/* $Id: PGMPhys.cpp 24349 2009-11-04 17:37:15Z vboxsync $ */ /** @file * PGM - Page Manager and Monitor, Physical Memory Addressing. */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ /******************************************************************************* * Header Files * *******************************************************************************/ #define LOG_GROUP LOG_GROUP_PGM_PHYS #include #include #include #include #include #include #include "PGMInternal.h" #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Defined Constants And Macros * *******************************************************************************/ /** The number of pages to free in one batch. */ #define PGMPHYS_FREE_PAGE_BATCH_SIZE 128 /******************************************************************************* * Internal Functions * *******************************************************************************/ static DECLCALLBACK(int) pgmR3PhysRomWriteHandler(PVM pVM, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser); static int pgmPhysFreePage(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t *pcPendingPages, PPGMPAGE pPage, RTGCPHYS GCPhys); /* * PGMR3PhysReadU8-64 * PGMR3PhysWriteU8-64 */ #define PGMPHYSFN_READNAME PGMR3PhysReadU8 #define PGMPHYSFN_WRITENAME PGMR3PhysWriteU8 #define PGMPHYS_DATASIZE 1 #define PGMPHYS_DATATYPE uint8_t #include "PGMPhysRWTmpl.h" #define PGMPHYSFN_READNAME PGMR3PhysReadU16 #define PGMPHYSFN_WRITENAME PGMR3PhysWriteU16 #define PGMPHYS_DATASIZE 2 #define PGMPHYS_DATATYPE uint16_t #include "PGMPhysRWTmpl.h" #define PGMPHYSFN_READNAME PGMR3PhysReadU32 #define PGMPHYSFN_WRITENAME PGMR3PhysWriteU32 #define PGMPHYS_DATASIZE 4 #define PGMPHYS_DATATYPE uint32_t #include "PGMPhysRWTmpl.h" #define PGMPHYSFN_READNAME PGMR3PhysReadU64 #define PGMPHYSFN_WRITENAME PGMR3PhysWriteU64 #define PGMPHYS_DATASIZE 8 #define PGMPHYS_DATATYPE uint64_t #include "PGMPhysRWTmpl.h" /** * EMT worker for PGMR3PhysReadExternal. */ static DECLCALLBACK(int) pgmR3PhysReadExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, void *pvBuf, size_t cbRead) { PGMPhysRead(pVM, *pGCPhys, pvBuf, cbRead); return VINF_SUCCESS; } /** * Write to physical memory, external users. * * @returns VBox status code. * @retval VINF_SUCCESS. * * @param pVM VM Handle. * @param GCPhys Physical address to write to. * @param pvBuf What to write. * @param cbWrite How many bytes to write. * * @thread Any but EMTs. */ VMMR3DECL(int) PGMR3PhysReadExternal(PVM pVM, RTGCPHYS GCPhys, void *pvBuf, size_t cbRead) { VM_ASSERT_OTHER_THREAD(pVM); AssertMsgReturn(cbRead > 0, ("don't even think about reading zero bytes!\n"), VINF_SUCCESS); LogFlow(("PGMR3PhysReadExternal: %RGp %d\n", GCPhys, cbRead)); pgmLock(pVM); /* * Copy loop on ram ranges. */ PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRanges); for (;;) { /* Find range. */ while (pRam && GCPhys > pRam->GCPhysLast) pRam = pRam->CTX_SUFF(pNext); /* Inside range or not? */ if (pRam && GCPhys >= pRam->GCPhys) { /* * Must work our way thru this page by page. */ RTGCPHYS off = GCPhys - pRam->GCPhys; while (off < pRam->cb) { unsigned iPage = off >> PAGE_SHIFT; PPGMPAGE pPage = &pRam->aPages[iPage]; /* * If the page has an ALL access handler, we'll have to * delegate the job to EMT. */ if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) { pgmUnlock(pVM); return VMR3ReqCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysReadExternalEMT, 4, pVM, &GCPhys, pvBuf, cbRead); } Assert(!PGM_PAGE_IS_MMIO(pPage)); /* * Simple stuff, go ahead. */ size_t cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK); if (cb > cbRead) cb = cbRead; const void *pvSrc; int rc = pgmPhysGCPhys2CCPtrInternalReadOnly(pVM, pPage, pRam->GCPhys + off, &pvSrc); if (RT_SUCCESS(rc)) memcpy(pvBuf, pvSrc, cb); else { AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternalReadOnly failed on %RGp / %R[pgmpage] -> %Rrc\n", pRam->GCPhys + off, pPage, rc)); memset(pvBuf, 0xff, cb); } /* next page */ if (cb >= cbRead) { pgmUnlock(pVM); return VINF_SUCCESS; } cbRead -= cb; off += cb; GCPhys += cb; pvBuf = (char *)pvBuf + cb; } /* walk pages in ram range. */ } else { LogFlow(("PGMPhysRead: Unassigned %RGp size=%u\n", GCPhys, cbRead)); /* * Unassigned address space. */ if (!pRam) break; size_t cb = pRam->GCPhys - GCPhys; if (cb >= cbRead) { memset(pvBuf, 0xff, cbRead); break; } memset(pvBuf, 0xff, cb); cbRead -= cb; pvBuf = (char *)pvBuf + cb; GCPhys += cb; } } /* Ram range walk */ pgmUnlock(pVM); return VINF_SUCCESS; } /** * EMT worker for PGMR3PhysWriteExternal. */ static DECLCALLBACK(int) pgmR3PhysWriteExternalEMT(PVM pVM, PRTGCPHYS pGCPhys, const void *pvBuf, size_t cbWrite) { /** @todo VERR_EM_NO_MEMORY */ PGMPhysWrite(pVM, *pGCPhys, pvBuf, cbWrite); return VINF_SUCCESS; } /** * Write to physical memory, external users. * * @returns VBox status code. * @retval VINF_SUCCESS. * @retval VERR_EM_NO_MEMORY. * * @param pVM VM Handle. * @param GCPhys Physical address to write to. * @param pvBuf What to write. * @param cbWrite How many bytes to write. * @param pszWho Who is writing. For tracking down who is writing * after we've saved the state. * * @thread Any but EMTs. */ VMMDECL(int) PGMR3PhysWriteExternal(PVM pVM, RTGCPHYS GCPhys, const void *pvBuf, size_t cbWrite, const char *pszWho) { VM_ASSERT_OTHER_THREAD(pVM); AssertMsg(!pVM->pgm.s.fNoMorePhysWrites, ("Calling PGMR3PhysWriteExternal after pgmR3Save()! GCPhys=%RGp cbWrite=%#x pszWho=%s\n", GCPhys, cbWrite, pszWho)); AssertMsgReturn(cbWrite > 0, ("don't even think about writing zero bytes!\n"), VINF_SUCCESS); LogFlow(("PGMR3PhysWriteExternal: %RGp %d\n", GCPhys, cbWrite)); pgmLock(pVM); /* * Copy loop on ram ranges, stop when we hit something difficult. */ PPGMRAMRANGE pRam = pVM->pgm.s.CTX_SUFF(pRamRanges); for (;;) { /* Find range. */ while (pRam && GCPhys > pRam->GCPhysLast) pRam = pRam->CTX_SUFF(pNext); /* Inside range or not? */ if (pRam && GCPhys >= pRam->GCPhys) { /* * Must work our way thru this page by page. */ RTGCPTR off = GCPhys - pRam->GCPhys; while (off < pRam->cb) { RTGCPTR iPage = off >> PAGE_SHIFT; PPGMPAGE pPage = &pRam->aPages[iPage]; /* * It the page is in any way problematic, we have to * do the work on the EMT. Anything that needs to be made * writable or involves access handlers is problematic. */ if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage) || PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED) { pgmUnlock(pVM); return VMR3ReqCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysWriteExternalEMT, 4, pVM, &GCPhys, pvBuf, cbWrite); } Assert(!PGM_PAGE_IS_MMIO(pPage)); /* * Simple stuff, go ahead. */ size_t cb = PAGE_SIZE - (off & PAGE_OFFSET_MASK); if (cb > cbWrite) cb = cbWrite; void *pvDst; int rc = pgmPhysGCPhys2CCPtrInternal(pVM, pPage, pRam->GCPhys + off, &pvDst); if (RT_SUCCESS(rc)) memcpy(pvDst, pvBuf, cb); else AssertLogRelMsgFailed(("pgmPhysGCPhys2CCPtrInternal failed on %RGp / %R[pgmpage] -> %Rrc\n", pRam->GCPhys + off, pPage, rc)); /* next page */ if (cb >= cbWrite) { pgmUnlock(pVM); return VINF_SUCCESS; } cbWrite -= cb; off += cb; GCPhys += cb; pvBuf = (const char *)pvBuf + cb; } /* walk pages in ram range */ } else { /* * Unassigned address space, skip it. */ if (!pRam) break; size_t cb = pRam->GCPhys - GCPhys; if (cb >= cbWrite) break; cbWrite -= cb; pvBuf = (const char *)pvBuf + cb; GCPhys += cb; } } /* Ram range walk */ pgmUnlock(pVM); return VINF_SUCCESS; } /** * VMR3ReqCall worker for PGMR3PhysGCPhys2CCPtrExternal to make pages writable. * * @returns see PGMR3PhysGCPhys2CCPtrExternal * @param pVM The VM handle. * @param pGCPhys Pointer to the guest physical address. * @param ppv Where to store the mapping address. * @param pLock Where to store the lock. */ static DECLCALLBACK(int) pgmR3PhysGCPhys2CCPtrDelegated(PVM pVM, PRTGCPHYS pGCPhys, void **ppv, PPGMPAGEMAPLOCK pLock) { /* * Just hand it to PGMPhysGCPhys2CCPtr and check that it's not a page with * an access handler after it succeeds. */ int rc = pgmLock(pVM); AssertRCReturn(rc, rc); rc = PGMPhysGCPhys2CCPtr(pVM, *pGCPhys, ppv, pLock); if (RT_SUCCESS(rc)) { PPGMPAGEMAPTLBE pTlbe; int rc2 = pgmPhysPageQueryTlbe(&pVM->pgm.s, *pGCPhys, &pTlbe); AssertFatalRC(rc2); PPGMPAGE pPage = pTlbe->pPage; if (PGM_PAGE_IS_MMIO(pPage)) { PGMPhysReleasePageMappingLock(pVM, pLock); rc = VERR_PGM_PHYS_PAGE_RESERVED; } else if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage) #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT || pgmPoolIsDirtyPage(pVM, *pGCPhys) #endif ) { /* We *must* flush any corresponding pgm pool page here, otherwise we'll * not be informed about writes and keep bogus gst->shw mappings around. */ pgmPoolFlushPageByGCPhys(pVM, *pGCPhys); Assert(!PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)); /** @todo r=bird: return VERR_PGM_PHYS_PAGE_RESERVED here if it still has * active handlers, see the PGMR3PhysGCPhys2CCPtrExternal docs. */ } } pgmUnlock(pVM); return rc; } /** * Requests the mapping of a guest page into ring-3, external threads. * * When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to * release it. * * This API will assume your intention is to write to the page, and will * therefore replace shared and zero pages. If you do not intend to modify the * page, use the PGMR3PhysGCPhys2CCPtrReadOnlyExternal() API. * * @returns VBox status code. * @retval VINF_SUCCESS on success. * @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical * backing or if the page has any active access handlers. The caller * must fall back on using PGMR3PhysWriteExternal. * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address. * * @param pVM The VM handle. * @param GCPhys The guest physical address of the page that should be mapped. * @param ppv Where to store the address corresponding to GCPhys. * @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs. * * @remark Avoid calling this API from within critical sections (other than the * PGM one) because of the deadlock risk when we have to delegating the * task to an EMT. * @thread Any. */ VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrExternal(PVM pVM, RTGCPHYS GCPhys, void **ppv, PPGMPAGEMAPLOCK pLock) { AssertPtr(ppv); AssertPtr(pLock); Assert(VM_IS_EMT(pVM) || !PGMIsLockOwner(pVM)); int rc = pgmLock(pVM); AssertRCReturn(rc, rc); /* * Query the Physical TLB entry for the page (may fail). */ PPGMPAGEMAPTLBE pTlbe; rc = pgmPhysPageQueryTlbe(&pVM->pgm.s, GCPhys, &pTlbe); if (RT_SUCCESS(rc)) { PPGMPAGE pPage = pTlbe->pPage; if (PGM_PAGE_IS_MMIO(pPage)) rc = VERR_PGM_PHYS_PAGE_RESERVED; else { /* * If the page is shared, the zero page, or being write monitored * it must be converted to an page that's writable if possible. * This has to be done on an EMT. */ if ( PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage) #ifdef PGMPOOL_WITH_OPTIMIZED_DIRTY_PT || pgmPoolIsDirtyPage(pVM, GCPhys) #endif || RT_UNLIKELY(PGM_PAGE_GET_STATE(pPage) != PGM_PAGE_STATE_ALLOCATED)) { pgmUnlock(pVM); return VMR3ReqCallWait(pVM, VMCPUID_ANY, (PFNRT)pgmR3PhysGCPhys2CCPtrDelegated, 4, pVM, &GCPhys, ppv, pLock); } /* * Now, just perform the locking and calculate the return address. */ PPGMPAGEMAP pMap = pTlbe->pMap; if (pMap) pMap->cRefs++; unsigned cLocks = PGM_PAGE_GET_WRITE_LOCKS(pPage); if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1)) { if (cLocks == 0) pVM->pgm.s.cWriteLockedPages++; PGM_PAGE_INC_WRITE_LOCKS(pPage); } else if (cLocks != PGM_PAGE_GET_WRITE_LOCKS(pPage)) { PGM_PAGE_INC_WRITE_LOCKS(pPage); AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent write locked state!\n", GCPhys, pPage)); if (pMap) pMap->cRefs++; /* Extra ref to prevent it from going away. */ } *ppv = (void *)((uintptr_t)pTlbe->pv | (GCPhys & PAGE_OFFSET_MASK)); pLock->uPageAndType = (uintptr_t)pPage | PGMPAGEMAPLOCK_TYPE_WRITE; pLock->pvMap = pMap; } } pgmUnlock(pVM); return rc; } /** * Requests the mapping of a guest page into ring-3, external threads. * * When you're done with the page, call PGMPhysReleasePageMappingLock() ASAP to * release it. * * @returns VBox status code. * @retval VINF_SUCCESS on success. * @retval VERR_PGM_PHYS_PAGE_RESERVED it it's a valid page but has no physical * backing or if the page as an active ALL access handler. The caller * must fall back on using PGMPhysRead. * @retval VERR_PGM_INVALID_GC_PHYSICAL_ADDRESS if it's not a valid physical address. * * @param pVM The VM handle. * @param GCPhys The guest physical address of the page that should be mapped. * @param ppv Where to store the address corresponding to GCPhys. * @param pLock Where to store the lock information that PGMPhysReleasePageMappingLock needs. * * @remark Avoid calling this API from within critical sections (other than * the PGM one) because of the deadlock risk. * @thread Any. */ VMMR3DECL(int) PGMR3PhysGCPhys2CCPtrReadOnlyExternal(PVM pVM, RTGCPHYS GCPhys, void const **ppv, PPGMPAGEMAPLOCK pLock) { int rc = pgmLock(pVM); AssertRCReturn(rc, rc); /* * Query the Physical TLB entry for the page (may fail). */ PPGMPAGEMAPTLBE pTlbe; rc = pgmPhysPageQueryTlbe(&pVM->pgm.s, GCPhys, &pTlbe); if (RT_SUCCESS(rc)) { PPGMPAGE pPage = pTlbe->pPage; #if 1 /* MMIO pages doesn't have any readable backing. */ if (PGM_PAGE_IS_MMIO(pPage)) rc = VERR_PGM_PHYS_PAGE_RESERVED; #else if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) rc = VERR_PGM_PHYS_PAGE_RESERVED; #endif else { /* * Now, just perform the locking and calculate the return address. */ PPGMPAGEMAP pMap = pTlbe->pMap; if (pMap) pMap->cRefs++; unsigned cLocks = PGM_PAGE_GET_READ_LOCKS(pPage); if (RT_LIKELY(cLocks < PGM_PAGE_MAX_LOCKS - 1)) { if (cLocks == 0) pVM->pgm.s.cReadLockedPages++; PGM_PAGE_INC_READ_LOCKS(pPage); } else if (cLocks != PGM_PAGE_GET_READ_LOCKS(pPage)) { PGM_PAGE_INC_READ_LOCKS(pPage); AssertMsgFailed(("%RGp / %R[pgmpage] is entering permanent readonly locked state!\n", GCPhys, pPage)); if (pMap) pMap->cRefs++; /* Extra ref to prevent it from going away. */ } *ppv = (void *)((uintptr_t)pTlbe->pv | (GCPhys & PAGE_OFFSET_MASK)); pLock->uPageAndType = (uintptr_t)pPage | PGMPAGEMAPLOCK_TYPE_READ; pLock->pvMap = pMap; } } pgmUnlock(pVM); return rc; } /** * Relinks the RAM ranges using the pSelfRC and pSelfR0 pointers. * * Called when anything was relocated. * * @param pVM Pointer to the shared VM structure. */ void pgmR3PhysRelinkRamRanges(PVM pVM) { PPGMRAMRANGE pCur; #ifdef VBOX_STRICT for (pCur = pVM->pgm.s.pRamRangesR3; pCur; pCur = pCur->pNextR3) { Assert((pCur->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pCur->pSelfR0 == MMHyperCCToR0(pVM, pCur)); Assert((pCur->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pCur->pSelfRC == MMHyperCCToRC(pVM, pCur)); Assert((pCur->GCPhys & PAGE_OFFSET_MASK) == 0); Assert((pCur->GCPhysLast & PAGE_OFFSET_MASK) == PAGE_OFFSET_MASK); Assert((pCur->cb & PAGE_OFFSET_MASK) == 0); Assert(pCur->cb == pCur->GCPhysLast - pCur->GCPhys + 1); for (PPGMRAMRANGE pCur2 = pVM->pgm.s.pRamRangesR3; pCur2; pCur2 = pCur2->pNextR3) Assert( pCur2 == pCur || strcmp(pCur2->pszDesc, pCur->pszDesc)); /** @todo fix MMIO ranges!! */ } #endif pCur = pVM->pgm.s.pRamRangesR3; if (pCur) { pVM->pgm.s.pRamRangesR0 = pCur->pSelfR0; pVM->pgm.s.pRamRangesRC = pCur->pSelfRC; for (; pCur->pNextR3; pCur = pCur->pNextR3) { pCur->pNextR0 = pCur->pNextR3->pSelfR0; pCur->pNextRC = pCur->pNextR3->pSelfRC; } Assert(pCur->pNextR0 == NIL_RTR0PTR); Assert(pCur->pNextRC == NIL_RTRCPTR); } else { Assert(pVM->pgm.s.pRamRangesR0 == NIL_RTR0PTR); Assert(pVM->pgm.s.pRamRangesRC == NIL_RTRCPTR); } ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen); } /** * Links a new RAM range into the list. * * @param pVM Pointer to the shared VM structure. * @param pNew Pointer to the new list entry. * @param pPrev Pointer to the previous list entry. If NULL, insert as head. */ static void pgmR3PhysLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, PPGMRAMRANGE pPrev) { AssertMsg(pNew->pszDesc, ("%RGp-%RGp\n", pNew->GCPhys, pNew->GCPhysLast)); Assert((pNew->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pNew->pSelfR0 == MMHyperCCToR0(pVM, pNew)); Assert((pNew->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pNew->pSelfRC == MMHyperCCToRC(pVM, pNew)); pgmLock(pVM); PPGMRAMRANGE pRam = pPrev ? pPrev->pNextR3 : pVM->pgm.s.pRamRangesR3; pNew->pNextR3 = pRam; pNew->pNextR0 = pRam ? pRam->pSelfR0 : NIL_RTR0PTR; pNew->pNextRC = pRam ? pRam->pSelfRC : NIL_RTRCPTR; if (pPrev) { pPrev->pNextR3 = pNew; pPrev->pNextR0 = pNew->pSelfR0; pPrev->pNextRC = pNew->pSelfRC; } else { pVM->pgm.s.pRamRangesR3 = pNew; pVM->pgm.s.pRamRangesR0 = pNew->pSelfR0; pVM->pgm.s.pRamRangesRC = pNew->pSelfRC; } ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen); pgmUnlock(pVM); } /** * Unlink an existing RAM range from the list. * * @param pVM Pointer to the shared VM structure. * @param pRam Pointer to the new list entry. * @param pPrev Pointer to the previous list entry. If NULL, insert as head. */ static void pgmR3PhysUnlinkRamRange2(PVM pVM, PPGMRAMRANGE pRam, PPGMRAMRANGE pPrev) { Assert(pPrev ? pPrev->pNextR3 == pRam : pVM->pgm.s.pRamRangesR3 == pRam); Assert((pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pRam->pSelfR0 == MMHyperCCToR0(pVM, pRam)); Assert((pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING) || pRam->pSelfRC == MMHyperCCToRC(pVM, pRam)); pgmLock(pVM); PPGMRAMRANGE pNext = pRam->pNextR3; if (pPrev) { pPrev->pNextR3 = pNext; pPrev->pNextR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR; pPrev->pNextRC = pNext ? pNext->pSelfRC : NIL_RTRCPTR; } else { Assert(pVM->pgm.s.pRamRangesR3 == pRam); pVM->pgm.s.pRamRangesR3 = pNext; pVM->pgm.s.pRamRangesR0 = pNext ? pNext->pSelfR0 : NIL_RTR0PTR; pVM->pgm.s.pRamRangesRC = pNext ? pNext->pSelfRC : NIL_RTRCPTR; } ASMAtomicIncU32(&pVM->pgm.s.idRamRangesGen); pgmUnlock(pVM); } /** * Unlink an existing RAM range from the list. * * @param pVM Pointer to the shared VM structure. * @param pRam Pointer to the new list entry. */ static void pgmR3PhysUnlinkRamRange(PVM pVM, PPGMRAMRANGE pRam) { pgmLock(pVM); /* find prev. */ PPGMRAMRANGE pPrev = NULL; PPGMRAMRANGE pCur = pVM->pgm.s.pRamRangesR3; while (pCur != pRam) { pPrev = pCur; pCur = pCur->pNextR3; } AssertFatal(pCur); pgmR3PhysUnlinkRamRange2(pVM, pRam, pPrev); pgmUnlock(pVM); } /** * Frees a range of pages, replacing them with ZERO pages of the specified type. * * @returns VBox status code. * @param pVM The VM handle. * @param pRam The RAM range in which the pages resides. * @param GCPhys The address of the first page. * @param GCPhysLast The address of the last page. * @param uType The page type to replace then with. */ static int pgmR3PhysFreePageRange(PVM pVM, PPGMRAMRANGE pRam, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast, uint8_t uType) { uint32_t cPendingPages = 0; PGMMFREEPAGESREQ pReq; int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE); AssertLogRelRCReturn(rc, rc); /* Itegerate the pages. */ PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cPagesLeft = ((GCPhysLast - GCPhys) >> PAGE_SHIFT) + 1; while (cPagesLeft-- > 0) { rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPageDst, GCPhys); AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */ PGM_PAGE_SET_TYPE(pPageDst, uType); GCPhys += PAGE_SIZE; pPageDst++; } if (cPendingPages) { rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages); AssertLogRelRCReturn(rc, rc); } GMMR3FreePagesCleanup(pReq); return rc; } /** * PGMR3PhysRegisterRam worker that initializes and links a RAM range. * * @param pVM The VM handle. * @param pNew The new RAM range. * @param GCPhys The address of the RAM range. * @param GCPhysLast The last address of the RAM range. * @param RCPtrNew The RC address if the range is floating. NIL_RTRCPTR * if in HMA. * @param R0PtrNew Ditto for R0. * @param pszDesc The description. * @param pPrev The previous RAM range (for linking). */ static void pgmR3PhysInitAndLinkRamRange(PVM pVM, PPGMRAMRANGE pNew, RTGCPHYS GCPhys, RTGCPHYS GCPhysLast, RTRCPTR RCPtrNew, RTR0PTR R0PtrNew, const char *pszDesc, PPGMRAMRANGE pPrev) { /* * Initialize the range. */ pNew->pSelfR0 = R0PtrNew != NIL_RTR0PTR ? R0PtrNew : MMHyperCCToR0(pVM, pNew); pNew->pSelfRC = RCPtrNew != NIL_RTRCPTR ? RCPtrNew : MMHyperCCToRC(pVM, pNew); pNew->GCPhys = GCPhys; pNew->GCPhysLast = GCPhysLast; pNew->cb = GCPhysLast - GCPhys + 1; pNew->pszDesc = pszDesc; pNew->fFlags = RCPtrNew != NIL_RTRCPTR ? PGM_RAM_RANGE_FLAGS_FLOATING : 0; pNew->pvR3 = NULL; pNew->paLSPages = NULL; uint32_t const cPages = pNew->cb >> PAGE_SHIFT; RTGCPHYS iPage = cPages; while (iPage-- > 0) PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_RAM); /* Update the page count stats. */ pVM->pgm.s.cZeroPages += cPages; pVM->pgm.s.cAllPages += cPages; /* * Link it. */ pgmR3PhysLinkRamRange(pVM, pNew, pPrev); } /** * Relocate a floating RAM range. * * @copydoc FNPGMRELOCATE. */ static DECLCALLBACK(bool) pgmR3PhysRamRangeRelocate(PVM pVM, RTGCPTR GCPtrOld, RTGCPTR GCPtrNew, PGMRELOCATECALL enmMode, void *pvUser) { PPGMRAMRANGE pRam = (PPGMRAMRANGE)pvUser; Assert(pRam->fFlags & PGM_RAM_RANGE_FLAGS_FLOATING); Assert(pRam->pSelfRC == GCPtrOld + PAGE_SIZE); switch (enmMode) { case PGMRELOCATECALL_SUGGEST: return true; case PGMRELOCATECALL_RELOCATE: { /* Update myself and then relink all the ranges. */ pgmLock(pVM); pRam->pSelfRC = (RTRCPTR)(GCPtrNew + PAGE_SIZE); pgmR3PhysRelinkRamRanges(pVM); pgmUnlock(pVM); return true; } default: AssertFailedReturn(false); } } /** * PGMR3PhysRegisterRam worker that registers a high chunk. * * @returns VBox status code. * @param pVM The VM handle. * @param GCPhys The address of the RAM. * @param cRamPages The number of RAM pages to register. * @param cbChunk The size of the PGMRAMRANGE guest mapping. * @param iChunk The chunk number. * @param pszDesc The RAM range description. * @param ppPrev Previous RAM range pointer. In/Out. */ static int pgmR3PhysRegisterHighRamChunk(PVM pVM, RTGCPHYS GCPhys, uint32_t cRamPages, uint32_t cbChunk, uint32_t iChunk, const char *pszDesc, PPGMRAMRANGE *ppPrev) { const char *pszDescChunk = iChunk == 0 ? pszDesc : MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s (#%u)", pszDesc, iChunk + 1); AssertReturn(pszDescChunk, VERR_NO_MEMORY); /* * Allocate memory for the new chunk. */ size_t const cChunkPages = RT_ALIGN_Z(RT_UOFFSETOF(PGMRAMRANGE, aPages[cRamPages]), PAGE_SIZE) >> PAGE_SHIFT; PSUPPAGE paChunkPages = (PSUPPAGE)RTMemTmpAllocZ(sizeof(SUPPAGE) * cChunkPages); AssertReturn(paChunkPages, VERR_NO_TMP_MEMORY); RTR0PTR R0PtrChunk = NIL_RTR0PTR; void *pvChunk = NULL; int rc = SUPR3PageAllocEx(cChunkPages, 0 /*fFlags*/, &pvChunk, #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE VMMIsHwVirtExtForced(pVM) ? &R0PtrChunk : NULL, #else NULL, #endif paChunkPages); if (RT_SUCCESS(rc)) { #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE if (!VMMIsHwVirtExtForced(pVM)) R0PtrChunk = NIL_RTR0PTR; #else R0PtrChunk = (uintptr_t)pvChunk; #endif memset(pvChunk, 0, cChunkPages << PAGE_SHIFT); PPGMRAMRANGE pNew = (PPGMRAMRANGE)pvChunk; /* * Create a mapping and map the pages into it. * We push these in below the HMA. */ RTGCPTR GCPtrChunkMap = pVM->pgm.s.GCPtrPrevRamRangeMapping - cbChunk; rc = PGMR3MapPT(pVM, GCPtrChunkMap, cbChunk, 0 /*fFlags*/, pgmR3PhysRamRangeRelocate, pNew, pszDescChunk); if (RT_SUCCESS(rc)) { pVM->pgm.s.GCPtrPrevRamRangeMapping = GCPtrChunkMap; RTGCPTR const GCPtrChunk = GCPtrChunkMap + PAGE_SIZE; RTGCPTR GCPtrPage = GCPtrChunk; for (uint32_t iPage = 0; iPage < cChunkPages && RT_SUCCESS(rc); iPage++, GCPtrPage += PAGE_SIZE) rc = PGMMap(pVM, GCPtrPage, paChunkPages[iPage].Phys, PAGE_SIZE, 0); if (RT_SUCCESS(rc)) { /* * Ok, init and link the range. */ pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhys + ((RTGCPHYS)cRamPages << PAGE_SHIFT) - 1, (RTRCPTR)GCPtrChunk, R0PtrChunk, pszDescChunk, *ppPrev); *ppPrev = pNew; } } if (RT_FAILURE(rc)) SUPR3PageFreeEx(pvChunk, cChunkPages); } RTMemTmpFree(paChunkPages); return rc; } /** * Sets up a range RAM. * * This will check for conflicting registrations, make a resource * reservation for the memory (with GMM), and setup the per-page * tracking structures (PGMPAGE). * * @returns VBox stutus code. * @param pVM Pointer to the shared VM structure. * @param GCPhys The physical address of the RAM. * @param cb The size of the RAM. * @param pszDesc The description - not copied, so, don't free or change it. */ VMMR3DECL(int) PGMR3PhysRegisterRam(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, const char *pszDesc) { /* * Validate input. */ Log(("PGMR3PhysRegisterRam: GCPhys=%RGp cb=%RGp pszDesc=%s\n", GCPhys, cb, pszDesc)); AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER); AssertReturn(RT_ALIGN_T(cb, PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER); AssertReturn(cb > 0, VERR_INVALID_PARAMETER); RTGCPHYS GCPhysLast = GCPhys + (cb - 1); AssertMsgReturn(GCPhysLast > GCPhys, ("The range wraps! GCPhys=%RGp cb=%RGp\n", GCPhys, cb), VERR_INVALID_PARAMETER); AssertPtrReturn(pszDesc, VERR_INVALID_POINTER); VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); pgmLock(pVM); /* * Find range location and check for conflicts. * (We don't lock here because the locking by EMT is only required on update.) */ PPGMRAMRANGE pPrev = NULL; PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam && GCPhysLast >= pRam->GCPhys) { if ( GCPhysLast >= pRam->GCPhys && GCPhys <= pRam->GCPhysLast) AssertLogRelMsgFailedReturn(("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n", GCPhys, GCPhysLast, pszDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc), VERR_PGM_RAM_CONFLICT); /* next */ pPrev = pRam; pRam = pRam->pNextR3; } /* * Register it with GMM (the API bitches). */ const RTGCPHYS cPages = cb >> PAGE_SHIFT; int rc = MMR3IncreaseBaseReservation(pVM, cPages); if (RT_FAILURE(rc)) { pgmUnlock(pVM); return rc; } if ( GCPhys >= _4G && cPages > 256) { /* * The PGMRAMRANGE structures for the high memory can get very big. * In order to avoid SUPR3PageAllocEx allocation failures due to the * allocation size limit there and also to avoid being unable to find * guest mapping space for them, we split this memory up into 4MB in * (potential) raw-mode configs and 16MB chunks in forced AMD-V/VT-x * mode. * * The first and last page of each mapping are guard pages and marked * not-present. So, we've got 4186112 and 16769024 bytes available for * the PGMRAMRANGE structure. * * Note! The sizes used here will influence the saved state. */ uint32_t cbChunk; uint32_t cPagesPerChunk; if (VMMIsHwVirtExtForced(pVM)) { cbChunk = 16U*_1M; cPagesPerChunk = 1048048; /* max ~1048059 */ AssertCompile(sizeof(PGMRAMRANGE) + sizeof(PGMPAGE) * 1048048 < 16U*_1M - PAGE_SIZE * 2); } else { cbChunk = 4U*_1M; cPagesPerChunk = 261616; /* max ~261627 */ AssertCompile(sizeof(PGMRAMRANGE) + sizeof(PGMPAGE) * 261616 < 4U*_1M - PAGE_SIZE * 2); } AssertRelease(RT_UOFFSETOF(PGMRAMRANGE, aPages[cPagesPerChunk]) + PAGE_SIZE * 2 <= cbChunk); RTGCPHYS cPagesLeft = cPages; RTGCPHYS GCPhysChunk = GCPhys; uint32_t iChunk = 0; while (cPagesLeft > 0) { uint32_t cPagesInChunk = cPagesLeft; if (cPagesInChunk > cPagesPerChunk) cPagesInChunk = cPagesPerChunk; rc = pgmR3PhysRegisterHighRamChunk(pVM, GCPhysChunk, cPagesInChunk, cbChunk, iChunk, pszDesc, &pPrev); AssertRCReturn(rc, rc); /* advance */ GCPhysChunk += (RTGCPHYS)cPagesInChunk << PAGE_SHIFT; cPagesLeft -= cPagesInChunk; iChunk++; } } else { /* * Allocate, initialize and link the new RAM range. */ const size_t cbRamRange = RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]); PPGMRAMRANGE pNew; rc = MMR3HyperAllocOnceNoRel(pVM, cbRamRange, 0, MM_TAG_PGM_PHYS, (void **)&pNew); AssertLogRelMsgRCReturn(rc, ("cbRamRange=%zu\n", cbRamRange), rc); pgmR3PhysInitAndLinkRamRange(pVM, pNew, GCPhys, GCPhysLast, NIL_RTRCPTR, NIL_RTR0PTR, pszDesc, pPrev); } pgmUnlock(pVM); /* * Notify REM. */ REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_RAM); return VINF_SUCCESS; } /** * Worker called by PGMR3InitFinalize if we're configured to pre-allocate RAM. * * We do this late in the init process so that all the ROM and MMIO ranges have * been registered already and we don't go wasting memory on them. * * @returns VBox status code. * * @param pVM Pointer to the shared VM structure. */ int pgmR3PhysRamPreAllocate(PVM pVM) { Assert(pVM->pgm.s.fRamPreAlloc); Log(("pgmR3PhysRamPreAllocate: enter\n")); /* * Walk the RAM ranges and allocate all RAM pages, halt at * the first allocation error. */ uint64_t cPages = 0; uint64_t NanoTS = RTTimeNanoTS(); pgmLock(pVM); for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; pRam; pRam = pRam->pNextR3) { PPGMPAGE pPage = &pRam->aPages[0]; RTGCPHYS GCPhys = pRam->GCPhys; uint32_t cLeft = pRam->cb >> PAGE_SHIFT; while (cLeft-- > 0) { if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM) { switch (PGM_PAGE_GET_STATE(pPage)) { case PGM_PAGE_STATE_ZERO: { int rc = pgmPhysAllocPage(pVM, pPage, GCPhys); if (RT_FAILURE(rc)) { LogRel(("PGM: RAM Pre-allocation failed at %RGp (in %s) with rc=%Rrc\n", GCPhys, pRam->pszDesc, rc)); pgmUnlock(pVM); return rc; } cPages++; break; } case PGM_PAGE_STATE_ALLOCATED: case PGM_PAGE_STATE_WRITE_MONITORED: case PGM_PAGE_STATE_SHARED: /* nothing to do here. */ break; } } /* next */ pPage++; GCPhys += PAGE_SIZE; } } pgmUnlock(pVM); NanoTS = RTTimeNanoTS() - NanoTS; LogRel(("PGM: Pre-allocated %llu pages in %llu ms\n", cPages, NanoTS / 1000000)); Log(("pgmR3PhysRamPreAllocate: returns VINF_SUCCESS\n")); return VINF_SUCCESS; } /** * Resets (zeros) the RAM. * * ASSUMES that the caller owns the PGM lock. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. */ int pgmR3PhysRamReset(PVM pVM) { Assert(PGMIsLockOwner(pVM)); /* * We batch up pages before freeing them. */ uint32_t cPendingPages = 0; PGMMFREEPAGESREQ pReq; int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE); AssertLogRelRCReturn(rc, rc); /* * Walk the ram ranges. */ for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; pRam; pRam = pRam->pNextR3) { uint32_t iPage = pRam->cb >> PAGE_SHIFT; AssertMsg(((RTGCPHYS)iPage << PAGE_SHIFT) == pRam->cb, ("%RGp %RGp\n", (RTGCPHYS)iPage << PAGE_SHIFT, pRam->cb)); if (!pVM->pgm.s.fRamPreAlloc) { /* Replace all RAM pages by ZERO pages. */ while (iPage-- > 0) { PPGMPAGE pPage = &pRam->aPages[iPage]; switch (PGM_PAGE_GET_TYPE(pPage)) { case PGMPAGETYPE_RAM: if (!PGM_PAGE_IS_ZERO(pPage)) { rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT)); AssertLogRelRCReturn(rc, rc); } break; case PGMPAGETYPE_MMIO2_ALIAS_MMIO: pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT)); break; case PGMPAGETYPE_MMIO2: case PGMPAGETYPE_ROM_SHADOW: /* handled by pgmR3PhysRomReset. */ case PGMPAGETYPE_ROM: case PGMPAGETYPE_MMIO: break; default: AssertFailed(); } } /* for each page */ } else { /* Zero the memory. */ while (iPage-- > 0) { PPGMPAGE pPage = &pRam->aPages[iPage]; switch (PGM_PAGE_GET_TYPE(pPage)) { case PGMPAGETYPE_RAM: switch (PGM_PAGE_GET_STATE(pPage)) { case PGM_PAGE_STATE_ZERO: break; case PGM_PAGE_STATE_SHARED: case PGM_PAGE_STATE_WRITE_MONITORED: rc = pgmPhysPageMakeWritable(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT)); AssertLogRelRCReturn(rc, rc); case PGM_PAGE_STATE_ALLOCATED: { void *pvPage; rc = pgmPhysPageMap(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pvPage); AssertLogRelRCReturn(rc, rc); ASMMemZeroPage(pvPage); break; } } break; case PGMPAGETYPE_MMIO2_ALIAS_MMIO: pgmHandlerPhysicalResetAliasedPage(pVM, pPage, pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT)); break; case PGMPAGETYPE_MMIO2: case PGMPAGETYPE_ROM_SHADOW: case PGMPAGETYPE_ROM: case PGMPAGETYPE_MMIO: break; default: AssertFailed(); } } /* for each page */ } } /* * Finish off any pages pending freeing. */ if (cPendingPages) { rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages); AssertLogRelRCReturn(rc, rc); } GMMR3FreePagesCleanup(pReq); return VINF_SUCCESS; } /** * This is the interface IOM is using to register an MMIO region. * * It will check for conflicts and ensure that a RAM range structure * is present before calling the PGMR3HandlerPhysicalRegister API to * register the callbacks. * * @returns VBox status code. * * @param pVM Pointer to the shared VM structure. * @param GCPhys The start of the MMIO region. * @param cb The size of the MMIO region. * @param pfnHandlerR3 The address of the ring-3 handler. (IOMR3MMIOHandler) * @param pvUserR3 The user argument for R3. * @param pfnHandlerR0 The address of the ring-0 handler. (IOMMMIOHandler) * @param pvUserR0 The user argument for R0. * @param pfnHandlerRC The address of the RC handler. (IOMMMIOHandler) * @param pvUserRC The user argument for RC. * @param pszDesc The description of the MMIO region. */ VMMR3DECL(int) PGMR3PhysMMIORegister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, R3PTRTYPE(PFNPGMR3PHYSHANDLER) pfnHandlerR3, RTR3PTR pvUserR3, R0PTRTYPE(PFNPGMR0PHYSHANDLER) pfnHandlerR0, RTR0PTR pvUserR0, RCPTRTYPE(PFNPGMRCPHYSHANDLER) pfnHandlerRC, RTRCPTR pvUserRC, R3PTRTYPE(const char *) pszDesc) { /* * Assert on some assumption. */ VM_ASSERT_EMT(pVM); AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); AssertPtrReturn(pszDesc, VERR_INVALID_POINTER); AssertReturn(*pszDesc, VERR_INVALID_PARAMETER); /* * Make sure there's a RAM range structure for the region. */ int rc; RTGCPHYS GCPhysLast = GCPhys + (cb - 1); bool fRamExists = false; PPGMRAMRANGE pRamPrev = NULL; PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam && GCPhysLast >= pRam->GCPhys) { if ( GCPhysLast >= pRam->GCPhys && GCPhys <= pRam->GCPhysLast) { /* Simplification: all within the same range. */ AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys && GCPhysLast <= pRam->GCPhysLast, ("%RGp-%RGp (MMIO/%s) falls partly outside %RGp-%RGp (%s)\n", GCPhys, GCPhysLast, pszDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc), VERR_PGM_RAM_CONFLICT); /* Check that it's all RAM or MMIO pages. */ PCPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cLeft = cb >> PAGE_SHIFT; while (cLeft-- > 0) { AssertLogRelMsgReturn( PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM || PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO, ("%RGp-%RGp (MMIO/%s): %RGp is not a RAM or MMIO page - type=%d desc=%s\n", GCPhys, GCPhysLast, pszDesc, PGM_PAGE_GET_TYPE(pPage), pRam->pszDesc), VERR_PGM_RAM_CONFLICT); pPage++; } /* Looks good. */ fRamExists = true; break; } /* next */ pRamPrev = pRam; pRam = pRam->pNextR3; } PPGMRAMRANGE pNew; if (fRamExists) { pNew = NULL; /* * Make all the pages in the range MMIO/ZERO pages, freeing any * RAM pages currently mapped here. This might not be 100% correct * for PCI memory, but we're doing the same thing for MMIO2 pages. */ rc = pgmLock(pVM); if (RT_SUCCESS(rc)) { rc = pgmR3PhysFreePageRange(pVM, pRam, GCPhys, GCPhysLast, PGMPAGETYPE_MMIO); pgmUnlock(pVM); } AssertRCReturn(rc, rc); } else { pgmLock(pVM); /* * No RAM range, insert an ad hoc one. * * Note that we don't have to tell REM about this range because * PGMHandlerPhysicalRegisterEx will do that for us. */ Log(("PGMR3PhysMMIORegister: Adding ad hoc MMIO range for %RGp-%RGp %s\n", GCPhys, GCPhysLast, pszDesc)); const uint32_t cPages = cb >> PAGE_SHIFT; const size_t cbRamRange = RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]); rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]), 16, MM_TAG_PGM_PHYS, (void **)&pNew); AssertLogRelMsgRCReturn(rc, ("cbRamRange=%zu\n", cbRamRange), rc); /* Initialize the range. */ pNew->pSelfR0 = MMHyperCCToR0(pVM, pNew); pNew->pSelfRC = MMHyperCCToRC(pVM, pNew); pNew->GCPhys = GCPhys; pNew->GCPhysLast = GCPhysLast; pNew->cb = cb; pNew->pszDesc = pszDesc; pNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO; pNew->pvR3 = NULL; pNew->paLSPages = NULL; uint32_t iPage = cPages; while (iPage-- > 0) PGM_PAGE_INIT_ZERO(&pNew->aPages[iPage], pVM, PGMPAGETYPE_MMIO); Assert(PGM_PAGE_GET_TYPE(&pNew->aPages[0]) == PGMPAGETYPE_MMIO); /* update the page count stats. */ pVM->pgm.s.cZeroPages += cPages; pVM->pgm.s.cAllPages += cPages; /* link it */ pgmR3PhysLinkRamRange(pVM, pNew, pRamPrev); pgmUnlock(pVM); } /* * Register the access handler. */ rc = PGMHandlerPhysicalRegisterEx(pVM, PGMPHYSHANDLERTYPE_MMIO, GCPhys, GCPhysLast, pfnHandlerR3, pvUserR3, pfnHandlerR0, pvUserR0, pfnHandlerRC, pvUserRC, pszDesc); if ( RT_FAILURE(rc) && !fRamExists) { pVM->pgm.s.cZeroPages -= cb >> PAGE_SHIFT; pVM->pgm.s.cAllPages -= cb >> PAGE_SHIFT; /* remove the ad hoc range. */ pgmR3PhysUnlinkRamRange2(pVM, pNew, pRamPrev); pNew->cb = pNew->GCPhys = pNew->GCPhysLast = NIL_RTGCPHYS; MMHyperFree(pVM, pRam); } return rc; } /** * This is the interface IOM is using to register an MMIO region. * * It will take care of calling PGMHandlerPhysicalDeregister and clean up * any ad hoc PGMRAMRANGE left behind. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param GCPhys The start of the MMIO region. * @param cb The size of the MMIO region. */ VMMR3DECL(int) PGMR3PhysMMIODeregister(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb) { VM_ASSERT_EMT(pVM); /* * First deregister the handler, then check if we should remove the ram range. */ int rc = PGMHandlerPhysicalDeregister(pVM, GCPhys); if (RT_SUCCESS(rc)) { RTGCPHYS GCPhysLast = GCPhys + (cb - 1); PPGMRAMRANGE pRamPrev = NULL; PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam && GCPhysLast >= pRam->GCPhys) { /** @todo We're being a bit too careful here. rewrite. */ if ( GCPhysLast == pRam->GCPhysLast && GCPhys == pRam->GCPhys) { Assert(pRam->cb == cb); /* * See if all the pages are dead MMIO pages. */ uint32_t const cPages = cb >> PAGE_SHIFT; bool fAllMMIO = true; uint32_t iPage = 0; uint32_t cLeft = cPages; while (cLeft-- > 0) { PPGMPAGE pPage = &pRam->aPages[iPage]; if ( PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO /*|| not-out-of-action later */) { fAllMMIO = false; Assert(PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_MMIO2_ALIAS_MMIO); AssertMsgFailed(("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage)); break; } Assert(PGM_PAGE_IS_ZERO(pPage)); pPage++; } if (fAllMMIO) { /* * Ad-hoc range, unlink and free it. */ Log(("PGMR3PhysMMIODeregister: Freeing ad hoc MMIO range for %RGp-%RGp %s\n", GCPhys, GCPhysLast, pRam->pszDesc)); pVM->pgm.s.cAllPages -= cPages; pVM->pgm.s.cZeroPages -= cPages; pgmR3PhysUnlinkRamRange2(pVM, pRam, pRamPrev); pRam->cb = pRam->GCPhys = pRam->GCPhysLast = NIL_RTGCPHYS; MMHyperFree(pVM, pRam); break; } } /* * Range match? It will all be within one range (see PGMAllHandler.cpp). */ if ( GCPhysLast >= pRam->GCPhys && GCPhys <= pRam->GCPhysLast) { Assert(GCPhys >= pRam->GCPhys); Assert(GCPhysLast <= pRam->GCPhysLast); /* * Turn the pages back into RAM pages. */ uint32_t iPage = (GCPhys - pRam->GCPhys) >> PAGE_SHIFT; uint32_t cLeft = cb >> PAGE_SHIFT; while (cLeft--) { PPGMPAGE pPage = &pRam->aPages[iPage]; AssertMsg(PGM_PAGE_IS_MMIO(pPage), ("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage)); AssertMsg(PGM_PAGE_IS_ZERO(pPage), ("%RGp %R[pgmpage]\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), pPage)); if (PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_MMIO) PGM_PAGE_SET_TYPE(pPage, PGMPAGETYPE_RAM); } break; } /* next */ pRamPrev = pRam; pRam = pRam->pNextR3; } } return rc; } /** * Locate a MMIO2 range. * * @returns Pointer to the MMIO2 range. * @param pVM Pointer to the shared VM structure. * @param pDevIns The device instance owning the region. * @param iRegion The region. */ DECLINLINE(PPGMMMIO2RANGE) pgmR3PhysMMIO2Find(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion) { /* * Search the list. */ for (PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3; pCur; pCur = pCur->pNextR3) if ( pCur->pDevInsR3 == pDevIns && pCur->iRegion == iRegion) return pCur; return NULL; } /** * Allocate and register an MMIO2 region. * * As mentioned elsewhere, MMIO2 is just RAM spelled differently. It's * RAM associated with a device. It is also non-shared memory with a * permanent ring-3 mapping and page backing (presently). * * A MMIO2 range may overlap with base memory if a lot of RAM * is configured for the VM, in which case we'll drop the base * memory pages. Presently we will make no attempt to preserve * anything that happens to be present in the base memory that * is replaced, this is of course incorrectly but it's too much * effort. * * @returns VBox status code. * @retval VINF_SUCCESS on success, *ppv pointing to the R3 mapping of the memory. * @retval VERR_ALREADY_EXISTS if the region already exists. * * @param pVM Pointer to the shared VM structure. * @param pDevIns The device instance owning the region. * @param iRegion The region number. If the MMIO2 memory is a PCI I/O region * this number has to be the number of that region. Otherwise * it can be any number safe UINT8_MAX. * @param cb The size of the region. Must be page aligned. * @param fFlags Reserved for future use, must be zero. * @param ppv Where to store the pointer to the ring-3 mapping of the memory. * @param pszDesc The description. */ VMMR3DECL(int) PGMR3PhysMMIO2Register(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS cb, uint32_t fFlags, void **ppv, const char *pszDesc) { /* * Validate input. */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER); AssertPtrReturn(ppv, VERR_INVALID_POINTER); AssertPtrReturn(pszDesc, VERR_INVALID_POINTER); AssertReturn(*pszDesc, VERR_INVALID_PARAMETER); AssertReturn(pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion) == NULL, VERR_ALREADY_EXISTS); AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); AssertReturn(cb, VERR_INVALID_PARAMETER); AssertReturn(!fFlags, VERR_INVALID_PARAMETER); const uint32_t cPages = cb >> PAGE_SHIFT; AssertLogRelReturn(((RTGCPHYS)cPages << PAGE_SHIFT) == cb, VERR_INVALID_PARAMETER); AssertLogRelReturn(cPages <= INT32_MAX / 2, VERR_NO_MEMORY); /* * For the 2nd+ instance, mangle the description string so it's unique. */ if (pDevIns->iInstance > 0) /** @todo Move to PDMDevHlp.cpp and use a real string cache. */ { pszDesc = MMR3HeapAPrintf(pVM, MM_TAG_PGM_PHYS, "%s [%u]", pszDesc, pDevIns->iInstance); if (!pszDesc) return VERR_NO_MEMORY; } /* * Try reserve and allocate the backing memory first as this is what is * most likely to fail. */ int rc = MMR3AdjustFixedReservation(pVM, cPages, pszDesc); if (RT_SUCCESS(rc)) { void *pvPages; PSUPPAGE paPages = (PSUPPAGE)RTMemTmpAlloc(cPages * sizeof(SUPPAGE)); if (RT_SUCCESS(rc)) rc = SUPR3PageAllocEx(cPages, 0 /*fFlags*/, &pvPages, NULL /*pR0Ptr*/, paPages); if (RT_SUCCESS(rc)) { memset(pvPages, 0, cPages * PAGE_SIZE); /* * Create the MMIO2 range record for it. */ const size_t cbRange = RT_OFFSETOF(PGMMMIO2RANGE, RamRange.aPages[cPages]); PPGMMMIO2RANGE pNew; rc = MMR3HyperAllocOnceNoRel(pVM, cbRange, 0, MM_TAG_PGM_PHYS, (void **)&pNew); AssertLogRelMsgRC(rc, ("cbRamRange=%zu\n", cbRange)); if (RT_SUCCESS(rc)) { pNew->pDevInsR3 = pDevIns; pNew->pvR3 = pvPages; //pNew->pNext = NULL; //pNew->fMapped = false; //pNew->fOverlapping = false; pNew->iRegion = iRegion; pNew->idSavedState = UINT8_MAX; pNew->RamRange.pSelfR0 = MMHyperCCToR0(pVM, &pNew->RamRange); pNew->RamRange.pSelfRC = MMHyperCCToRC(pVM, &pNew->RamRange); pNew->RamRange.GCPhys = NIL_RTGCPHYS; pNew->RamRange.GCPhysLast = NIL_RTGCPHYS; pNew->RamRange.pszDesc = pszDesc; pNew->RamRange.cb = cb; pNew->RamRange.fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_MMIO2; pNew->RamRange.pvR3 = pvPages; //pNew->RamRange.paLSPages = NULL; uint32_t iPage = cPages; while (iPage-- > 0) { PGM_PAGE_INIT(&pNew->RamRange.aPages[iPage], paPages[iPage].Phys, NIL_GMM_PAGEID, PGMPAGETYPE_MMIO2, PGM_PAGE_STATE_ALLOCATED); } /* update page count stats */ pVM->pgm.s.cAllPages += cPages; pVM->pgm.s.cPrivatePages += cPages; /* * Link it into the list. * Since there is no particular order, just push it. */ pgmLock(pVM); pNew->pNextR3 = pVM->pgm.s.pMmio2RangesR3; pVM->pgm.s.pMmio2RangesR3 = pNew; pgmUnlock(pVM); *ppv = pvPages; RTMemTmpFree(paPages); return VINF_SUCCESS; } SUPR3PageFreeEx(pvPages, cPages); } RTMemTmpFree(paPages); MMR3AdjustFixedReservation(pVM, -(int32_t)cPages, pszDesc); } if (pDevIns->iInstance > 0) MMR3HeapFree((void *)pszDesc); return rc; } /** * Deregisters and frees an MMIO2 region. * * Any physical (and virtual) access handlers registered for the region must * be deregistered before calling this function. * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param pDevIns The device instance owning the region. * @param iRegion The region. If it's UINT32_MAX it'll be a wildcard match. */ VMMR3DECL(int) PGMR3PhysMMIO2Deregister(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion) { /* * Validate input. */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX || iRegion == UINT32_MAX, VERR_INVALID_PARAMETER); pgmLock(pVM); int rc = VINF_SUCCESS; unsigned cFound = 0; PPGMMMIO2RANGE pPrev = NULL; PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3; while (pCur) { if ( pCur->pDevInsR3 == pDevIns && ( iRegion == UINT32_MAX || pCur->iRegion == iRegion)) { cFound++; /* * Unmap it if it's mapped. */ if (pCur->fMapped) { int rc2 = PGMR3PhysMMIO2Unmap(pVM, pCur->pDevInsR3, pCur->iRegion, pCur->RamRange.GCPhys); AssertRC(rc2); if (RT_FAILURE(rc2) && RT_SUCCESS(rc)) rc = rc2; } /* * Unlink it */ PPGMMMIO2RANGE pNext = pCur->pNextR3; if (pPrev) pPrev->pNextR3 = pNext; else pVM->pgm.s.pMmio2RangesR3 = pNext; pCur->pNextR3 = NULL; /* * Free the memory. */ int rc2 = SUPR3PageFreeEx(pCur->pvR3, pCur->RamRange.cb >> PAGE_SHIFT); AssertRC(rc2); if (RT_FAILURE(rc2) && RT_SUCCESS(rc)) rc = rc2; uint32_t const cPages = pCur->RamRange.cb >> PAGE_SHIFT; rc2 = MMR3AdjustFixedReservation(pVM, -(int32_t)cPages, pCur->RamRange.pszDesc); AssertRC(rc2); if (RT_FAILURE(rc2) && RT_SUCCESS(rc)) rc = rc2; /* we're leaking hyper memory here if done at runtime. */ #ifdef VBOX_STRICT VMSTATE const enmState = VMR3GetState(pVM); AssertMsg( enmState == VMSTATE_POWERING_OFF || enmState == VMSTATE_POWERING_OFF_LS || enmState == VMSTATE_OFF || enmState == VMSTATE_OFF_LS || enmState == VMSTATE_DESTROYING || enmState == VMSTATE_TERMINATED || enmState == VMSTATE_CREATING , ("%s\n", VMR3GetStateName(enmState))); #endif /*rc = MMHyperFree(pVM, pCur); AssertRCReturn(rc, rc); - not safe, see the alloc call. */ /* update page count stats */ pVM->pgm.s.cAllPages -= cPages; pVM->pgm.s.cPrivatePages -= cPages; /* next */ pCur = pNext; } else { pPrev = pCur; pCur = pCur->pNextR3; } } pgmUnlock(pVM); return !cFound && iRegion != UINT32_MAX ? VERR_NOT_FOUND : rc; } /** * Maps a MMIO2 region. * * This is done when a guest / the bios / state loading changes the * PCI config. The replacing of base memory has the same restrictions * as during registration, of course. * * @returns VBox status code. * * @param pVM Pointer to the shared VM structure. * @param pDevIns The */ VMMR3DECL(int) PGMR3PhysMMIO2Map(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS GCPhys) { /* * Validate input */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER); AssertReturn(GCPhys != NIL_RTGCPHYS, VERR_INVALID_PARAMETER); AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER); AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion); AssertReturn(pCur, VERR_NOT_FOUND); AssertReturn(!pCur->fMapped, VERR_WRONG_ORDER); Assert(pCur->RamRange.GCPhys == NIL_RTGCPHYS); Assert(pCur->RamRange.GCPhysLast == NIL_RTGCPHYS); const RTGCPHYS GCPhysLast = GCPhys + pCur->RamRange.cb - 1; AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER); /* * Find our location in the ram range list, checking for * restriction we don't bother implementing yet (partially overlapping). */ bool fRamExists = false; PPGMRAMRANGE pRamPrev = NULL; PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam && GCPhysLast >= pRam->GCPhys) { if ( GCPhys <= pRam->GCPhysLast && GCPhysLast >= pRam->GCPhys) { /* completely within? */ AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys && GCPhysLast <= pRam->GCPhysLast, ("%RGp-%RGp (MMIO2/%s) falls partly outside %RGp-%RGp (%s)\n", GCPhys, GCPhysLast, pCur->RamRange.pszDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc), VERR_PGM_RAM_CONFLICT); fRamExists = true; break; } /* next */ pRamPrev = pRam; pRam = pRam->pNextR3; } if (fRamExists) { PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT; while (cPagesLeft-- > 0) { AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM, ("%RGp isn't a RAM page (%d) - mapping %RGp-%RGp (MMIO2/%s).\n", GCPhys, PGM_PAGE_GET_TYPE(pPage), GCPhys, GCPhysLast, pCur->RamRange.pszDesc), VERR_PGM_RAM_CONFLICT); pPage++; } } Log(("PGMR3PhysMMIO2Map: %RGp-%RGp fRamExists=%RTbool %s\n", GCPhys, GCPhysLast, fRamExists, pCur->RamRange.pszDesc)); /* * Make the changes. */ pgmLock(pVM); pCur->RamRange.GCPhys = GCPhys; pCur->RamRange.GCPhysLast = GCPhysLast; pCur->fMapped = true; pCur->fOverlapping = fRamExists; if (fRamExists) { /** @todo use pgmR3PhysFreePageRange here. */ uint32_t cPendingPages = 0; PGMMFREEPAGESREQ pReq; int rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE); AssertLogRelRCReturn(rc, rc); /* replace the pages, freeing all present RAM pages. */ PPGMPAGE pPageSrc = &pCur->RamRange.aPages[0]; PPGMPAGE pPageDst = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT; while (cPagesLeft-- > 0) { rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, pPageDst, GCPhys); AssertLogRelRCReturn(rc, rc); /* We're done for if this goes wrong. */ RTHCPHYS const HCPhys = PGM_PAGE_GET_HCPHYS(pPageSrc); PGM_PAGE_SET_HCPHYS(pPageDst, HCPhys); PGM_PAGE_SET_TYPE(pPageDst, PGMPAGETYPE_MMIO2); PGM_PAGE_SET_STATE(pPageDst, PGM_PAGE_STATE_ALLOCATED); pVM->pgm.s.cZeroPages--; GCPhys += PAGE_SIZE; pPageSrc++; pPageDst++; } if (cPendingPages) { rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages); AssertLogRelRCReturn(rc, rc); } GMMR3FreePagesCleanup(pReq); pgmUnlock(pVM); } else { RTGCPHYS cb = pCur->RamRange.cb; /* link in the ram range */ pgmR3PhysLinkRamRange(pVM, &pCur->RamRange, pRamPrev); pgmUnlock(pVM); REMR3NotifyPhysRamRegister(pVM, GCPhys, cb, REM_NOTIFY_PHYS_RAM_FLAGS_MMIO2); } return VINF_SUCCESS; } /** * Unmaps a MMIO2 region. * * This is done when a guest / the bios / state loading changes the * PCI config. The replacing of base memory has the same restrictions * as during registration, of course. */ VMMR3DECL(int) PGMR3PhysMMIO2Unmap(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS GCPhys) { /* * Validate input */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER); AssertReturn(GCPhys != NIL_RTGCPHYS, VERR_INVALID_PARAMETER); AssertReturn(GCPhys != 0, VERR_INVALID_PARAMETER); AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion); AssertReturn(pCur, VERR_NOT_FOUND); AssertReturn(pCur->fMapped, VERR_WRONG_ORDER); AssertReturn(pCur->RamRange.GCPhys == GCPhys, VERR_INVALID_PARAMETER); Assert(pCur->RamRange.GCPhysLast != NIL_RTGCPHYS); Log(("PGMR3PhysMMIO2Unmap: %RGp-%RGp %s\n", pCur->RamRange.GCPhys, pCur->RamRange.GCPhysLast, pCur->RamRange.pszDesc)); /* * Unmap it. */ pgmLock(pVM); RTGCPHYS GCPhysRangeREM; RTGCPHYS cbRangeREM; bool fInformREM; if (pCur->fOverlapping) { /* Restore the RAM pages we've replaced. */ PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam->GCPhys > pCur->RamRange.GCPhysLast) pRam = pRam->pNextR3; RTHCPHYS const HCPhysZeroPg = pVM->pgm.s.HCPhysZeroPg; Assert(HCPhysZeroPg != 0 && HCPhysZeroPg != NIL_RTHCPHYS); PPGMPAGE pPageDst = &pRam->aPages[(pCur->RamRange.GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cPagesLeft = pCur->RamRange.cb >> PAGE_SHIFT; while (cPagesLeft-- > 0) { PGM_PAGE_SET_HCPHYS(pPageDst, HCPhysZeroPg); PGM_PAGE_SET_TYPE(pPageDst, PGMPAGETYPE_RAM); PGM_PAGE_SET_STATE(pPageDst, PGM_PAGE_STATE_ZERO); PGM_PAGE_SET_PAGEID(pPageDst, NIL_GMM_PAGEID); pVM->pgm.s.cZeroPages++; pPageDst++; } GCPhysRangeREM = NIL_RTGCPHYS; /* shuts up gcc */ cbRangeREM = RTGCPHYS_MAX; /* ditto */ fInformREM = false; } else { GCPhysRangeREM = pCur->RamRange.GCPhys; cbRangeREM = pCur->RamRange.cb; fInformREM = true; pgmR3PhysUnlinkRamRange(pVM, &pCur->RamRange); } pCur->RamRange.GCPhys = NIL_RTGCPHYS; pCur->RamRange.GCPhysLast = NIL_RTGCPHYS; pCur->fOverlapping = false; pCur->fMapped = false; pgmUnlock(pVM); if (fInformREM) REMR3NotifyPhysRamDeregister(pVM, GCPhysRangeREM, cbRangeREM); return VINF_SUCCESS; } /** * Checks if the given address is an MMIO2 base address or not. * * @returns true/false accordingly. * @param pVM Pointer to the shared VM structure. * @param pDevIns The owner of the memory, optional. * @param GCPhys The address to check. */ VMMR3DECL(bool) PGMR3PhysMMIO2IsBase(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys) { /* * Validate input */ VM_ASSERT_EMT_RETURN(pVM, false); AssertPtrReturn(pDevIns, false); AssertReturn(GCPhys != NIL_RTGCPHYS, false); AssertReturn(GCPhys != 0, false); AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), false); /* * Search the list. */ pgmLock(pVM); for (PPGMMMIO2RANGE pCur = pVM->pgm.s.pMmio2RangesR3; pCur; pCur = pCur->pNextR3) if (pCur->RamRange.GCPhys == GCPhys) { Assert(pCur->fMapped); pgmUnlock(pVM); return true; } pgmUnlock(pVM); return false; } /** * Gets the HC physical address of a page in the MMIO2 region. * * This is API is intended for MMHyper and shouldn't be called * by anyone else... * * @returns VBox status code. * @param pVM Pointer to the shared VM structure. * @param pDevIns The owner of the memory, optional. * @param iRegion The region. * @param off The page expressed an offset into the MMIO2 region. * @param pHCPhys Where to store the result. */ VMMR3DECL(int) PGMR3PhysMMIO2GetHCPhys(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, PRTHCPHYS pHCPhys) { /* * Validate input */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER); pgmLock(pVM); PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion); AssertReturn(pCur, VERR_NOT_FOUND); AssertReturn(off < pCur->RamRange.cb, VERR_INVALID_PARAMETER); PCPGMPAGE pPage = &pCur->RamRange.aPages[off >> PAGE_SHIFT]; *pHCPhys = PGM_PAGE_GET_HCPHYS(pPage); pgmUnlock(pVM); return VINF_SUCCESS; } /** * Maps a portion of an MMIO2 region into kernel space (host). * * The kernel mapping will become invalid when the MMIO2 memory is deregistered * or the VM is terminated. * * @return VBox status code. * * @param pVM Pointer to the shared VM structure. * @param pDevIns The device owning the MMIO2 memory. * @param iRegion The region. * @param off The offset into the region. Must be page aligned. * @param cb The number of bytes to map. Must be page aligned. * @param pszDesc Mapping description. * @param pR0Ptr Where to store the R0 address. */ VMMR3DECL(int) PGMR3PhysMMIO2MapKernel(PVM pVM, PPDMDEVINS pDevIns, uint32_t iRegion, RTGCPHYS off, RTGCPHYS cb, const char *pszDesc, PRTR0PTR pR0Ptr) { /* * Validate input. */ VM_ASSERT_EMT_RETURN(pVM, VERR_VM_THREAD_NOT_EMT); AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(iRegion <= UINT8_MAX, VERR_INVALID_PARAMETER); PPGMMMIO2RANGE pCur = pgmR3PhysMMIO2Find(pVM, pDevIns, iRegion); AssertReturn(pCur, VERR_NOT_FOUND); AssertReturn(off < pCur->RamRange.cb, VERR_INVALID_PARAMETER); AssertReturn(cb <= pCur->RamRange.cb, VERR_INVALID_PARAMETER); AssertReturn(off + cb <= pCur->RamRange.cb, VERR_INVALID_PARAMETER); /* * Pass the request on to the support library/driver. */ int rc = SUPR3PageMapKernel(pCur->pvR3, off, cb, 0, pR0Ptr); return rc; } /** * Registers a ROM image. * * Shadowed ROM images requires double the amount of backing memory, so, * don't use that unless you have to. Shadowing of ROM images is process * where we can select where the reads go and where the writes go. On real * hardware the chipset provides means to configure this. We provide * PGMR3PhysProtectROM() for this purpose. * * A read-only copy of the ROM image will always be kept around while we * will allocate RAM pages for the changes on demand (unless all memory * is configured to be preallocated). * * @returns VBox status. * @param pVM VM Handle. * @param pDevIns The device instance owning the ROM. * @param GCPhys First physical address in the range. * Must be page aligned! * @param cbRange The size of the range (in bytes). * Must be page aligned! * @param pvBinary Pointer to the binary data backing the ROM image. * This must be exactly \a cbRange in size. * @param fFlags Mask of flags. PGMPHYS_ROM_FLAGS_SHADOWED * and/or PGMPHYS_ROM_FLAGS_PERMANENT_BINARY. * @param pszDesc Pointer to description string. This must not be freed. * * @remark There is no way to remove the rom, automatically on device cleanup or * manually from the device yet. This isn't difficult in any way, it's * just not something we expect to be necessary for a while. */ VMMR3DECL(int) PGMR3PhysRomRegister(PVM pVM, PPDMDEVINS pDevIns, RTGCPHYS GCPhys, RTGCPHYS cb, const void *pvBinary, uint32_t fFlags, const char *pszDesc) { Log(("PGMR3PhysRomRegister: pDevIns=%p GCPhys=%RGp(-%RGp) cb=%RGp pvBinary=%p fFlags=%#x pszDesc=%s\n", pDevIns, GCPhys, GCPhys + cb, cb, pvBinary, fFlags, pszDesc)); /* * Validate input. */ AssertPtrReturn(pDevIns, VERR_INVALID_PARAMETER); AssertReturn(RT_ALIGN_T(GCPhys, PAGE_SIZE, RTGCPHYS) == GCPhys, VERR_INVALID_PARAMETER); AssertReturn(RT_ALIGN_T(cb, PAGE_SIZE, RTGCPHYS) == cb, VERR_INVALID_PARAMETER); RTGCPHYS GCPhysLast = GCPhys + (cb - 1); AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER); AssertPtrReturn(pvBinary, VERR_INVALID_PARAMETER); AssertPtrReturn(pszDesc, VERR_INVALID_POINTER); AssertReturn(!(fFlags & ~(PGMPHYS_ROM_FLAGS_SHADOWED | PGMPHYS_ROM_FLAGS_PERMANENT_BINARY)), VERR_INVALID_PARAMETER); VM_ASSERT_STATE_RETURN(pVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); const uint32_t cPages = cb >> PAGE_SHIFT; /* * Find the ROM location in the ROM list first. */ PPGMROMRANGE pRomPrev = NULL; PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; while (pRom && GCPhysLast >= pRom->GCPhys) { if ( GCPhys <= pRom->GCPhysLast && GCPhysLast >= pRom->GCPhys) AssertLogRelMsgFailedReturn(("%RGp-%RGp (%s) conflicts with existing %RGp-%RGp (%s)\n", GCPhys, GCPhysLast, pszDesc, pRom->GCPhys, pRom->GCPhysLast, pRom->pszDesc), VERR_PGM_RAM_CONFLICT); /* next */ pRomPrev = pRom; pRom = pRom->pNextR3; } /* * Find the RAM location and check for conflicts. * * Conflict detection is a bit different than for RAM * registration since a ROM can be located within a RAM * range. So, what we have to check for is other memory * types (other than RAM that is) and that we don't span * more than one RAM range (layz). */ bool fRamExists = false; PPGMRAMRANGE pRamPrev = NULL; PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; while (pRam && GCPhysLast >= pRam->GCPhys) { if ( GCPhys <= pRam->GCPhysLast && GCPhysLast >= pRam->GCPhys) { /* completely within? */ AssertLogRelMsgReturn( GCPhys >= pRam->GCPhys && GCPhysLast <= pRam->GCPhysLast, ("%RGp-%RGp (%s) falls partly outside %RGp-%RGp (%s)\n", GCPhys, GCPhysLast, pszDesc, pRam->GCPhys, pRam->GCPhysLast, pRam->pszDesc), VERR_PGM_RAM_CONFLICT); fRamExists = true; break; } /* next */ pRamPrev = pRam; pRam = pRam->pNextR3; } if (fRamExists) { PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; uint32_t cPagesLeft = cPages; while (cPagesLeft-- > 0) { AssertLogRelMsgReturn(PGM_PAGE_GET_TYPE(pPage) == PGMPAGETYPE_RAM, ("%RGp (%R[pgmpage]) isn't a RAM page - registering %RGp-%RGp (%s).\n", pRam->GCPhys + ((RTGCPHYS)(uintptr_t)(pPage - &pRam->aPages[0]) << PAGE_SHIFT), pPage, GCPhys, GCPhysLast, pszDesc), VERR_PGM_RAM_CONFLICT); Assert(PGM_PAGE_IS_ZERO(pPage)); pPage++; } } /* * Update the base memory reservation if necessary. */ uint32_t cExtraBaseCost = fRamExists ? cPages : 0; if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) cExtraBaseCost += cPages; if (cExtraBaseCost) { int rc = MMR3IncreaseBaseReservation(pVM, cExtraBaseCost); if (RT_FAILURE(rc)) return rc; } /* * Allocate memory for the virgin copy of the RAM. */ PGMMALLOCATEPAGESREQ pReq; int rc = GMMR3AllocatePagesPrepare(pVM, &pReq, cPages, GMMACCOUNT_BASE); AssertRCReturn(rc, rc); for (uint32_t iPage = 0; iPage < cPages; iPage++) { pReq->aPages[iPage].HCPhysGCPhys = GCPhys + (iPage << PAGE_SHIFT); pReq->aPages[iPage].idPage = NIL_GMM_PAGEID; pReq->aPages[iPage].idSharedPage = NIL_GMM_PAGEID; } pgmLock(pVM); rc = GMMR3AllocatePagesPerform(pVM, pReq); pgmUnlock(pVM); if (RT_FAILURE(rc)) { GMMR3AllocatePagesCleanup(pReq); return rc; } /* * Allocate the new ROM range and RAM range (if necessary). */ PPGMROMRANGE pRomNew; rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMROMRANGE, aPages[cPages]), 0, MM_TAG_PGM_PHYS, (void **)&pRomNew); if (RT_SUCCESS(rc)) { PPGMRAMRANGE pRamNew = NULL; if (!fRamExists) rc = MMHyperAlloc(pVM, RT_OFFSETOF(PGMRAMRANGE, aPages[cPages]), sizeof(PGMPAGE), MM_TAG_PGM_PHYS, (void **)&pRamNew); if (RT_SUCCESS(rc)) { pgmLock(pVM); /* * Initialize and insert the RAM range (if required). */ PPGMROMPAGE pRomPage = &pRomNew->aPages[0]; if (!fRamExists) { pRamNew->pSelfR0 = MMHyperCCToR0(pVM, pRamNew); pRamNew->pSelfRC = MMHyperCCToRC(pVM, pRamNew); pRamNew->GCPhys = GCPhys; pRamNew->GCPhysLast = GCPhysLast; pRamNew->cb = cb; pRamNew->pszDesc = pszDesc; pRamNew->fFlags = PGM_RAM_RANGE_FLAGS_AD_HOC_ROM; pRamNew->pvR3 = NULL; pRamNew->paLSPages = NULL; PPGMPAGE pPage = &pRamNew->aPages[0]; for (uint32_t iPage = 0; iPage < cPages; iPage++, pPage++, pRomPage++) { PGM_PAGE_INIT(pPage, pReq->aPages[iPage].HCPhysGCPhys, pReq->aPages[iPage].idPage, PGMPAGETYPE_ROM, PGM_PAGE_STATE_ALLOCATED); pRomPage->Virgin = *pPage; } pVM->pgm.s.cAllPages += cPages; pgmR3PhysLinkRamRange(pVM, pRamNew, pRamPrev); } else { PPGMPAGE pPage = &pRam->aPages[(GCPhys - pRam->GCPhys) >> PAGE_SHIFT]; for (uint32_t iPage = 0; iPage < cPages; iPage++, pPage++, pRomPage++) { PGM_PAGE_SET_TYPE(pPage, PGMPAGETYPE_ROM); PGM_PAGE_SET_HCPHYS(pPage, pReq->aPages[iPage].HCPhysGCPhys); PGM_PAGE_SET_STATE(pPage, PGM_PAGE_STATE_ALLOCATED); PGM_PAGE_SET_PAGEID(pPage, pReq->aPages[iPage].idPage); pRomPage->Virgin = *pPage; } pRamNew = pRam; pVM->pgm.s.cZeroPages -= cPages; } pVM->pgm.s.cPrivatePages += cPages; pgmUnlock(pVM); /* * !HACK ALERT! REM + (Shadowed) ROM ==> mess. * * If it's shadowed we'll register the handler after the ROM notification * so we get the access handler callbacks that we should. If it isn't * shadowed we'll do it the other way around to make REM use the built-in * ROM behavior and not the handler behavior (which is to route all access * to PGM atm). */ if (fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) { REMR3NotifyPhysRomRegister(pVM, GCPhys, cb, NULL, true /* fShadowed */); rc = PGMR3HandlerPhysicalRegister(pVM, fFlags & PGMPHYS_ROM_FLAGS_SHADOWED ? PGMPHYSHANDLERTYPE_PHYSICAL_ALL : PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhys, GCPhysLast, pgmR3PhysRomWriteHandler, pRomNew, NULL, "pgmPhysRomWriteHandler", MMHyperCCToR0(pVM, pRomNew), NULL, "pgmPhysRomWriteHandler", MMHyperCCToRC(pVM, pRomNew), pszDesc); } else { rc = PGMR3HandlerPhysicalRegister(pVM, fFlags & PGMPHYS_ROM_FLAGS_SHADOWED ? PGMPHYSHANDLERTYPE_PHYSICAL_ALL : PGMPHYSHANDLERTYPE_PHYSICAL_WRITE, GCPhys, GCPhysLast, pgmR3PhysRomWriteHandler, pRomNew, NULL, "pgmPhysRomWriteHandler", MMHyperCCToR0(pVM, pRomNew), NULL, "pgmPhysRomWriteHandler", MMHyperCCToRC(pVM, pRomNew), pszDesc); REMR3NotifyPhysRomRegister(pVM, GCPhys, cb, NULL, false /* fShadowed */); } if (RT_SUCCESS(rc)) { pgmLock(pVM); /* * Copy the image over to the virgin pages. * This must be done after linking in the RAM range. */ PPGMPAGE pRamPage = &pRamNew->aPages[(GCPhys - pRamNew->GCPhys) >> PAGE_SHIFT]; for (uint32_t iPage = 0; iPage < cPages; iPage++, pRamPage++) { void *pvDstPage; rc = pgmPhysPageMap(pVM, pRamPage, GCPhys + (iPage << PAGE_SHIFT), &pvDstPage); if (RT_FAILURE(rc)) { VMSetError(pVM, rc, RT_SRC_POS, "Failed to map virgin ROM page at %RGp", GCPhys); break; } memcpy(pvDstPage, (const uint8_t *)pvBinary + (iPage << PAGE_SHIFT), PAGE_SIZE); } if (RT_SUCCESS(rc)) { /* * Initialize the ROM range. * Note that the Virgin member of the pages has already been initialized above. */ pRomNew->GCPhys = GCPhys; pRomNew->GCPhysLast = GCPhysLast; pRomNew->cb = cb; pRomNew->fFlags = fFlags; pRomNew->idSavedState = UINT8_MAX; pRomNew->pvOriginal = fFlags & PGMPHYS_ROM_FLAGS_PERMANENT_BINARY ? pvBinary : NULL; pRomNew->pszDesc = pszDesc; for (unsigned iPage = 0; iPage < cPages; iPage++) { PPGMROMPAGE pPage = &pRomNew->aPages[iPage]; pPage->enmProt = PGMROMPROT_READ_ROM_WRITE_IGNORE; PGM_PAGE_INIT_ZERO(&pPage->Shadow, pVM, PGMPAGETYPE_ROM_SHADOW); } /* update the page count stats */ pVM->pgm.s.cZeroPages += cPages; pVM->pgm.s.cAllPages += cPages; /* * Insert the ROM range, tell REM and return successfully. */ pRomNew->pNextR3 = pRom; pRomNew->pNextR0 = pRom ? MMHyperCCToR0(pVM, pRom) : NIL_RTR0PTR; pRomNew->pNextRC = pRom ? MMHyperCCToRC(pVM, pRom) : NIL_RTRCPTR; if (pRomPrev) { pRomPrev->pNextR3 = pRomNew; pRomPrev->pNextR0 = MMHyperCCToR0(pVM, pRomNew); pRomPrev->pNextRC = MMHyperCCToRC(pVM, pRomNew); } else { pVM->pgm.s.pRomRangesR3 = pRomNew; pVM->pgm.s.pRomRangesR0 = MMHyperCCToR0(pVM, pRomNew); pVM->pgm.s.pRomRangesRC = MMHyperCCToRC(pVM, pRomNew); } GMMR3AllocatePagesCleanup(pReq); pgmUnlock(pVM); return VINF_SUCCESS; } /* bail out */ pgmUnlock(pVM); int rc2 = PGMHandlerPhysicalDeregister(pVM, GCPhys); AssertRC(rc2); pgmLock(pVM); } if (!fRamExists) { pgmR3PhysUnlinkRamRange2(pVM, pRamNew, pRamPrev); MMHyperFree(pVM, pRamNew); } } MMHyperFree(pVM, pRomNew); } /** @todo Purge the mapping cache or something... */ GMMR3FreeAllocatedPages(pVM, pReq); GMMR3AllocatePagesCleanup(pReq); pgmUnlock(pVM); return rc; } /** * \#PF Handler callback for ROM write accesses. * * @returns VINF_SUCCESS if the handler have carried out the operation. * @returns VINF_PGM_HANDLER_DO_DEFAULT if the caller should carry out the access operation. * @param pVM VM Handle. * @param GCPhys The physical address the guest is writing to. * @param pvPhys The HC mapping of that address. * @param pvBuf What the guest is reading/writing. * @param cbBuf How much it's reading/writing. * @param enmAccessType The access type. * @param pvUser User argument. */ static DECLCALLBACK(int) pgmR3PhysRomWriteHandler(PVM pVM, RTGCPHYS GCPhys, void *pvPhys, void *pvBuf, size_t cbBuf, PGMACCESSTYPE enmAccessType, void *pvUser) { PPGMROMRANGE pRom = (PPGMROMRANGE)pvUser; const uint32_t iPage = (GCPhys - pRom->GCPhys) >> PAGE_SHIFT; Assert(iPage < (pRom->cb >> PAGE_SHIFT)); PPGMROMPAGE pRomPage = &pRom->aPages[iPage]; Log5(("pgmR3PhysRomWriteHandler: %d %c %#08RGp %#04zx\n", pRomPage->enmProt, enmAccessType == PGMACCESSTYPE_READ ? 'R' : 'W', GCPhys, cbBuf)); if (enmAccessType == PGMACCESSTYPE_READ) { switch (pRomPage->enmProt) { /* * Take the default action. */ case PGMROMPROT_READ_ROM_WRITE_IGNORE: case PGMROMPROT_READ_RAM_WRITE_IGNORE: case PGMROMPROT_READ_ROM_WRITE_RAM: case PGMROMPROT_READ_RAM_WRITE_RAM: return VINF_PGM_HANDLER_DO_DEFAULT; default: AssertMsgFailedReturn(("enmProt=%d iPage=%d GCPhys=%RGp\n", pRom->aPages[iPage].enmProt, iPage, GCPhys), VERR_INTERNAL_ERROR); } } else { Assert(enmAccessType == PGMACCESSTYPE_WRITE); switch (pRomPage->enmProt) { /* * Ignore writes. */ case PGMROMPROT_READ_ROM_WRITE_IGNORE: case PGMROMPROT_READ_RAM_WRITE_IGNORE: return VINF_SUCCESS; /* * Write to the ram page. */ case PGMROMPROT_READ_ROM_WRITE_RAM: case PGMROMPROT_READ_RAM_WRITE_RAM: /* yes this will get here too, it's *way* simpler that way. */ { /* This should be impossible now, pvPhys doesn't work cross page anylonger. */ Assert(((GCPhys - pRom->GCPhys + cbBuf - 1) >> PAGE_SHIFT) == iPage); /* * Take the lock, do lazy allocation, map the page and copy the data. * * Note that we have to bypass the mapping TLB since it works on * guest physical addresses and entering the shadow page would * kind of screw things up... */ int rc = pgmLock(pVM); AssertRC(rc); PPGMPAGE pShadowPage = &pRomPage->Shadow; if (!PGMROMPROT_IS_ROM(pRomPage->enmProt)) { pShadowPage = pgmPhysGetPage(&pVM->pgm.s, GCPhys); AssertLogRelReturn(pShadowPage, VERR_INTERNAL_ERROR); } void *pvDstPage; rc = pgmPhysPageMakeWritableAndMap(pVM, pShadowPage, GCPhys & X86_PTE_PG_MASK, &pvDstPage); if (RT_SUCCESS(rc)) { memcpy((uint8_t *)pvDstPage + (GCPhys & PAGE_OFFSET_MASK), pvBuf, cbBuf); pRomPage->LiveSave.fWrittenTo = true; } pgmUnlock(pVM); return rc; } default: AssertMsgFailedReturn(("enmProt=%d iPage=%d GCPhys=%RGp\n", pRom->aPages[iPage].enmProt, iPage, GCPhys), VERR_INTERNAL_ERROR); } } } /** * Called by PGMR3Reset to reset the shadow, switch to the virgin, * and verify that the virgin part is untouched. * * This is done after the normal memory has been cleared. * * ASSUMES that the caller owns the PGM lock. * * @param pVM The VM handle. */ int pgmR3PhysRomReset(PVM pVM) { Assert(PGMIsLockOwner(pVM)); for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { const uint32_t cPages = pRom->cb >> PAGE_SHIFT; if (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED) { /* * Reset the physical handler. */ int rc = PGMR3PhysRomProtect(pVM, pRom->GCPhys, pRom->cb, PGMROMPROT_READ_ROM_WRITE_IGNORE); AssertRCReturn(rc, rc); /* * What we do with the shadow pages depends on the memory * preallocation option. If not enabled, we'll just throw * out all the dirty pages and replace them by the zero page. */ if (!pVM->pgm.s.fRamPreAlloc) { /* Free the dirty pages. */ uint32_t cPendingPages = 0; PGMMFREEPAGESREQ pReq; rc = GMMR3FreePagesPrepare(pVM, &pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE); AssertRCReturn(rc, rc); for (uint32_t iPage = 0; iPage < cPages; iPage++) if (PGM_PAGE_GET_STATE(&pRom->aPages[iPage].Shadow) != PGM_PAGE_STATE_ZERO) { Assert(PGM_PAGE_GET_STATE(&pRom->aPages[iPage].Shadow) == PGM_PAGE_STATE_ALLOCATED); rc = pgmPhysFreePage(pVM, pReq, &cPendingPages, &pRom->aPages[iPage].Shadow, pRom->GCPhys + (iPage << PAGE_SHIFT)); AssertLogRelRCReturn(rc, rc); } if (cPendingPages) { rc = GMMR3FreePagesPerform(pVM, pReq, cPendingPages); AssertLogRelRCReturn(rc, rc); } GMMR3FreePagesCleanup(pReq); } else { /* clear all the shadow pages. */ for (uint32_t iPage = 0; iPage < cPages; iPage++) { Assert(PGM_PAGE_GET_STATE(&pRom->aPages[iPage].Shadow) != PGM_PAGE_STATE_ZERO); void *pvDstPage; const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << PAGE_SHIFT); rc = pgmPhysPageMakeWritableAndMap(pVM, &pRom->aPages[iPage].Shadow, GCPhys, &pvDstPage); if (RT_FAILURE(rc)) break; ASMMemZeroPage(pvDstPage); } AssertRCReturn(rc, rc); } } #ifdef VBOX_STRICT /* * Verify that the virgin page is unchanged if possible. */ if (pRom->pvOriginal) { uint8_t const *pbSrcPage = (uint8_t const *)pRom->pvOriginal; for (uint32_t iPage = 0; iPage < cPages; iPage++, pbSrcPage += PAGE_SIZE) { const RTGCPHYS GCPhys = pRom->GCPhys + (iPage << PAGE_SHIFT); void const *pvDstPage; int rc = pgmPhysPageMapReadOnly(pVM, &pRom->aPages[iPage].Virgin, GCPhys, &pvDstPage); if (RT_FAILURE(rc)) break; if (memcmp(pvDstPage, pbSrcPage, PAGE_SIZE)) LogRel(("pgmR3PhysRomReset: %RGp rom page changed (%s) - loaded saved state?\n", GCPhys, pRom->pszDesc)); } } #endif } return VINF_SUCCESS; } /** * Change the shadowing of a range of ROM pages. * * This is intended for implementing chipset specific memory registers * and will not be very strict about the input. It will silently ignore * any pages that are not the part of a shadowed ROM. * * @returns VBox status code. * @retval VINF_PGM_SYNC_CR3 * * @param pVM Pointer to the shared VM structure. * @param GCPhys Where to start. Page aligned. * @param cb How much to change. Page aligned. * @param enmProt The new ROM protection. */ VMMR3DECL(int) PGMR3PhysRomProtect(PVM pVM, RTGCPHYS GCPhys, RTGCPHYS cb, PGMROMPROT enmProt) { /* * Check input */ if (!cb) return VINF_SUCCESS; AssertReturn(!(GCPhys & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); AssertReturn(!(cb & PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER); RTGCPHYS GCPhysLast = GCPhys + (cb - 1); AssertReturn(GCPhysLast > GCPhys, VERR_INVALID_PARAMETER); AssertReturn(enmProt >= PGMROMPROT_INVALID && enmProt <= PGMROMPROT_END, VERR_INVALID_PARAMETER); /* * Process the request. */ pgmLock(pVM); int rc = VINF_SUCCESS; bool fFlushTLB = false; for (PPGMROMRANGE pRom = pVM->pgm.s.pRomRangesR3; pRom; pRom = pRom->pNextR3) { if ( GCPhys <= pRom->GCPhysLast && GCPhysLast >= pRom->GCPhys && (pRom->fFlags & PGMPHYS_ROM_FLAGS_SHADOWED)) { /* * Iterate the relevant pages and make necessary the changes. */ bool fChanges = false; uint32_t const cPages = pRom->GCPhysLast <= GCPhysLast ? pRom->cb >> PAGE_SHIFT : (GCPhysLast - pRom->GCPhys + 1) >> PAGE_SHIFT; for (uint32_t iPage = (GCPhys - pRom->GCPhys) >> PAGE_SHIFT; iPage < cPages; iPage++) { PPGMROMPAGE pRomPage = &pRom->aPages[iPage]; if (PGMROMPROT_IS_ROM(pRomPage->enmProt) != PGMROMPROT_IS_ROM(enmProt)) { fChanges = true; /* flush references to the page. */ PPGMPAGE pRamPage = pgmPhysGetPage(&pVM->pgm.s, pRom->GCPhys + (iPage << PAGE_SHIFT)); int rc2 = pgmPoolTrackFlushGCPhys(pVM, pRamPage, &fFlushTLB); if (rc2 != VINF_SUCCESS && (rc == VINF_SUCCESS || RT_FAILURE(rc2))) rc = rc2; PPGMPAGE pOld = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Virgin : &pRomPage->Shadow; PPGMPAGE pNew = PGMROMPROT_IS_ROM(pRomPage->enmProt) ? &pRomPage->Shadow : &pRomPage->Virgin; *pOld = *pRamPage; *pRamPage = *pNew; /** @todo preserve the volatile flags (handlers) when these have been moved out of HCPhys! */ } pRomPage->enmProt = enmProt; } /* * Reset the access handler if we made changes, no need * to optimize this. */ if (fChanges) { int rc = PGMHandlerPhysicalReset(pVM, pRom->GCPhys); if (RT_FAILURE(rc)) { pgmUnlock(pVM); AssertRC(rc); return rc; } } /* Advance - cb isn't updated. */ GCPhys = pRom->GCPhys + (cPages << PAGE_SHIFT); } } pgmUnlock(pVM); if (fFlushTLB) PGM_INVL_ALL_VCPU_TLBS(pVM); return rc; } /** * Sets the Address Gate 20 state. * * @param pVCpu The VCPU to operate on. * @param fEnable True if the gate should be enabled. * False if the gate should be disabled. */ VMMDECL(void) PGMR3PhysSetA20(PVMCPU pVCpu, bool fEnable) { LogFlow(("PGMR3PhysSetA20 %d (was %d)\n", fEnable, pVCpu->pgm.s.fA20Enabled)); if (pVCpu->pgm.s.fA20Enabled != fEnable) { pVCpu->pgm.s.fA20Enabled = fEnable; pVCpu->pgm.s.GCPhysA20Mask = ~(RTGCPHYS)(!fEnable << 20); REMR3A20Set(pVCpu->pVMR3, pVCpu, fEnable); /** @todo we're not handling this correctly for VT-x / AMD-V. See #2911 */ } } /** * Tree enumeration callback for dealing with age rollover. * It will perform a simple compression of the current age. */ static DECLCALLBACK(int) pgmR3PhysChunkAgeingRolloverCallback(PAVLU32NODECORE pNode, void *pvUser) { Assert(PGMIsLockOwner((PVM)pvUser)); /* Age compression - ASSUMES iNow == 4. */ PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode; if (pChunk->iAge >= UINT32_C(0xffffff00)) pChunk->iAge = 3; else if (pChunk->iAge >= UINT32_C(0xfffff000)) pChunk->iAge = 2; else if (pChunk->iAge) pChunk->iAge = 1; else /* iAge = 0 */ pChunk->iAge = 4; /* reinsert */ PVM pVM = (PVM)pvUser; RTAvllU32Remove(&pVM->pgm.s.ChunkR3Map.pAgeTree, pChunk->AgeCore.Key); pChunk->AgeCore.Key = pChunk->iAge; RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore); return 0; } /** * Tree enumeration callback that updates the chunks that have * been used since the last */ static DECLCALLBACK(int) pgmR3PhysChunkAgeingCallback(PAVLU32NODECORE pNode, void *pvUser) { PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)pNode; if (!pChunk->iAge) { PVM pVM = (PVM)pvUser; RTAvllU32Remove(&pVM->pgm.s.ChunkR3Map.pAgeTree, pChunk->AgeCore.Key); pChunk->AgeCore.Key = pChunk->iAge = pVM->pgm.s.ChunkR3Map.iNow; RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore); } return 0; } /** * Performs ageing of the ring-3 chunk mappings. * * @param pVM The VM handle. */ VMMR3DECL(void) PGMR3PhysChunkAgeing(PVM pVM) { pgmLock(pVM); pVM->pgm.s.ChunkR3Map.AgeingCountdown = RT_MIN(pVM->pgm.s.ChunkR3Map.cMax / 4, 1024); pVM->pgm.s.ChunkR3Map.iNow++; if (pVM->pgm.s.ChunkR3Map.iNow == 0) { pVM->pgm.s.ChunkR3Map.iNow = 4; RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /*fFromLeft*/, pgmR3PhysChunkAgeingRolloverCallback, pVM); } else RTAvlU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pTree, true /*fFromLeft*/, pgmR3PhysChunkAgeingCallback, pVM); pgmUnlock(pVM); } /** * The structure passed in the pvUser argument of pgmR3PhysChunkUnmapCandidateCallback(). */ typedef struct PGMR3PHYSCHUNKUNMAPCB { PVM pVM; /**< The VM handle. */ PPGMCHUNKR3MAP pChunk; /**< The chunk to unmap. */ } PGMR3PHYSCHUNKUNMAPCB, *PPGMR3PHYSCHUNKUNMAPCB; /** * Callback used to find the mapping that's been unused for * the longest time. */ static DECLCALLBACK(int) pgmR3PhysChunkUnmapCandidateCallback(PAVLLU32NODECORE pNode, void *pvUser) { do { PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)((uint8_t *)pNode - RT_OFFSETOF(PGMCHUNKR3MAP, AgeCore)); if ( pChunk->iAge && !pChunk->cRefs) { /* * Check that it's not in any of the TLBs. */ PVM pVM = ((PPGMR3PHYSCHUNKUNMAPCB)pvUser)->pVM; for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++) if (pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk == pChunk) { pChunk = NULL; break; } if (pChunk) for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.PhysTlbHC.aEntries); i++) if (pVM->pgm.s.PhysTlbHC.aEntries[i].pMap == pChunk) { pChunk = NULL; break; } if (pChunk) { ((PPGMR3PHYSCHUNKUNMAPCB)pvUser)->pChunk = pChunk; return 1; /* done */ } } /* next with the same age - this version of the AVL API doesn't enumerate the list, so we have to do it. */ pNode = pNode->pList; } while (pNode); return 0; } /** * Finds a good candidate for unmapping when the ring-3 mapping cache is full. * * The candidate will not be part of any TLBs, so no need to flush * anything afterwards. * * @returns Chunk id. * @param pVM The VM handle. */ static int32_t pgmR3PhysChunkFindUnmapCandidate(PVM pVM) { Assert(PGMIsLockOwner(pVM)); /* * Do tree ageing first? */ if (pVM->pgm.s.ChunkR3Map.AgeingCountdown-- == 0) PGMR3PhysChunkAgeing(pVM); /* * Enumerate the age tree starting with the left most node. */ PGMR3PHYSCHUNKUNMAPCB Args; Args.pVM = pVM; Args.pChunk = NULL; if (RTAvllU32DoWithAll(&pVM->pgm.s.ChunkR3Map.pAgeTree, true /*fFromLeft*/, pgmR3PhysChunkUnmapCandidateCallback, pVM)) return Args.pChunk->Core.Key; return INT32_MAX; } /** * Maps the given chunk into the ring-3 mapping cache. * * This will call ring-0. * * @returns VBox status code. * @param pVM The VM handle. * @param idChunk The chunk in question. * @param ppChunk Where to store the chunk tracking structure. * * @remarks Called from within the PGM critical section. */ int pgmR3PhysChunkMap(PVM pVM, uint32_t idChunk, PPPGMCHUNKR3MAP ppChunk) { int rc; Assert(PGMIsLockOwner(pVM)); /* * Allocate a new tracking structure first. */ #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3HeapAlloc(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk)); #else PPGMCHUNKR3MAP pChunk = (PPGMCHUNKR3MAP)MMR3UkHeapAlloc(pVM, MM_TAG_PGM_CHUNK_MAPPING, sizeof(*pChunk), NULL); #endif AssertReturn(pChunk, VERR_NO_MEMORY); pChunk->Core.Key = idChunk; pChunk->AgeCore.Key = pVM->pgm.s.ChunkR3Map.iNow; pChunk->iAge = 0; pChunk->cRefs = 0; pChunk->cPermRefs = 0; pChunk->pv = NULL; /* * Request the ring-0 part to map the chunk in question and if * necessary unmap another one to make space in the mapping cache. */ GMMMAPUNMAPCHUNKREQ Req; Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC; Req.Hdr.cbReq = sizeof(Req); Req.pvR3 = NULL; Req.idChunkMap = idChunk; Req.idChunkUnmap = NIL_GMM_CHUNKID; if (pVM->pgm.s.ChunkR3Map.c >= pVM->pgm.s.ChunkR3Map.cMax) Req.idChunkUnmap = pgmR3PhysChunkFindUnmapCandidate(pVM); /** @todo This is wrong. Any thread in the VM process should be able to do this, * there are depenenecies on this. What currently saves the day is that * we don't unmap anything and that all non-zero memory will therefore * be present when non-EMTs tries to access it. */ rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr); if (RT_SUCCESS(rc)) { /* * Update the tree. */ /* insert the new one. */ AssertPtr(Req.pvR3); pChunk->pv = Req.pvR3; bool fRc = RTAvlU32Insert(&pVM->pgm.s.ChunkR3Map.pTree, &pChunk->Core); AssertRelease(fRc); pVM->pgm.s.ChunkR3Map.c++; fRc = RTAvllU32Insert(&pVM->pgm.s.ChunkR3Map.pAgeTree, &pChunk->AgeCore); AssertRelease(fRc); /* remove the unmapped one. */ if (Req.idChunkUnmap != NIL_GMM_CHUNKID) { PPGMCHUNKR3MAP pUnmappedChunk = (PPGMCHUNKR3MAP)RTAvlU32Remove(&pVM->pgm.s.ChunkR3Map.pTree, Req.idChunkUnmap); AssertRelease(pUnmappedChunk); pUnmappedChunk->pv = NULL; pUnmappedChunk->Core.Key = UINT32_MAX; #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE MMR3HeapFree(pUnmappedChunk); #else MMR3UkHeapFree(pVM, pUnmappedChunk, MM_TAG_PGM_CHUNK_MAPPING); #endif pVM->pgm.s.ChunkR3Map.c--; } } else { AssertRC(rc); #ifdef VBOX_WITH_2X_4GB_ADDR_SPACE MMR3HeapFree(pChunk); #else MMR3UkHeapFree(pVM, pChunk, MM_TAG_PGM_CHUNK_MAPPING); #endif pChunk = NULL; } *ppChunk = pChunk; return rc; } /** * For VMMCALLRING3_PGM_MAP_CHUNK, considered internal. * * @returns see pgmR3PhysChunkMap. * @param pVM The VM handle. * @param idChunk The chunk to map. */ VMMR3DECL(int) PGMR3PhysChunkMap(PVM pVM, uint32_t idChunk) { PPGMCHUNKR3MAP pChunk; int rc; pgmLock(pVM); rc = pgmR3PhysChunkMap(pVM, idChunk, &pChunk); pgmUnlock(pVM); return rc; } /** * Invalidates the TLB for the ring-3 mapping cache. * * @param pVM The VM handle. */ VMMR3DECL(void) PGMR3PhysChunkInvalidateTLB(PVM pVM) { pgmLock(pVM); for (unsigned i = 0; i < RT_ELEMENTS(pVM->pgm.s.ChunkR3Map.Tlb.aEntries); i++) { pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].idChunk = NIL_GMM_CHUNKID; pVM->pgm.s.ChunkR3Map.Tlb.aEntries[i].pChunk = NULL; } pgmUnlock(pVM); } /** * Response to VM_FF_PGM_NEED_HANDY_PAGES and VMMCALLRING3_PGM_ALLOCATE_HANDY_PAGES. * * This function will also work the VM_FF_PGM_NO_MEMORY force action flag, to * signal and clear the out of memory condition. When contracted, this API is * used to try clear the condition when the user wants to resume. * * @returns The following VBox status codes. * @retval VINF_SUCCESS on success. FFs cleared. * @retval VINF_EM_NO_MEMORY if we're out of memory. The FF is not cleared in * this case and it gets accompanied by VM_FF_PGM_NO_MEMORY. * * @param pVM The VM handle. * * @remarks The VINF_EM_NO_MEMORY status is for the benefit of the FF processing * in EM.cpp and shouldn't be propagated outside TRPM, HWACCM, EM and * pgmPhysEnsureHandyPage. There is one exception to this in the \#PF * handler. */ VMMR3DECL(int) PGMR3PhysAllocateHandyPages(PVM pVM) { pgmLock(pVM); /* * Allocate more pages, noting down the index of the first new page. */ uint32_t iClear = pVM->pgm.s.cHandyPages; AssertMsgReturn(iClear <= RT_ELEMENTS(pVM->pgm.s.aHandyPages), ("%d", iClear), VERR_INTERNAL_ERROR); Log(("PGMR3PhysAllocateHandyPages: %d -> %d\n", iClear, RT_ELEMENTS(pVM->pgm.s.aHandyPages))); int rcAlloc = VINF_SUCCESS; int rcSeed = VINF_SUCCESS; int rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL); while (rc == VERR_GMM_SEED_ME) { void *pvChunk; rcAlloc = rc = SUPR3PageAlloc(GMM_CHUNK_SIZE >> PAGE_SHIFT, &pvChunk); if (RT_SUCCESS(rc)) { rcSeed = rc = VMMR3CallR0(pVM, VMMR0_DO_GMM_SEED_CHUNK, (uintptr_t)pvChunk, NULL); if (RT_FAILURE(rc)) SUPR3PageFree(pvChunk, GMM_CHUNK_SIZE >> PAGE_SHIFT); } if (RT_SUCCESS(rc)) rc = VMMR3CallR0(pVM, VMMR0_DO_PGM_ALLOCATE_HANDY_PAGES, 0, NULL); } if (RT_SUCCESS(rc)) { AssertMsg(rc == VINF_SUCCESS, ("%Rrc\n", rc)); Assert(pVM->pgm.s.cHandyPages > 0); VM_FF_CLEAR(pVM, VM_FF_PGM_NEED_HANDY_PAGES); VM_FF_CLEAR(pVM, VM_FF_PGM_NO_MEMORY); /* * Clear the pages. */ while (iClear < pVM->pgm.s.cHandyPages) { PGMMPAGEDESC pPage = &pVM->pgm.s.aHandyPages[iClear]; void *pv; rc = pgmPhysPageMapByPageID(pVM, pPage->idPage, pPage->HCPhysGCPhys, &pv); AssertLogRelMsgBreak(RT_SUCCESS(rc), ("idPage=%#x HCPhysGCPhys=%RHp rc=%Rrc", pPage->idPage, pPage->HCPhysGCPhys, rc)); ASMMemZeroPage(pv); iClear++; Log3(("PGMR3PhysAllocateHandyPages: idPage=%#x HCPhys=%RGp\n", pPage->idPage, pPage->HCPhysGCPhys)); } } else { /* * We should never get here unless there is a genuine shortage of * memory (or some internal error). Flag the error so the VM can be * suspended ASAP and the user informed. If we're totally out of * handy pages we will return failure. */ /* Report the failure. */ LogRel(("PGM: Failed to procure handy pages; rc=%Rrc rcAlloc=%Rrc rcSeed=%Rrc cHandyPages=%#x\n" " cAllPages=%#x cPrivatePages=%#x cSharedPages=%#x cZeroPages=%#x\n", rc, rcAlloc, rcSeed, pVM->pgm.s.cHandyPages, pVM->pgm.s.cAllPages, pVM->pgm.s.cPrivatePages, pVM->pgm.s.cSharedPages, pVM->pgm.s.cZeroPages)); if ( rc != VERR_NO_MEMORY && rc != VERR_LOCK_FAILED) { for (uint32_t i = 0; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++) { LogRel(("PGM: aHandyPages[#%#04x] = {.HCPhysGCPhys=%RHp, .idPage=%#08x, .idSharedPage=%#08x}\n", i, pVM->pgm.s.aHandyPages[i].HCPhysGCPhys, pVM->pgm.s.aHandyPages[i].idPage, pVM->pgm.s.aHandyPages[i].idSharedPage)); uint32_t const idPage = pVM->pgm.s.aHandyPages[i].idPage; if (idPage != NIL_GMM_PAGEID) { for (PPGMRAMRANGE pRam = pVM->pgm.s.pRamRangesR3; pRam; pRam = pRam->pNextR3) { uint32_t const cPages = pRam->cb >> PAGE_SHIFT; for (uint32_t iPage = 0; iPage < cPages; iPage++) if (PGM_PAGE_GET_PAGEID(&pRam->aPages[iPage]) == idPage) LogRel(("PGM: Used by %RGp %R[pgmpage] (%s)\n", pRam->GCPhys + ((RTGCPHYS)iPage << PAGE_SHIFT), &pRam->aPages[iPage], pRam->pszDesc)); } } } } /* Set the FFs and adjust rc. */ VM_FF_SET(pVM, VM_FF_PGM_NEED_HANDY_PAGES); VM_FF_SET(pVM, VM_FF_PGM_NO_MEMORY); if ( rc == VERR_NO_MEMORY || rc == VERR_LOCK_FAILED) rc = VINF_EM_NO_MEMORY; } pgmUnlock(pVM); return rc; } /** * Frees the specified RAM page and replaces it with the ZERO page. * * This is used by ballooning, remapping MMIO2 and RAM reset. * * @param pVM Pointer to the shared VM structure. * @param pReq Pointer to the request. * @param pPage Pointer to the page structure. * @param GCPhys The guest physical address of the page, if applicable. * * @remarks The caller must own the PGM lock. */ static int pgmPhysFreePage(PVM pVM, PGMMFREEPAGESREQ pReq, uint32_t *pcPendingPages, PPGMPAGE pPage, RTGCPHYS GCPhys) { /* * Assert sanity. */ Assert(PGMIsLockOwner(pVM)); if (RT_UNLIKELY( PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_RAM && PGM_PAGE_GET_TYPE(pPage) != PGMPAGETYPE_ROM_SHADOW)) { AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage)); return VMSetError(pVM, VERR_PGM_PHYS_NOT_RAM, RT_SRC_POS, "GCPhys=%RGp type=%d", GCPhys, PGM_PAGE_GET_TYPE(pPage)); } if (PGM_PAGE_GET_STATE(pPage) == PGM_PAGE_STATE_ZERO) return VINF_SUCCESS; const uint32_t idPage = PGM_PAGE_GET_PAGEID(pPage); Log3(("pgmPhysFreePage: idPage=%#x HCPhys=%RGp pPage=%R[pgmpage]\n", idPage, pPage)); if (RT_UNLIKELY( idPage == NIL_GMM_PAGEID || idPage > GMM_PAGEID_LAST || PGM_PAGE_GET_CHUNKID(pPage) == NIL_GMM_CHUNKID)) { AssertMsgFailed(("GCPhys=%RGp pPage=%R[pgmpage]\n", GCPhys, pPage)); return VMSetError(pVM, VERR_PGM_PHYS_INVALID_PAGE_ID, RT_SRC_POS, "GCPhys=%RGp idPage=%#x", GCPhys, pPage); } /* update page count stats. */ if (PGM_PAGE_IS_SHARED(pPage)) pVM->pgm.s.cSharedPages--; else pVM->pgm.s.cPrivatePages--; pVM->pgm.s.cZeroPages++; /* * pPage = ZERO page. */ PGM_PAGE_SET_HCPHYS(pPage, pVM->pgm.s.HCPhysZeroPg); PGM_PAGE_SET_STATE(pPage, PGM_PAGE_STATE_ZERO); PGM_PAGE_SET_PAGEID(pPage, NIL_GMM_PAGEID); /* * Make sure it's not in the handy page array. */ for (uint32_t i = pVM->pgm.s.cHandyPages; i < RT_ELEMENTS(pVM->pgm.s.aHandyPages); i++) { if (pVM->pgm.s.aHandyPages[i].idPage == idPage) { pVM->pgm.s.aHandyPages[i].idPage = NIL_GMM_PAGEID; break; } if (pVM->pgm.s.aHandyPages[i].idSharedPage == idPage) { pVM->pgm.s.aHandyPages[i].idSharedPage = NIL_GMM_PAGEID; break; } } /* * Push it onto the page array. */ uint32_t iPage = *pcPendingPages; Assert(iPage < PGMPHYS_FREE_PAGE_BATCH_SIZE); *pcPendingPages += 1; pReq->aPages[iPage].idPage = idPage; if (iPage + 1 < PGMPHYS_FREE_PAGE_BATCH_SIZE) return VINF_SUCCESS; /* * Flush the pages. */ int rc = GMMR3FreePagesPerform(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE); if (RT_SUCCESS(rc)) { GMMR3FreePagesRePrep(pVM, pReq, PGMPHYS_FREE_PAGE_BATCH_SIZE, GMMACCOUNT_BASE); *pcPendingPages = 0; } return rc; } /** * Converts a GC physical address to a HC ring-3 pointer, with some * additional checks. * * @returns VBox status code. * @retval VINF_SUCCESS on success. * @retval VINF_PGM_PHYS_TLB_CATCH_WRITE and *ppv set if the page has a write * access handler of some kind. * @retval VERR_PGM_PHYS_TLB_CATCH_ALL if the page has a handler catching all * accesses or is odd in any way. * @retval VERR_PGM_PHYS_TLB_UNASSIGNED if the page doesn't exist. * * @param pVM The VM handle. * @param GCPhys The GC physical address to convert. * @param fWritable Whether write access is required. * @param ppv Where to store the pointer corresponding to GCPhys on * success. */ VMMR3DECL(int) PGMR3PhysTlbGCPhys2Ptr(PVM pVM, RTGCPHYS GCPhys, bool fWritable, void **ppv) { pgmLock(pVM); PPGMRAMRANGE pRam; PPGMPAGE pPage; int rc = pgmPhysGetPageAndRangeEx(&pVM->pgm.s, GCPhys, &pPage, &pRam); if (RT_SUCCESS(rc)) { if (!PGM_PAGE_HAS_ANY_HANDLERS(pPage)) rc = VINF_SUCCESS; else { if (PGM_PAGE_HAS_ACTIVE_ALL_HANDLERS(pPage)) /* catches MMIO */ rc = VERR_PGM_PHYS_TLB_CATCH_ALL; else if (PGM_PAGE_HAS_ACTIVE_HANDLERS(pPage)) { /** @todo Handle TLB loads of virtual handlers so ./test.sh can be made to work * in -norawr0 mode. */ if (fWritable) rc = VINF_PGM_PHYS_TLB_CATCH_WRITE; } else { /* Temporarily disabled physical handler(s), since the recompiler doesn't get notified when it's reset we'll have to pretend it's operating normally. */ if (pgmHandlerPhysicalIsAll(pVM, GCPhys)) rc = VERR_PGM_PHYS_TLB_CATCH_ALL; else rc = VINF_PGM_PHYS_TLB_CATCH_WRITE; } } if (RT_SUCCESS(rc)) { int rc2; /* Make sure what we return is writable. */ if (fWritable && rc != VINF_PGM_PHYS_TLB_CATCH_WRITE) switch (PGM_PAGE_GET_STATE(pPage)) { case PGM_PAGE_STATE_ALLOCATED: break; case PGM_PAGE_STATE_ZERO: case PGM_PAGE_STATE_SHARED: case PGM_PAGE_STATE_WRITE_MONITORED: rc2 = pgmPhysPageMakeWritable(pVM, pPage, GCPhys & ~(RTGCPHYS)PAGE_OFFSET_MASK); AssertLogRelRCReturn(rc2, rc2); break; } /* Get a ring-3 mapping of the address. */ PPGMPAGER3MAPTLBE pTlbe; rc2 = pgmPhysPageQueryTlbe(&pVM->pgm.s, GCPhys, &pTlbe); AssertLogRelRCReturn(rc2, rc2); *ppv = (void *)((uintptr_t)pTlbe->pv | (GCPhys & PAGE_OFFSET_MASK)); /** @todo mapping/locking hell; this isn't horribly efficient since * pgmPhysPageLoadIntoTlb will repeat the lookup we've done here. */ Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage] *ppv=%p\n", GCPhys, rc, pPage, *ppv)); } else Log6(("PGMR3PhysTlbGCPhys2Ptr: GCPhys=%RGp rc=%Rrc pPage=%R[pgmpage]\n", GCPhys, rc, pPage)); /* else: handler catching all access, no pointer returned. */ } else rc = VERR_PGM_PHYS_TLB_UNASSIGNED; pgmUnlock(pVM); return rc; }