35-30 Vol. 3C
MODEL-SPECIFIC REGISTERS (MSRS)
489H
1161
IA32_VMX_CR4_FIXED1
Capability Reporting Register of CR4 Bits
Fixed to 1 (R/O)
See Appendix A.8, “VMX-Fixed Bits in CR4.”
If CPUID.01H:ECX.[5] = 1
48AH
1162
IA32_VMX_VMCS_ENUM
Capability Reporting Register of VMCS
Field Enumeration (R/O)
See Appendix A.9, “VMCS Enumeration.”
If CPUID.01H:ECX.[5] = 1
48BH
1163
IA32_VMX_PROCBASED_CTLS2
Capability Reporting Register of
Secondary Processor-based
VM-execution Controls (R/O)
See Appendix A.3.3, “Secondary Processor-
If ( CPUID.01H:ECX.[5] &&
IA32_VMX_PROCBASED_C
TLS[63])
48CH
1164
IA32_VMX_EPT_VPID_CAP
Capability Reporting Register of EPT and
VPID (R/O)
See Appendix A.10, “VPID and EPT
If ( CPUID.01H:ECX.[5] &&
IA32_VMX_PROCBASED_C
TLS[63] && (
IA32_VMX_PROCBASED_C
TLS2[33] ||
IA32_VMX_PROCBASED_C
TLS2[37]) )
48DH
1165
IA32_VMX_TRUE_PINBASED_CTLS
Capability Reporting Register of Pin-
based VM-execution Flex Controls (R/O)
See Appendix A.3.1, “Pin-Based VM-
If ( CPUID.01H:ECX.[5] = 1
&& IA32_VMX_BASIC[55] )
48EH
1166
IA32_VMX_TRUE_PROCBASED_CTLS
Capability Reporting Register of Primary
Processor-based VM-execution Flex
Controls (R/O)
See Appendix A.3.2, “Primary Processor-
If( CPUID.01H:ECX.[5] = 1
&& IA32_VMX_BASIC[55] )
48FH
1167
IA32_VMX_TRUE_EXIT_CTLS
Capability Reporting Register of VM-exit
Flex Controls (R/O)
See Appendix A.4, “VM-Exit Controls.”
If( CPUID.01H:ECX.[5] = 1
&& IA32_VMX_BASIC[55] )
490H
1168
IA32_VMX_TRUE_ENTRY_CTLS
Capability Reporting Register of VM-
entry Flex Controls (R/O)
See Appendix A.5, “VM-Entry Controls.”
If( CPUID.01H:ECX.[5] = 1
&& IA32_VMX_BASIC[55] )
491H
1169
IA32_VMX_VMFUNC
Capability Reporting Register of VM-
function Controls (R/O)
If( CPUID.01H:ECX.[5] = 1
&& IA32_VMX_BASIC[55] )
4C1H
1217
IA32_A_PMC0
Full Width Writable IA32_PMC0 Alias (R/W) (If CPUID.0AH: EAX[15:8] >
0) &&
IA32_PERF_CAPABILITIES[
13] = 1
4C2H
1218
IA32_A_PMC1
Full Width Writable IA32_PMC1 Alias (R/W) (If CPUID.0AH: EAX[15:8] >
1) &&
IA32_PERF_CAPABILITIES[
13] = 1
Table 35-2. IA-32 Architectural MSRs (Contd.)
Register
Address
Architectural MSR Name and bit
fields
(Former MSR Name)
MSR/Bit Description
Comment
Hex
Decimal