memobj-r0drv-linux.c revision cc6fd9f4976d8d400b829ec002aced4cca2c11d7
f86f2dc613a22ee06add9b878197922466df641bvboxsync/* $Revision$ */
f86f2dc613a22ee06add9b878197922466df641bvboxsync/** @file
f86f2dc613a22ee06add9b878197922466df641bvboxsync * innotek Portable Runtime - Ring-0 Memory Objects, Linux.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/*
40c9dcdf4b9d1c60dc67fa671b7a689b3c0f84d4vboxsync * Copyright (C) 2006-2007 innotek GmbH
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
f86f2dc613a22ee06add9b878197922466df641bvboxsync * available from http://www.virtualbox.org. This file is free software;
f86f2dc613a22ee06add9b878197922466df641bvboxsync * you can redistribute it and/or modify it under the terms of the GNU
f86f2dc613a22ee06add9b878197922466df641bvboxsync * General Public License (GPL) as published by the Free Software
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
f86f2dc613a22ee06add9b878197922466df641bvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
f86f2dc613a22ee06add9b878197922466df641bvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * The contents of this file may alternatively be used under the terms
f86f2dc613a22ee06add9b878197922466df641bvboxsync * of the Common Development and Distribution License Version 1.0
f86f2dc613a22ee06add9b878197922466df641bvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
f86f2dc613a22ee06add9b878197922466df641bvboxsync * VirtualBox OSE distribution, in which case the provisions of the
f86f2dc613a22ee06add9b878197922466df641bvboxsync * CDDL are applicable instead of those of the GPL.
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync *
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * You may elect to license modified versions of this file under the
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * terms and conditions of either the GPL or the CDDL or both.
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync */
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync/*******************************************************************************
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync* Header Files *
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync*******************************************************************************/
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync#include "the-linux-kernel.h"
40c9dcdf4b9d1c60dc67fa671b7a689b3c0f84d4vboxsync
40c9dcdf4b9d1c60dc67fa671b7a689b3c0f84d4vboxsync#include <iprt/memobj.h>
40c9dcdf4b9d1c60dc67fa671b7a689b3c0f84d4vboxsync#include <iprt/alloc.h>
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync#include <iprt/assert.h>
f86f2dc613a22ee06add9b878197922466df641bvboxsync#include <iprt/log.h>
f86f2dc613a22ee06add9b878197922466df641bvboxsync#include <iprt/string.h>
f86f2dc613a22ee06add9b878197922466df641bvboxsync#include <iprt/process.h>
f86f2dc613a22ee06add9b878197922466df641bvboxsync#include "internal/memobj.h"
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/* early 2.6 kernels */
f86f2dc613a22ee06add9b878197922466df641bvboxsync#ifndef PAGE_SHARED_EXEC
f86f2dc613a22ee06add9b878197922466df641bvboxsync# define PAGE_SHARED_EXEC PAGE_SHARED
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync#ifndef PAGE_READONLY_EXEC
f86f2dc613a22ee06add9b878197922466df641bvboxsync# define PAGE_READONLY_EXEC PAGE_READONLY
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync#endif
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync/*******************************************************************************
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync* Structures and Typedefs *
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync*******************************************************************************/
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync/**
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * The Darwin version of the memory object structure.
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync */
2a047f0d7ee5964456dbc4dec9925031482588abvboxsynctypedef struct RTR0MEMOBJLNX
97dc19418e21b4b87280756668cf171a4332e498vboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** The core structure. */
40c9dcdf4b9d1c60dc67fa671b7a689b3c0f84d4vboxsync RTR0MEMOBJINTERNAL Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** Set if the allocation is contiguous.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * This means it has to be given back as one chunk. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync bool fContiguous;
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** Set if we've vmap'ed thed memory into ring-0. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync bool fMappedToRing0;
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** The pages in the apPages array. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t cPages;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync /** Array of struct page pointers. (variable size) */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync struct page *apPages[1];
8300beb17e7c288655895d07bfdc58a01f618218vboxsync} RTR0MEMOBJLNX, *PRTR0MEMOBJLNX;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync/**
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Helper that converts from a RTR0PROCESS handle to a linux task.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync *
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @returns The corresponding Linux task.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param R0Process IPRT ring-0 process handle.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncstruct task_struct *rtR0ProcessToLinuxTask(RTR0PROCESS R0Process)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /** @todo fix rtR0ProcessToLinuxTask!! */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return R0Process == RTR0ProcHandleSelf() ? current : NULL;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Compute order. Some functions allocate 2^order pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @returns order.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param cPages Number of pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic int rtR0MemObjLinuxOrder(size_t cPages)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync int iOrder;
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t cTmp;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iOrder = 0, cTmp = cPages; cTmp >>= 1; ++iOrder)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync ;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (cPages & ~((size_t)1 << iOrder))
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync ++iOrder;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return iOrder;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Converts from RTMEM_PROT_* to Linux PAGE_*.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @returns Linux page protection constant.
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync * @param fProt The IPRT protection mask.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param fKernel Whether it applies to kernel or user space.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncstatic pgprot_t rtR0MemObjLinuxConvertProt(unsigned fProt, bool fKernel)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync switch (fProt)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync default:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync AssertMsgFailed(("%#x %d\n", fProt, fKernel));
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_NONE:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return PAGE_NONE;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_READ:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return fKernel ? PAGE_KERNEL_RO : PAGE_READONLY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_WRITE:
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTMEM_PROT_WRITE | RTMEM_PROT_READ:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return fKernel ? PAGE_KERNEL : PAGE_SHARED;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_EXEC:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_EXEC | RTMEM_PROT_READ:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#if defined(RT_ARCH_X86) || defined(RT_ARCH_AMD64)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (fKernel)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pgprot_t fPg = MY_PAGE_KERNEL_EXEC;
f86f2dc613a22ee06add9b878197922466df641bvboxsync pgprot_val(fPg) &= ~_PAGE_RW;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync return fPg;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return PAGE_READONLY_EXEC;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#else
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return fKernel ? MY_PAGE_KERNEL_EXEC : PAGE_READONLY_EXEC;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#endif
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_WRITE | RTMEM_PROT_EXEC:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync case RTMEM_PROT_WRITE | RTMEM_PROT_EXEC | RTMEM_PROT_READ:
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return fKernel ? MY_PAGE_KERNEL_EXEC : PAGE_SHARED_EXEC;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync/**
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * Internal worker that allocates physical pages and creates the memory object for them.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync *
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * @returns IPRT status code.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param ppMemLnx Where to store the memory object pointer.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param enmType The object type.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param cb The number of bytes to allocate.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param fFlagsLnx The page allocation flags (GPFs).
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param fContiguous Whether the allocation must be contiguous.
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncstatic int rtR0MemObjLinuxAllocPages(PRTR0MEMOBJLNX *ppMemLnx, RTR0MEMOBJTYPE enmType, size_t cb, unsigned fFlagsLnx, bool fContiguous)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync size_t iPage;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync size_t cPages = cb >> PAGE_SHIFT;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync struct page *paPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Allocate a memory object structure that's large enough to contain
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * the page pointer array.
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync */
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync PRTR0MEMOBJLNX pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJLNX, apPages[cPages]), enmType, NULL, cb);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (!pMemLnx)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync return VERR_NO_MEMORY;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync pMemLnx->cPages = cPages;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Allocate the pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * For small allocations we'll try contiguous first and then fall back on page by page.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync if ( fContiguous
f86f2dc613a22ee06add9b878197922466df641bvboxsync || cb <= PAGE_SIZE * 2)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync paPages = alloc_pages(fFlagsLnx, rtR0MemObjLinuxOrder(cb >> PAGE_SHIFT));
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (paPages)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync fContiguous = true;
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++)
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->apPages[iPage] = &paPages[iPage];
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else if (fContiguous)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!fContiguous)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->apPages[iPage] = alloc_page(fFlagsLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_UNLIKELY(!pMemLnx->apPages[iPage]))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync __free_page(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* < 2.4.22 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** @todo figure out why we didn't allocate page-by-page on 2.4.21 and older... */
f86f2dc613a22ee06add9b878197922466df641bvboxsync paPages = alloc_pages(fFlagsLnx, rtR0MemObjLinuxOrder(cb >> PAGE_SHIFT));
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!paPages)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx->apPages[iPage] = &paPages[iPage];
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL))
f86f2dc613a22ee06add9b878197922466df641bvboxsync MY_CHANGE_PAGE_ATTR(pMemLnx->apPages[iPage], 1, MY_PAGE_KERNEL_EXEC);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (PageHighMem(pMemLnx->apPages[iPage]))
f86f2dc613a22ee06add9b878197922466df641bvboxsync BUG();
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync fContiguous = true;
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif /* < 2.4.22 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->fContiguous = fContiguous;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Reserve the pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++)
f86f2dc613a22ee06add9b878197922466df641bvboxsync SetPageReserved(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMemLnx = pMemLnx;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VINF_SUCCESS;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Frees the physical pages allocated by the rtR0MemObjLinuxAllocPages() call.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * This method does NOT free the object.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param pMemLnx The object which physical pages should be freed.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic void rtR0MemObjLinuxFreePages(PRTR0MEMOBJLNX pMemLnx)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage = pMemLnx->cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (iPage > 0)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Restore the page flags.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync ClearPageReserved(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL))
f86f2dc613a22ee06add9b878197922466df641bvboxsync MY_CHANGE_PAGE_ATTR(pMemLnx->apPages[iPage], 1, PAGE_KERNEL);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Free the pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pMemLnx->fContiguous)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync iPage = pMemLnx->cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync __free_page(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync __free_pages(pMemLnx->apPages[0], rtR0MemObjLinuxOrder(pMemLnx->cPages));
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->cPages = 0;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Maps the allocation into ring-0.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * This will update the RTR0MEMOBJLNX::Core.pv and RTR0MEMOBJ::fMappedToRing0 members.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Contiguous mappings that isn't in 'high' memory will already be mapped into kernel
f86f2dc613a22ee06add9b878197922466df641bvboxsync * space, so we'll use that mapping if possible. If execute access is required, we'll
f86f2dc613a22ee06add9b878197922466df641bvboxsync * play safe and do our own mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @returns IPRT status code.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param pMemLnx The linux memory object to map.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param fExecutable Whether execute access is required.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic int rtR0MemObjLinuxVMap(PRTR0MEMOBJLNX pMemLnx, bool fExecutable)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync int rc = VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Choose mapping strategy.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync bool fMustMap = fExecutable
f86f2dc613a22ee06add9b878197922466df641bvboxsync || !pMemLnx->fContiguous;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!fMustMap)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync {
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync size_t iPage = pMemLnx->cPages;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync while (iPage-- > 0)
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync if (PageHighMem(pMemLnx->apPages[iPage]))
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync {
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync fMustMap = true;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync break;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync }
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync }
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync Assert(!pMemLnx->Core.pv);
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync Assert(!pMemLnx->fMappedToRing0);
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync if (fMustMap)
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync {
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync /*
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync * Use vmap - 2.4.22 and later.
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync */
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync pgprot_t fPg;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync pgprot_val(fPg) = _PAGE_PRESENT | _PAGE_RW;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync# ifdef _PAGE_NX
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync if (!fExecutable)
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync pgprot_val(fPg) |= _PAGE_NX;
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync# ifdef VM_MAP
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = vmap(&pMemLnx->apPages[0], pMemLnx->cPages, VM_MAP, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# else
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = vmap(&pMemLnx->apPages[0], pMemLnx->cPages, VM_ALLOC, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->Core.pv)
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->fMappedToRing0 = true;
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VERR_MAP_FAILED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* < 2.4.22 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VERR_NOT_SUPPORTED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Use the kernel RAM mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = phys_to_virt(page_to_phys(pMemLnx->apPages[0]));
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Undos what rtR0MemObjLinuxVMap() did.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param pMemLnx The linux memory object.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic void rtR0MemObjLinuxVUnmap(PRTR0MEMOBJLNX pMemLnx)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->fMappedToRing0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync vunmap(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->fMappedToRing0 = false;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#else /* < 2.4.22 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(!pMemLnx->fMappedToRing0);
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = NULL;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx = (PRTR0MEMOBJLNX)pMem;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Release any memory that we've allocated or locked.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync switch (pMemLnx->Core.enmType)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync case RTR0MEMOBJTYPE_LOW:
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_PAGE:
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_CONT:
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_PHYS:
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_PHYS_NC:
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxVUnmap(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxFreePages(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_LOCK:
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage;
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(pMemLnx->Core.u.Lock.R0Process);
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pTask);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pTask && pTask->mm)
f86f2dc613a22ee06add9b878197922466df641bvboxsync down_read(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync iPage = pMemLnx->cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!PageReserved(pMemLnx->apPages[iPage]))
f86f2dc613a22ee06add9b878197922466df641bvboxsync SetPageDirty(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync page_cache_release(pMemLnx->apPages[iPage]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pTask && pTask->mm)
f86f2dc613a22ee06add9b878197922466df641bvboxsync up_read(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertFailed(); /* not implemented for R0 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_RES_VIRT:
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->Core.u.ResVirt.R0Process != NIL_RTR0PROCESS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(pMemLnx->Core.u.Lock.R0Process);
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pTask);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pTask && pTask->mm)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync down_write(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync MY_DO_MUNMAP(pTask->mm, (unsigned long)pMemLnx->Core.pv, pMemLnx->Core.cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync up_write(&pTask->mm->mmap_sem);
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync }
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync vunmap(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync Assert(pMemLnx->cPages == 1 && pMemLnx->apPages[0] != NULL);
f86f2dc613a22ee06add9b878197922466df641bvboxsync __free_page(pMemLnx->apPages[0]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->apPages[0] = NULL;
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->cPages = 0;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = NULL;
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync case RTR0MEMOBJTYPE_MAPPING:
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnx->cPages == 0); Assert(pMemLnx->Core.pv);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (pMemLnx->Core.u.ResVirt.R0Process != NIL_RTR0PROCESS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(pMemLnx->Core.u.Lock.R0Process);
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pTask);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pTask && pTask->mm)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync down_write(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync MY_DO_MUNMAP(pTask->mm, (unsigned long)pMemLnx->Core.pv, pMemLnx->Core.cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync up_write(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync vunmap(pMemLnx->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = NULL;
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync default:
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertMsgFailed(("enmType=%d\n", pMemLnx->Core.enmType));
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_INTERNAL_ERROR;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VINF_SUCCESS;
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx;
f86f2dc613a22ee06add9b878197922466df641bvboxsync int rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_PAGE, cb, GFP_HIGHUSER, false /* non-contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_PAGE, cb, GFP_USER, false /* non-contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxVMap(pMemLnx, fExecutable);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxFreePages(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx;
f86f2dc613a22ee06add9b878197922466df641bvboxsync int rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#ifdef RT_ARCH_AMD64
f86f2dc613a22ee06add9b878197922466df641bvboxsync# ifdef GFP_DMA32
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_LOW, cb, GFP_DMA32, false /* non-contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_FAILURE(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_LOW, cb, GFP_DMA, false /* non-contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_LOW, cb, GFP_USER, false /* non-contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxVMap(pMemLnx, fExecutable);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxFreePages(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync int rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#ifdef RT_ARCH_AMD64
f86f2dc613a22ee06add9b878197922466df641bvboxsync# ifdef GFP_DMA32
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_CONT, cb, GFP_DMA32, true /* contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_FAILURE(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_CONT, cb, GFP_DMA, true /* contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, RTR0MEMOBJTYPE_CONT, cb, GFP_USER, true /* contiguous */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxVMap(pMemLnx, fExecutable);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync#ifdef RT_STRICT
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage = pMemLnx->cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(page_to_phys(pMemLnx->apPages[iPage]) < _4G);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Cont.Phys = page_to_phys(pMemLnx->apPages[0]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxFreePages(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync * Worker for rtR0MemObjLinuxAllocPhysSub that tries one allocation strategy.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync *
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @returns IPRT status.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param ppMemLnx Where to
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param enmType The object type.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param cb The size of the allocation.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param PhysHighest See rtR0MemObjNativeAllocPhys.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * @param fGfp The Linux GFP flags to use for the allocation.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncstatic int rtR0MemObjLinuxAllocPhysSub2(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJTYPE enmType, size_t cb, RTHCPHYS PhysHighest, unsigned fGfp)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnx;
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync int rc;
6af5a377dcdc4437fa51e183a5a8dad78abf2ec0vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = rtR0MemObjLinuxAllocPages(&pMemLnx, enmType, cb, fGfp,
f86f2dc613a22ee06add9b878197922466df641bvboxsync enmType == RTR0MEMOBJTYPE_PHYS /* contiguous / non-contiguous */);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (RT_FAILURE(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Check the addresses if necessary. (Can be optimized a bit for PHYS.)
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (PhysHighest != NIL_RTHCPHYS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage = pMemLnx->cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (page_to_phys(pMemLnx->apPages[iPage]) >= PhysHighest)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjLinuxFreePages(pMemLnx);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Complete the object.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (enmType == RTR0MEMOBJTYPE_PHYS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Phys.PhysBase = page_to_phys(pMemLnx->apPages[0]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Phys.fAllocated = true;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Worker for rtR0MemObjNativeAllocPhys and rtR0MemObjNativeAllocPhysNC.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @returns IPRT status.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param ppMem Where to store the memory object pointer on success.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param enmType The object type.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param cb The size of the allocation.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param PhysHighest See rtR0MemObjNativeAllocPhys.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic int rtR0MemObjLinuxAllocPhysSub(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJTYPE enmType, size_t cb, RTHCPHYS PhysHighest)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync int rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * There are two clear cases and that's the <=16MB and anything-goes ones.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * When the physical address limit is somewhere inbetween those two we'll
f86f2dc613a22ee06add9b878197922466df641bvboxsync * just have to try, starting with HIGHUSER and working our way thru the
f86f2dc613a22ee06add9b878197922466df641bvboxsync * different types, hoping we'll get lucky.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * We should probably move this physical address restriction logic up to
f86f2dc613a22ee06add9b878197922466df641bvboxsync * the page alloc function as it would be more efficient there. But since
f86f2dc613a22ee06add9b878197922466df641bvboxsync * we don't expect this to be a performance issue just yet it can wait.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (PhysHighest == NIL_RTHCPHYS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_HIGHUSER);
f86f2dc613a22ee06add9b878197922466df641bvboxsync else if (PhysHighest <= _1M * 16)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_DMA);
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_FAILURE(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_HIGHUSER);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_FAILURE(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_USER);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#ifdef GFP_DMA32
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (RT_FAILURE(rc))
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_DMA32);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#endif
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (RT_FAILURE(rc))
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = rtR0MemObjLinuxAllocPhysSub2(ppMem, enmType, cb, PhysHighest, GFP_DMA);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return rc;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsyncint rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return rtR0MemObjLinuxAllocPhysSub(ppMem, RTR0MEMOBJTYPE_PHYS, cb, PhysHighest);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncint rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return rtR0MemObjLinuxAllocPhysSub(ppMem, RTR0MEMOBJTYPE_PHYS_NC, cb, PhysHighest);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncint rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * All we need to do here is to validate that we can use
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * ioremap on the specified address (32/64-bit dma_addr_t).
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnx;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync dma_addr_t PhysAddr = Phys;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync AssertMsgReturn(PhysAddr == Phys, ("%#llx\n", (unsigned long long)Phys), VERR_ADDRESS_TOO_BIG);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(sizeof(*pMemLnx), RTR0MEMOBJTYPE_PHYS, NULL, cb);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (!pMemLnx)
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync return VERR_NO_MEMORY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx->Core.u.Phys.PhysBase = PhysAddr;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx->Core.u.Phys.fAllocated = false;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync Assert(!pMemLnx->cPages);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync *ppMem = &pMemLnx->Core;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return VINF_SUCCESS;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncint rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, RTR0PROCESS R0Process)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync const int cPages = cb >> PAGE_SHIFT;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(R0Process);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync struct vm_area_struct **papVMAs;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnx;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync int rc = VERR_NO_MEMORY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Check for valid task and size overflows.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pTask)
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NOT_SUPPORTED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (((size_t)cPages << PAGE_SHIFT) != cb)
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_OUT_OF_RANGE;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Allocate the memory object and a temporary buffer for the VMAs.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJLNX, apPages[cPages]), RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pMemLnx)
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync papVMAs = (struct vm_area_struct **)RTMemAlloc(sizeof(*papVMAs) * cPages);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (papVMAs)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync down_read(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Get user pages.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = get_user_pages(pTask, /* Task for fault acounting. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pTask->mm, /* Whose pages. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync R3Ptr, /* Where from. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync cPages, /* How many pages. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync 1, /* Write to memory. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync 0, /* force. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync &pMemLnx->apPages[0], /* Page array. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync papVMAs); /* vmas */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (rc == cPages)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Flush dcache (required?) and protect against fork.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** @todo The Linux fork() protection will require more work if this API
f86f2dc613a22ee06add9b878197922466df641bvboxsync * is to be used for anything but locking VM pages. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (rc-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync flush_dcache_page(pMemLnx->apPages[rc]);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync papVMAs[rc]->vm_flags |= VM_DONTCOPY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync up_read(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync RTMemFree(papVMAs);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Lock.R0Process = R0Process;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync pMemLnx->cPages = cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(!pMemLnx->fMappedToRing0);
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync return VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Failed - we need to unlock any pages that we succeeded to lock.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (rc-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!PageReserved(pMemLnx->apPages[rc]))
f86f2dc613a22ee06add9b878197922466df641bvboxsync SetPageDirty(pMemLnx->apPages[rc]);
f86f2dc613a22ee06add9b878197922466df641bvboxsync page_cache_release(pMemLnx->apPages[rc]);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync up_read(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync RTMemFree(papVMAs);
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VERR_LOCK_FAILED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync /* What is there to lock? Should/Can we fake this? */
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NOT_SUPPORTED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
f86f2dc613a22ee06add9b878197922466df641bvboxsync const size_t cPages = cb >> PAGE_SHIFT;
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct page *pDummyPage;
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct page **papPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /* check for unsupported stuff. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertMsgReturn(uAlignment <= PAGE_SIZE, ("%#x\n", uAlignment), VERR_NOT_SUPPORTED);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Allocate a dummy page and create a page pointer array for vmap such that
f86f2dc613a22ee06add9b878197922466df641bvboxsync * the dummy page is mapped all over the reserved area.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pDummyPage = alloc_page(GFP_HIGHUSER);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pDummyPage)
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync papPages = RTMemAlloc(sizeof(*papPages) * cPages);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (papPages)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync void *pv;
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage = cPages;
f86f2dc613a22ee06add9b878197922466df641bvboxsync while (iPage-- > 0)
f86f2dc613a22ee06add9b878197922466df641bvboxsync papPages[iPage] = pDummyPage;
f86f2dc613a22ee06add9b878197922466df641bvboxsync# ifdef VM_MAP
f86f2dc613a22ee06add9b878197922466df641bvboxsync pv = vmap(papPages, cPages, VM_MAP, PAGE_KERNEL_RO);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# else
f86f2dc613a22ee06add9b878197922466df641bvboxsync pv = vmap(papPages, cPages, VM_ALLOC, PAGE_KERNEL_RO);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync RTMemFree(papPages);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pv)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(sizeof(*pMemLnx), RTR0MEMOBJTYPE_RES_VIRT, pv, cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.ResVirt.R0Process = NIL_RTR0PROCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->cPages = 1;
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->apPages[0] = pDummyPage;
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync vunmap(pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync __free_page(pDummyPage);
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* < 2.4.22 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Could probably use ioremap here, but the caller is in a better position than us
f86f2dc613a22ee06add9b878197922466df641bvboxsync * to select some safe physical memory.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NOT_SUPPORTED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
ccc948c886b751603889a67909fbd4a5fcaeac85vboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync/**
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Worker for rtR0MemObjNativeReserveUser and rtR0MemObjNativerMapUser that creates
f86f2dc613a22ee06add9b878197922466df641bvboxsync * an empty user space mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * The caller takes care of acquiring the mmap_sem of the task.
f86f2dc613a22ee06add9b878197922466df641bvboxsync *
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @returns Pointer to the mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * (void *)-1 on failure.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param R3PtrFixed (RTR3PTR)-1 if anywhere, otherwise a specific location.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param cb The size of the mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param uAlignment The alignment of the mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param pTask The Linux task to create this mapping in.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * @param fProt The RTMEM_PROT_* mask.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsyncstatic void *rtR0MemObjLinuxDoMmap(RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, struct task_struct *pTask, unsigned fProt)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync unsigned fLnxProt;
f86f2dc613a22ee06add9b878197922466df641bvboxsync unsigned long ulAddr;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Convert from IPRT protection to mman.h PROT_ and call do_mmap.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync fProt &= (RTMEM_PROT_NONE | RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (fProt == RTMEM_PROT_NONE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync fLnxProt = PROT_NONE;
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync fLnxProt = 0;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (fProt & RTMEM_PROT_READ)
f86f2dc613a22ee06add9b878197922466df641bvboxsync fLnxProt |= PROT_READ;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (fProt & RTMEM_PROT_WRITE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync fLnxProt |= PROT_WRITE;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (fProt & RTMEM_PROT_EXEC)
f86f2dc613a22ee06add9b878197922466df641bvboxsync fLnxProt |= PROT_EXEC;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (R3PtrFixed != (RTR3PTR)-1)
f86f2dc613a22ee06add9b878197922466df641bvboxsync ulAddr = do_mmap(NULL, R3PtrFixed, cb, fLnxProt, MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, 0);
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync ulAddr = do_mmap(NULL, 0, cb, fLnxProt, MAP_SHARED | MAP_ANONYMOUS, 0);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if ( !(ulAddr & ~PAGE_MASK)
f86f2dc613a22ee06add9b878197922466df641bvboxsync && (ulAddr & (uAlignment - 1)))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** @todo implement uAlignment properly... We'll probably need to make some dummy mappings to fill
f86f2dc613a22ee06add9b878197922466df641bvboxsync * up alignment gaps. This is of course complicated by fragmentation (which we might have cause
f86f2dc613a22ee06add9b878197922466df641bvboxsync * ourselves) and further by there begin two mmap strategies (top / bottom). */
f86f2dc613a22ee06add9b878197922466df641bvboxsync /* For now, just ignore uAlignment requirements... */
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (ulAddr & ~PAGE_MASK) /* ~PAGE_MASK == PAGE_OFFSET_MASK */
f86f2dc613a22ee06add9b878197922466df641bvboxsync return (void *)-1;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return (void *)ulAddr;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncint rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnx;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync void *pv;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(R0Process);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (!pTask)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return VERR_NOT_SUPPORTED;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Let rtR0MemObjLinuxDoMmap do the difficult bits.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync down_write(&pTask->mm->mmap_sem);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pv = rtR0MemObjLinuxDoMmap(R3PtrFixed, cb, uAlignment, pTask, RTMEM_PROT_NONE);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync up_write(&pTask->mm->mmap_sem);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (pv == (void *)-1)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return VERR_NO_MEMORY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(sizeof(*pMemLnx), RTR0MEMOBJTYPE_RES_VIRT, pv, cb);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (!pMemLnx)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync down_write(&pTask->mm->mmap_sem);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync MY_DO_MUNMAP(pTask->mm, (unsigned long)pv, cb);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync up_write(&pTask->mm->mmap_sem);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return VERR_NO_MEMORY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx->Core.u.ResVirt.R0Process = R0Process;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync *ppMem = &pMemLnx->Core;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync return VINF_SUCCESS;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync}
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsyncint rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment, unsigned fProt)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync{
8300beb17e7c288655895d07bfdc58a01f618218vboxsync int rc = VERR_NO_MEMORY;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnxToMap = (PRTR0MEMOBJLNX)pMemToMap;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync PRTR0MEMOBJLNX pMemLnx;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /* Fail if requested to do something we can't. */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync AssertMsgReturn(uAlignment <= PAGE_SIZE, ("%#x\n", uAlignment), VERR_NOT_SUPPORTED);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Create the IPRT memory object.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(sizeof(*pMemLnx), RTR0MEMOBJTYPE_MAPPING, NULL, pMemLnxToMap->Core.cb);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (pMemLnx)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (pMemLnxToMap->cPages)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 22)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Use vmap - 2.4.22 and later.
8300beb17e7c288655895d07bfdc58a01f618218vboxsync */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pgprot_t fPg = rtR0MemObjLinuxConvertProt(fProt, true /* kernel */);
8300beb17e7c288655895d07bfdc58a01f618218vboxsync# ifdef VM_MAP
8300beb17e7c288655895d07bfdc58a01f618218vboxsync pMemLnx->Core.pv = vmap(&pMemLnxToMap->apPages[0], pMemLnxToMap->cPages, VM_MAP, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# else
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = vmap(&pMemLnxToMap->apPages[0], pMemLnxToMap->cPages, VM_ALLOC, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync# endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->Core.pv)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->fMappedToRing0 = true;
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VERR_MAP_FAILED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* < 2.4.22 */
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Only option here is to share mappings if possible and forget about fProt.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (rtR0MemObjIsRing3(pMemToMap))
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = VERR_NOT_SUPPORTED;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync else
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync rc = VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pMemLnxToMap->Core.pv)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = rtR0MemObjLinuxVMap(pMemLnxToMap, !!(fProt & RTMEM_PROT_EXEC));
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnxToMap->Core.pv);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = pMemLnxToMap->Core.pv;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * MMIO / physical memory.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync Assert(pMemLnxToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS && !pMemLnxToMap->Core.u.Phys.fAllocated);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = ioremap(pMemLnxToMap->Core.u.Phys.PhysBase, pMemLnxToMap->Core.cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx->Core.pv)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /** @todo fix protection. */
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = VINF_SUCCESS;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (RT_SUCCESS(rc))
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VINF_SUCCESS;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync rtR0MemObjDelete(&pMemLnx->Core);
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync return rc;
f86f2dc613a22ee06add9b878197922466df641bvboxsync}
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsyncint rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
f86f2dc613a22ee06add9b878197922466df641bvboxsync{
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct task_struct *pTask = rtR0ProcessToLinuxTask(R0Process);
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnxToMap = (PRTR0MEMOBJLNX)pMemToMap;
f86f2dc613a22ee06add9b878197922466df641bvboxsync int rc = VERR_NO_MEMORY;
f86f2dc613a22ee06add9b878197922466df641bvboxsync PRTR0MEMOBJLNX pMemLnx;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Check for restrictions.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!pTask)
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VERR_NOT_SUPPORTED;
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Create the IPRT memory object.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx = (PRTR0MEMOBJLNX)rtR0MemObjNew(sizeof(*pMemLnx), RTR0MEMOBJTYPE_MAPPING, NULL, pMemLnxToMap->Core.cb);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnx)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Allocate user space mapping.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync void *pv;
f86f2dc613a22ee06add9b878197922466df641bvboxsync down_write(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync pv = rtR0MemObjLinuxDoMmap(R3PtrFixed, pMemLnxToMap->Core.cb, uAlignment, pTask, fProt);
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pv != (void *)-1)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
8300beb17e7c288655895d07bfdc58a01f618218vboxsync * Map page by page into the mmap area.
f86f2dc613a22ee06add9b878197922466df641bvboxsync * This is generic, paranoid and not very efficient.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync pgprot_t fPg = rtR0MemObjLinuxConvertProt(fProt, false /* user */);
f86f2dc613a22ee06add9b878197922466df641bvboxsync unsigned long ulAddrCur = (unsigned long)pv;
f86f2dc613a22ee06add9b878197922466df641bvboxsync const size_t cPages = pMemLnxToMap->Core.cb >> PAGE_SHIFT;
f86f2dc613a22ee06add9b878197922466df641bvboxsync size_t iPage;
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = 0;
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (pMemLnxToMap->cPages)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++, ulAddrCur += PAGE_SIZE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(HAVE_26_STYLE_REMAP_PAGE_RANGE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct vm_area_struct *vma = find_vma(pTask->mm, ulAddrCur); /* this is probably the same for all the pages... */
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertBreak(vma, rc = VERR_INTERNAL_ERROR);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_pfn_range(vma, ulAddrCur, page_to_pfn(pMemLnxToMap->apPages[iPage]), PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(HAVE_26_STYLE_REMAP_PAGE_RANGE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_page_range(vma, ulAddrCur, page_to_phys(pMemLnxToMap->apPages[iPage]), PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* 2.4 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_page_range(ulAddrCur, page_to_phys(pMemLnxToMap->apPages[iPage]), PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (rc)
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync else
8300beb17e7c288655895d07bfdc58a01f618218vboxsync {
8300beb17e7c288655895d07bfdc58a01f618218vboxsync RTHCPHYS Phys;
8300beb17e7c288655895d07bfdc58a01f618218vboxsync if (pMemLnxToMap->Core.enmType == RTR0MEMOBJTYPE_PHYS)
8300beb17e7c288655895d07bfdc58a01f618218vboxsync Phys = pMemLnxToMap->Core.u.Phys.PhysBase;
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync else if (pMemLnxToMap->Core.enmType == RTR0MEMOBJTYPE_CONT)
f86f2dc613a22ee06add9b878197922466df641bvboxsync Phys = pMemLnxToMap->Core.u.Cont.Phys;
f86f2dc613a22ee06add9b878197922466df641bvboxsync else
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertMsgFailed(("%d\n", pMemLnxToMap->Core.enmType));
f86f2dc613a22ee06add9b878197922466df641bvboxsync Phys = NIL_RTHCPHYS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (Phys != NIL_RTHCPHYS)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync for (iPage = 0; iPage < cPages; iPage++, ulAddrCur += PAGE_SIZE, Phys += PAGE_SIZE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(HAVE_26_STYLE_REMAP_PAGE_RANGE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync struct vm_area_struct *vma = find_vma(pTask->mm, ulAddrCur); /* this is probably the same for all the pages... */
f86f2dc613a22ee06add9b878197922466df641bvboxsync AssertBreak(vma, rc = VERR_INTERNAL_ERROR);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 11)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_pfn_range(vma, ulAddrCur, Phys, PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) || defined(HAVE_26_STYLE_REMAP_PAGE_RANGE)
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_page_range(vma, ulAddrCur, Phys, PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#else /* 2.4 */
f86f2dc613a22ee06add9b878197922466df641bvboxsync rc = remap_page_range(ulAddrCur, Phys, PAGE_SIZE, fPg);
f86f2dc613a22ee06add9b878197922466df641bvboxsync#endif
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (rc)
f86f2dc613a22ee06add9b878197922466df641bvboxsync break;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync if (!rc)
f86f2dc613a22ee06add9b878197922466df641bvboxsync {
f86f2dc613a22ee06add9b878197922466df641bvboxsync up_write(&pTask->mm->mmap_sem);
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.pv = pv;
f86f2dc613a22ee06add9b878197922466df641bvboxsync pMemLnx->Core.u.Mapping.R0Process = R0Process;
f86f2dc613a22ee06add9b878197922466df641bvboxsync *ppMem = &pMemLnx->Core;
f86f2dc613a22ee06add9b878197922466df641bvboxsync return VINF_SUCCESS;
f86f2dc613a22ee06add9b878197922466df641bvboxsync }
f86f2dc613a22ee06add9b878197922466df641bvboxsync
f86f2dc613a22ee06add9b878197922466df641bvboxsync /*
f86f2dc613a22ee06add9b878197922466df641bvboxsync * Bail out.
f86f2dc613a22ee06add9b878197922466df641bvboxsync */
f86f2dc613a22ee06add9b878197922466df641bvboxsync MY_DO_MUNMAP(pTask->mm, (unsigned long)pv, pMemLnxToMap->Core.cb);
2a047f0d7ee5964456dbc4dec9925031482588abvboxsync if (rc != VERR_INTERNAL_ERROR)
rc = VERR_NO_MEMORY;
}
up_write(&pTask->mm->mmap_sem);
rtR0MemObjDelete(&pMemLnx->Core);
}
return rc;
}
RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
{
PRTR0MEMOBJLNX pMemLnx = (PRTR0MEMOBJLNX)pMem;
if (pMemLnx->cPages)
return page_to_phys(pMemLnx->apPages[iPage]);
switch (pMemLnx->Core.enmType)
{
case RTR0MEMOBJTYPE_CONT:
return pMemLnx->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
case RTR0MEMOBJTYPE_PHYS:
return pMemLnx->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
/* the parent knows */
case RTR0MEMOBJTYPE_MAPPING:
return rtR0MemObjNativeGetPagePhysAddr(pMemLnx->Core.uRel.Child.pParent, iPage);
/* cPages > 0 */
case RTR0MEMOBJTYPE_LOW:
case RTR0MEMOBJTYPE_LOCK:
case RTR0MEMOBJTYPE_PHYS_NC:
case RTR0MEMOBJTYPE_PAGE:
default:
AssertMsgFailed(("%d\n", pMemLnx->Core.enmType));
/* fall thru */
case RTR0MEMOBJTYPE_RES_VIRT:
return NIL_RTHCPHYS;
}
}