VMMTests.cpp@ 2088

Last change on this file since 2088 was 1313, checked in by vboxsync, 18 years ago
Moved the VMM tests into a separate file.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 22.9 KB

Line
1	/* $Id: VMMTests.cpp 1313 2007-03-07 20:22:12Z vboxsync $ */
2	/** @file
3	* VMM - The Virtual Machine Monitor Core, Tests.
4	*/
5
6	/*
7	* Copyright (C) 2006 InnoTek Systemberatung 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	//#define NO_SUPCALLR0VMM
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_VMM
28	#include <VBox/vmm.h>
29	#include <VBox/pdm.h>
30	#include <VBox/cpum.h>
31	#include <VBox/mm.h>
32	#include <VBox/trpm.h>
33	#include <VBox/selm.h>
34	#include "VMMInternal.h"
35	#include <VBox/vm.h>
36	#include <VBox/err.h>
37	#include <VBox/param.h>
38	#include <VBox/x86.h>
39	#include <VBox/hwaccm.h>
40
41	#include <iprt/assert.h>
42	#include <iprt/asm.h>
43	#include <iprt/time.h>
44	#include <iprt/stream.h>
45	#include <iprt/string.h>
46
47
48	/**
49	* Performs a testcase.
50	*
51	* @returns return value from the test.
52	* @param pVM The VM handle.
53	* @param enmTestcase The testcase operation to perform.
54	* @param uVariation The testcase variation id.
55	*/
56	static int vmmR3DoGCTest(PVM pVM, VMMGCOPERATION enmTestcase, unsigned uVariation)
57	{
58	RTGCPTR GCPtrEP;
59	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
60	if (VBOX_FAILURE(rc))
61	return rc;
62
63	CPUMHyperSetCtxCore(pVM, NULL);
64	memset(pVM->vmm.s.pbHCStack, 0xaa, VMM_STACK_SIZE);
65	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
66	CPUMPushHyper(pVM, uVariation);
67	CPUMPushHyper(pVM, enmTestcase);
68	CPUMPushHyper(pVM, pVM->pVMGC);
69	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
70	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
71	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
72	return SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
73	}
74
75
76	/**
77	* Performs a trap test.
78	*
79	* @returns Return value from the trap test.
80	* @param pVM The VM handle.
81	* @param u8Trap The trap number to test.
82	* @param uVariation The testcase variation.
83	* @param rcExpect The expected result.
84	* @param u32Eax The expected eax value.
85	* @param pszFaultEIP The fault address. Pass NULL if this isn't available or doesn't apply.
86	* @param pszDesc The test description.
87	*/
88	static int vmmR3DoTrapTest(PVM pVM, uint8_t u8Trap, unsigned uVariation, int rcExpect, uint32_t u32Eax, const char pszFaultEIP, const char pszDesc)
89	{
90	RTPrintf("VMM: testing 0%x / %d - %s\n", u8Trap, uVariation, pszDesc);
91
92	RTGCPTR GCPtrEP;
93	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
94	if (VBOX_FAILURE(rc))
95	return rc;
96
97	CPUMHyperSetCtxCore(pVM, NULL);
98	memset(pVM->vmm.s.pbHCStack, 0xaa, VMM_STACK_SIZE);
99	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
100	CPUMPushHyper(pVM, uVariation);
101	CPUMPushHyper(pVM, u8Trap + VMMGC_DO_TESTCASE_TRAP_FIRST);
102	CPUMPushHyper(pVM, pVM->pVMGC);
103	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
104	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
105	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
106	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
107	bool fDump = false;
108	if (rc != rcExpect)
109	{
110	RTPrintf("VMM: FAILURE - rc=%Vrc expected %Vrc\n", rc, rcExpect);
111	if (rc != VERR_NOT_IMPLEMENTED)
112	fDump = true;
113	}
114	else if ( rcExpect != VINF_SUCCESS
115	&& u8Trap != 8 /* double fault doesn't dare set TrapNo. */
116	&& u8Trap != 3 /* guest only, we're not in guest. */
117	&& u8Trap != 1 /* guest only, we're not in guest. */
118	&& u8Trap != TRPMGetTrapNo(pVM))
119	{
120	RTPrintf("VMM: FAILURE - Trap %#x expected %#x\n", TRPMGetTrapNo(pVM), u8Trap);
121	fDump = true;
122	}
123	else if (pszFaultEIP)
124	{
125	RTGCPTR GCPtrFault;
126	int rc2 = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, pszFaultEIP, &GCPtrFault);
127	if (VBOX_FAILURE(rc2))
128	RTPrintf("VMM: FAILURE - Failed to resolve symbol '%s', %Vrc!\n", pszFaultEIP, rc);
129	else if (GCPtrFault != CPUMGetHyperEIP(pVM))
130	{
131	RTPrintf("VMM: FAILURE - EIP=%VGv expected %VGv (%s)\n", CPUMGetHyperEIP(pVM), GCPtrFault, pszFaultEIP);
132	fDump = true;
133	}
134	}
135	else if (rcExpect != VINF_SUCCESS)
136	{
137	if (CPUMGetHyperSS(pVM) == SELMGetHyperDS(pVM))
138	RTPrintf("VMM: FAILURE - ss=%x expected %x\n", CPUMGetHyperSS(pVM), SELMGetHyperDS(pVM));
139	if (CPUMGetHyperES(pVM) == SELMGetHyperDS(pVM))
140	RTPrintf("VMM: FAILURE - es=%x expected %x\n", CPUMGetHyperES(pVM), SELMGetHyperDS(pVM));
141	if (CPUMGetHyperDS(pVM) == SELMGetHyperDS(pVM))
142	RTPrintf("VMM: FAILURE - ds=%x expected %x\n", CPUMGetHyperDS(pVM), SELMGetHyperDS(pVM));
143	if (CPUMGetHyperFS(pVM) == SELMGetHyperDS(pVM))
144	RTPrintf("VMM: FAILURE - fs=%x expected %x\n", CPUMGetHyperFS(pVM), SELMGetHyperDS(pVM));
145	if (CPUMGetHyperGS(pVM) == SELMGetHyperDS(pVM))
146	RTPrintf("VMM: FAILURE - gs=%x expected %x\n", CPUMGetHyperGS(pVM), SELMGetHyperDS(pVM));
147	if (CPUMGetHyperEDI(pVM) == 0x01234567)
148	RTPrintf("VMM: FAILURE - edi=%x expected %x\n", CPUMGetHyperEDI(pVM), 0x01234567);
149	if (CPUMGetHyperESI(pVM) == 0x42000042)
150	RTPrintf("VMM: FAILURE - esi=%x expected %x\n", CPUMGetHyperESI(pVM), 0x42000042);
151	if (CPUMGetHyperEBP(pVM) == 0xffeeddcc)
152	RTPrintf("VMM: FAILURE - ebp=%x expected %x\n", CPUMGetHyperEBP(pVM), 0xffeeddcc);
153	if (CPUMGetHyperEBX(pVM) == 0x89abcdef)
154	RTPrintf("VMM: FAILURE - ebx=%x expected %x\n", CPUMGetHyperEBX(pVM), 0x89abcdef);
155	if (CPUMGetHyperECX(pVM) == 0xffffaaaa)
156	RTPrintf("VMM: FAILURE - ecx=%x expected %x\n", CPUMGetHyperECX(pVM), 0xffffaaaa);
157	if (CPUMGetHyperEDX(pVM) == 0x77778888)
158	RTPrintf("VMM: FAILURE - edx=%x expected %x\n", CPUMGetHyperEDX(pVM), 0x77778888);
159	if (CPUMGetHyperEAX(pVM) == u32Eax)
160	RTPrintf("VMM: FAILURE - eax=%x expected %x\n", CPUMGetHyperEAX(pVM), u32Eax);
161	}
162	if (fDump)
163	VMMR3FatalDump(pVM, rc);
164	return rc;
165	}
166
167
168	/* execute the switch. */
169	VMMR3DECL(int) VMMDoTest(PVM pVM)
170	{
171	#if 1
172	#ifdef NO_SUPCALLR0VMM
173	RTPrintf("NO_SUPCALLR0VMM\n");
174	return VINF_SUCCESS;
175	#endif
176
177	/*
178	* Setup stack for calling VMMGCEntry().
179	*/
180	RTGCPTR GCPtrEP;
181	int rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
182	if (VBOX_SUCCESS(rc))
183	{
184	RTPrintf("VMM: VMMGCEntry=%VGv\n", GCPtrEP);
185
186	/*
187	* Test various crashes which we must be able to recover from.
188	*/
189	vmmR3DoTrapTest(pVM, 0x3, 0, VINF_EM_DBG_HYPER_ASSERTION, 0xf0f0f0f0, "vmmGCTestTrap3_FaultEIP", "int3");
190	vmmR3DoTrapTest(pVM, 0x3, 1, VINF_EM_DBG_HYPER_ASSERTION, 0xf0f0f0f0, "vmmGCTestTrap3_FaultEIP", "int3 WP");
191
192	#if defined(DEBUG_bird) /* guess most people would like to skip these since they write to com1. */
193	vmmR3DoTrapTest(pVM, 0x8, 0, VERR_TRPM_PANIC, 0x00000000, "vmmGCTestTrap8_FaultEIP", "#DF [#PG]");
194	SELMR3Relocate(pVM); /* this resets the busy flag of the Trap 08 TSS */
195	bool f;
196	rc = CFGMR3QueryBool(CFGMR3GetRoot(pVM), "DoubleFault", &f);
197	#if !defined(DEBUG_bird)
198	if (VBOX_SUCCESS(rc) && f)
199	#endif
200	{
201	/* see tripple fault warnings in SELM and VMMGC.cpp. */
202	vmmR3DoTrapTest(pVM, 0x8, 1, VERR_TRPM_PANIC, 0x00000000, "vmmGCTestTrap8_FaultEIP", "#DF [#PG] WP");
203	SELMR3Relocate(pVM); /* this resets the busy flag of the Trap 08 TSS */
204	}
205	#endif
206
207	vmmR3DoTrapTest(pVM, 0xd, 0, VERR_TRPM_DONT_PANIC, 0xf0f0f0f0, "vmmGCTestTrap0d_FaultEIP", "ltr #GP");
208	///@todo find a better \#GP case, on intel ltr will \#PF (busy update?) and not \#GP.
209	//vmmR3DoTrapTest(pVM, 0xd, 1, VERR_TRPM_DONT_PANIC, 0xf0f0f0f0, "vmmGCTestTrap0d_FaultEIP", "ltr #GP WP");
210
211	vmmR3DoTrapTest(pVM, 0xe, 0, VERR_TRPM_DONT_PANIC, 0x00000000, "vmmGCTestTrap0e_FaultEIP", "#PF (NULL)");
212	vmmR3DoTrapTest(pVM, 0xe, 1, VERR_TRPM_DONT_PANIC, 0x00000000, "vmmGCTestTrap0e_FaultEIP", "#PF (NULL) WP");
213	vmmR3DoTrapTest(pVM, 0xe, 2, VINF_SUCCESS, 0x00000000, NULL, "#PF w/Tmp Handler");
214	vmmR3DoTrapTest(pVM, 0xe, 4, VINF_SUCCESS, 0x00000000, NULL, "#PF w/Tmp Handler and bad fs");
215
216	/*
217	* Set a debug register and perform a context switch.
218	*/
219	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
220	if (rc != VINF_SUCCESS)
221	{
222	RTPrintf("VMM: Nop test failed, rc=%Vrc not VINF_SUCCESS\n", rc);
223	return rc;
224	}
225
226	/* a harmless breakpoint */
227	RTPrintf("VMM: testing hardware bp at 0x10000 (not hit)\n");
228	DBGFADDRESS Addr;
229	DBGFR3AddrFromFlat(pVM, &Addr, 0x10000);
230	RTUINT iBp0;
231	rc = DBGFR3BpSetReg(pVM, &Addr, 0, ~(uint64_t)0, X86_DR7_RW_EO, 1, &iBp0);
232	AssertReleaseRC(rc);
233	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
234	if (rc != VINF_SUCCESS)
235	{
236	RTPrintf("VMM: DR0=0x10000 test failed with rc=%Vrc!\n", rc);
237	return rc;
238	}
239
240	/* a bad one at VMMGCEntry */
241	RTPrintf("VMM: testing hardware bp at VMMGCEntry (hit)\n");
242	DBGFR3AddrFromFlat(pVM, &Addr, GCPtrEP);
243	RTUINT iBp1;
244	rc = DBGFR3BpSetReg(pVM, &Addr, 0, ~(uint64_t)0, X86_DR7_RW_EO, 1, &iBp1);
245	AssertReleaseRC(rc);
246	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
247	if (rc != VINF_EM_DBG_HYPER_BREAKPOINT)
248	{
249	RTPrintf("VMM: DR1=VMMGCEntry test failed with rc=%Vrc! expected VINF_EM_RAW_BREAKPOINT_HYPER\n", rc);
250	return rc;
251	}
252
253	/* resume the breakpoint */
254	RTPrintf("VMM: resuming hyper after breakpoint\n");
255	CPUMSetHyperEFlags(pVM, CPUMGetHyperEFlags(pVM) \| X86_EFL_RF);
256	rc = VMMR3ResumeHyper(pVM);
257	if (rc != VINF_SUCCESS)
258	{
259	RTPrintf("VMM: failed to resume on hyper breakpoint, rc=%Vrc\n", rc);
260	return rc;
261	}
262
263	/* engage the breakpoint again and try single stepping. */
264	RTPrintf("VMM: testing hardware bp at VMMGCEntry + stepping\n");
265	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
266	if (rc != VINF_EM_DBG_HYPER_BREAKPOINT)
267	{
268	RTPrintf("VMM: DR1=VMMGCEntry test failed with rc=%Vrc! expected VINF_EM_RAW_BREAKPOINT_HYPER\n", rc);
269	return rc;
270	}
271
272	RTGCUINTREG OldPc = CPUMGetHyperEIP(pVM);
273	RTPrintf("%RGr=>", OldPc);
274	unsigned i;
275	for (i = 0; i < 8; i++)
276	{
277	CPUMSetHyperEFlags(pVM, CPUMGetHyperEFlags(pVM) \| X86_EFL_TF \| X86_EFL_RF);
278	rc = VMMR3ResumeHyper(pVM);
279	if (rc != VINF_EM_DBG_HYPER_STEPPED)
280	{
281	RTPrintf("\nVMM: failed to step on hyper breakpoint, rc=%Vrc\n", rc);
282	return rc;
283	}
284	RTGCUINTREG Pc = CPUMGetHyperEIP(pVM);
285	RTPrintf("%RGr=>", Pc);
286	if (Pc == OldPc)
287	{
288	RTPrintf("\nVMM: step failed, PC: %RGr -> %RGr\n", OldPc, Pc);
289	return VERR_GENERAL_FAILURE;
290	}
291	OldPc = Pc;
292	}
293	RTPrintf("ok\n");
294
295	/* done, clear it */
296	if ( VBOX_FAILURE(DBGFR3BpClear(pVM, iBp0))
297	\|\| VBOX_FAILURE(DBGFR3BpClear(pVM, iBp1)))
298	{
299	RTPrintf("VMM: Failed to clear breakpoints!\n");
300	return VERR_GENERAL_FAILURE;
301	}
302	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_NOP, 0);
303	if (rc != VINF_SUCCESS)
304	{
305	RTPrintf("VMM: NOP failed, rc=%Vrc\n", rc);
306	return rc;
307	}
308
309	/*
310	* Interrupt masking.
311	*/
312	RTPrintf("VMM: interrupt masking...\n"); RTStrmFlush(g_pStdOut); RTThreadSleep(250);
313	for (i = 0; i < 10000; i++)
314	{
315	uint64_t StartTick = ASMReadTSC();
316	rc = vmmR3DoGCTest(pVM, VMMGC_DO_TESTCASE_INTERRUPT_MASKING, 0);
317	if (rc != VINF_SUCCESS)
318	{
319	RTPrintf("VMM: Interrupt masking failed: rc=%Vrc\n", rc);
320	return rc;
321	}
322	uint64_t Ticks = ASMReadTSC() - StartTick;
323	if (Ticks < (SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) / 10000))
324	RTPrintf("Warning: Ticks=%RU64 (< %RU64)\n", Ticks, SUPGetCpuHzFromGIP(g_pSUPGlobalInfoPage) / 10000);
325	}
326
327	/*
328	* Interrupt forwarding.
329	*/
330	CPUMHyperSetCtxCore(pVM, NULL);
331	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
332	CPUMPushHyper(pVM, 0);
333	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_HYPER_INTERRUPT);
334	CPUMPushHyper(pVM, pVM->pVMGC);
335	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
336	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
337	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
338	Log(("trampoline=%x\n", pVM->vmm.s.pfnGCCallTrampoline));
339
340	/*
341	* Switch and do da thing.
342	*/
343	RTPrintf("VMM: interrupt forwarding...\n"); RTStrmFlush(g_pStdOut); RTThreadSleep(250);
344	i = 0;
345	uint64_t tsBegin = RTTimeNanoTS();
346	uint64_t TickStart = ASMReadTSC();
347	do
348	{
349	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
350	if (VBOX_FAILURE(rc))
351	{
352	Log(("VMM: GC returned fatal %Vra in iteration %d\n", rc, i));
353	VMMR3FatalDump(pVM, rc);
354	return rc;
355	}
356	i++;
357	if (!(i % 32))
358	Log(("VMM: iteration %d, esi=%08x edi=%08x ebx=%08x\n",
359	i, CPUMGetHyperESI(pVM), CPUMGetHyperEDI(pVM), CPUMGetHyperEBX(pVM)));
360	} while (rc == VINF_EM_RAW_INTERRUPT_HYPER);
361	uint64_t TickEnd = ASMReadTSC();
362	uint64_t tsEnd = RTTimeNanoTS();
363
364	uint64_t Elapsed = tsEnd - tsBegin;
365	uint64_t PerIteration = Elapsed / (uint64_t)i;
366	uint64_t cTicksElapsed = TickEnd - TickStart;
367	uint64_t cTicksPerIteration = cTicksElapsed / (uint64_t)i;
368
369	RTPrintf("VMM: %8d interrupts in %11llu ns (%11llu ticks), %10llu ns/iteration (%11llu ticks)\n",
370	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration);
371	Log(("VMM: %8d interrupts in %11llu ns (%11llu ticks), %10llu ns/iteration (%11llu ticks)\n",
372	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration));
373
374	/*
375	* These forced actions are not necessary for the test and trigger breakpoints too.
376	*/
377	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
378	VM_FF_CLEAR(pVM, VM_FF_SELM_SYNC_TSS);
379
380	/*
381	* Profile switching.
382	*/
383	RTPrintf("VMM: profiling switcher...\n");
384	Log(("VMM: profiling switcher...\n"));
385	uint64_t TickMin = ~0;
386	tsBegin = RTTimeNanoTS();
387	TickStart = ASMReadTSC();
388	for (i = 0; i < 1000000; i++)
389	{
390	CPUMHyperSetCtxCore(pVM, NULL);
391	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
392	CPUMPushHyper(pVM, 0);
393	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_NOP);
394	CPUMPushHyper(pVM, pVM->pVMGC);
395	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
396	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
397	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
398
399	uint64_t TickThisStart = ASMReadTSC();
400	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_RAW_RUN, NULL);
401	uint64_t TickThisElapsed = ASMReadTSC() - TickThisStart;
402	if (VBOX_FAILURE(rc))
403	{
404	Log(("VMM: GC returned fatal %Vra in iteration %d\n", rc, i));
405	VMMR3FatalDump(pVM, rc);
406	return rc;
407	}
408	if (TickThisElapsed < TickMin)
409	TickMin = TickThisElapsed;
410	}
411	TickEnd = ASMReadTSC();
412	tsEnd = RTTimeNanoTS();
413
414	Elapsed = tsEnd - tsBegin;
415	PerIteration = Elapsed / (uint64_t)i;
416	cTicksElapsed = TickEnd - TickStart;
417	cTicksPerIteration = cTicksElapsed / (uint64_t)i;
418
419	RTPrintf("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
420	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin);
421	Log(("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
422	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin));
423
424	rc = VINF_SUCCESS;
425	}
426	else
427	AssertMsgFailed(("Failed to resolved VMMGC.gc::VMMGCEntry(), rc=%Vrc\n", rc));
428	#endif
429	return rc;
430	}
431
432	#define SYNC_SEL(pHyperCtx, reg) \
433	if (pHyperCtx->reg) \
434	{ \
435	SELMSELINFO selInfo; \
436	int rc = SELMR3GetShadowSelectorInfo(pVM, pHyperCtx->reg, &selInfo); \
437	AssertRC(rc); \
438	\
439	pHyperCtx->reg##Hid.u32Base = selInfo.GCPtrBase; \
440	pHyperCtx->reg##Hid.u32Limit = selInfo.cbLimit; \
441	pHyperCtx->reg##Hid.Attr.n.u1Present = selInfo.Raw.Gen.u1Present; \
442	pHyperCtx->reg##Hid.Attr.n.u1DefBig = selInfo.Raw.Gen.u1DefBig; \
443	pHyperCtx->reg##Hid.Attr.n.u1Granularity = selInfo.Raw.Gen.u1Granularity; \
444	pHyperCtx->reg##Hid.Attr.n.u4Type = selInfo.Raw.Gen.u4Type; \
445	pHyperCtx->reg##Hid.Attr.n.u2Dpl = selInfo.Raw.Gen.u2Dpl; \
446	pHyperCtx->reg##Hid.Attr.n.u1DescType = selInfo.Raw.Gen.u1DescType; \
447	pHyperCtx->reg##Hid.Attr.n.u1Reserved = selInfo.Raw.Gen.u1Reserved; \
448	}
449
450	/* execute the switch. */
451	VMMR3DECL(int) VMMDoHwAccmTest(PVM pVM)
452	{
453	uint32_t i;
454	int rc;
455	PCPUMCTX pHyperCtx, pGuestCtx;
456	RTGCPHYS CR3Phys = 0x0; /* fake address */
457
458	if (!HWACCMR3IsAllowed(pVM))
459	{
460	RTPrintf("VMM: Hardware accelerated test not available!\n");
461	return VERR_ACCESS_DENIED;
462	}
463
464	/*
465	* These forced actions are not necessary for the test and trigger breakpoints too.
466	*/
467	VM_FF_CLEAR(pVM, VM_FF_TRPM_SYNC_IDT);
468	VM_FF_CLEAR(pVM, VM_FF_SELM_SYNC_TSS);
469
470	/* Enable mapping of the hypervisor into the shadow page table. */
471	PGMR3ChangeShwPDMappings(pVM, true);
472
473	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
474
475	pHyperCtx->cr0 = X86_CR0_PE \| X86_CR0_WP \| X86_CR0_PG \| X86_CR0_TS \| X86_CR0_ET \| X86_CR0_NE \| X86_CR0_MP;
476	pHyperCtx->cr4 = X86_CR4_PGE \| X86_CR4_OSFSXR \| X86_CR4_OSXMMEEXCPT;
477	PGMChangeMode(pVM, pHyperCtx->cr0, pHyperCtx->cr4, 0);
478	PGMSyncCR3(pVM, pHyperCtx->cr0, CR3Phys, pHyperCtx->cr4, true);
479
480	VM_FF_CLEAR(pVM, VM_FF_TO_R3);
481	VM_FF_CLEAR(pVM, VM_FF_TIMER);
482	VM_FF_CLEAR(pVM, VM_FF_REQUEST);
483
484	/*
485	* Setup stack for calling VMMGCEntry().
486	*/
487	RTGCPTR GCPtrEP;
488	rc = PDMR3GetSymbolGC(pVM, VMMGC_MAIN_MODULE_NAME, "VMMGCEntry", &GCPtrEP);
489	if (VBOX_SUCCESS(rc))
490	{
491	RTPrintf("VMM: VMMGCEntry=%VGv\n", GCPtrEP);
492
493	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
494
495	/* Fill in hidden selector registers for the hypervisor state. */
496	SYNC_SEL(pHyperCtx, cs);
497	SYNC_SEL(pHyperCtx, ds);
498	SYNC_SEL(pHyperCtx, es);
499	SYNC_SEL(pHyperCtx, fs);
500	SYNC_SEL(pHyperCtx, gs);
501	SYNC_SEL(pHyperCtx, ss);
502	SYNC_SEL(pHyperCtx, tr);
503
504	/*
505	* Profile switching.
506	*/
507	RTPrintf("VMM: profiling switcher...\n");
508	Log(("VMM: profiling switcher...\n"));
509	uint64_t TickMin = ~0;
510	uint64_t tsBegin = RTTimeNanoTS();
511	uint64_t TickStart = ASMReadTSC();
512	for (i = 0; i < 1000000; i++)
513	{
514	CPUMHyperSetCtxCore(pVM, NULL);
515
516	CPUMSetHyperESP(pVM, pVM->vmm.s.pbGCStackBottom); /* Clear the stack. */
517	CPUMPushHyper(pVM, 0);
518	CPUMPushHyper(pVM, VMMGC_DO_TESTCASE_HWACCM_NOP);
519	CPUMPushHyper(pVM, pVM->pVMGC);
520	CPUMPushHyper(pVM, 3 * sizeof(RTGCPTR)); /* stack frame size */
521	CPUMPushHyper(pVM, GCPtrEP); /* what to call */
522	CPUMSetHyperEIP(pVM, pVM->vmm.s.pfnGCCallTrampoline);
523
524	CPUMQueryHyperCtxPtr(pVM, &pHyperCtx);
525	CPUMQueryGuestCtxPtr(pVM, &pGuestCtx);
526
527	/* Copy the hypervisor context to make sure we have a valid guest context. */
528	pGuestCtx = pHyperCtx;
529	pGuestCtx->cr3 = CR3Phys;
530
531	VM_FF_CLEAR(pVM, VM_FF_TO_R3);
532	VM_FF_CLEAR(pVM, VM_FF_TIMER);
533
534	uint64_t TickThisStart = ASMReadTSC();
535	rc = SUPCallVMMR0(pVM->pVMR0, VMMR0_DO_HWACC_RUN, NULL);
536	uint64_t TickThisElapsed = ASMReadTSC() - TickThisStart;
537	if (VBOX_FAILURE(rc))
538	{
539	Log(("VMM: GC returned fatal %Vra in iteration %d\n", rc, i));
540	VMMR3FatalDump(pVM, rc);
541	return rc;
542	}
543	if (TickThisElapsed < TickMin)
544	TickMin = TickThisElapsed;
545	}
546	uint64_t TickEnd = ASMReadTSC();
547	uint64_t tsEnd = RTTimeNanoTS();
548
549	uint64_t Elapsed = tsEnd - tsBegin;
550	uint64_t PerIteration = Elapsed / (uint64_t)i;
551	uint64_t cTicksElapsed = TickEnd - TickStart;
552	uint64_t cTicksPerIteration = cTicksElapsed / (uint64_t)i;
553
554	RTPrintf("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
555	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin);
556	Log(("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
557	i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin));
558
559	rc = VINF_SUCCESS;
560	}
561	else
562	AssertMsgFailed(("Failed to resolved VMMGC.gc::VMMGCEntry(), rc=%Vrc\n", rc));
563
564	return rc;
565	}
566

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source: vbox/trunk/src/VBox/VMM/VMMTests.cpp@ 2088

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