| 1 | /* $Id: PGMPool.cpp 45808 2013-04-29 12:41:07Z vboxsync $ */
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| 2 | /** @file
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| 3 | * PGM Shadow Page Pool.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2013 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | /** @page pg_pgm_pool PGM Shadow Page Pool
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| 19 | *
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| 20 | * Motivations:
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| 21 | * -# Relationship between shadow page tables and physical guest pages. This
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| 22 | * should allow us to skip most of the global flushes now following access
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| 23 | * handler changes. The main expense is flushing shadow pages.
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| 24 | * -# Limit the pool size if necessary (default is kind of limitless).
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| 25 | * -# Allocate shadow pages from RC. We use to only do this in SyncCR3.
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| 26 | * -# Required for 64-bit guests.
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| 27 | * -# Combining the PD cache and page pool in order to simplify caching.
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| 28 | *
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| 29 | *
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| 30 | * @section sec_pgm_pool_outline Design Outline
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| 31 | *
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| 32 | * The shadow page pool tracks pages used for shadowing paging structures (i.e.
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| 33 | * page tables, page directory, page directory pointer table and page map
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| 34 | * level-4). Each page in the pool has an unique identifier. This identifier is
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| 35 | * used to link a guest physical page to a shadow PT. The identifier is a
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| 36 | * non-zero value and has a relativly low max value - say 14 bits. This makes it
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| 37 | * possible to fit it into the upper bits of the of the aHCPhys entries in the
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| 38 | * ram range.
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| 39 | *
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| 40 | * By restricting host physical memory to the first 48 bits (which is the
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| 41 | * announced physical memory range of the K8L chip (scheduled for 2008)), we
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| 42 | * can safely use the upper 16 bits for shadow page ID and reference counting.
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| 43 | *
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| 44 | * Update: The 48 bit assumption will be lifted with the new physical memory
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| 45 | * management (PGMPAGE), so we won't have any trouble when someone stuffs 2TB
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| 46 | * into a box in some years.
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| 47 | *
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| 48 | * Now, it's possible for a page to be aliased, i.e. mapped by more than one PT
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| 49 | * or PD. This is solved by creating a list of physical cross reference extents
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| 50 | * when ever this happens. Each node in the list (extent) is can contain 3 page
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| 51 | * pool indexes. The list it self is chained using indexes into the paPhysExt
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| 52 | * array.
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| 53 | *
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| 54 | *
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| 55 | * @section sec_pgm_pool_life Life Cycle of a Shadow Page
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| 56 | *
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| 57 | * -# The SyncPT function requests a page from the pool.
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| 58 | * The request includes the kind of page it is (PT/PD, PAE/legacy), the
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| 59 | * address of the page it's shadowing, and more.
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| 60 | * -# The pool responds to the request by allocating a new page.
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| 61 | * When the cache is enabled, it will first check if it's in the cache.
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| 62 | * Should the pool be exhausted, one of two things can be done:
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| 63 | * -# Flush the whole pool and current CR3.
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| 64 | * -# Use the cache to find a page which can be flushed (~age).
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| 65 | * -# The SyncPT function will sync one or more pages and insert it into the
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| 66 | * shadow PD.
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| 67 | * -# The SyncPage function may sync more pages on a later \#PFs.
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| 68 | * -# The page is freed / flushed in SyncCR3 (perhaps) and some other cases.
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| 69 | * When caching is enabled, the page isn't flush but remains in the cache.
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| 70 | *
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| 71 | *
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| 72 | * @section sec_pgm_pool_impl Monitoring
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| 73 | *
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| 74 | * We always monitor PAGE_SIZE chunks of memory. When we've got multiple shadow
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| 75 | * pages for the same PAGE_SIZE of guest memory (PAE and mixed PD/PT) the pages
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| 76 | * sharing the monitor get linked using the iMonitoredNext/Prev. The head page
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| 77 | * is the pvUser to the access handlers.
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| 78 | *
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| 79 | *
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| 80 | * @section sec_pgm_pool_impl Implementation
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| 81 | *
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| 82 | * The pool will take pages from the MM page pool. The tracking data
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| 83 | * (attributes, bitmaps and so on) are allocated from the hypervisor heap. The
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| 84 | * pool content can be accessed both by using the page id and the physical
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| 85 | * address (HC). The former is managed by means of an array, the latter by an
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| 86 | * offset based AVL tree.
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| 87 | *
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| 88 | * Flushing of a pool page means that we iterate the content (we know what kind
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| 89 | * it is) and updates the link information in the ram range.
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| 90 | *
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| 91 | * ...
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| 92 | */
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| 93 |
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| 94 |
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| 95 | /*******************************************************************************
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| 96 | * Header Files *
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| 97 | *******************************************************************************/
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| 98 | #define LOG_GROUP LOG_GROUP_PGM_POOL
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| 99 | #include <VBox/vmm/pgm.h>
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| 100 | #include <VBox/vmm/mm.h>
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| 101 | #include "PGMInternal.h"
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| 102 | #include <VBox/vmm/vm.h>
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| 103 | #include <VBox/vmm/uvm.h>
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| 104 | #include "PGMInline.h"
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| 105 |
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| 106 | #include <VBox/log.h>
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| 107 | #include <VBox/err.h>
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| 108 | #include <iprt/asm.h>
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| 109 | #include <iprt/string.h>
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| 110 | #include <VBox/dbg.h>
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| 111 |
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| 112 |
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| 113 | /*******************************************************************************
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| 114 | * Internal Functions *
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| 115 | *******************************************************************************/
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| 116 | static DECLCALLBACK(int) pgmR3PoolAccessHandler(PVM pVM, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser);
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| 117 | #ifdef VBOX_WITH_DEBUGGER
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| 118 | static FNDBGCCMD pgmR3PoolCmdCheck;
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| 119 | #endif
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| 120 |
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| 121 | #ifdef VBOX_WITH_DEBUGGER
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| 122 | /** Command descriptors. */
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| 123 | static const DBGCCMD g_aCmds[] =
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| 124 | {
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| 125 | /* pszCmd, cArgsMin, cArgsMax, paArgDesc, cArgDescs, fFlags, pfnHandler pszSyntax, ....pszDescription */
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| 126 | { "pgmpoolcheck", 0, 0, NULL, 0, 0, pgmR3PoolCmdCheck, "", "Check the pgm pool pages." },
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| 127 | };
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| 128 | #endif
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| 129 |
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| 130 | /**
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| 131 | * Initializes the pool
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| 132 | *
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| 133 | * @returns VBox status code.
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| 134 | * @param pVM Pointer to the VM.
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| 135 | */
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| 136 | int pgmR3PoolInit(PVM pVM)
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| 137 | {
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| 138 | int rc;
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| 139 |
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| 140 | AssertCompile(NIL_PGMPOOL_IDX == 0);
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| 141 | /* pPage->cLocked is an unsigned byte. */
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| 142 | AssertCompile(VMM_MAX_CPU_COUNT <= 255);
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| 143 |
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| 144 | /*
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| 145 | * Query Pool config.
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| 146 | */
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| 147 | PCFGMNODE pCfg = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/PGM/Pool");
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| 148 |
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| 149 | /* Default pgm pool size is 1024 pages (4MB). */
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| 150 | uint16_t cMaxPages = 1024;
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| 151 |
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| 152 | /* Adjust it up relative to the RAM size, using the nested paging formula. */
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| 153 | uint64_t cbRam;
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| 154 | rc = CFGMR3QueryU64Def(CFGMR3GetRoot(pVM), "RamSize", &cbRam, 0); AssertRCReturn(rc, rc);
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| 155 | uint64_t u64MaxPages = (cbRam >> 9)
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| 156 | + (cbRam >> 18)
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| 157 | + (cbRam >> 27)
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| 158 | + 32 * PAGE_SIZE;
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| 159 | u64MaxPages >>= PAGE_SHIFT;
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| 160 | if (u64MaxPages > PGMPOOL_IDX_LAST)
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| 161 | cMaxPages = PGMPOOL_IDX_LAST;
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| 162 | else
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| 163 | cMaxPages = (uint16_t)u64MaxPages;
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| 164 |
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| 165 | /** @cfgm{/PGM/Pool/MaxPages, uint16_t, #pages, 16, 0x3fff, F(ram-size)}
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| 166 | * The max size of the shadow page pool in pages. The pool will grow dynamically
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| 167 | * up to this limit.
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| 168 | */
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| 169 | rc = CFGMR3QueryU16Def(pCfg, "MaxPages", &cMaxPages, cMaxPages);
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| 170 | AssertLogRelRCReturn(rc, rc);
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| 171 | AssertLogRelMsgReturn(cMaxPages <= PGMPOOL_IDX_LAST && cMaxPages >= RT_ALIGN(PGMPOOL_IDX_FIRST, 16),
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| 172 | ("cMaxPages=%u (%#x)\n", cMaxPages, cMaxPages), VERR_INVALID_PARAMETER);
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| 173 | cMaxPages = RT_ALIGN(cMaxPages, 16);
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| 174 | if (cMaxPages > PGMPOOL_IDX_LAST)
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| 175 | cMaxPages = PGMPOOL_IDX_LAST;
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| 176 | LogRel(("PGMPool: cMaxPages=%u (u64MaxPages=%llu)\n", cMaxPages, u64MaxPages));
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| 177 |
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| 178 | /** todo:
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| 179 | * We need to be much more careful with our allocation strategy here.
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| 180 | * For nested paging we don't need pool user info nor extents at all, but
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| 181 | * we can't check for nested paging here (too early during init to get a
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| 182 | * confirmation it can be used). The default for large memory configs is a
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| 183 | * bit large for shadow paging, so I've restricted the extent maximum to 8k
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| 184 | * (8k * 16 = 128k of hyper heap).
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| 185 | *
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| 186 | * Also when large page support is enabled, we typically don't need so much,
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| 187 | * although that depends on the availability of 2 MB chunks on the host.
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| 188 | */
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| 189 |
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| 190 | /** @cfgm{/PGM/Pool/MaxUsers, uint16_t, #users, MaxUsers, 32K, MaxPages*2}
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| 191 | * The max number of shadow page user tracking records. Each shadow page has
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| 192 | * zero of other shadow pages (or CR3s) that references it, or uses it if you
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| 193 | * like. The structures describing these relationships are allocated from a
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| 194 | * fixed sized pool. This configuration variable defines the pool size.
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| 195 | */
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| 196 | uint16_t cMaxUsers;
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| 197 | rc = CFGMR3QueryU16Def(pCfg, "MaxUsers", &cMaxUsers, cMaxPages * 2);
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| 198 | AssertLogRelRCReturn(rc, rc);
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| 199 | AssertLogRelMsgReturn(cMaxUsers >= cMaxPages && cMaxPages <= _32K,
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| 200 | ("cMaxUsers=%u (%#x)\n", cMaxUsers, cMaxUsers), VERR_INVALID_PARAMETER);
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| 201 |
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| 202 | /** @cfgm{/PGM/Pool/MaxPhysExts, uint16_t, #extents, 16, MaxPages * 2, MIN(MaxPages*2,8192)}
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| 203 | * The max number of extents for tracking aliased guest pages.
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| 204 | */
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| 205 | uint16_t cMaxPhysExts;
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| 206 | rc = CFGMR3QueryU16Def(pCfg, "MaxPhysExts", &cMaxPhysExts,
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| 207 | RT_MIN(cMaxPages * 2, 8192 /* 8Ki max as this eat too much hyper heap */));
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| 208 | AssertLogRelRCReturn(rc, rc);
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| 209 | AssertLogRelMsgReturn(cMaxPhysExts >= 16 && cMaxPhysExts <= PGMPOOL_IDX_LAST,
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| 210 | ("cMaxPhysExts=%u (%#x)\n", cMaxPhysExts, cMaxPhysExts), VERR_INVALID_PARAMETER);
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| 211 |
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| 212 | /** @cfgm{/PGM/Pool/ChacheEnabled, bool, true}
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| 213 | * Enables or disabling caching of shadow pages. Caching means that we will try
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| 214 | * reuse shadow pages instead of recreating them everything SyncCR3, SyncPT or
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| 215 | * SyncPage requests one. When reusing a shadow page, we can save time
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| 216 | * reconstructing it and it's children.
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| 217 | */
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| 218 | bool fCacheEnabled;
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| 219 | rc = CFGMR3QueryBoolDef(pCfg, "CacheEnabled", &fCacheEnabled, true);
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| 220 | AssertLogRelRCReturn(rc, rc);
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| 221 |
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| 222 | LogRel(("pgmR3PoolInit: cMaxPages=%#RX16 cMaxUsers=%#RX16 cMaxPhysExts=%#RX16 fCacheEnable=%RTbool\n",
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| 223 | cMaxPages, cMaxUsers, cMaxPhysExts, fCacheEnabled));
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| 224 |
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| 225 | /*
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| 226 | * Allocate the data structures.
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| 227 | */
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| 228 | uint32_t cb = RT_OFFSETOF(PGMPOOL, aPages[cMaxPages]);
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| 229 | cb += cMaxUsers * sizeof(PGMPOOLUSER);
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| 230 | cb += cMaxPhysExts * sizeof(PGMPOOLPHYSEXT);
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| 231 | PPGMPOOL pPool;
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| 232 | rc = MMR3HyperAllocOnceNoRel(pVM, cb, 0, MM_TAG_PGM_POOL, (void **)&pPool);
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| 233 | if (RT_FAILURE(rc))
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| 234 | return rc;
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| 235 | pVM->pgm.s.pPoolR3 = pPool;
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| 236 | pVM->pgm.s.pPoolR0 = MMHyperR3ToR0(pVM, pPool);
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| 237 | pVM->pgm.s.pPoolRC = MMHyperR3ToRC(pVM, pPool);
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| 238 |
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| 239 | /*
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| 240 | * Initialize it.
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| 241 | */
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| 242 | pPool->pVMR3 = pVM;
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| 243 | pPool->pVMR0 = pVM->pVMR0;
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| 244 | pPool->pVMRC = pVM->pVMRC;
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| 245 | pPool->cMaxPages = cMaxPages;
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| 246 | pPool->cCurPages = PGMPOOL_IDX_FIRST;
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| 247 | pPool->iUserFreeHead = 0;
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| 248 | pPool->cMaxUsers = cMaxUsers;
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| 249 | PPGMPOOLUSER paUsers = (PPGMPOOLUSER)&pPool->aPages[pPool->cMaxPages];
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| 250 | pPool->paUsersR3 = paUsers;
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| 251 | pPool->paUsersR0 = MMHyperR3ToR0(pVM, paUsers);
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| 252 | pPool->paUsersRC = MMHyperR3ToRC(pVM, paUsers);
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| 253 | for (unsigned i = 0; i < cMaxUsers; i++)
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| 254 | {
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| 255 | paUsers[i].iNext = i + 1;
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| 256 | paUsers[i].iUser = NIL_PGMPOOL_IDX;
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| 257 | paUsers[i].iUserTable = 0xfffffffe;
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| 258 | }
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| 259 | paUsers[cMaxUsers - 1].iNext = NIL_PGMPOOL_USER_INDEX;
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| 260 | pPool->iPhysExtFreeHead = 0;
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| 261 | pPool->cMaxPhysExts = cMaxPhysExts;
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| 262 | PPGMPOOLPHYSEXT paPhysExts = (PPGMPOOLPHYSEXT)&paUsers[cMaxUsers];
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| 263 | pPool->paPhysExtsR3 = paPhysExts;
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| 264 | pPool->paPhysExtsR0 = MMHyperR3ToR0(pVM, paPhysExts);
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| 265 | pPool->paPhysExtsRC = MMHyperR3ToRC(pVM, paPhysExts);
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| 266 | for (unsigned i = 0; i < cMaxPhysExts; i++)
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| 267 | {
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| 268 | paPhysExts[i].iNext = i + 1;
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| 269 | paPhysExts[i].aidx[0] = NIL_PGMPOOL_IDX;
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| 270 | paPhysExts[i].apte[0] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
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| 271 | paPhysExts[i].aidx[1] = NIL_PGMPOOL_IDX;
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| 272 | paPhysExts[i].apte[1] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
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| 273 | paPhysExts[i].aidx[2] = NIL_PGMPOOL_IDX;
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| 274 | paPhysExts[i].apte[2] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
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| 275 | }
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| 276 | paPhysExts[cMaxPhysExts - 1].iNext = NIL_PGMPOOL_PHYSEXT_INDEX;
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| 277 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aiHash); i++)
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| 278 | pPool->aiHash[i] = NIL_PGMPOOL_IDX;
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| 279 | pPool->iAgeHead = NIL_PGMPOOL_IDX;
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| 280 | pPool->iAgeTail = NIL_PGMPOOL_IDX;
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| 281 | pPool->fCacheEnabled = fCacheEnabled;
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| 282 | pPool->pfnAccessHandlerR3 = pgmR3PoolAccessHandler;
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| 283 | pPool->pszAccessHandler = "Guest Paging Access Handler";
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| 284 | pPool->HCPhysTree = 0;
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| 285 |
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| 286 | /*
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| 287 | * The NIL entry.
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| 288 | */
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| 289 | Assert(NIL_PGMPOOL_IDX == 0);
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| 290 | pPool->aPages[NIL_PGMPOOL_IDX].enmKind = PGMPOOLKIND_INVALID;
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| 291 | pPool->aPages[NIL_PGMPOOL_IDX].idx = NIL_PGMPOOL_IDX;
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| 292 | pPool->aPages[NIL_PGMPOOL_IDX].Core.Key = NIL_RTHCPHYS;
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| 293 | pPool->aPages[NIL_PGMPOOL_IDX].GCPhys = NIL_RTGCPHYS;
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| 294 | pPool->aPages[NIL_PGMPOOL_IDX].iNext = NIL_PGMPOOL_IDX;
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| 295 | /* pPool->aPages[NIL_PGMPOOL_IDX].cLocked = INT32_MAX; - test this out... */
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| 296 | pPool->aPages[NIL_PGMPOOL_IDX].pvPageR3 = 0;
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| 297 | pPool->aPages[NIL_PGMPOOL_IDX].iUserHead = NIL_PGMPOOL_USER_INDEX;
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| 298 | pPool->aPages[NIL_PGMPOOL_IDX].iModifiedNext = NIL_PGMPOOL_IDX;
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| 299 | pPool->aPages[NIL_PGMPOOL_IDX].iModifiedPrev = NIL_PGMPOOL_IDX;
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| 300 | pPool->aPages[NIL_PGMPOOL_IDX].iMonitoredNext = NIL_PGMPOOL_IDX;
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| 301 | pPool->aPages[NIL_PGMPOOL_IDX].iMonitoredNext = NIL_PGMPOOL_IDX;
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| 302 | pPool->aPages[NIL_PGMPOOL_IDX].iAgeNext = NIL_PGMPOOL_IDX;
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| 303 | pPool->aPages[NIL_PGMPOOL_IDX].iAgePrev = NIL_PGMPOOL_IDX;
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| 304 |
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| 305 | Assert(pPool->aPages[NIL_PGMPOOL_IDX].idx == NIL_PGMPOOL_IDX);
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| 306 | Assert(pPool->aPages[NIL_PGMPOOL_IDX].GCPhys == NIL_RTGCPHYS);
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| 307 | Assert(!pPool->aPages[NIL_PGMPOOL_IDX].fSeenNonGlobal);
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| 308 | Assert(!pPool->aPages[NIL_PGMPOOL_IDX].fMonitored);
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| 309 | Assert(!pPool->aPages[NIL_PGMPOOL_IDX].fCached);
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| 310 | Assert(!pPool->aPages[NIL_PGMPOOL_IDX].fZeroed);
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| 311 | Assert(!pPool->aPages[NIL_PGMPOOL_IDX].fReusedFlushPending);
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| 312 |
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| 313 | #ifdef VBOX_WITH_STATISTICS
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| 314 | /*
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| 315 | * Register statistics.
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| 316 | */
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| 317 | STAM_REG(pVM, &pPool->cCurPages, STAMTYPE_U16, "/PGM/Pool/cCurPages", STAMUNIT_PAGES, "Current pool size.");
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| 318 | STAM_REG(pVM, &pPool->cMaxPages, STAMTYPE_U16, "/PGM/Pool/cMaxPages", STAMUNIT_PAGES, "Max pool size.");
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| 319 | STAM_REG(pVM, &pPool->cUsedPages, STAMTYPE_U16, "/PGM/Pool/cUsedPages", STAMUNIT_PAGES, "The number of pages currently in use.");
|
|---|
| 320 | STAM_REG(pVM, &pPool->cUsedPagesHigh, STAMTYPE_U16_RESET, "/PGM/Pool/cUsedPagesHigh", STAMUNIT_PAGES, "The high watermark for cUsedPages.");
|
|---|
| 321 | STAM_REG(pVM, &pPool->StatAlloc, STAMTYPE_PROFILE_ADV, "/PGM/Pool/Alloc", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolAlloc.");
|
|---|
| 322 | STAM_REG(pVM, &pPool->StatClearAll, STAMTYPE_PROFILE, "/PGM/Pool/ClearAll", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmR3PoolClearAll.");
|
|---|
| 323 | STAM_REG(pVM, &pPool->StatR3Reset, STAMTYPE_PROFILE, "/PGM/Pool/R3Reset", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmR3PoolReset.");
|
|---|
| 324 | STAM_REG(pVM, &pPool->StatFlushPage, STAMTYPE_PROFILE, "/PGM/Pool/FlushPage", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolFlushPage.");
|
|---|
| 325 | STAM_REG(pVM, &pPool->StatFree, STAMTYPE_PROFILE, "/PGM/Pool/Free", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolFree.");
|
|---|
| 326 | STAM_REG(pVM, &pPool->StatForceFlushPage, STAMTYPE_COUNTER, "/PGM/Pool/FlushForce", STAMUNIT_OCCURENCES, "Counting explicit flushes by PGMPoolFlushPage().");
|
|---|
| 327 | STAM_REG(pVM, &pPool->StatForceFlushDirtyPage, STAMTYPE_COUNTER, "/PGM/Pool/FlushForceDirty", STAMUNIT_OCCURENCES, "Counting explicit flushes of dirty pages by PGMPoolFlushPage().");
|
|---|
| 328 | STAM_REG(pVM, &pPool->StatForceFlushReused, STAMTYPE_COUNTER, "/PGM/Pool/FlushReused", STAMUNIT_OCCURENCES, "Counting flushes for reused pages.");
|
|---|
| 329 | STAM_REG(pVM, &pPool->StatZeroPage, STAMTYPE_PROFILE, "/PGM/Pool/ZeroPage", STAMUNIT_TICKS_PER_CALL, "Profiling time spent zeroing pages. Overlaps with Alloc.");
|
|---|
| 330 | STAM_REG(pVM, &pPool->cMaxUsers, STAMTYPE_U16, "/PGM/Pool/Track/cMaxUsers", STAMUNIT_COUNT, "Max user tracking records.");
|
|---|
| 331 | STAM_REG(pVM, &pPool->cPresent, STAMTYPE_U32, "/PGM/Pool/Track/cPresent", STAMUNIT_COUNT, "Number of present page table entries.");
|
|---|
| 332 | STAM_REG(pVM, &pPool->StatTrackDeref, STAMTYPE_PROFILE, "/PGM/Pool/Track/Deref", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolTrackDeref.");
|
|---|
| 333 | STAM_REG(pVM, &pPool->StatTrackFlushGCPhysPT, STAMTYPE_PROFILE, "/PGM/Pool/Track/FlushGCPhysPT", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolTrackFlushGCPhysPT.");
|
|---|
| 334 | STAM_REG(pVM, &pPool->StatTrackFlushGCPhysPTs, STAMTYPE_PROFILE, "/PGM/Pool/Track/FlushGCPhysPTs", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolTrackFlushGCPhysPTs.");
|
|---|
| 335 | STAM_REG(pVM, &pPool->StatTrackFlushGCPhysPTsSlow, STAMTYPE_PROFILE, "/PGM/Pool/Track/FlushGCPhysPTsSlow", STAMUNIT_TICKS_PER_CALL, "Profiling of pgmPoolTrackFlushGCPhysPTsSlow.");
|
|---|
| 336 | STAM_REG(pVM, &pPool->StatTrackFlushEntry, STAMTYPE_COUNTER, "/PGM/Pool/Track/Entry/Flush", STAMUNIT_COUNT, "Nr of flushed entries.");
|
|---|
| 337 | STAM_REG(pVM, &pPool->StatTrackFlushEntryKeep, STAMTYPE_COUNTER, "/PGM/Pool/Track/Entry/Update", STAMUNIT_COUNT, "Nr of updated entries.");
|
|---|
| 338 | STAM_REG(pVM, &pPool->StatTrackFreeUpOneUser, STAMTYPE_COUNTER, "/PGM/Pool/Track/FreeUpOneUser", STAMUNIT_TICKS_PER_CALL, "The number of times we were out of user tracking records.");
|
|---|
| 339 | STAM_REG(pVM, &pPool->StatTrackDerefGCPhys, STAMTYPE_PROFILE, "/PGM/Pool/Track/DrefGCPhys", STAMUNIT_TICKS_PER_CALL, "Profiling deref activity related tracking GC physical pages.");
|
|---|
| 340 | STAM_REG(pVM, &pPool->StatTrackLinearRamSearches, STAMTYPE_COUNTER, "/PGM/Pool/Track/LinearRamSearches", STAMUNIT_OCCURENCES, "The number of times we had to do linear ram searches.");
|
|---|
| 341 | STAM_REG(pVM, &pPool->StamTrackPhysExtAllocFailures,STAMTYPE_COUNTER, "/PGM/Pool/Track/PhysExtAllocFailures", STAMUNIT_OCCURENCES, "The number of failing pgmPoolTrackPhysExtAlloc calls.");
|
|---|
| 342 | STAM_REG(pVM, &pPool->StatMonitorRZ, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/RZ", STAMUNIT_TICKS_PER_CALL, "Profiling the RC/R0 access handler.");
|
|---|
| 343 | STAM_REG(pVM, &pPool->StatMonitorRZEmulateInstr, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/EmulateInstr", STAMUNIT_OCCURENCES, "Times we've failed interpreting the instruction.");
|
|---|
| 344 | STAM_REG(pVM, &pPool->StatMonitorRZFlushPage, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/RZ/FlushPage", STAMUNIT_TICKS_PER_CALL, "Profiling the pgmPoolFlushPage calls made from the RC/R0 access handler.");
|
|---|
| 345 | STAM_REG(pVM, &pPool->StatMonitorRZFlushReinit, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/FlushReinit", STAMUNIT_OCCURENCES, "Times we've detected a page table reinit.");
|
|---|
| 346 | STAM_REG(pVM, &pPool->StatMonitorRZFlushModOverflow,STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/FlushOverflow", STAMUNIT_OCCURENCES, "Counting flushes for pages that are modified too often.");
|
|---|
| 347 | STAM_REG(pVM, &pPool->StatMonitorRZFork, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/Fork", STAMUNIT_OCCURENCES, "Times we've detected fork().");
|
|---|
| 348 | STAM_REG(pVM, &pPool->StatMonitorRZHandled, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/RZ/Handled", STAMUNIT_TICKS_PER_CALL, "Profiling the RC/R0 access we've handled (except REP STOSD).");
|
|---|
| 349 | STAM_REG(pVM, &pPool->StatMonitorRZIntrFailPatch1, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/IntrFailPatch1", STAMUNIT_OCCURENCES, "Times we've failed interpreting a patch code instruction.");
|
|---|
| 350 | STAM_REG(pVM, &pPool->StatMonitorRZIntrFailPatch2, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/IntrFailPatch2", STAMUNIT_OCCURENCES, "Times we've failed interpreting a patch code instruction during flushing.");
|
|---|
| 351 | STAM_REG(pVM, &pPool->StatMonitorRZRepPrefix, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/RepPrefix", STAMUNIT_OCCURENCES, "The number of times we've seen rep prefixes we can't handle.");
|
|---|
| 352 | STAM_REG(pVM, &pPool->StatMonitorRZRepStosd, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/RZ/RepStosd", STAMUNIT_TICKS_PER_CALL, "Profiling the REP STOSD cases we've handled.");
|
|---|
| 353 | STAM_REG(pVM, &pPool->StatMonitorRZFaultPT, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/Fault/PT", STAMUNIT_OCCURENCES, "Nr of handled PT faults.");
|
|---|
| 354 | STAM_REG(pVM, &pPool->StatMonitorRZFaultPD, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/Fault/PD", STAMUNIT_OCCURENCES, "Nr of handled PD faults.");
|
|---|
| 355 | STAM_REG(pVM, &pPool->StatMonitorRZFaultPDPT, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/Fault/PDPT", STAMUNIT_OCCURENCES, "Nr of handled PDPT faults.");
|
|---|
| 356 | STAM_REG(pVM, &pPool->StatMonitorRZFaultPML4, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/RZ/Fault/PML4", STAMUNIT_OCCURENCES, "Nr of handled PML4 faults.");
|
|---|
| 357 | STAM_REG(pVM, &pPool->StatMonitorR3, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/R3", STAMUNIT_TICKS_PER_CALL, "Profiling the R3 access handler.");
|
|---|
| 358 | STAM_REG(pVM, &pPool->StatMonitorR3EmulateInstr, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/EmulateInstr", STAMUNIT_OCCURENCES, "Times we've failed interpreting the instruction.");
|
|---|
| 359 | STAM_REG(pVM, &pPool->StatMonitorR3FlushPage, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/R3/FlushPage", STAMUNIT_TICKS_PER_CALL, "Profiling the pgmPoolFlushPage calls made from the R3 access handler.");
|
|---|
| 360 | STAM_REG(pVM, &pPool->StatMonitorR3FlushReinit, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/FlushReinit", STAMUNIT_OCCURENCES, "Times we've detected a page table reinit.");
|
|---|
| 361 | STAM_REG(pVM, &pPool->StatMonitorR3FlushModOverflow,STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/FlushOverflow", STAMUNIT_OCCURENCES, "Counting flushes for pages that are modified too often.");
|
|---|
| 362 | STAM_REG(pVM, &pPool->StatMonitorR3Fork, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Fork", STAMUNIT_OCCURENCES, "Times we've detected fork().");
|
|---|
| 363 | STAM_REG(pVM, &pPool->StatMonitorR3Handled, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/R3/Handled", STAMUNIT_TICKS_PER_CALL, "Profiling the R3 access we've handled (except REP STOSD).");
|
|---|
| 364 | STAM_REG(pVM, &pPool->StatMonitorR3RepPrefix, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/RepPrefix", STAMUNIT_OCCURENCES, "The number of times we've seen rep prefixes we can't handle.");
|
|---|
| 365 | STAM_REG(pVM, &pPool->StatMonitorR3RepStosd, STAMTYPE_PROFILE, "/PGM/Pool/Monitor/R3/RepStosd", STAMUNIT_TICKS_PER_CALL, "Profiling the REP STOSD cases we've handled.");
|
|---|
| 366 | STAM_REG(pVM, &pPool->StatMonitorR3FaultPT, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Fault/PT", STAMUNIT_OCCURENCES, "Nr of handled PT faults.");
|
|---|
| 367 | STAM_REG(pVM, &pPool->StatMonitorR3FaultPD, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Fault/PD", STAMUNIT_OCCURENCES, "Nr of handled PD faults.");
|
|---|
| 368 | STAM_REG(pVM, &pPool->StatMonitorR3FaultPDPT, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Fault/PDPT", STAMUNIT_OCCURENCES, "Nr of handled PDPT faults.");
|
|---|
| 369 | STAM_REG(pVM, &pPool->StatMonitorR3FaultPML4, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Fault/PML4", STAMUNIT_OCCURENCES, "Nr of handled PML4 faults.");
|
|---|
| 370 | STAM_REG(pVM, &pPool->StatMonitorR3Async, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/R3/Async", STAMUNIT_OCCURENCES, "Times we're called in an async thread and need to flush.");
|
|---|
| 371 | STAM_REG(pVM, &pPool->cModifiedPages, STAMTYPE_U16, "/PGM/Pool/Monitor/cModifiedPages", STAMUNIT_PAGES, "The current cModifiedPages value.");
|
|---|
| 372 | STAM_REG(pVM, &pPool->cModifiedPagesHigh, STAMTYPE_U16_RESET, "/PGM/Pool/Monitor/cModifiedPagesHigh", STAMUNIT_PAGES, "The high watermark for cModifiedPages.");
|
|---|
| 373 | STAM_REG(pVM, &pPool->StatResetDirtyPages, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/Dirty/Resets", STAMUNIT_OCCURENCES, "Times we've called pgmPoolResetDirtyPages (and there were dirty page).");
|
|---|
| 374 | STAM_REG(pVM, &pPool->StatDirtyPage, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/Dirty/Pages", STAMUNIT_OCCURENCES, "Times we've called pgmPoolAddDirtyPage.");
|
|---|
| 375 | STAM_REG(pVM, &pPool->StatDirtyPageDupFlush, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/Dirty/FlushDup", STAMUNIT_OCCURENCES, "Times we've had to flush duplicates for dirty page management.");
|
|---|
| 376 | STAM_REG(pVM, &pPool->StatDirtyPageOverFlowFlush, STAMTYPE_COUNTER, "/PGM/Pool/Monitor/Dirty/FlushOverflow",STAMUNIT_OCCURENCES, "Times we've had to flush because of overflow.");
|
|---|
| 377 | STAM_REG(pVM, &pPool->StatCacheHits, STAMTYPE_COUNTER, "/PGM/Pool/Cache/Hits", STAMUNIT_OCCURENCES, "The number of pgmPoolAlloc calls satisfied by the cache.");
|
|---|
| 378 | STAM_REG(pVM, &pPool->StatCacheMisses, STAMTYPE_COUNTER, "/PGM/Pool/Cache/Misses", STAMUNIT_OCCURENCES, "The number of pgmPoolAlloc calls not statisfied by the cache.");
|
|---|
| 379 | STAM_REG(pVM, &pPool->StatCacheKindMismatches, STAMTYPE_COUNTER, "/PGM/Pool/Cache/KindMismatches", STAMUNIT_OCCURENCES, "The number of shadow page kind mismatches. (Better be low, preferably 0!)");
|
|---|
| 380 | STAM_REG(pVM, &pPool->StatCacheFreeUpOne, STAMTYPE_COUNTER, "/PGM/Pool/Cache/FreeUpOne", STAMUNIT_OCCURENCES, "The number of times the cache was asked to free up a page.");
|
|---|
| 381 | STAM_REG(pVM, &pPool->StatCacheCacheable, STAMTYPE_COUNTER, "/PGM/Pool/Cache/Cacheable", STAMUNIT_OCCURENCES, "The number of cacheable allocations.");
|
|---|
| 382 | STAM_REG(pVM, &pPool->StatCacheUncacheable, STAMTYPE_COUNTER, "/PGM/Pool/Cache/Uncacheable", STAMUNIT_OCCURENCES, "The number of uncacheable allocations.");
|
|---|
| 383 | #endif /* VBOX_WITH_STATISTICS */
|
|---|
| 384 |
|
|---|
| 385 | #ifdef VBOX_WITH_DEBUGGER
|
|---|
| 386 | /*
|
|---|
| 387 | * Debugger commands.
|
|---|
| 388 | */
|
|---|
| 389 | static bool s_fRegisteredCmds = false;
|
|---|
| 390 | if (!s_fRegisteredCmds)
|
|---|
| 391 | {
|
|---|
| 392 | rc = DBGCRegisterCommands(&g_aCmds[0], RT_ELEMENTS(g_aCmds));
|
|---|
| 393 | if (RT_SUCCESS(rc))
|
|---|
| 394 | s_fRegisteredCmds = true;
|
|---|
| 395 | }
|
|---|
| 396 | #endif
|
|---|
| 397 |
|
|---|
| 398 | return VINF_SUCCESS;
|
|---|
| 399 | }
|
|---|
| 400 |
|
|---|
| 401 |
|
|---|
| 402 | /**
|
|---|
| 403 | * Relocate the page pool data.
|
|---|
| 404 | *
|
|---|
| 405 | * @param pVM Pointer to the VM.
|
|---|
| 406 | */
|
|---|
| 407 | void pgmR3PoolRelocate(PVM pVM)
|
|---|
| 408 | {
|
|---|
| 409 | pVM->pgm.s.pPoolRC = MMHyperR3ToRC(pVM, pVM->pgm.s.pPoolR3);
|
|---|
| 410 | pVM->pgm.s.pPoolR3->pVMRC = pVM->pVMRC;
|
|---|
| 411 | pVM->pgm.s.pPoolR3->paUsersRC = MMHyperR3ToRC(pVM, pVM->pgm.s.pPoolR3->paUsersR3);
|
|---|
| 412 | pVM->pgm.s.pPoolR3->paPhysExtsRC = MMHyperR3ToRC(pVM, pVM->pgm.s.pPoolR3->paPhysExtsR3);
|
|---|
| 413 |
|
|---|
| 414 | if (!HMIsEnabled(pVM))
|
|---|
| 415 | {
|
|---|
| 416 | int rc = PDMR3LdrGetSymbolRC(pVM, NULL, "pgmPoolAccessHandler", &pVM->pgm.s.pPoolR3->pfnAccessHandlerRC);
|
|---|
| 417 | AssertReleaseRC(rc);
|
|---|
| 418 | }
|
|---|
| 419 |
|
|---|
| 420 | /* init order hack. */
|
|---|
| 421 | if (!pVM->pgm.s.pPoolR3->pfnAccessHandlerR0)
|
|---|
| 422 | {
|
|---|
| 423 | int rc = PDMR3LdrGetSymbolR0(pVM, NULL, "pgmPoolAccessHandler", &pVM->pgm.s.pPoolR3->pfnAccessHandlerR0);
|
|---|
| 424 | AssertReleaseRC(rc);
|
|---|
| 425 | }
|
|---|
| 426 | }
|
|---|
| 427 |
|
|---|
| 428 |
|
|---|
| 429 | /**
|
|---|
| 430 | * Grows the shadow page pool.
|
|---|
| 431 | *
|
|---|
| 432 | * I.e. adds more pages to it, assuming that hasn't reached cMaxPages yet.
|
|---|
| 433 | *
|
|---|
| 434 | * @returns VBox status code.
|
|---|
| 435 | * @param pVM Pointer to the VM.
|
|---|
| 436 | */
|
|---|
| 437 | VMMR3DECL(int) PGMR3PoolGrow(PVM pVM)
|
|---|
| 438 | {
|
|---|
| 439 | PPGMPOOL pPool = pVM->pgm.s.pPoolR3;
|
|---|
| 440 | AssertReturn(pPool->cCurPages < pPool->cMaxPages, VERR_PGM_POOL_MAXED_OUT_ALREADY);
|
|---|
| 441 |
|
|---|
| 442 | /* With 32-bit guests and no EPT, the CR3 limits the root pages to low
|
|---|
| 443 | (below 4 GB) memory. */
|
|---|
| 444 | /** @todo change the pool to handle ROOT page allocations specially when
|
|---|
| 445 | * required. */
|
|---|
| 446 | bool fCanUseHighMemory = HMIsNestedPagingActive(pVM)
|
|---|
| 447 | && HMGetShwPagingMode(pVM) == PGMMODE_EPT;
|
|---|
| 448 |
|
|---|
| 449 | pgmLock(pVM);
|
|---|
| 450 |
|
|---|
| 451 | /*
|
|---|
| 452 | * How much to grow it by?
|
|---|
| 453 | */
|
|---|
| 454 | uint32_t cPages = pPool->cMaxPages - pPool->cCurPages;
|
|---|
| 455 | cPages = RT_MIN(PGMPOOL_CFG_MAX_GROW, cPages);
|
|---|
| 456 | LogFlow(("PGMR3PoolGrow: Growing the pool by %d (%#x) pages. fCanUseHighMemory=%RTbool\n", cPages, cPages, fCanUseHighMemory));
|
|---|
| 457 |
|
|---|
| 458 | for (unsigned i = pPool->cCurPages; cPages-- > 0; i++)
|
|---|
| 459 | {
|
|---|
| 460 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 461 |
|
|---|
| 462 | if (fCanUseHighMemory)
|
|---|
| 463 | pPage->pvPageR3 = MMR3PageAlloc(pVM);
|
|---|
| 464 | else
|
|---|
| 465 | pPage->pvPageR3 = MMR3PageAllocLow(pVM);
|
|---|
| 466 | if (!pPage->pvPageR3)
|
|---|
| 467 | {
|
|---|
| 468 | Log(("We're out of memory!! i=%d fCanUseHighMemory=%RTbool\n", i, fCanUseHighMemory));
|
|---|
| 469 | pgmUnlock(pVM);
|
|---|
| 470 | return i ? VINF_SUCCESS : VERR_NO_PAGE_MEMORY;
|
|---|
| 471 | }
|
|---|
| 472 | pPage->Core.Key = MMPage2Phys(pVM, pPage->pvPageR3);
|
|---|
| 473 | AssertFatal(pPage->Core.Key < _4G || fCanUseHighMemory);
|
|---|
| 474 | pPage->GCPhys = NIL_RTGCPHYS;
|
|---|
| 475 | pPage->enmKind = PGMPOOLKIND_FREE;
|
|---|
| 476 | pPage->idx = pPage - &pPool->aPages[0];
|
|---|
| 477 | LogFlow(("PGMR3PoolGrow: insert page #%#x - %RHp\n", pPage->idx, pPage->Core.Key));
|
|---|
| 478 | pPage->iNext = pPool->iFreeHead;
|
|---|
| 479 | pPage->iUserHead = NIL_PGMPOOL_USER_INDEX;
|
|---|
| 480 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 481 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 482 | pPage->iMonitoredNext = NIL_PGMPOOL_IDX;
|
|---|
| 483 | pPage->iMonitoredNext = NIL_PGMPOOL_IDX;
|
|---|
| 484 | pPage->iAgeNext = NIL_PGMPOOL_IDX;
|
|---|
| 485 | pPage->iAgePrev = NIL_PGMPOOL_IDX;
|
|---|
| 486 | /* commit it */
|
|---|
| 487 | bool fRc = RTAvloHCPhysInsert(&pPool->HCPhysTree, &pPage->Core); Assert(fRc); NOREF(fRc);
|
|---|
| 488 | pPool->iFreeHead = i;
|
|---|
| 489 | pPool->cCurPages = i + 1;
|
|---|
| 490 | }
|
|---|
| 491 |
|
|---|
| 492 | pgmUnlock(pVM);
|
|---|
| 493 | Assert(pPool->cCurPages <= pPool->cMaxPages);
|
|---|
| 494 | return VINF_SUCCESS;
|
|---|
| 495 | }
|
|---|
| 496 |
|
|---|
| 497 |
|
|---|
| 498 |
|
|---|
| 499 | /**
|
|---|
| 500 | * Worker used by pgmR3PoolAccessHandler when it's invoked by an async thread.
|
|---|
| 501 | *
|
|---|
| 502 | * @param pPool The pool.
|
|---|
| 503 | * @param pPage The page.
|
|---|
| 504 | */
|
|---|
| 505 | static DECLCALLBACK(void) pgmR3PoolFlushReusedPage(PPGMPOOL pPool, PPGMPOOLPAGE pPage)
|
|---|
| 506 | {
|
|---|
| 507 | /* for the present this should be safe enough I think... */
|
|---|
| 508 | pgmLock(pPool->pVMR3);
|
|---|
| 509 | if ( pPage->fReusedFlushPending
|
|---|
| 510 | && pPage->enmKind != PGMPOOLKIND_FREE)
|
|---|
| 511 | pgmPoolFlushPage(pPool, pPage);
|
|---|
| 512 | pgmUnlock(pPool->pVMR3);
|
|---|
| 513 | }
|
|---|
| 514 |
|
|---|
| 515 |
|
|---|
| 516 | /**
|
|---|
| 517 | * \#PF Handler callback for PT write accesses.
|
|---|
| 518 | *
|
|---|
| 519 | * The handler can not raise any faults, it's mainly for monitoring write access
|
|---|
| 520 | * to certain pages.
|
|---|
| 521 | *
|
|---|
| 522 | * @returns VINF_SUCCESS if the handler has carried out the operation.
|
|---|
| 523 | * @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation.
|
|---|
| 524 | * @param pVM Pointer to the VM.
|
|---|
| 525 | * @param GCPhys The physical address the guest is writing to.
|
|---|
| 526 | * @param pvPhys The HC mapping of that address.
|
|---|
| 527 | * @param pvBuf What the guest is reading/writing.
|
|---|
| 528 | * @param cbBuf How much it's reading/writing.
|
|---|
| 529 | * @param enmAccessType The access type.
|
|---|
| 530 | * @param pvUser User argument.
|
|---|
| 531 | */
|
|---|
| 532 | static DECLCALLBACK(int) pgmR3PoolAccessHandler(PVM pVM, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf,
|
|---|
| 533 | PGMACCESSTYPE enmAccessType, void *pvUser)
|
|---|
| 534 | {
|
|---|
| 535 | STAM_PROFILE_START(&pVM->pgm.s.pPoolR3->StatMonitorR3, a);
|
|---|
| 536 | PPGMPOOL pPool = pVM->pgm.s.pPoolR3;
|
|---|
| 537 | PPGMPOOLPAGE pPage = (PPGMPOOLPAGE)pvUser;
|
|---|
| 538 | PVMCPU pVCpu = VMMGetCpu(pVM);
|
|---|
| 539 | LogFlow(("pgmR3PoolAccessHandler: GCPhys=%RGp %p:{.Core=%RHp, .idx=%d, .GCPhys=%RGp, .enmType=%d}\n",
|
|---|
| 540 | GCPhys, pPage, pPage->Core.Key, pPage->idx, pPage->GCPhys, pPage->enmKind));
|
|---|
| 541 |
|
|---|
| 542 | NOREF(pvBuf); NOREF(enmAccessType);
|
|---|
| 543 |
|
|---|
| 544 | /*
|
|---|
| 545 | * We don't have to be very sophisticated about this since there are relativly few calls here.
|
|---|
| 546 | * However, we must try our best to detect any non-cpu accesses (disk / networking).
|
|---|
| 547 | *
|
|---|
| 548 | * Just to make life more interesting, we'll have to deal with the async threads too.
|
|---|
| 549 | * We cannot flush a page if we're in an async thread because of REM notifications.
|
|---|
| 550 | */
|
|---|
| 551 | pgmLock(pVM);
|
|---|
| 552 | if (PHYS_PAGE_ADDRESS(GCPhys) != PHYS_PAGE_ADDRESS(pPage->GCPhys))
|
|---|
| 553 | {
|
|---|
| 554 | /* Pool page changed while we were waiting for the lock; ignore. */
|
|---|
| 555 | Log(("CPU%d: pgmR3PoolAccessHandler pgm pool page for %RGp changed (to %RGp) while waiting!\n", pVCpu->idCpu, PHYS_PAGE_ADDRESS(GCPhys), PHYS_PAGE_ADDRESS(pPage->GCPhys)));
|
|---|
| 556 | pgmUnlock(pVM);
|
|---|
| 557 | return VINF_PGM_HANDLER_DO_DEFAULT;
|
|---|
| 558 | }
|
|---|
| 559 |
|
|---|
| 560 | Assert(pPage->enmKind != PGMPOOLKIND_FREE);
|
|---|
| 561 |
|
|---|
| 562 | /* @todo this code doesn't make any sense. remove the if (!pVCpu) block */
|
|---|
| 563 | if (!pVCpu) /** @todo This shouldn't happen any longer, all access handlers will be called on an EMT. All ring-3 handlers, except MMIO, already own the PGM lock. @bugref{3170} */
|
|---|
| 564 | {
|
|---|
| 565 | Log(("pgmR3PoolAccessHandler: async thread, requesting EMT to flush the page: %p:{.Core=%RHp, .idx=%d, .GCPhys=%RGp, .enmType=%d}\n",
|
|---|
| 566 | pPage, pPage->Core.Key, pPage->idx, pPage->GCPhys, pPage->enmKind));
|
|---|
| 567 | STAM_COUNTER_INC(&pPool->StatMonitorR3Async);
|
|---|
| 568 | if (!pPage->fReusedFlushPending)
|
|---|
| 569 | {
|
|---|
| 570 | pgmUnlock(pVM);
|
|---|
| 571 | int rc = VMR3ReqCallVoidNoWait(pPool->pVMR3, VMCPUID_ANY, (PFNRT)pgmR3PoolFlushReusedPage, 2, pPool, pPage);
|
|---|
| 572 | AssertRCReturn(rc, rc);
|
|---|
| 573 | pgmLock(pVM);
|
|---|
| 574 | pPage->fReusedFlushPending = true;
|
|---|
| 575 | pPage->cModifications += 0x1000;
|
|---|
| 576 | }
|
|---|
| 577 |
|
|---|
| 578 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys, pvPhys, 0 /* unknown write size */);
|
|---|
| 579 | /** @todo r=bird: making unsafe assumption about not crossing entries here! */
|
|---|
| 580 | while (cbBuf > 4)
|
|---|
| 581 | {
|
|---|
| 582 | cbBuf -= 4;
|
|---|
| 583 | pvPhys = (uint8_t *)pvPhys + 4;
|
|---|
| 584 | GCPhys += 4;
|
|---|
| 585 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys, pvPhys, 0 /* unknown write size */);
|
|---|
| 586 | }
|
|---|
| 587 | STAM_PROFILE_STOP(&pPool->StatMonitorR3, a);
|
|---|
| 588 | }
|
|---|
| 589 | else if ( ( pPage->cModifications < 96 /* it's cheaper here. */
|
|---|
| 590 | || pgmPoolIsPageLocked(pPage)
|
|---|
| 591 | )
|
|---|
| 592 | && cbBuf <= 4)
|
|---|
| 593 | {
|
|---|
| 594 | /* Clear the shadow entry. */
|
|---|
| 595 | if (!pPage->cModifications++)
|
|---|
| 596 | pgmPoolMonitorModifiedInsert(pPool, pPage);
|
|---|
| 597 | /** @todo r=bird: making unsafe assumption about not crossing entries here! */
|
|---|
| 598 | pgmPoolMonitorChainChanging(pVCpu, pPool, pPage, GCPhys, pvPhys, 0 /* unknown write size */);
|
|---|
| 599 | STAM_PROFILE_STOP(&pPool->StatMonitorR3, a);
|
|---|
| 600 | }
|
|---|
| 601 | else
|
|---|
| 602 | {
|
|---|
| 603 | pgmPoolMonitorChainFlush(pPool, pPage); /* ASSUME that VERR_PGM_POOL_CLEARED can be ignored here and that FFs will deal with it in due time. */
|
|---|
| 604 | STAM_PROFILE_STOP_EX(&pPool->StatMonitorR3, &pPool->StatMonitorR3FlushPage, a);
|
|---|
| 605 | }
|
|---|
| 606 | pgmUnlock(pVM);
|
|---|
| 607 | return VINF_PGM_HANDLER_DO_DEFAULT;
|
|---|
| 608 | }
|
|---|
| 609 |
|
|---|
| 610 |
|
|---|
| 611 | /**
|
|---|
| 612 | * Rendezvous callback used by pgmR3PoolClearAll that clears all shadow pages
|
|---|
| 613 | * and all modification counters.
|
|---|
| 614 | *
|
|---|
| 615 | * This is only called on one of the EMTs while the other ones are waiting for
|
|---|
| 616 | * it to complete this function.
|
|---|
| 617 | *
|
|---|
| 618 | * @returns VINF_SUCCESS (VBox strict status code).
|
|---|
| 619 | * @param pVM Pointer to the VM.
|
|---|
| 620 | * @param pVCpu The VMCPU for the EMT we're being called on. Unused.
|
|---|
| 621 | * @param fpvFlushRemTlb When not NULL, we'll flush the REM TLB as well.
|
|---|
| 622 | * (This is the pvUser, so it has to be void *.)
|
|---|
| 623 | *
|
|---|
| 624 | */
|
|---|
| 625 | DECLCALLBACK(VBOXSTRICTRC) pgmR3PoolClearAllRendezvous(PVM pVM, PVMCPU pVCpu, void *fpvFlushRemTbl)
|
|---|
| 626 | {
|
|---|
| 627 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 628 | STAM_PROFILE_START(&pPool->StatClearAll, c);
|
|---|
| 629 | NOREF(pVCpu);
|
|---|
| 630 |
|
|---|
| 631 | pgmLock(pVM);
|
|---|
| 632 | Log(("pgmR3PoolClearAllRendezvous: cUsedPages=%d fpvFlushRemTbl=%RTbool\n", pPool->cUsedPages, !!fpvFlushRemTbl));
|
|---|
| 633 |
|
|---|
| 634 | /*
|
|---|
| 635 | * Iterate all the pages until we've encountered all that are in use.
|
|---|
| 636 | * This is a simple but not quite optimal solution.
|
|---|
| 637 | */
|
|---|
| 638 | unsigned cModifiedPages = 0; NOREF(cModifiedPages);
|
|---|
| 639 | unsigned cLeft = pPool->cUsedPages;
|
|---|
| 640 | uint32_t iPage = pPool->cCurPages;
|
|---|
| 641 | while (--iPage >= PGMPOOL_IDX_FIRST)
|
|---|
| 642 | {
|
|---|
| 643 | PPGMPOOLPAGE pPage = &pPool->aPages[iPage];
|
|---|
| 644 | if (pPage->GCPhys != NIL_RTGCPHYS)
|
|---|
| 645 | {
|
|---|
| 646 | switch (pPage->enmKind)
|
|---|
| 647 | {
|
|---|
| 648 | /*
|
|---|
| 649 | * We only care about shadow page tables that reference physical memory
|
|---|
| 650 | */
|
|---|
| 651 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 652 | case PGMPOOLKIND_EPT_PD_FOR_PHYS: /* Large pages reference 2 MB of physical memory, so we must clear them. */
|
|---|
| 653 | if (pPage->cPresent)
|
|---|
| 654 | {
|
|---|
| 655 | PX86PDPAE pShwPD = (PX86PDPAE)PGMPOOL_PAGE_2_PTR_V2(pPool->CTX_SUFF(pVM), pVCpu, pPage);
|
|---|
| 656 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPD->a); i++)
|
|---|
| 657 | {
|
|---|
| 658 | if ( pShwPD->a[i].n.u1Present
|
|---|
| 659 | && pShwPD->a[i].b.u1Size)
|
|---|
| 660 | {
|
|---|
| 661 | Assert(!(pShwPD->a[i].u & PGM_PDFLAGS_MAPPING));
|
|---|
| 662 | pShwPD->a[i].u = 0;
|
|---|
| 663 | Assert(pPage->cPresent);
|
|---|
| 664 | pPage->cPresent--;
|
|---|
| 665 | }
|
|---|
| 666 | }
|
|---|
| 667 | if (pPage->cPresent == 0)
|
|---|
| 668 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 669 | }
|
|---|
| 670 | goto default_case;
|
|---|
| 671 |
|
|---|
| 672 | case PGMPOOLKIND_PAE_PD_PHYS: /* Large pages reference 2 MB of physical memory, so we must clear them. */
|
|---|
| 673 | if (pPage->cPresent)
|
|---|
| 674 | {
|
|---|
| 675 | PEPTPD pShwPD = (PEPTPD)PGMPOOL_PAGE_2_PTR_V2(pPool->CTX_SUFF(pVM), pVCpu, pPage);
|
|---|
| 676 | for (unsigned i = 0; i < RT_ELEMENTS(pShwPD->a); i++)
|
|---|
| 677 | {
|
|---|
| 678 | Assert((pShwPD->a[i].u & UINT64_C(0xfff0000000000f80)) == 0);
|
|---|
| 679 | if ( pShwPD->a[i].n.u1Present
|
|---|
| 680 | && pShwPD->a[i].b.u1Size)
|
|---|
| 681 | {
|
|---|
| 682 | Assert(!(pShwPD->a[i].u & PGM_PDFLAGS_MAPPING));
|
|---|
| 683 | pShwPD->a[i].u = 0;
|
|---|
| 684 | Assert(pPage->cPresent);
|
|---|
| 685 | pPage->cPresent--;
|
|---|
| 686 | }
|
|---|
| 687 | }
|
|---|
| 688 | if (pPage->cPresent == 0)
|
|---|
| 689 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 690 | }
|
|---|
| 691 | goto default_case;
|
|---|
| 692 | #endif /* PGM_WITH_LARGE_PAGES */
|
|---|
| 693 |
|
|---|
| 694 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 695 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 696 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 697 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 698 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 699 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 700 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 701 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 702 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 703 | {
|
|---|
| 704 | if (pPage->cPresent)
|
|---|
| 705 | {
|
|---|
| 706 | void *pvShw = PGMPOOL_PAGE_2_PTR_V2(pPool->CTX_SUFF(pVM), pVCpu, pPage);
|
|---|
| 707 | STAM_PROFILE_START(&pPool->StatZeroPage, z);
|
|---|
| 708 | #if 0
|
|---|
| 709 | /* Useful check for leaking references; *very* expensive though. */
|
|---|
| 710 | switch (pPage->enmKind)
|
|---|
| 711 | {
|
|---|
| 712 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 713 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 714 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 715 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 716 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 717 | {
|
|---|
| 718 | bool fFoundFirst = false;
|
|---|
| 719 | PPGMSHWPTPAE pPT = (PPGMSHWPTPAE)pvShw;
|
|---|
| 720 | for (unsigned ptIndex = 0; ptIndex < RT_ELEMENTS(pPT->a); ptIndex++)
|
|---|
| 721 | {
|
|---|
| 722 | if (pPT->a[ptIndex].u)
|
|---|
| 723 | {
|
|---|
| 724 | if (!fFoundFirst)
|
|---|
| 725 | {
|
|---|
| 726 | AssertFatalMsg(pPage->iFirstPresent <= ptIndex, ("ptIndex = %d first present = %d\n", ptIndex, pPage->iFirstPresent));
|
|---|
| 727 | if (pPage->iFirstPresent != ptIndex)
|
|---|
| 728 | Log(("ptIndex = %d first present = %d\n", ptIndex, pPage->iFirstPresent));
|
|---|
| 729 | fFoundFirst = true;
|
|---|
| 730 | }
|
|---|
| 731 | if (PGMSHWPTEPAE_IS_P(pPT->a[ptIndex]))
|
|---|
| 732 | {
|
|---|
| 733 | pgmPoolTracDerefGCPhysHint(pPool, pPage, PGMSHWPTEPAE_GET_HCPHYS(pPT->a[ptIndex]), NIL_RTGCPHYS);
|
|---|
| 734 | if (pPage->iFirstPresent == ptIndex)
|
|---|
| 735 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 736 | }
|
|---|
| 737 | }
|
|---|
| 738 | }
|
|---|
| 739 | AssertFatalMsg(pPage->cPresent == 0, ("cPresent = %d pPage = %RGv\n", pPage->cPresent, pPage->GCPhys));
|
|---|
| 740 | break;
|
|---|
| 741 | }
|
|---|
| 742 | default:
|
|---|
| 743 | break;
|
|---|
| 744 | }
|
|---|
| 745 | #endif
|
|---|
| 746 | ASMMemZeroPage(pvShw);
|
|---|
| 747 | STAM_PROFILE_STOP(&pPool->StatZeroPage, z);
|
|---|
| 748 | pPage->cPresent = 0;
|
|---|
| 749 | pPage->iFirstPresent = NIL_PGMPOOL_PRESENT_INDEX;
|
|---|
| 750 | }
|
|---|
| 751 | }
|
|---|
| 752 | /* fall thru */
|
|---|
| 753 |
|
|---|
| 754 | #ifdef PGM_WITH_LARGE_PAGES
|
|---|
| 755 | default_case:
|
|---|
| 756 | #endif
|
|---|
| 757 | default:
|
|---|
| 758 | Assert(!pPage->cModifications || ++cModifiedPages);
|
|---|
| 759 | Assert(pPage->iModifiedNext == NIL_PGMPOOL_IDX || pPage->cModifications);
|
|---|
| 760 | Assert(pPage->iModifiedPrev == NIL_PGMPOOL_IDX || pPage->cModifications);
|
|---|
| 761 | pPage->iModifiedNext = NIL_PGMPOOL_IDX;
|
|---|
| 762 | pPage->iModifiedPrev = NIL_PGMPOOL_IDX;
|
|---|
| 763 | pPage->cModifications = 0;
|
|---|
| 764 | break;
|
|---|
| 765 |
|
|---|
| 766 | }
|
|---|
| 767 | if (!--cLeft)
|
|---|
| 768 | break;
|
|---|
| 769 | }
|
|---|
| 770 | }
|
|---|
| 771 |
|
|---|
| 772 | #ifndef DEBUG_michael
|
|---|
| 773 | AssertMsg(cModifiedPages == pPool->cModifiedPages, ("%d != %d\n", cModifiedPages, pPool->cModifiedPages));
|
|---|
| 774 | #endif
|
|---|
| 775 | pPool->iModifiedHead = NIL_PGMPOOL_IDX;
|
|---|
| 776 | pPool->cModifiedPages = 0;
|
|---|
| 777 |
|
|---|
| 778 | /*
|
|---|
| 779 | * Clear all the GCPhys links and rebuild the phys ext free list.
|
|---|
| 780 | */
|
|---|
| 781 | for (PPGMRAMRANGE pRam = pPool->CTX_SUFF(pVM)->pgm.s.CTX_SUFF(pRamRangesX);
|
|---|
| 782 | pRam;
|
|---|
| 783 | pRam = pRam->CTX_SUFF(pNext))
|
|---|
| 784 | {
|
|---|
| 785 | iPage = pRam->cb >> PAGE_SHIFT;
|
|---|
| 786 | while (iPage-- > 0)
|
|---|
| 787 | PGM_PAGE_SET_TRACKING(pVM, &pRam->aPages[iPage], 0);
|
|---|
| 788 | }
|
|---|
| 789 |
|
|---|
| 790 | pPool->iPhysExtFreeHead = 0;
|
|---|
| 791 | PPGMPOOLPHYSEXT paPhysExts = pPool->CTX_SUFF(paPhysExts);
|
|---|
| 792 | const unsigned cMaxPhysExts = pPool->cMaxPhysExts;
|
|---|
| 793 | for (unsigned i = 0; i < cMaxPhysExts; i++)
|
|---|
| 794 | {
|
|---|
| 795 | paPhysExts[i].iNext = i + 1;
|
|---|
| 796 | paPhysExts[i].aidx[0] = NIL_PGMPOOL_IDX;
|
|---|
| 797 | paPhysExts[i].apte[0] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 798 | paPhysExts[i].aidx[1] = NIL_PGMPOOL_IDX;
|
|---|
| 799 | paPhysExts[i].apte[1] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 800 | paPhysExts[i].aidx[2] = NIL_PGMPOOL_IDX;
|
|---|
| 801 | paPhysExts[i].apte[2] = NIL_PGMPOOL_PHYSEXT_IDX_PTE;
|
|---|
| 802 | }
|
|---|
| 803 | paPhysExts[cMaxPhysExts - 1].iNext = NIL_PGMPOOL_PHYSEXT_INDEX;
|
|---|
| 804 |
|
|---|
| 805 |
|
|---|
| 806 | #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 807 | /* Reset all dirty pages to reactivate the page monitoring. */
|
|---|
| 808 | /* Note: we must do this *after* clearing all page references and shadow page tables as there might be stale references to
|
|---|
| 809 | * recently removed MMIO ranges around that might otherwise end up asserting in pgmPoolTracDerefGCPhysHint
|
|---|
| 810 | */
|
|---|
| 811 | for (unsigned i = 0; i < RT_ELEMENTS(pPool->aDirtyPages); i++)
|
|---|
| 812 | {
|
|---|
| 813 | PPGMPOOLPAGE pPage;
|
|---|
| 814 | unsigned idxPage;
|
|---|
| 815 |
|
|---|
| 816 | if (pPool->aDirtyPages[i].uIdx == NIL_PGMPOOL_IDX)
|
|---|
| 817 | continue;
|
|---|
| 818 |
|
|---|
| 819 | idxPage = pPool->aDirtyPages[i].uIdx;
|
|---|
| 820 | AssertRelease(idxPage != NIL_PGMPOOL_IDX);
|
|---|
| 821 | pPage = &pPool->aPages[idxPage];
|
|---|
| 822 | Assert(pPage->idx == idxPage);
|
|---|
| 823 | Assert(pPage->iMonitoredNext == NIL_PGMPOOL_IDX && pPage->iMonitoredPrev == NIL_PGMPOOL_IDX);
|
|---|
| 824 |
|
|---|
| 825 | AssertMsg(pPage->fDirty, ("Page %RGp (slot=%d) not marked dirty!", pPage->GCPhys, i));
|
|---|
| 826 |
|
|---|
| 827 | Log(("Reactivate dirty page %RGp\n", pPage->GCPhys));
|
|---|
| 828 |
|
|---|
| 829 | /* First write protect the page again to catch all write accesses. (before checking for changes -> SMP) */
|
|---|
| 830 | int rc = PGMHandlerPhysicalReset(pVM, pPage->GCPhys & PAGE_BASE_GC_MASK);
|
|---|
| 831 | AssertRCSuccess(rc);
|
|---|
| 832 | pPage->fDirty = false;
|
|---|
| 833 |
|
|---|
| 834 | pPool->aDirtyPages[i].uIdx = NIL_PGMPOOL_IDX;
|
|---|
| 835 | }
|
|---|
| 836 |
|
|---|
| 837 | /* Clear all dirty pages. */
|
|---|
| 838 | pPool->idxFreeDirtyPage = 0;
|
|---|
| 839 | pPool->cDirtyPages = 0;
|
|---|
| 840 | #endif
|
|---|
| 841 |
|
|---|
| 842 | /* Clear the PGM_SYNC_CLEAR_PGM_POOL flag on all VCPUs to prevent redundant flushes. */
|
|---|
| 843 | for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
|
|---|
| 844 | pVM->aCpus[idCpu].pgm.s.fSyncFlags &= ~PGM_SYNC_CLEAR_PGM_POOL;
|
|---|
| 845 |
|
|---|
| 846 | /* Flush job finished. */
|
|---|
| 847 | VM_FF_CLEAR(pVM, VM_FF_PGM_POOL_FLUSH_PENDING);
|
|---|
| 848 | pPool->cPresent = 0;
|
|---|
| 849 | pgmUnlock(pVM);
|
|---|
| 850 |
|
|---|
| 851 | PGM_INVL_ALL_VCPU_TLBS(pVM);
|
|---|
| 852 |
|
|---|
| 853 | if (fpvFlushRemTbl)
|
|---|
| 854 | for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
|
|---|
| 855 | CPUMSetChangedFlags(&pVM->aCpus[idCpu], CPUM_CHANGED_GLOBAL_TLB_FLUSH);
|
|---|
| 856 |
|
|---|
| 857 | STAM_PROFILE_STOP(&pPool->StatClearAll, c);
|
|---|
| 858 | return VINF_SUCCESS;
|
|---|
| 859 | }
|
|---|
| 860 |
|
|---|
| 861 |
|
|---|
| 862 | /**
|
|---|
| 863 | * Clears the shadow page pool.
|
|---|
| 864 | *
|
|---|
| 865 | * @param pVM Pointer to the VM.
|
|---|
| 866 | * @param fFlushRemTlb When set, the REM TLB is scheduled for flushing as
|
|---|
| 867 | * well.
|
|---|
| 868 | */
|
|---|
| 869 | void pgmR3PoolClearAll(PVM pVM, bool fFlushRemTlb)
|
|---|
| 870 | {
|
|---|
| 871 | int rc = VMMR3EmtRendezvous(pVM, VMMEMTRENDEZVOUS_FLAGS_TYPE_ONCE, pgmR3PoolClearAllRendezvous, &fFlushRemTlb);
|
|---|
| 872 | AssertRC(rc);
|
|---|
| 873 | }
|
|---|
| 874 |
|
|---|
| 875 |
|
|---|
| 876 | /**
|
|---|
| 877 | * Protect all pgm pool page table entries to monitor writes
|
|---|
| 878 | *
|
|---|
| 879 | * @param pVM Pointer to the VM.
|
|---|
| 880 | *
|
|---|
| 881 | * @remarks ASSUMES the caller will flush all TLBs!!
|
|---|
| 882 | */
|
|---|
| 883 | void pgmR3PoolWriteProtectPages(PVM pVM)
|
|---|
| 884 | {
|
|---|
| 885 | PGM_LOCK_ASSERT_OWNER(pVM);
|
|---|
| 886 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 887 | unsigned cLeft = pPool->cUsedPages;
|
|---|
| 888 | unsigned iPage = pPool->cCurPages;
|
|---|
| 889 | while (--iPage >= PGMPOOL_IDX_FIRST)
|
|---|
| 890 | {
|
|---|
| 891 | PPGMPOOLPAGE pPage = &pPool->aPages[iPage];
|
|---|
| 892 | if ( pPage->GCPhys != NIL_RTGCPHYS
|
|---|
| 893 | && pPage->cPresent)
|
|---|
| 894 | {
|
|---|
| 895 | union
|
|---|
| 896 | {
|
|---|
| 897 | void *pv;
|
|---|
| 898 | PX86PT pPT;
|
|---|
| 899 | PPGMSHWPTPAE pPTPae;
|
|---|
| 900 | PEPTPT pPTEpt;
|
|---|
| 901 | } uShw;
|
|---|
| 902 | uShw.pv = PGMPOOL_PAGE_2_PTR(pVM, pPage);
|
|---|
| 903 |
|
|---|
| 904 | switch (pPage->enmKind)
|
|---|
| 905 | {
|
|---|
| 906 | /*
|
|---|
| 907 | * We only care about shadow page tables.
|
|---|
| 908 | */
|
|---|
| 909 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_PT:
|
|---|
| 910 | case PGMPOOLKIND_32BIT_PT_FOR_32BIT_4MB:
|
|---|
| 911 | case PGMPOOLKIND_32BIT_PT_FOR_PHYS:
|
|---|
| 912 | for (unsigned iShw = 0; iShw < RT_ELEMENTS(uShw.pPT->a); iShw++)
|
|---|
| 913 | {
|
|---|
| 914 | if (uShw.pPT->a[iShw].n.u1Present)
|
|---|
| 915 | uShw.pPT->a[iShw].n.u1Write = 0;
|
|---|
| 916 | }
|
|---|
| 917 | break;
|
|---|
| 918 |
|
|---|
| 919 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_PT:
|
|---|
| 920 | case PGMPOOLKIND_PAE_PT_FOR_32BIT_4MB:
|
|---|
| 921 | case PGMPOOLKIND_PAE_PT_FOR_PAE_PT:
|
|---|
| 922 | case PGMPOOLKIND_PAE_PT_FOR_PAE_2MB:
|
|---|
| 923 | case PGMPOOLKIND_PAE_PT_FOR_PHYS:
|
|---|
| 924 | for (unsigned iShw = 0; iShw < RT_ELEMENTS(uShw.pPTPae->a); iShw++)
|
|---|
| 925 | {
|
|---|
| 926 | if (PGMSHWPTEPAE_IS_P(uShw.pPTPae->a[iShw]))
|
|---|
| 927 | PGMSHWPTEPAE_SET_RO(uShw.pPTPae->a[iShw]);
|
|---|
| 928 | }
|
|---|
| 929 | break;
|
|---|
| 930 |
|
|---|
| 931 | case PGMPOOLKIND_EPT_PT_FOR_PHYS:
|
|---|
| 932 | for (unsigned iShw = 0; iShw < RT_ELEMENTS(uShw.pPTEpt->a); iShw++)
|
|---|
| 933 | {
|
|---|
| 934 | if (uShw.pPTEpt->a[iShw].n.u1Present)
|
|---|
| 935 | uShw.pPTEpt->a[iShw].n.u1Write = 0;
|
|---|
| 936 | }
|
|---|
| 937 | break;
|
|---|
| 938 |
|
|---|
| 939 | default:
|
|---|
| 940 | break;
|
|---|
| 941 | }
|
|---|
| 942 | if (!--cLeft)
|
|---|
| 943 | break;
|
|---|
| 944 | }
|
|---|
| 945 | }
|
|---|
| 946 | }
|
|---|
| 947 |
|
|---|
| 948 | #ifdef VBOX_WITH_DEBUGGER
|
|---|
| 949 | /**
|
|---|
| 950 | * @callback_method_impl{FNDBGCCMD, The '.pgmpoolcheck' command.}
|
|---|
| 951 | */
|
|---|
| 952 | static DECLCALLBACK(int) pgmR3PoolCmdCheck(PCDBGCCMD pCmd, PDBGCCMDHLP pCmdHlp, PUVM pUVM, PCDBGCVAR paArgs, unsigned cArgs)
|
|---|
| 953 | {
|
|---|
| 954 | DBGC_CMDHLP_REQ_UVM_RET(pCmdHlp, pCmd, pUVM);
|
|---|
| 955 | PVM pVM = pUVM->pVM;
|
|---|
| 956 | VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
|
|---|
| 957 | DBGC_CMDHLP_ASSERT_PARSER_RET(pCmdHlp, pCmd, -1, cArgs == 0);
|
|---|
| 958 | uint32_t cErrors = 0;
|
|---|
| 959 | NOREF(paArgs);
|
|---|
| 960 |
|
|---|
| 961 | PPGMPOOL pPool = pVM->pgm.s.CTX_SUFF(pPool);
|
|---|
| 962 | for (unsigned i = 0; i < pPool->cCurPages; i++)
|
|---|
| 963 | {
|
|---|
| 964 | PPGMPOOLPAGE pPage = &pPool->aPages[i];
|
|---|
| 965 | bool fFirstMsg = true;
|
|---|
| 966 |
|
|---|
| 967 | /* Todo: cover other paging modes too. */
|
|---|
| 968 | if (pPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 969 | {
|
|---|
| 970 | PPGMSHWPTPAE pShwPT = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pPage);
|
|---|
| 971 | {
|
|---|
| 972 | PX86PTPAE pGstPT;
|
|---|
| 973 | PGMPAGEMAPLOCK LockPage;
|
|---|
| 974 | int rc = PGMPhysGCPhys2CCPtrReadOnly(pVM, pPage->GCPhys, (const void **)&pGstPT, &LockPage); AssertReleaseRC(rc);
|
|---|
| 975 |
|
|---|
| 976 | /* Check if any PTEs are out of sync. */
|
|---|
| 977 | for (unsigned j = 0; j < RT_ELEMENTS(pShwPT->a); j++)
|
|---|
| 978 | {
|
|---|
| 979 | if (PGMSHWPTEPAE_IS_P(pShwPT->a[j]))
|
|---|
| 980 | {
|
|---|
| 981 | RTHCPHYS HCPhys = NIL_RTHCPHYS;
|
|---|
| 982 | rc = PGMPhysGCPhys2HCPhys(pPool->CTX_SUFF(pVM), pGstPT->a[j].u & X86_PTE_PAE_PG_MASK, &HCPhys);
|
|---|
| 983 | if ( rc != VINF_SUCCESS
|
|---|
| 984 | || PGMSHWPTEPAE_GET_HCPHYS(pShwPT->a[j]) != HCPhys)
|
|---|
| 985 | {
|
|---|
| 986 | if (fFirstMsg)
|
|---|
| 987 | {
|
|---|
| 988 | DBGCCmdHlpPrintf(pCmdHlp, "Check pool page %RGp\n", pPage->GCPhys);
|
|---|
| 989 | fFirstMsg = false;
|
|---|
| 990 | }
|
|---|
| 991 | DBGCCmdHlpPrintf(pCmdHlp, "Mismatch HCPhys: rc=%Rrc idx=%d guest %RX64 shw=%RX64 vs %RHp\n", rc, j, pGstPT->a[j].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[j]), HCPhys);
|
|---|
| 992 | cErrors++;
|
|---|
| 993 | }
|
|---|
| 994 | else if ( PGMSHWPTEPAE_IS_RW(pShwPT->a[j])
|
|---|
| 995 | && !pGstPT->a[j].n.u1Write)
|
|---|
| 996 | {
|
|---|
| 997 | if (fFirstMsg)
|
|---|
| 998 | {
|
|---|
| 999 | DBGCCmdHlpPrintf(pCmdHlp, "Check pool page %RGp\n", pPage->GCPhys);
|
|---|
| 1000 | fFirstMsg = false;
|
|---|
| 1001 | }
|
|---|
| 1002 | DBGCCmdHlpPrintf(pCmdHlp, "Mismatch r/w gst/shw: idx=%d guest %RX64 shw=%RX64 vs %RHp\n", j, pGstPT->a[j].u, PGMSHWPTEPAE_GET_LOG(pShwPT->a[j]), HCPhys);
|
|---|
| 1003 | cErrors++;
|
|---|
| 1004 | }
|
|---|
| 1005 | }
|
|---|
| 1006 | }
|
|---|
| 1007 | PGMPhysReleasePageMappingLock(pVM, &LockPage);
|
|---|
| 1008 | }
|
|---|
| 1009 |
|
|---|
| 1010 | /* Make sure this page table can't be written to from any shadow mapping. */
|
|---|
| 1011 | RTHCPHYS HCPhysPT = NIL_RTHCPHYS;
|
|---|
| 1012 | int rc = PGMPhysGCPhys2HCPhys(pPool->CTX_SUFF(pVM), pPage->GCPhys, &HCPhysPT);
|
|---|
| 1013 | AssertMsgRC(rc, ("PGMPhysGCPhys2HCPhys failed with rc=%d for %RGp\n", rc, pPage->GCPhys));
|
|---|
| 1014 | if (rc == VINF_SUCCESS)
|
|---|
| 1015 | {
|
|---|
| 1016 | for (unsigned j = 0; j < pPool->cCurPages; j++)
|
|---|
| 1017 | {
|
|---|
| 1018 | PPGMPOOLPAGE pTempPage = &pPool->aPages[j];
|
|---|
| 1019 |
|
|---|
| 1020 | if (pTempPage->enmKind == PGMPOOLKIND_PAE_PT_FOR_PAE_PT)
|
|---|
| 1021 | {
|
|---|
| 1022 | PPGMSHWPTPAE pShwPT2 = (PPGMSHWPTPAE)PGMPOOL_PAGE_2_PTR(pPool->CTX_SUFF(pVM), pTempPage);
|
|---|
| 1023 |
|
|---|
| 1024 | for (unsigned k = 0; k < RT_ELEMENTS(pShwPT->a); k++)
|
|---|
| 1025 | {
|
|---|
| 1026 | if ( PGMSHWPTEPAE_IS_P_RW(pShwPT2->a[k])
|
|---|
| 1027 | # ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT
|
|---|
| 1028 | && !pPage->fDirty
|
|---|
| 1029 | # endif
|
|---|
| 1030 | && PGMSHWPTEPAE_GET_HCPHYS(pShwPT2->a[k]) == HCPhysPT)
|
|---|
| 1031 | {
|
|---|
| 1032 | if (fFirstMsg)
|
|---|
| 1033 | {
|
|---|
| 1034 | DBGCCmdHlpPrintf(pCmdHlp, "Check pool page %RGp\n", pPage->GCPhys);
|
|---|
| 1035 | fFirstMsg = false;
|
|---|
| 1036 | }
|
|---|
| 1037 | DBGCCmdHlpPrintf(pCmdHlp, "Mismatch: r/w: GCPhys=%RGp idx=%d shw %RX64 %RX64\n", pTempPage->GCPhys, k, PGMSHWPTEPAE_GET_LOG(pShwPT->a[k]), PGMSHWPTEPAE_GET_LOG(pShwPT2->a[k]));
|
|---|
| 1038 | cErrors++;
|
|---|
| 1039 | }
|
|---|
| 1040 | }
|
|---|
| 1041 | }
|
|---|
| 1042 | }
|
|---|
| 1043 | }
|
|---|
| 1044 | }
|
|---|
| 1045 | }
|
|---|
| 1046 | if (cErrors > 0)
|
|---|
| 1047 | return DBGCCmdHlpFail(pCmdHlp, pCmd, "Found %#x errors", cErrors);
|
|---|
| 1048 | return VINF_SUCCESS;
|
|---|
| 1049 | }
|
|---|
| 1050 | #endif /* VBOX_WITH_DEBUGGER */
|
|---|
