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/* $Id: GVMMR3.cpp $ */
/** @file
* GVMM - Global VM Manager, ring-3 request wrappers.
*/
/*
* Copyright (C) 2021-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_GVMM
#include <VBox/vmm/gvmm.h>
#include <VBox/vmm/vmm.h>
#include <VBox/vmm/vmcc.h>
#include <VBox/vmm/uvm.h>
#include <VBox/sup.h>
#include <VBox/err.h>
#include <iprt/mem.h>
/**
* Driverless: VMMR0_DO_GVMM_CREATE_VM
*
* @returns VBox status code.
* @param pUVM The user mode VM handle.
* @param cCpus The number of CPUs to create the VM for.
* @param pSession The support driver session handle.
* @param ppVM Where to return the pointer to the VM structure.
* @param ppVMR0 Where to return the ring-0 address of the VM structure
* for use in VMMR0 calls.
*/
VMMR3_INT_DECL(int) GVMMR3CreateVM(PUVM pUVM, uint32_t cCpus, PSUPDRVSESSION pSession, PVM *ppVM, PRTR0PTR ppVMR0)
{
AssertReturn(cCpus >= VMM_MIN_CPU_COUNT && cCpus <= VMM_MAX_CPU_COUNT, VERR_INVALID_PARAMETER);
AssertCompile((sizeof(VM) & HOST_PAGE_OFFSET_MASK) == 0);
AssertCompile((sizeof(VMCPU) & HOST_PAGE_OFFSET_MASK) == 0);
int rc;
if (!SUPR3IsDriverless())
{
GVMMCREATEVMREQ CreateVMReq;
CreateVMReq.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
CreateVMReq.Hdr.cbReq = sizeof(CreateVMReq);
CreateVMReq.pSession = pSession;
CreateVMReq.pVMR0 = NIL_RTR0PTR;
CreateVMReq.pVMR3 = NULL;
CreateVMReq.cCpus = cCpus;
rc = SUPR3CallVMMR0Ex(NIL_RTR0PTR, NIL_VMCPUID, VMMR0_DO_GVMM_CREATE_VM, 0, &CreateVMReq.Hdr);
if (RT_SUCCESS(rc))
{
*ppVM = CreateVMReq.pVMR3;
*ppVMR0 = CreateVMReq.pVMR0;
}
}
else
{
/*
* Driverless.
*/
/* Allocate the VM structure: */
size_t const cbVM = sizeof(VM) + sizeof(VMCPU) * cCpus;
PVM pVM = (PVM)RTMemPageAlloc(cbVM + HOST_PAGE_SIZE * (1 + 2 * cCpus));
if (!pVM)
return VERR_NO_PAGE_MEMORY;
/* Set up guard pages: */
RTMemProtect(pVM, HOST_PAGE_SIZE, RTMEM_PROT_NONE);
pVM = (PVM)((uintptr_t)pVM + HOST_PAGE_SIZE);
RTMemProtect(pVM + 1, HOST_PAGE_SIZE, RTMEM_PROT_NONE);
/* VM: */
pVM->enmVMState = VMSTATE_CREATING;
pVM->pVMR3 = pVM;
pVM->hSelf = _1M;
pVM->pSession = pSession;
pVM->cCpus = cCpus;
pVM->uCpuExecutionCap = 100;
pVM->cbSelf = sizeof(VM);
pVM->cbVCpu = sizeof(VMCPU);
pVM->uStructVersion = 1;
/* CPUs: */
PVMCPU pVCpu = (PVMCPU)((uintptr_t)pVM + sizeof(VM) + HOST_PAGE_SIZE);
for (VMCPUID idxCpu = 0; idxCpu < cCpus; idxCpu++)
{
pVM->apCpusR3[idxCpu] = pVCpu;
pVCpu->enmState = VMCPUSTATE_STOPPED;
pVCpu->pVMR3 = pVM;
pVCpu->hNativeThread = NIL_RTNATIVETHREAD;
pVCpu->hNativeThreadR0 = NIL_RTNATIVETHREAD;
pVCpu->hThread = NIL_RTTHREAD;
pVCpu->idCpu = idxCpu;
RTMemProtect(pVCpu + 1, HOST_PAGE_SIZE, RTMEM_PROT_NONE);
pVCpu = (PVMCPU)((uintptr_t)pVCpu + sizeof(VMCPU) + HOST_PAGE_SIZE);
}
*ppVM = pVM;
*ppVMR0 = NIL_RTR0PTR;
}
RT_NOREF(pUVM);
return VINF_SUCCESS;
}
/**
* Driverless: VMMR0_DO_GVMM_DESTROY_VM
*
* @returns VBox status code.
* @param pUVM The user mode VM handle.
* @param pVM The cross context VM structure.
*/
VMMR3_INT_DECL(int) GVMMR3DestroyVM(PUVM pUVM, PVM pVM)
{
AssertPtrReturn(pVM, VERR_INVALID_VM_HANDLE);
Assert(pUVM->cCpus == pVM->cCpus);
RT_NOREF(pUVM);
int rc;
if (!SUPR3IsDriverless())
rc = SUPR3CallVMMR0Ex(pVM->pVMR0ForCall, 0 /*idCpu*/, VMMR0_DO_GVMM_DESTROY_VM, 0, NULL);
else
{
RTMemPageFree((uint8_t *)pVM - HOST_PAGE_SIZE,
sizeof(VM) + sizeof(VMCPU) * pVM->cCpus + HOST_PAGE_SIZE * (1 + 2 * pVM->cCpus));
rc = VINF_SUCCESS;
}
return rc;
}
/**
* Register the calling EMT with GVM.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param idCpu The Virtual CPU ID.
* @thread EMT(idCpu)
* @see GVMMR0RegisterVCpu
*/
VMMR3_INT_DECL(int) GVMMR3RegisterVCpu(PVM pVM, VMCPUID idCpu)
{
Assert(VMMGetCpuId(pVM) == idCpu);
int rc;
if (!SUPR3IsDriverless())
{
rc = SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), idCpu, VMMR0_DO_GVMM_REGISTER_VMCPU, 0, NULL);
if (RT_FAILURE(rc))
LogRel(("idCpu=%u rc=%Rrc\n", idCpu, rc));
}
else
rc = VINF_SUCCESS;
return rc;
}
/**
* Deregister the calling EMT from GVM.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
* @param idCpu The Virtual CPU ID.
* @thread EMT(idCpu)
* @see GVMMR0DeregisterVCpu
*/
VMMR3_INT_DECL(int) GVMMR3DeregisterVCpu(PVM pVM, VMCPUID idCpu)
{
Assert(VMMGetCpuId(pVM) == idCpu);
int rc;
if (!SUPR3IsDriverless())
rc = SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), idCpu, VMMR0_DO_GVMM_DEREGISTER_VMCPU, 0, NULL);
else
rc = VINF_SUCCESS;
return rc;
}
/**
* @see GVMMR0RegisterWorkerThread
*/
VMMR3_INT_DECL(int) GVMMR3RegisterWorkerThread(PVM pVM, GVMMWORKERTHREAD enmWorker)
{
if (SUPR3IsDriverless())
return VINF_SUCCESS;
GVMMREGISTERWORKERTHREADREQ Req;
Req.Hdr.u32Magic = SUPVMMR0REQHDR_MAGIC;
Req.Hdr.cbReq = sizeof(Req);
Req.hNativeThreadR3 = RTThreadNativeSelf();
return SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), NIL_VMCPUID,
VMMR0_DO_GVMM_REGISTER_WORKER_THREAD, (unsigned)enmWorker, &Req.Hdr);
}
/**
* @see GVMMR0DeregisterWorkerThread
*/
VMMR3_INT_DECL(int) GVMMR3DeregisterWorkerThread(PVM pVM, GVMMWORKERTHREAD enmWorker)
{
if (SUPR3IsDriverless())
return VINF_SUCCESS;
return SUPR3CallVMMR0Ex(VMCC_GET_VMR0_FOR_CALL(pVM), NIL_VMCPUID,
VMMR0_DO_GVMM_DEREGISTER_WORKER_THREAD, (unsigned)enmWorker, NULL);
}
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