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Bochs/bochs/cpu/msr.cc
Stanislav Shwartsman f5d55f5eb6 - Implemented Task Switch intercept in SVM, cleanup in task switch handling code 
- Changed (c) year in several cpu files
- Cleanup and indent fixes in VMX code
2012-01-11 20:21:29 +00:00

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/////////////////////////////////////////////////////////////////////////
// $Id$
/////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2008-2012 Stanislav Shwartsman
// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
//
/////////////////////////////////////////////////////////////////////////
#define NEED_CPU_REG_SHORTCUTS 1
#include "bochs.h"
#include "cpu.h"
#define LOG_THIS BX_CPU_THIS_PTR
#if BX_CPU_LEVEL >= 5
bx_bool BX_CPP_AttrRegparmN(2) BX_CPU_C::rdmsr(Bit32u index, Bit64u *msr)
{
Bit64u val64 = 0;
#if BX_CPU_LEVEL >= 6
if (bx_cpuid_support_x2apic()) {
if (index >= 0x800 && index <= 0xBFF) {
if (BX_CPU_THIS_PTR msr.apicbase & 0x400) // X2APIC mode
return BX_CPU_THIS_PTR lapic.read_x2apic(index, msr);
else
return 0;
}
}
#endif
switch(index) {
#if BX_CPU_LEVEL >= 6
case BX_MSR_SYSENTER_CS:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("RDMSR MSR_SYSENTER_CS: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR msr.sysenter_cs_msr;
break;
case BX_MSR_SYSENTER_ESP:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("RDMSR MSR_SYSENTER_ESP: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR msr.sysenter_esp_msr;
break;
case BX_MSR_SYSENTER_EIP:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("RDMSR MSR_SYSENTER_EIP: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR msr.sysenter_eip_msr;
break;
#endif
#if BX_CPU_LEVEL >= 6
case BX_MSR_MTRRCAP: // read only MSR
val64 = BX_CONST64(0x0000000000000508);
break;
case BX_MSR_MTRRPHYSBASE0:
case BX_MSR_MTRRPHYSMASK0:
case BX_MSR_MTRRPHYSBASE1:
case BX_MSR_MTRRPHYSMASK1:
case BX_MSR_MTRRPHYSBASE2:
case BX_MSR_MTRRPHYSMASK2:
case BX_MSR_MTRRPHYSBASE3:
case BX_MSR_MTRRPHYSMASK3:
case BX_MSR_MTRRPHYSBASE4:
case BX_MSR_MTRRPHYSMASK4:
case BX_MSR_MTRRPHYSBASE5:
case BX_MSR_MTRRPHYSMASK5:
case BX_MSR_MTRRPHYSBASE6:
case BX_MSR_MTRRPHYSMASK6:
case BX_MSR_MTRRPHYSBASE7:
case BX_MSR_MTRRPHYSMASK7:
val64 = BX_CPU_THIS_PTR msr.mtrrphys[index - BX_MSR_MTRRPHYSBASE0];
break;
case BX_MSR_MTRRFIX64K_00000:
val64 = BX_CPU_THIS_PTR msr.mtrrfix64k_00000;
break;
case BX_MSR_MTRRFIX16K_80000:
case BX_MSR_MTRRFIX16K_A0000:
val64 = BX_CPU_THIS_PTR msr.mtrrfix16k[index - BX_MSR_MTRRFIX16K_80000];
break;
case BX_MSR_MTRRFIX4K_C0000:
case BX_MSR_MTRRFIX4K_C8000:
case BX_MSR_MTRRFIX4K_D0000:
case BX_MSR_MTRRFIX4K_D8000:
case BX_MSR_MTRRFIX4K_E0000:
case BX_MSR_MTRRFIX4K_E8000:
case BX_MSR_MTRRFIX4K_F0000:
case BX_MSR_MTRRFIX4K_F8000:
val64 = BX_CPU_THIS_PTR msr.mtrrfix4k[index - BX_MSR_MTRRFIX4K_C0000];
break;
case BX_MSR_PAT:
val64 = BX_CPU_THIS_PTR msr.pat;
break;
case BX_MSR_MTRR_DEFTYPE:
val64 = BX_CPU_THIS_PTR msr.mtrr_deftype;
break;
#endif
case BX_MSR_TSC:
val64 = BX_CPU_THIS_PTR get_TSC();
break;
#if BX_SUPPORT_APIC
case BX_MSR_APICBASE:
val64 = BX_CPU_THIS_PTR msr.apicbase;
BX_INFO(("RDMSR: Read %08x:%08x from MSR_APICBASE", GET32H(val64), GET32L(val64)));
break;
#endif
#if BX_CPU_LEVEL >= 6
case BX_MSR_TSC_DEADLINE:
if (! bx_cpuid_support_tsc_deadline()) {
BX_ERROR(("RDMSR BX_MSR_TSC_DEADLINE: TSC-Deadline not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR lapic.get_tsc_deadline();
break;
#endif
#if BX_SUPPORT_VMX
/*
case BX_MSR_IA32_SMM_MONITOR_CTL:
BX_PANIC(("Dual-monitor treatment of SMI and SMM is not implemented"));
break;
*/
case BX_MSR_IA32_FEATURE_CONTROL:
val64 = BX_CPU_THIS_PTR msr.ia32_feature_ctrl;
break;
case BX_MSR_VMX_BASIC:
val64 = VMX_MSR_VMX_BASIC;
break;
case BX_MSR_VMX_PINBASED_CTRLS:
val64 = VMX_MSR_VMX_PINBASED_CTRLS;
break;
case BX_MSR_VMX_PROCBASED_CTRLS:
val64 = VMX_MSR_VMX_PROCBASED_CTRLS;
break;
case BX_MSR_VMX_VMEXIT_CTRLS:
val64 = VMX_MSR_VMX_VMEXIT_CTRLS;
break;
case BX_MSR_VMX_VMENTRY_CTRLS:
val64 = VMX_MSR_VMX_VMENTRY_CTRLS;
break;
case BX_MSR_VMX_PROCBASED_CTRLS2:
if (BX_CPU_THIS_PTR vmx_cap.vmx_vmexec_ctrl2_supported_bits) {
val64 = VMX_MSR_VMX_PROCBASED_CTRLS2;
break;
}
return 0;
#if BX_SUPPORT_VMX >= 2
case BX_MSR_VMX_TRUE_PINBASED_CTRLS:
val64 = VMX_MSR_VMX_TRUE_PINBASED_CTRLS;
break;
case BX_MSR_VMX_TRUE_PROCBASED_CTRLS:
val64 = VMX_MSR_VMX_TRUE_PROCBASED_CTRLS;
break;
case BX_MSR_VMX_TRUE_VMEXIT_CTRLS:
val64 = VMX_MSR_VMX_TRUE_VMEXIT_CTRLS;
break;
case BX_MSR_VMX_TRUE_VMENTRY_CTRLS:
val64 = VMX_MSR_VMX_TRUE_VMENTRY_CTRLS;
break;
case BX_MSR_VMX_EPT_VPID_CAP:
if (BX_SUPPORT_VMX_EXTENSION(BX_VMX_EPT) || BX_SUPPORT_VMX_EXTENSION(BX_VMX_VPID)) {
val64 = VMX_MSR_VMX_EPT_VPID_CAP;
break;
}
return 0;
case BX_MSR_VMX_VMFUNC:
if (BX_CPU_THIS_PTR vmx_cap.vmx_vmfunc_supported_bits) {
val64 = BX_CPU_THIS_PTR vmx_cap.vmx_vmfunc_supported_bits;
break;
}
return 0;
#endif
case BX_MSR_VMX_MISC:
val64 = VMX_MSR_MISC;
break;
case BX_MSR_VMX_CR0_FIXED0:
val64 = VMX_MSR_CR0_FIXED0;
break;
case BX_MSR_VMX_CR0_FIXED1:
val64 = VMX_MSR_CR0_FIXED1;
break;
case BX_MSR_VMX_CR4_FIXED0:
val64 = VMX_MSR_CR4_FIXED0;
break;
case BX_MSR_VMX_CR4_FIXED1:
val64 = VMX_MSR_CR4_FIXED1;
break;
case BX_MSR_VMX_VMCS_ENUM:
val64 = VMX_MSR_VMCS_ENUM;
break;
#endif
case BX_MSR_EFER:
if (! BX_CPU_THIS_PTR efer_suppmask) {
BX_ERROR(("RDMSR MSR_EFER: EFER MSR is not supported !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR efer.get32();
break;
#if BX_SUPPORT_SVM
case BX_SVM_HSAVE_PA_MSR:
if (! bx_cpuid_support_svm()) {
BX_ERROR(("RDMSR SVM_HSAVE_PA_MSR: SVM support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = BX_CPU_THIS_PTR msr.svm_hsave_pa;
break;
#endif
case BX_MSR_STAR:
if ((BX_CPU_THIS_PTR efer_suppmask & BX_EFER_SCE_MASK) == 0) {
BX_ERROR(("RDMSR MSR_STAR: SYSCALL/SYSRET support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_STAR;
break;
#if BX_SUPPORT_X86_64
case BX_MSR_LSTAR:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_LSTAR: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_LSTAR;
break;
case BX_MSR_CSTAR:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_CSTAR: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_CSTAR;
break;
case BX_MSR_FMASK:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_FMASK: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_FMASK;
break;
case BX_MSR_FSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_FSBASE: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_FSBASE;
break;
case BX_MSR_GSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_GSBASE: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_GSBASE;
break;
case BX_MSR_KERNELGSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("RDMSR MSR_KERNELGSBASE: long mode support not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_KERNELGSBASE;
break;
case BX_MSR_TSC_AUX:
if (! bx_cpuid_support_rdtscp()) {
BX_ERROR(("RDMSR MSR_TSC_AUX: RTDSCP feature not enabled !"));
return handle_unknown_rdmsr(index, msr);
}
val64 = MSR_TSC_AUX; // 32 bit MSR
break;
#endif
default:
return handle_unknown_rdmsr(index, msr);
}
BX_DEBUG(("RDMSR: read %08x:%08x from MSR %x", GET32H(val64), GET32L(val64), index));
*msr = val64;
return 1;
}
bx_bool BX_CPP_AttrRegparmN(2) BX_CPU_C::handle_unknown_rdmsr(Bit32u index, Bit64u *msr)
{
Bit64u val_64 = 0;
// Try to check cpuid_t first (can implement some MSRs)
int result = BX_CPU_THIS_PTR cpuid->rdmsr(index, &val_64);
if (result == 0)
return 0; // #GP fault due to not supported MSR
if (result < 0) {
// cpuid_t have no idea about this MSR
#if BX_CONFIGURE_MSRS
if (index < BX_MSR_MAX_INDEX && BX_CPU_THIS_PTR msrs[index]) {
val_64 = BX_CPU_THIS_PTR msrs[index]->get64();
}
else
#endif
{
// failed to find the MSR, could #GP or ignore it silently
BX_ERROR(("RDMSR: Unknown register %#x", index));
if (! BX_CPU_THIS_PTR ignore_bad_msrs)
return 0; // will result in #GP fault due to unknown MSR
}
}
*msr = val_64;
return 1;
}
#endif // BX_CPU_LEVEL >= 5
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::RDMSR(bxInstruction_c *i)
{
#if BX_CPU_LEVEL >= 5
// CPL is always 0 in real mode
if (/* !real_mode() && */ CPL!=0) {
BX_ERROR(("RDMSR: CPL != 0 not in real mode"));
exception(BX_GP_EXCEPTION, 0);
}
Bit32u index = ECX;
Bit64u val64 = 0;
#if BX_SUPPORT_SVM
if (BX_CPU_THIS_PTR in_svm_guest) {
if (SVM_INTERCEPT(SVM_INTERCEPT0_MSR)) SvmInterceptMSR(BX_READ, index);
}
#endif
#if BX_SUPPORT_VMX
if (BX_CPU_THIS_PTR in_vmx_guest)
VMexit_MSR(i, VMX_VMEXIT_RDMSR, index);
#endif
#if BX_SUPPORT_VMX >= 2
if (BX_CPU_THIS_PTR in_vmx_guest && index == 0x808) {
if (SECONDARY_VMEXEC_CONTROL(VMX_VM_EXEC_CTRL3_VIRTUALIZE_X2APIC_MODE)) {
RAX = VMX_Read_VTPR() & 0xff;
RDX = 0;
BX_NEXT_INSTR(i);
}
}
#endif
if (!rdmsr(index, &val64))
exception(BX_GP_EXCEPTION, 0);
RAX = GET32L(val64);
RDX = GET32H(val64);
#endif
BX_NEXT_INSTR(i);
}
#if BX_CPU_LEVEL >= 6
bx_bool isMemTypeValidMTRR(unsigned memtype)
{
switch(memtype) {
case BX_MEMTYPE_UC:
case BX_MEMTYPE_WC:
case BX_MEMTYPE_WT:
case BX_MEMTYPE_WP:
case BX_MEMTYPE_WB:
return 1;
default:
return 0;
}
}
BX_CPP_INLINE bx_bool isMemTypeValidPAT(unsigned memtype)
{
return (memtype == 0x07) /* UC- */ || isMemTypeValidMTRR(memtype);
}
bx_bool isValidMSR_PAT(Bit64u pat_msr)
{
if (! isMemTypeValidPAT(pat_msr & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 8) & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 16) & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 24) & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 32) & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 40) & 0xFF) ||
! isMemTypeValidPAT((pat_msr >> 48) & 0xFF) ||
! isMemTypeValidPAT(pat_msr >> 56)) return 0;
return 1;
}
bx_bool isValidMSR_FixedMTRR(Bit64u fixed_mtrr_msr)
{
if (! isMemTypeValidMTRR(fixed_mtrr_msr & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 8) & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 16) & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 24) & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 32) & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 40) & 0xFF) ||
! isMemTypeValidMTRR((fixed_mtrr_msr >> 48) & 0xFF) ||
! isMemTypeValidMTRR(fixed_mtrr_msr >> 56)) return 0;
return 1;
}
#endif
#if BX_CPU_LEVEL >= 5
bx_bool BX_CPP_AttrRegparmN(2) BX_CPU_C::wrmsr(Bit32u index, Bit64u val_64)
{
Bit32u val32_lo = GET32L(val_64);
Bit32u val32_hi = GET32H(val_64);
BX_INSTR_WRMSR(BX_CPU_ID, index, val_64);
BX_DEBUG(("WRMSR: write %08x:%08x to MSR %x", val32_hi, val32_lo, index));
#if BX_CPU_LEVEL >= 6
if (bx_cpuid_support_x2apic()) {
if (index >= 0x800 && index <= 0xBFF) {
if (BX_CPU_THIS_PTR msr.apicbase & 0x400) // X2APIC mode
return BX_CPU_THIS_PTR lapic.write_x2apic(index, val_64);
else
return 0;
}
}
#endif
switch(index) {
#if BX_CPU_LEVEL >= 6
case BX_MSR_SYSENTER_CS:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("WRMSR MSR_SYSENTER_CS: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
BX_CPU_THIS_PTR msr.sysenter_cs_msr = val32_lo;
break;
case BX_MSR_SYSENTER_ESP:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("WRMSR MSR_SYSENTER_ESP: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
#if BX_SUPPORT_X86_64
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_SYSENTER_ESP !"));
return 0;
}
#endif
BX_CPU_THIS_PTR msr.sysenter_esp_msr = val_64;
break;
case BX_MSR_SYSENTER_EIP:
if (! bx_cpuid_support_sep()) {
BX_ERROR(("WRMSR MSR_SYSENTER_EIP: SYSENTER/SYSEXIT feature not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
#if BX_SUPPORT_X86_64
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_SYSENTER_EIP !"));
return 0;
}
#endif
BX_CPU_THIS_PTR msr.sysenter_eip_msr = val_64;
break;
#endif
#if BX_CPU_LEVEL >= 6
case BX_MSR_MTRRCAP:
BX_ERROR(("WRMSR: MTRRCAP is read only MSR"));
return 0;
case BX_MSR_MTRRPHYSBASE0:
case BX_MSR_MTRRPHYSBASE1:
case BX_MSR_MTRRPHYSBASE2:
case BX_MSR_MTRRPHYSBASE3:
case BX_MSR_MTRRPHYSBASE4:
case BX_MSR_MTRRPHYSBASE5:
case BX_MSR_MTRRPHYSBASE6:
case BX_MSR_MTRRPHYSBASE7:
if (! IsValidPhyAddr(val_64)) {
BX_ERROR(("WRMSR[0x%08x]: attempt to write invalid phy addr to variable range MTRR %08x:%08x", index, val32_hi, val32_lo));
return 0;
}
// handle 8-11 reserved bits
if (! isMemTypeValidMTRR(val32_lo & 0xFFF)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to BX_MSR_MTRRPHYSBASE"));
return 0;
}
BX_CPU_THIS_PTR msr.mtrrphys[index - BX_MSR_MTRRPHYSBASE0] = val_64;
break;
case BX_MSR_MTRRPHYSMASK0:
case BX_MSR_MTRRPHYSMASK1:
case BX_MSR_MTRRPHYSMASK2:
case BX_MSR_MTRRPHYSMASK3:
case BX_MSR_MTRRPHYSMASK4:
case BX_MSR_MTRRPHYSMASK5:
case BX_MSR_MTRRPHYSMASK6:
case BX_MSR_MTRRPHYSMASK7:
if (! IsValidPhyAddr(val_64)) {
BX_ERROR(("WRMSR[0x%08x]: attempt to write invalid phy addr to variable range MTRR %08x:%08x", index, val32_hi, val32_lo));
return 0;
}
// handle 10-0 reserved bits
if (val32_lo & 0x7ff) {
BX_ERROR(("WRMSR[0x%08x]: variable range MTRR reserved bits violation %08x:%08x", index, val32_hi, val32_lo));
return 0;
}
BX_CPU_THIS_PTR msr.mtrrphys[index - BX_MSR_MTRRPHYSBASE0] = val_64;
break;
case BX_MSR_MTRRFIX64K_00000:
if (! isValidMSR_FixedMTRR(val_64)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to MSR_MTRRFIX64K_00000 !"));
return 0;
}
BX_CPU_THIS_PTR msr.mtrrfix64k_00000 = val_64;
break;
case BX_MSR_MTRRFIX16K_80000:
case BX_MSR_MTRRFIX16K_A0000:
if (! isValidMSR_FixedMTRR(val_64)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to MSR_MTRRFIX16K regsiter !"));
return 0;
}
BX_CPU_THIS_PTR msr.mtrrfix16k[index - BX_MSR_MTRRFIX16K_80000] = val_64;
break;
case BX_MSR_MTRRFIX4K_C0000:
case BX_MSR_MTRRFIX4K_C8000:
case BX_MSR_MTRRFIX4K_D0000:
case BX_MSR_MTRRFIX4K_D8000:
case BX_MSR_MTRRFIX4K_E0000:
case BX_MSR_MTRRFIX4K_E8000:
case BX_MSR_MTRRFIX4K_F0000:
case BX_MSR_MTRRFIX4K_F8000:
if (! isValidMSR_FixedMTRR(val_64)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to fixed memory range MTRR !"));
return 0;
}
BX_CPU_THIS_PTR msr.mtrrfix4k[index - BX_MSR_MTRRFIX4K_C0000] = val_64;
break;
case BX_MSR_PAT:
if (! isValidMSR_PAT(val_64)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to MSR_PAT"));
return 0;
}
BX_CPU_THIS_PTR msr.pat = val_64;
break;
case BX_MSR_MTRR_DEFTYPE:
if (! isMemTypeValidMTRR(val32_lo & 0xFF)) {
BX_ERROR(("WRMSR: attempt to write invalid Memory Type to MSR_MTRR_DEFTYPE"));
return 0;
}
if (val32_hi || (val32_lo & 0xfffff300)) {
BX_ERROR(("WRMSR: attempt to reserved bits in MSR_MTRR_DEFTYPE"));
return 0;
}
BX_CPU_THIS_PTR msr.mtrr_deftype = val32_lo;
break;
#endif
case BX_MSR_TSC:
BX_INFO(("WRMSR: write 0x%08x%08x to MSR_TSC", val32_hi, val32_lo));
BX_CPU_THIS_PTR set_TSC(val_64);
break;
#if BX_SUPPORT_APIC
case BX_MSR_APICBASE:
return relocate_apic(val_64);
#endif
#if BX_CPU_LEVEL >= 6
case BX_MSR_TSC_DEADLINE:
if (! bx_cpuid_support_tsc_deadline()) {
BX_ERROR(("WRMSR BX_MSR_TSC_DEADLINE: TSC-Deadline not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
BX_CPU_THIS_PTR lapic.set_tsc_deadline(val_64);
break;
#endif
#if BX_SUPPORT_VMX
// Support only two bits: lock bit (bit 0) and VMX enable (bit 2)
case BX_MSR_IA32_FEATURE_CONTROL:
if (BX_CPU_THIS_PTR msr.ia32_feature_ctrl & 0x1) {
BX_ERROR(("WRMSR: IA32_FEATURE_CONTROL_MSR VMX lock bit is set !"));
return 0;
}
/*
if (val_64 & ~((Bit64u)(BX_IA32_FEATURE_CONTROL_BITS))) {
BX_ERROR(("WRMSR: attempt to set reserved bits of IA32_FEATURE_CONTROL_MSR !"));
return 0;
}
*/
BX_CPU_THIS_PTR msr.ia32_feature_ctrl = val32_lo;
break;
case BX_MSR_VMX_BASIC:
case BX_MSR_VMX_PINBASED_CTRLS:
case BX_MSR_VMX_PROCBASED_CTRLS:
case BX_MSR_VMX_PROCBASED_CTRLS2:
case BX_MSR_VMX_VMEXIT_CTRLS:
case BX_MSR_VMX_VMENTRY_CTRLS:
case BX_MSR_VMX_MISC:
case BX_MSR_VMX_CR0_FIXED0:
case BX_MSR_VMX_CR0_FIXED1:
case BX_MSR_VMX_CR4_FIXED0:
case BX_MSR_VMX_CR4_FIXED1:
case BX_MSR_VMX_VMCS_ENUM:
case BX_MSR_VMX_EPT_VPID_CAP:
case BX_MSR_VMX_TRUE_PINBASED_CTRLS:
case BX_MSR_VMX_TRUE_PROCBASED_CTRLS:
case BX_MSR_VMX_TRUE_VMEXIT_CTRLS:
case BX_MSR_VMX_TRUE_VMENTRY_CTRLS:
case BX_MSR_VMX_VMFUNC:
BX_ERROR(("WRMSR: VMX read only MSR"));
return 0;
#endif
#if BX_SUPPORT_SVM
case BX_SVM_HSAVE_PA_MSR:
if (! bx_cpuid_support_svm()) {
BX_ERROR(("WRMSR SVM_HSAVE_PA_MSR: SVM support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if ((val_64 & 0xfff) != 0 || ! IsValidPhyAddr(val_64)) {
BX_ERROR(("WRMSR SVM_HSAVE_PA_MSR: invalid or not page aligned physical address !"));
}
BX_CPU_THIS_PTR msr.svm_hsave_pa = val_64;
break;
#endif
case BX_MSR_EFER:
if (! SetEFER(val_64)) return 0;
break;
case BX_MSR_STAR:
if ((BX_CPU_THIS_PTR efer_suppmask & BX_EFER_SCE_MASK) == 0) {
BX_ERROR(("RDMSR MSR_STAR: SYSCALL/SYSRET support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
MSR_STAR = val_64;
break;
#if BX_SUPPORT_X86_64
case BX_MSR_LSTAR:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_LSTAR: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_LSTAR !"));
return 0;
}
MSR_LSTAR = val_64;
break;
case BX_MSR_CSTAR:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_CSTAR: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_CSTAR !"));
return 0;
}
MSR_CSTAR = val_64;
break;
case BX_MSR_FMASK:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_FMASK: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
MSR_FMASK = (Bit32u) val_64;
break;
case BX_MSR_FSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_FSBASE: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_FSBASE !"));
return 0;
}
MSR_FSBASE = val_64;
break;
case BX_MSR_GSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_GSBASE: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_GSBASE !"));
return 0;
}
MSR_GSBASE = val_64;
break;
case BX_MSR_KERNELGSBASE:
if (! bx_cpuid_support_x86_64()) {
BX_ERROR(("WRMSR MSR_KERNELGSBASE: long mode support not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
if (! IsCanonical(val_64)) {
BX_ERROR(("WRMSR: attempt to write non-canonical value to MSR_KERNELGSBASE !"));
return 0;
}
MSR_KERNELGSBASE = val_64;
break;
case BX_MSR_TSC_AUX:
if (! bx_cpuid_support_rdtscp()) {
BX_ERROR(("WRMSR MSR_TSC_AUX: RTDSCP feature not enabled !"));
return handle_unknown_wrmsr(index, val_64);
}
MSR_TSC_AUX = val32_lo;
break;
#endif // #if BX_SUPPORT_X86_64
default:
return handle_unknown_wrmsr(index, val_64);
}
return 1;
}
bx_bool BX_CPP_AttrRegparmN(2) BX_CPU_C::handle_unknown_wrmsr(Bit32u index, Bit64u val_64)
{
// Try to check cpuid_t first (can implement some MSRs)
int result = BX_CPU_THIS_PTR cpuid->wrmsr(index, val_64);
if (result == 0)
return 0; // #GP fault due to not supported MSR
if (result < 0) {
// cpuid_t have no idea about this MSR
#if BX_CONFIGURE_MSRS
if (index < BX_MSR_MAX_INDEX && BX_CPU_THIS_PTR msrs[index]) {
if (! BX_CPU_THIS_PTR msrs[index]->set64(val_64)) {
BX_ERROR(("WRMSR: Write failed to MSR %#x - #GP fault", index));
return 0;
}
return 1;
}
#endif
// failed to find the MSR, could #GP or ignore it silently
BX_ERROR(("WRMSR: Unknown register %#x", index));
if (! BX_CPU_THIS_PTR ignore_bad_msrs)
return 0; // will result in #GP fault due to unknown MSR
}
return 1;
}
#endif // BX_CPU_LEVEL >= 5
#if BX_SUPPORT_APIC
bx_bool BX_CPU_C::relocate_apic(Bit64u val_64)
{
/* MSR_APICBASE
* [0:7] Reserved
* [8] This is set if CPU is BSP
* [9] Reserved
* [10] X2APIC mode bit (1=enabled 0=disabled)
* [11] APIC Global Enable bit (1=enabled 0=disabled)
* [12:M] APIC Base Address (physical)
* [M:63] Reserved
*/
#define BX_MSR_APICBASE_RESERVED_BITS (0x2ff | (bx_cpuid_support_x2apic() ? 0 : 0x400))
if (BX_CPU_THIS_PTR msr.apicbase & 0x800) {
Bit32u val32_hi = GET32H(val_64), val32_lo = GET32L(val_64);
BX_INFO(("WRMSR: wrote %08x:%08x to MSR_APICBASE", val32_hi, val32_lo));
if (! IsValidPhyAddr(val_64)) {
BX_ERROR(("relocate_apic: invalid physical address"));
return 0;
}
if (val32_lo & BX_MSR_APICBASE_RESERVED_BITS) {
BX_ERROR(("relocate_apic: attempt to set reserved bits"));
return 0;
}
#if BX_CPU_LEVEL >= 6
if (bx_cpuid_support_x2apic()) {
unsigned apic_state = (BX_CPU_THIS_PTR msr.apicbase >> 10) & 3;
unsigned new_state = (val32_lo >> 10) & 3;
if (new_state == BX_APIC_STATE_INVALID) {
BX_ERROR(("relocate_apic: attempt to set invalid apic state"));
return 0;
}
if (apic_state == BX_APIC_X2APIC_MODE && new_state != BX_APIC_GLOBALLY_DISABLED) {
BX_ERROR(("relocate_apic: attempt to switch from x2apic -> xapic"));
return 0;
}
}
#endif
BX_CPU_THIS_PTR msr.apicbase = (bx_phy_address) val_64;
BX_CPU_THIS_PTR lapic.set_base(BX_CPU_THIS_PTR msr.apicbase);
// TLB flush is required for emulation correctness
TLB_flush(); // don't care about performance of apic relocation
}
else {
BX_INFO(("WRMSR: MSR_APICBASE APIC global enable bit cleared !"));
}
return 1;
}
#endif
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::WRMSR(bxInstruction_c *i)
{
#if BX_CPU_LEVEL >= 5
// CPL is always 0 in real mode
if (/* !real_mode() && */ CPL!=0) {
BX_ERROR(("WRMSR: CPL != 0 not in real mode"));
exception(BX_GP_EXCEPTION, 0);
}
Bit64u val_64 = ((Bit64u) EDX << 32) | EAX;
Bit32u index = ECX;
#if BX_SUPPORT_SVM
if (BX_CPU_THIS_PTR in_svm_guest) {
if (SVM_INTERCEPT(SVM_INTERCEPT0_MSR)) SvmInterceptMSR(BX_WRITE, index);
}
#endif
#if BX_SUPPORT_VMX
if (BX_CPU_THIS_PTR in_vmx_guest)
VMexit_MSR(i, VMX_VMEXIT_WRMSR, index);
#endif
#if BX_SUPPORT_VMX >= 2
if (BX_CPU_THIS_PTR in_vmx_guest && index == 0x808) {
if (SECONDARY_VMEXEC_CONTROL(VMX_VM_EXEC_CTRL3_VIRTUALIZE_X2APIC_MODE)) {
VMX_Write_VTPR(AL);
BX_NEXT_INSTR(i);
}
}
#endif
if (! wrmsr(index, val_64))
exception(BX_GP_EXCEPTION, 0);
#endif
BX_NEXT_INSTR(i);
}
#if BX_CONFIGURE_MSRS
int BX_CPU_C::load_MSRs(const char *file)
{
char line[512];
unsigned linenum = 0;
Bit32u index, type;
Bit32u reset_hi, reset_lo;
Bit32u rsrv_hi, rsrv_lo;
Bit32u ignr_hi, ignr_lo;
FILE *fd = fopen (file, "r");
if (fd == NULL) return -1;
int retval = 0;
do {
linenum++;
char* ret = fgets(line, sizeof(line)-1, fd);
line[sizeof(line) - 1] = '\0';
size_t len = strlen(line);
if (len>0 && line[len-1] < ' ')
line[len-1] = '\0';
if (ret != NULL && strlen(line)) {
if (line[0] == '#') continue;
retval = sscanf(line, "%x %d %08x %08x %08x %08x %08x %08x",
&index, &type, &reset_hi, &reset_lo, &rsrv_hi, &rsrv_lo, &ignr_hi, &ignr_lo);
if (retval < 8) {
retval = -1;
BX_PANIC(("%s:%d > error parsing MSRs config file!", file, linenum));
break; // quit parsing after first error
}
if (index >= BX_MSR_MAX_INDEX) {
BX_PANIC(("%s:%d > MSR index is too big !", file, linenum));
continue;
}
if (BX_CPU_THIS_PTR msrs[index]) {
BX_PANIC(("%s:%d > MSR[0x%03x] is already defined!", file, linenum, index));
continue;
}
if (type > 2) {
BX_PANIC(("%s:%d > MSR[0x%03x] unknown type !", file, linenum, index));
continue;
}
BX_INFO(("loaded MSR[0x%03x] type=%d %08x:%08x %08x:%08x %08x:%08x", index, type,
reset_hi, reset_lo, rsrv_hi, rsrv_lo, ignr_hi, ignr_lo));
BX_CPU_THIS_PTR msrs[index] = new MSR(index, type,
((Bit64u)(reset_hi) << 32) | reset_lo,
((Bit64u) (rsrv_hi) << 32) | rsrv_lo,
((Bit64u) (ignr_hi) << 32) | ignr_lo);
}
} while (!feof(fd));
fclose(fd);
return retval;
}
#endif
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