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/* $Id: CPUMRZ.cpp $ */
/** @file
* CPUM - Raw-mode and ring-0 context.
*/
/*
* Copyright (C) 2016-2023 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_CPUM
#include <VBox/vmm/cpum.h>
#include "CPUMInternal.h"
#include <VBox/vmm/vmcc.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <VBox/vmm/hm.h>
#include <iprt/assert.h>
#include <iprt/x86.h>
/**
* Prepares the host FPU/SSE/AVX stuff for IEM action.
*
* This will make sure the FPU/SSE/AVX guest state is _not_ loaded in the CPU.
* This will make sure the FPU/SSE/AVX host state is saved.
* Finally, it will make sure the FPU/SSE/AVX host features can be safely
* accessed.
*
* @param pVCpu The cross context virtual CPU structure.
*/
VMMRZ_INT_DECL(void) CPUMRZFpuStatePrepareHostCpuForUse(PVMCPUCC pVCpu)
{
pVCpu->cpum.s.fChanged |= CPUM_CHANGED_FPU_REM;
switch (pVCpu->cpum.s.fUseFlags & (CPUM_USED_FPU_GUEST | CPUM_USED_FPU_HOST))
{
case 0:
if (cpumRZSaveHostFPUState(&pVCpu->cpum.s) == VINF_CPUM_HOST_CR0_MODIFIED)
HMR0NotifyCpumModifiedHostCr0(pVCpu);
Log6(("CPUMRZFpuStatePrepareHostCpuForUse: #0 - %#x\n", ASMGetCR0()));
break;
case CPUM_USED_FPU_HOST:
Log6(("CPUMRZFpuStatePrepareHostCpuForUse: #1 - %#x\n", ASMGetCR0()));
break;
case CPUM_USED_FPU_GUEST | CPUM_USED_FPU_HOST:
cpumRZSaveGuestFpuState(&pVCpu->cpum.s, true /*fLeaveFpuAccessible*/);
#ifdef IN_RING0
HMR0NotifyCpumUnloadedGuestFpuState(pVCpu);
#endif
Log6(("CPUMRZFpuStatePrepareHostCpuForUse: #2 - %#x\n", ASMGetCR0()));
break;
default:
AssertFailed();
}
}
/**
* Makes sure the FPU/SSE/AVX guest state is saved in CPUMCPU::Guest and will be
* reloaded before direct use.
*
* No promisses about the FPU/SSE/AVX host features are made.
*
* @param pVCpu The cross context virtual CPU structure.
*/
VMMRZ_INT_DECL(void) CPUMRZFpuStateActualizeForChange(PVMCPUCC pVCpu)
{
CPUMRZFpuStatePrepareHostCpuForUse(pVCpu);
}
/**
* Makes sure the FPU/SSE/AVX state in CPUMCPU::Guest is up to date.
*
* This will not cause CPUM_USED_FPU_GUEST to change.
*
* @param pVCpu The cross context virtual CPU structure.
*/
VMMRZ_INT_DECL(void) CPUMRZFpuStateActualizeForRead(PVMCPUCC pVCpu)
{
if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
{
Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
cpumRZSaveGuestFpuState(&pVCpu->cpum.s, false /*fLeaveFpuAccessible*/);
pVCpu->cpum.s.fUseFlags |= CPUM_USED_FPU_GUEST;
pVCpu->cpum.s.Guest.fUsedFpuGuest = true;
Log7(("CPUMRZFpuStateActualizeForRead\n"));
}
}
/**
* Makes sure the XMM0..XMM15 and MXCSR state in CPUMCPU::Guest is up to date.
*
* This will not cause CPUM_USED_FPU_GUEST to change.
*
* @param pVCpu The cross context virtual CPU structure.
*/
VMMRZ_INT_DECL(void) CPUMRZFpuStateActualizeSseForRead(PVMCPUCC pVCpu)
{
#if defined(VBOX_WITH_KERNEL_USING_XMM) && HC_ARCH_BITS == 64
NOREF(pVCpu);
#else
if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
{
Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
cpumRZSaveGuestSseRegisters(&pVCpu->cpum.s);
Log7(("CPUMRZFpuStateActualizeSseForRead\n"));
}
#endif
}
/**
* Makes sure the YMM0..YMM15 and MXCSR state in CPUMCPU::Guest is up to date.
*
* This will not cause CPUM_USED_FPU_GUEST to change.
*
* @param pVCpu The cross context virtual CPU structure.
*/
VMMRZ_INT_DECL(void) CPUMRZFpuStateActualizeAvxForRead(PVMCPUCC pVCpu)
{
if (pVCpu->cpum.s.fUseFlags & CPUM_USED_FPU_GUEST)
{
Assert(pVCpu->cpum.s.Guest.fUsedFpuGuest);
cpumRZSaveGuestAvxRegisters(&pVCpu->cpum.s);
Log7(("CPUMRZFpuStateActualizeAvxForRead\n"));
}
}
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