IMPLEMENTED)
108	fDump = true;
109	}
110	else if ( rcExpect != VINF_SUCCESS
111	&& u8Trap != 8 /* double fault doesn't dare set TrapNo. */
112	&& u8Trap != 3 /* guest only, we're not in guest. */
113	&& u8Trap != 1 /* guest only, we're not in guest. */
114	&& u8Trap != TRPMGetTrapNo(pVM))
115	{
116	RTPrintf("VMM: FAILURE - Trap %#x expected %#x\n", TRPMGetTrapNo(pVM), u8Trap);
117	fDump = true;
118	}
119	else if (pszFaultEIP)
120	{
121	RTGCPTR GCPtrFault;
122	int rc2 = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, pszFaultEIP, &GCPtrFault);
123	if (VBOX_FAILURE(rc2))
124	RTPrintf("VMM: FAILURE - Failed to resolve symbol '%s', %Vrc!\n", pszFaultEIP, rc);
125	else if (GCPtrFault != CPUMGetHyperEIP(pVM))
126	{
127	RTPrintf("VMM: FAILURE - EIP=%VGv expected %VGv (%s)\n", CPUMGetHyperEIP(pVM), GCPtrFault, pszFaultEIP);
128	fDump = true;
129	}
130	}
131	else if (rcExpect != VINF_SUCCESS)
132	{
133	if (CPUMGetHyperSS(pVM) == SELMGetHyperDS(pVM))
134	RTPrintf("VMM: FAILURE - ss=%x expected %x\n", CPUMGetHyperSS(pVM), SELMGetHyperDS(pVM));
135	if (CPUMGetHyperES(pVM) == SELMGetHyperDS(pVM))
136	RTPrintf("VMM: FAILURE - es=%x expected %x\n", CPUMGetHyperES(pVM), SELMGetHyperDS(pVM));
137	if (CPUMGetHyperDS(pVM) == SELMGetHyperDS(pVM))
138	RTPrintf("VMM: FAILURE - ds=%x expected %x\n", CPUMGetHyperDS(pVM), SELMGetHyperDS(pVM));
139	if (CPUMGetHyperFS(pVM) == SELMGetHyperDS(pVM))
140	RTPrintf("VMM: FAILURE - fs=%x expected %x\n", CPUMGetHyperFS(pVM), SELMGetHyperDS(pVM));
141	if (CPUMGetHyperGS(pVM) == SELMGetHyperDS(pVM))
142	RTPrintf("VMM: FAILURE - gs=%x expected %x\n", CPUMGetHyperGS(pVM), SELMGetHyperDS(pVM));
143	if (CPUMGetHyperEDI(pVM) == 0x01234567)
144	RTPrintf("VMM: FAILURE - edi=%x expected %x\n", CPUMGetHyperEDI(pVM), 0x01234567);
145	if (CPUMGetHyperESI(pVM) == 0x42000042)
146	RTPrintf("VMM: FAILURE - esi=%x expected %x\n", CPUMGetHyperESI(pVM), 0x42000042);
147	if (CPUMGetHyperEBP(pVM) == 0xffeeddcc)
148	RTPrintf("VMM: FAILURE - ebp=%x expected %x\n", CPUMGetHyperEBP(pVM), 0xffeeddcc);
149	if (CPUMGetHyperEBX(pVM) == 0x89abcdef)
150	RTPrintf("VMM: FAILURE - ebx=%x expected %x\n", CPUMGetHyperEBX(pVM), 0x89abcdef);
151	if (CPUMGetHyperECX(pVM) == 0xffffaaaa)
152	RTPrintf("VMM: FAILURE - ecx=%x expected %x\n", CPUMGetHyperECX(pVM), 0xffffaaaa);
153	if (CPUMGetHyperEDX(pVM) == 0x77778888)
154	RTPrintf("VMM: FAILURE - edx=%x expected %x\n", CPUMGetHyperEDX(pVM), 0x77778888);
155	if (CPUMGetHyperEAX(pVM) == u32Eax)
156	RTPrintf("VMM: FAILURE - eax=%x expected %x\n", CPUMGetHyperEAX(pVM), u32Eax);
157	}
158	if (fDump)
159	VMMR3FatalDump(pVM, rc);
160	return rc;
161	}
162
163
164	/* execute the switch. */
165	VMMR3DECL(int) VMMDoTest(PVM pVM)
166	{
167	#if 1
168	#ifdef NO_SUPCALLR0VMM
169	RTPrintf("NO_SUPCALLR0VMM\n");
170	return VINF_SUCCESS;
171	#endif
172
173	/*
174	* Setup stack for calling VMMGCEntry().
175	*/
176	RTGCPTR GCPtrEP;
177	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
178	if (VBOX_SUCCESS(rc))
179	{
180	RTPrintf("VMM: VMMGCEntry=%VGv\n", GCPtrEP);
181
182	/*
183	* Test various crashes which we must be able to recover from.
184	*/
185	vmmR3DoTrapTest(pVM, 0x3, 0, VINF_EM_DBG_HYPER_ASSERTION, 0xf0f0f0f0, "vmmGCTestTrap3_FaultEIP", "int3");
186	vmmR3DoTrapTest(pVM, 0x3, 1, VINF_EM_DBG_HYPER_ASSERTION, 0xf0f0f0f0, "vmmGCTestTrap3_FaultEIP", "int3 WP");
187
188	#if defined(DEBUG_bird) /* guess most people would like to skip these since they write to com1. */
189	vmmR3DoTrapTest(pVM, 0x8, 0, VERR_TRPM_PANIC, 0x00000000, "vmmGCTestTrap8_FaultEIP", "#DF [#PG]");
190	SELMR3Relocate(pVM); /* this resets the busy flag of the Trap 08 TSS */
191	bool f;
192	rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "DoubleFault", &f);
193	#if !defined(DEBUG_bird)
194	if (VBOX_SUCCESS(rc) && f)
195	#endif
196	{
197	/* see tripple fault warnings in SELM and VMMGC.cpp. */
198	vmmR3DoTrapTest(pVM, 0x8, 1, VERR_TRPM_PANIC, 0x00000000, "vmmGCTestTrap8_FaultEIP", "#DF [#PG] WP");
199	SELMR3Relocate(pVM); /* this resets the busy flag of the Trap 08 TSS */
200	}
201	#endif
202
203	vmmR3DoTrapTest(pVM, 0xd, 0, VERR_TRPM_DONT_PANIC, 0xf0f0f0f0, "vmmGCTestTrap0d_FaultEIP", "ltr #GP");
204	///@todo find a better \#GP case, on intel ltr will \#PF (busy update?) and not \#GP.
205	//vmmR3DoTrapTest(pVM, 0xd, 1, VERR_TRPM_DONT_PANIC, 0xf0f0f0f0, "vmmGCTestTrap0d_FaultEIP", "ltr #GP WP");
206
207	vmmR3DoTrapTest(pVM, 0xe, 0, VERR_TRPM_DONT_PANIC, 0x00000000, "vmmGCTestTrap0e_FaultEIP", "#PF (NULL)");
208	vmmR3DoTrapTest(pVM, 0xe, 1, VERR_TRPM_DONT_PANIC, 0x00000000, "vmmGCTestTrap0e_FaultEIP", "#PF (NULL) WP");
209	vmmR3DoTrapTest(pVM, 0xe, 2, VINF_SUCCESS, 0x00000000, NULL, "#PF w/Tmp Handler");
210	vmmR3DoTrapTest(pVM, 0xe, 4, VINF_SUCCESS, 0x00000000, NULL, "#PF w/Tmp Handler and bad fs");
211
212	/*
213	* Set a debug register and perform a context switch.
214	*/
215	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
216	if (rc != VINF_SUCCESS)
217	{
218	RTPrintf("VMM: Nop test failed, rc=%Vrc not VINF_SUCCESS\n", rc);
219	return rc;
220	}
221
222	/* a harmless breakpoint */
223	RTPrintf("VMM: testing hardware bp at 0x10000 (not hit)\n");
224	DBGFADDRESS Addr;
225	DBGFR3AddrFromFlat(pVM, &Addr, 0x10000);
226	RTUINT iBp0;
227	rc = DBGFR3BpSetReg(pVM, &Addr, 0, ~(uint64_t)0, X86_DR7_RW_EO, 1, &iBp0);
228	AssertReleaseRC(rc);
229	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
230	if (rc != VINF_SUCCESS)
231	{
232	RTPrintf("VMM: DR0=0x10000 test failed with rc=%Vrc!\n", rc);
233	return rc;
234	}
235
236	/* a bad one at VMMGCEntry */
237	RTPrintf("VMM: testing hardware bp at VMMGCEntry (hit)\n");
238	DBGFR3AddrFromFlat(pVM, &Addr, GCPtrEP);
239	RTUINT iBp1;
240	rc = DBGFR3BpSetReg(pVM, &Addr, 0, ~(uint64_t)0, X86_DR7_RW_EO, 1, &iBp1);
241	AssertReleaseRC(rc);
242	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
243	if (rc != VINF_EM_DBG_HYPER_BREAKPOINT)
244	{
245	RTPrintf("VMM: DR1=VMMGCEntry test failed with rc=%Vrc! expected VINF_EM_RAW_BREAKPOINT_HYPER\n", rc);
246	return rc;
247	}
248
249	/* resume the breakpoint */
250	RTPrintf("VMM: resuming hyper after breakpoint\n");
251	CPUMSetHyperEFlags(pVM, CPUMGetHyperEFlags(pVM) \| X86_EFL_RF);
252	rc = VMMR3ResumeHyper(pVM);
253	if (rc != VINF_SUCCESS)
254	{
255	RTPrintf("VMM: failed to resume on hyper breakpoint, rc=%Vrc\n", rc);
256	return rc;
257	}
258
259	/* engage the breakpoint again and try single stepping. */
260	RTPrintf("VMM: testing hardware bp at VMMGCEntry + stepping\n");
261	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
262	if (rc != VINF_EM_DBG_HYPER_BREAKPOINT)
263	{
264	RTPrintf("VMM: DR1=VMMGCEntry test failed with rc=%Vrc! expected VINF_EM_RAW_BREAKPOINT_HYPER\n", rc);
265	return rc;
266	}
267
268	RTGCUINTREG OldPc = CPUMGetHyperEIP(pVM);
269	RTPrintf("%RGr=>", OldPc);
270	unsigned i;
271	for (i = 0; i < 8; i++)
272	{
273	CPUMSetHyperEFlags(pVM, CPUMGetHyperEFlags(pVM) \| X86_EFL_TF \| X86_EFL_RF);
274	rc = VMMR3ResumeHyper(pVM);
275	if (rc != VINF_EM_DBG_HYPER_STEPPED)
276	{
277	RTPrintf("\nVMM: failed to step on hyper breakpoint, rc=%Vrc\n", rc);
278	return rc;
279	}
280	RTGCUINTREG Pc = CPUMGetHyperEIP(pVM);
281	RTPrintf("%RGr=>", Pc);
282	if (Pc == OldPc)
283	{
284	RTPrintf("\nVMM: step failed, PC: %RGr -> %RGr\n", OldPc, Pc);
285	return VERR_GENERAL_FAILURE;
286	}
287	OldPc = Pc;
288	}
289	RTPrintf("ok\n");
290
291	/* done, clear it */
292	if ( VBOX_FAILURE(DBGFR3BpClear(pVM, iBp0))
293	\|\| VBOX_FAILURE(DBGFR3BpClear(pVM, iBp1)))
294	{
295	RTPrintf("VMM: Failed to clear breakpoints!\n");
296	return VERR_GENERAL_FAILURE;
297	}
298	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
299	if (rc != VINF_SUCCESS)
300	{
301	RTPrintf("VMM: NOP failed, rc=%Vrc\n", rc);
302	return rc;
303	}
304
305	/*
306	* Interrupt masking.
307	*/
308	RTPrintf("VMM: interrupt masking...\n"); RTStrmFlush(g_pStdOut); RTThreadSleep(250);
309	for (i = 0; i < 10000; i++)
310	{
311	uint64_t StartTick = ASMReadTSC();
312	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_INTERRUPT_MASKING, 0);
313	if (rc != VINF_SUCCESS)
314	{
315	RTPrintf("VMM: Interrupt masking failed: rc=%Vrc\n", rc);
316	return rc;
317	}
318	uint64_t Ticks = ASMReadTSC() - StartTick;
319	if (Ticks < (SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) / 10000))
320	RTPrintf("Warning: Ticks=%RU64 (< %RU64)\n", Ticks, SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) / 10000);
321	}
322
323	/*
324	* Interrupt forwarding.
325	*/
326	CPUMHyperSetCtxCore(pVM, NULL);
327	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
328	CPUMPushHyper(pVM, 0);
329	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_HYPER_INTERRUPT);
330	CPUMPushHyper(pVM, pVM->pVMGC);
331	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
332	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
333	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
334	Log(("trampoline=%x\n", pVM->vmm.s.pfnGCCallTrampoline));
335
336	/*
337	* Switch and do da thing.
338	*/
339	RTPrintf("VMM: interrupt forwarding...\n"); RTStrmFlush(g_pStdOut); RTThreadSleep(250);
340	i = 0;
341	uint64_t tsBegin = RTTimeNanoTS();
342	uint64_t TickStart = ASMReadTSC();
343	do
344	{
345	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
346	if (VBOX_FAILURE(rc))
347	{
348	Log(("VMM: GC returned fatal %Vra in iteration %d\n", rc, i));
349	VMMR3FatalDump(pVM, rc);
350	return rc;
351	}
352	i++;
353	if (!(i % 32))
354	Log(("VMM: iteration %d, esi=%08x edi=%08x ebx=%08x\n",
355	i, CPUMGetHyperESI(pVM), CPUMGetHyperEDI(pVM), CPUMGetHyperEBX(pVM)));
356	} while (rc == VINF_EM_RAW_INTERRUPT_HYPER);
357	uint64_t TickEnd = ASMReadTSC();
358	uint64_t tsEnd = RTTimeNanoTS();
359
360	uint64_t Elapsed = tsEnd - tsBegin;
361	uint64_t PerIteration = Elapsed / (uint64_t)i;
362	uint64_t cTicksElapsed = TickEnd - TickStart;
363	uint64_t cTicksPerIteration = cTicksElapsed / (uint64_t)i;
364
365	RTPrintf("VMM: %8d interrupts in %11llu ns (%11llu ticks), %10llu ns/iteration (%11llu ticks)\n",
366	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration);
367	Log(("VMM: %8d interrupts in %11llu ns (%11llu ticks), %10llu ns/iteration (%11llu ticks)\n",
368	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration));
369
370	/*
371	* These forced actions are not necessary for the test and trigger breakpoints too.
372	*/
373	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
374	VM_FF_CLEAR(pVM, VM_FF_SELM_SYNC_TSS);
375
376	/*
377	* Profile switching.
378	*/
379	RTPrintf("VMM: profiling switcher...\n");
380	Log(("VMM: profiling switcher...\n"));
381	uint64_t TickMin = ~0;
382	tsBegin = RTTimeNanoTS();
383	TickStart = ASMReadTSC();
384	for (i = 0; i < 1000000; i++)
385	{
386	CPUMHyperSetCtxCore(pVM, NULL);
387	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
388	CPUMPushHyper(pVM, 0);
389	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_NOP);
390	CPUMPushHyper(pVM, pVM->pVMGC);
391	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
392	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
393	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
394
395	uint64_t TickThisStart = ASMReadTSC();
396	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
397	uint64_t TickThisElapsed = ASMReadTSC() - TickThisStart;
398	if (VBOX_FAILURE(rc))
399	{
400	Log(("VMM: GC returned fatal %Vra in iteration %d\n", rc, i));
401	VMMR3FatalDump(pVM, rc);
402	return rc;
403	}
404	if (TickThisElapsed < TickMin)
405	TickMin = TickThisElapsed;
406	}
407	TickEnd = ASMReadTSC();
408	tsEnd = RTTimeNanoTS();
409
410	Elapsed = tsEnd - tsBegin;
411	PerIteration = Elapsed / (uint64_t)i;
412	cTicksElapsed = TickEnd - TickStart;
413	cTicksPerIteration = cTicksElapsed / (uint64_t)i;
414
415	RTPrintf("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
416	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin);
417	Log(("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
418	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin));
419
420	rc = VINF_SUCCESS;
421	}
422	else
423	AssertMsgFailed(("Failed to resolved VMMGC.gc::VMMGCEntry(), rc=%Vrc\n", rc));
424	#endif
425	return rc;
426	}
427
428	#define SYNC_SEL(pHyperCtx, reg) \
429	if (pHyperCtx->reg) \
430	{ \
431	SELMSELINFO selInfo; \
432	int rc = SELMR3GetShadowSelectorInfo(pVM, pHyperCtx->reg, &selInfo); \
433	AssertRC(rc); \
434	\
435	pHyperCtx->reg##Hid.u32Base = selInfo.GCPtrBase; \
436	pHyperCtx->reg##Hid.u32Limit = selInfo.cbLimit; \
437	pHyperCtx->reg##Hid.Attr.n.u1Present = selInfo.Raw.Gen.u1Present; \
438	pHyperCtx->reg##Hid.Attr.n.u1DefBig = selInfo.Raw.Gen.u1DefBig; \
439	pHyperCtx->reg##Hid.Attr.n.u1Granularity = selInfo.Raw.Gen.u1Granularity; \
440	pHyperCtx->reg##Hid.Attr.n.u4Type = selInfo.Raw.Gen.u4Type; \
441	pHyperCtx->reg##Hid.Attr.n.u2Dpl = selInfo.Raw.Gen.u2Dpl; \
442	pHyperCtx->reg##Hid.Attr.n.u1DescType = selInfo.Raw.Gen.u1DescType; \
443	pHyperCtx->reg##Hid.Attr.n.u1Reserved = selInfo.Raw.Gen.u1Reserved; \
444	}
445
446	/* execute the switch. */
447	VMMR3DECL(int) VMMDoHwAccmTest(PVM pVM)
448	{
449	uint32_t i;
450	int rc;
451	PCPUMCTX pHyperCtx, pGuestCtx;
452	RTGCPHYS CR3Phys = 0x0; /* fake address */
453
454	if (!HWACCMR3IsAllowed(pVM))
455	{
456	RTPrintf("VMM: Hardware accelerated test not available!\n");
457	return VERR_ACCESS_DENIED;
458	}
459
460	/*
461	* These forced actions are not necessary for the test and trigger breakpoints too.
462	*/
463	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
464	VM_FF_CLEAR(pVM, VM_FF_SELM_SYNC_TSS);
465
466	/* Enable mapping of the hypervisor into the shadow page table. */
467	PGMR3ChangeShwPDMappings(pVM, true);
468
469	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
470
471	pHyperCtx->cr0 = X86_CR0_PE \| X86_CR0_WP \| X86_CR0_PG \| X86_CR0_TS \| X86_CR0_ET \| X86_CR0_NE \| X86_CR0_MP;
472	pHyperCtx->cr4 = X86_CR4_PGE \| X86_CR4_OSFSXR \| X86_CR4_OSXMMEEXCPT;
473	PGMChangeMode(pVM, pHyperCtx->cr0, pHyperCtx->cr4, 0);
474	PGMSyncCR3(pVM, pHyperCtx->cr0, CR3Phys, pHyperCtx->cr4, true);
475
476	VM_FF_CLEAR(pVM, VM_FF_TO_R3);
477	VM_FF_CLEAR(pVM, VM_FF_TIMER);
478	VM_FF_CLEAR(pVM, VM_FF_REQUEST);
479
480	/*
481	* Setup stack for calling VMMGCEntry().
482	*/
483	RTGCPTR GCPtrEP;
484	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
485	if (VBOX_SUCCESS(rc))
486	{
487	RTPrintf("VMM: VMMGCEntry=%VGv\n", GCPtrEP);
488
489	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
490
491	/* Fill in hidden selector registers for the hypervisor state. */
492	SYNC_SEL(pHyperCtx, cs);
493	SYNC_SEL(pHyperCtx, ds);
494	SYNC_SEL(pHyperCtx, es);
495	SYNC_SEL(pHyperCtx, fs);
496	SYNC_SEL(pHyperCtx, gs);
497	SYNC_SEL(pHyperCtx, ss);
498	SYNC_SEL(pHyperCtx, tr);
499
500	/*
501	* Profile switching.
502	*/
503	RTPrintf("VMM: profiling switcher...\n");
504	Log(("VMM: profiling switcher...\n"));
505	uint64_t TickMin = ~0;
506	uint64_t tsBegin = RTTimeNanoTS();
507	uint64_t TickStart = ASMReadTSC();
508	for (i = 0; i < 1000000; i++)
509	{
510	CPUMHyperSetCtxCore(pVM, NULL);
511
512	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
513	CPUMPushHyper(pVM, 0);
514	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_HWACCM_NOP);
515	CPUMPushHyper(pVM, pVM->pVMGC);
516	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
517	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
518	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
519
520	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
521	CPUMQueryGuestCtxPtr(pVM, &pGuestCtx);
522
523	/* Copy the hypervisor context to make sure we have a valid guest context. */
524	pGuestCtx = pHyperCtx;
525	pGuestCtx->cr3 = CR3Phys;
526
527	VM_FF_CLEAR(pVM, VM_FF_TO_R3);
528	VM_FF_CLEAR(pVM, VM_FF_TIMER);
529
530	uint64_t TickThisStart = ASMReadTSC();
531	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_HWACC_RUN, NULL);
532	uint64_t TickThisElapsed = ASMReadTSC() - TickThisStart;
533	if (VBOX_FAILURE(rc))
534	{
535	Log(("VMM: R0 returned fatal %Vrc in iteration %d\n", rc, i));
536	VMMR3FatalDump(pVM, rc);
537	return rc;
538	}
539	if (TickThisElapsed < TickMin)
540	TickMin = TickThisElapsed;
541	}
542	uint64_t TickEnd = ASMReadTSC();
543	uint64_t tsEnd = RTTimeNanoTS();
544
545	uint64_t Elapsed = tsEnd - tsBegin;
546	uint64_t PerIteration = Elapsed / (uint64_t)i;
547	uint64_t cTicksElapsed = TickEnd - TickStart;
548	uint64_t cTicksPerIteration = cTicksElapsed / (uint64_t)i;
549
550	RTPrintf("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
551	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin);
552	Log(("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
553	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin));
554
555	rc = VINF_SUCCESS;
556	}
557	else
558	AssertMsgFailed(("Failed to resolved VMMGC.gc::VMMGCEntry(), rc=%Vrc\n", rc));
559
560	return rc;
561	}
562

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source: vbox/trunk/src/VBox/VMM/VMMTests.cpp@ 6457

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