PGMShw.h revision a04fd356c6a066fa94377352c941a49be7ab83b3
/* $Id$ */
/** @file
* VBox - Page Manager / Monitor, Shadow Paging Template.
*/
/*
* 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;
* 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.
*/
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
#if PGM_SHW_TYPE == PGM_TYPE_32BIT
# define SHW_PDE_PG_MASK X86_PDE_PG_MASK
# define SHW_PD_SHIFT X86_PD_SHIFT
# define SHW_PD_MASK X86_PD_MASK
# define SHW_TOTAL_PD_ENTRIES X86_PG_ENTRIES
# define SHW_PTE_PG_MASK X86_PTE_PG_MASK
# define SHW_PT_SHIFT X86_PT_SHIFT
# define SHW_PT_MASK X86_PT_MASK
# define SHW_PDE_PG_MASK EPT_PDE_PG_MASK
# define SHW_PD_SHIFT EPT_PD_SHIFT
# define SHW_PD_MASK EPT_PD_MASK
# define SHW_PTE_PG_MASK EPT_PTE_PG_MASK
# define SHW_PT_SHIFT EPT_PT_SHIFT
# define SHW_PT_MASK EPT_PT_MASK
# define SHW_PDPT_SHIFT EPT_PDPT_SHIFT
# define SHW_PDPT_MASK EPT_PDPT_MASK
# define SHW_PDPE_PG_MASK EPT_PDPE_PG_MASK
#else
# define SHWPT PGMSHWPTPAE
# define PSHWPT PPGMSHWPTPAE
# define SHWPTE PGMSHWPTEPAE
# define PSHWPTE PPGMSHWPTEPAE
# define PSHWPDE PX86PDEPAE
# define SHW_PDE_PG_MASK X86_PDE_PAE_PG_MASK
# define SHW_PD_SHIFT X86_PD_PAE_SHIFT
# define SHW_PD_MASK X86_PD_PAE_MASK
# define SHW_PTE_PG_MASK X86_PTE_PAE_PG_MASK
# define SHW_PT_SHIFT X86_PT_PAE_SHIFT
# define SHW_PT_MASK X86_PT_PAE_MASK
# if PGM_SHW_TYPE == PGM_TYPE_AMD64
# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
# define SHW_PDPT_MASK X86_PDPT_MASK_AMD64
# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
# else /* 32 bits PAE mode */
# define SHW_PDPT_SHIFT X86_PDPT_SHIFT
# define SHW_PDPT_MASK X86_PDPT_MASK_PAE
# define SHW_PDPE_PG_MASK X86_PDPE_PG_MASK
# endif
#endif
/*******************************************************************************
* Internal Functions *
*******************************************************************************/
/* r3 */
/* all */
PGM_SHW_DECL(int, ModifyPage)(PVMCPU pVCpu, RTGCPTR GCPtr, size_t cb, uint64_t fFlags, uint64_t fMask, uint32_t fOpFlags);
/**
* Initializes the guest bit of the paging mode data.
*
* @returns VBox status code.
* @param pVM Pointer to the VM.
* @param fResolveGCAndR0 Indicate whether or not GC and Ring-0 symbols can be resolved now.
* This is used early in the init process to avoid trouble with PDM
* not being initialized yet.
*/
{
/* Ring-3 */
if (fResolveGCAndR0)
{
int rc;
if (!HMIsEnabled(pVM))
{
#if PGM_SHW_TYPE != PGM_TYPE_AMD64 && PGM_SHW_TYPE != PGM_TYPE_NESTED && PGM_SHW_TYPE != PGM_TYPE_EPT /* No AMD64 for traditional virtualization, only VT-x and AMD-V. */
/* GC */
rc = PDMR3LdrGetSymbolRC(pVM, NULL, PGM_SHW_NAME_RC_STR(ModifyPage), &pModeData->pfnRCShwModifyPage);
#endif /* Not AMD64 shadow paging. */
}
/* Ring-0 */
rc = PDMR3LdrGetSymbolR0(pVM, NULL, PGM_SHW_NAME_R0_STR(ModifyPage), &pModeData->pfnR0ShwModifyPage);
}
return VINF_SUCCESS;
}
/**
* Enters the shadow mode.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
* @param fIs64BitsPagingMode New shadow paging mode is for 64 bits? (only relevant for 64 bits guests on a 32 bits AMD-V nested paging host)
*/
{
/* Must distinguish between 32 and 64 bits guest paging modes as we'll use
# else
# endif
int rc = pgmPoolAlloc(pVM, GCPhysCR3, PGMPOOLKIND_ROOT_NESTED, PGMPOOLACCESS_DONTCARE, PGM_A20_IS_ENABLED(pVCpu),
Log(("Enter nested shadow paging mode: root %RHv phys %RHp\n", pVCpu->pgm.s.pShwPageCR3R3, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)->Core.Key));
#else
#endif
return VINF_SUCCESS;
}
/**
* Relocate any GC pointers related to shadow mode paging.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
* @param offDelta The relocation offset.
*/
{
return VINF_SUCCESS;
}
/**
* Exits the shadow mode.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
*/
{
{
/* Do *not* unlock this page as we have two of them floating around in the 32-bit host & 64-bit guest case.
* We currently assert when you try to free one of them; don't bother to really allow this.
*
* Note that this is two nested paging root pages max. This isn't a leak. They are reused.
*/
/* pgmPoolUnlockPage(pPool, pVCpu->pgm.s.CTX_SUFF(pShwPageCR3)); */
Log(("Leave nested shadow paging mode\n"));
}
return VINF_SUCCESS;
}