PGMR0.cpp revision 436b5c616e019c5e62053657c52d3ab5562ecbbf
/* $Id$ */
/** @file
* PGM - Page Manager and Monitor, Ring-0.
*/
/*
* Copyright (C) 2007 Sun Microsystems, Inc.
*
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_PGM
#include <VBox/pgm.h>
#include "PGMInternal.h"
#include <VBox/vm.h>
#include <VBox/log.h>
#include <VBox/err.h>
#include <iprt/assert.h>
__BEGIN_DECLS
#define PGM_BTH_NAME(name) PGM_BTH_NAME_32BIT_PROT(name)
#include "PGMR0Bth.h"
#undef PGM_BTH_NAME
#define PGM_BTH_NAME(name) PGM_BTH_NAME_PAE_PROT(name)
#include "PGMR0Bth.h"
#undef PGM_BTH_NAME
#define PGM_BTH_NAME(name) PGM_BTH_NAME_AMD64_PROT(name)
#include "PGMR0Bth.h"
#undef PGM_BTH_NAME
#define PGM_BTH_NAME(name) PGM_BTH_NAME_EPT_PROT(name)
#include "PGMR0Bth.h"
#undef PGM_BTH_NAME
__END_DECLS
/**
* Worker function for PGMR3PhysAllocateHandyPages and pgmPhysEnsureHandyPage.
*
* @returns The following VBox status codes.
* @retval VINF_SUCCESS on success. FF cleared.
* @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is set in this case.
*
* @param pVM The VM handle.
*
* @remarks Must be called from within the PGM critical section. The caller
* must clear the new pages.
*/
VMMR0DECL(int) PGMR0PhysAllocateHandyPages(PVM pVM)
{
Assert(PDMCritSectIsOwner(&pVM->pgm.s.CritSect));
uint32_t iFirst = pVM->pgm.s.cHandyPages;
AssertMsgReturn(iFirst <= RT_ELEMENTS(pVM->pgm.s.aHandyPages), ("%d", iFirst), VERR_INTERNAL_ERROR);
uint32_t cPages = RT_ELEMENTS(pVM->pgm.s.aHandyPages) - iFirst;
if (!cPages)
return VINF_SUCCESS;
int rc = GMMR0AllocateHandyPages(pVM, cPages, cPages, &pVM->pgm.s.aHandyPages[iFirst]);
if (RT_SUCCESS(rc))
{
for (uint32_t i = 0; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++)
{
Assert(pVM->pgm.s.aHandyPages[i].idPage != NIL_GMM_PAGEID);
Assert(pVM->pgm.s.aHandyPages[i].idPage <= GMM_PAGEID_LAST);
Assert(pVM->pgm.s.aHandyPages[i].idSharedPage == NIL_GMM_PAGEID);
Assert(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys != NIL_RTHCPHYS);
Assert(!(pVM->pgm.s.aHandyPages[i].HCPhysGCPhys & ~X86_PTE_PAE_PG_MASK));
}
pVM->pgm.s.cHandyPages = RT_ELEMENTS(pVM->pgm.s.aHandyPages);
}
LogFlow(("PGMR0PhysAllocateHandyPages: cPages=%d rc=%Rrc\n", cPages, rc));
return rc;
}
/**
* #PF Handler for nested paging.
*
* @returns VBox status code (appropriate for trap handling and GC return).
* @param pVM VM Handle.
* @param enmShwPagingMode Paging mode for the nested page tables
* @param uErr The trap error code.
* @param pRegFrame Trap register frame.
* @param pvFault The fault address.
*/
VMMR0DECL(int) PGMR0Trap0eHandlerNestedPaging(PVM pVM, PGMMODE enmShwPagingMode, RTGCUINT uErr, PCPUMCTXCORE pRegFrame, RTGCPHYS pvFault)
{
int rc;
LogFlow(("PGMTrap0eHandler: uErr=%#x pvFault=%RGp eip=%RGv\n", uErr, pvFault, (RTGCPTR)pRegFrame->rip));
STAM_PROFILE_START(&pVM->pgm.s.StatRZTrap0e, a);
STAM_STATS({ pVM->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = NULL; } );
/* AMD uses the host's paging mode; Intel has a single mode (EPT). */
AssertMsg(enmShwPagingMode == PGMMODE_32_BIT || enmShwPagingMode == PGMMODE_PAE || enmShwPagingMode == PGMMODE_PAE_NX || enmShwPagingMode == PGMMODE_AMD64 || enmShwPagingMode == PGMMODE_AMD64_NX || enmShwPagingMode == PGMMODE_EPT, ("enmShwPagingMode=%d\n", enmShwPagingMode));
#ifdef VBOX_WITH_STATISTICS
/*
* Error code stats.
*/
if (uErr & X86_TRAP_PF_US)
{
if (!(uErr & X86_TRAP_PF_P))
{
if (uErr & X86_TRAP_PF_RW)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSNotPresentWrite);
else
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSNotPresentRead);
}
else if (uErr & X86_TRAP_PF_RW)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSWrite);
else if (uErr & X86_TRAP_PF_RSVD)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSReserved);
else if (uErr & X86_TRAP_PF_ID)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSNXE);
else
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eUSRead);
}
else
{ /* Supervisor */
if (!(uErr & X86_TRAP_PF_P))
{
if (uErr & X86_TRAP_PF_RW)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eSVNotPresentWrite);
else
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eSVNotPresentRead);
}
else if (uErr & X86_TRAP_PF_RW)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eSVWrite);
else if (uErr & X86_TRAP_PF_ID)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eSNXE);
else if (uErr & X86_TRAP_PF_RSVD)
STAM_COUNTER_INC(&pVM->pgm.s.StatRZTrap0eSVReserved);
}
#endif
/*
* Call the worker.
*
* We pretend the guest is in protected mode without paging, so we can use existing code to build the
* nested page tables.
*/
switch(enmShwPagingMode)
{
case PGMMODE_32_BIT:
rc = PGM_BTH_NAME_32BIT_PROT(Trap0eHandler)(pVM, uErr, pRegFrame, pvFault);
break;
case PGMMODE_PAE:
case PGMMODE_PAE_NX:
rc = PGM_BTH_NAME_PAE_PROT(Trap0eHandler)(pVM, uErr, pRegFrame, pvFault);
break;
case PGMMODE_AMD64:
case PGMMODE_AMD64_NX:
rc = PGM_BTH_NAME_AMD64_PROT(Trap0eHandler)(pVM, uErr, pRegFrame, pvFault);
break;
case PGMMODE_EPT:
rc = PGM_BTH_NAME_EPT_PROT(Trap0eHandler)(pVM, uErr, pRegFrame, pvFault);
break;
default:
AssertFailed();
rc = VERR_INVALID_PARAMETER;
break;
}
if (rc == VINF_PGM_SYNCPAGE_MODIFIED_PDE)
rc = VINF_SUCCESS;
STAM_STATS({ if (!pVM->pgm.s.CTX_SUFF(pStatTrap0eAttribution))
pVM->pgm.s.CTX_SUFF(pStatTrap0eAttribution) = &pVM->pgm.s.StatRZTrap0eTime2Misc; });
STAM_PROFILE_STOP_EX(&pVM->pgm.s.StatRZTrap0e, pVM->pgm.s.CTX_SUFF(pStatTrap0eAttribution), a);
return rc;
}