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/* $Id: tstInt.cpp $ */
/** @file
* SUP Testcase - Test the interrupt gate feature of the support library.
*/
/*
* Copyright (C) 2006-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <VBox/sup.h>
#include <VBox/vmm/vm.h>
#include <VBox/vmm/vmm.h>
#include <VBox/err.h>
#include <VBox/param.h>
#include <iprt/asm-amd64-x86.h>
#include <iprt/initterm.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/alloc.h>
#include <iprt/time.h>
#include <iprt/path.h>
int main(int argc, char **argv)
{
int rcRet = 0;
int i;
int rc;
int cIterations = argc > 1 ? RTStrToUInt32(argv[1]) : 32;
if (cIterations == 0)
cIterations = 64;
/*
* Init.
*/
RTR3InitExe(argc, &argv, 0);
PSUPDRVSESSION pSession;
rc = SUPR3Init(&pSession);
rcRet += rc != 0;
RTPrintf("tstInt: SUPR3Init -> rc=%Rrc\n", rc);
char szFile[RTPATH_MAX];
if (!rc)
{
rc = RTPathExecDir(szFile, sizeof(szFile) - sizeof("/VMMR0.r0"));
}
char szAbsFile[RTPATH_MAX];
if (RT_SUCCESS(rc))
{
strcat(szFile, "/VMMR0.r0");
rc = RTPathAbs(szFile, szAbsFile, sizeof(szAbsFile));
}
if (RT_SUCCESS(rc))
{
/*
* Load VMM code.
*/
rc = SUPR3LoadVMM(szAbsFile);
if (RT_SUCCESS(rc))
{
/*
* Create a fake 'VM'.
*/
PVMR0 pVMR0 = NIL_RTR0PTR;
PVM pVM = NULL;
const unsigned cPages = RT_ALIGN_Z(sizeof(*pVM), PAGE_SIZE) >> PAGE_SHIFT;
PSUPPAGE paPages = (PSUPPAGE)RTMemAllocZ(cPages * sizeof(SUPPAGE));
if (paPages)
rc = SUPR3LowAlloc(cPages, (void **)&pVM, &pVMR0, &paPages[0]);
else
rc = VERR_NO_MEMORY;
if (RT_SUCCESS(rc))
{
pVM->pVMRC = 0;
pVM->pVMR3 = pVM;
pVM->pVMR0 = pVMR0;
pVM->paVMPagesR3 = paPages;
pVM->pSession = pSession;
pVM->enmVMState = VMSTATE_CREATED;
rc = SUPR3SetVMForFastIOCtl(pVMR0);
if (!rc)
{
/*
* Call VMM code with invalid function.
*/
for (i = cIterations; i > 0; i--)
{
rc = SUPR3CallVMMR0(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, NULL);
if (rc != VINF_SUCCESS)
{
RTPrintf("tstInt: SUPR3CallVMMR0 -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
rcRet++;
break;
}
}
RTPrintf("tstInt: Performed SUPR3CallVMMR0 %d times (rc=%Rrc)\n", cIterations, rc);
/*
* The fast path.
*/
if (rc == VINF_SUCCESS)
{
RTTimeNanoTS();
uint64_t StartTS = RTTimeNanoTS();
uint64_t StartTick = ASMReadTSC();
uint64_t MinTicks = UINT64_MAX;
for (i = 0; i < 1000000; i++)
{
uint64_t OneStartTick = ASMReadTSC();
rc = SUPR3CallVMMR0Fast(pVMR0, VMMR0_DO_NOP, 0);
uint64_t Ticks = ASMReadTSC() - OneStartTick;
if (Ticks < MinTicks)
MinTicks = Ticks;
if (RT_UNLIKELY(rc != VINF_SUCCESS))
{
RTPrintf("tstInt: SUPR3CallVMMR0Fast -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
rcRet++;
break;
}
}
uint64_t Ticks = ASMReadTSC() - StartTick;
uint64_t NanoSecs = RTTimeNanoTS() - StartTS;
RTPrintf("tstInt: SUPR3CallVMMR0Fast - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
/*
* The ordinary path.
*/
RTTimeNanoTS();
StartTS = RTTimeNanoTS();
StartTick = ASMReadTSC();
MinTicks = UINT64_MAX;
for (i = 0; i < 1000000; i++)
{
uint64_t OneStartTick = ASMReadTSC();
rc = SUPR3CallVMMR0Ex(pVMR0, NIL_VMCPUID, VMMR0_DO_SLOW_NOP, 0, NULL);
uint64_t OneTicks = ASMReadTSC() - OneStartTick;
if (OneTicks < MinTicks)
MinTicks = OneTicks;
if (RT_UNLIKELY(rc != VINF_SUCCESS))
{
RTPrintf("tstInt: SUPR3CallVMMR0Ex -> rc=%Rrc i=%d Expected VINF_SUCCESS!\n", rc, i);
rcRet++;
break;
}
}
Ticks = ASMReadTSC() - StartTick;
NanoSecs = RTTimeNanoTS() - StartTS;
RTPrintf("tstInt: SUPR3CallVMMR0Ex - %d iterations in %llu ns / %llu ticks. %llu ns / %#llu ticks per iteration. Min %llu ticks.\n",
i, NanoSecs, Ticks, NanoSecs / i, Ticks / i, MinTicks);
}
}
else
{
RTPrintf("tstInt: SUPR3SetVMForFastIOCtl failed: %Rrc\n", rc);
rcRet++;
}
}
else
{
RTPrintf("tstInt: SUPR3ContAlloc(%#zx,,) failed\n", sizeof(*pVM));
rcRet++;
}
/*
* Unload VMM.
*/
rc = SUPR3UnloadVMM();
if (rc)
{
RTPrintf("tstInt: SUPR3UnloadVMM failed with rc=%Rrc\n", rc);
rcRet++;
}
}
else
{
RTPrintf("tstInt: SUPR3LoadVMM failed with rc=%Rrc\n", rc);
rcRet++;
}
/*
* Terminate.
*/
rc = SUPR3Term(false /*fForced*/);
rcRet += rc != 0;
RTPrintf("tstInt: SUPR3Term -> rc=%Rrc\n", rc);
}
return !!rc;
}
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