130 lines
2.7 KiB
C++
130 lines
2.7 KiB
C++
/*
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* \brief VirtualBox hardware-acceleration manager
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* \author Norman Feske
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* \date 2013-08-20
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*/
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/*
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* Copyright (C) 2013 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/* Genode includes */
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#include <base/printf.h>
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/* VirtualBox includes */
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#include "HWACCMInternal.h" /* enable access to hwaccm.s.* */
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#include <VBox/vmm/hwaccm.h>
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#include <VBox/vmm/vm.h>
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/* Genode's VirtualBox includes */
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#include "sup.h"
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static bool enabled = true;
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VMMR3DECL(int) HWACCMR3Init(PVM pVM)
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{
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/*
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* We always set the fHWACCMEnabled flag. Otherwise, the EM won't
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* consult us for taking scheduling decisions. The actual switch to
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* HW accelerated mode is still dependent on the result of the
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* HWACCMR3CanExecuteGuest function.
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*/
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pVM->fHWACCMEnabled = true;
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for (VMCPUID i = 0; i < pVM->cCpus; i++)
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pVM->aCpus[i].hwaccm.s.fActive = false;
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return VINF_SUCCESS;
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}
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VMMR3_INT_DECL(int) HWACCMR3InitCompleted(PVM pVM, VMINITCOMPLETED enmWhat)
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{
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enabled = pVM->hwaccm.s.svm.fSupported || pVM->hwaccm.s.vmx.fSupported;
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if (!enabled || enmWhat != VMINITCOMPLETED_RING0)
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return VINF_SUCCESS;
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int rc = SUPR3CallVMMR0Ex(pVM->pVMR0, 0 /*idCpu*/, VMMR0_DO_HWACC_SETUP_VM, 0, NULL);
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return rc;
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}
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VMMR3DECL(bool) HWACCMR3IsVmxPreemptionTimerUsed(PVM pVM)
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{
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PLOG("HWACCMR3IsVmxPreemptionTimerUsed");
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return false;
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}
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VMMR3DECL(bool) HWACCMR3IsActive(PVMCPU pVCpu)
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{
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return pVCpu->hwaccm.s.fActive;
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}
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VMMR3DECL(bool) HWACCMR3IsRescheduleRequired(PVM pVM, PCPUMCTX pCtx)
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{
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/* no re-schedule on AMD-V required - just works */
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/*
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if (pVM->hwaccm.s.svm.fSupported)
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return false;
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*/
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bool reschedule = !CPUMIsGuestInPagedProtectedModeEx(pCtx);
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// PLOG("reschedule %u %u %lx", reschedule, HWACCMR3CanExecuteGuest(pVM, pCtx), pCtx->cr0);
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return reschedule;
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}
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void HWACCMR3PagingModeChanged(PVM pVM, PVMCPU pVCpu, PGMMODE enmShadowMode,
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PGMMODE enmGuestMode)
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{
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// PLOG("HWACCMR3PagingModeChanged: enmShadowMode=%d enmGuestMode=%d",
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// enmShadowMode, enmGuestMode);
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}
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VMMR3DECL(bool) HWACCMR3IsEventPending(PVMCPU pVCpu)
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{
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// PLOG("HWACCMR3IsEventPending false");
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return false;
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}
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VMMR3DECL(bool) HWACCMR3CanExecuteGuest(PVM pVM, PCPUMCTX pCtx)
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{
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PVMCPU pVCpu = VMMGetCpu(pVM);
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/* AMD-V just works */
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/*
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if (pVM->hwaccm.s.svm.fSupported) {
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pVCpu->hwaccm.s.fActive = true;
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return true;
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}
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*/
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if (!enabled)
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return false;
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/* enable H/W acceleration in protected mode only */
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bool res = (pCtx->cr0 & 1) && (pCtx->cr0 & 0x80000000);
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/*
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static bool on = false;
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if (res)
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on = true;
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if (on)
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PLOG("executeguest %lx -> %x", pCtx->cr0, res);
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*/
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pVCpu->hwaccm.s.fActive = res;
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return res;
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}
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