Hypervisor Handling of Architectural MSRs
The following table contains a list of architectural MSRs and describes how the hypervisor handles them. The default behavior for MSRs that are not listed in the following table is passthrough to hardware for root, and #GP for non-root.
| MSR number | MSR name | Root | Non-root |
|---|---|---|---|
|
0x010 |
X64_MSR_TIME_STAMP_COUNTER |
Virtual TSC |
Virtualize |
|
0x01B |
X64_MSR_APIC_BASE |
Virtualize |
Virtualize |
|
0x0FE |
X64MSR_MTRRCAP |
Passthrough |
Virtualize |
|
0x174 |
X64_MSR_SYSENTER_CS |
Virtualize |
Virtualize |
|
0x175 |
X64_MSR_SYSENTER_ESP |
Virtualize |
Virtualize |
|
0x176 |
X64_MSR_SYSENTER_EIP |
Virtualize |
Virtualize |
|
0x179 |
X64_MSR_MCG_CAP |
Passthrough |
0 |
|
0x17A |
X64_MSR_MCG_STATUS |
Virtualize |
Virtualize |
|
0x1D9 |
X64_MSR_DEBUG_CTL |
Virtualize |
Virtualize |
|
0x200 |
X64_MSR_MTRR_PHYSBASE0 |
Passthrough |
Virtualize |
|
0x201 |
X64_MSR_MTRR_PHYSMASK0 |
Passthrough |
Virtualize |
|
0x202 |
X64_MSR_MTRR_PHYSBASE1 |
Passthrough |
Virtualize |
|
0x203 |
X64_MSR_MTRR_PHYSMASK1 |
Passthrough |
Virtualize |
|
0x204 |
X64_MSR_MTRR_PHYSBASE2 |
Passthrough |
Virtualize |
|
0x205 |
X64_MSR_MTRR_PHYSMASK2 |
Passthrough |
Virtualize |
|
0x206 |
X64_MSR_MTRR_PHYSBASE3 |
Passthrough |
Virtualize |
|
0x207 |
X64_MSR_MTRR_PHYSMASK3 |
Passthrough |
Virtualize |
|
0x208 |
X64_MSR_MTRR_PHYSBASE4 |
Passthrough |
Virtualize |
|
0x209 |
X64_MSR_MTRR_PHYSMASK4 |
Passthrough |
Virtualize |
|
0x20A |
X64_MSR_MTRR_PHYSBASE5 |
Passthrough |
Virtualize |
|
0x20B |
X64_MSR_MTRR_PHYSMASK5 |
Passthrough |
Virtualize |
|
0x20C |
X64_MSR_MTRR_PHYSBASE6 |
Passthrough |
Virtualize |
|
0x20D |
X64_MSR_MTRR_PHYSMASK6 |
Passthrough |
Virtualize |
|
0x20E |
X64_MSR_MTRR_PHYSBASE7 |
Passthrough |
Virtualize |
|
0x20F |
X64_MSR_MTRR_PHYSMASK7 |
Passthrough |
Virtualize |
|
0x250 |
X64_MSRMTRR_FIX64K_00000 |
Passthrough |
Virtualize |
|
0x258 |
X64_MSR_MTRR_FIX16K_80000 |
Passthrough |
Virtualize |
|
0x259 |
X64_MSR_MTRR_FIX16K_A0000 |
Passthrough |
Virtualize |
|
0x268 |
X64_MSR_MTRR_FIX4K_C0000 |
Passthrough |
Virtualize |
|
0x269 |
X64_MSR_MTRR_FIX4K_C8000 |
Passthrough |
Virtualize |
|
0x26A |
X64_MSR_MTRR_FIX4K_D0000 |
Passthrough |
Virtualize |
|
0x26B |
X64_MSR_MTRR_FIX4K_D8000 |
Passthrough |
Virtualize |
|
0x26C |
X64_MSR_MTRR_FIX4K_E0000 |
Passthrough |
Virtualize |
|
0x26D |
X64_MSR_MTRR_FIX4K_E8000 |
Passthrough |
Virtualize |
|
0x26E |
X64_MSR_MTRR_FIX4K_F0000 |
Passthrough |
Virtualize |
|
0x26F |
X64_MSR_MTRR_FIX4K_F8000 |
Passthrough |
Virtualize |
|
0x277 |
X64_MSR_CR_PAT |
Virtualize |
Virtualize |
|
0x2FF |
X64_MSR_MTRR_DEF_TYPE |
Passthrough |
Virtualize |
|
0xC0000080 |
X64_MSR_EFER |
Virtualize |
Virtualize |
|
0xC0000081 |
X64_MSR_STAR |
Virtualize |
Virtualize |
|
0xC0000082 |
X64_MSR_LSTAR |
Virtualize |
Virtualize |
|
0xC0000083 |
X64_MSR_CSTAR |
Virtualize |
Virtualize |
|
0xC0000084 |
X64_MSR_SFMASK |
Virtualize |
Virtualize |
|
0xC0000100 |
X64_MSR_FS_BASE |
Virtualize |
Virtualize |
|
0xC0000101 |
X64_MSR_GS_BASE |
Virtualize |
Virtualize |
|
0xC0000102 |
X64_MSR_KERNEL_GS_BASE |
Virtualize |
Virtualize |
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Build date: 11/16/2013