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/* $Id$ */
/** @file
* IOM - Host Context Ring 0, MMIO.
*/
/*
* Copyright (C) 2006-2022 Oracle Corporation
*
* 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_IOM_MMIO
#include <VBox/vmm/iom.h>
#include "IOMInternal.h"
#include <VBox/vmm/pdmdev.h>
#include <VBox/vmm/vmcc.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <iprt/assert.h>
#include <iprt/mem.h>
#include <iprt/memobj.h>
#include <iprt/process.h>
#include <iprt/string.h>
/**
* Initializes the MMIO related members.
*
* @param pGVM Pointer to the global VM structure.
*/
void iomR0MmioInitPerVMData(PGVM pGVM)
{
pGVM->iomr0.s.hMmioMapObj = NIL_RTR0MEMOBJ;
pGVM->iomr0.s.hMmioMemObj = NIL_RTR0MEMOBJ;
#ifdef VBOX_WITH_STATISTICS
pGVM->iomr0.s.hMmioStatsMapObj = NIL_RTR0MEMOBJ;
pGVM->iomr0.s.hMmioStatsMemObj = NIL_RTR0MEMOBJ;
#endif
}
/**
* Cleans up MMIO related resources.
*/
void iomR0MmioCleanupVM(PGVM pGVM)
{
RTR0MemObjFree(pGVM->iomr0.s.hMmioMapObj, true /*fFreeMappings*/);
pGVM->iomr0.s.hMmioMapObj = NIL_RTR0MEMOBJ;
RTR0MemObjFree(pGVM->iomr0.s.hMmioMemObj, true /*fFreeMappings*/);
pGVM->iomr0.s.hMmioMemObj = NIL_RTR0MEMOBJ;
#ifdef VBOX_WITH_STATISTICS
RTR0MemObjFree(pGVM->iomr0.s.hMmioStatsMapObj, true /*fFreeMappings*/);
pGVM->iomr0.s.hMmioStatsMapObj = NIL_RTR0MEMOBJ;
RTR0MemObjFree(pGVM->iomr0.s.hMmioStatsMemObj, true /*fFreeMappings*/);
pGVM->iomr0.s.hMmioStatsMemObj = NIL_RTR0MEMOBJ;
#endif
}
/**
* Implements PDMDEVHLPR0::pfnMmioSetUpContext.
*
* @param pGVM The global (ring-0) VM structure.
* @param pDevIns The device instance.
* @param hRegion The MMIO region handle (already registered in
* ring-3).
* @param pfnWrite The write handler callback, optional.
* @param pfnRead The read handler callback, optional.
* @param pfnFill The fill handler callback, optional.
* @param pvUser User argument for the callbacks.
* @thread EMT(0)
* @note Only callable at VM creation time.
*/
VMMR0_INT_DECL(int) IOMR0MmioSetUpContext(PGVM pGVM, PPDMDEVINS pDevIns, IOMMMIOHANDLE hRegion, PFNIOMMMIONEWWRITE pfnWrite,
PFNIOMMMIONEWREAD pfnRead, PFNIOMMMIONEWFILL pfnFill, void *pvUser)
{
/*
* Validate input and state.
*/
VM_ASSERT_EMT0_RETURN(pGVM, VERR_VM_THREAD_NOT_EMT);
VM_ASSERT_STATE_RETURN(pGVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
AssertReturn(hRegion < pGVM->iomr0.s.cMmioAlloc, VERR_IOM_INVALID_MMIO_HANDLE);
AssertReturn(hRegion < pGVM->iom.s.cMmioRegs, VERR_IOM_INVALID_MMIO_HANDLE);
AssertPtrReturn(pDevIns, VERR_INVALID_HANDLE);
AssertReturn(pDevIns->pDevInsForR3 != NIL_RTR3PTR && !(pDevIns->pDevInsForR3 & HOST_PAGE_OFFSET_MASK), VERR_INVALID_PARAMETER);
AssertReturn(pGVM->iomr0.s.paMmioRing3Regs[hRegion].pDevIns == pDevIns->pDevInsForR3, VERR_IOM_INVALID_MMIO_HANDLE);
AssertReturn(pGVM->iomr0.s.paMmioRegs[hRegion].pDevIns == NULL, VERR_WRONG_ORDER);
Assert(pGVM->iomr0.s.paMmioRegs[hRegion].idxSelf == hRegion);
AssertReturn(pfnWrite || pfnRead || pfnFill, VERR_INVALID_PARAMETER);
AssertPtrNullReturn(pfnWrite, VERR_INVALID_POINTER);
AssertPtrNullReturn(pfnRead, VERR_INVALID_POINTER);
AssertPtrNullReturn(pfnFill, VERR_INVALID_POINTER);
uint32_t const fFlags = pGVM->iomr0.s.paMmioRing3Regs[hRegion].fFlags;
RTGCPHYS const cbRegion = pGVM->iomr0.s.paMmioRing3Regs[hRegion].cbRegion;
AssertMsgReturn(cbRegion > 0 && cbRegion <= _1T, ("cbRegion=%#RGp\n", cbRegion), VERR_IOM_INVALID_MMIO_HANDLE);
/*
* Do the job.
*/
pGVM->iomr0.s.paMmioRegs[hRegion].cbRegion = cbRegion;
pGVM->iomr0.s.paMmioRegs[hRegion].pvUser = pvUser;
pGVM->iomr0.s.paMmioRegs[hRegion].pDevIns = pDevIns;
pGVM->iomr0.s.paMmioRegs[hRegion].pfnWriteCallback = pfnWrite;
pGVM->iomr0.s.paMmioRegs[hRegion].pfnReadCallback = pfnRead;
pGVM->iomr0.s.paMmioRegs[hRegion].pfnFillCallback = pfnFill;
pGVM->iomr0.s.paMmioRegs[hRegion].fFlags = fFlags;
#ifdef VBOX_WITH_STATISTICS
uint16_t const idxStats = pGVM->iomr0.s.paMmioRing3Regs[hRegion].idxStats;
pGVM->iomr0.s.paMmioRegs[hRegion].idxStats = (uint32_t)idxStats < pGVM->iomr0.s.cMmioStatsAllocation
? idxStats : UINT16_MAX;
#else
pGVM->iomr0.s.paMmioRegs[hRegion].idxStats = UINT16_MAX;
#endif
pGVM->iomr0.s.paMmioRing3Regs[hRegion].fRing0 = true;
return VINF_SUCCESS;
}
/**
* Grows the MMIO registration (all contexts) and lookup tables.
*
* @returns VBox status code.
* @param pGVM The global (ring-0) VM structure.
* @param cReqMinEntries The minimum growth (absolute).
* @thread EMT(0)
* @note Only callable at VM creation time.
*/
VMMR0_INT_DECL(int) IOMR0MmioGrowRegistrationTables(PGVM pGVM, uint64_t cReqMinEntries)
{
/*
* Validate input and state.
*/
VM_ASSERT_EMT0_RETURN(pGVM, VERR_VM_THREAD_NOT_EMT);
VM_ASSERT_STATE_RETURN(pGVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
AssertReturn(cReqMinEntries <= _4K, VERR_IOM_TOO_MANY_MMIO_REGISTRATIONS);
uint32_t cNewEntries = (uint32_t)cReqMinEntries;
AssertReturn(cNewEntries >= pGVM->iom.s.cMmioAlloc, VERR_IOM_MMIO_IPE_1);
uint32_t const cOldEntries = pGVM->iomr0.s.cMmioAlloc;
ASMCompilerBarrier();
AssertReturn(cNewEntries >= cOldEntries, VERR_IOM_MMIO_IPE_2);
AssertReturn(pGVM->iom.s.cMmioRegs >= pGVM->iomr0.s.cMmioMax, VERR_IOM_MMIO_IPE_3);
/*
* Allocate the new tables. We use a single allocation for the three tables (ring-0,
* ring-3, lookup) and does a partial mapping of the result to ring-3.
*/
uint32_t const cbRing0 = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOENTRYR0), HOST_PAGE_SIZE);
uint32_t const cbRing3 = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOENTRYR3), HOST_PAGE_SIZE);
uint32_t const cbShared = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOLOOKUPENTRY), HOST_PAGE_SIZE);
uint32_t const cbNew = cbRing0 + cbRing3 + cbShared;
/* Use the rounded up space as best we can. */
cNewEntries = RT_MIN(RT_MIN(cbRing0 / sizeof(IOMMMIOENTRYR0), cbRing3 / sizeof(IOMMMIOENTRYR3)),
cbShared / sizeof(IOMMMIOLOOKUPENTRY));
RTR0MEMOBJ hMemObj;
int rc = RTR0MemObjAllocPage(&hMemObj, cbNew, false /*fExecutable*/);
if (RT_SUCCESS(rc))
{
/*
* Zero and map it.
*/
RT_BZERO(RTR0MemObjAddress(hMemObj), cbNew);
RTR0MEMOBJ hMapObj;
rc = RTR0MemObjMapUserEx(&hMapObj, hMemObj, (RTR3PTR)-1, HOST_PAGE_SIZE, RTMEM_PROT_READ | RTMEM_PROT_WRITE,
RTR0ProcHandleSelf(), cbRing0, cbNew - cbRing0);
if (RT_SUCCESS(rc))
{
PIOMMMIOENTRYR0 const paRing0 = (PIOMMMIOENTRYR0)RTR0MemObjAddress(hMemObj);
PIOMMMIOENTRYR3 const paRing3 = (PIOMMMIOENTRYR3)((uintptr_t)paRing0 + cbRing0);
PIOMMMIOLOOKUPENTRY const paLookup = (PIOMMMIOLOOKUPENTRY)((uintptr_t)paRing3 + cbRing3);
RTR3UINTPTR const uAddrRing3 = RTR0MemObjAddressR3(hMapObj);
/*
* Copy over the old info and initialize the idxSelf and idxStats members.
*/
if (pGVM->iomr0.s.paMmioRegs != NULL)
{
memcpy(paRing0, pGVM->iomr0.s.paMmioRegs, sizeof(paRing0[0]) * cOldEntries);
memcpy(paRing3, pGVM->iomr0.s.paMmioRing3Regs, sizeof(paRing3[0]) * cOldEntries);
memcpy(paLookup, pGVM->iomr0.s.paMmioLookup, sizeof(paLookup[0]) * cOldEntries);
}
size_t i = cbRing0 / sizeof(*paRing0);
while (i-- > cOldEntries)
{
paRing0[i].idxSelf = (uint16_t)i;
paRing0[i].idxStats = UINT16_MAX;
}
i = cbRing3 / sizeof(*paRing3);
while (i-- > cOldEntries)
{
paRing3[i].idxSelf = (uint16_t)i;
paRing3[i].idxStats = UINT16_MAX;
}
/*
* Switch the memory handles.
*/
RTR0MEMOBJ hTmp = pGVM->iomr0.s.hMmioMapObj;
pGVM->iomr0.s.hMmioMapObj = hMapObj;
hMapObj = hTmp;
hTmp = pGVM->iomr0.s.hMmioMemObj;
pGVM->iomr0.s.hMmioMemObj = hMemObj;
hMemObj = hTmp;
/*
* Update the variables.
*/
pGVM->iomr0.s.paMmioRegs = paRing0;
pGVM->iomr0.s.paMmioRing3Regs = paRing3;
pGVM->iomr0.s.paMmioLookup = paLookup;
pGVM->iom.s.paMmioRegs = uAddrRing3;
pGVM->iom.s.paMmioLookup = uAddrRing3 + cbRing3;
pGVM->iom.s.cMmioAlloc = cNewEntries;
pGVM->iomr0.s.cMmioAlloc = cNewEntries;
/*
* Free the old allocation.
*/
RTR0MemObjFree(hMapObj, true /*fFreeMappings*/);
}
RTR0MemObjFree(hMemObj, true /*fFreeMappings*/);
}
return rc;
}
/**
* Grows the MMIO statistics table.
*
* @returns VBox status code.
* @param pGVM The global (ring-0) VM structure.
* @param cReqMinEntries The minimum growth (absolute).
* @thread EMT(0)
* @note Only callable at VM creation time.
*/
VMMR0_INT_DECL(int) IOMR0MmioGrowStatisticsTable(PGVM pGVM, uint64_t cReqMinEntries)
{
/*
* Validate input and state.
*/
VM_ASSERT_EMT0_RETURN(pGVM, VERR_VM_THREAD_NOT_EMT);
VM_ASSERT_STATE_RETURN(pGVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
AssertReturn(cReqMinEntries <= _64K, VERR_IOM_TOO_MANY_MMIO_REGISTRATIONS);
uint32_t cNewEntries = (uint32_t)cReqMinEntries;
#ifdef VBOX_WITH_STATISTICS
uint32_t const cOldEntries = pGVM->iomr0.s.cMmioStatsAllocation;
ASMCompilerBarrier();
#else
uint32_t const cOldEntries = 0;
#endif
AssertReturn(cNewEntries > cOldEntries, VERR_IOM_MMIO_IPE_1);
AssertReturn(pGVM->iom.s.cMmioStatsAllocation == cOldEntries, VERR_IOM_MMIO_IPE_1);
AssertReturn(pGVM->iom.s.cMmioStats <= cOldEntries, VERR_IOM_MMIO_IPE_2);
#ifdef VBOX_WITH_STATISTICS
AssertReturn(!pGVM->iomr0.s.fMmioStatsFrozen, VERR_WRONG_ORDER);
#endif
/*
* Allocate a new table, zero it and map it.
*/
#ifndef VBOX_WITH_STATISTICS
AssertFailedReturn(VERR_NOT_SUPPORTED);
#else
uint32_t const cbNew = RT_ALIGN_32(cNewEntries * sizeof(IOMMMIOSTATSENTRY), HOST_PAGE_SIZE);
cNewEntries = cbNew / sizeof(IOMMMIOSTATSENTRY);
RTR0MEMOBJ hMemObj;
int rc = RTR0MemObjAllocPage(&hMemObj, cbNew, false /*fExecutable*/);
if (RT_SUCCESS(rc))
{
RT_BZERO(RTR0MemObjAddress(hMemObj), cbNew);
RTR0MEMOBJ hMapObj;
rc = RTR0MemObjMapUser(&hMapObj, hMemObj, (RTR3PTR)-1, HOST_PAGE_SIZE,
RTMEM_PROT_READ | RTMEM_PROT_WRITE, RTR0ProcHandleSelf());
if (RT_SUCCESS(rc))
{
PIOMMMIOSTATSENTRY pMmioStats = (PIOMMMIOSTATSENTRY)RTR0MemObjAddress(hMemObj);
/*
* Anything to copy over and free up?
*/
if (pGVM->iomr0.s.paMmioStats)
memcpy(pMmioStats, pGVM->iomr0.s.paMmioStats, cOldEntries * sizeof(IOMMMIOSTATSENTRY));
/*
* Switch the memory handles.
*/
RTR0MEMOBJ hTmp = pGVM->iomr0.s.hMmioStatsMapObj;
pGVM->iomr0.s.hMmioStatsMapObj = hMapObj;
hMapObj = hTmp;
hTmp = pGVM->iomr0.s.hMmioStatsMemObj;
pGVM->iomr0.s.hMmioStatsMemObj = hMemObj;
hMemObj = hTmp;
/*
* Update the variables.
*/
pGVM->iomr0.s.paMmioStats = pMmioStats;
pGVM->iom.s.paMmioStats = RTR0MemObjAddressR3(pGVM->iomr0.s.hMmioStatsMapObj);
pGVM->iom.s.cMmioStatsAllocation = cNewEntries;
pGVM->iomr0.s.cMmioStatsAllocation = cNewEntries;
/*
* Free the old allocation.
*/
RTR0MemObjFree(hMapObj, true /*fFreeMappings*/);
}
RTR0MemObjFree(hMemObj, true /*fFreeMappings*/);
}
return rc;
#endif /* VBOX_WITH_STATISTICS */
}
/**
* Called after all devices has been instantiated to copy over the statistics
* indices to the ring-0 MMIO registration table.
*
* This simplifies keeping statistics for MMIO ranges that are ring-3 only.
*
* @returns VBox status code.
* @param pGVM The global (ring-0) VM structure.
* @thread EMT(0)
* @note Only callable at VM creation time.
*/
VMMR0_INT_DECL(int) IOMR0MmioSyncStatisticsIndices(PGVM pGVM)
{
VM_ASSERT_EMT0_RETURN(pGVM, VERR_VM_THREAD_NOT_EMT);
VM_ASSERT_STATE_RETURN(pGVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE);
#ifdef VBOX_WITH_STATISTICS
/*
* First, freeze the statistics array:
*/
pGVM->iomr0.s.fMmioStatsFrozen = true;
/*
* Second, synchronize the indices:
*/
uint32_t const cRegs = RT_MIN(pGVM->iom.s.cMmioRegs, pGVM->iomr0.s.cMmioAlloc);
uint32_t const cStatsAlloc = pGVM->iomr0.s.cMmioStatsAllocation;
PIOMMMIOENTRYR0 paMmioRegs = pGVM->iomr0.s.paMmioRegs;
IOMMMIOENTRYR3 const *paMmioRegsR3 = pGVM->iomr0.s.paMmioRing3Regs;
AssertReturn((paMmioRegs && paMmioRegsR3) || cRegs == 0, VERR_IOM_MMIO_IPE_3);
for (uint32_t i = 0 ; i < cRegs; i++)
{
uint16_t idxStats = paMmioRegsR3[i].idxStats;
paMmioRegs[i].idxStats = idxStats < cStatsAlloc ? idxStats : UINT16_MAX;
}
#else
RT_NOREF(pGVM);
#endif
return VINF_SUCCESS;
}
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