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/* $Id: VMMTests.cpp $ */
/** @file
* VMM - The Virtual Machine Monitor Core, Tests.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
//#define NO_SUPCALLR0VMM
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_VMM
#include <VBox/vmm/vmm.h>
#include <VBox/vmm/pdmapi.h>
#include <VBox/vmm/cpum.h>
#include <VBox/dbg.h>
#include <VBox/vmm/hm.h>
#include <VBox/vmm/mm.h>
#include <VBox/vmm/trpm.h>
#include <VBox/vmm/selm.h>
#include "VMMInternal.h"
#include <VBox/vmm/vm.h>
#include <iprt/errcore.h>
#include <VBox/param.h>
#include <iprt/assert.h>
#include <iprt/asm.h>
#include <iprt/time.h>
#include <iprt/stream.h>
#include <iprt/string.h>
#include <iprt/x86.h>
#define SYNC_SEL(pHyperCtx, reg) \
if (pHyperCtx->reg.Sel) \
{ \
DBGFSELINFO selInfo; \
int rc2 = SELMR3GetShadowSelectorInfo(pVM, pHyperCtx->reg.Sel, &selInfo); \
AssertRC(rc2); \
\
pHyperCtx->reg.u64Base = selInfo.GCPtrBase; \
pHyperCtx->reg.u32Limit = selInfo.cbLimit; \
pHyperCtx->reg.Attr.n.u1Present = selInfo.u.Raw.Gen.u1Present; \
pHyperCtx->reg.Attr.n.u1DefBig = selInfo.u.Raw.Gen.u1DefBig; \
pHyperCtx->reg.Attr.n.u1Granularity = selInfo.u.Raw.Gen.u1Granularity; \
pHyperCtx->reg.Attr.n.u4Type = selInfo.u.Raw.Gen.u4Type; \
pHyperCtx->reg.Attr.n.u2Dpl = selInfo.u.Raw.Gen.u2Dpl; \
pHyperCtx->reg.Attr.n.u1DescType = selInfo.u.Raw.Gen.u1DescType; \
pHyperCtx->reg.Attr.n.u1Long = selInfo.u.Raw.Gen.u1Long; \
}
/* execute the switch. */
VMMR3DECL(int) VMMDoHmTest(PVM pVM)
{
#if 1
RTPrintf("FIXME!\n");
RT_NOREF(pVM);
return 0;
#else
uint32_t i;
int rc;
PCPUMCTX pHyperCtx, pGuestCtx;
RTGCPHYS CR3Phys = 0x0; /* fake address */
PVMCPU pVCpu = &pVM->aCpus[0];
if (!HMIsEnabled(pVM))
{
RTPrintf("VMM: Hardware accelerated test not available!\n");
return VERR_ACCESS_DENIED;
}
/* Enable mapping of the hypervisor into the shadow page table. */
uint32_t cb;
rc = PGMR3MappingsSize(pVM, &cb);
AssertRCReturn(rc, rc);
/* Pretend the mappings are now fixed; to force a refresh of the reserved PDEs. */
rc = PGMR3MappingsFix(pVM, MM_HYPER_AREA_ADDRESS, cb);
AssertRCReturn(rc, rc);
pHyperCtx = CPUMGetHyperCtxPtr(pVCpu);
pHyperCtx->cr0 = X86_CR0_PE | X86_CR0_WP | X86_CR0_PG | X86_CR0_TS | X86_CR0_ET | X86_CR0_NE | X86_CR0_MP;
pHyperCtx->cr4 = X86_CR4_PGE | X86_CR4_OSFXSR | X86_CR4_OSXMMEEXCPT;
PGMChangeMode(pVCpu, pHyperCtx->cr0, pHyperCtx->cr4, pHyperCtx->msrEFER);
PGMSyncCR3(pVCpu, pHyperCtx->cr0, CR3Phys, pHyperCtx->cr4, true);
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TO_R3);
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TIMER);
VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
VM_FF_CLEAR(pVM, VM_FF_REQUEST);
/*
* Setup stack for calling VMMRCEntry().
*/
RTRCPTR RCPtrEP;
rc = PDMR3LdrGetSymbolRC(pVM, VMMRC_MAIN_MODULE_NAME, "VMMRCEntry", &RCPtrEP);
if (RT_SUCCESS(rc))
{
RTPrintf("VMM: VMMRCEntry=%RRv\n", RCPtrEP);
pHyperCtx = CPUMGetHyperCtxPtr(pVCpu);
/* Fill in hidden selector registers for the hypervisor state. */
SYNC_SEL(pHyperCtx, cs);
SYNC_SEL(pHyperCtx, ds);
SYNC_SEL(pHyperCtx, es);
SYNC_SEL(pHyperCtx, fs);
SYNC_SEL(pHyperCtx, gs);
SYNC_SEL(pHyperCtx, ss);
SYNC_SEL(pHyperCtx, tr);
/*
* Profile switching.
*/
RTPrintf("VMM: profiling switcher...\n");
Log(("VMM: profiling switcher...\n"));
uint64_t TickMin = UINT64_MAX;
uint64_t tsBegin = RTTimeNanoTS();
uint64_t TickStart = ASMReadTSC();
for (i = 0; i < 1000000; i++)
{
CPUMSetHyperState(pVCpu, pVM->vmm.s.pfnCallTrampolineRC, pVCpu->vmm.s.pbEMTStackBottomRC, 0, 0);
CPUMPushHyper(pVCpu, 0);
CPUMPushHyper(pVCpu, VMMRC_DO_TESTCASE_HM_NOP);
CPUMPushHyper(pVCpu, pVM->pVMRC);
CPUMPushHyper(pVCpu, 3 * sizeof(RTRCPTR)); /* stack frame size */
CPUMPushHyper(pVCpu, RCPtrEP); /* what to call */
pHyperCtx = CPUMGetHyperCtxPtr(pVCpu);
pGuestCtx = CPUMQueryGuestCtxPtr(pVCpu);
/* Copy the hypervisor context to make sure we have a valid guest context. */
*pGuestCtx = *pHyperCtx;
pGuestCtx->cr3 = CR3Phys;
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TO_R3);
VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_TIMER);
VM_FF_CLEAR(pVM, VM_FF_TM_VIRTUAL_SYNC);
uint64_t TickThisStart = ASMReadTSC();
rc = SUPR3CallVMMR0Fast(pVM->pVMR0, VMMR0_DO_HM_RUN, 0);
uint64_t TickThisElapsed = ASMReadTSC() - TickThisStart;
if (RT_FAILURE(rc))
{
Log(("VMM: R0 returned fatal %Rrc in iteration %d\n", rc, i));
VMMR3FatalDump(pVM, pVCpu, rc);
return rc;
}
if (TickThisElapsed < TickMin)
TickMin = TickThisElapsed;
}
uint64_t TickEnd = ASMReadTSC();
uint64_t tsEnd = RTTimeNanoTS();
uint64_t Elapsed = tsEnd - tsBegin;
uint64_t PerIteration = Elapsed / (uint64_t)i;
uint64_t cTicksElapsed = TickEnd - TickStart;
uint64_t cTicksPerIteration = cTicksElapsed / (uint64_t)i;
RTPrintf("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin);
Log(("VMM: %8d cycles in %11llu ns (%11lld ticks), %10llu ns/iteration (%11lld ticks) Min %11lld ticks\n",
i, Elapsed, cTicksElapsed, PerIteration, cTicksPerIteration, TickMin));
rc = VINF_SUCCESS;
}
else
AssertMsgFailed(("Failed to resolved VMMRC.rc::VMMRCEntry(), rc=%Rrc\n", rc));
return rc;
#endif
}
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